CA1120758A - Apparatus for processing waste paper - Google Patents
Apparatus for processing waste paperInfo
- Publication number
- CA1120758A CA1120758A CA000349729A CA349729A CA1120758A CA 1120758 A CA1120758 A CA 1120758A CA 000349729 A CA000349729 A CA 000349729A CA 349729 A CA349729 A CA 349729A CA 1120758 A CA1120758 A CA 1120758A
- Authority
- CA
- Canada
- Prior art keywords
- pulper
- sieve
- stock
- rejects
- holes
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
- D21B1/30—Defibrating by other means
- D21B1/32—Defibrating by other means of waste paper
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
- D21B1/30—Defibrating by other means
- D21B1/34—Kneading or mixing; Pulpers
- D21B1/345—Pulpers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/64—Paper recycling
Abstract
6565 INVENTORS: WOLFGANG HEINBOCKEL, WOLFGANG SIEWERT, CAN ALBRECHT KAHMANN and GERHARD LAMBRECHT
INVENTION: APPARATUS FOR PROCESSING WASTE PAPER
ABSTRACT OF THE DISCLOSURE
An installation for processing waste paper con taining a stock pulper or slusher equipped with a rotor and two sieves or screens having different size holes or openings.
By means of the sieve having the larger size openings there is conducted the obtained stock suspension through a primary line system which, for instance, leads to a papermaking mach-ine. Cooperating with the sieve having the larger size open-ings or holes is an auxiliary circulation circuit containing a device for the removal of contaminants or rejects. There is preferably arranged at the auxiliary circulation circuit or system a separator for heavy contaminants or rejects, a pump, a secondary-stock pulper or fiberizer and a sieve or filtering device.
INVENTION: APPARATUS FOR PROCESSING WASTE PAPER
ABSTRACT OF THE DISCLOSURE
An installation for processing waste paper con taining a stock pulper or slusher equipped with a rotor and two sieves or screens having different size holes or openings.
By means of the sieve having the larger size openings there is conducted the obtained stock suspension through a primary line system which, for instance, leads to a papermaking mach-ine. Cooperating with the sieve having the larger size open-ings or holes is an auxiliary circulation circuit containing a device for the removal of contaminants or rejects. There is preferably arranged at the auxiliary circulation circuit or system a separator for heavy contaminants or rejects, a pump, a secondary-stock pulper or fiberizer and a sieve or filtering device.
Description
b~
BACKGROUND OF THE INVENTION
.
The present invention relates to a new and improved construction of apparatus or installation for processing waste paper.
Generally speaking, the waste paper processing apparatus of the present development is of the type comprising a stock pulper equipped with a housing containing therein a rotor and a sieve or screen plate located at the reg~on of the rotor. The sieve plate is provided with openings through which the liquid stock suspension, formed during pulping and slushing of the waste paper, is removed for further treatment and process-ing at a papermaking machine.
.
An installation of this type is disclosed, by way of example, in German Patent No. 2,757,580. ~ith this prior art waste paper processing installation, the stock suspension~
obtained by defiberizing the waste paper, is withdrawn through the sieve or screen plate and, following removal of heavy re- ;~
jects or contaminants, is infed to a secondary stock pulper.
In this secondary stock pulper, containing a rotor movable about a sieve, there is further refined the stock suspension, ~here-upon the good stock is withdrawn through the sieve for ~urther treatment and use. In the secondary~pulper there are removed ' ~ .
{~
and separated light rejects or contaminants,such as for in-stance nlastic parts and plastic foils, by means of a special outlet leading from the center of a vortex core of the second-ary pulper.
The heretofore installation is afflicted with the ; drawback that the light rejects, such as the aforementioned plastic foils, prior to their separation are comminuted rel-atively intensely. This, in turn, constitutes an unuseful expenditure in both time and energy. Also, there exists the danger of clogging the relatively small openings or holes of the sieve or screen plate of the stock pulper.
SUM~P~RY OF THE INVENTION
Therefore, with the foregoin~ in mind it is a primary object of the present invention to provide a new and improyed apparatus for processing waste paPer which is not afflicated with the aforementioned drawbacks and limitations of the prior art constructions.
Another and more specific object of the present `~
invention aims at improving upon the heretofore known waste paper processing installation, and speci~ically with the ob~
jective of enabling separation of undesired constituents, es~
7~
pecially the aforementioned plastic foils and also other areal parts or elements, particularly those which are insolu~le in water, prior to their intensified comminution or size re- :
duction.
A further object of the invention is to devise an apparatus for processing waste paper which also renders possible early removal of heavy contaminants or rejects.
In keeping with the aforementioned objectives, th.e invention further is intended to provide an apparatus for proc-essing waste paper which, on the one hand, a~fords saving in ~.
comminution energy andt on the other hand, also appreciably improves upon the mode of operation of the waste paper process-ing apparatus.
Now in order to implement these and still further objects of the invention, which will become more readily apparent as the description proceeds~ the waste paper process~
ing apparatus or installation of the present development is ~:
manifested by the features that, there is located at the region of the rotor a second sieve or screen plate or equivalent struc-ture, whose openinqs or holes are larger than the $ize of the openings of the first sieve or screen ~late. In flow communic~ .
ation with the second sieve plate having the large size open~
ings is a line or conduit of an auxiliary circulation circuit or system which leads back to the stock pulper and at which there is arranged at least one device for the removal of un~
desired constituents out of the stock suspension.
Due to the removal of coarser contaminants which are insoluble in water, from the stock pulper~ throu~h the larger openings of the second sieve plate, there is rendered possible the separation of such water insoluble contaminants before they are further comminuted or reduced in size in the stock pulper or, in factr in the subsequently arranged secondary pulper or fiberizer. This comminution requires an additional expenditure in work and, furthermore, renders more difficult the separation of the thus obtained small particles from the stock suspension or liquid.
The device for the removal of undes;red constituents from the stock suspension may be a sieve or filter device which is arranged at the auxiliary circulation system or circuit.
Preferably, the sieve or filter device of the aux~
iliary circulation circuit can be constituted by a s~econdary pulper or fiberizer having a rotor which is movable about a sieve or screen. This secondary pulper or fiberizex is provided with outlets for good stock passing through the sieve or screen~
for light contaminants or rejects and for heavy contaminants or rejects. This secondary stock pulper, whi`ch can be equipped with a sieve or screen possessing larger openings or holes, than those of the previously mentioned secondary pulper arranged at the main line, on the one hand causes, by vixtue of the action of its turbulent field, a good separation of rejects or contaminants and, additionally, also enables a subsequent de-fiberizing of paper shreds or pieces or the like which, together with the foil pieces, have reached the auxiliary circulation system.
In the auxiliary circulation system or circuit there can be arranged forwardly of the secondary pulper a separator for heavy rejects. Bv virtue of this arrangement there is beneficially realized a rapid separation of the heavy rejects or contaminants, such as, for instance, stones and rocks and metal parts, thereby protecting downstream arranged components of the waste paper processing installation.
At the light weight constituent outlet of the second-ary pulper there can be connected a sieve or ~iltering device for separating large surface light rejects, and the good stock obtained at the sieves or filters can be rec~cled back to the stock pulper. With this technique and system design it is~
possible to further increase the yield of usaBle fibers, s;~nce prior to separation of the areal or extended or surface~like contaminants, such as plastic foils~ there can he remoyed therefrom any paper fibers which possibly have adhered thereto.
The auxiliary circulation circuit can be ~rovided with a connection line for the infeed of dilution ~ater. By virtue of the thus obtainable increased dilution it is possible to augment the mode of operation of the different refining de-vices.
Preferably, there can be connected into the line of the auxiliary circulation system, hetween the separator for the heavy rejects and the secondary pulper, a circulation pump for feeding the suspension to the secondary pulper. The connection line for the dilution water is connected at the line of the auxiliary circulation circuit, viewed in the flow direction, forwardly of the separator for the heavy contaminants or rejects.
With such type of arrangement there is realized the advantage that the dilution water is infed at a location where there is -~
effective the negative pressure or vacuum o~ the suction line or conduit of the circulation pump. Moreover, at the same t;~me `
there can be improved the mode of operation of the separator b~
the action of the dilution water and, on the othRx hand, the circulation pump is protected by the separator against damage due to heavy rejects ~r contaminants. ~`
BRIEF DESCRIPTION OF THE DR~WINGS
.
The invention will be better understood and objects other than those set ~orth above, will become apparent when consideration is given to the follow~ng detailed description thereof. Such description makes reference to the annexed drawings wherein:
Figure 1 is a schematic sho~ina of a waste paper proc-essing apparatus or installation according to the invention;
Figure 2 is a schematic sectional view of part of the arrangement of Figure 1, taken substantially along the line II-II thereof.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
... .. ~
Describing now the drawings, in Figure 1 there is illustrated an exemplary embodiment of apparatus or install-ation for processing waste paper, which will be seen to com-prise a stock pulper or slusher 1. The stock pulper 1 embodies a container 2 within which there is arranged a rotor 3 which is driven by a suitable drive motor 4~ At the not part~cularly referenced base or floor of the container and at the re~ion of the rotor 3 there is located a first sieve or screen plate 5 ~U7~3 having smaller holes or ~penings 6 and a second sieve or screen plate 7 having larger holes or openings 8. The open-ings or holes 6 can have, for instance, a diameter of about 20 millimeters, the other openings or holes 8 a diameter of about 70 millimeters, by way of e,xample.
Below the sieve or screen plate 5 there is arranged a removal chamber or compartment 10, and below the sieve or screen plate 7 a removal chamber or compartment 11. Both of the chambers 10 and 11 are separated from one another by a ''~
partition or separation wall 12 or equivalent structure, as particularly well seen by referring to Figure 2.
Water can be introduced into th,e container 2 of the stock pulper 1 by means of a water in~eed line or conduit 130 Additionally, there is inserted into the container 2 bales 9 '' of waste paper.
, Leading out of the chambe.r 10 o,f the stock pulper 1 is a line or conduit 14 provided with a pump 15. The line or conduit means 14 leads to a separator 16 ,from which there can be eliminated the heavy rejects or contaminants by means of ::~
a line or conduit 17 or equivalent structure~
_ g -5~
A line or conduit 18, through which there is conveyed the stock suspension or solution freed of the heavy rejects or contaminants, leads from the separator 16 to a secondary pulper or fiberizer 20. The secondary pulper 20, which may be structured for instance in the manner taught in United States Patent No. 3,942,728r granted March g, 1976, of Alfred Christ et al, contains within its housing 21 a sieve or screen 22 around which there is movable a rotor 23 which, in turn, is driven by any suitable drive motor 24~ The good or accept stock obtained in the secondary pulper 20 passes through the sieve or screen 22, through an outlet line or conduit 25 in order to be further treated and processed in a suitable papermaking machine. The secondary pulper 20 has an outlet 26 for light rejects or contaminants, such as, for instance, plastic foils and plastic parts or elements. A line or conduit 27 is connected with the outlet 26 of the secondary pulper 20, this line 27 leading to a dynamic jarrer or vibrator 28 or equivalent structure. Paper fibers which are passed through the sieve or screen 28' of the dynamic jarrer or vibrator 28, are recycled by means of a line 30 back into the stock pulper 1.
The large surface parts, retained upon the sieve or screen 28', are separated out, as the same has been symbolicall~ indicated by the arrow 31.
ii8 Additionally, the secondary pulper 20 contains an outlet 32 for the heavy rejects, with which there is flow connected, by means of a line or conduit 33, a hydrocyclone 34.
The suspension freed of the heavy rejects or parts, effluxing from the hydrocyclone 34, arrives by means of a line 35 like-wise back into the stock pulper 1.
The stock suspension which arrives in the chamber or compartment 11, through the second sieve or screen plate 8 which is provided according to the teachings of the invention, is infed through a line or conduit 36 to a separator 37. Merg-ing with the line or conduit 36 is a line 13' through which there is infed dilution water. By means of a pump 38 there is sucked-out of the separator 37, by means of the suction line or conduit 40 of such pump 38, the stock suspension which has now been freed of the heavy rejects or constituents. This stock suspension then is infed by means of a feed or conve~ing line 41 to a secondary pulper or fiberizer 42. The secondary ~ :
pulper 42, which essentially can be constructed in the same manner as the secondary pulper 20 discussed above, contains a container 43, a rotor 44, a sieve or screen 45, an outlet 46 for good stock, an outlet 47 for light rejects, and an outlet 48 for heavy rejects. Leading back into the container 2 of the stock pulper 1 from -th.e outlet 46 for the good stock. is :~
a line or conduit 50. A line or conduit 51 leads from the -- 11 ~
~3 ~Sl~
outlet 47 for the light rejects or contaminants to a rotating sieve or screen which is provided w;th a flushing water line or conduit 53 equipped with spray nozzles 5~ or equivalent structure. The flushing water line or conduit 53 is connected with the line or conduit 13. The fiber material which passes through the sieve or screen 52 is recycled, by means of a return line 55, back into the container or housing 2 of the stock pulper 1.
During operation, the lines or conduits 14, 18 and 25, extending between the stock pulper 1 and the secondary pulper 20 and out of the latter, as shown quite clearly in Figure 1, constitute the primary line or conduit arrangement `
for the processing of the substance obtained from the waste paper. The lines 36, 40, 41 and 50 form an auxiliary circulat~
ion system or circuit, which starts at the sieve or screen plate 7 having the larger holes or openings 8 and again leads back into the container 2 of the stock pulper 1. ; `
One of the most important tasks assiyned to this auxiliary circulation system or circuit is the separation of coarse contaminants or rejects, for instance plastic foils, before such are excessively commlnuted~ which otherwise would ;~
result not only in an unuseful expenditure in energy but would render the elimination thereof-more difficult. Markedly comminuted or size reduced foil particles are much more diff~
;:
~: . .. , ., ~ ..
icult to eliminate from the stock suspension th.an the coarser parts. In principle, there could be used for this purpose a sieve or screening device in the nature o~ the dynamic jarrer or vibrator 28 or a rotating sieve or screen 52.
With the preferred embodiment as shown in Figure 1, there is employed for the separation of the surface~like or areal contaminants the secondary pulper 42. Th.is secondary pulper 42 affords the advantage that pieces of not completely defiberized paper can be further comminuted or reduced in size therein, and thus, are not eliminated together with the foil pieces. These foil pieces, which are not essentially further reduced in size by the action of the rotor 44, pass through the line or conduit 51 to the sieve or screen 52 and are sep-arated-out at such sieve 52, as has been symbolically indicated by the arrow 56. Paper fibers which adhere to the foil pieces are flushed away by the spray nozzles 54 or equivalent structure and are introduced through the line 55 into the container 2. ~ .~
In order to insure for the circulation of the stock `
suspension through the l~nes 36, 40, 41 and 50 of the auxiliary circulation system or circuit, the pump 38 is advantageously arranged for~ardly of the secondary pulper 42~ Between this ::
pump 38 and the pulper 2 there i5` connected the separator 37 for the heavy rejects or contaminants, thexeby protectin~ the - 13 - :
pump 38 and the secondary pulper 42 against damage and against undesirable wear. The dilution line or conduit 13' is assigned the task of diluting the stock suspension which enters the auxiliary circulation system, in a manner such that this stock suspension can be better processed by the devices connected in the auxiliary circulation system, particularly the separator 37, the secondary pulper 42 and the rotating sieve or screen 52.
Thus, for instance, by way of example and not limitation, according to one practical embodiment the stock suspension which has been infed from the stock pulper 1 to the auxiliary circulation system is diluted from a stock suspension density of about 4% to a stock suspension density of a~out 2%, which in the case under consideration has been found to be optimum.
Through the practise of the inventive measures there is also avoided, or at the very least reduced~ the likelihood that there will arise the heretofore discussed danger of coating or clogging the holes or openings 6 of the sieve or screen plate 5. The coarser, for instance, surface-like or areal parts are :
namely withdrawn through the larger holes or openings 8 of the sieve plate 7, before they can clog the smaller openings 6 of the sieve plate 5.
As best seen by~referring to Figure l, the secondary pulper 42 of the auxiliary circulaton system can be provided 37SI~
with a hydrocyclone 60 at its outlet 48 far the heavy reJects.
The line or conduit 61, leading from the hydrocyclone 60, and carrying the fiber stock suspension freed of the heavy rejects, can be returned back to the stock pulper 1.
' : . . . .. . .
-....... . .,;
BACKGROUND OF THE INVENTION
.
The present invention relates to a new and improved construction of apparatus or installation for processing waste paper.
Generally speaking, the waste paper processing apparatus of the present development is of the type comprising a stock pulper equipped with a housing containing therein a rotor and a sieve or screen plate located at the reg~on of the rotor. The sieve plate is provided with openings through which the liquid stock suspension, formed during pulping and slushing of the waste paper, is removed for further treatment and process-ing at a papermaking machine.
.
An installation of this type is disclosed, by way of example, in German Patent No. 2,757,580. ~ith this prior art waste paper processing installation, the stock suspension~
obtained by defiberizing the waste paper, is withdrawn through the sieve or screen plate and, following removal of heavy re- ;~
jects or contaminants, is infed to a secondary stock pulper.
In this secondary stock pulper, containing a rotor movable about a sieve, there is further refined the stock suspension, ~here-upon the good stock is withdrawn through the sieve for ~urther treatment and use. In the secondary~pulper there are removed ' ~ .
{~
and separated light rejects or contaminants,such as for in-stance nlastic parts and plastic foils, by means of a special outlet leading from the center of a vortex core of the second-ary pulper.
The heretofore installation is afflicted with the ; drawback that the light rejects, such as the aforementioned plastic foils, prior to their separation are comminuted rel-atively intensely. This, in turn, constitutes an unuseful expenditure in both time and energy. Also, there exists the danger of clogging the relatively small openings or holes of the sieve or screen plate of the stock pulper.
SUM~P~RY OF THE INVENTION
Therefore, with the foregoin~ in mind it is a primary object of the present invention to provide a new and improyed apparatus for processing waste paPer which is not afflicated with the aforementioned drawbacks and limitations of the prior art constructions.
Another and more specific object of the present `~
invention aims at improving upon the heretofore known waste paper processing installation, and speci~ically with the ob~
jective of enabling separation of undesired constituents, es~
7~
pecially the aforementioned plastic foils and also other areal parts or elements, particularly those which are insolu~le in water, prior to their intensified comminution or size re- :
duction.
A further object of the invention is to devise an apparatus for processing waste paper which also renders possible early removal of heavy contaminants or rejects.
In keeping with the aforementioned objectives, th.e invention further is intended to provide an apparatus for proc-essing waste paper which, on the one hand, a~fords saving in ~.
comminution energy andt on the other hand, also appreciably improves upon the mode of operation of the waste paper process-ing apparatus.
Now in order to implement these and still further objects of the invention, which will become more readily apparent as the description proceeds~ the waste paper process~
ing apparatus or installation of the present development is ~:
manifested by the features that, there is located at the region of the rotor a second sieve or screen plate or equivalent struc-ture, whose openinqs or holes are larger than the $ize of the openings of the first sieve or screen ~late. In flow communic~ .
ation with the second sieve plate having the large size open~
ings is a line or conduit of an auxiliary circulation circuit or system which leads back to the stock pulper and at which there is arranged at least one device for the removal of un~
desired constituents out of the stock suspension.
Due to the removal of coarser contaminants which are insoluble in water, from the stock pulper~ throu~h the larger openings of the second sieve plate, there is rendered possible the separation of such water insoluble contaminants before they are further comminuted or reduced in size in the stock pulper or, in factr in the subsequently arranged secondary pulper or fiberizer. This comminution requires an additional expenditure in work and, furthermore, renders more difficult the separation of the thus obtained small particles from the stock suspension or liquid.
The device for the removal of undes;red constituents from the stock suspension may be a sieve or filter device which is arranged at the auxiliary circulation system or circuit.
Preferably, the sieve or filter device of the aux~
iliary circulation circuit can be constituted by a s~econdary pulper or fiberizer having a rotor which is movable about a sieve or screen. This secondary pulper or fiberizex is provided with outlets for good stock passing through the sieve or screen~
for light contaminants or rejects and for heavy contaminants or rejects. This secondary stock pulper, whi`ch can be equipped with a sieve or screen possessing larger openings or holes, than those of the previously mentioned secondary pulper arranged at the main line, on the one hand causes, by vixtue of the action of its turbulent field, a good separation of rejects or contaminants and, additionally, also enables a subsequent de-fiberizing of paper shreds or pieces or the like which, together with the foil pieces, have reached the auxiliary circulation system.
In the auxiliary circulation system or circuit there can be arranged forwardly of the secondary pulper a separator for heavy rejects. Bv virtue of this arrangement there is beneficially realized a rapid separation of the heavy rejects or contaminants, such as, for instance, stones and rocks and metal parts, thereby protecting downstream arranged components of the waste paper processing installation.
At the light weight constituent outlet of the second-ary pulper there can be connected a sieve or ~iltering device for separating large surface light rejects, and the good stock obtained at the sieves or filters can be rec~cled back to the stock pulper. With this technique and system design it is~
possible to further increase the yield of usaBle fibers, s;~nce prior to separation of the areal or extended or surface~like contaminants, such as plastic foils~ there can he remoyed therefrom any paper fibers which possibly have adhered thereto.
The auxiliary circulation circuit can be ~rovided with a connection line for the infeed of dilution ~ater. By virtue of the thus obtainable increased dilution it is possible to augment the mode of operation of the different refining de-vices.
Preferably, there can be connected into the line of the auxiliary circulation system, hetween the separator for the heavy rejects and the secondary pulper, a circulation pump for feeding the suspension to the secondary pulper. The connection line for the dilution water is connected at the line of the auxiliary circulation circuit, viewed in the flow direction, forwardly of the separator for the heavy contaminants or rejects.
With such type of arrangement there is realized the advantage that the dilution water is infed at a location where there is -~
effective the negative pressure or vacuum o~ the suction line or conduit of the circulation pump. Moreover, at the same t;~me `
there can be improved the mode of operation of the separator b~
the action of the dilution water and, on the othRx hand, the circulation pump is protected by the separator against damage due to heavy rejects ~r contaminants. ~`
BRIEF DESCRIPTION OF THE DR~WINGS
.
The invention will be better understood and objects other than those set ~orth above, will become apparent when consideration is given to the follow~ng detailed description thereof. Such description makes reference to the annexed drawings wherein:
Figure 1 is a schematic sho~ina of a waste paper proc-essing apparatus or installation according to the invention;
Figure 2 is a schematic sectional view of part of the arrangement of Figure 1, taken substantially along the line II-II thereof.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
... .. ~
Describing now the drawings, in Figure 1 there is illustrated an exemplary embodiment of apparatus or install-ation for processing waste paper, which will be seen to com-prise a stock pulper or slusher 1. The stock pulper 1 embodies a container 2 within which there is arranged a rotor 3 which is driven by a suitable drive motor 4~ At the not part~cularly referenced base or floor of the container and at the re~ion of the rotor 3 there is located a first sieve or screen plate 5 ~U7~3 having smaller holes or ~penings 6 and a second sieve or screen plate 7 having larger holes or openings 8. The open-ings or holes 6 can have, for instance, a diameter of about 20 millimeters, the other openings or holes 8 a diameter of about 70 millimeters, by way of e,xample.
Below the sieve or screen plate 5 there is arranged a removal chamber or compartment 10, and below the sieve or screen plate 7 a removal chamber or compartment 11. Both of the chambers 10 and 11 are separated from one another by a ''~
partition or separation wall 12 or equivalent structure, as particularly well seen by referring to Figure 2.
Water can be introduced into th,e container 2 of the stock pulper 1 by means of a water in~eed line or conduit 130 Additionally, there is inserted into the container 2 bales 9 '' of waste paper.
, Leading out of the chambe.r 10 o,f the stock pulper 1 is a line or conduit 14 provided with a pump 15. The line or conduit means 14 leads to a separator 16 ,from which there can be eliminated the heavy rejects or contaminants by means of ::~
a line or conduit 17 or equivalent structure~
_ g -5~
A line or conduit 18, through which there is conveyed the stock suspension or solution freed of the heavy rejects or contaminants, leads from the separator 16 to a secondary pulper or fiberizer 20. The secondary pulper 20, which may be structured for instance in the manner taught in United States Patent No. 3,942,728r granted March g, 1976, of Alfred Christ et al, contains within its housing 21 a sieve or screen 22 around which there is movable a rotor 23 which, in turn, is driven by any suitable drive motor 24~ The good or accept stock obtained in the secondary pulper 20 passes through the sieve or screen 22, through an outlet line or conduit 25 in order to be further treated and processed in a suitable papermaking machine. The secondary pulper 20 has an outlet 26 for light rejects or contaminants, such as, for instance, plastic foils and plastic parts or elements. A line or conduit 27 is connected with the outlet 26 of the secondary pulper 20, this line 27 leading to a dynamic jarrer or vibrator 28 or equivalent structure. Paper fibers which are passed through the sieve or screen 28' of the dynamic jarrer or vibrator 28, are recycled by means of a line 30 back into the stock pulper 1.
The large surface parts, retained upon the sieve or screen 28', are separated out, as the same has been symbolicall~ indicated by the arrow 31.
ii8 Additionally, the secondary pulper 20 contains an outlet 32 for the heavy rejects, with which there is flow connected, by means of a line or conduit 33, a hydrocyclone 34.
The suspension freed of the heavy rejects or parts, effluxing from the hydrocyclone 34, arrives by means of a line 35 like-wise back into the stock pulper 1.
The stock suspension which arrives in the chamber or compartment 11, through the second sieve or screen plate 8 which is provided according to the teachings of the invention, is infed through a line or conduit 36 to a separator 37. Merg-ing with the line or conduit 36 is a line 13' through which there is infed dilution water. By means of a pump 38 there is sucked-out of the separator 37, by means of the suction line or conduit 40 of such pump 38, the stock suspension which has now been freed of the heavy rejects or constituents. This stock suspension then is infed by means of a feed or conve~ing line 41 to a secondary pulper or fiberizer 42. The secondary ~ :
pulper 42, which essentially can be constructed in the same manner as the secondary pulper 20 discussed above, contains a container 43, a rotor 44, a sieve or screen 45, an outlet 46 for good stock, an outlet 47 for light rejects, and an outlet 48 for heavy rejects. Leading back into the container 2 of the stock pulper 1 from -th.e outlet 46 for the good stock. is :~
a line or conduit 50. A line or conduit 51 leads from the -- 11 ~
~3 ~Sl~
outlet 47 for the light rejects or contaminants to a rotating sieve or screen which is provided w;th a flushing water line or conduit 53 equipped with spray nozzles 5~ or equivalent structure. The flushing water line or conduit 53 is connected with the line or conduit 13. The fiber material which passes through the sieve or screen 52 is recycled, by means of a return line 55, back into the container or housing 2 of the stock pulper 1.
During operation, the lines or conduits 14, 18 and 25, extending between the stock pulper 1 and the secondary pulper 20 and out of the latter, as shown quite clearly in Figure 1, constitute the primary line or conduit arrangement `
for the processing of the substance obtained from the waste paper. The lines 36, 40, 41 and 50 form an auxiliary circulat~
ion system or circuit, which starts at the sieve or screen plate 7 having the larger holes or openings 8 and again leads back into the container 2 of the stock pulper 1. ; `
One of the most important tasks assiyned to this auxiliary circulation system or circuit is the separation of coarse contaminants or rejects, for instance plastic foils, before such are excessively commlnuted~ which otherwise would ;~
result not only in an unuseful expenditure in energy but would render the elimination thereof-more difficult. Markedly comminuted or size reduced foil particles are much more diff~
;:
~: . .. , ., ~ ..
icult to eliminate from the stock suspension th.an the coarser parts. In principle, there could be used for this purpose a sieve or screening device in the nature o~ the dynamic jarrer or vibrator 28 or a rotating sieve or screen 52.
With the preferred embodiment as shown in Figure 1, there is employed for the separation of the surface~like or areal contaminants the secondary pulper 42. Th.is secondary pulper 42 affords the advantage that pieces of not completely defiberized paper can be further comminuted or reduced in size therein, and thus, are not eliminated together with the foil pieces. These foil pieces, which are not essentially further reduced in size by the action of the rotor 44, pass through the line or conduit 51 to the sieve or screen 52 and are sep-arated-out at such sieve 52, as has been symbolically indicated by the arrow 56. Paper fibers which adhere to the foil pieces are flushed away by the spray nozzles 54 or equivalent structure and are introduced through the line 55 into the container 2. ~ .~
In order to insure for the circulation of the stock `
suspension through the l~nes 36, 40, 41 and 50 of the auxiliary circulation system or circuit, the pump 38 is advantageously arranged for~ardly of the secondary pulper 42~ Between this ::
pump 38 and the pulper 2 there i5` connected the separator 37 for the heavy rejects or contaminants, thexeby protectin~ the - 13 - :
pump 38 and the secondary pulper 42 against damage and against undesirable wear. The dilution line or conduit 13' is assigned the task of diluting the stock suspension which enters the auxiliary circulation system, in a manner such that this stock suspension can be better processed by the devices connected in the auxiliary circulation system, particularly the separator 37, the secondary pulper 42 and the rotating sieve or screen 52.
Thus, for instance, by way of example and not limitation, according to one practical embodiment the stock suspension which has been infed from the stock pulper 1 to the auxiliary circulation system is diluted from a stock suspension density of about 4% to a stock suspension density of a~out 2%, which in the case under consideration has been found to be optimum.
Through the practise of the inventive measures there is also avoided, or at the very least reduced~ the likelihood that there will arise the heretofore discussed danger of coating or clogging the holes or openings 6 of the sieve or screen plate 5. The coarser, for instance, surface-like or areal parts are :
namely withdrawn through the larger holes or openings 8 of the sieve plate 7, before they can clog the smaller openings 6 of the sieve plate 5.
As best seen by~referring to Figure l, the secondary pulper 42 of the auxiliary circulaton system can be provided 37SI~
with a hydrocyclone 60 at its outlet 48 far the heavy reJects.
The line or conduit 61, leading from the hydrocyclone 60, and carrying the fiber stock suspension freed of the heavy rejects, can be returned back to the stock pulper 1.
' : . . . .. . .
-....... . .,;
Claims (8)
1. An apparatus for the processing of waste paper, comprising:
a stock pulper provided with a container means;
a rotor arranged within said container means of said stock pulper;
a first sieve plate having holes and located adjacent said rotor;
the liquid stock suspension formed by defiberizing the waste paper passing through the holes of said first sieve plate for further treatment and processing in a papermaking machine;
a second sieve plate provided with holes and arranged adjacent said rotor within said container means of said stock pulper;
the holes of said second sieve plate being larger in size than the holes of said first sieve plate;
an auxiliary circulation system containing line means operatively connected with the larger holes of said second sieve plate;
said line means leading back to said stock pulper; and at least one device provided for said auxiliary circulation system for the removal of undesired constitutents from said stock suspension.
a stock pulper provided with a container means;
a rotor arranged within said container means of said stock pulper;
a first sieve plate having holes and located adjacent said rotor;
the liquid stock suspension formed by defiberizing the waste paper passing through the holes of said first sieve plate for further treatment and processing in a papermaking machine;
a second sieve plate provided with holes and arranged adjacent said rotor within said container means of said stock pulper;
the holes of said second sieve plate being larger in size than the holes of said first sieve plate;
an auxiliary circulation system containing line means operatively connected with the larger holes of said second sieve plate;
said line means leading back to said stock pulper; and at least one device provided for said auxiliary circulation system for the removal of undesired constitutents from said stock suspension.
2. The apparatus as defined in claim 1, wherein:
said at least one device comprises a sieve device provided for said auxiliary circulation system.
said at least one device comprises a sieve device provided for said auxiliary circulation system.
3. The apparatus as defined in claim 1, wherein:
said at least one device comprises a secondary pulper provided for said auxiliary circulation system;
said secondary pulper comprising:
sieve means;
a rotor movable with respect to said sieve means; and respective outlet means for good stock passing through said sieve means, for light rejects and for heavy rejects.
said at least one device comprises a secondary pulper provided for said auxiliary circulation system;
said secondary pulper comprising:
sieve means;
a rotor movable with respect to said sieve means; and respective outlet means for good stock passing through said sieve means, for light rejects and for heavy rejects.
4. The apparatus as defined in claim 3, wherein:
said at least one device further comprises separator means for the heavy rejects arranged for-wardly of the secondary pulper in the aux-iliary circulation system.
said at least one device further comprises separator means for the heavy rejects arranged for-wardly of the secondary pulper in the aux-iliary circulation system.
5. The apparatus as defined in claim 4, wherein:
said at least one device further includes a sieve device for the separation of large surface light rejects which is connected with the light reject outlet means of said secondary pulper; and return line means for recycling good stock obtained at said sieve device back to said stock pulper.
said at least one device further includes a sieve device for the separation of large surface light rejects which is connected with the light reject outlet means of said secondary pulper; and return line means for recycling good stock obtained at said sieve device back to said stock pulper.
6. The apparatus as defined in claim 3, wherein:
said at least one device further includes a sieve device for the separation of large surface light rejects which is connected with the light reject outlet means of said secondary pulper; and return line means for recycling good stock obtained at said sieve device back to said stock pulper.
said at least one device further includes a sieve device for the separation of large surface light rejects which is connected with the light reject outlet means of said secondary pulper; and return line means for recycling good stock obtained at said sieve device back to said stock pulper.
7. The apparatus as defined in claim 1, further including:
connection line means for dilution water pro-vided for said auxiliary circulation system.
connection line means for dilution water pro-vided for said auxiliary circulation system.
8. The apparatus as defined in claim 4, further including:
a circulation pump arranged at said line means of said auxiliary circulation system between said separator means for the heavy rejects and said secondary pulper;
said circulation pump serving to feed the stock suspension to said secondary pulper;
connection line means for dilution water pro-vided for said auxiliary circulation system; and said connection line means for the dilution water being connected with a portion of the line means of the auxiliary circulation sys-tem, which viewed in the direction of flow, is at a location forwardly of the separator means for the heavy rejects.
a circulation pump arranged at said line means of said auxiliary circulation system between said separator means for the heavy rejects and said secondary pulper;
said circulation pump serving to feed the stock suspension to said secondary pulper;
connection line means for dilution water pro-vided for said auxiliary circulation system; and said connection line means for the dilution water being connected with a portion of the line means of the auxiliary circulation sys-tem, which viewed in the direction of flow, is at a location forwardly of the separator means for the heavy rejects.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH4190/79-7 | 1979-05-04 | ||
| CH419079 | 1979-05-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1120758A true CA1120758A (en) | 1982-03-30 |
Family
ID=4271465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000349729A Expired CA1120758A (en) | 1979-05-04 | 1980-04-11 | Apparatus for processing waste paper |
Country Status (14)
| Country | Link |
|---|---|
| US (1) | US4283275A (en) |
| JP (1) | JPS581240B2 (en) |
| AR (1) | AR219864A1 (en) |
| AT (1) | AT365676B (en) |
| BR (1) | BR8002722A (en) |
| CA (1) | CA1120758A (en) |
| DE (1) | DE2922141C2 (en) |
| ES (1) | ES8103226A1 (en) |
| FI (1) | FI801202A (en) |
| FR (1) | FR2455650A1 (en) |
| GB (1) | GB2049478B (en) |
| IT (1) | IT1141318B (en) |
| NL (1) | NL8002306A (en) |
| SE (1) | SE8003251L (en) |
Families Citing this family (27)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3127114C2 (en) * | 1980-07-10 | 1985-06-13 | J.M. Voith Gmbh, 7920 Heidenheim | Device for dissolving waste paper and sorting out fibers to be recovered from it for the production of paper, cardboard or cardboard |
| AT381123B (en) * | 1980-07-10 | 1986-08-25 | Voith Gmbh J M | PLANT FOR DISPOSING AND DISCARDING FIBER FIBERS TO BE RECOVERED FOR THE PRODUCTION OF PAPER, CARDBOARD OR CARDBOARD |
| DE3311082A1 (en) * | 1983-03-26 | 1984-09-27 | J.M. Voith Gmbh, 7920 Heidenheim | METHOD AND DEVICE FOR DISPOSAL OF A FABRIC LOSS |
| EP0164428B1 (en) * | 1984-06-09 | 1988-12-07 | Hermann Finckh Maschinenfabrik GmbH & Co. | Apparatus for pulping and sorting waste paper |
| DE3424919A1 (en) * | 1984-07-06 | 1986-01-16 | J.M. Voith Gmbh, 7920 Heidenheim | METHOD FOR RECYCLING PAPER |
| FI71175C (en) * | 1985-01-16 | 1990-10-14 | Suomen Puhallintehdas Oy | Arrangements for feeding edge ribbons e.d. in a pulper |
| DE3543205A1 (en) * | 1985-12-06 | 1987-06-11 | Voith Gmbh J M | METHOD FOR TREATING FIBROUS SUSPENSIONS IN HYDROCYCLONES |
| US4880171A (en) * | 1988-08-19 | 1989-11-14 | Garrett Roderick D | Apparatus for the production of pulp suspensions |
| CH681993A5 (en) * | 1989-08-10 | 1993-06-30 | Voith Gmbh J M | |
| SE468481B (en) * | 1991-05-29 | 1993-01-25 | Tetra Alfa Holdings | SAVED TO RECOVER SOME INGREDIENTS FROM A PACKAGING MATERIAL WASTE |
| US5390860A (en) * | 1992-05-15 | 1995-02-21 | Tetra Laval Holdings & Finance Sa | Method and apparatus for separating paper fiber and plastics from mixed waste materials and products obtained thereby |
| DE4308225C1 (en) * | 1993-03-16 | 1994-11-24 | Escher Wyss Gmbh | Process for sorting fiber suspension and screening device for carrying it out |
| US5618003A (en) * | 1995-03-09 | 1997-04-08 | Bot Chan, Inc. | Process and apparatus for reclaiming the components of used disposable sanitary articles |
| EP0829571B1 (en) * | 1996-09-12 | 2007-04-18 | Hans-Joachim Boltersdorf | Process for recovery of fibres from rejects from pulping disposal systems |
| DE19824806A1 (en) * | 1998-06-03 | 1999-12-09 | Recycling Energie Abfall | Screening device and fabric dissolving device using this |
| DE60228432D1 (en) * | 2001-04-23 | 2008-10-02 | Jlr Pulping Systems Ab | METHOD FOR PRODUCING A FIBROUS SUSPENSION FROM ALTPAPIER |
| US7758719B2 (en) * | 2005-12-16 | 2010-07-20 | Fiberight Management Llc | Wet pulping system and method for producing cellulosic insulation with low ash content |
| DE102009035247A1 (en) * | 2009-07-29 | 2011-02-03 | Biotec Sistemi S.R.L. | Pulper with torque motor |
| DE112011101665A5 (en) * | 2010-05-19 | 2013-03-21 | Hans-Joachim Boltersdorf | Pulper with a feed space and a displacement chamber |
| DE112011104148A5 (en) * | 2010-09-17 | 2013-09-05 | Hans-Joachim Boltersdorf | Pulper with a sieve plate |
| PL414125A1 (en) * | 2015-09-23 | 2017-03-27 | Pe Beskidy Spółka Z Ograniczoną Odpowiedzialnością Spółka Komandytowa | Method for fractionation of waste paper mass at the time of defibering, and for the separated fractions processing |
| CN106436407A (en) * | 2016-10-23 | 2017-02-22 | 郑建灵 | Raw material pulper |
| RU2697616C2 (en) * | 2018-02-05 | 2019-08-15 | Общество с ограниченной ответственностью "Экотехника" | Method for mechanical production of fibrous mass and device for implementation thereof |
| CN112252065A (en) * | 2018-07-02 | 2021-01-22 | 六安微领时代工业智能科技有限公司 | A crushed aggregates making beating all-in-one for making of rice paper magma |
| CN108943499B (en) * | 2018-09-05 | 2023-11-07 | 张家港市格雷斯机械有限公司 | Paper-plastic separator |
| FI20185942A (en) * | 2018-11-06 | 2020-05-07 | Valmet Technologies Oy | Screen plate, pulper, process and method for manufacturing fibre mass suspension |
| CN112934927A (en) * | 2021-04-02 | 2021-06-11 | 福建东森节能环保科技股份有限公司 | Waste paper dry pulp production line |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2033123A (en) * | 1936-03-10 | Method and apparatus for refining | ||
| US2796807A (en) * | 1954-06-22 | 1957-06-25 | Fibreboard Paper Products Corp | Method and apparatus for treating waste paper stock |
| CH568446A5 (en) * | 1973-08-27 | 1975-10-31 | Escher Wyss Gmbh | |
| US4127479A (en) * | 1973-11-08 | 1978-11-28 | J. M. Voith G.M.B.H. | Apparatus for straining suspensions |
| DE2514162B2 (en) * | 1975-03-29 | 1977-02-03 | Anlage zur Aufbereitung von Altpapier J.M. Voith GmbH, 7920 Heidenheim | PLANT FOR THE PROCESSING OF WASTE PAPER |
| CA1023985A (en) * | 1975-06-16 | 1978-01-10 | Black Clawson Company (The) | Apparatus for pulping waste paper materials |
| US4129259A (en) * | 1977-09-15 | 1978-12-12 | The Black Clawson Company | Apparatus for pulping waste paper materials |
| AT355903B (en) * | 1977-11-29 | 1980-03-25 | Escher Wyss Gmbh | PLANT FOR TREATING WASTE PAPER |
| ATA873277A (en) * | 1977-11-30 | 1980-03-15 | Escher Wyss Gmbh | PLANT FOR PROCESSING WASTE PAPER |
-
1979
- 1979-05-10 AT AT348079A patent/AT365676B/en not_active IP Right Cessation
- 1979-05-31 DE DE2922141A patent/DE2922141C2/en not_active Expired
-
1980
- 1980-04-07 US US06/137,601 patent/US4283275A/en not_active Expired - Lifetime
- 1980-04-11 CA CA000349729A patent/CA1120758A/en not_active Expired
- 1980-04-15 FI FI801202A patent/FI801202A/en not_active Application Discontinuation
- 1980-04-17 AR AR28071680A patent/AR219864A1/en active
- 1980-04-21 NL NL8002306A patent/NL8002306A/en not_active Application Discontinuation
- 1980-04-21 ES ES490746A patent/ES8103226A1/en not_active Expired
- 1980-04-24 IT IT2161080A patent/IT1141318B/en active
- 1980-04-25 FR FR8009394A patent/FR2455650A1/en not_active Withdrawn
- 1980-04-29 SE SE8003251A patent/SE8003251L/en not_active Application Discontinuation
- 1980-05-02 BR BR8002722A patent/BR8002722A/en unknown
- 1980-05-02 JP JP55059355A patent/JPS581240B2/en not_active Expired
- 1980-05-02 GB GB8014661A patent/GB2049478B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2922141A1 (en) | 1980-11-06 |
| FR2455650A1 (en) | 1980-11-28 |
| BR8002722A (en) | 1980-12-16 |
| IT1141318B (en) | 1986-10-01 |
| AT365676B (en) | 1982-02-10 |
| ATA348079A (en) | 1981-06-15 |
| US4283275A (en) | 1981-08-11 |
| ES490746A0 (en) | 1981-02-16 |
| JPS55152888A (en) | 1980-11-28 |
| GB2049478B (en) | 1982-12-08 |
| DE2922141C2 (en) | 1982-08-05 |
| NL8002306A (en) | 1980-11-06 |
| JPS581240B2 (en) | 1983-01-10 |
| FI801202A (en) | 1980-11-05 |
| AR219864A1 (en) | 1980-09-15 |
| GB2049478A (en) | 1980-12-31 |
| IT8021610A0 (en) | 1980-04-24 |
| ES8103226A1 (en) | 1981-02-16 |
| SE8003251L (en) | 1980-11-05 |
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| MKEX | Expiry |