CN107630380B - The method for recycling paper mill sludge production high-strength cow paper - Google Patents
The method for recycling paper mill sludge production high-strength cow paper Download PDFInfo
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Abstract
The invention discloses a kind of methods of recycling paper mill sludge production high-strength cow paper, including waste paper pulp pulping stage, leather fiber slurry pulping stage, sludge slurry pulping stage, wet end is manufactured paper with pulp and whitewashes step of manufacturing paper with pulp, step etc. is squeezed afterwards, wherein, sludge slurry pulping stage includes classification filters pressing sub-step, squeeze pretreatment sub-step, extrusion dehydration and inactivation sub-step, sludge squeezes out sub-step and sub-step with slurry, wet end manufacture paper with pulp and whitewash step of manufacturing paper with pulp includes that waste paper pulp manufactures paper with pulp and forms sub-step, first whitewashing is manufactured paper with pulp sub-step, second whitewashing is manufactured paper with pulp sub-step.The present invention is recycled sludge and produces brown paper, paper mill sludge is set to be regenerated use, and production cleanliness without any pollution, production technology is more energy-saving and environmentally friendly, in the paper making process by gunnite method using sludge slurry as the middle layer of brown paper, new production technology not but not reduces the quality of finished product brown paper that production obtains, and is able to ascend the intensity and toughness of finished product brown paper instead.
Description
Technical field
The present invention relates to paper-making technology fields, more particularly, to the side of recycling paper mill sludge production high-strength cow paper
Method.
Background technique
In the production process using regenerated papermaking, a large amount of sludge can be generated, in sludge in addition to impurity, microorganism, have
Machine beyond the region of objective existence also contains a large amount of long fibre and staple fiber.To the traditional treatment method of sludge, directly transport most boiler burn or
Person send to landfill area and fills.In modern production technology, more focus on environmental protection and benefit, therefore, starts to carry out sludge free of contamination
Environmental protection treatment, and secondary use sludge are more how rationally under the premise of improving productivity effect using sludge and disposition sludge
Ring of numbers is protected papermaking enterprise and is all being considered the problems of at present.
Summary of the invention
In view of the deficienciess of the prior art, the object of the present invention is to provide recycling paper mill sludges to produce high-strength cow paper
Method, be recycled sludge produce high-strength cow paper, production process cleanliness without any pollution, energy conservation and environmental protection.
To achieve the goals above, the technical scheme adopted by the invention is that: recycling paper mill sludge produce high-strength cow
The method of paper, comprising the following steps:
1) waste paper pulp pulping stage passes through pulper pulping using the waste paper or litter decoration of recycling, then sequentially through height
After dense slug removing step, coarse screening step, low dense slug removing step, fine screening step and concentration step, the waste paper of suitable papermaking is made
The slurry concentration of slurry, waste paper pulp is controlled 4~5%；
2) leather of recycling is passed through pulper pulping by leather fiber slurry pulping stage, then sequentially through highly concentrated slagging-off
After step, coarse screening step, low dense slug removing step, fine screening step and concentration step, the leather fiber slurry of suitable papermaking is made
The slurry concentration of material, leather fiber slurry is controlled 8~10%；
3) sludge slurry pulping stage, including following sub-step,
3.1) it is classified filters pressing sub-step, conveyance conduit will be entered from paper waste every the sludge pumping that slag obtains, will conveyed
Pipeline is respectively connected to thick filter press and second level filter press, and the moisture content of sludge is reduced to 70~80% in thick filter press, is made
The moisture content of sludge is reduced to 55~65% in second level filter press, makes the further volume reduction of sludge, pasted by the preliminary volume reduction of sludge
Shape sludge, the clear liquid pumped back waste water station processing that filters pressing generates, by sludge transporting pipeline by paste sludge pumping to twin-screw
Extruder；
3.2) squeeze pretreatment sub-step, the middle section of sludge transporting pipeline several positions respectively to sludge transporting pipeline
Injection liquid mould release and the high-pressure hot air that temperature is 80~90 DEG C, pressure is 1.5~2MPa, high-pressure hot air are radially square
To being injected into sludge transporting pipeline, makes the fiber and impurity loose in paste sludge, avoid sludge in subsequent extruding
It is condensed into blocks in step；
Wherein, it is natural boiled wood oil 40~50%, water-soluble colophony powder 20 that liquid mould release, which is by weight percent,
~30%, furfural 5~10% and water surplus are stirred, and make natural boiled wood oil, water-soluble colophony powder and furfural phase
It is molten and form oily emulsion；
3.3) extrusion dehydration and inactivation sub-step are squeezed after paste sludge pumping to twin (double) screw extruder by twin-screw
Two screw rods of press are pushed, and so that paste sludge is moved ahead in barrel, while the heating device for controlling barrel middle section is heated,
The temperature of the inside in barrel middle section is set to keep control at 200~220 DEG C,
Two screw flight density of twin (double) screw extruder are respectively designed to density interphase, if along direction of advance formation
Dry interleaved height squeezes volume segments and low extruding volume segments, and so that paste sludge is sequentially passed through the high of interleaved and squeeze volume
Section and low extruding volume segments are injected separately into temperature in each low extruding volume segments and are higher than low extruding volume for 110~120 DEG C, pressure
The high-pressure hot air of the interior pressure of section, by the way that each high outside dispatch high steam of pressure filter for squeezing volume segments is arranged in, and will
High steam pumped back waste water station recycles heat and purified treatment, while paste sludge pressure being avoided to form real block,
Make paste sludge in twin (double) screw extruder by extrusion process several times by a loosening and a tightening, paste sludge is squeezing
Dehydration is by cell breath several times, and moisture content, impurity and ink in the form of high steam in exclusion paste sludge,
Bacterium, microorganism and the organic matter being present in paste sludge are killed in barrel simultaneously；
3.4) sludge squeezes out sub-step, is squeezed out by twin (double) screw extruder, obtains clean hygienic sludge；
3.5) leather fiber slurry and hygienic sludge are delivered to simultaneously by the weight ratio of 1:5~6 and are stirred by sub-step with slurry
Station is mixed, is stirred evenly, viscous force is quantitatively continuously conveyed to mixing plant by metering pump in whipping process and promotes lotion, viscous force is promoted
The weight ratio of lotion and hygienic sludge is 1:80~90, and whipping process is dispersed to staple fiber and long fibre in hygienic sludge
Between the animal origin of leather fiber slurry, emulsion dispersion and the surface for being attached to staple fiber, long fibre and animal origin are obtained
Sludge centrotheca,
Wherein, viscous force promoted lotion be by weight percent be Heveatex 40~50%, natural rubber powder 30~40%,
Petroleum ether surplus is stirred, and Heveatex, natural rubber powder and petroleum ether is made to mix and form lotion；
3.6) sludge centrotheca is delivered to paste mill grinding by sludge defibrination sub-step, and the grinding flute profile selection of fiberizer is swept
Broom fin, defibrination process make staple fiber, long fibre and animal origin surface fluff rapidly, and the surface of animal origin rises and becomes mildewed, and grinds
Slurry process makes the hair side of staple fiber, long fibre and animal origin be attached with lotion simultaneously, after defibrination lotion make staple fiber
It is bonded in animal origin respectively with long fibre, and free lotion forms the internal molecule for being enclosed with mud, is had
The slurry concentration of the sludge slurry of composite fibre, sludge slurry is controlled 8~10%；
4) wet end is manufactured paper with pulp and whitewashes step of manufacturing paper with pulp, including following sub-step,
4.1) waste paper pulp, which is manufactured paper with pulp, forms sub-step, waste paper pulp is pumped in pond of manufacturing paper with pulp, by wet end in pond of manufacturing paper with pulp
In molding of manufacturing paper with pulp obtain the first secondary stock bed of material；
4.2) the first whitewashing is manufactured paper with pulp sub-step, and sludge slurry is pumped to the first whitewashing and is manufactured paper with pulp the first whitewashing pond in portion, net
Portion manufacture paper with pulp to obtain manufactured paper with pulp after the first secondary stock bed of material from the first whitewashing portion the first spray head below average rate pass through, the first spray head
It is greater than the first linear mouth spray of wet end with width, the first spray head pumps sludge slurry from the first whitewashing pond, and leads to
It crosses the first mouth spray and uniformly sprays the sludge slurry for being linked to be sheet towards wet end, it is dirty to form one on the surface of the first secondary stock bed of material
The mud bed of material；
4.3) the second whitewashing is manufactured paper with pulp sub-step, and waste paper pulp is pumped to the second whitewashing and manufactures paper with pulp the first whitewashing pond in portion, wet end
Manufacture paper with pulp to obtain manufactured paper with pulp after sludge slurry from the second whitewashing portion the second spray head below average rate pass through, the second spray head has width
Greater than the second linear mouth spray of wet end, the second spray head pumps waste paper pulp from the second whitewashing pond, and passes through the second spray
Slurry mouth uniformly sprays the waste paper pulp for being linked to be sheet towards wet end, forms second waste paper pulp on the surface of sludge pulp layer
Layer, forms compound pulp layer in wet end；
5) squeeze step after, compound pulp layer be delivered to rear press section press and is dehydrated, compound pulp layer rear press section sequentially
Roller group is squeezed by the spaced high pressure of several groups and low-pressure squeezes roller group, and the pressure control that high pressure squeezes roller group exists
0.5~0.6MPa, low-pressure squeeze the pressure control of roller group in 0.1~0.2MPa, make compound pulp layer using several times one pine
One tight expressing process, improved while improving dehydration rate the first secondary stock bed of material in compound pulp layer, sludge pulp layer with
Affinity and cohesive force between the second secondary stock bed of material, and moisture content is reduced to 40% or less；
6) the compound pulp layer Jing Guo press section press is sequentially delivered to the drying of drying cylinder portion by subsequent papermaking procedure, surface is applied
Glue machine top sizing, rear drying cylinder portion are dry；
7) finished product obtains brown paper after winding.
In further technical solution, in the extrusion dehydration and inactivation sub-step, make the width of the screw thread of twin-screw certainly
It is interior to gradually becoming smaller outside, and screw thread side is arc-shaped, and controls the tilt angle of each screw thread at 15~20 degree, makes each screw thread tool
There are anti-stick and self-cleaning ability；The flight pitch control that height squeezes volume segments exists in 8~10cm, the control of volume compression ratio
0.5~0.6, the low flight pitch control for squeezing volume segments is controlled in 12~15cm, volume compression ratio 0.8~0.9；Each
Hygroscopic agent is mixed in the low high-pressure hot air for squeezing volume segments injection；Make paste sludge using 15~20 cell breaths.
In further technical solution, in the sludge defibrination sub-step, the fin tine length of the broom fin be 1~2cm,
Width is 0.5~1cm, tooth pitch is 0.3~0.5cm, be enclosed with the average grain diameter control of the molecule of mud 0.1~
0.2mm, after defibrination lotion so that staple fiber and long fibre is bonded in animal origin respectively and form several netted sizes
Different thin fiber web layer, and the fiber number of plies having in each thin fiber web layer is 5~10 layers, thin fiber web layer
Maximum mean breadth is 5~8cm, percolation ratio when manufacturing paper with pulp for reducing wet end, while promoting shaping strength.
In further technical solution, wet end is manufactured paper with pulp and whitewashes step of manufacturing paper with pulp, including following sub-step,
4.1) waste paper pulp, which is manufactured paper with pulp, forms sub-step；
4.10) light for the first time to squeeze sub-step, make wet end by the first light press section, the first secondary stock bed of material is carried out slight
Squeezing, squeeze pressure are controlled in 0.1~0.2MPa, form the first secondary stock bed of material tentatively；
4.2) the first whitewashing is manufactured paper with pulp sub-step；The top of first spray head is provided with storage slurry room, and the width of storage slurry room is greater than
The width of wet end, storage slurry room top or side be arranged into slurry interface, by into slurry interface by first whitewashing pond sludge slurry
Material is pumped in storage slurry room, and the lower part of the first spray head, width and the storage slurry room of the first mouth spray is arranged in the first mouth spray
Of same size, in 0.5~3mm, the bottom of storage slurry room is provided with for sealing and opening for the opened gap control of the first mouth spray
The seal cover board of first mouth spray makes storage starch indoor sludge slurry by first after the first mouth spray is in the open state
Mouth spray is flowed downward out and is joined together；
4.20) second light to squeeze sub-step, make wet end by the second light press section, to the first secondary stock bed of material and sludge slurry
The bed of material is slightly squeezed, squeeze pressure control in 0.1~0.2MPa, make the first secondary stock bed of material and sludge pulp layer tentatively at
Type；
4.3) the second whitewashing is manufactured paper with pulp sub-step, structure and gunnite method and the first spray head phase of second spray head
Together；
4.30) third time is light squeezes sub-step, makes wet end by the light press section of third, to the first secondary stock bed of material, sludge slurry
The bed of material and the second secondary stock bed of material are slightly squeezed, squeeze pressure control in 0.1~0.2MPa, make the first secondary stock bed of material,
Sludge pulp layer and the second secondary stock bed of material tentatively form.
In further technical solution, first whitewashing is manufactured paper with pulp in sub-step, the first side of the lower part of storage slurry room
Extend an arc drain pulp stream pulpboard towards second side bending, second side of the lower part of storage slurry room is provided with striker plate, striker plate
Outer end edges extend in the middle part of arc drain pulp stream pulpboard, between the outer end edges of striker plate and the plate face of arc drain pulp stream pulpboard
A spillage gap is formed, the both ends in spillage gap extend respectively into the both ends of storage slurry room, and spillage gap forms first spray
Mouth is starched, the outer end edges of arc drain pulp stream pulpboard form spillage face, the back side formation one in spillage face and arc drain pulp stream pulpboard
Acute angle, the outer end in spillage face and the back side of arc drain pulp stream pulpboard intersect a linear type edge of a knife, and the linear type edge of a knife makes dirt
Material-mud forms planar curtain stream when dirty.
In further technical solution, a seal cover board, seal cover board are slidably fitted on the outside of the striker plate
It is capable of the laminate of opposite sliding to overlap with 2~4, the lower edge of any laminate is resisted against the arc drain pulp
The first mouth spray is in close state when flowing pulpboard, and multi-layer sealed by the realization of each laminate, and each laminate is away from arc drain pulp
The first mouth spray is in the open state when flowing pulpboard, adjusts shape by the spacing adjusted between each laminate and arc drain pulp stream pulpboard
At curtain stream flow or thickness degree.
In further technical solution, squeezed in step after described, rear press section is provided with 3~5 groups of high pressure pressure roller
Group and 3~5 groups of low-pressures squeeze roller group, and low-pressure squeezing roller group is provided between two neighboring high pressure squeezing roller group.
After adopting the above technical scheme, the invention has the following advantages that
First, the present invention is recycled sludge and produces brown paper, and paper mill sludge is made to be regenerated use, and produce and clean,
Pollution-free, production technology is more energy-saving and environmentally friendly, in the paper making process by gunnite method using sludge slurry as in brown paper
Interbed, new production technology not but not reduce the quality of finished product brown paper that production obtains, and are able to ascend finished product ox-hide instead
The intensity and toughness of paper.
Second, the present invention makes waste paper pulp reduce 30~40%, and the processing cost of sludge is lower than the cost of waste paper pulp,
It solves to reduce production cost while sludge problem, effectively solves the problems, such as the sludge treatment in paper mill.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the first spray head of the invention.
Fig. 2 is the schematic cross-section of the first spray head of the invention.
Specific embodiment
As described below is only presently preferred embodiments of the present invention, is not intended to limit the scope of the present invention.
Embodiment one
The method for recycling paper mill sludge production high-strength cow paper, comprising the following steps:
1) waste paper pulp pulping stage passes through pulper pulping using the waste paper or litter decoration of recycling, then sequentially through height
After dense slug removing step, coarse screening step, low dense slug removing step, fine screening step and concentration step, the waste paper of suitable papermaking is made
The slurry concentration of slurry, waste paper pulp is controlled 4~5%；
2) leather of recycling is passed through pulper pulping by leather fiber slurry pulping stage, then sequentially through highly concentrated slagging-off
After step, coarse screening step, low dense slug removing step, fine screening step and concentration step, the leather fiber slurry of suitable papermaking is made
The slurry concentration of material, leather fiber slurry is controlled 8~10%；
3) sludge slurry pulping stage, including following sub-step,
3.1) it is classified filters pressing sub-step, conveyance conduit will be entered from paper waste every the sludge pumping that slag obtains, will conveyed
Pipeline is respectively connected to thick filter press and second level filter press, and the moisture content of sludge is reduced to 70~80% in thick filter press, is made
The moisture content of sludge is reduced to 55~65% in second level filter press, makes the further volume reduction of sludge, pasted by the preliminary volume reduction of sludge
Shape sludge, the clear liquid pumped back waste water station processing that filters pressing generates, by sludge transporting pipeline by paste sludge pumping to twin-screw
Extruder；
3.2) squeeze pretreatment sub-step, the middle section of sludge transporting pipeline several positions respectively to sludge transporting pipeline
Injection liquid mould release and the high-pressure hot air that temperature is 80~90 DEG C, pressure is 1.5~2MPa, high-pressure hot air are radially square
To being injected into sludge transporting pipeline, makes the fiber and impurity loose in paste sludge, avoid sludge in subsequent extruding
It is condensed into blocks in step；
Wherein, it is natural boiled wood oil 40~50%, water-soluble colophony powder 20 that liquid mould release, which is by weight percent,
~30%, furfural 5~10% and water surplus are stirred, and make natural boiled wood oil, water-soluble colophony powder and furfural phase
It is molten and form oily emulsion；
3.3) extrusion dehydration and inactivation sub-step are squeezed after paste sludge pumping to twin (double) screw extruder by twin-screw
Two screw rods of press are pushed, and so that paste sludge is moved ahead in barrel, while the heating device for controlling barrel middle section is heated,
The temperature of the inside in barrel middle section is set to keep control at 200~220 DEG C,
Two screw flight density of twin (double) screw extruder are respectively designed to density interphase, if along direction of advance formation
Dry interleaved height squeezes volume segments and low extruding volume segments, and so that paste sludge is sequentially passed through the high of interleaved and squeeze volume
Section and low extruding volume segments are injected separately into temperature in each low extruding volume segments and are slightly above low extruding appearance for 110~120 DEG C, pressure
The high-pressure hot air of the interior pressure of product section, by the way that each high outside dispatch high steam of pressure filter for squeezing volume segments is arranged in, and
High steam pumped back waste water station is recycled into heat and purified treatment, while paste sludge pressure being avoided to form real block,
Make paste sludge in twin (double) screw extruder by extrusion process several times by a loosening and a tightening, paste sludge is squeezing
Dehydration is by cell breath several times, and moisture content, impurity and ink in the form of high steam in exclusion paste sludge,
Bacterium, microorganism and the organic matter being present in paste sludge are killed in barrel simultaneously；
3.4) sludge squeezes out sub-step, is squeezed out by twin (double) screw extruder, obtains clean hygienic sludge；
3.5) leather fiber slurry and hygienic sludge are delivered to simultaneously by the weight ratio of 1:5~6 and are stirred by sub-step with slurry
Station is mixed, is stirred evenly, viscous force is quantitatively continuously conveyed to mixing plant by metering pump in whipping process and promotes lotion, viscous force is promoted
The weight ratio of lotion and hygienic sludge is 1:80~90, and whipping process is dispersed to staple fiber and long fibre in hygienic sludge
Between the animal origin of leather fiber slurry, emulsion dispersion and the surface for being attached to staple fiber, long fibre and animal origin are obtained
Sludge centrotheca,
Wherein, viscous force promoted lotion be by weight percent be Heveatex 40~50%, natural rubber powder 30~40%,
Petroleum ether surplus is stirred, and Heveatex, natural rubber powder and petroleum ether is made to mix and form lotion；
3.6) sludge centrotheca is delivered to paste mill grinding by sludge defibrination sub-step, and the grinding flute profile selection of fiberizer is swept
Broom fin, defibrination process make staple fiber, long fibre and animal origin surface fluff rapidly, and the surface of animal origin rises and becomes mildewed, and grinds
Slurry process makes the hair side of staple fiber, long fibre and animal origin be attached with lotion simultaneously, after defibrination lotion make staple fiber
It is bonded in animal origin respectively with long fibre, and free lotion forms the internal molecule for being enclosed with mud, is had
The slurry concentration of the sludge slurry of composite fibre, sludge slurry is controlled 8~10%；
4) wet end is manufactured paper with pulp and whitewashes step of manufacturing paper with pulp, including following sub-step,
4.1) waste paper pulp, which is manufactured paper with pulp, forms sub-step, waste paper pulp is pumped in pond of manufacturing paper with pulp, by wet end in pond of manufacturing paper with pulp
In molding of manufacturing paper with pulp obtain the first secondary stock bed of material；
4.2) the first whitewashing is manufactured paper with pulp sub-step, and sludge slurry is pumped to the first whitewashing and is manufactured paper with pulp the first whitewashing pond in portion, net
Portion manufacture paper with pulp to obtain manufactured paper with pulp after the first secondary stock bed of material from the first whitewashing portion the first spray head below average rate pass through, the first spray head
The first linear mouth spray with width slightly larger than wet end, the first spray head pump sludge slurry from the first whitewashing pond, and
The sludge slurry for being linked to be sheet is uniformly sprayed towards wet end by the first mouth spray, forms one on the surface of the first secondary stock bed of material
Sludge pulp layer；
4.3) the second whitewashing is manufactured paper with pulp sub-step, and waste paper pulp is pumped to the second whitewashing and manufactures paper with pulp the first whitewashing pond in portion, wet end
Manufacture paper with pulp to obtain manufactured paper with pulp after sludge slurry from the second whitewashing portion the second spray head below average rate pass through, the second spray head has width
Slightly larger than the second linear mouth spray of wet end, the second spray head pumps waste paper pulp from the second whitewashing pond, and passes through second
Mouth spray uniformly sprays the waste paper pulp for being linked to be sheet towards wet end, forms second secondary stock on the surface of sludge pulp layer
The bed of material forms compound pulp layer in wet end；
5) squeeze step after, compound pulp layer be delivered to rear press section press and is dehydrated, compound pulp layer rear press section sequentially
Roller group is squeezed by the spaced high pressure of several groups and low-pressure squeezes roller group, makes compound pulp layer using several times one pine
One tight expressing process, improved while improving dehydration rate the first secondary stock bed of material in compound pulp layer, sludge pulp layer with
Affinity and cohesive force between the second secondary stock bed of material, and moisture content is reduced to 40% or less；
6) the compound pulp layer Jing Guo press section press is sequentially delivered to the drying of drying cylinder portion by subsequent papermaking procedure, surface is applied
Glue machine top sizing, rear drying cylinder portion are dry；
7) finished product obtains brown paper after winding.
Embodiment two
Recycle the method that paper mill sludge produces high-strength cow paper, technological parameter and implementation in key step and step
Example one is identical, and which is not described herein again, the difference is that, comprising the following steps:
1) waste paper pulp pulping stage；
2) leather fiber slurry pulping stage；
3) sludge slurry pulping stage, including following sub-step,
3.1) it is classified filters pressing sub-step,；
3.2) squeeze pretreatment sub-step, wherein liquid mould release be by weight percent natural boiled wood oil 46~
48%, water-soluble colophony powder 26~28%, furfural 8~9% and water surplus are stirred, and make natural boiled wood oil, day
Right water-soluble rosin powder and furfural mix and form oily emulsion；
3.3) extrusion dehydration and inactivation sub-step make the width of the screw thread of twin-screw from interior to gradually becoming smaller outside, and screw thread
Side is arc-shaped, and controls the tilt angle of each screw thread at 15~20 degree, and each screw thread is made to have anti-stick and self-cleaning ability；
Height squeezes the flight pitch control of volume segments in 8~10cm, the control of volume compression ratio 0.5~0.6, the low volume segments that squeeze
Flight pitch control is in 12~15cm, the control of volume compression ratio 0.8~0.9；In each low high pressure for squeezing volume segments injection
Hygroscopic agent is mixed in hot-air；Make paste sludge using 15~20 cell breaths；
3.4) sludge squeezes out sub-step；
3.5) sub-step with slurry, it is Heveatex 41~43%, natural rubber that viscous force promotion lotion, which is by weight percent,
Powder 32~34%, petroleum ether surplus are stirred, and Heveatex, natural rubber powder and petroleum ether is made to mix and form lotion；
3.6) sludge defibrination sub-step, the fin tine length of broom fin is 1~2cm, width is 0.5~1cm, tooth pitch 0.3
~0.5cm, is enclosed with the average grain diameter control of the molecule of mud in 0.1~0.2mm, after defibrination lotion make
Staple fiber and long fibre are bonded in animal origin respectively and form several netted thin fiber web layers not of uniform size, and each
The fiber number of plies having in thin fiber web layer is 5~10 layers, and the maximum mean breadth of thin fiber web layer is 5~8cm, is used for
Percolation ratio when wet end is manufactured paper with pulp is reduced, while promoting shaping strength；
4) wet end is manufactured paper with pulp and whitewashes step of manufacturing paper with pulp, including following sub-step,
4.1) waste paper pulp, which is manufactured paper with pulp, forms sub-step；
4.10) light for the first time to squeeze sub-step, make wet end by the first light press section, the first secondary stock bed of material is carried out slight
Squeezing, squeeze pressure are controlled in 0.1~0.2MPa, form the first secondary stock bed of material tentatively；
4.2) the first whitewashing is manufactured paper with pulp sub-step, and the top of the first spray head is provided with storage slurry room 1, and the width of storage slurry room 1 omits
Greater than the width of wet end, be arranged on the top of storage slurry room 1 or side into slurry interface 2, by into slurry interface 2 by the first whitewashing pond
Sludge slurry is pumped in storage slurry room 1, and the lower part of the first spray head, the width of the first mouth spray and storage is arranged in the first mouth spray
The of same size of room 1 is starched, in 0.5~3mm, the bottom of storage slurry room 1 is provided with for close for the opened gap control of the first mouth spray
Envelope and the seal cover board 4 for opening the first mouth spray shown in Fig. 1 and 2, after the first mouth spray is in the open state, make storage slurry room 1
Interior sludge slurry is flowed downward out and is joined together by the first mouth spray；
Wherein, an arc drain pulp stream pulpboard 3, storage slurry are extended towards second side bending in the first side of the lower part of storage slurry room 1
Second side of the lower part of room 1 is provided with striker plate, and the outer end edges of striker plate extend to 3 middle part of arc drain pulp stream pulpboard, backgauge
A spillage gap is formed between the outer end edges of plate and the plate face of arc drain pulp stream pulpboard 3, the both ends in spillage gap each extend over
To the both ends of storage slurry room 1, spillage gap forms first mouth spray, and the outer end edges of arc drain pulp stream pulpboard 3 form
The back side of spillage face, spillage face and arc drain pulp stream pulpboard 3 forms an acute angle, and the outer end in spillage face and arc drain pulp stream are starched
The back side of plate 3 intersects a linear type edge of a knife, and the linear type edge of a knife makes sludge slurry form planar curtain stream when dirty；
A seal cover board 4 is slidably fitted on the outside of striker plate, seal cover board 4 has 2~4 weights for capableing of opposite sliding
The laminate 40 stacked, when the lower edge of any laminate 40 is resisted against the arc drain pulp stream pulpboard 3 at first mouth spray
In closed state, and multi-layer sealed, the first whitewashing when each laminate 40 is away from arc drain pulp stream pulpboard 3 is realized by each laminate 40
Mouth is in the open state, adjusts the curtain stream to be formed by adjusting the spacing between each laminate 40 and arc drain pulp stream pulpboard 3
Flow or thickness degree；
4.20) second light to squeeze sub-step, make wet end by the second light press section, to the first secondary stock bed of material and sludge slurry
The bed of material is slightly squeezed, squeeze pressure control in 0.1~0.2MPa, make the first secondary stock bed of material and sludge pulp layer tentatively at
Type；
4.3) the second whitewashing is manufactured paper with pulp sub-step, structure and gunnite method and the first spray head phase of second spray head
Together；
4.30) third time is light squeezes sub-step, makes wet end by the light press section of third, to the first secondary stock bed of material, sludge slurry
The bed of material and the second secondary stock bed of material are slightly squeezed, squeeze pressure control in 0.1~0.2MPa, make the first secondary stock bed of material,
Sludge pulp layer and the second secondary stock bed of material tentatively form；
5) step is squeezed after, rear press section is provided with 3~5 groups of high pressure squeezing roller groups and 3~5 groups of low-pressure pressure roller
Group, two neighboring high pressure squeeze and are provided with low-pressure squeezing roller group between roller group, and high pressure squeezes the pressure control of roller group
In 0.5~0.6MPa, the pressure that low-pressure squeezes roller group is controlled in 0.1~0.2MPa；
6) the compound pulp layer Jing Guo press section press is sequentially delivered to the drying of drying cylinder portion by subsequent papermaking procedure, surface is applied
Glue machine top sizing, rear drying cylinder portion are dry；
7) finished product obtains brown paper after winding.
The above is only a preferred embodiment of the present invention, for those of ordinary skill in the art, according to the present invention
Thought, there will be changes in the specific implementation manner and application range, and the content of the present specification should not be construed as to the present invention
Limitation.
Claims (7)
1. the method for recycling paper mill sludge production high-strength cow paper, which comprises the following steps:
1) waste paper pulp pulping stage passes through pulper pulping using the waste paper or litter decoration of recycling, then removes sequentially through highly concentrated
After slag step, coarse screening step, low dense slug removing step, fine screening step and concentration step, the waste paper pulp of suitable papermaking is made,
The slurry concentration of waste paper pulp is controlled 4~5%；
2) leather fiber slurry pulping stage, by the leather of recycling pass through pulper pulping, then sequentially through highly concentrated slug removing step,
After coarse screening step, low dense slug removing step, fine screening step and concentration step, the leather fiber slurry of suitable papermaking, skin is made
The slurry concentration for removing from office fibre stuff is controlled 8~10%；
3) sludge slurry pulping stage, including following sub-step,
3.1) it is classified filters pressing sub-step, conveyance conduit will be entered from paper waste every the sludge pumping that slag obtains, by conveyance conduit
It is respectively connected to thick filter press and second level filter press, the moisture content of sludge is reduced to 70~80% in thick filter press, makes sludge
The moisture content of sludge is reduced to 55~65% in second level filter press, makes the further volume reduction of sludge by preliminary volume reduction, obtains paste dirt
Mud, the clear liquid pumped back waste water station processing that filters pressing generates, by sludge transporting pipeline by paste sludge pumping to twin-screw extruder
Machine；
3.2) pretreatment sub-step is squeezed, is injected respectively to sludge transporting pipeline in several positions in the middle section of sludge transporting pipeline
The high-pressure hot air that liquid mould release and temperature are 80~90 DEG C, pressure is 1.5~2MPa, high-pressure hot air are radially sprayed
It injects in sludge transporting pipeline, makes the fiber and impurity loose in paste sludge, avoid sludge in subsequent pressing steps
In be condensed into blocks；Wherein, it is natural boiled wood oil 40~50%, water-soluble colophony powder that liquid mould release, which is by weight percent,
20~30%, furfural 5~10% and water surplus are stirred, and make natural boiled wood oil, water-soluble colophony powder and furfural
It mixes and forms oily emulsion；
3.3) extrusion dehydration and inactivation sub-step pass through twin (double) screw extruder after paste sludge pumping to twin (double) screw extruder
Two screw rods push, so that paste sludge is moved ahead in barrel, while the heating device for controlling barrel middle section is heated, and makes to expect
The temperature of the inside in cylinder middle section keeps control at 200~220 DEG C, and two screw flight density of twin (double) screw extruder are distinguished
It is designed to density interphase, forms several interleaved height along direction of advance and squeeze volume segments and low extruding volume segments, and make paste
Sludge sequentially passes through the high of interleaved and squeezes volume segments and low extruding volume segments, is injected separately into temperature in each low extruding volume segments
It is higher than the high-pressure hot air of the low interior pressure for squeezing volume segments for 110~120 DEG C, pressure, by setting in each high extruding volume
The outside dispatch high steam of pressure filter of section, and high steam pumped back waste water station is recycled into heat and purified treatment, it keeps away simultaneously
Exempt from paste sludge pressure and form real block,
Make paste sludge in twin (double) screw extruder by extrusion process several times by a loosening and a tightening, paste sludge is in extrusion dehydration
Process is by cell breath several times, and moisture content, impurity and ink in the form of high steam in exclusion paste sludge, simultaneously
Bacterium, microorganism and the organic matter being present in paste sludge are killed in barrel；
3.4) sludge squeezes out sub-step, is squeezed out by twin (double) screw extruder, obtains clean hygienic sludge；
3.5) leather fiber slurry and hygienic sludge are delivered to stirring by the weight ratio of 1:5~6 by sub-step with slurry simultaneously
It stands, stirs evenly, viscous force is quantitatively continuously conveyed to mixing plant by metering pump in whipping process and promotes lotion, viscous force promotes cream
The weight ratio of liquid and hygienic sludge is 1:80~90, and whipping process makes staple fiber and long fibre in hygienic sludge be dispersed to skin
Between the animal origin for removing from office fibre stuff, emulsion dispersion and the surface for being attached to staple fiber, long fibre and animal origin obtain dirt
Mud centrotheca,
Wherein, it is Heveatex 40~50%, natural rubber powder 30~40%, petroleum that viscous force promotion lotion, which is by weight percent,
Ether surplus is stirred, and Heveatex, natural rubber powder and petroleum ether is made to mix and form lotion；
3.6) sludge centrotheca is delivered to paste mill grinding by sludge defibrination sub-step, and the grinding flute profile of fiberizer selects broom fin,
Defibrination process makes staple fiber, long fibre and animal origin surface fluff rapidly, and the surface of animal origin rises and becomes mildewed, defibrination process
So that the hair side of staple fiber, long fibre and animal origin is attached with lotion simultaneously, after defibrination lotion make staple fiber and long fine
Dimension is bonded in animal origin respectively, and free lotion forms the internal molecule for being enclosed with mud, obtains having compound fibre
The slurry concentration of the sludge slurry of dimension, sludge slurry is controlled 8~10%；
4) wet end is manufactured paper with pulp and whitewashes step of manufacturing paper with pulp, including following sub-step,
4.1) waste paper pulp, which is manufactured paper with pulp, forms sub-step, waste paper pulp is pumped in pond of manufacturing paper with pulp, and is copied in pond of manufacturing paper with pulp by wet end
Type is caused to obtain the first secondary stock bed of material；
4.2) the first whitewashing is manufactured paper with pulp sub-step, and sludge slurry is pumped to the first whitewashing and is manufactured paper with pulp the first whitewashing pond in portion, and wet end is copied
Make to obtain manufactured paper with pulp after the first secondary stock bed of material from the first whitewashing portion the first spray head below average rate pass through, the first spray head has
Width is greater than the first linear mouth spray of wet end, and the first spray head pumps sludge slurry from the first whitewashing pond, and passes through the
One mouth spray uniformly sprays the sludge slurry for being linked to be sheet towards wet end, forms a sludge slurry on the surface of the first secondary stock bed of material
The bed of material；
4.3) the second whitewashing is manufactured paper with pulp sub-step, and waste paper pulp is pumped to the second whitewashing and manufactures paper with pulp the first whitewashing pond in portion, and wet end is manufactured paper with pulp
The the second spray head lower section average rate for obtaining whitewashing the portion that manufactures paper with pulp from second after sludge slurry passes through, and the second spray head is greater than with width
The second linear mouth spray of wet end, the second spray head pumps waste paper pulp from the second whitewashing pond, and passes through the second mouth spray
The waste paper pulp for being linked to be sheet is uniformly sprayed towards wet end, forms a second secondary stock bed of material on the surface of sludge pulp layer,
Compound pulp layer is formed in wet end；
5) step is squeezed after, and compound pulp layer is delivered to rear press section press and is dehydrated, compound pulp layer is sequentially passed through in rear press section
The spaced high pressure squeezing roller group of several groups and low-pressure squeeze roller group, and the pressure that high pressure squeezes roller group is controlled 0.5
~0.6MPa, low-pressure squeeze the pressure control of roller group in 0.1~0.2MPa, make compound pulp layer using several times by a loosening and a tightening
Expressing process, the first secondary stock bed of material, the sludge pulp layer and second in compound pulp layer are improved while improving dehydration rate
Affinity and cohesive force between the secondary stock bed of material, and moisture content is reduced to 40% or less；
6) the compound pulp layer Jing Guo press section press is sequentially delivered to the drying of drying cylinder portion, surface size press by subsequent papermaking procedure
Top sizing, rear drying cylinder portion are dry；
7) finished product obtains brown paper after winding.
2. the method for recycling paper mill sludge production high-strength cow paper according to claim 1, it is characterised in that: described to squeeze
In press-dehydrating and inactivation sub-step, make the width of the screw thread of twin-screw from interior to gradually becoming smaller outside, and screw thread side is arc-shaped, and
It controls the tilt angle of each screw thread at 15~20 degree, makes each screw thread that there is anti-stick and self-cleaning ability；Height squeezes volume segments
Flight pitch control in 8~10cm, the control of volume compression ratio 0.5~0.6, the low flight pitch control for squeezing volume segments
In 12~15cm, the control of volume compression ratio 0.8~0.9；It is mixed in each low high-pressure hot air for squeezing volume segments injection
There is hygroscopic agent；Make paste sludge using 15~20 cell breaths.
3. the method for recycling paper mill sludge production high-strength cow paper according to claim 2, it is characterised in that: the dirt
In mud defibrination sub-step, the fin tine length of the broom fin is 1~2cm, width is 0.5~1cm, tooth pitch is 0.3~0.5cm,
The average grain diameter control of the molecule of mud is enclosed in 0.1~0.2mm, after defibrination lotion make staple fiber and
Long fibre is bonded in animal origin respectively and forms several netted thin fiber web layers not of uniform size, and each slim fiber
The fiber number of plies having in stratum reticulare is 5~10 layers, and the maximum mean breadth of thin fiber web layer is 5~8cm, for reducing wet end
Percolation ratio when manufacturing paper with pulp, while promoting shaping strength.
4. the method for recycling paper mill sludge production high-strength cow paper according to claim 3, it is characterised in that: wet end is copied
It makes and whitewashes step of manufacturing paper with pulp, including following sub-step,
4.1) waste paper pulp, which is manufactured paper with pulp, forms sub-step；
4.10) light for the first time to squeeze sub-step, make wet end by the first light press section, the first secondary stock bed of material is slightly pressed
It squeezes, squeeze pressure is controlled in 0.1~0.2MPa, forms the first secondary stock bed of material tentatively；
4.2) the first whitewashing is manufactured paper with pulp sub-step；The top of first spray head is provided with storage slurry room, and the width of storage slurry room is greater than wet end
Width, storage slurry room top or side be arranged into slurry interface, by into slurry interface by first whitewashing pond sludge mashing pump
It send into storage slurry room, the lower part of the first spray head, the width of the first mouth spray and the width of storage slurry room is arranged in the first mouth spray
Identical, in 0.5~3mm, the bottom of storage slurry room is provided with for sealing and opening first for the opened gap control of the first mouth spray
The seal cover board of mouth spray makes storage starch indoor sludge slurry and passes through the first whitewashing after the first mouth spray is in the open state
Mouth is flowed downward out and is joined together；
4.20) second light to squeeze sub-step, make wet end by the second light press section, to the first secondary stock bed of material and sludge pulp layer
It is slightly squeezed, squeeze pressure is controlled in 0.1~0.2MPa, forms the first secondary stock bed of material and sludge pulp layer tentatively；
4.3) the second whitewashing is manufactured paper with pulp sub-step, and the structure and gunnite method of second spray head are identical as the first spray head；
4.30) third time is light squeezes sub-step, makes wet end by the light press section of third, to the first secondary stock bed of material, sludge pulp layer
It is slightly squeezed with the second secondary stock bed of material, squeeze pressure is controlled in 0.1~0.2MPa, makes the first secondary stock bed of material, sludge
Pulp layer and the second secondary stock bed of material tentatively form.
5. the method for recycling paper mill sludge production high-strength cow paper according to claim 4, it is characterised in that: described the
One whitewashing is manufactured paper with pulp in sub-step, and arc drain pulp stream slurry is extended towards second side bending in the first side of the lower part of storage slurry room
Second side of plate, the lower part of storage slurry room is provided with striker plate, and the outer end edges of striker plate extend in the middle part of arc drain pulp stream pulpboard,
A spillage gap is formed between the outer end edges of striker plate and the plate face of arc drain pulp stream pulpboard, the both ends in spillage gap are prolonged respectively
The both ends of storage slurry room are reached, spillage gap forms first mouth spray, and the outer end edges of arc drain pulp stream pulpboard form
The back side of spillage face, spillage face and arc drain pulp stream pulpboard forms an acute angle, and the outer end in spillage face and arc drain pulp stream are starched
The back side of plate intersects a linear type edge of a knife, and the linear type edge of a knife makes sludge slurry form planar curtain stream when dirty.
6. the method for recycling paper mill sludge production high-strength cow paper according to claim 5, it is characterised in that: the gear
A seal cover board is slidably fitted on the outside of flitch, there are seal cover board 2~4 to be capable of overlaping for opposite sliding
Laminate, the first mouth spray is in close state when the lower edge of any laminate is resisted against the arc drain pulp stream pulpboard, and
Multi-layer sealed by the realization of each laminate, the first mouth spray is in the open state when each laminate is away from arc drain pulp stream pulpboard, leads to
Overregulate flow or thickness degree that the spacing between each laminate and arc drain pulp stream pulpboard adjusts the curtain stream to be formed.
7. the method for recycling paper mill sludge production high-strength cow paper according to claim 6, it is characterised in that: after described
It squeezes in step, rear press section is provided with 3~5 groups of high pressure squeezing roller groups and 3~5 groups of low-pressure squeezing roller groups, two neighboring
Low-pressure squeezing roller group is provided between high pressure squeezing roller group.
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| CN113463428A (en) * | 2021-07-12 | 2021-10-01 | 东莞顺裕纸业有限公司 | Production method of waste paper reconstructed corrugated medium paper for reducing sludge and sewage coarse treatment time |
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