CN216947631U

CN216947631U - Pulping, pulp distribution and flow conveying system for corrugated paper

Info

Publication number: CN216947631U
Application number: CN202122864844.9U
Authority: CN
Inventors: 卢耀权; 张锦坤; 陈太军
Original assignee: Sichuan Jintian Paper Co ltd
Current assignee: Sichuan Jintian Paper Co ltd
Priority date: 2021-11-22
Filing date: 2021-11-22
Publication date: 2022-07-12
Anticipated expiration: 2031-11-22

Abstract

A pulping, pulp distribution and flow conveying system for corrugated paper relates to the technical field of papermaking, and adopts the technical scheme that the pulping system comprises a pulping system, a coarse screening system, a screening and purifying system, a pulp distribution and flow conveying system, a white water recovery system and a slag pulp treatment system, wherein the pulping system comprises a hydrapulper, a high-concentration desander and a discharge pulp tank; the coarse screening system comprises a section of coarse screen, a coarse screening fine pulp tank, a medium-concentration desander and a medium-concentration fine pulp tank; the screening and purifying system comprises a grading screen, a long fiber vertical pipe, a long fiber desander, a first-stage fine screen, a long fiber multi-disc thickener, a long fiber pulp tank, a long fiber pulp tower, a long fiber pre-grinding tank, a long fiber pulp grinder, a long fiber post-grinding tank, a short fiber vertical pipe, a short fiber desander, a short fiber multi-disc thickener, a short fiber pulp tank and a short fiber pulp tower; the slurry distribution and flow passing system comprises a slurry distribution tank, a slurry forming tank, a section of pressure screen, a pulse buffer tank, a head box, a forming part and a pressing part. The utility model carries out multi-stage impurity removal treatment on the waste paper, has good treatment effect and improves the utilization rate of the waste paper.

Description

Pulping of corrugated paper is joined in marriage thick liquid and is flowed system

Technical Field

The utility model relates to the technical field of papermaking, in particular to a pulp making, distributing and drifting system for corrugated paper.

Background

As is well known, the paper making industry faces three problems of raw material shortage, energy crisis and serious pollution, and the recycling of waste paper has double values of ecology and economy and can bring considerable economic benefits for paper making enterprises. The paper making enterprise can make paper again by about 800 kg per 1000 kg of waste paper recovered, which is equivalent to saving 3 cubic meters of wood, 1.2 tons of coal, 100 tons of water, 300 kg of chemical raw materials and 600 degrees of electricity. But the waste paper contains various impurities, and if the impurities are not thoroughly removed, the quality of the finally prepared pulp is influenced.

SUMMERY OF THE UTILITY MODEL

Aiming at the problem that the impurity removal of the waste paper is not thorough in the prior art scheme, the utility model provides a pulp making, pulp distributing and flowing system for corrugated paper.

The utility model provides the following technical scheme: a pulping, pulp distribution and flow conveying system for corrugated paper comprises a pulping system, a coarse screening system, a screening and purifying system, a pulp distribution and flow conveying system, a white water recovery system and a slag pulp treatment system, wherein the pulping system comprises a hydrapulper, a pulp outlet pipeline of the hydrapulper is connected with a high-concentration desander, and a good pulp pipeline of the high-concentration desander is connected with a discharging pulp tank; the coarse screening system comprises a section of coarse screen connected with the discharging slurry pool through a pipeline, an accept pipeline of the section of coarse screen is sequentially connected with a coarse screening accept tank and a medium-concentration desander, and an accept pipeline of the medium-concentration desander is connected with a medium-concentration accept tank; the screening and purifying system comprises a grading screen connected with the medium-concentration fine pulp tank through a pipeline, a long fiber outlet pipeline of the grading screen is sequentially connected with a long fiber vertical pipe and a long fiber desander, a fine pulp pipeline of the long fiber desander is connected with a section of fine screen, a fine pulp pipeline of the section of fine screen is sequentially connected with a long fiber multi-disc thickener, a long fiber pulp tank, a long fiber pulp tower, a long fiber pre-grinding pool, a long fiber pulp grinder and a long fiber post-grinding pool, a short fiber outlet pipeline of the grading screen is sequentially connected with a short fiber vertical pipe and a short fiber desander, and a fine pulp pipeline of the short fiber desander is sequentially connected with a short fiber multi-disc thickener, a short fiber pulp tank and a short fiber pulp tower; the pulp distribution and flow conveying system comprises a pulp distribution tank connected with the short fiber pulp tower and the long fiber ground tank through pipelines, the pulp distribution tank is sequentially connected with a pulp forming tank and a section of pressure screen, a good pulp pipeline of the section of pressure screen is sequentially connected with a pulse buffer tank, a pulp flowing box and a forming part, and a paper web outlet of the forming part is connected with a squeezing part.

Preferably, the pulping system further comprises a hydraulic slag removal machine connected with a light slag outlet of the hydraulic pulper, a good pulp pipeline of the hydraulic slag removal machine is sequentially connected with a pulping high-position box and a cylindrical screen, the good pulp pipeline of the cylindrical screen is connected to an inlet of the hydraulic pulper, a slag pulp pipeline of the high-concentration sand remover is connected to a pulping sand-water separator, a liquid outlet of the pulping sand-water separator is connected to an inlet of the hydraulic pulper, and slag pulp pipelines of the hydraulic slag removal machine, the cylindrical screen and the pulping sand-water separator are all connected to a waste slag recovery pool.

Preferably, the coarse screen system still include with one section riser of coarse screen of the sediment thick liquid pipe connection of one section coarse screen, one section riser of coarse screen has two sections coarse screens through pipe connection, the good thick liquid pipe connection of two sections coarse screens the coarse screen good pulp pond, the sediment thick liquid pipeline of two sections coarse screens has connected gradually coarse screen two sections risers, the defibrator, the good thick liquid pipe connection of defibrator has to one section riser of coarse screen, the sediment thick liquid pipeline of defibrator has connected gradually coarse screen overhead tank, row's sediment separating centrifuge, the good thick liquid pipeline of row's sediment separating centrifuge has connected gradually collecting pit, desander, the good thick liquid pipe connection of desander to hydrapulper, the sediment thick liquid pipeline of row's sediment separating centrifuge, desander all is connected to the waste residue recovery pond.

Preferably, the screening and purifying system further comprises a three-section desander connected with the slag and slurry pipelines of the short fiber desander and the long fiber desander, the good slurry pipeline of the three-section desander is connected to the long fiber vertical pipe, and the slag and slurry pipeline of the three-section desander is connected to the four-section desander; the good pulp pipeline of the four-section desander is connected to the three-section desander, and the good pulp pipeline of the four-section desander is connected to the five-section desander; the good slurry pipeline of the five-section desander is connected to the four-section desander, the residue slurry pipeline of the five-section desander is connected to the screening sand-water separator, the good slurry pipeline of the sand-water separator is connected to the six-section desander, and the residue slurry pipeline of the sand-water separator is connected to the waste residue recovery tank; the fine slurry pipeline of the six-section desander is connected to the fine screening slurry pool, and the slurry pipeline of the six-section desander is connected to the screening sand-water separator; the slag pulp pipeline of the first section of fine screen is sequentially connected to a first vertical pipe of the fine screen and a second section of fine screen, the good pulp pipeline of the second section of fine screen is connected to the long-fiber multi-disc thickener, the slag pulp pipeline of the second section of fine screen is sequentially connected to a second vertical pipe of the fine screen and the tailings screen, the good pulp pipeline of the tailings screen is connected to the first vertical pipe of the fine screen, and the slag pulp pipeline of the tailings screen is connected to the fine screen slag pulp tank.

Preferably, the sediment thick liquid processing system include with the shale shaker that fine screen sediment thick liquid pond passes through the pipe connection, the sediment thick liquid pipe connection of shale shaker is to hydrapulper, the good thick liquid pipeline of shale shaker has connected gradually sediment thick liquid pond, inclined wire thickener, storage thick liquid pond, sediment thick liquid high concentration desander, the good thick liquid pipeline of sediment thick liquid high concentration desander connect gradually the sediment thick liquid fiberizer the thick liquid pond of unloading, the sediment thick liquid pipe connection of sediment thick liquid high concentration desander to waste residue recovery pond.

Preferably, the slurry distribution flow conveying system further comprises a second-section pressure screen connected with a slurry pipeline of the first-section pressure screen, a good slurry pipeline of the second-section pressure screen is connected to the first-section pressure screen, and a slurry pipeline of the second-section pressure screen is sequentially connected to a slurry tank and a medium-concentration good slurry pool; the drainage pipes of the forming part are respectively connected to an outside white water tank and a wire white water tank, the outside white water tank is respectively connected to a dilution water screen, the two-stage pressure screen and the one-stage pressure screen through pipes, the drainage pipes of the dilution water screen are connected to the head box, and the overflow pipe of the outside white water tank is connected to the wire white water tank.

Preferably, the white water recovery system comprises a white water multi-disc thickener connected with the wire mesh white water pool and the pulp distribution pool through pipelines, a first water outlet pipeline of the white water multi-disc thickener is sequentially connected with the pulp recovery pool and the pulp distribution pool, a second water outlet pipeline of the white water multi-disc thickener is sequentially connected with the turbid white water pool and the white water tower, a third water outlet pipeline of the white water multi-disc thickener is connected with a clear water pool, and a fourth water outlet pipeline of the white water multi-disc thickener is sequentially connected with a super clear water pool, a super clear water filter and a filtered super clear water pool.

Preferably, the broke recovery system comprises a broke pulper, an excellent pulp pipeline of the broke pulper is sequentially connected to a broke tower and a broke high-concentration desander, the excellent pulp pipeline of the broke high-concentration desander is sequentially connected to a broke multi-disc thickener, a defibering machine and a medium-concentration excellent pulp tank, and a residue pulp pipeline of the broke high-concentration desander is connected to a waste residue recovery tank.

The utility model has the beneficial effects that: through slurrying, coarse screening, screening purification, joining in marriage thick liquid drifting system, carry out multistage edulcoration to waste paper and handle, have that the treatment effect is good, characteristics that production efficiency is high to set up multistage sediment thick liquid treatment facility, improved the comprehensive utilization ratio of waste paper, not only to environmental protection and protection resource meaning far away, to the healthy development of papermaking enterprise, also will play important effect to the papermaking industry moreover.

Drawings

FIG. 1 is a diagram of a device connection according to an embodiment of the present invention.

FIG. 2 is a plant connection diagram of one embodiment of a pulping system according to the utility model.

Fig. 3 is an equipment connection diagram of one embodiment of the coarse screening system of the present invention.

FIG. 4 is a diagram of the equipment connections of one embodiment of the screening purification system of the present invention.

FIG. 5 is an equipment connection diagram of an embodiment of the slurry treatment system of the present invention.

Fig. 6 is a diagram of equipment connections for an embodiment of the slurry distribution flow system of the present invention.

Fig. 7 is a schematic diagram of the equipment connection of an embodiment of the whitewater recovery system of the present invention.

Reference numerals: 1-waste paper raw material, 2-hydrapulper, 3-high concentration desander, 4-discharge pulp tank, 5-section coarse screen, 6-coarse screen pulp tank, 7-medium concentration desander, 8-medium concentration pulp tank, 9-classifying screen, 10-long fiber vertical pipe, 11-long fiber desander, 12-section fine screen, 13-long fiber multi-disc concentrator, 14-long fiber pulp tank, 15-long fiber pulp tower, 16-long fiber pre-milling tank, 17-long fiber milling tank, 18-long fiber post-milling tank, 19-short fiber vertical pipe, 20-short fiber desander, 21-short fiber multi-disc concentrator, 22-short fiber pulp tank, 23-short fiber pulp tower, 24-pulp proportioning tank, 25-pulp-making tank, 26-section pressure screen, 27-pulse buffer tank, 28-head box, 29-forming section, 30-press section, 201-hydraulic slag remover, 202-pulping head box, 203-cylindrical screen, 204-pulping sand-water separator, 301-coarse screen first riser, 302-second coarse screen, 303-coarse screen second riser, 304-fiber separator, 305-coarse screen head box, 306-slag discharging separator, 307-collecting tank, 308-desander, 401-three section desander, 402-four section desander, 403-five section desander, 404-screening sand-water separator, 405-six section desander, 406-fine screen first riser, 407-second section fine screen, 408-fine screen second riser, 409-tail slag screen, 410-fine screen slag tank, 501-second section pressure screen, 502-slag trough, 503-a dilution water screen, 504-an outside white water tank, 505-a wire white water tank, 506-a broke pulper, 507-a broke tower, 508-a high-concentration broke desander, 509-a multi-disc broke thickener, 510-a fluffer, 601-a multi-disc white water thickener, 602-a recovery pulp tank, 603-a turbid white water tank, 604-a white water tower, 605-a white water tank, 606-an ultra-clear water tank, 607-an ultra-clear water filter, 608-a post-filtration ultra-clear water tank, 701-a vibrating screen, 702-a slag pulp tank, 703-an inclined wire thickener, 704-a pulp storage tank, 705-a high-concentration slag pulp desander and 706-a slag pulp refiner.

Detailed Description

The embodiments of the present invention will be described in more detail with reference to the accompanying drawings and reference numerals, so that those skilled in the art can implement the embodiments of the present invention after studying the specification. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

The utility model provides a pulping, pulp distributing and flow conveying system for corrugated paper, which comprises a pulping system, a coarse screening system, a screening and purifying system and a pulp distributing and flow conveying system, wherein the pulping, pulp distributing and flow conveying system is shown in figure 1. The pulping system is used for mixing and smashing waste paper raw materials 1 such as books, magazines, old newspapers and the like with water to form pulp, and specifically, the pulping system comprises a hydrapulper 2, a paper pulp outlet pipeline of the hydrapulper 2 is connected with a high-concentration desander 3, and a good pulp pipeline of the high-concentration desander 3 is connected with a discharging pulp pond 4. The hydrapulper 2 is used for pulping the waste paper raw material 1 into pulp, the high-concentration desander 3 is used for preliminarily removing impurities with larger particle sizes in the paper pulp, and the fine pulp obtained after the impurities are removed enters the discharging pulp pool 4 for buffering.

The coarse screen system is used for removing impurities with larger granularity in the paper pulp. The coarse screening system comprises a section of coarse screening 5, a coarse screening fine pulp pool 6 and a medium concentration desander 7 which are sequentially connected with the discharging pulp pool 4 through pipelines, wherein a fine pulp pipeline of the section of coarse screening 5 is connected to the coarse screening fine pulp pool 6, and a fine pulp pipeline of the medium concentration desander 7 is connected with a medium concentration fine pulp pool 8. The grading granularity of the first-stage coarse screen 5 is larger than that of the medium-concentration desander 7.

The screening and purifying system is used for classifying the paper pulp into two parts of long fiber pulp and short fiber pulp and further removing impurities from the two parts of pulp respectively. The screening and purifying system comprises a classifying screen 9 connected with a medium-consistency good pulp tank 8 through a pipeline, a long fiber outlet pipeline of the classifying screen 9 is sequentially connected with a long fiber vertical pipe 10 and a long fiber desander 11, a good pulp pipeline of the long fiber desander 11 is connected with a section of fine screen 12, and a good pulp pipeline of the section of fine screen 12 is sequentially connected with a long fiber multi-disc thickener 13, a long fiber pulp tank 14, a long fiber pulp tower 15, a long fiber pre-grinding tank 16, a long fiber pulp grinder 17 and a long fiber post-grinding tank 18; the short fiber outlet pipeline of the grading sieve 9 is sequentially connected with a short fiber vertical pipe 19 and a short fiber desander 20, and the good pulp pipeline of the short fiber desander 20 is sequentially connected with a short fiber multi-disc thickener 21, a short fiber pulp tank 22 and a short fiber pulp tower 23.

The classifying screen classifies the paper pulp from the medium-consistency stock tank into long fiber pulp and short fiber pulp by setting a proper screen gap size. The long fiber slurry enters a long fiber desander and a section of fine screen in sequence through a long fiber vertical pipe to remove impurities twice, then enters a long fiber multi-disc thickener to improve the concentration of the slurry, the high-concentration long fiber slurry is buffered in a long fiber slurry pool and then is conveyed to a long fiber slurry tower to be stored, when in use, the long fiber slurry is buffered in a long fiber pre-grinding pool and then is conveyed into a long fiber slurry grinder to be modified, and the modified long fiber slurry is buffered in a long fiber post-grinding pool. Short fiber slurry enters a short fiber desander through a short fiber vertical pipe to remove impurities, then enters a short fiber multi-disc thickener to improve the concentration of the slurry, and the high-concentration short fiber slurry is buffered in a short fiber slurry pool and then enters a short fiber slurry tower to be stored.

The paper pulp is fed into a paper machine through a pulp distribution flow system and is formed into a paper web by the paper machine. The slurry distribution flow system comprises a slurry distribution pool 24 connected with the short fiber slurry tower 23 and the long fiber post-milling pool 18 through pipelines; the stock preparation tank 24 is sequentially connected with a stock forming tank 25 and a section of pressure screen 26, a good stock pipeline of the section of pressure screen 26 is sequentially connected with a pulse buffer tank 27, a head box 28 and a forming part 29, and a paper web outlet of the forming part 29 is connected with a squeezing part 30.

Short fiber pulp in the short fiber pulp tower and long fiber pulp in the long fiber grinding tank can be conveyed to a pulp distribution tank according to a certain proportion for pulp distribution, then conveyed to a pulp forming tank to be uniformly mixed, and then enters a section of pressure screen for impurity removal, and then enters a pulse buffer tank for buffering, and then enters a pulp flowing box, a forming part and a squeezing part. The pulp flowing box uniformly distributes the pulp to ensure the pressure, the speed and the flow of the pulp entering the forming part; the forming and press sections are important components of a paper machine; the forming part is used for making paper pulp form the wet paper web to carry out preliminary dehydration to the wet paper web, the press part is used for carrying out mechanical press dehydration to the wet paper web, improves the dryness fraction and the intensity of wet paper web, forms the paper web semi-manufactured goods. Further, adding a No. 1 auxiliary agent during pulp preparation, adding a No. 2 auxiliary agent before the first section of pressure screen, and adding a No. 3 auxiliary agent after the first section of pressure screen to enhance the performance of the paper pulp; the No. 1 auxiliary agent can be gelatinized starch, dry strength agent and filler, and the No. 2 and No. 3 auxiliary agents can be retention agent or filter aid.

The white water recovery system is used for recovering white water generated in the papermaking process of the paper machine so as to reduce the total water consumption; the slag pulp treatment system is used for treating slag pulp in the screening and purifying process so as to improve the comprehensive utilization rate of waste paper. All the devices are connected through pipelines, and slurry flows in the pipelines automatically or is provided with conveying pressure through a slurry pump.

Preferably, the pulping system further comprises a hydraulic slag remover 201 connected with the light slag outlet of the hydrapulper 2, a good pulp pipeline of the hydraulic slag remover 201 is sequentially connected with a pulping high-position box 202 and a cylindrical screen 203, the good pulp pipeline of the cylindrical screen 203 is connected to the inlet of the hydrapulper 2, a slag pulp pipeline of the high-concentration sand remover 3 is connected to a pulping sand-water separator 204, a liquid outlet of the pulping sand-water separator 204 is connected to the inlet of the hydrapulper 2, and slag pulp pipelines of the hydraulic slag remover 201, the cylindrical screen 203 and the sand-water separator 204 are all connected to a waste residue recovery pond.

The light sludge discharged from the light sludge outlet of the hydrapulper and the sludge discharged from the high-consistency desander are mixed and accompanied by part of paper pulp, and the part of paper pulp needs to be recycled in order to improve the utilization rate of waste paper. The method is characterized in that a hydraulic slag cleaner is adopted to treat the light slag of the hydraulic pulper, the hydraulic slag cleaner is used for washing the light slag, the washed paper pulp enters a pulping high-level box, the pulping high-level box provides gravitational potential energy for the paper pulp to flow into a cylindrical screen automatically, the cylindrical screen removes impurities from the recycled paper pulp, and the good pulp after impurity removal returns to the hydraulic pulper through a pipeline. The pulping sand-water separator is a sand-water separator in a pulping system, the sand-water separator is adopted to further separate the residue slurry of the high-concentration desander, and the good slurry obtained by separation is returned to the hydrapulper. The residue slurry with most impurities separated by the hydraulic slag remover, the cylindrical screen and the pulping sand-water separator is conveyed to a waste residue recovery tank through a pipeline.

Preferably, the coarse screening system further comprises a first coarse screening vertical pipe 301 connected with a slag-slurry pipeline of the first coarse screening 5, the first coarse screening vertical pipe 301 is connected with a second coarse screening 302 through a pipeline, an improved-slurry pipeline of the second coarse screening 302 is connected with a coarse screening improved-slurry tank 6, a slag-slurry pipeline of the second coarse screening 302 is sequentially connected with a second coarse screening vertical pipe 303 and a fiber separator 304, an improved-slurry pipeline of the fiber separator 304 is connected with the first coarse screening vertical pipe 301, a slag-slurry pipeline of the fiber separator 304 is sequentially connected with a coarse screening high-position box 305 and a slag-discharging separator 306, an improved-slurry pipeline of the slag-discharging separator 306 is sequentially connected with a collecting tank 307 and a sand remover 308, the improved-slurry pipeline of the sand remover 308 is connected with the hydrapulper 2, and the slag-slurry pipelines of the slag-discharging separator 306 and the sand remover 308 are both connected with a waste slag-residue recovery tank.

The slag slurry of the first-stage coarse screen contains partial paper pulp, and in order to recover the paper pulp, the slag slurry of the first-stage coarse screen sequentially enters a first-stage vertical pipe of the coarse screen, a second-stage vertical pipe of the coarse screen, a fiber separator, a high-level box of the coarse screen, a slag discharge separator, a collecting tank and a desander for treatment, so that the fibers in the slag slurry are recovered as much as possible; the two-section coarse screen, the fiber separator, the slag discharge classifier and the desander are all classification equipment. The two-section coarse screen further grades the residue pulp of the one-section coarse screen, the graded good pulp returns to the coarse screen good pulp tank, and the residue pulp enters the fiber separator through the coarse screen two-section vertical pipe. The fiber separator can also untwist fibers in the paper pulp while grading, good pulp separated by the fiber separator returns to a section of vertical pipe of the coarse screen, and slag pulp enters the slag-discharging separator through the high-level box of the coarse screen. The slag-discharging separator is mainly used for grading, recovering fibers, discharging slag slurry and improving the concentration of the discharged slag slurry, the fibers recovered by the slag-discharging separator enter a collecting pool for buffering and then enter a desander for further impurity removal, and paper pulp subjected to impurity removal by the desander returns to a hydrapulper; the slag slurry with most impurities separated by the slag discharging separator and the desander is conveyed to a waste slag recovery tank through a pipeline.

Preferably, the screening and purifying system further comprises a three-section desander 401 connected with the slag-slurry pipelines of the short fiber desander 20 and the long fiber desander 11, the fine slurry pipeline of the three-section desander 401 is connected to the long fiber vertical pipe 10, and the slag-slurry pipeline of the three-section desander 401 is connected to the four-section desander 402; the accept line of the four-stage desander 402 is connected to the three-stage desander 401, and the accept line of the four-stage desander 402 is connected to the five-stage desander 403; the good pulp pipeline of the five-section desander 403 is connected to the four-section desander 402, the residue pulp pipeline of the five-section desander 403 is connected to the screening sand-water separator 404, the good pulp pipeline of the sand-water separator 404 is connected to the six-section desander 405, and the residue pulp pipeline of the sand-water separator 404 is connected to the waste residue recovery tank; the good pulp pipeline of the six-section desander 405 is connected to the fine screening slag pulp pool 410, and the slag pulp pipeline of the six-section desander 405 is connected to the screening sand water separator 404; the slag and pulp pipeline of the first section of fine screen 12 is sequentially connected to a first section of fine screen vertical pipe 406 and a second section of fine screen 407, the good pulp pipeline of the second section of fine screen 407 is connected to the long-fiber multi-disc thickener 13, the slag and pulp pipeline of the second section of fine screen 407 is sequentially connected to a second section of fine screen vertical pipe 408 and a tailings screen 409, the good pulp pipeline of the tailings screen 409 is connected to the first section of fine screen vertical pipe 406, and the slag and pulp pipeline of the tailings screen 409 is connected to a fine screen slag pulp tank 410.

In order to recover fibers in the slag slurry of the short fiber desander and the long fiber desander as much as possible, the slag slurry of the short fiber desander and the long fiber desander sequentially enters a three-section desander, a four-section desander, a five-section desander and a screening sand-water separator, the multistage desanders and the sand-water separator are all grading equipment, and the multistage desanders sequentially grade the slag slurry of the previous desander and recover the fibers in the slag slurry; the sand-water separator has high fiber recovery efficiency, and also has a slag slurry concentration effect, so that the concentration of the slag slurry discharged from the sand-water separator can be improved. Conveying the high-concentration slag slurry discharged by the sand-water separator to a waste residue recovery pool, and removing impurities in the good slurry in a six-section desander again; the slag slurry separated by the six-section desander returns to the sand-water separator to be discharged as much as possible, and the good slurry enters a fine screening slag slurry pool to wait for further treatment. In order to recover the fibers in the slag pulp discharged by the first-stage fine screen, the slag pulp discharged by the first-stage fine screen enters a second-stage fine screen through a first-stage vertical pipe of the fine screen for classification, the good pulp separated by the second-stage fine screen directly enters a long-fiber multi-disc thickener, and the slag pulp with most impurities enters a tailing screen through a second-stage vertical pipe of the fine screen for classification; the good pulp separated by the tailing screen returns to a section of vertical pipe of the fine screen, and the residue pulp enters a residue pulp tank of the fine screen.

Preferably, the slag pulp processing system comprises a vibrating screen 701 connected with a fine screening slag pulp tank 410 through a pipeline, a slag pulp pipeline of the vibrating screen 701 is connected to the hydrapulper 2, a good pulp pipeline of the vibrating screen 701 is sequentially connected with a slag pulp tank 702, an inclined wire thickener 703, a pulp storage tank 704 and a slag pulp high-concentration desander 705, a good pulp pipeline of the slag pulp high-concentration desander 705 is sequentially connected to a slag pulp refiner 706 and a discharging pulp tank 4, and a slag pulp pipeline of the slag pulp high-concentration desander 705 is connected to a waste residue recovery tank.

The pulp in the fine pulp chest also contains a portion of the fibers that need to be recycled. The method comprises the steps of inputting paper pulp in a selected pulp tank into a vibrating screen for classification, wherein the vibrating screen is higher in screening efficiency, returning the pulp with impurities separated by the vibrating screen to a hydrapulper, buffering the good pulp in the pulp tank, conveying the good pulp into an inclined-wire thickener to improve the concentration, buffering the pulp in a pulp storage tank, conveying the pulp to a high-concentration pulp desander for impurity removal, conveying the pulp separated by the high-concentration pulp desander to a waste residue recovery tank through a pipeline, and modifying the good pulp separated by the high-concentration pulp desander in the pulp refiner and returning the modified pulp to a discharging pulp tank.

Preferably, the slurry distribution flow system further comprises a second-stage pressure screen 501 connected with a slurry pipeline of the first-stage pressure screen 26, a good slurry pipeline of the second-stage pressure screen 501 is connected to the first-stage pressure screen 26, and a slurry pipeline of the second-stage pressure screen 501 is sequentially connected to the slurry tank 502 and the medium-consistency good slurry pool 8; the water draining pipes of forming section 29 are connected to an outside water tank 504 and a wire water pool 505, respectively, and outside water tank 504 is connected to dilution water screen 503, second stage pressure screen 501, first stage pressure screen 26, respectively, by pipes, and the water draining pipe of dilution water screen 503 is connected to headbox 28, and the overflow pipe of outside water tank 504 is connected to wire water pool 505, and the water draining pipe of press section 30 is connected to wire water pool 505.

In order to recover the fibers in the slag pulp of the first-stage pressure screen, the slag pulp of the first-stage pressure screen enters a second-stage pressure screen for secondary classification, good pulp obtained by the second-stage pressure screen for classification returns to the first-stage pressure screen, and the slag pulp is buffered by a slag pulp groove and then conveyed to a medium-concentration good pulp tank. The drainage pipeline of the forming part can be respectively connected to the machine white water tank and the net white water tank through a three-way pipe, the drainage pipeline of the squeezing part is also connected to the net white water tank, the machine white water tank is used for providing dilution water for the head box, and also is used for supplementing water for the first-stage pressure screen and the second-stage pressure screen to adjust the concentration; the dilution water screen is used for ensuring that dilution water entering the head box does not contain impurities; the wire water tank is used for storing redundant white water.

Preferably, the white water recovery system comprises a white water multi-disc thickener 601 connected with the wire water pool 505 and the size distribution pool 24 through pipelines, a first water outlet pipeline of the white water multi-disc thickener 601 is sequentially connected with the recovery size pool 602 and the size distribution pool 24, a second water outlet pipeline of the white water multi-disc thickener 601 is sequentially connected with the turbid white water pool 603 and the white water tower 604, a third water outlet pipeline of the white water multi-disc thickener 601 is connected with a clear water pool 605, and a fourth water outlet pipeline of the white water multi-disc thickener 601 is sequentially connected with an ultra-clear water pool 606, an ultra-clear water filter 607 and a filtered ultra-clear water pool 608.

White water in the net water white pool is classified into 4 grades by a white water multi-disc thickener, and enters a pulp recovery pool, a turbid white water pool, a clear water pool and an ultra-clear water pool from high to low according to the concentration of contained fibers; the pulp mixing tank provides cushion layer pulp for the white water multi-disc thickener. The fiber concentration in the recovery pulp tank is the highest, and the fiber returns to the pulp preparation tank to enter the production flow; the white water in the turbid white water pool enters a white water tower to be stored and can be used as washing water in the previous production flow; the white water in the clear water tank has low fiber content and can be used as spray water of a multi-disc thickener and spray water of a forming part; the white water in the ultra-clear water tank has the lowest fiber content, enters the filtered ultra-clear water tank for storage after passing through the ultra-clear water filter, and can be used as heating and ventilating spray water, forming part spray water and squeezing part spray water. The white water recovery system can realize the recovery and reuse of white water in the papermaking process so as to reduce the total water consumption.

Preferably, the broke recovery system comprises a broke pulper 506, the accept line of the broke pulper 506 is connected to a broke tower 507 and a high broke consistency desander 508 in turn, the accept line of the high broke consistency desander 508 is connected to a broke multi-disc thickener 509, a fluffer 510 and a medium consistency accept tank 8 in turn, and the sludge line of the high broke consistency desander 508 is connected to a sludge recovery tank.

Broke produced during the production in the forming section, press section, etc. can be recovered by a broke recovery system. Conveying paper pulp formed after pulping treatment of broke through a broke pulper to a broke tower for storage and buffering, and conveying the paper pulp to a high-concentration desander for impurity removal; and conveying the residue slurry obtained by impurity removal to a residue recovery tank for centralized treatment, and collecting the good slurry into a medium-concentration good slurry tank after the good slurry is concentrated by a multi-disc concentrator and fluffed by a fluffer in sequence.

The foregoing is a description of one or more embodiments of the utility model, which is more specific and detailed, but is not to be construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the spirit of the utility model, which falls within the scope of the utility model. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. The utility model provides a pulping of corrugated paper joins in marriage thick liquid and drifting system, includes pulping system, coarse screen system, screening clean system, joins in marriage thick liquid drifting system, white water recovery system, sediment thick liquid processing system which characterized in that:

the pulping system comprises a hydrapulper (2), a paper pulp outlet pipeline of the hydrapulper (2) is connected with a high-concentration desander (3), and a good pulp pipeline of the high-concentration desander (3) is connected with a discharging pulp pond (4);

the coarse screening system comprises a section of coarse screening (5) connected with the discharging slurry pool (4) through a pipeline, a fine slurry pipeline of the section of coarse screening (5) is sequentially connected with a coarse screening fine slurry pool (6) and a medium concentration desander (7), and a fine slurry pipeline of the medium concentration desander (7) is connected with a medium concentration fine slurry pool (8);

the screening and purifying system comprises a classifying screen (9) connected with the medium-consistency stock tank (8) through a pipeline, a long fiber outlet pipeline of the classifying screen (9) is sequentially connected with a long fiber vertical pipe (10) and a long fiber desander (11), the fine pulp pipeline of the long fiber sand remover (11) is connected with a section of fine screen (12), the fine pulp pipeline of the section of fine screen (12) is sequentially connected with a long fiber multi-disc thickener (13), a long fiber pulp tank (14), a long fiber pulp tower (15), a long fiber pre-grinding tank (16), a long fiber pulp grinder (17) and a long fiber post-grinding tank (18), a short fiber outlet pipeline of the classifying screen (9) is sequentially connected with a short fiber vertical pipe (19) and a short fiber desander (20), a good pulp pipeline of the short fiber sand remover (20) is sequentially connected with a short fiber multi-disc thickener (21), a short fiber pulp pool (22) and a short fiber pulp tower (23);

the slurry distribution and flow feeding system comprises a slurry distribution tank (24) connected with a short fiber slurry tower (23) and a long fiber grinding rear tank (18) through pipelines, the slurry distribution tank (24) is sequentially connected with a slurry forming tank (25) and a section of pressure screen (26), a good slurry pipeline of the section of pressure screen (26) is sequentially connected with a pulse buffer tank (27), a head box (28) and a forming part (29), and a paper web outlet of the forming part (29) is connected with a squeezing part (30).

2. The system for making, distributing and flowing corrugated paper as recited in claim 1, wherein: the pulping system further comprises a hydraulic slag removal machine (201) connected with a light slag outlet of the hydraulic pulper (2), a good pulp pipeline of the hydraulic slag removal machine (201) is sequentially connected with a pulping high-position box (202) and a cylindrical screen (203), the good pulp pipeline of the cylindrical screen (203) is connected to an inlet of the hydraulic pulper (2), a slag pulp pipeline of the high-concentration sand remover (3) is connected to a pulping sand-water separator (204), a liquid outlet of the pulping sand-water separator (204) is connected to an inlet of the hydraulic pulper (2), and slag pulp pipelines of the hydraulic slag removal machine (201), the cylindrical screen (203) and the pulping sand-water separator (204) are all connected to a waste slag recovery pool.

3. The system for making, distributing and flowing corrugated paper as recited in claim 1, wherein: the coarse screening system further comprises one section of vertical pipe (301) of the coarse screen connected with the slag and pulp pipeline of one section of coarse screen (5), the one section of vertical pipe (301) of the coarse screen is connected with two sections of coarse screens (302) through a pipeline, the good pulp pipeline of the two sections of coarse screens (302) is connected with the coarse screen good pulp pool (6), the slag and pulp pipeline of the two sections of coarse screens (302) is sequentially connected with two sections of vertical pipes (303) of the coarse screen and a fiber separator (304), the good pulp pipeline of the fiber separator (304) is connected with the one section of vertical pipe (301) of the coarse screen, the slag and pulp pipeline of the fiber separator (304) is sequentially connected with a coarse screen high position box (305) and a slag and pulp separator (306), the good pulp pipeline of the slag pulp separator (306) is sequentially connected with a collecting pool (307) and a sand remover (308), the pulp pipeline of the sand remover (308) is connected with the hydrapulper (2), the slag slurry pipelines of the slag discharging separator (306) and the desander (308) are both connected to a waste slag recovery tank.

4. The system for making, distributing and flowing corrugated paper as recited in claim 1, wherein: the screening and purifying system also comprises a three-section desander (401) connected with slag and slurry pipelines of the short fiber desander (20) and the long fiber desander (11), a good slurry pipeline of the three-section desander (401) is connected to the long fiber vertical pipe (10), and a slag and slurry pipeline of the three-section desander (401) is connected to a four-section desander (402); the good pulp pipeline of the four-section desander (402) is connected to the three-section desander (401), and the good pulp pipeline of the four-section desander (402) is connected to the five-section desander (403); the good slurry pipeline of the five-section desander (403) is connected to the four-section desander (402), the residue slurry pipeline of the five-section desander (403) is connected to the screening sand-water separator (404), the good slurry pipeline of the sand-water separator (404) is connected to the six-section desander (405), and the residue slurry pipeline of the sand-water separator (404) is connected to the waste residue recovery tank; the good slurry pipeline of the six-section desander (405) is connected to a fine screening slurry pool (410), and the slurry pipeline of the six-section desander (405) is connected to the screening sand-water separator (404); the slag and pulp pipeline of the first section of fine screen (12) is sequentially connected to a first vertical pipe (406) of the fine screen and a second section of fine screen (407), the good pulp pipeline of the second section of fine screen (407) is connected to the long-fiber multi-disc concentrator (13), the slag and pulp pipeline of the second section of fine screen (407) is sequentially connected to a second vertical pipe (408) of the fine screen and a tailings screen (409), the good pulp pipeline of the tailings screen (409) is connected to the first vertical pipe (406) of the fine screen, and the slag and pulp pipeline of the tailings screen (409) is connected to the fine screen slag and pulp tank (410).

5. The system of claim 4 for making a corrugated paper stock and flow, wherein: sediment thick liquid processing system include with fine screen sediment thick liquid pond (410) pass through vibrating screen (701) of pipe connection, the sediment thick liquid pipe connection of vibrating screen (701) is in hydrapulper (2), the good thick liquid pipeline of vibrating screen (701) has connected gradually sediment thick liquid pond (702), concentrated machine (703), storage tank (704), sediment thick liquid high concentration desander (705) of sediment thick liquid, the good thick liquid pipeline of sediment thick liquid high concentration desander (705) has connected gradually sediment thick liquid fiberizer (706) sediment thick liquid pond (4) of unloading, the sediment thick liquid pipe connection of sediment thick liquid high concentration desander (705) is to waste residue recovery pond.

6. The system for making, distributing and flowing corrugated paper as recited in claim 1, wherein: the slurry distribution flow feeding system also comprises a second-section pressure screen (501) connected with a slurry pipeline of the first-section pressure screen (26), a good slurry pipeline of the second-section pressure screen (501) is connected to the first-section pressure screen (26), and a slurry pipeline of the second-section pressure screen (501) is sequentially connected to a slurry tank (502) and a medium-concentration good slurry pool (8); the drainage pipes of the forming section (29) are connected to an off-machine white water tank (504) and a wire white water pool (505), respectively, the off-machine white water tank (504) is connected to a dilution water screen (503), the two-stage pressure screen (501), the one-stage pressure screen (26) through pipes, respectively, the drainage pipes of the dilution water screen (503) are connected to the headbox (28), and the overflow pipe of the off-machine white water tank (504) is connected to the wire white water pool (505).

7. The system of claim 6, wherein the corrugated paper is pulped, distributed and streamed, and comprises: the white water recovery system comprises a white water multi-disc thickener (601) connected with the wire mesh white water pool (505) and the pulp distribution pool (24) through pipelines, a first water discharge port pipeline of the white water multi-disc thickener (601) is sequentially connected to the pulp recovery pool (602) and the pulp distribution pool (24), a second water discharge port pipeline of the white water multi-disc thickener (601) is sequentially connected to a turbid white water pool (603) and a white water tower (604), a third water discharge port pipeline of the white water multi-disc thickener (601) is connected with a clear water pool (605), and a fourth water discharge pipeline of the white water multi-disc thickener (601) is sequentially connected with an ultra-clear water pool (606), an ultra-clear water filter (607) and a filtered ultra-clear water pool (608).

8. The system for making, distributing and flowing corrugated paper as recited in claim 1, wherein: still include the broke recovery system, the broke recovery system includes broke pulper (506), the good thick liquid pipeline of broke pulper (506) is connected to broke tower (507), high concentration broke desander (508) in proper order, the good thick liquid pipeline of high concentration broke desander (508) is connected to the concentrated machine of broke polydisc (509), fluffer (510) in proper order medium concentration good pulp pond (8), the sediment thick liquid pipe connection of high concentration broke desander (508) is to the waste residue recovery pond.