CN115627653A

CN115627653A - Pulping system for improving beating degree of paper pulp and production process thereof

Info

Publication number: CN115627653A
Application number: CN202211267941.2A
Authority: CN
Inventors: 陈青林; 刘中平; 郭邵富; 吕鹏飞
Original assignee: Shaanxi Dongfang Environmental Protection Industry Group Dongpeng Renewable Resources Utilization Co ltd
Current assignee: Shaanxi Dongfang Environmental Protection Industry Group Dongpeng Renewable Resources Utilization Co ltd
Priority date: 2022-10-17
Filing date: 2022-10-17
Publication date: 2023-01-20

Abstract

The utility model relates to an improve making beating system of paper pulp degree of kowtowing and production technology thereof, relate to the field of papermaking making beating technique, it includes the pulper that communicates in proper order through the pipeline, the desander, the buffering thick liquid tower, beat preceding thick liquid pond, the thick liquid pond after disc mill beating machine and the kowtowing, the buffering thick liquid tower includes the tower body, separator and driving piece, the separator is divided into a plurality of storage thick liquid rooms with separating in the tower body, the driving piece is used for driving the separator and rotates, the tower body lateral wall has inlet pipe and discharging pipe in two adjacent storage thick liquid room fixed intercommunications. This application is through depositing the stop with paper pulp in the buffering thick liquid tower, and the fibre in the paper pulp can be fully lubricated rising, then can improve the disc mill effect to paper pulp more easily when follow-up disc mill making beating, and then be favorable to improving the degree of kowtowing after the paper pulp making beating, and the paper pulp makes the bursting nature of finished paper better, can reduce the quantity of chemical auxiliary material in the follow-up operation, and then can reduce the manufacturing cost of paper.

Description

Pulping system for improving beating degree of paper pulp and production process thereof

Technical Field

The application relates to the field of papermaking pulping technology, in particular to a pulping system for improving the beating degree of paper pulp and a production process thereof.

Background

Beating degree is beating degree. It is the refining effect of cutting, splitting, swelling and hydrating fiber after the reaction slurry passes through the refiner. The representative symbol is ° SR.

The pulping working section in the existing waste paper pulping line is that a wood pulp board is pulped by a wood pulp pulper and then flows through a high-concentration desander to a pre-beating pool, then is pumped to two 1400KW double-disc mills by a pulp pump to carry out serial pulping, and the pulp flows through the disc mills to a post-beating pool and finally is sent to a pulp distribution pool paper feeder to be made into paper.

The degree of kowtowing before normal wood pulp kowtows is 15 SR, through two 1400KW disc mills, the power loading is to the biggest 1250KW, and the degree of kowtowing after the beating can reach 35 SR at most. Actually, the production process requirement can be met only when the frequent knocking degree reaches about 40 degrees SR in the production process, otherwise, the paper is not good in breakage resistance, so that the chemical auxiliary material consumption in the subsequent process is large, and the production cost is high.

Aiming at the related technologies, the inventor considers that the beating degree of the pulped paper pulp in the related technologies can not meet the production requirement, so that the consumption of chemical auxiliary materials in the subsequent processes is large, and the production cost is high.

Disclosure of Invention

In order to improve the beating degree of paper pulp after beating, the application provides a beating system of improvement paper pulp beating degree and production technology thereof.

First aspect, the application provides a improve beating system of paper pulp kowtow degree adopts following technical scheme:

the utility model provides an improve making beating system of paper pulp percussion degree, includes pulper, desander, buffering thick liquid tower, the thick liquid pond before percussion, disc mill beating machine and the thick liquid pond after percussion that communicate in proper order through the pipeline.

Through adopting above-mentioned technical scheme, through increase the buffering thick liquid tower behind the desander, fill the buffering thick liquid tower with paper pulp after, can cushion the required paper pulp of production flow 3 hours in the buffering thick liquid tower, it injects paper pulp to last in the buffering thick liquid tower, make paper pulp can deposit in the buffering thick liquid tower and stop for 3 hours, fibre in the paper pulp can be fully lubricated and rise, then can improve the disc mill effect to paper pulp more easily when follow-up disc mill is beaten, and then be favorable to improving the degree of percussion after the paper pulp is beaten, the degree of percussion of paper pulp can reach 38 SR after the disc mill is beaten, the bursting nature that paper pulp made into is better, can reduce the quantity of chemical industry auxiliary material in the follow-up operation, and then can reduce the manufacturing cost of paper.

Optionally, the buffering thick liquid tower includes tower body, separator and driving piece, the separator is divided into a plurality of storage thick liquid rooms with the tower internal partitioning, the driving piece is used for the drive the separator rotates, the tower body lateral wall has inlet pipe and discharging pipe in two adjacent storage thick liquid room fixed intercommunications.

Through adopting above-mentioned technical scheme, through the separator with being a plurality of storage thick liquid rooms of partition in the tower body, in the production process, the driving piece drives the separator and rotates, and then drives and store up thick liquid room and take place the position change, after filling up paper pulp with a storage thick liquid room through the inlet pipe, along with the driving piece drives the separator and removes, can remove this storage thick liquid room to discharging pipe department from the inlet pipe, then carry out the ejection of compact. Through above-mentioned structure, paper pulp can be soaked moist the rising at the in-process that stores up the thick liquid room and remove to the paper pulp that can avoid the back to get into in the buffering thick liquid tower flows through the discharging pipe earlier than the paper pulp that gets into in the buffering thick liquid tower earlier, thereby can make the paper pulp that gets into in the buffering thick liquid tower fully moist the rising for 3 hours, and then is favorable to improving the degree of kowtowing after the paper pulp beating.

Optionally, the separator includes pivot and a plurality of baffle, the pivot is connected with the tower body coaxial rotation, and is a plurality of pivot circumference interval evenly distributed is followed to the baffle, baffle one side is followed long limit and is connected along axial fixity with the pivot, the baffle keep away from the pivot one side with tower body inner wall butt, the driving piece is used for the drive the pivot is rotated.

Through adopting above-mentioned technical scheme, the during operation starts the driving piece, and the driving piece drives the pivot and rotates, and the pivot drives the baffle of being connected with it when rotating and rotates, and then drives the position of storing up the thick liquid room and takes place to remove, can remove this storage thick liquid room from the inlet pipe department to discharging pipe department, then carries out the ejection of compact. Foretell separator is convenient for with separating into a plurality of storage thick liquid rooms in the tower body to drive the baffle along with the pivot and rotate the position that can change the storage thick liquid room, thereby make paper pulp fully moist in the storage thick liquid room and rise the back and discharge through the discharging pipe, be favorable to improving the degree of kowtowing after the paper pulp making beating, foretell separator has simple structure, easy maintenance's advantage.

Optionally, a stirring part is arranged in the slurry storage chamber, the stirring part includes a stirring rod and a plurality of blades, the stirring rod is rotatably connected with the top of the tower body through a driving part, the blades are axially distributed at intervals along the stirring rod and fixedly connected with the stirring rod, and the driving part is used for driving the stirring rod to rotate.

Through adopting above-mentioned technical scheme, can stir and break up the paper pulp in every storage pulp room alone through setting up the stirring piece in storage pulp room, can carry out the predispersion processing to paper pulp at the moist in-process that rises, avoid paper pulp fibre to reunite to make paper pulp can be fully moisturized and rise in storage pulp room, and then be favorable to improving the degree of percussion after the paper pulp making beating.

Optionally, the driving piece includes drive frame, planetary gear and driving motor, the coaxial mounting hole that has seted up that runs through of tower body roof, the tooth's socket has evenly been seted up along circumference to the pore wall of mounting hole, planetary gear is equipped with a plurality ofly, planetary gear with the drive frame rotates to be connected, and is a plurality of planetary gear all meshes with the tooth's socket, driving motor is used for the drive the driving piece rotates, the pivot with drive frame fixed connection, the puddler with the coaxial fixed connection of planetary gear one-to-one.

Through adopting above-mentioned technical scheme, in the production process, driving motor drives the drive carrier and rotates, drives planetary gear and rotates around the mounting hole when the drive carrier rotates, and planetary gear can wind the drive carrier rotation simultaneously. The rotating shaft is driven to rotate in the rotating process of the driving frame, and the partition plate connected with the rotating shaft is driven to rotate when the rotating shaft rotates, so that the position of the pulp storage chamber is driven to move; the stirring rod is driven to rotate when the planetary gear rotates, and then the blades are driven to rotate, so that the paper pulp in the pulp storage chamber is stirred and scattered, and the planetary gear rotates around the mounting hole to prevent the stirring piece from blocking the movement of the partition plate. The driving piece can drive the separating piece and the stirring piece to rotate simultaneously, an independent driving source is not required to be arranged for the separating piece and the stirring piece, and production energy consumption and equipment manufacturing cost are reduced.

Optionally, fixedly connected with sealed lid on the roof in the tower body, sealed lid will the mounting hole is sealed, the drive rack with planetary gear is located in the sealed lid, the sealed annular of dodging the hole and supplying the puddler to pass that covers coaxially offered and supply the pivot to pass.

Through adopting above-mentioned technical scheme, through setting up sealed lid, can be sealed with the mounting hole, can avoid debris from installation Kong Diaoru in the tower body on the one hand to guarantee the cleanness of paper pulp, on the other hand sealed lid can avoid paper pulp and driving piece contact in process of production, thereby can avoid the driving piece to be soaked by paper pulp and corrode, is favorable to prolonging the life of driving piece.

Optionally, the rotation is connected with the sealing ring on the sealed lid, the sealing ring rotates to be connected in the annular, the commentaries on classics hole has been seted up on the sealing ring, the puddler passes and changes the hole and rotate to connect in changeing downthehole.

Through adopting above-mentioned technical scheme, foretell sealing ring is further sealed the annular to can not hinder the rotation and the removal of puddler, set up the leakproofness that the sealing ring can further strengthen sealed lid.

Optionally, the outlet of the disc mill beater is communicated with a return pipe, and the other end of the return pipe is communicated with a pipeline between the pulp tank and the disc mill beater before beating.

By adopting the technical scheme, the backflow pipe is arranged, so that 20% -40% of pulp subjected to disc grinding pulping flows back, the pulping degree can be improved to a certain extent, the backflow pulp quantity is controlled to be 20%, and the beating degree of the disc grinding pulping reaches 41-42 DEG SR.

Optionally, the heating wire is embedded in the side wall of the tower body.

Through adopting above-mentioned technical scheme, can heat in the tower body through setting up the heating wire to be favorable to accelerating along with the moist speed that rises of paper pulp, make the paper pulp in the buffering thick liquid tower can be fully moist and rise, and then be favorable to improving the degree of kowtowing after the paper pulp making beating.

In a second aspect, the present application provides a production technology for improving pulp beating degree, which adopts the above-mentioned beating system for improving pulp beating degree, and comprises the following steps:

s1, the waste paper is primarily crushed through a pulper, then enters a desander for primary filtration, and the filtered paper pulp enters a buffer pulp tower for swelling;

and S2, the paper pulp is subjected to swelling by a buffer pulp tower and then enters a pulp tank before beating, and then enters a pulp tank after beating after being subjected to beating by a disc mill beating machine, so that the pulp for paper production is obtained.

By adopting the technical scheme, after the buffering pulp tower is added, the pulp fiber has sufficient swelling time, the power of the pulping machine of the two disc mills is loaded to 1000KW, and the beating degree after grinding can reach 38 DEG SR; under the condition of improving the beating degree higher than that before optimization, the electric consumption of pulping per ton pulp is reduced to 240 ℃, so that the aim of improving the beating degree is fulfilled, and the energy consumption is reduced; and by arranging a return pipe, 20-40% of pulp subjected to disc grinding is returned, and the beating degree of the pulp subjected to disc grinding reaches 41-42 DEG SR.

In summary, the present application includes at least one of the following beneficial technical effects:

1. according to the paper pulp beating machine, the buffering pulp tower is arranged, so that paper pulp can be stored and stay in the buffering pulp tower for 3 hours, fibers in the paper pulp can be fully swelled, then the disc grinding effect on the paper pulp can be improved more easily during subsequent disc grinding beating, the beating degree of the paper pulp after beating can be improved, the beating degree of the paper pulp after the disc grinding beating can reach 38-degree SR, the bursting property of the paper pulp prepared into paper is good, the using amount of chemical auxiliary materials can be reduced in subsequent operation, and the production cost of the paper can be reduced;

2. according to the pulp storage tower, the separating parts and the driving parts are arranged in the tower body, so that paper pulp can be soaked and expanded in the process that the pulp storage chamber moves, and the situation that the paper pulp entering the buffering pulp tower later flows out through the discharge pipe earlier than the paper pulp entering the buffering pulp tower earlier can be avoided, so that the paper pulp entering the buffering pulp tower can be fully expanded for 3 hours, and the beating degree of the paper pulp after beating is improved;

3. according to the method, the stirring pieces are arranged in the pulp storage chambers, so that the paper pulp in each pulp storage chamber can be stirred and scattered independently, the paper pulp can be subjected to pre-scattering treatment in the swelling process, paper pulp fiber agglomeration is avoided, the paper pulp can be fully swelled in the pulp storage chambers, and the beating degree of the paper pulp after beating can be improved;

4. this application can heat in the tower body through setting up the heating wire to be favorable to accelerating along with the moist speed that rises of paper pulp, make the paper pulp in the buffering thick liquid tower can be fully moist and rise, and then be favorable to improving the degree of kowtowing after the paper pulp making beating.

Drawings

FIG. 1 is a schematic diagram of the overall structure of a beating system for improving beating degree of pulp in an embodiment of the present application;

FIG. 2 is a schematic view showing the overall structure of a surge tower of a pulping system for improving the beating degree of pulp according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view of a surge tower of an embodiment of the present application;

FIG. 4 is an enlarged view of portion A of FIG. 3;

FIG. 5 is a schematic structural view of a sealing cover, a partitioning member and a stirring member according to an embodiment of the present application.

Reference numerals: 1. a pulper; 2. a desander; 3. a buffer pulp tower; 31. a tower body; 311. an electric heating wire; 312. mounting holes; 313. a tooth socket; 314. a mounting frame; 315. a pulp storage chamber; 316. a feed pipe; 317. a discharge pipe; 318. a sealing cover; 3181. avoiding holes; 3182. a ring groove; 319. a seal ring; 3191. a card slot; 3192. hole turning; 32. a drive member; 321. a driving frame; 322. a planetary gear; 323. a drive motor; 33. a separator; 331. a rotating shaft; 332. a partition plate; 34. a stirring member; 341. a stirring rod; 342. a blade; 4. beating the front pulp tank; 5. disc milling beater; 51. a return pipe; 6. knocking the pulp tank.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

The embodiment of the application discloses a beating system for improving pulp beating degree. Referring to fig. 1, a beating system for improving pulp beating degree comprises a pulper 1, a sand remover 2, a buffering pulp tower 3, a pulp before beating pool 4, a disc mill beater 5 and a pulp after beating pool 6 which are sequentially communicated through a pipeline, wherein an outlet of the disc mill beater 5 is communicated with a return pipe 51, and the other end of the return pipe 51 is communicated with the pipeline between the pulp before beating pool 4 and the disc mill beater 5.

Referring to fig. 1 and 2, the buffer slurry tower 3 includes a tower body 31, a driving member 32 and a partition member 33, the tower body 31 is in a hollow cylindrical shape, heating wires 311 for heating are distributed on the side wall of the tower body 31 along the axial direction of the tower body 31, the partition member 33 is located in the tower body 31, and the driving member 32 is used for driving the partition member 33 to rotate.

Referring to fig. 2 and 3, the driving member 32 includes a driving frame 321, a planetary gear 322 and a driving motor 323, the driving frame 321 is a square plate, the planetary gear 322 is four, the four planetary gear 322 are respectively located at four corners of the driving frame 321, the planetary gear 322 is rotatably connected with the driving frame 321, a mounting hole 312 is coaxially formed in the top wall of the tower body 31 in a penetrating manner, a tooth slot 313 is uniformly formed in the hole wall of the mounting hole 312 along the circumferential direction, the four planetary gear 322 are all engaged with the tooth slot 313, a mounting frame 314 is welded on the top wall of the tower body 31, a housing of the driving motor 323 and the mounting frame 314 are fixedly connected by screws, and an output shaft of the driving motor 323 is spot-welded to a geometric center of the driving frame 321.

Referring to fig. 3, 4 and 5, the partition 33 includes a rotating shaft 331 and four partition plates 332, the rotating shaft 331 is coaxially and rotatably connected in the tower body 31, the top end of the rotating shaft 331 is welded to the geometric center point of the driving plate, the four partition plates 332 are uniformly distributed along the circumference of the rotating shaft 331 at intervals, the partition plates 332 are rectangular plates, one side of each partition plate 332 is axially welded to the rotating shaft 331 along the long edge, and one side of each partition plate 332 far away from the rotating shaft 331 is abutted to the inner wall of the tower body 31. The inside of the tower body 31 is divided into four slurry storage chambers 315 by the partition plate 332, the side wall of the tower body 31 is fixedly communicated with a feed pipe 316 and a discharge pipe 317 on the two adjacent slurry storage chambers 315, the feed pipe 316 is positioned at the top of the tower body 31, and the discharge pipe 317 is positioned at the bottom of the tower body 31.

Referring to fig. 3, 4 and 5, the number of the slurry storage chambers 315 and the number of the slurry storage chambers 315 in this embodiment are equal to four, and in other embodiments, the number of the slurry storage chambers 315 may be freely selected according to the size of the tower body 31, and the number is not limited by this application, and likewise, the number of the planetary gears 322 and the partition plates 332 is matched with the number of the slurry storage chambers 315, and the number is not considered to be limited by this application.

Referring to fig. 3, 4 and 5, the four slurry storage chambers 315 respectively correspond to the four planetary gears 322, a stirring member 34 is disposed in the slurry storage chamber 315, the stirring member 34 includes a stirring rod 341 and blades 342, one end of the stirring rod 341 is coaxially welded to the planetary gears 322 at the top of the tower body 31, and the blades 342 are axially and uniformly distributed along the stirring rod 341 at intervals and welded to the stirring rod 341.

Referring to fig. 3, 4 and 5, a sealing cover 318 is welded on a top wall in the tower body 31, the sealing cover 318 seals the mounting hole 312, the driving rack 321 and the planetary gear 322 are located in the sealing cover 318, an avoiding hole 3181 for the rotating shaft 331 to pass through is coaxially formed in the sealing cover 318, a ring groove 3182 for the stirring rod 341 to pass through is coaxially formed in the sealing cover 318, the sealing cover 318 is rotatably connected with a sealing ring 319 for sealing the ring groove 3182, clamping grooves 3191 are formed in inner and outer radial walls of the sealing ring 319, the sealing ring 319 is rotatably connected to two side walls of the ring groove 3182 through the clamping grooves 3191, a rotating hole 3192 is formed in the sealing ring 319, and the stirring rod 341 passes through the rotating hole 3192 and is rotatably connected to the rotating hole 3192.

The embodiment of the application provides a beating system for improving the beating degree of paper pulp beating, and the implementation principle is as follows: in the production process, fill the paper pulp with buffering thick liquid tower 3 after, can cushion the required paper pulp of production flow 3 hours in the buffering thick liquid tower 3, continue to pour into paper pulp in the buffering thick liquid tower 3 for paper pulp can be deposited in buffering thick liquid tower 3 and stay 3 hours, and the fibre in the paper pulp can be fully lubricated and rise, then can improve the mill effect to paper pulp more easily when follow-up mill is beaten, and then is favorable to improving the degree of beating after the paper pulp is beaten.

Divide into a plurality of thick liquid rooms 315 through partition 33 in with tower body 31, in the production process, driving piece 32 drives partition 33 and rotates, and then drives thick liquid room 315 and take place position change, after filling paper pulp through inlet pipe 316 with a thick liquid room 315, along with driving piece 32 drives partition 33 and removes, can remove this thick liquid room 315 to discharging pipe 317 department from inlet pipe 316 department, then carry out the ejection of compact. The moist in-process that rises, the stirring piece 34 in storing up the thick liquid room 315 can stir the paper pulp in every storage thick liquid room 315 alone and break up to avoid the paper pulp fibre to reunite, thereby make paper pulp can be fully moist and rise in storing up thick liquid room 315, and then be favorable to improving the kowtow degree after the paper pulp making beating.

By arranging the return pipe 51, 20-40% of pulp subjected to disc milling pulping is returned, and the beating degree of the disc milling pulping can reach 41-42 DEG SR.

The embodiment of the application also discloses a production process for improving the pulp beating degree, and the pulping system for improving the pulp beating degree comprises the following steps:

s1, the waste paper is primarily crushed through a pulper 1 and then enters a desander 2 for primary filtration, and the filtered paper pulp enters a buffer pulp tower 3 for swelling;

s2, after the paper pulp is wetted and expanded by the buffer pulp tower 3, the paper pulp enters the pulp tank 4 before beating, and then the paper pulp enters the pulp tank 6 after beating by the disc mill beater 5, so that the pulp for paper production is obtained.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides an improve making beating system of paper pulp kowtows degree which characterized in that: comprises a pulper (1), a sand remover (2), a buffering pulp tower (3), a beating front pulp pool (4), a disc mill beater (5) and a beating rear pulp pool (6) which are sequentially communicated through pipelines.

2. The beating system for improving beating degree of pulp according to claim 1, wherein: buffer slurry tower (3) are including tower body (31), separator (33) and driving piece (32), separator (33) are with dividing into a plurality of storage thick liquid rooms (315) in tower body (31), driving piece (32) are used for the drive separator (33) rotate, tower body (31) lateral wall has inlet pipe (316) and discharging pipe (317) in two adjacent storage thick liquid room (315) fixed intercommunication.

3. The beating system for improving beating degree of pulp according to claim 2, wherein: separator (33) are including pivot (331) and a plurality of baffle (332), pivot (331) are connected, and are a plurality of with the coaxial rotation of tower body (31) baffle (332) are along pivot (331) circumference interval evenly distributed, baffle (332) one side is connected along long limit and pivot (331) along axial fixity, one side that pivot (331) were kept away from in baffle (332) with tower body (31) inner wall butt, driving piece (32) are used for the drive pivot (331) rotate.

4. A refining system according to claim 3 for improving the beating degree of pulp, characterized in that: store up and be equipped with stirring part (34) in thick liquid room (315), stirring part (34) include puddler (341) and blade (342), puddler (341) through driving piece (32) with tower body (31) top is rotated and is connected, blade (342) are equipped with a plurality ofly, and are a plurality of blade (342) are followed puddler (341) axial interval distribution and with puddler (341) fixed connection, driving piece (32) are used for the drive puddler (341) rotate.

5. The beating system for improving beating degree of paper pulp according to claim 4, wherein: driving piece (32) are including drive carrier (321), planetary gear (322) and driving motor (323), mounting hole (312) have been seted up in coaxial running through of tower body (31) roof, tooth's socket (313) have evenly been seted up along circumference to the pore wall of mounting hole (312), planetary gear (322) are equipped with a plurality ofly, planetary gear (322) with drive carrier (321) rotate to be connected, and are a plurality of planetary gear (322) all mesh with tooth's socket (313), driving motor (323) are used for the drive driving piece (32) rotate, pivot (331) with drive carrier (321) fixed connection, puddler (341) with the coaxial fixed connection of planetary gear (322) one-to-one.

6. A refining system according to claim 5, characterized in that: fixedly connected with seals lid (318) on roof in tower body (31), sealed lid (318) will mounting hole (312) are sealed, driving rack (321) with planetary gear (322) are located in sealed lid (318), coaxial seting up dodging hole (3181) and annular (3182) that confession puddler (341) passed that supply pivot (331) to pass on sealed lid (318).

7. The beating system for improving beating degree of paper pulp according to claim 6, wherein: the sealing cover (318) is rotatably connected with a sealing ring (319), the sealing ring (319) is rotatably connected into the ring groove (3182), a rotating hole (3192) is formed in the sealing ring (319), and the stirring rod (341) penetrates through the rotating hole (3192) and is rotatably connected into the rotating hole (3192).

8. The beating system for improving beating degree of pulp according to claim 2, wherein: the outlet of the disc mill beater (5) is communicated with a return pipe (51), and the other end of the return pipe (51) is communicated with a pipeline between the beating front pulp pool (4) and the disc mill beater (5).

9. The beating system for improving beating degree of pulp according to claim 2, wherein: an electric heating wire (311) is embedded in the side wall of the tower body (31).

10. A production process for improving the beating degree of paper pulp is characterized in that: a pulping system for improving the degree of beating of pulp according to any of claims 1 to 9, comprising the steps of:

s1, waste paper is primarily crushed through a pulper (1), then enters a desander (2) for primary filtration, and filtered paper pulp enters a buffer pulp tower (3) for swelling;

s2, the paper pulp enters a pulp tank (4) before beating after being wetted and expanded by a buffer pulp tower (3), and then enters a pulp tank (6) after beating after being beaten by a disc mill beater (5), so that the pulp for paper production is obtained.