CN211645768U

CN211645768U - Broke processing system for producing boxboard

Info

Publication number: CN211645768U
Application number: CN201922353338.6U
Authority: CN
Inventors: 黄宏权; 韩冲; 杨文恒
Original assignee: Nine Dragons Paper Holdings Ltd
Current assignee: Nine Dragons Paper Holdings Ltd
Priority date: 2019-12-24
Filing date: 2019-12-24
Publication date: 2020-10-09
Anticipated expiration: 2029-12-24

Abstract

The application provides a broke processing system for producing linerboards, the system comprising a plurality of broke pulpers, a broke tower for storing a plurality of broke pulpers' stock, a plurality of trays for washing and concentrating the stock of the broke tower. The broke treatment system of the invention utilizes the characteristics of less chemicals used in the production of the cardboard paper, less impurities in the produced broke and low requirements on screening and purifying equipment after pulping, and shortens the process of recycling the broke for papermaking. The use of the pulp tower is reduced, and the field layout is optimized; the retention time of the damaged paper pulp in the system is reduced, the possibility of fiber degradation in the flowing process is greatly reduced, the equipment operation load of a pulping workshop is reduced, and the effects of saving power consumption, water consumption and pulping chemical consumption are achieved; the invention reduces the chance of the broken paper pulp passing through the purifying and screening device, is beneficial to the retention of the fine fiber in the pulp, and further improves the utilization rate of the broken paper fiber.

Description

Broke processing system for producing boxboard

Technical Field

The application relates to the field of papermaking, in particular to a broken paper processing system for producing box board.

Background

In the production process of the box board, a paper machine often broke is provided with a wire part couch roll, a press, a surface sizing agent, a curl and a rewinding, and a broke pool is arranged below the paper machine and is generally classified into wet broke and dry broke. After the broke is disintegrated in the broke pond, dry broke pulp enters a dry loss tower, and wet broke pulp enters a wet loss tower. The pulp in the two broke towers is fed into a pulping pool, and the paper can be formed again after the whole process of pulping, drifting and paper making. In the process, the broke is broken and then returns to the pulping system, the retention time of the broke in the production system is too long, bacteria are easy to breed, and fiber components are partially degraded to reduce the availability of fibers of the broke. It should be noted that, the raw materials of waste paper pulping and papermaking production are mostly domestic waste paper, domestic waste paper cyclic utilization number of times is many, and fibre quality itself is relatively poor, and the fine fiber component accounts for the relative altitude, can lead to the fine fiber component to run off in a large number at screening, purification stage through whole pulping process again, and this part thick liquid has consumed water, power and chemicals, also can cause manufacturing cost's increase. Broke disposal systems designed in the prior art need to occupy more pulp tower and pulp chest capacities, increasing the burden of the production system.

Disclosure of Invention

The technical problem that this application will be solved provides a broken paper processing system of production boxboard.

In order to solve the above technical problem, the present application provides a broke handling system for producing linerboards, said system comprising a plurality of broke pulpers, a broke tower for storing a plurality of broke pulpers' stock, and a plurality of trays for washing and concentrating the stock of the broke tower.

Preferably, the broke pulpers are rewinding broke pulpers, surface sizing, curling broke pulpers, couch rolls and press broke pulpers.

Preferably, the system also comprises a mixed pulp tank arranged behind the plurality of discs and used for preparing pulp.

Preferably, the system further comprises a flow system arranged after the mixed stock chest, and the stock treated by the flow system enters the paper machine shop.

Preferably, the flow system comprises a pulp tank, a slag separator, a pulp flushing tank and a pressure screen.

Preferably, a first dilution water adding position for adding dilution water is arranged on a connecting pipeline of the broke tower and the multiple disks.

Preferably, a second dilution water adding position for adding dilution water is arranged on a connecting pipeline between the multiple disks and the mixed slurry tank.

Preferably, a stirring device for stirring is arranged in the broke tower.

Preferably, the broke pulper and the connecting pipes of the multiple discs are provided with a transfer pump for transferring pulp in the broke pulper to the broke tower.

The broke treatment system for producing the boxboard is used for reestablishing a set of broke rapid recycling papermaking system aiming at the defects of long retention time of slurry, power consumption increase, chemical consumption increase, poor retention of fine fiber components and the like caused by overlong broke recycling papermaking process. The main functions of the system are as follows: the retention rate of the fine fiber components is improved, and the power consumption of the pulp loss tower is reduced; the recycling of the white water of the broke pulping is completed; the production load of the pulping system is reduced; the method realizes the quick recycling of the broke for papermaking, and improves the production efficiency and the benefit.

The broke treatment system of the invention utilizes the characteristics of less chemicals used in the production of the cardboard paper, less impurities in the produced broke and low requirements on screening and purifying equipment after pulping, and shortens the process of recycling the broke for papermaking. The use of the pulp tower is reduced, and the field layout is optimized; the retention time of the damaged paper pulp in the system is reduced, the possibility of fiber degradation in the flowing process is greatly reduced, the equipment operation load of a pulping workshop is reduced, and the effects of saving power consumption, water consumption and pulping chemical consumption are achieved; the invention reduces the chance of the broken paper pulp passing through the purifying and screening device, is beneficial to the retention of the fine fiber in the pulp, and further improves the utilization rate of the broken paper fiber.

Drawings

Fig. 1 is a schematic structural view of a broke handling system for producing linerboards according to the present application.

Wherein: 1. a broke tower; 2. multiple discs; 3. a mixed slurry tank; 4. a streaming system; 5. a paper machine shop; 6. rewinding a broke pulper; 7. surface sizing, curling broke pulper; 8. couch roll, press broke pulper; 9. a first dilution water addition; 10. second dilution water addition.

Detailed Description

The present application is further described below in conjunction with the following figures and specific examples to enable those skilled in the art to better understand the present application and to practice it, but the examples are not intended to limit the present application.

As shown in fig. 1, the present application provides a broke handling system for producing linerboards, said system comprising a plurality of broke pulpers, a broke tower 1 for storing pulp of a plurality of said broke pulpers, and a plurality of trays 2 for washing and concentrating the pulp of the broke tower 1. The broke pulpers are respectively a rewinding broke pulper 6, surface glue, a curling broke pulper 7, a couch roll and a squeezing broke pulper 8. The broke tower 1 is internally provided with a stirring device for stirring. And the connecting pipelines of the broke pulper and the multiple discs 2 are respectively provided with a conveying pump for conveying the pulp in the broke pulper to the broke tower 1.

In the existing waste paper pulping line, a pulping discharge pond is positioned behind a pulper, and the pulp concentration is 2.5-4.2%; the pulp in the front pond of the grading screen comes from a first-stage coarse screen, and the pulp concentration is 2-2.6%. In this application, the pulp in the broke tower 1 is not returned to the pulp chest of the pulping workshop, but is sent to an additionally arranged multi-disc 2, and after the pulp is washed and concentrated by the multi-disc 2 pulp washer, the pulp is pumped to the mixed pulp chest 3 for pulp preparation.

A first dilution water adding part 9 for adding dilution water is arranged on a connecting pipeline of the broke tower 1 and the multi-disc 2. A second dilution water adding part 10 for adding dilution water is arranged on a connecting pipeline between the multiple disks 2 and the mixed slurry tank 3. The broke tower 1 has a pulp concentration of 2.5-4.2% and is diluted by adding dilution water at a first dilution water addition point 9 before entering the multi-tray 2. When the multi-disc 2 works, the pulp inlet concentration is about 1 percent, and the pulp outlet concentration is about 10 percent. The slurry concentration in the mixed slurry tank 3 is required to be about 4%, the slurry concentration from the multi-tray 2 is high, and the slurry is diluted by the dilution water added in the second dilution water.

The system also comprises a flow system 4 arranged behind the mixed pulp tank 3, and the pulp treated by the flow system 4 enters a paper machine workshop 5. The flow conveying system 4 comprises a pulp tank, a slag separator, a pulp flushing tank and a pressure screen.

The above-described embodiments are merely preferred embodiments for fully illustrating the present application, and the scope of the present application is not limited thereto. The equivalent substitution or change made by the person skilled in the art on the basis of the present application is within the protection scope of the present application. The protection scope of this application is subject to the claims.

Claims

1. Broke handling system for producing linerboards, characterized in that the system comprises a plurality of broke pulpers, a broke tower for storing pulp of a plurality of said broke pulpers, and a plurality of trays for washing and concentrating the pulp of the broke tower.

2. The system of claim 1, characterized in that the broke pulpers are a rewinding broke pulper, a surface size, a curl broke pulper, a couch roll, a press broke pulper, respectively.

3. The system of claim 1, further comprising a blend chest disposed behind said plurality of pans for dispensing slurry.

4. The system of claim 3, further comprising a flow system disposed after said mixing chest, said flow system directing processed stock to a paper machine room.

5. The system of claim 4, wherein the flow system comprises a slurry tank, a deslagger, a surge tank, and a pressure screen.

6. The system according to claim 3, characterized in that the broke tower and the multi-tray connecting pipes are provided with a first dilution water addition point for adding dilution water.

7. The system of claim 6, wherein a second dilution water addition point for adding dilution water is provided on the connecting pipe between the multiple disks and the mixed slurry tank.

8. The system as claimed in claim 1, characterized in that the broke tower is provided with a stirring device for stirring.

9. The system according to claim 1, characterized in that the broke pulper and the connecting pipes of the discs are each provided with a transfer pump for transferring pulp in the broke pulper to the broke tower.