阅读说明：本技术 一种表面施胶淀粉胶液的净化系统及其应用净化系统 (Purification system for surface sizing starch glue solution and application purification system thereof ) 是由 吴建雄 陈学萍 宋杰 林飞 陈剑锋 于 2020-07-14 设计创作，主要内容包括：本发明公开了一种表面施胶淀粉胶液的净化系统及其应用净化系统。包括依次管道连接并且形成回路的上胶槽、施胶机、回流槽,其中,上胶槽连接施胶机之间的管路形成上胶单元,施胶机连接回流槽并且通往上胶槽的管路形成回流单元,其特征在于：所述上胶单元还包括上料筛,所述回流单元还包括依次连接的除渣器、方振筛；其中,所述上料筛用于过滤上胶单元胶液中的杂质；所述除渣器用于除去回流单元胶液中密度大的杂质；所述方振筛用于除去回流单元胶液中体积大的杂质；净化系统的应用将施胶机的上辊和下辊分别设有独立的净化系统同时除杂。本发明将回流胶液依次采用离心力除渣和体积除渣的方式,更有效提高回流淀粉胶液的洁净度。(The invention discloses a purification system for surface sizing starch glue solution and an application purification system thereof. Including pipe connection in proper order and the rubberizing groove, sizing applicator, the backward flow groove that forms the return circuit, wherein, pipeline formation rubberizing unit between the sizing applicator is connected to the rubberizing groove, and the sizing applicator is connected the backward flow groove and is led to the pipeline formation backward flow unit in rubberizing groove, its characterized in that: the gluing unit further comprises a feeding screen, and the backflow unit further comprises a slag remover and a square vibrating screen which are sequentially connected; the feeding sieve is used for filtering impurities in the glue solution of the gluing unit; the slag remover is used for removing impurities with high density in the glue solution of the reflux unit; the square vibrating screen is used for removing impurities with large volume in the glue solution of the reflux unit; the application of the purification system is to respectively arrange the upper roller and the lower roller of the sizing machine with independent purification systems for simultaneously removing impurities. According to the invention, the reflux glue solution is sequentially subjected to centrifugal force slag removal and volume slag removal, so that the cleanliness of the reflux starch glue solution is more effectively improved.)

1. The utility model provides a clean system of surface sizing starch glue solution, is including pipe connection in proper order and rubberizing groove (100), sizing machine (300), return tank (400) that form the return circuit, and wherein, pipeline formation rubberizing unit (200) between rubberizing groove (100) connection sizing machine (300), and return tank (400) are connected in sizing machine (300) and the pipeline formation return unit (500) that lead to rubberizing groove (100), its characterized in that: the gluing unit (200) further comprises a feeding screen (210), and the backflow unit (500) further comprises a slag remover (510) and a square vibrating screen (520) which are sequentially connected; the feeding sieve (210) is used for filtering impurities in glue solution of the gluing unit (200); the slag remover (510) is used for removing impurities with high density in the glue solution of the reflux unit (500); the square vibrating screen (520) is used for removing large-volume impurities in the glue solution of the reflux unit (500).

2. The system for purifying a surface sizing starch glue solution according to claim 1, characterized in that: the feeding sieve (210) is a pressure sieve, and the sieve gap of the pressure sieve is 80-100 mu m.

3. A system for purifying a surface sizing starch dope according to claim 2, characterised in that: two pressure sieves are connected in series between the gluing groove (100) and the gluing machine (300).

4. The system for purifying a surface sizing starch glue solution according to claim 1, characterized in that: the slag separator (510) is a conical slag separator (510), and the pressure difference of an inlet and an outlet of the slag separator (510) is 100-150 KPa.

5. The system for purifying a surface sizing starch glue solution according to claim 4, characterized in that: the slag remover (510) is provided with a plurality of slag removers which are connected in series for use.

6. The system for purifying a surface sizing starch glue solution according to claim 5, characterized in that: the backflow unit (500) is further provided with a slag settling tank (530), and the slag settling tank (530) is used for purifying slag rubber discharged by the slag remover (510).

7. The system for purifying a surface sizing starch glue solution according to claim 6, characterized in that: the top of the slag settling tank (530) is downwards provided with a plurality of baffles in parallel.

8. The system for purifying a surface sizing starch glue solution according to claim 7, characterized in that: the baffle is equipped with 4.

9. The system for purifying a surface sizing starch glue solution according to claim 1, characterized in that: the screen mesh of the square vibrating screen (520) is 100-120 meshes.

10. The glue solution purification system for double-sided gluing of paper is characterized in that: the sizing machine (300) is provided with an upper roller and a lower roller which are used for sizing the front and back surfaces of the paper respectively, wherein the upper roller and the lower roller of the sizing machine (300) are respectively provided with independent purification systems as claimed in claims 1-7.

Technical Field

The invention belongs to the technical field of a waste paper papermaking production process, and relates to a purification system for surface sizing starch glue solution and an application purification system thereof.

Background

The main raw material for producing the packing paper is waste paper, and the waste paper is recycled to manufacture the cardboard paper, which needs a certain special property, mainly comprising a series of properties such as paper strength, printability, water resistance, stiffness and the like. The waste paper is smashed, decolored and pulped to produce the recycled paper through various procedures, and 80 percent of the raw materials of the packing paper are from the recycled waste paper, so the waste paper is praised as environment-friendly paper with low energy consumption and light pollution. The limitation of the current national policy on imported waste paper leads the production of packaging paper to be dominated by national waste, namely domestic waste paper, and the domestic waste paper is paper made of wood fibers recycled for many times, so that the paper fibers are short, and a lot of fine sand and other impurities are doped in the processes of making, recycling and reusing. Compared with imported waste paper, the quality of domestic waste paper is much poorer, because the foreign waste paper is relatively less in recycling frequency, the content of fiber in one time is high, and the strength of the imported waste paper is much higher when the imported waste paper is reused. Because the quality of domestic waste is poor and the strength is low, the surface gluing process is needed to improve the strength in the production flow of the packaging paper, and the surface gluing process is to change starch into liquid with certain viscosity after the starch is steamed, gelatinized, screened and purified, and the liquid is called surface gluing, namely surface gluing starch glue solution. The glue solution is transferred to the paper surface of the base paper by surface sizing equipment according to a certain solid content and viscosity range, so that the paper has higher strength (breakage resistance, folding resistance, ring crush resistance, stiffness, fracture length and the like), and then aluminum sulfate and a surface sizing agent (water repellent agent) are added into the glue solution so that the paper has certain water resistance, and the whole process is called surface sizing of the paper. The requirement on the cleanliness of starch glue solution is high due to the large use amount of starch, and meanwhile, a large amount of fine sand grains and paper wool in domestic waste are brought into the reflowing glue solution, so that the existing glue solution reflowing treatment cannot meet the requirement easily.

Disclosure of Invention

1. Problems to be solved

The invention provides a purification system for a surface sizing starch glue solution, and aims to solve the problem of poor deslagging effect of the existing glue solution.

The invention also provides a glue solution purification system for double-sided gluing of paper, and aims to enhance the deslagging strength of the glue solution.

2. Technical scheme

In order to solve the problems, the technical scheme adopted by the invention is as follows:

a purification system for surface sizing starch glue solution comprises a sizing tank, a sizing machine and a backflow tank which are sequentially connected through pipelines and form a loop, wherein the sizing tank is connected with a pipeline between the sizing machines to form a sizing unit; the feeding sieve is arranged between the gluing tank and the gluing machine and used for removing impurities in glue solution of the gluing unit, and the glue solution flowing out of the gluing tank enters the gluing machine for gluing after impurity removal treatment of the feeding sieve; the glue inlet end of the slag remover is connected with the glue outlet end of the reflux tank, and the slag remover is used for removing impurities with high density in the glue solution of the reflux unit; the glue inlet end of the square vibrating screen is connected with the glue outlet end of the slag remover, the glue outlet end of the square vibrating screen is connected with the upper glue tank and used for introducing the treated backflow glue solution into the glue tank, and the square vibrating screen is used for removing large-volume impurities in the backflow unit glue solution.

Further, the feeding sieve is a pressure sieve, and sieve gaps of the pressure sieve are 80-100 microns.

Furthermore, two pressure sieves are connected in series between the sizing groove and the sizing machine.

Further, the slag remover is a conical slag remover, the pressure difference of an inlet and an outlet of the slag remover is 100-150 Kpa, and the feeding pressure is 300 Kpa.

Furthermore, the slag remover is provided with a plurality of slag removers which are connected in series for use, and preferably 10 slag removers are connected in series to form a group for use.

Furthermore, the backflow unit is also provided with a slag settling tank, and the slag settling tank is used for purifying slag glue discharged by the slag remover.

Furthermore, a plurality of baffles are arranged at the top of the slag settling tank downwards in parallel.

Further, the number of the baffle plates is 4.

Furthermore, the screen mesh of the square vibrating screen is 100-120 meshes.

The glue solution purification system for double-sided gluing of the paper is characterized in that the gluing machine is provided with an upper roller and a lower roller which are used for simultaneously gluing the front side and the back side of the paper respectively, wherein the upper roller and the lower roller of the gluing machine are respectively provided with the independent purification systems.

Furthermore, the upper roller and the lower roller are metal bars with the diameter of 10-15 mm, uniform grooves are distributed on the surfaces of the upper roller and the lower roller, and surface glue is uniformly distributed on the sizing roller through the grooves, so that the paper surface can be attached with relatively uniform surface glue.

3. Advantageous effects

Compared with the prior art, the invention has the beneficial effects that:

(1) aiming at the problem that more impurities are generated in the process of producing paperboards or cartons by using domestic waste paper, the invention arranges a group of slag separators for treating fine sand grains and paper wool in the backflow glue solution, wherein the backflow glue solution is firstly subjected to the slag separators to remove the fine sand grains, and then is further filtered by a vibrating screen to remove light impurities such as the paper wool; the deslagging device arranged in the backflow unit adopts a centrifugal force heavy slag removal mode, so that the existing mode of filtering impurities by adopting a volume mode is avoided, sand grains with small volume and large density are omitted, specifically, the deslagging device utilizes the density of a substance to separate, the centrifugal force is larger when the density is larger, fine sand with large density in glue liquid can be separated in the rotating process of the glue liquid, the traditional treatment process can only separate impurities with large size in the glue liquid, the sand grains with small size cannot be screened out, and the fine sand grains can block a hanging rod of the glue applicator after entering a system, so that the glue application is not uniform; after the centrifugal force is used for removing slag, light fibers such as paper wool and the like are removed in a volume screening mode, so that the purification of glue solution in the reflux unit is facilitated;

(2) The centrifugal force slag remover of the original gluing unit is moved into the backflow unit to treat heavy slag firstly, so that the heavy slag of backflow glue solution is prevented from flowing into the gluing tank, the phenomenon that the inlet of the gluing tank is easy to block is reduced, the clean glue solution in the gluing tank is prevented from being polluted firstly, the heavy slag is dispersed, further impurity removal procedures are not facilitated, and the cleanliness of the glue solution is influenced finally;

(3) the glue solution to be purified is firstly processed by pasting starch, wherein the pasting starch has the action mechanism that the pasted starch is uniformly coated on the surface of paper to improve the strength of the paper, and the starch is an organic matter with larger molecular weight and can decompose the organic molecular groups in groups into molecular structures with a plurality of branched chains after being cooked and pasted, and the molecular structures of the branched chains have stronger strength after being dried and combined on the surface of the paper, so that the strength of the paper is improved;

(4) the invention also adds a mutually independent purification system in the sizing process of the front and back surfaces of the paper, and the cleanliness of the backflow glue solution is enhanced by arranging one purification system in the prior art.

Drawings

FIG. 1 is a process flow diagram of a purification system in example 1 of the present invention;

FIG. 2 is a process flow diagram of a purification system in example 2 of the present invention;

FIG. 3 is a schematic structural view of a slag settling tank according to the present invention;

FIG. 4 is a process flow diagram of a reflow unit in a purification system in accordance with example 2 of the present invention;

FIG. 5 is a process flow diagram of a purification system according to example 3 of the present invention;

FIG. 6 is a process flow diagram of a purification system according to example 4 of the present invention;

FIG. 7 is a process flow diagram of a reflow unit in a purification system according to example 4 of the present invention;

in the figure:

100. gluing a groove; 200. a gluing unit; 210. feeding and screening; 211. a first section of pressure screen; 212. a second section of pressure screen; 300. a sizing machine; 310. gluing an upper roller; 320. a sizing lower roller; 400. a reflux tank; 500. a reflux unit; 510. a slag remover; 520. square vibrating screen; 530. a slag settling tank; 531. a first baffle plate; 532. a second baffle; 533. a third baffle plate; 534. a fourth baffle; 535. a first ball valve; 536. a second ball valve; 537. a third ball valve; 538. a fourth ball valve; 539. and a fifth ball valve.

Detailed Description

The invention is further described with reference to specific examples.