Purification device for surface sizing material

Abstract

The utility model discloses a kind of surface sizing sizing material's purification device, including sizing unit, slag removal unit, tail slag processing unit and good sizing material purification unit.The sizing unit includes the work station, pressure screen feed pump, pressure screen and sizing machine connected in turn.The slag removal unit includes the slag removal device feeding groove, slag removal device feed pump and slag removal device connected in turn.The tail slag processing unit includes at least one first round sieve;The feed pipe of each first round sieve is connected to the tail slag pipe of slag removal device, and the good sizing pipe of each first round sieve is connected to the slag removal device feeding groove.The good sizing material purification unit includes at least one second round sieve;The feed pipe of each second round sieve is connected to the good sizing pipe of slag removal device, and the good sizing pipe of each second round sieve is connected to the work station.The technical scheme provided by the utility model realizes to the good sizing material of slag removal device preliminary separation is screened again, can further remove the small impurities remaining in sizing material, make the impurity content in sizing material significantly reduce.

Description

Technical Field

[0001] This utility model relates to the field of papermaking equipment technology, and in particular to a purification device for surface sizing adhesive. Background Technology

[0002] In the papermaking industry, surface sizing is a crucial process for improving paper performance (such as surface strength and water resistance). In actual production, impurities inevitably enter the sizing system along with the sizing compound, causing contamination and affecting the sizing effect. Therefore, purification of the sizing compound in the surface sizing system is necessary. In existing technology, the purification process for surface sizing compound is as follows: after entering the slag remover, the separated good sizing compound is directly returned to the surface sizing system for recycling; the tailings separated by the slag remover are sent to a circular screen for further processing, and the treated tailings are discharged, while a small amount of recovered sizing compound can be recycled. The drawback of this process is that the good sizing compound from the slag remover is directly returned to the surface sizing system without further purification, resulting in incomplete purification, insufficient sizing cleanliness, and difficulty in guaranteeing the sizing effect.

[0003] In view of the above technical problems, this utility model proposes a purification device for surface sizing adhesive, which can further purify the good adhesive separated by the slag remover and then send it back to the surface sizing system for recycling, thereby improving the purification effect of the adhesive in the surface sizing system. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a purification device for surface sizing adhesive, which aims to solve the technical problem that the purification effect of adhesive in the surface sizing system in the prior art needs to be improved.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A purification device for surface sizing adhesive includes an sizing unit, a slag removal unit, a tailings treatment unit, and a good adhesive purification unit. The sizing unit comprises a workstation, a pressure screen feed pump, a pressure screen, and a sizing machine connected in sequence; the return pipe of the sizing machine is connected to the workstation. The slag removal unit comprises a slag remover feeding trough, a slag remover feed pump, and a slag remover connected in sequence; the feed pipe of the slag remover feeding trough is connected to the return pipe of the sizing machine. The tailings treatment unit includes at least one first circular screen; the feed pipe of each first circular screen is connected to the tailings pipe of the slag remover, and the good adhesive pipe of each first circular screen is connected to the slag remover feeding trough. The good adhesive purification unit includes at least one second circular screen; the feed pipe of each second circular screen is connected to the good adhesive pipe of the slag remover, and the good adhesive pipe of each second circular screen is connected to the workstation.

[0006] Furthermore, in the purification device for surface-applied adhesive, a first bypass pipe is provided between the feed pipe of the pressure screen and the good adhesive pipe of the pressure screen, and a first bypass valve is provided on the first bypass pipe.

[0007] Furthermore, in the purification device for surface sizing adhesive, the sizing unit also includes a square screen, the tailings pipe of the pressure screen is connected to the square screen, and the good adhesive pipe of the square screen is connected to the workstation.

[0008] Furthermore, in the purification device for the surface adhesive, a second bypass pipe is provided between the return pipe of the adhesive applicator and the square screen, and a second bypass valve is provided on the second bypass pipe.

[0009] Furthermore, in the purification device for surface-applied adhesive, each of the first circular screens is equipped with a one-way valve on its adhesive tube.

[0010] Furthermore, in the purification device for the surface adhesive, each of the first circular screens is equipped with a first valve on its feed pipe.

[0011] Furthermore, in the purification device for the surface adhesive, each of the second circular screens is equipped with a second valve on its feed pipe.

[0012] Furthermore, in the purification device for the surface adhesive, the good adhesive purification unit is equipped with a good adhesive return main pipe, and the good adhesive pipe of each second circular screen is respectively connected to the good adhesive return main pipe.

[0013] Furthermore, in the purification device for the surface adhesive, a third bypass pipe is provided between the good adhesive pipe of the slag remover and the good adhesive return main pipe, and a third bypass valve is provided on the third bypass pipe.

[0014] Beneficial effects: This utility model provides a purification device for surface-applied adhesives, which, compared with the prior art, has at least the following beneficial effects: (1) By adding a good glue purification unit, this utility model realizes the re-screening of the good glue initially separated by the slag remover, which can further remove the fine impurities remaining in the glue, significantly reduce the impurity content in the glue, effectively avoid problems such as uneven sizing and paper surface defects caused by impurities, and greatly improve the key properties such as paper surface strength and water resistance.

[0015] (2) Furthermore, by setting up a good rubber return main pipe, the good rubber conveying path of multiple second circular screens is simplified, and the clean rubber material is concentrated and stably returned.

[0016] (3) Furthermore, by setting up the first bypass pipe, the second bypass pipe, the third bypass pipe and the corresponding valves, the maintenance or failure scenarios of key equipment such as pressure screen, square screen and good glue purification unit can be flexibly dealt with, ensuring the continuity of the glue application process. Attached Figure Description

[0017] Figure 1 A simplified structural diagram of the purification device for surface adhesive provided by this utility model.

[0018] Explanation of reference numerals in the attached figures: 1. Workstation; 19. Pressure screen feed pump; 2. Pressure screen; 21. Feed pipe of pressure screen; 22. Good rubber pipe of pressure screen; 23. Tailings pipe of pressure screen; 27. First bypass pipe; 271. First bypass valve; 3. Glue applicator; 32. Glue applicator return pipe; 33. Glue applicator tailings pipe; 37. Second bypass pipe; 371. Second bypass valve; 4. Square screen; 42. Good rubber hose for square screen; 43. Tailings pipe for square screen; 49. Discharge pump for square screen; 439. Tailings collection tank; 5. Slag remover feeding trough; 51. Slag remover feeding trough inlet pipe; 59. Slag remover feed pump; 6. Slag remover; 62. Good rubber hose of slag remover; 63. Tail slag pipe of slag remover; 7. First circular screen; 71. Feed pipe of the first circular screen; 72. Good rubber pipe of the first circular screen; 73. Tailings pipe of the first circular screen; 711. First valve; 739. Tailings collection tank; 720. Check valve; 8. Second circular screen; 81. Feed pipe of the second circular screen; 82. Good rubber pipe of the second circular screen; 83. Tailings pipe of the second circular screen; 89. Good rubber return main pipe; 811. Second valve; 839. Tailings collection tank; 100. Floor slab. Detailed Implementation

[0019] To make the objectives, technical solutions, and effects of this utility model clearer and more explicit, the present utility model is further described in detail below. It should be understood that the specific embodiments described herein are merely for explaining this utility model and are not intended to limit this utility model.

[0020] Please see Figure 1 This utility model provides a purification device for surface-applied adhesive. The accompanying drawings are for illustrative purposes only and are not proportional to actual products. The drawings only depict structures relevant to the innovation of this application; some conventional structures (such as valves and fittings) are not specifically shown. Arrows in the drawings indicate the direction of fluid flow.

[0021] The terms "first" and "second" used in this document are merely different names for similar structures to facilitate explanation, and are not intended to limit this application, nor do they indicate the priority between components.

[0022] A purification device for surface sizing adhesive includes an sizing unit, a slag removal unit, a tailings treatment unit, and a good adhesive purification unit.

[0023] The sizing unit comprises a workstation 1, a pressure screen feed pump 19, a pressure screen 2, and a sizing machine 3 connected in sequence (the attached diagram only schematically shows the two sizing rollers of the sizing machine). The return pipe 32 of the sizing machine is connected to the workstation. The workstation 1 is preferably a stainless steel storage tank with a feed inlet at the top and a discharge outlet at the bottom. The pressure screen feed pump 19 is preferably a centrifugal pump; the pressure screen can be a medium-consistency pressure screen commonly used in the papermaking industry.

[0024] The slag removal unit includes a slag remover feeding trough 5, a slag remover feed pump 59, and a slag remover 6 connected in sequence; the feed pipe 51 of the slag remover feeding trough is connected to the return pipe 32 of the sizing machine. The slag remover 6 can be a heavy-duty slag remover, which uses centrifugal force to separate good rubber from impurities. The slag remover feed pump 59 is preferably a centrifugal pump, connected to the discharge port at the bottom of the slag remover feeding trough, and the outlet of the slag remover feed pump is connected to the inlet of the slag remover through a pipe. It should be noted that this utility model does not limit the specific number of slag removers; the slag removers can be set as a single unit or multiple units in parallel according to the processing capacity requirements. In practical applications, multiple slag removers can be set in parallel (6 slag removers are schematically shown in the figure) to form a slag remover group, thereby increasing the rubber processing capacity and avoiding rubber accumulation due to insufficient slag removal capacity of a single slag remover.

[0025] The tailings processing unit includes at least one first circular screen 7 (two first circular screens are schematically shown in the figure); the feed pipe 71 of each first circular screen is connected to the tailings pipe 63 of the slag remover, and the good rubber pipe 72 of each first circular screen is connected to the feed trough 5 of the slag remover. The screen mesh size of the first circular screen is preferably 0.10~0.15mm. The first circular screen processes the tailings discharged from the tailings pipe 63 of the slag remover and sends the small amount of good rubber obtained to the feed trough of the slag remover; the tailings separated by the first circular screen are discharged through the tailings pipe 73 of the first circular screen into the corresponding tailings collection trough 739.

[0026] The good rubber purification unit includes at least one second circular screen 8; the feed pipe 81 of each second circular screen is connected to the good rubber pipe 62 of the slag remover, and the good rubber pipe 82 of each second circular screen is connected to the workstation 1. The screen mesh size of the second circular screen is preferably 0.08~0.12m. The good rubber separated by the second circular screen is sent back to the workstation to realize the recycling of the purified rubber material; the tailings separated by the second circular screen are discharged into the corresponding tailings collection tank 839 through the tailings pipe 83 of the second circular screen.

[0027] Furthermore, a first bypass pipe 27 is provided between the feed pipe 21 and the rubber-receiving pipe 22 of the pressure screen, and a first bypass valve 271 is installed on the first bypass pipe. This arrangement increases the operational flexibility of the pressure screen. For example, when the impurity content of the rubber material in the workstation is extremely low, fine screening by the pressure screen is not required, and some or all of the rubber material can be transported through the bypass pipe by opening the first bypass valve. In addition, if the pressure screen malfunctions and cannot operate normally, the first bypass valve can also be opened to ensure that the rubber material can be normally transported to the applicator.

[0028] Furthermore, the sizing unit also includes a square screen 4. The tailings pipe 23 of the pressure screen is connected to the square screen 4, and the good adhesive pipe 42 of the square screen is connected to the workstation 1. By adding a square screen, the sizing unit can realize the recycling of adhesive material in the tailings of the pressure screen. In practical applications, a square screen discharge pump 49 is installed on the good adhesive pipe 42 of the square screen. The square screen screens the tailings separated by the pressure screen, separates the good adhesive, and then sends it back to the workstation through the square screen discharge pump. The tailings separated by the square screen are discharged into the corresponding tailings collection tank 439 through the tailings pipe 43 of the square screen.

[0029] Furthermore, a second bypass pipe 37 is provided between the return pipe 32 of the glue applicator and the square screen 4, and a second bypass valve 371 is provided on the second bypass pipe. The second bypass can be opened or closed according to the actual operating conditions. For example, when the square screen is operating normally, a portion of the return glue can be diverted for auxiliary purification; when the square screen is under maintenance, the second bypass valve is closed.

[0030] Furthermore, each of the first circular screens is equipped with a one-way valve 720 on its rubber tube 72. By setting the one-way valve, the rubber material is only allowed to flow unidirectionally from the first circular screen to the feed trough of the slag remover, which can effectively prevent the rubber material in the feed trough of the slag remover from flowing back into the first circular screen.

[0031] Furthermore, each of the first circular screens is equipped with a first valve 711 on its feed pipe 71. This configuration enables independent control of each individual first circular screen, improving the operational flexibility of the tailings processing unit. For example, when a first circular screen needs to be shut down for maintenance, the first valve on its feed pipe is closed, cutting off the tailings feed to that screen, while the remaining first circular screens can continue to receive and process the tailings normally.

[0032] Furthermore, each of the second circular screens is equipped with a second valve 811 on its feed pipe 81. This configuration enables independent control of each individual second circular screen, improving the operational flexibility of the high-quality rubber purification unit.

[0033] Furthermore, the good glue purification unit is equipped with a good glue return main pipe 89, and the good glue pipes 82 of each second circular screen are respectively connected to the good glue return main pipe 89. This arrangement simplifies the pipeline layout and enables centralized recovery and stable transportation of good glue.

[0034] Furthermore, a third bypass pipe 67 is installed between the good glue pipe 62 of the slag remover and the good glue return main pipe 89, and a third bypass valve 671 is installed on the third bypass pipe. When the entire good glue purification unit is shut down, the relevant control components at the feed end of the second circular screen are closed, and the third bypass valve is opened. The good glue separated by the slag remover can be directly connected to the good glue return main pipe through the third bypass pipe, and can be transported back to the workstation without flowing through the second circular screen, ensuring that the good glue after slag removal can be continuously supplied to the glue application unit and ensuring that the entire set of equipment can operate continuously.

[0035] In practical applications, the various devices of this system can be installed on different floors. Figure 1 The dashed line 100 represents the floor slab; the pressure screen, sizing machine, slag remover, first circular screen, and second circular screen are located on the floor above floor slab 100; the workstation, square screen, slag remover feed chute, pressure screen feed pump, square screen discharge pump, and slag remover feed pump are located on the floor below floor slab 100. This arrangement facilitates the flow of materials separated from the sizing machine, slag remover, first circular screen, and second circular screen to the corresponding equipment by gravity.

[0036] For ease of understanding, the working process of this device is briefly described below.

[0037] (1) Rubber material recycling process: The rubber material prepared in the upstream process is sent to the work station and conveyed to the pressure screen by the pressure screen feed pump. The pressure screen performs preliminary screening of the rubber material. The qualified rubber material after screening is conveyed to the sizing machine through the outlet pipe. The sizing machine applies the rubber material to the paper surface. The rubber material that is not fully utilized by the sizing machine is returned to the work station through the return pipe of the sizing machine to realize the sizing cycle.

[0038] (2) Slag removal process: Part of the adhesive material in the return pipe of the adhesive applicator enters the feed trough of the slag remover through the feed pipe of the feed trough of the slag remover, and is then pressurized by the feed pump of the slag remover and transported to the slag remover; the slag remover sends the separated good adhesive to the good adhesive purification unit and sends the separated tail slag to the tail slag treatment unit.

[0039] (3) Tailings recycling process: The tailings (containing a small amount of rubber) discharged from the slag remover enter each first circular screen through the feed pipe. The first circular screen further screens and recovers the good rubber, which is sent to the feed trough of the slag remover and re-enters the slag remover group for circulation and purification; the separated tailings are discharged from the system.

[0040] (4) Good glue purification process: The good glue separated by the slag remover group enters each second circular screen. The second circular screen performs fine screening of the good glue to further improve the cleanliness of the glue. The good glue screened by each second circular screen flows into the good glue return main pipe and finally returns to the work station to participate in the glue application cycle.

[0041] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. It is understood that those skilled in the art can make equivalent substitutions or modifications based on the technical solution and inventive concept of the present utility model, and all such modifications or substitutions should fall within the protection scope of the present utility model.

Claims

1. A purification device for surface sizing adhesive, comprising an sizing unit, a slag removal unit, and a tailings treatment unit, characterized in that: It also includes a good glue purification unit; The adhesive application unit includes a workstation, a pressure screen feed pump, a pressure screen, and an adhesive applicator connected in sequence; the return pipe of the adhesive applicator is connected to the workstation. The slag removal unit includes a slag remover feeding trough, a slag remover feed pump, and a slag remover connected in sequence; the feed pipe of the slag remover feeding trough is connected to the return pipe of the sizing machine. The tailings treatment unit includes at least one first circular screen; the feed pipe of each first circular screen is connected to the tailings pipe of the slag remover, and the rubber tube of each first circular screen is connected to the feed trough of the slag remover. The good rubber purification unit includes at least one second circular screen; the feed pipe of each second circular screen is connected to the good rubber pipe of the slag remover, and the good rubber pipe of each second circular screen is connected to the workstation.

2. The purification device for surface-applied adhesives according to claim 1, characterized in that: A first bypass pipe is installed between the feed pipe and the rubber tube of the pressure screen, and a first bypass valve is installed on the first bypass pipe.

3. The purification device for surface adhesive compound according to claim 1, characterized in that: The sizing unit also includes a square screen, with the tailings pipe of the pressure screen connected to the square screen and the sizing pipe of the square screen connected to the workstation.

4. The purification device for surface-applied adhesives according to claim 1, characterized in that: A second bypass pipe is installed between the return pipe of the glue applicator and the square screen, and a second bypass valve is installed on the second bypass pipe.

5. The purification device for surface-applied adhesives according to claim 1, characterized in that: Each of the first circular screens is equipped with a one-way valve on its rubber tube.

6. The purification device for surface-applied adhesives according to claim 1, characterized in that: Each of the first circular screens has a first valve installed on its feed pipe.

7. The purification device for surface-applied adhesives according to claim 1, characterized in that: Each of the second circular screens has a second valve installed on its feed pipe.

8. The purification device for surface-applied adhesives according to claim 1, characterized in that: The good glue purification unit is equipped with a good glue return main pipe, and the good glue pipe of each second circular screen is connected to the good glue return main pipe.

9. The purification device for surface-applied adhesives according to claim 8, characterized in that: A third bypass pipe is installed between the good rubber pipe of the slag remover and the good rubber return main pipe, and a third bypass valve is installed on the third bypass pipe.

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