Glue spraying glue solution recycling system in papermaking production

Abstract

The utility model belongs to the technical field of glue solution recycling and reusing, and particularly relates to a glue spraying glue solution recycling and reusing system in papermaking production. The glue spraying glue solution recycling and reusing system in papermaking production comprises a glue spraying device, a vacuum box and a purified water pipeline, the glue spraying device is connected with the vacuum box, the vacuum box is connected with a glue suction storage tank, the glue suction storage tank is connected with a vibrating screen through a conveying pump, the vibrating screen is connected with a dilution tank through a U-shaped glue solution conveying pipeline, and the dilution tank is connected with a return tank. The reflux tank is connected with the glue spraying device through the reflux pump, the purified water pipeline is divided into a clean water pipeline and a dilution water pipeline, and the dilution water pipeline is connected with the top of the dilution tank. According to the glue spraying glue solution recycling system in papermaking production, the vacuum box, the vibrating screen and other devices are reasonably designed, so that glue solution recycling in the paper production process is achieved, and the problem of non-uniform permeation and gluing is solved to a certain extent.

Description

Technical Field

[0001] This utility model belongs to the field of adhesive recycling and reuse technology, specifically relating to an adhesive recycling and reuse system for papermaking production. Background Technology

[0002] The excess adhesive recycling system in the paper coating process is designed to address the issue that coating machines often generate a large amount of excess adhesive when coating the surfaces of substrates such as paper and film. During the coating process, the adhesive may drip or overflow during spraying. If this excess adhesive is not recycled, it will not only waste resources but may also pollute the environment.

[0003] Traditional coating machines typically have a recovery mechanism installed below the spraying area to recycle the adhesive. These recovery mechanisms may include components such as a receiving cone, a recovery bin, an absorption mechanism, and a filtration mechanism to collect, filter, and store excess adhesive. However, these traditional recovery mechanisms often have some problems, such as the inconvenience of adjusting the height of the collection tank, leading to material splashing and affecting the efficiency of paint collection and the quality of material recovery.

[0004] CN218902513U discloses a water-based adhesive recovery device, which realizes the recovery of adhesive liquid through an adhesive collection box. With the help of a support rod, limiting frame, fixing clamp, connecting rod, bearing, sliding plate, scraper, hand-tightening bolt, spring, support plate, threaded long shaft, connecting block, threaded hole and other structures, it can scrape off the water-based adhesive adhering to the surface of the cardboard and control the amount of adhesive scraped. At the same time, the scraped water-based adhesive can be recovered to avoid waste of water-based adhesive. However, the device does not process or utilize the recovered adhesive liquid, and it uses the method of scraping off water-based adhesive, which is not suitable for the production of special paper and other types of paper.

[0005] In summary, the excess glue recycling system in the paper coating process is an efficient and environmentally friendly solution that can significantly reduce glue waste. Therefore, the rational design of the glue recycling system is of great significance. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing technologies and provide a system for recycling and reusing sizing solution in papermaking. By rationally designing devices such as vacuum boxes and vibrating screens, the system realizes the recycling and reuse of sizing solution during papermaking and, to a certain extent, solves the problem of uneven sizing penetration.

[0007] The papermaking sizing solution recycling system of this utility model includes a sizing device connected to a vacuum chamber, which is connected to a sizing storage tank. The sizing storage tank is connected to a vibrating screen via a transfer pump. The vibrating screen is connected to a dilution tank via a U-shaped sizing solution delivery pipe. The dilution tank is connected to a return tank, which is connected to the sizing device via a return pump. The top of the dilution tank is connected to a dilution water pipe.

[0008] The top of the vacuum chamber has a flat structure, consisting of two ceramic panels with a certain gap between them. Each ceramic panel has a sealing strip groove near the bottom center, and a sealing strip is installed on the sealing strip groove. The sealing strip can completely cover the gap between the two ceramic panels.

[0009] The sealing strip is removable and has a detachable opening on one side of the vacuum chamber, allowing for its removal and replacement. The sealing strip is made of high-molecular-weight polyethylene material. When the paper in the glue application device is different and the required vacuum level for glue absorption is different, the vacuum level of the vacuum chamber can be changed by adjusting the sealing strip model.

[0010] The vibrating screen includes a screen and an outer wall. The outer wall has a groove on the side that contacts the screen. The screen mesh is 80 mesh.

[0011] The groove on the outer wall is provided with a pipeline connected to the slag collection tank.

[0012] The U-shaped adhesive delivery pipe is transparent, with a filter element installed at the inlet and a concentration monitoring device installed on it.

[0013] The dilution water pipe is a branch of the pure water pipe. The pure water pipe is divided into two lines: a clean water pipe and a dilution water pipe. The outlet of the clean water pipe is located at the top of the vibrating screen, and a rotatable spherical nozzle is installed at the outlet of the clean water pipe.

[0014] The pipe interface connecting the rotatable spherical nozzle to the cleaning water pipe is a detachable structure with built-in threads. When the distance between the rotatable spherical nozzle and the vibrating screen cannot achieve all-round spraying, the appropriate distance can be adjusted through this structure. The rotatable spherical nozzle can withstand a certain pressure and is turned on once every 30 minutes to clean the screen regularly.

[0015] The dilution water pipeline is equipped with a control valve, which is controlled by a concentration monitoring device on the U-shaped adhesive delivery pipeline. The dilution water flow rate is automatically adjusted according to the adhesive concentration.

[0016] Specifically, the papermaking glue recycling system involves spraying glue onto the paper surface during glue application. A vacuum chamber is located at the bottom, and its sealing strip is changed according to the paper material and glue state. The gap between the two ceramic panels of the vacuum chamber is perpendicular to the glue application position on the paper. During glue application, the vacuum chamber is opened, and excess glue seeps from the paper surface and, under the suction of the vacuum chamber, enters the glue storage tank. The glue is then pumped to a vibrating screen and filtered through an 80-mesh sieve before entering a dilution tank. To ensure glue cleanliness, the pipe connecting the vibrating screen and the dilution tank is a transparent U-shaped pipe equipped with a filter element. Its functions are: firstly, to filter out impurities not filtered by the 80-mesh sieve; secondly, the U-shaped structure creates pressure at the filter element location to ensure filtration effectiveness; and finally, the transparent pipe allows for real-time monitoring of the glue state and color, ensuring stable operation of the device. The adhesive enters the dilution tank, and purified water simultaneously enters the dilution tank through the purified water pipeline, the dilution water pipeline, and the control valve to dilute the adhesive. The diluted adhesive then enters the return tank and finally flows back to the glue application device, thus achieving the reuse of the adhesive.

[0017] During the filtration of the adhesive solution at the vibrating screen, a pressure-resistant, rotatable spherical nozzle is installed on the upper part of the screen to ensure its cleanliness. This nozzle is connected to a cleaning water pipe and is activated every 30 minutes to clean the screen periodically. Impurities generated after cleaning enter the grooves on the outer wall of the vibrating screen through the screen, and then flow into the slag collection tank. When the waste residue has poor flowability, the rotatable spherical nozzle is activated and pressure is applied to convert the waste residue into a suspension using purified water before it enters the slag collection tank. Simultaneously, to ensure stable system operation, the transfer pump, return pump, concentration monitoring device, and control valves are all automated and can be operated via DCS. Furthermore, to ensure the safety of each device, level displays are installed on the vibrating screen, dilution tank, and return tank for real-time monitoring.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] (1) The papermaking glue recycling system of this utility model achieves reasonable and controllable vacuum degree by designing the sealing strip structure in the vacuum box, and at the same time, controls the vacuum degree to achieve uniform paper penetration and glue coating.

[0020] (2) The papermaking production glue recycling and reuse system of this utility model has a reasonable design for the vibrating screen, which not only realizes the timed cleaning of the screen, but also realizes the continuous recycling of waste residue. At the same time, the U-shaped pipe ensures the cleanliness of the glue and the quality of glue reuse.

[0021] (3) The papermaking glue recycling system of this utility model is designed with DCS automatic control system and liquid level display to ensure the stability of system operation and realize the recycling of glue. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the papermaking adhesive recycling system in this utility model.

[0023] Figure 2 This is a side view of the vacuum chamber of the papermaking adhesive recycling system in this utility model.

[0024] Figure 3 This is a side view of the vibrating screen of the papermaking glue recycling system in this utility model.

[0025] Figure 4 This is an enlarged view of section A of the papermaking adhesive recycling and reuse system in this utility model.

[0026] In the diagram: 1. Glue application device; 2. Vacuum box; 3. Glue storage tank; 4. Transfer pump; 5. Vibrating screen; 6. Dilution tank; 7. Pure water pipeline; 8. Clean water pipeline; 9. Rotatable spherical nozzle; 10. Dilution water pipeline; 11. Control valve; 12. Concentration monitoring device; 13. Return tank; 14. Return pump; 15. U-shaped glue delivery pipeline; 16. Slag collection tank; 201. Ceramic panel; 202. Sealing strip groove; 203. Sealing strip; 501. Outer wall; 502. Screen; 503. Outer wall groove; 1501. Filter element. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings.

[0028] like Figure 1-4 As shown, the papermaking sizing solution recycling system includes a sizing device 1, a vacuum chamber 2, and a pure water pipeline 7. The sizing device 1 is connected to the vacuum chamber 2, the vacuum chamber 2 is connected to the sizing storage tank 3, the sizing storage tank 3 is connected to the vibrating screen 5 via a transfer pump 4, the vibrating screen 5 is connected to the dilution tank 6 via a U-shaped sizing solution transfer pipeline 15, the dilution tank 6 is connected to the return tank 13, the return tank 13 is connected to the sizing device 1 via a return pump 14, and the pure water pipeline 7 is divided into a clean water pipeline 8 and a dilution water pipeline 10, with the dilution water pipeline 10 connected to the top of the dilution tank 6.

[0029] The top of the vacuum chamber 2 is a flat structure, consisting of two ceramic panels 201 with a certain gap between them. Each ceramic panel 201 has a sealing strip groove 202 near the bottom of its center. A sealing strip 203 is installed on the sealing strip groove 202, and the sealing strip 203 can completely cover the gap between the two ceramic panels 201.

[0030] The vibrating screen 5 includes a screen 502 and an outer wall 501, and an outer wall groove 503 is provided on the side of the outer wall 501 that contacts the screen 502.

[0031] A pipeline connected to the slag collection tank 16 is provided at the groove 503 on the outer wall.

[0032] The U-shaped adhesive delivery pipe 15 is transparent, and a filter element 1501 is installed at the inlet of the U-shaped adhesive delivery pipe 15. A concentration monitoring device 12 is installed on the U-shaped adhesive delivery pipe 15.

[0033] The outlet of the cleaning water pipe 8 is located at the top of the vibrating screen 5, and the outlet of the cleaning water pipe 8 is equipped with a rotatable spherical nozzle 9.

[0034] A control valve 11 is installed on the dilution water pipeline 10. The control valve 11 is controlled by the concentration monitoring device 12 on the U-shaped adhesive delivery pipeline 15, and automatically adjusts the dilution water flow rate according to the adhesive concentration.

[0035] The papermaking glue recycling system described above involves the glue spraying device 1 spraying glue onto the paper surface during operation. The bottom is a vacuum box 2. The vacuum box 2 has its sealing strip 203 changed according to the paper material and glue state. The gap between the two ceramic panels 201 of the vacuum box 2 is perpendicular to the glue spraying position on the paper. During glue spraying, the vacuum box 2 is opened, and excess glue permeates from the paper surface. Under the suction of the vacuum box 2, it enters the glue storage tank 3. Subsequently, the glue is pumped by the transfer pump 4 to the vibrating screen 5. After being filtered through an 80-mesh screen 502, the glue enters the dilution tank 6. To ensure the cleanliness of the glue, the pipe connecting the vibrating screen 5 and the dilution tank 6 is a transparent U-shaped pipe equipped with a filter element 1501. Its functions are: firstly, to filter out impurities not filtered by the 80-mesh screen 502; secondly, the U-shaped structure creates pressure at the filter element 1501 to ensure filtration effectiveness; and finally, the transparent pipe allows for real-time monitoring of the glue state and color, ensuring stable operation of the device. The adhesive enters the dilution tank 6, and pure water enters the dilution tank 6 simultaneously through the pure water pipe 7, the dilution water pipe 10, and the control valve 11 to dilute the adhesive. The diluted adhesive then enters the return tank 13 and finally flows back to the glue application device 1 to achieve the reuse of the adhesive.

[0036] During the filtration of the adhesive solution at the vibrating screen 5, a pressure-resistant rotatable ball nozzle 9 is installed on the upper part of the vibrating screen 5 to ensure the cleanliness of the screen 502. This nozzle is connected to the cleaning water pipe 8 and is activated every 30 minutes to periodically clean the screen 502. Impurities generated after cleaning enter the outer wall groove 503 of the outer wall 501 of the vibrating screen 5 from the screen 502, and then enter the slag collection tank 16. When the waste residue has poor flowability, the rotatable ball nozzle 9 is activated and a certain pressure is applied, using pure water to convert the waste residue into a suspension before it enters the slag collection tank 16. Simultaneously, to ensure the stable operation of the system, the transfer pump 4, return pump 14, concentration monitoring device 12, and control valve 11 are all automatic control devices capable of DCS operation. Furthermore, to ensure the safety of each device, the vibrating screen 5, dilution tank 6, and return tank 13 are all equipped with liquid level displays for real-time monitoring of the devices.

Claims

1. A system for recycling sizing glue solution in paper production, characterized in that The application relates to a glue spraying device (1), a vacuum box (2) and a pure water pipeline (7), wherein the glue spraying device (1) is connected with the vacuum box (2), the vacuum box (2) is connected with a glue suction storage tank (3), the glue suction storage tank (3) is connected with a vibrating screen (5) through a conveying pump (4), the vibrating screen (5) is connected with a dilution tank (6) through a U-shaped glue liquid conveying pipeline (15), the dilution tank (6) is connected with a backflow tank (13), the backflow tank (13) is connected with the glue spraying device (1) through a backflow pump (14), the pure water pipeline (7) is divided into a cleaning water pipeline (8) and a dilution water pipeline (10), and the dilution water pipeline (10) is connected with the top of the dilution tank (6).

2. The system for recycling the sizing solution in paper production according to claim 1, characterized in that, The top of the vacuum box (2) is a plane structure formed by two ceramic face plates (201), the two ceramic face plates (201) are provided with a certain gap in the middle, the two ceramic face plates (201) are provided with sealing strip clamping grooves (202) at the bottom of the central parts, sealing strips (203) are arranged on the sealing strip clamping grooves (202), and the sealing strips (203) can completely cover the gap between the two ceramic face plates (201).

3. The system for recycling the sizing solution in paper production according to claim 1, characterized in that, The vibrating screen (5) comprises a screen mesh (502) and an outer wall (501), and the outer wall (501) is provided with an outer wall groove (503) on the side in contact with the screen mesh (502).

4. The system for recycling the sizing solution in paper production according to claim 3, characterized in that, A pipeline connected with a slag collecting pool (16) is arranged at the outer wall groove (503).

5. The system for recycling the sizing solution in paper production according to claim 1, characterized in that, The U-shaped glue liquid conveying pipeline (15) is a transparent structure, a filter core (1501) is arranged at the inlet of the U-shaped glue liquid conveying pipeline (15), and a concentration monitoring device (12) is arranged on the U-shaped glue liquid conveying pipeline (15).

6. The system for recycling the sizing solution in paper production according to claim 1, characterized in that, The outlet of the cleaning water pipeline (8) is located at the top of the vibrating screen (5), and the outlet of the cleaning water pipeline (8) is provided with a rotatable ball-shaped nozzle (9).

7. The system for recycling the sizing solution in paper production according to claim 1, characterized in that, A control valve (11) is arranged on the dilution water pipeline (10).

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