White water recycling low carbonization intelligent control device

Abstract

The utility model relates to a kind of white water recycling low-carbon intelligent control device.It solves the problem that white water recovery device in prior art is difficult to carry out multi-mechanism linkage control adjustment according to the liquid level condition of clarifier.It includes white water collecting tank for collecting paper machine overflow white water, white water collecting tank is connected with pulp clarifier assembly by flow control mechanism, pulp clarifier assembly is connected with recovery pulp pool by flow filtering mechanism, and pulp clarifier assembly is connected with long fiber turbidity white water pool for white water delivery by linkage drainage structure, linkage drainage structure, pulp clarifier assembly and flow control mechanism are connected with control module and carry out liquid level adjustment of pulp clarifier assembly.The utility model has the advantages that the accurate control of clarifier liquid level is realized, and the quality and recovery efficiency of recovered pulp are improved.

Description

Technical Field

[0001] This utility model relates to the field of papermaking equipment technology, specifically to a low-carbon intelligent control device for white water recycling. Background Technology

[0002] The papermaking process requires a large amount of water resources. At the same time, the white water discharged from the papermaking equipment also contains a lot of materials such as fibers and fillers that are worth recycling. Therefore, in order to reduce water consumption and recycle materials, most paper mills are equipped with white water recycling equipment.

[0003] Current white water recycling methods mainly achieve solid-liquid separation and resource recovery through filtration and flotation. However, filtration equipment is limited by purification precision and cannot effectively remove tiny fibers and fillers from white water, resulting in incomplete resource recovery. While flotation equipment can improve the cleanliness of white water, it relies on pre-filtration equipment for collaborative operation, and the foam generated during operation requires specialized equipment for treatment, which not only increases equipment investment but also requires frequent cleaning of the foam treatment device. In addition, existing white water recycling devices are difficult to control and adjust in a multi-mechanism linkage manner according to the liquid level in the clarifier, affecting the quality and efficiency of recycling.

[0004] To address the shortcomings of existing technologies, people have conducted long-term explorations and proposed various solutions. For example, Chinese patent literature discloses a papermaking white water recovery device [CN202510918488.4], which includes a recovery tank with an internal recovery and holding space, a conical discharge end on one side, and an open end on the other side through which papermaking white water flows into the recovery tank; a baffle assembly located inside the recovery tank, which divides the internal space of the recovery tank into a negative pressure area and two air flotation areas; and a filter assembly located inside the recovery tank.

[0005] The above solution has solved the problem of insufficient filtration and frequent cleaning required in the existing white water recovery treatment technology to a certain extent. However, the solution still has many shortcomings, such as the difficulty in multi-mechanism linkage control and adjustment based on the liquid level of the clarifier, which affects the recovery quality and efficiency. Summary of the Invention

[0006] The purpose of this invention is to address the above-mentioned problems by providing a low-carbon intelligent control device for white water recycling.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a low-carbon intelligent control device for white water recycling, comprising a white water collection tank for collecting white water overflowing from a paper machine, the white water collection tank being connected to a pulping and clarifying unit via a flow guiding control mechanism, the pulping and clarifying unit being connected to a recovery pulp tank via a flow guiding filtration mechanism, and the pulping and clarifying unit being connected to a long-fiber turbid white water tank via a linkage drainage structure for white water transport, the linkage drainage structure, the pulping and clarifying unit, and the flow guiding control mechanism being connected to a control module for adjusting the liquid level of the pulping and clarifying unit.

[0008] In the aforementioned intelligent control device for low-carbon white water recycling, a number of flow guides arranged in a ring are provided on the inner side of the upper circumference of the white water collection tank, and a flow guide seat is provided inside the white water collection tank. The flow guides extend toward the flow guide seat, and the bottom of the flow guide seat is connected to an anti-splash pressure plate via a telescopic connecting rod.

[0009] In the aforementioned intelligent control device for low-carbon white water recycling, the diameter of the guide seat gradually increases from top to bottom, and a lifting adjustment motor is connected to the bottom of the white water collection tank. The output end of the lifting adjustment motor is connected to the anti-splash pressure plate. Several arc-shaped water inlets are arranged circumferentially on the upper surface of the white water collection tank, and a drain hole is provided at the bottom of the white water collection tank.

[0010] In the aforementioned intelligent control device for low-carbon white water recycling, the flow guide is composed of several flow guide branches, and the flow guide branches are rotatably set with the inner wall of the white water collection tank, and the swing angle is adjusted as the flow guide seat rises and falls.

[0011] In the aforementioned intelligent control device for low-carbon white water recycling, the flow control mechanism includes a flow guide pipe. One end of the flow guide pipe is connected to a drain hole, and the other end is connected to a pulping and clarifying unit. The flow guide pipe is equipped with a white water pump for pumping white water from the white water collection tank to the pulping and clarifying unit. The white water pump is connected to the control module.

[0012] In the aforementioned intelligent control device for low-carbon white water recycling, a flocculant inlet pipe is connected to one end of the guide pipe near the pulping and clarifying device. A pneumatic regulating valve is installed on the flocculant inlet pipe and is connected to the control module.

[0013] In the aforementioned intelligent control device for low-carbon white water recycling, the pulping and clarifying unit includes a pulping and clarifying body, an air inlet valve connected to the upper end of the pulping and clarifying body, a vacuum pump also provided at the upper end of the pulping and clarifying body, and a water inlet hole connected to a guide pipe at the lower end of the pulping and clarifying body.

[0014] In the aforementioned intelligent control device for low-carbon white water recycling, the linkage drainage structure includes a white water drain pipe, on which a drain valve is provided, and the drain valve is connected to the control module.

[0015] In the aforementioned intelligent control device for low-carbon white water recycling, the flow guiding and filtering mechanism includes a slurry guide pipe. One end of the slurry guide pipe is connected to a filter mud tank, and the other end is connected to the main body of the pulping and clarifying device for slurry transportation. The filter mud tank is connected to the recycling slurry tank through a recycling pipe, and a recycling slurry pump is installed on the recycling pipe.

[0016] In the aforementioned intelligent control device for low-carbon white water recycling, a mud-blocking filter screen is provided in the mud tank, and a rotating shaft is provided in the mud tank. Swirling swing rods for conveying slurry toward the bottom of the mud tank are provided at both ends of the rotating shaft. An inclined guide platform is provided at the bottom of the mud tank, and a discharge hole is provided on the outer wall of the mud tank. The discharge hole is connected to the aforementioned slurry guide pipe.

[0017] Compared with the prior art, the advantages of this utility model are as follows: the control module coordinates and regulates the linkage flow control mechanism, pulping and clarifier assembly, linkage drainage structure and flow filtration mechanism to achieve precise control of the clarifier liquid level; the control module dynamically adjusts the white water pump delivery volume, flocculant pneumatic regulating valve opening, drain valve switch and the clarifier air inlet valve and vacuum pump operation status in real time according to the liquid level data of the pulping and clarifier body, thereby ensuring that the clarifier liquid level is in the optimal range, thereby improving the quality and recovery efficiency of the recovered pulp. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the pulping and clarifying device assembly in this utility model;

[0020] Figure 3 This is a cross-sectional view of the filter mud tank in this utility model;

[0021] Figure 4 This is a cross-sectional view of the white water collection tank in this utility model;

[0022] Figure 5 This is a partial connection block diagram of the mechanism in this utility model;

[0023] In the diagram: 1. White water collection tank, 11. Flow guide, 12. Flow guide seat, 13. Telescopic connecting rod, 14. Anti-splash pressure plate, 15. Lifting and adjusting motor, 16. Arc-shaped water inlet, 17. Drainage hole, 2. Flow guide control mechanism, 21. Flow guide pipe, 22. White water pump, 23. Flocculant inlet pipe, 24. Pneumatic regulating valve, 3. Pulping and clarifying unit assembly, 31. Pulping and clarifying unit body, 32. Air inlet valve, 33. Vacuum pump, 34. Water inlet, 4. Flow guide filtration mechanism, 41. Slurry guide pipe, 42. Filter mud tank, 421. Mud-blocking filter screen, 422. Rotating shaft, 423. Swirl swing rod, 424. Material guide platform, 425. Discharge hole, 425. Recovery pipe, 43. Recovery slurry pump, 44. Recovery slurry tank, 5. Linked drainage structure, 6. White water drain pipe, 61. Drainage valve, 62. Long fiber turbid white water tank, 7. Control module, 8. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0025] like Figure 1-5 As shown, a low-carbon intelligent control device for white water recycling includes a white water collection tank 1 for collecting white water overflowing from a paper machine. The white water collection tank 1 is connected to a pulping and clarifying unit 3 via a flow guiding control mechanism 2. The pulping and clarifying unit 3 is connected to a recovery pulp tank 5 via a flow guiding filtration mechanism 4. The pulping and clarifying unit 3 is also connected to a long-fiber turbid white water tank 7 via a linkage drainage structure 6 for white water transportation. The linkage drainage structure 6, the pulping and clarifying unit 3, and the flow guiding control mechanism 2 are connected to a control module 8 to adjust the liquid level of the pulping and clarifying unit 3.

[0026] The upper circumferential inner side of the white water collection tank 1 is provided with several flow guides 11 arranged in a ring, and the white water collection tank 1 is provided with a flow guide seat 12. The flow guides 11 extend toward the flow guide seat 12, and the bottom of the flow guide seat 12 is connected to an anti-splash pressure plate 14 through a telescopic connecting rod 13.

[0027] After the overflowing white water from the paper machine enters the white water collection tank 1, the annular distribution guide section 11 directs the white water to the guide seat 12. The white water flows downward along the outer wall of the guide seat 12. During the flow of white water, the anti-splash pressure plate 14 plays a role in blocking the white water from splashing.

[0028] As can be seen, the diameter of the guide seat 12 gradually increases from top to bottom, and the bottom of the white water collection tank 1 is connected to a lifting adjustment motor 15. The output end of the lifting adjustment motor 15 is connected to the anti-splash pressure plate 14. Several arc-shaped water inlets 16 are arranged circumferentially on the upper surface of the white water collection tank 1, and a drain hole 17 is arranged at the bottom of the white water collection tank 1.

[0029] The anti-splash pressure plate 14 can be raised and lowered as needed to flexibly control the anti-splash height.

[0030] Furthermore, the flow guide 11 is composed of several flow guide branches, and the flow guide branches are rotatably arranged with the inner wall of the white water collection tank 1, and the swing angle is adjusted as the flow guide seat 12 rises and falls.

[0031] The tilt angle is controlled by rotating the flow guide 11 to optimize the flow of white water entering the tank.

[0032] Specifically, the flow control mechanism 2 includes a flow pipe 21, one end of which is connected to a drain hole 17 and the other end is connected to a pulping and clarifying unit 3. The flow pipe 21 is equipped with a white water pump 22 for pumping white water from the white water collection tank 1 to the pulping and clarifying unit 3. The white water pump 22 is connected to the control module 8.

[0033] Furthermore, the end of the guide pipe 21 near the pulping and clarifying device is connected to a flocculant inlet pipe 23, and a pneumatic regulating valve 24 is installed on the flocculant inlet pipe 23, which is connected to the control module 8.

[0034] The control module 8 adjusts the opening of the pneumatic regulating valve 24 on the flocculant inlet pipe 23 according to the white water delivery status, so as to precisely control the amount of flocculant introduced.

[0035] The control module 8 controls the pumping speed of the white water pump 22 on the guide pipe 21. The white water pump 22 pumps the white water in the guide pipe to the pulping and clarifying unit 3, thus completing the speed control of the white water conveyance from the white water collection tank 1 to the pulping and clarifying unit 31.

[0036] More specifically, the pulping and clarifying unit 3 includes a pulping and clarifying unit body 31, an air inlet valve 32 connected to the upper end of the pulping and clarifying unit body 31, a vacuum pump 33 also provided at the upper end of the pulping and clarifying unit body 31, and a water inlet hole 34 connected to the guide pipe 21 at the lower end of the pulping and clarifying unit body 31.

[0037] The white water inlet 34 enters the body 31 of the pulping and clarifying unit. The air inlet valve 32 controls the gas inlet and outlet. After the vacuum pump 33 is started, it adjusts the air pressure inside the body to provide suitable environmental conditions for the white water clarification process inside the body. That is, the vacuum pump 33 performs suction to form a vacuum environment inside the body 31 of the pulping and clarifying unit. After the white water enters and reaches the set liquid level, the vacuum pump 33 is turned off, the air inlet valve 3 is opened, the air is introduced into the body 3 of the pulping and clarifying unit to release pressure, and the liquid level drops, thereby achieving the purpose of liquid level adjustment.

[0038] In detail, the linkage drainage structure 6 includes a white water drain pipe 61, a drain valve 62 is provided on the white water drain pipe 61, and the drain valve 62 is connected to the control module 8.

[0039] Preferably, the flow guiding and filtering mechanism 4 includes a slurry guide pipe 41, one end of which is connected to a filter mud tank 42 and the other end is connected to the pulping and clarifying body 31 for slurry transportation. The filter mud tank 42 is connected to the recovery slurry tank 5 through a recovery pipe 43, and a recovery slurry pump 44 is provided on the recovery pipe 43.

[0040] After clarification, the slurry is transported to the filter mud tank 42 through the slurry guide pipe 41 of the flow filtration mechanism 4. After the filter mud tank 42 filters the slurry, the control module (indirect linkage, combined with the control logic above) controls the recovery slurry pump 44 on the recovery pipe 43 to start, and transports the qualified slurry in the filter mud tank to the recovery slurry pool 5 through the recovery pipe 43.

[0041] In addition, the filter mud tank 42 is provided with a mud-blocking filter screen 421, and the filter mud tank 42 is provided with a rotating shaft 422. The two ends of the rotating shaft 422 are provided with swirling swing rods 423 for conveying the slurry toward the bottom of the filter mud tank 42. The bottom of the filter mud tank 42 is provided with an inclined guide platform 424. The outer wall of the filter mud tank 42 is provided with a discharge hole 425, and the discharge hole 425 is connected to the aforementioned slurry guide pipe 41.

[0042] In summary, the principle of this embodiment is as follows: the overflow white water from the paper machine enters the white water collection tank 1 through the arc-shaped inlet 16. The control module 8 regulates the white water pump 22 on the guide pipe 21 to transport the white water to the pulping and clarifying unit 3's pulping and clarifying body 31. At the same time, the pneumatic regulating valve 24 on the flocculant inlet pipe 23 is adjusted to precisely control the amount of flocculant added. The pulping and clarifying unit 31 controls the gas inlet and outlet through the upper air inlet valve 32 and the vacuum pump 33 regulates the internal air pressure to ensure a stable liquid level. The control module 8 controls the drain valve 6. 2. Opening and closing: Excess white water in the pulping and clarifying unit 31 is transported to the long fiber turbid white water tank 7 through the white water drain pipe 61, and the liquid level is dynamically adjusted. After clarification, the pulp enters the filter mud tank 42 through the pulp guide pipe 41 of the flow guiding and filtering mechanism 4. After impurities are filtered by the mud-blocking filter screen 421, it is pushed to the bottom by the swirling swing rod 423 driven by the rotating shaft 422. Under the guidance of the inclined guide platform 424, it flows from the discharge hole 425 into the pulp guide pipe 41, and finally is transported to the recovery pulp tank 5 through the recovery pulp pump 44 on the recovery pipe 43.

[0043] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0044] Although this paper uses a lot of terms such as white water collection tank 1, flow guide 11, flow guide seat 12, telescopic connecting rod 13, anti-splash pressure plate 14, lifting adjustment motor 15, arc-shaped water inlet 16, drain hole 17, flow guide control mechanism 2, flow guide pipe 21, white water pump 22, flocculant inlet pipe 23, pneumatic regulating valve 24, pulp clarifier assembly 3, pulp clarifier body 31, air inlet valve 32, vacuum pump 33, water inlet hole 34, flow guide filtration mechanism 4, pulp guide pipe 41, filter mud tank 42, mud-blocking filter screen 421, rotating shaft 422, vortex swing rod 423, guide platform 424, discharge hole 425, recovery pipe 43, recovery pulp pump 44, recovery pulp pool 5, linkage drainage structure 6, white water drain pipe 61, drain valve 62, long fiber turbid white water pool 7, control module 8, etc., the possibility of using other terms cannot be ruled out. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any kind of additional limitation would be contrary to the spirit of this utility model.

Claims

1. A low-carbon intelligent control device for white water recycling, comprising a white water collection tank (1) for collecting white water overflowing from a paper machine, characterized in that, The white water collection tank (1) is connected to the pulping and clarifying unit (3) through the flow control mechanism (2). The pulping and clarifying unit (3) is connected to the recovery pulp tank (5) through the flow filtration mechanism (4). The pulping and clarifying unit (3) is connected to the long fiber turbid white water tank (7) through the linkage drainage structure (6) for white water transportation. The linkage drainage structure (6), the pulping and clarifying unit (3) and the flow control mechanism (2) are connected to the control module (8) to adjust the liquid level of the pulping and clarifying unit (3).

2. The intelligent control device for low-carbon white water recycling according to claim 1, characterized in that, The white water collection tank (1) has several flow guides (11) arranged in a ring on the inner side of the upper circumference, and a flow guide seat (12) is provided inside the white water collection tank (1). The flow guides (11) extend toward the flow guide seat (12), and the bottom of the flow guide seat (12) is connected to an anti-splash pressure plate (14) through a telescopic connecting rod (13).

3. The intelligent control device for low-carbon white water recycling according to claim 2, characterized in that, The diameter of the guide seat (12) gradually increases from top to bottom, and the bottom of the white water collection tank (1) is connected to a lifting adjustment motor (15). The output end of the lifting adjustment motor (15) is connected to the anti-splash pressure plate (14). The upper surface of the white water collection tank (1) is provided with several arc-shaped water inlets (16), and the bottom of the white water collection tank (1) is provided with a drain hole (17).

4. The intelligent control device for low-carbon white water recycling according to claim 3, characterized in that, The flow guide (11) is composed of several flow guide branches, and the flow guide branches are rotatably arranged with the inner wall of the white water collection tank (1), and the swing angle is adjusted as the flow guide seat (12) rises and falls.

5. The intelligent control device for low-carbon white water recycling according to claim 3, characterized in that, The flow control mechanism (2) includes a flow guide pipe (21), one end of which is connected to a drain hole (17) and the other end is connected to a pulping and clarifying unit (3). The flow guide pipe (21) is equipped with a white water pump (22) for pumping white water from the white water collection tank (1) to the pulping and clarifying unit (3). The white water pump (22) is connected to the control module (8).

6. The intelligent control device for low-carbon white water recycling according to claim 5, characterized in that, The guide pipe (21) is connected to a flocculant inlet pipe (23) at one end near the pulp clarifier. A pneumatic regulating valve (24) is provided on the flocculant inlet pipe (23), and the pneumatic regulating valve (24) is connected to the control module (8).

7. The intelligent control device for low-carbon white water recycling according to claim 6, characterized in that, The pulp clarifier assembly (3) includes a pulp clarifier body (31), an air inlet valve (32) is connected to the upper end of the pulp clarifier body (31), and a vacuum pump (33) is also provided at the upper end of the pulp clarifier body (31). The lower end of the pulp clarifier body (31) is provided with a water inlet hole (34) connected to the guide pipe (21).

8. The intelligent control device for low-carbon white water recycling according to claim 7, characterized in that, The linkage drainage structure (6) includes a white water drain pipe (61), and a drain valve (62) is provided on the white water drain pipe (61). The drain valve (62) is connected to the control module (8).

9. The intelligent control device for low-carbon white water recycling according to claim 7, characterized in that, The flow guiding and filtering mechanism (4) includes a slurry guide pipe (41), one end of which is connected to a filter mud tank (42) and the other end is connected to the main body (31) of the pulping and clarifying device for slurry transport. The filter mud tank (42) is connected to the recovery slurry tank (5) through a recovery pipe (43), and a recovery slurry pump (44) is provided on the recovery pipe (43).

10. The intelligent control device for low-carbon white water recycling according to claim 9, characterized in that, The filter mud tank (42) is provided with a mud-blocking filter screen (421) and a rotating shaft (422) is provided in the filter mud tank (42). The rotating shaft (422) is provided with swirling swing rods (423) at both ends for conveying slurry toward the bottom of the filter mud tank (42). The bottom of the filter mud tank (42) is provided with an inclined guide platform (424). The outer wall of the filter mud tank (42) is provided with a discharge hole (425), and the discharge hole (425) is connected to the slurry guide pipe (41) mentioned above.

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