Pressure-stabilizing water delivery control and regulation device for washing polyacrylonitrile precursor

Abstract

The utility model relates to a pressure-stabilizing water delivery control and regulation device for polyacrylonitrile precursor washing. The pressure-stabilizing water delivery control and regulation device comprises a main pipeline pressure control system, a buffer pressure regulation device and a multi-stage flow control system, the main pipeline pressure control system comprises a desalted water main pipeline and a flow control device; the buffer pressure adjusting device comprises a temporary storage tank, a flow control device, a liquid level meter, an electric pressure stabilizing pump and a pressure gauge; the multi-stage flow control system comprises a plurality of reducing pipelines, a flow control device and a control panel. The buffer pressure adjusting device and the multi-stage flow control system are additionally arranged and matched with the main pipeline pressure control system to achieve synchronous water delivery and supply or replace the main pipeline pressure control system to supply water; the multi-stage flow control system can adjust the flow of a pipeline by using a variable-diameter pipeline, reduce pressure loss and pipe wall effect, and enable a pipeline system to have better stability and control performance, thereby improving the water delivery stability in the processes of washing water traction and the like; and the control panel is additionally arranged, so that the automatic control of flow adjustment is realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of carbon fiber manufacturing, and particularly relates to a pressure-stabilizing water supply control and regulation device for washing polyacrylonitrile precursor. Background Art

[0002] Carbon fiber is a polymer fiber material with a carbon content of over 90%. It has the characteristics of high strength, high modulus, acid and alkali resistance, and corrosion resistance. It is widely used in aerospace, transportation rail, new energy and other fields. High-strength and high-modulus carbon fiber has ultra-high stiffness, excellent specific modulus, good environmental stability and dimensional stability. The production process of PAN carbon fiber goes through polymerization, spinning, heat treatment, carbonization and other processes. However, the production cost of the precursor accounts for 50-60% of the total cost of carbon fiber. Reducing the waste of sulfoxide solvent requires advanced water washing and water drawing processes to reduce the residual sulfoxide in the precursor.

[0003] The traditional desalted water delivery system has a long water delivery distance, unstable pressure, and frequent fluctuations, making it difficult to achieve precise control of the water flow and temperature of the washing water, which affects the washing water effect and is not conducive to the reduction of sulfoxide solvents. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a pressure-stabilized water supply control and adjustment device for washing polyacrylonitrile raw yarn. By adding a buffer pressure adjustment device and a multi-stage flow control system, it cooperates with the main pipeline pressure control system to achieve synchronous water supply, or can directly replace the main pipeline pressure control system, thereby improving the stability of water supply during washing and drawing processes and reducing the impact of high water flow dispersion on the performance of washed yarn. By adding a variable diameter pipe, the device can better adjust the flow rate and reduce pressure loss. The multi-stage flow control system can be centrally and automatically controlled by a control panel.

[0005] The technical solutions for achieving the purpose of this utility model are as follows:

[0006] A pressure-stabilized water supply control and regulation device for washing polyacrylonitrile raw silk, comprising

[0007] Main pipeline pressure control system;

[0008] The main pipeline pressure control system includes a desalted water main pipeline and a flow control device 1;

[0009] Flow control device 1 includes flow meter and pneumatic valve group;

[0010] The desalted water main pipeline is connected to the water washing tank and the water pulling tank device respectively through the flow control device;

[0011] Buffer pressure regulating device;

[0012] The buffer pressure regulating device includes a temporary storage tank, a second flow control device, a liquid level gauge, an electric pressure-stabilizing pump and a pressure gauge; a second flow control device is provided between the temporary storage tank and the desalted water main pipeline, a liquid level gauge is provided on the top of the temporary storage tank; the bottom of the temporary storage tank is connected to the electric pressure-stabilizing pump, and the electric pressure-stabilizing pump is connected to the pressure gauge;

[0013] Multi-stage flow control system;

[0014] The multi-stage flow control system includes a plurality of variable diameter pipes and a flow control device 3; the variable diameter pipes are arranged between the temporary storage tank and the flow control device 3; one end of the flow control device 3 is connected to the electric pressure regulating pump, and the other end is connected to the water washing tank and the water pulling tank;

[0015] A buffer pressure regulating device and a multi-stage flow control system are set up to cooperate with the main pipeline pressure control system for synchronous water transmission and supply.

[0016] Furthermore, the flow control device includes at least one set of flow meters and a pneumatic valve group.

[0017] Furthermore, a one-way stop valve is provided between the desalted water main pipeline and the flow control device 1.

[0018] Furthermore, the temporary storage tank in the buffer pressure regulating device is connected to the desalted water main pipeline through the flow control device 2; the liquid level of the temporary storage tank is controlled by the flow regulating device 2 and the liquid level meter; the flow control device 2 includes at least a flow meter and a pneumatic valve group.

[0019] Furthermore, the temporary storage tank is connected to the water washing tank and the water pulling tank device through a passage composed of at least two pressure gauges and an electric pressure-stabilizing pump through a flow control device three.

[0020] Furthermore, the pressure gauge and the electric pressure stabilizing pump of the buffer pressure regulating device are selected to have an operating pressure range of 0 to 0.6 MPa.

[0021] Furthermore, the multi-stage flow control system is also provided with a control panel.

[0022] Furthermore, the diameter of the desalted water main pipeline is DN50, the diameter of the desalted water main pipeline to the temporary storage tank is DN40, and the diameter of the flow control device 1 to the water washing tank and the water pulling tank is DN25; in the variable diameter pipeline, the diameter of the pipe from the temporary storage tank to the electric pressure stabilizing pump is DN50, and the diameter of the pipe from the electric pressure stabilizing pump to the flow regulating device 3 is DN40.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) by adding a buffer pressure regulating device and a multi-stage flow control system, water supply can be synchronized with the main pipeline pressure control system, or the main pipeline pressure control system can be replaced for water supply, thereby improving the water supply stability in processes such as water washing and water drawing, and reducing the influence of high water flow dispersion on the performance of water-washed silk; (2) the device can better regulate the flow and reduce pressure loss by adding an electric pressure-stabilizing pump and a variable-diameter pipe; (3) the multi-stage flow control system is centrally and automatically controlled by the control panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a structural diagram of the pressure-stabilizing water supply control and regulation device.

[0025] 1: Flow meter; 2: Pneumatic valve group; 3: Pressure gauge; 4: Electric pressure-stabilizing pump; 5: Liquid level gauge; 6: Temporary storage tank; 7: One-way stop valve; 8: Variable diameter pipe. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0027] The utility model provides a pressure-stabilized water delivery control and adjustment device, which mainly solves the problem that the water volume in the main pipeline of the existing water washing and water pulling water delivery device fluctuates greatly and frequently during long-distance water delivery, the pneumatic valve is not sensitive enough to cope with it, and the water washing and water pulling effect is poor. The utility model provides a pressure-stabilized water delivery control and adjustment device, which includes a main pipeline pressure control system, a buffer pressure adjustment device and a multi-stage flow control system; the main pipeline pressure control system includes a desalted water main pipeline and a flow control device; the buffer pressure adjustment device includes a temporary storage tank, a flow control device, a liquid level meter, an electric pressure-stabilizing pump, and a pressure gauge; the multi-stage flow control system includes multiple variable diameter pipelines, a flow control device and a control panel; the flow control device is composed of at least one flow meter and a pneumatic valve group; the main pipeline pressure control system and the buffer pressure adjustment device are connected through the same diameter pipeline via the flow control device; the buffer pressure adjustment device and the multi-stage flow control system are connected through the variable diameter pipeline via the electric pressure-stabilizing pump.

[0028] Specifically provide a pressure-stabilized water delivery control and regulation device, see Figure 1 ,include

[0029] Main pipeline pressure control system;

[0030] The main pipeline pressure control system includes a desalted water main pipeline and a flow control device 1;

[0031] Flow control device 1 includes flow meter 1 and pneumatic valve group 2;

[0032] The desalted water main pipeline is connected to the water washing tank and the water pulling tank device respectively through the flow control device;

[0033] Buffer pressure regulating device;

[0034] The buffer pressure regulating device includes a temporary storage tank 6, a second flow control device, a liquid level gauge 5, an electric pressure-stabilizing pump 4, and a pressure gauge 3; a second flow control device is provided between the temporary storage tank 6 and the desalted water main pipeline, and a liquid level gauge 5 is provided on the top of the temporary storage tank 6; the bottom of the temporary storage tank 6 is connected to the electric pressure-stabilizing pump 4, and the electric pressure-stabilizing pump 4 is connected to the pressure gauge 3;

[0035] Multi-stage flow control system;

[0036] The multi-stage flow control system includes a plurality of variable diameter pipes 8 and a flow control device 3; the variable diameter pipe 8 is arranged between the temporary storage tank 6 and the flow control device 3; one end of the flow control device 3 is connected to the electric pressure regulating pump 4, and the other end is connected to the water washing tank and the water pulling tank;

[0037] A buffer pressure regulating device and a multi-stage flow control system are set up to cooperate with the main pipeline pressure control system for synchronous water transmission and supply.

[0038] The flow control device includes at least one flow meter 1 and a pneumatic valve group 2.

[0039] A one-way stop valve 7 is provided between the desalted water main pipeline and the flow control device 1.

[0040] The temporary storage tank 6 in the buffer pressure regulating device is connected to the desalted water main pipeline through the flow control device 2;

[0041] The liquid level of the temporary storage tank 6 is controlled by a second flow regulating device and a liquid level meter 5 ; the second flow control device comprises at least a flow meter 1 and a pneumatic valve group 2 .

[0042] The temporary storage tank 6 is connected to the water washing tank and the water pulling tank device through a passage formed by at least two pressure gauges 3 and an electric pressure-stabilizing pump 4 and a flow control device 3.

[0043] The pressure gauge 3 and the electric pressure-stabilizing pump 4 of the buffer pressure regulating device are selected to have an operating pressure range of 0 to 0.6 MPa.

[0044] The multi-stage flow control system is also provided with a control panel.

[0045] The diameter of the desalted water main pipeline is DN50, the diameter of the desalted water main pipeline to the temporary storage tank 6 is DN40, and the diameter of the flow control device 1 to the water washing tank and the water pulling tank is DN25; in the reducing pipe 8, the diameter of the pipe from the temporary storage tank 6 to the electric pressure-stabilizing pump 4 is DN50, and the diameter of the pipe from the electric pressure-stabilizing pump 4 to the flow regulating device 3 is DN40.

[0046] The main pipeline pressure control system and the buffer pressure regulating device are connected through the same diameter pipeline via the flow control device. The desalted water in the temporary storage tank 6 is replenished in time to a stable control liquid level according to the water demand, ensuring a stable supply of desalted water to the water washing tank and the water pulling tank.

[0047] The pressure-stabilized water delivery control and adjustment device controls the flow fluctuation range within ±5L / h after multiple diameter changes. The control process is as follows: the desalted water main pipeline controls the flow fluctuation through pressure, and the flow fluctuation range is ±100L / h.

[0048] The buffer pressure regulating device is connected to the multi-stage flow control system through the variable diameter pipe 8 via the electric pressure stabilizing pump 4; the multi-stage flow control system is displayed and centrally automatically controlled by the control panel, controls the electric pressure stabilizing pump 4 to output stably, and is connected to the flow control device through multiple variable diameter pipes 8 to adjust the flow, thereby reducing pressure loss and pipe wall effect, and making the pipeline system have better stability and control performance; when the main pipeline pressure control is unstable or fails, the buffer pressure regulating device and the multi-stage flow control system cooperate with the main pipeline pressure control system to achieve synchronous water supply, or can replace the main pipeline pressure control system to stabilize water supply, thereby reducing the instability of the long-distance water supply of the desalted water main pipeline and the influence of high water flow dispersion on the water washing water drawing performance.

Claims

1. A pressure-stabilized water supply control and adjustment device for washing polyacrylonitrile precursor, characterized in that: include Main pipeline pressure control system; The main pipeline pressure control system includes a desalted water main pipeline and a flow control device 1; The flow control device comprises a flow meter (1) and a pneumatic valve group (2); The desalted water main pipeline is connected to the water washing tank and the water pulling tank device respectively through the flow control device; Buffer pressure regulating device; The buffer pressure regulating device comprises a temporary storage tank (6), a second flow control device, a liquid level gauge (5), an electric pressure stabilizing pump (4) and a pressure gauge (3); the second flow control device is provided between the temporary storage tank (6) and the desalted water main pipeline, and the liquid level gauge (5) is provided on the top of the temporary storage tank (6); the bottom of the temporary storage tank (6) is connected to the electric pressure stabilizing pump (4), and the electric pressure stabilizing pump (4) is connected to the pressure gauge (3); Multi-stage flow control system; The multi-stage flow control system comprises a plurality of variable diameter pipes (8) and a flow control device 3; the variable diameter pipes (8) are arranged between the temporary storage tank (6) and the flow control device 3; one end of the flow control device 3 is connected to the electric pressure regulating pump (4), and the other end is connected to the water washing tank and the water pulling tank; A buffer pressure regulating device and a multi-stage flow control system are set up to cooperate with the main pipeline pressure control system for synchronous water transmission and supply.

2. The pressure-stabilized water delivery control and adjustment device according to claim 1, characterized in that: The flow control device comprises at least one set of flow meters (1) and a pneumatic valve group (2).

3. The pressure-stabilized water delivery control and adjustment device according to claim 1, characterized in that: A one-way stop valve (7) is provided between the desalted water main pipeline and the flow control device 1.

4. The pressure-stabilized water delivery control and adjustment device according to claim 1, characterized in that: The temporary storage tank (6) in the buffer pressure regulating device is connected to the desalted water main pipeline through the second flow control device; the temporary storage tank (6) controls the liquid level through the second flow control device and the liquid level meter (5); the second flow control device at least includes a flow meter (1) and a pneumatic valve group (2).

5. The pressure-stabilized water delivery control and adjustment device according to claim 4, characterized in that: The temporary storage tank (6) is connected to the water washing tank and the water pulling tank device through a passage composed of at least two pressure gauges (3) and an electric pressure-stabilizing pump (4) through a flow control device 3.

6. The pressure-stabilized water delivery control and adjustment device according to claim 4, characterized in that: The pressure gauge (3) and the electric pressure-stabilizing pump (4) of the buffer pressure regulating device are selected to have a working pressure range of 0 to 0.6 MPa.

7. The pressure-stabilized water delivery control and adjustment device according to claim 1, characterized in that: The multi-stage flow control system is also provided with a control panel.

8. The pressure-stabilized water delivery control and adjustment device according to claim 1, characterized in that: The diameter of the desalted water main pipeline is DN50, the diameter of the desalted water main pipeline to the temporary storage tank (6) is DN40, and the diameter of the flow control device 1 to the water washing tank and the water pulling tank is DN25; in the reducing pipe (8), the diameter of the pipe from the temporary storage tank (6) to the electric pressure-stabilizing pump (4) is DN50, and the diameter of the pipe from the electric pressure-stabilizing pump (4) to the flow regulating device 3 is DN40.

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