Carbon fiber stock solution distributor

Abstract

The utility model discloses a carbon fiber stock solution distributor and belongs to the technical field of carbon fiber production equipment. A temperature transmitter and a liquid level transmitter are installed on the two sides of the distribution body respectively and used for real-time monitoring, and in order to improve the reliability and stability of the system, the two transmitters can be verified mutually and used for detecting the consistency of spinning solutions on the two sides in the distribution body; the flow baffle is arranged in the distribution main body, so that the flow speed of the feeding stock solution at the upper part can be reduced, the disturbance of the stock solution to the spinning stock solution in the distribution main body is reduced as much as possible, and the spinning stock solution in the distribution main body can uniformly flow into each distribution branch pipe; each pipeline of the distribution branch pipe has the same length and diameter to ensure that the flow resistance of fluid in each pipeline is the same, so that the consistency of the fluid speed is ensured, and the inner surface of the distribution branch pipe is provided with arrayed circular bulges, so that the high-viscosity fluid close to the edge of the branch pipe is disturbed, the heat exchange efficiency is improved, and the uniform conveying is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of carbon fiber production equipment, and particularly relates to a carbon fiber spinning solution distributor. Background Art

[0002] In the process of carbon fiber preparation, it mainly involves processes such as polymerization, spinning, pre-oxidation, carbonization and graphitization. In the spinning stage, the polymerized spinning solution enters the coagulation bath through a static mixer, and in this process, the spinning solution needs to be distributed to evenly distribute the feed into each coagulation bath; however, there are many deficiencies in the distribution process of carbon fiber spinning solution in the prior art.

[0003] First, there is a phenomenon that the speeds of the high-viscosity spinning solution in the pipe are different. The viscosity of the spinning solution reaches 30,000 - 60,000 mPa·s. According to the analysis of fluid dynamics, the spinning solution near the pipe wall flows very slowly, while the speed of the spinning solution in the center of the pipe is the largest, and the flow speed shows a parabolic distribution, which will have a serious negative impact on the coagulation forming and spinning stability.

[0004] In addition, currently most of the spinning solution distribution adopts a one-to-two or two-to-four type pipeline direct distribution. If the pipeline paths are different, there will be a time difference in the delivery of the spinning solution at different spinning positions of the coagulation bath, and there will be differences in the shear rate and pressure distribution of the spinning solution in the pipeline; the residence times are different, and there will also be differences in the delivery of the spinning solution to each coagulation bath; in order to achieve uniform delivery, the traditional spinning solution distribution will bend the branch pipelines with shorter paths to increase the distance to achieve the purpose of uniform delivery of the spinning solution to the coagulation bath; but this will cause problems such as easy blockage and difficult maintenance, and it is difficult to meet the requirements of high-precision distribution. Summary of the Invention

[0005] The utility model mainly solves the technical problems existing in the above-mentioned prior art, and provides a carbon fiber spinning solution distributor.

[0006] The above technical problems of the utility model are mainly solved by the following technical solutions: A carbon fiber spinning solution distributor includes a distribution main body, two feed nozzles are symmetrically arranged on the distribution main body, a distribution main pipe is connected to each of the two feed nozzles, two baffle plates are arranged at the bottom of the inner cavity of the distribution main body corresponding to the feed nozzles, sealing heads are arranged at both the left and right ends of the distribution main body, and a group of temperature transmitters and liquid level transmitters are arranged on both the left and right sides of the material distribution main body. A plurality of distribution branch pipes are equidistantly connected to the bottom of the distribution main body, a number of circular protrusions are arranged in an array on the inner surface of the distribution branch pipes, and a valve is connected to the lower end of each distribution branch pipe.

[0007] Preferably, the feed nozzle extends into the distribution main body and is connected to it, the baffle plate is semi-circular, and the baffle plate is connected to the distribution main body by welding.

[0008] Preferably, a flange is provided below the distribution main body, the distribution branch pipes are connected to the distribution main body through the flange, the distribution branch pipes are perpendicular to the distribution main body, and the distribution branch pipes are arranged in parallel with the same distance between each other.

[0009] Preferably, the inner wall surface and the welding joints of the distribution main body are polished to reach Ra < 0.4 um to prevent the solution from adhering to the inner wall of the equipment.

[0010] Preferably, the diameter of the feed pipe is 100 mm - 150 mm; the thickness of the feed pipeline is 5 mm - 7 mm; the thickness of the baffle is 5 - 10 mm.

[0011] Preferably, the distributor is made of 316L stainless steel.

[0012] The beneficial effects of the present utility model are as follows:

[0013] Temperature transmitters and liquid level transmitters are respectively installed on both sides of the distribution main body for real-time monitoring. To improve the reliability and stability of the system, the two transmitters can be mutually calibrated to detect the consistency of the spinning dope on both sides in the distribution main body;

[0014] A baffle is provided in the distribution main body, which can reduce the flow rate of the feed dope above, minimize the disturbance of the dope to the spinning dope inside the distribution main body, and ensure that the spinning dope in the distribution main body can flow uniformly into each distribution branch pipe;

[0015] Each pipe of the distribution branch pipe has the same length and diameter to ensure that the flow resistance of the fluid in each pipe is the same, so as to ensure the consistency of the fluid velocity. The inner surface of the distribution branch pipe has arrayed circular protrusions, which can disturb the high-viscosity fluid near the edge of the branch pipe while improving the heat exchange efficiency and ensuring uniform distribution and transportation. Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of the present utility model;

[0017] Figure 2 is a schematic structural diagram of the cutting and stamping mechanism of the present utility model.

[0018] In the figure: 1, distribution main pipe; 2, feed nozzle; 3, baffle; 4, distribution main body; 5, temperature transmitter; 6, liquid level transmitter; 7, distribution branch pipe; 8, valve; 9, circular protrusion; 10, flange. Detailed Embodiments

[0019] The technical solutions of the present utility model will be further specifically described below through embodiments in combination with the drawings.

[0020] Example: A carbon fiber dope dispenser, as Figure 1 - Figure 2 shown, comprising a dispensing body, on which two feed nozzles are symmetrically arranged. One distribution main pipe is connected to each of the two feed nozzles. Two baffle plates are provided at the bottom of the inner cavity of the dispensing body corresponding to the feed nozzles. Sealing heads are provided at both the left and right ends of the dispensing body, and a group of temperature transmitters and liquid level transmitters are provided on both the left and right sides of the material distribution body. A plurality of distribution branch pipes are equidistantly connected to the bottom of the dispensing body. A number of circular protrusions are arrayed on the inner surface of the distribution branch pipes, and a valve is connected to the lower end of each distribution branch pipe.

[0021] The feed nozzle extends into the dispensing body and is interconnected with it. The baffle plate is semi-circular and is connected to the dispensing body by welding; a flange is provided below the dispensing body, and the distribution branch pipe is connected to the dispensing body through the flange. The distribution branch pipe is perpendicular to the dispensing body, and the distribution branch pipes are arranged in parallel, and the distances between the distribution branch pipes are the same.

[0022] The inner wall surface and the welding joints of the dispensing body are polished to reach Ra < 0.4 um to prevent the solution from adhering to the inner wall of the equipment; the diameter of the feed pipe is 100 mm - 150 mm; the thickness of the feed pipe is 5 mm - 7 mm; the thickness of the baffle plate is 5 - 10 mm; the dispenser is made of 316L stainless steel.

[0023] Principle of the utility model: The stock solution distributor is vertically installed and equipped with a hot water jacket to maintain the temperature of the stock solution between 65 - 70 °C. The spinning stock solution enters the main distribution pipe 1 after passing through the static mixer. The main distribution pipe 1 is connected to the feed nozzle 2 of the distribution body 4. The bottom of the feed nozzle 2 extends into the distribution body 4, and the stock solution enters the distribution body 4 through the feed nozzle 2. A temperature transmitter 5 and a liquid level transmitter 6 are installed on the distribution body 4 to transmit the material conditions inside the distributor to the DCS system for real-time monitoring. To improve the reliability and stability of the system, two identical transmitters are installed on both sides. Even if one of them fails, the other can still continue to work to ensure the continuity of monitoring. In addition, the two transmitters can be calibrated with each other to ensure the accuracy of the measurement results. If the values of the two transmitters differ greatly, it may indicate that there is a problem with one of the transmitters for timely repair. The distribution body 4 is composed of an elliptical head and a cylindrical barrel. Compared with a cuboid body, the inner wall with a curvature of the cylindrical barrel can effectively guide the fluid flow to the bottom. Baffles 3 are provided in the distribution body 4, and each pair of baffles 3 is spaced 170 mm apart, which can reduce the flow rate of the incoming stock solution above, minimize the disturbance of the stock solution inside the distribution body 4 to the spinning stock solution as much as possible, and ensure that the spinning stock solution inside the distribution body 4 can flow uniformly into each distribution branch pipe 7. The spinning stock solution of the distribution body 4 enters the distribution branch pipe 7. The distribution branch pipe 7 is connected to the distribution body 4 through a flange, which is convenient for removing the distribution branch pipe 7 for cleaning during regular maintenance. Each pipe of the distribution branch pipe 7 has the same length and diameter to ensure that the flow resistance of the fluid in each pipe is the same, thus ensuring the consistency of the fluid velocity. Due to the array of circular protrusions on the inner surface of the distribution branch pipe 7, the highly viscous fluid near the edge of the branch pipe is disturbed while the heat transfer efficiency is improved. The end of the distribution branch pipe 7 is a valve, which can adjust the flow rate and cut off the material according to the production needs. Through the stock solution distributor, the high-viscosity stock solution can be evenly transported to each coagulation bath while avoiding complex pipelines, ensuring the uniform pressure and distribution of the spinning stock solution transportation, and providing a basis for the uniformity of the final tow.

[0024] Finally, it should be pointed out that the above embodiments are only relatively representative examples of the utility model. Obviously, the utility model is not limited to the above embodiments and there can be many variations. Any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the utility model shall be considered as belonging to the protection scope of the utility model.

Claims

1. A carbon fiber stock liquid dispenser, comprising a dispensing body, characterized in that: Two feed nozzles are symmetrically provided on the distribution body, and each of the two feed nozzles is connected to a distribution main pipe. Two baffles are provided at the bottom of the inner cavity of the distribution body corresponding to the feed nozzles. Both left and right ends of the distribution body are provided with heads, and both left and right sides of the distribution body are provided with a group of temperature transmitters and liquid level transmitters. A plurality of distribution branches are equidistantly connected to the bottom of the distribution body, and a plurality of circular protrusions are arranged in an array on the inner surface of the distribution branch, and a valve is connected to the lower end of each distribution branch.

2. The carbon fiber stock solution dispenser according to claim 1, characterized in that: The feed nozzle penetrates into the distribution body and is communicated with the distribution body. The baffle is semicircular and is connected to the distribution body by welding.

3. The carbon fiber stock solution dispenser according to claim 1, characterized in that: A flange is provided below the distribution body, and the distribution branch pipes are connected to the distribution body through the flange. The distribution branch pipes are perpendicular to the distribution body, and the distribution branch pipes are arranged in parallel with each other, and the spacing between the distribution branch pipes is the same.

4. The carbon fiber stock solution dispenser according to claim 1, characterized in that: The inner wall and welding parts of the distribution body are polished to Ra<0.4 um to prevent the solution from adhering to the inner wall of the equipment.

5. The carbon fiber stock solution dispenser according to claim 1, characterized in that: The diameter of the feed pipe is 100 mm to 150 mm; the thickness of the feed pipe is 5 mm to 7 mm; and the thickness of the baffle is 5 mm to 10 mm.

6. The carbon fiber stock solution dispenser according to claim 1, characterized in that: The dispenser is made of 316L stainless steel.

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