Layering device and method for automatically measuring and controlling carbon fiber solvent interface

Abstract

The invention relates to the technical field of carbon fiber chemical equipment, in particular to a layering device capable of automatically measuring and controlling a carbon fiber solvent interface position, the device comprises a layering device, a layering interface control unit and a split-flow adjusting balancer, the split-flow adjusting balancer comprises a box body, a piston body and an air cylinder driving the piston body to move in a reciprocating mode, the box body is provided with a first position adjusting hole, a second position adjusting hole and a third position adjusting hole which are all communicated with the water outlet hole, the piston body is provided with a first water inlet hole communicated with the first position adjusting hole and a second water inlet hole communicated with the second position adjusting hole, and the layered interface control unit is electrically connected to a DCS control system. The method is used for detecting the height of the layered interface to control the air inflow of the cylinder to adjust the height of the layered interface. The device simplifies the process flow of solvent separation, reduces the risk of acrylonitrile leakage, and ensures the safety of workers; through intelligent detection and mechanical lock control, a layered interface is accurately controlled, and the solvent recovery quality and recovery efficiency are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of carbon fiber chemical equipment, and in particular relates to a delamination device and method for automatically measuring and controlling the interface of a carbon fiber solvent. Background Art

[0002] The solvent recovery device of the carbon fiber precursor production line is used to separate and purify the components of the aqueous solution containing acrylonitrile and dimethyl sulfoxide produced by the polymerization device in the stripping concentration process and the washing process, and the dimethyl sulfoxide aqueous solution produced by the spinning device in the coagulation bath process and the water washing process, so as to obtain dimethyl sulfoxide and acrylonitrile.

[0003] The solvent recovery device mainly includes an acrylonitrile removal system, a three-stage dehydration system, a dimethyl sulfoxide purification system, a high-boiling product removal system and a solvent storage system. Among them, the acrylonitrile removal system is mainly composed of a plate distillation tower, a heat exchanger, a separator, a container for storing separated water and recovering acrylonitrile, and a pump for conveying the medium. The working principle of the acrylonitrile removal system is to adopt a negative pressure distillation process. Since the boiling point of acrylonitrile is much lower than that of water and dimethyl sulfoxide, most of the gaseous acrylonitrile and water vapor are distilled from the upper part of the distillation tower as light components of the distillation tower, and are condensed into liquid by heat exchange in the condenser and enter the separator. According to the characteristics of acrylonitrile having a lower density than water and being slightly soluble in water, acrylonitrile and water are separated by static stratification, and the acrylonitrile on the upper layer of the separator and the water on the lower layer flow into their respective storage containers.

[0004] Since both acrylonitrile and water in the separator flow into respective storage containers by overflow, it is very important to control the interface between acrylonitrile and water in the separator.

[0005] At present, the interface of the delamination device equipped with the solvent recovery device in the carbon fiber industry is manually controlled. Figure 1 The stratifier 1 is provided with a liquid inlet 11, a water outlet 12, an overflow hole 14 and an air pressure balance hole 13. The water outlet 12 is provided with a first conduit 33, a first hose 30 connected to the first conduit 33 and a three-way pipe joint 36, a third hose 32 on the three-way pipe joint 36, a water storage tank 35 connected to the third hose 32 and a three-way pipe joint 36. The air pressure balance hole 13 is provided with a second conduit 34 and a second hose 31 connected to the second conduit 34. The first hose 30 and the third hose 32 are respectively connected to the straight end of the three-way pipe joint 36, the second hose 31 is connected to the right angle end of the three-way pipe joint 36, and the height of the first hose 30 is consistent with the height of the third hose 32.

[0006] The mixed liquid of acrylonitrile and water flows into the stratifier 1 from the liquid inlet 11, and the acrylonitrile and water are statically stratified in the stratifier 1. The upper layer is acrylonitrile liquid, which flows into the acrylonitrile storage tank through the overflow hole 14, and the lower layer is water, which flows into the first hose 30 and the third hose 32 through the water outlet 12. In order to prevent the acrylonitrile liquid from accidentally flowing out of the water outlet 12 and the water from accidentally flowing out of the overflow hole 14, the first hose 30 and the third hose 32 are raised or lowered by manually moving the three-way pipe joint 36 to adjust the height of the stratification interface.

[0007] The existing method of manually controlling the height adjustment of the hose needs to ensure that the first hose 30, the second hose 31 and the third hose 32 have sufficient adjustment margins. In workshop production, it not only takes up a large space, but the hose is also a wearing part and needs to be regularly inspected and replaced. Acrylonitrile is a flammable liquid. Once leaked, its vapor and air can form an explosive mixture and release toxic gases, which directly affect the life safety of workshop workers. In addition, manually adjusting the height of the stratified interface not only increases the labor intensity of the operator, but also has low efficiency. In particular, when the stratified interface is not controlled in time, it is very easy to cause the stratified interface to fluctuate beyond the safety range, thereby causing serious consequences such as solution overflow and uneven mixing, posing a severe challenge to the recovery safety and recovery quality of the solution, and its potential risks cannot be ignored.

[0008] Therefore, in order to solve the above technical problems, exploring and breaking through the existing stratified recovery method and improving the quality and safety of solution recovery have become technical issues that urgently need to be solved. Summary of the invention

[0009] In order to overcome the limitations of existing technologies, reduce the fluctuation of the floating value of the stratified interface, improve the solvent recovery quality of the carbon fiber precursor production line, simplify the process flow of solution separation, improve the solvent recovery efficiency, reduce the labor intensity of operators, and ensure the life safety of workshop workers.

[0010] The present application provides a delamination device and method for automatically measuring and controlling the interface of carbon fiber solvent and a cleaning method using the following technical solutions:

[0011] A delaminating device for automatically measuring and controlling the interface position of carbon fiber solvent, comprising a delaminating device, a flow diversion regulating balancer connected to the delaminating device, the delaminating device being provided with a liquid inlet hole for an acrylonitrile aqueous solution, a water outlet hole connected to the flow diversion regulating balancer, a pressure balancing hole and an overflow hole for diverting acrylonitrile, the flow diversion regulating balancer comprising a box body, a piston assembly slidably connected to the box body and a driving member for driving the piston assembly to reciprocate up and down, the peripheral wall of the box body being provided with a first adjusting hole, a second adjusting hole and a third adjusting hole in sequence from high to low along its height direction, the first adjusting hole, the second adjusting hole and the third adjusting hole being all connected to the water outlet hole, the piston assembly comprising a piston body, the piston body dividing the box body into an upper cavity and a lower cavity, the piston body being provided with a plurality of holes connected to the The upper cavity and the lower cavity have pressure relief holes, the piston body is provided with a first water inlet hole connecting the first adjustment hole and the inner cavity of the box body, the piston body is also provided with a second water inlet hole connecting the second adjustment hole and the inner cavity of the box body, the height difference between the first water inlet hole and the second water inlet hole is H1, the height difference between the first adjustment hole and the second adjustment hole is H2, and H1>H2, the layering device is provided with a layering interface control unit for detecting the height of the layering interface, the layering interface control unit includes a tube externally arranged on the side wall of the layering device, a magnetic flap fixed on the tube, both ends of the tube are installed in a direction parallel to the axis of the layering device, and are connected to the inner cavity of the layering device, a floating magnetic capsule is provided in the tube, and the overall density ρ of the floating magnetic capsule ranges from 900kg / m 3 <ρ<1000kg / m 3 The magnetic flap is electrically connected to a DCS control system, and the DCS control system is used to obtain the position height of the floating magnetic capsule and control the movement stroke of the driving member to drive the slider.

[0012] By adopting the above technical solution, the external tube is connected to the acrylonitrile aqueous solution inside the destratifier, so that the stratification interface heights in the tube and the destratifier are consistent. Since the overall density of the floating magnetic capsule is between acrylonitrile and water, the floating magnetic capsule can float between the stratification interfaces. The position of the magnetic pill on the floating magnetic capsule is detected by the magnetic flap to realize the position detection of the stratification interface, and the signal is transmitted to the DCS control system. The DCS control system controls the driving part to move the piston body up and down according to the position of the stratification interface. The height difference between the first water inlet hole and the second water inlet hole is H1, the height difference between the first adjustment hole and the second adjustment hole is H2, and H1-H2>d. When the first water inlet hole in the piston body is connected to the first adjustment hole, the second water inlet hole is prevented from being connected to the second adjustment hole, thereby realizing mechanical interlocking. The water outlet is interconnected with the first adjustment hole, the second adjustment hole and the third adjustment hole. When the stratified interface position of the acrylonitrile aqueous solution is higher than the upper limit of the fluctuation floating value interval, the piston body moves upward to the bottom of the piston body above the third adjustment hole, and the lower water quickly enters the diversion adjustment balancer to reduce the stratified interface height. When the stratified interface height reaches the set range of the fluctuation floating value interval, the piston body moves downward to the second water outlet and connects with the second adjustment hole. Conversely, when the stratified interface position of the acrylonitrile aqueous solution is lower than the set lower limit of the fluctuation floating value interval, the piston body moves downward to the first water inlet of the piston body and connects with the first adjustment hole, and the acrylonitrile aqueous solution in the stratifier begins to be stored. When the stratified interface height reaches the set range of the fluctuation floating value interval, the piston body moves upward to the second water outlet and connects with the second adjustment hole. Through intelligent detection and mechanical interlocking control, the adjustment of the stratified interface height is realized, the labor intensity of workers is eliminated, and the quality and efficiency of solvent recovery are improved; the diversion adjustment balancer replaces the traditional hose and water storage tank, simplifies the process flow of solution separation, reduces the possibility of acrylonitrile leakage, and ensures the life safety of workshop workers.

[0013] Optionally, the piston assembly further comprises a push rod for pushing the piston body to reciprocate, the cross-section of the piston body along its moving direction is H-shaped, the push rod is fixed to one side of the piston body close to the top of the box body, and the driving member is a cylinder.

[0014] By adopting the above technical solution, the H-shaped piston body cross-section reduces the weight of the piston body and the processing cost, and the control of the movement position of the piston body is achieved by controlling the air intake of the cylinder.

[0015] Optionally, the piston body includes a ring body and a support plate fixed to the ring body, the pressure relief hole is opened on the support plate, the first water inlet hole and the second water inlet hole are opened on the peripheral wall of the ring body, and the push rod is fixed to the support plate.

[0016] By adopting the above technical solution, the support plate is fixed between the ring bodies, the thickness and weight of the support plate are reduced, and the processing cost is saved.

[0017] Optionally, a magnetic pill is provided on the outer wall of the floating magnetic capsule, and when the floating magnetic capsule moves up and down, the data transmitted by the magnetic flap through magnetic coupling is transmitted to the DCS control system in the form of electrical signals.

[0018] By adopting the above technical scheme, since the overall density of the floating magnetic capsule is between acrylonitrile and water, the floating magnetic capsule can float between the layered interfaces. The position of the magnetic balls of the floating magnetic capsule is detected by the magnetic flip plate to realize the position detection of the layered interface. The magnetic balls are arranged on the periphery of the floating magnetic capsule, which can also reduce the weight of the floating magnetic capsule and the overall density of the floating magnetic capsule, thereby improving the accuracy of the position detection of the layered interface.

[0019] Optionally, the tube is made of stainless steel, the floating magnetic capsule is made of polyester fiber, the magnetic pill is made of iron, and the outer surface of the magnetic pill is plated with polyester fiber to form a corrosion-resistant layer.

[0020] By adopting the above technical solution, the corrosion-resistant layer is electroplated on the periphery of the magnetic pill to prevent the magnetic pill from being corroded by the acrylonitrile aqueous solution, thereby preventing the acrylonitrile aqueous solution from being contaminated, thereby improving the recovery quality of solvent purification.

[0021] Optionally, the diameter of the floating magnetic capsule is d1, the height of the floating magnetic capsule is h1, and the inner diameter of the tube is d2, and the relationship between the three is: h1>d2>1.2d1.

[0022] By adopting the above technical solution, the height of the floating magnetic capsule is greater than the diameter of the tube, which reduces the probability of the floating magnetic capsule flipping in the tube. The inner diameter of the tube is greater than 1.2 times the diameter of the floating magnetic capsule, which reduces the probability of the floating magnetic capsule rubbing against the inner wall of the tube when moving up and down, thereby improving the detection accuracy of the stratified interface position.

[0023] Optionally, the thickness of the floating magnetic capsule is 0.03 mm to 0.05 mm.

[0024] By adopting the above technical solution, the influence of the material density of the floating magnetic capsule on the layered interface detection is reduced, and the accuracy of the layered interface position detection is improved.

[0025] Optionally, the floating magnetic capsule is oval in shape.

[0026] By adopting the above technical solution, the oval floating magnetic capsule structure has strong impact resistance and structural stability.

[0027] Optionally, the floating magnetic capsule is filled with acrylonitrile, and the liquid injection port of the floating magnetic capsule is opened at the top of the floating magnetic capsule.

[0028] By adopting the above technical solution, the risk of leakage of the floating magnetic capsule along the liquid injection port is reduced.

[0029] A method for automatically measuring and controlling the interface position of carbon fiber solvent, S1. The mixed solvent flows into the delamination device along the liquid inlet hole to perform static delamination; S2. The delamination interface control unit detects the position of the floating magnetic capsule and outputs it to the DCS control system to monitor the position of the delamination interface, and controls the air intake of the cylinder according to the position of the delamination interface, and controls the delamination interface by moving the piston body up and down; S3. When the moving position of the floating magnetic capsule is within the fluctuation floating value interval, the second adjustment hole is connected to the second water outlet hole, and the first adjustment hole and the second adjustment hole are connected. It is not connected to the inner cavity of the box body; the fluctuation floating value interval is the 1 / 3 section in the middle of the distance from the water outlet to the overflow hole; when the moving position of the floating magnetic capsule is higher than the upper limit of the fluctuation floating value interval, the piston body moves upward, and the third adjustment hole is directly connected to the inner cavity of the box body, and the first adjustment hole and the second adjustment hole are not connected to the inner cavity of the box body; when the moving position of the floating magnetic capsule is lower than the lower limit of the fluctuation floating value interval, the piston body moves downward, and the first adjustment hole is connected to the first water inlet hole, and the second adjustment hole and the third adjustment hole are not connected to the inner cavity of the box body.

[0030] By adopting the above technical scheme, the stratified interface control unit detects the position of the magnetic pills on the floating magnetic capsule through an external magnetic flap to realize the detection of the stratified interface. The optimal working range of the floating magnetic capsule is set to 1 / 3 of the distance between the overflow port and the water outlet (the water outlet is located at 1 / 5 of the total height of the tank, the overflow hole is located at 4 / 5 of the total height of the tank, and the fluctuating floating value range is located at 2 / 5 to 3 / 5 of the total height of the tank). Through intelligent detection and mechanical interlocking control, real-time monitoring and adjustment are carried out to accurately control the stratified interface. Once the position change of the stratified interface is detected, the DCS control system will quickly adjust the stratified interface to the optimal position range according to the fluctuating floating value range, reducing the need for manual intervention, reducing the labor intensity of workers, and avoiding solvent recovery errors and safety hazards caused by human operation, thereby improving the purity of solvent separation at the stratified interface and improving the quality and efficiency of solvent recovery.

[0031] In summary, the present application includes at least one of the following beneficial technical effects:

[0032] 1. Through the intelligent detection and mechanical interlocking control of the position of the magnetic pellets on the floating magnetic capsule by the magnetic flap, real-time monitoring and adjustment can be carried out, the layering interface can be accurately controlled, the labor intensity of workers can be reduced, and the quality and efficiency of solvent recovery can be improved;

[0033] 2. The split flow regulating balancer replaces the traditional hose structure and water storage tank, simplifies the process flow of solvent separation, reduces the risk of acrylonitrile leakage, and ensures the safety of workers;

[0034] 3. The height difference between the first water inlet hole and the second water inlet hole is H1, the height difference between the first adjustment hole and the second adjustment hole is H2, and H1>H2. When the first water inlet hole in the piston body is connected with the first adjustment hole, the second water inlet hole is prevented from being connected with the second adjustment hole, thereby achieving mechanical interlocking and improving the quality of solvent recovery;

[0035] 4. The floating magnetic capsule is filled with acrylonitrile and helium, so that the density of the floating magnetic capsule is between the density of acrylonitrile and water, which is convenient for the magnetic flap to detect the position of the layered interface and avoids solvent recovery errors and safety hazards caused by human operation;

[0036] 5. The oval floating magnetic capsule structure has strong impact resistance and structural stability, which improves the position accuracy of the layered interface;

[0037] 6. The device has the advantages of unique structure, safety, reliability, high efficiency, green environmental protection, and intelligent measurement and control. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the layering interface adjustment structure of a traditional layerer;

[0039] Figure 2 2. It is a schematic structural diagram of a delamination device recovery device of an embodiment;

[0040] Figure 3 is a structural schematic diagram of a flow splitting regulating balancer in an embodiment;

[0041] Figure 4 is a schematic diagram of the structure of the floating magnetic capsule in the embodiment;

[0042] Figure 5 yes Figure 4 AA section view.

[0043] In the figure: 1. stratifier; 11. liquid inlet; 12. water outlet; 13. air pressure balance hole; 14. overflow hole; 15. stratified interface control unit; 16. DCS control system; 17. tube; 171. magnetic pill; 172. floating magnetic capsule; 1721. magnetic capsule plug; 1722. liquid injection port; 173. first mounting part; 174. second mounting part; 18. magnetic flap; 19. tank; 191. tank cover; 2. split flow adjustment balancer; 21. box; 211. first adjustment hole; 212. second adjustment hole Position hole; 213, third position adjustment hole; 214, upper cavity; 215, lower cavity; 22, piston assembly; 221, piston body; 2211, support plate; 22111, pressure relief hole; 2212, ring body; 2213, first water inlet hole; 2214, second water inlet hole; 222, push rod; 23, cylinder; 24, air hole; 25, box cover; 30, first hose; 31, second hose; 32, third hose; 33, first conduit; 34, second conduit; 35, water storage tank; 36, three-way pipe joint. DETAILED DESCRIPTION

[0044] The following is combined with Figure 2-5 This application is described in further detail.

[0045] The present application discloses a delamination device and method for automatically measuring and controlling the interface of carbon fiber solvent.

[0046] Reference Figure 2 and Figure 3 ,

[0047] A delamination device for automatically measuring and controlling the interface of carbon fiber solvent includes a delamination device 1, a shunt regulating balancer 2 and a DCS control system 16. The delamination device 1 is provided with a stratification interface control unit 15, and the stratification interface control unit 15 is electrically connected to the DCS control system 16. The DCS control system 16 detects the position height of the stratification interface in the delamination device 1, so that the shunt regulating balancer 2 adjusts the stratification interface height to achieve separation of acrylonitrile aqueous solution. The shunt regulating balancer 2 replaces the traditional hose and water storage tank 35, simplifies the process flow of solution separation, reduces the possibility of acrylonitrile leakage, and ensures the life safety of workshop workers. Through intelligent detection and mechanical interlocking control, the adjustment of the stratification interface height is achieved, the labor intensity of workers is reduced, and the quality and efficiency of solvent recovery are improved.

[0048] Specifically,

[0049] The stratifier 1 is provided with a liquid inlet 11, a water outlet 12, a pressure balance hole 13 and an overflow hole 14. The liquid inlet 11 is used to receive the acrylonitrile aqueous solution after heat exchange and condensation from the condenser, the water outlet 12 and the pressure balance hole 13 are respectively connected to the split flow regulating balancer 2, the water outlet 12 flows into the split flow regulating balancer 2 to collect the water in the lower layer of the stratification interface in the stratifier 1, and the overflow hole 14 is used to recover the acrylonitrile in the upper layer of the stratification interface.

[0050] The layering device 1 includes a tank barrel 19 and a tank cover 191 fixed to the tank barrel, an air pressure balance hole 13 is opened on the tank cover 191, a water outlet hole 12 is opened on the peripheral wall of the tank barrel 19 and is located at 1 / 5 of the total height of the tank barrel 19, and an overflow hole 14 is opened at 4 / 5 of the total height of the tank barrel 19.

[0051] The tank 19 is provided with a layered interface control unit 15, which includes a tube 17 and a magnetic flap 18, and the tube 17 includes a first mounting portion 173 and a second mounting portion 174. In order to increase the detection range of the layered interface and avoid misflow during solvent separation, the first mounting portion 173 and the second mounting portion 174 are both welded to the side wall of the tank 19 and are connected to the acrylonitrile mixed liquid in the tank 19. The first mounting portion 173 is installed at a position slightly higher than the height of the first adjustment hole 211 and not higher than the overflow hole 14, and the second mounting portion 174 is installed at a position slightly lower than the third adjustment hole 213 and not lower than the water outlet hole 12.

[0052] A floating magnetic capsule 172 is provided in the tube 17. The floating magnetic capsule 172 is filled with acrylonitrile liquid and helium in a certain proportion. The filling proportion of acrylonitrile liquid is 30% to 70%, so that the overall density of the floating magnetic capsule 172 is between acrylonitrile and water, and the floating magnetic capsule 172 can float between the stratified interfaces of acrylonitrile and water. When the floating magnetic capsule 172 moves up and down, the position of the magnetic pill 171 on the floating magnetic capsule 172 is detected by the magnetic flap 18, and the magnetic flap 18 transmits the data to the DCS control system 16 through magnetic coupling.

[0053] Specifically,

[0054] Reference Figure 2 and Figure 4 The outer wall of the floating magnetic capsule 172 is provided with a plurality of magnetic pills 171, the diameter of the magnetic pills 171 is 0.02mm, the thickness of the floating magnetic capsule 172 is 0.03mm-0.05mm, the floating magnetic capsule 172 is filled with acrylonitrile liquid and helium in a certain proportion, the filling proportion of acrylonitrile liquid is 30%-70%, and the top of the floating magnetic capsule 172 is provided with a liquid injection port 1722 and a magnetic capsule plug 1721 for closing the liquid injection port 1722. The weight of the floating magnetic capsule 172 and the overall density of the floating magnetic capsule 172 can be reduced, and the accuracy of the position detection of the layered interface can be improved.

[0055] The material of the tube 17 is stainless steel, the material of the floating magnetic capsule 172 is polyester fiber, and the material of the magnetic pill 171 is iron. The outer surface of the magnetic pill 171 is plated with polyester fiber to form a corrosion-resistant layer to prevent the magnetic pill 171 from being corroded by the acrylonitrile aqueous solution, causing contamination of the acrylonitrile aqueous solution, thereby improving the recovery quality of solvent purification.

[0056] The diameter of the floating magnetic capsule 172 is d1, the height of the floating magnetic capsule 172 is h1, and the inner diameter of the tube 17 is d2. The relationship between the three is: h1>d2>1.2d1, which reduces the probability of the floating magnetic capsule 172 flipping in the tube 17. The inner diameter of the tube 17 is greater than 1.2 times the diameter of the floating magnetic capsule 172, which reduces the probability of the floating magnetic capsule 172 rubbing against the inner wall of the tube 17 when moving up and down, thereby improving the detection accuracy of the layered interface position.

[0057] The floating magnetic capsule 172 is oval in shape, and the oval floating magnetic capsule 172 has strong impact resistance and structural stability.

[0058] The shunt regulating balancer 2 includes a box body 21, a box cover 25 that closes the box body 21, a piston assembly 22 and a driving member, wherein the driving member is a cylinder 23. The piston assembly 22 is arranged inside the box body 21. The piston assembly 22 includes a piston body 221 and a push rod 222. The piston body 221 is slidably connected to the inner wall of the box body 21. The cylinder 23 drives the push rod 222 to realize the up and down reciprocating sliding of the piston body 221 in the box body 21. The DCS control system 16 controls the stroke of the piston body 221 by controlling the air intake of the cylinder 23.

[0059] Specifically,

[0060] A first positioning hole 211, a second positioning hole 212 and a third positioning hole 213 are sequentially provided on the peripheral wall of the box body 21 along its height direction from high to low. The first positioning hole 211, the second positioning hole 212 and the third positioning hole 213 are all connected to the water outlet hole 12 at the lower end of the stratifier 1. The first positioning hole 211 is arranged at 2 / 3 of the distance from the water outlet hole 12 to the overflow hole 14, the third positioning hole 213 is arranged at 1 / 3 of the distance from the water outlet hole 12 to the overflow hole 14, and the second positioning hole 212 is arranged in the middle of the first positioning hole 211 and the second positioning hole 212.

[0061] A first water inlet hole 2213 and a second water inlet hole 2214 are provided on the piston body 221. The diameters of the first water inlet hole 2213, the second water inlet hole 2214, the first positioning hole 211, the second positioning hole 212 and the third positioning hole 213 are all d. The height difference between the first water inlet hole 2213 and the second water inlet hole 2214 is H1, the height difference between the first positioning hole 211 and the second positioning hole 212 is H2, and H1-H2>d. When the first water inlet hole 2213 in the piston body 221 is connected with the first positioning hole 211, the second water inlet hole 2214 is prevented from being connected with the second positioning hole 212, thereby realizing mechanical interlocking.

[0062] When the stratification interface position of the acrylonitrile aqueous solution is higher than the set fluctuation floating value interval, the piston body 221 moves upward until the bottom surface of the piston body 221 is higher than the third adjustment hole 213, and the lower layer of water quickly enters the diversion regulating balancer 2 to reduce the stratification interface height. When the stratification interface height reaches the set fluctuation floating value interval, the piston body 221 moves downward to the second water outlet hole 12 and connects with the second adjustment hole 212. Conversely, when the stratification interface position of the acrylonitrile aqueous solution is lower than the fluctuation floating value interval, the piston body 221 moves downward to the first water inlet hole 2213 of the piston body 221 and connects with the first adjustment hole 211. The acrylonitrile aqueous solution in the layerer 1 begins to be stored. When the stratification interface height reaches the set fluctuation floating value interval, the piston body 221 moves upward to the second water outlet hole 12 and connects with the second adjustment hole 212.

[0063] In order to reduce the weight of the piston body 221 and save processing costs, the cross-section of the piston body 221 along its movement direction is H-shaped. The piston body 221 is a welded part, consisting of a ring body 2212 and a support plate 2211. The support plate 2211 is welded to the middle of the ring body 2212. The support plate 2211 divides the box body 21 into an upper cavity 214 and a lower cavity 215. In order to balance the air pressure in the upper cavity 214 and the lower cavity 215, a number of pressure relief holes 22111 are opened on the support plate 2211.

[0064] The box cover 25 is also provided with an air hole 24 for communicating with the air pressure balance hole 13 of the stratifier 1 .

[0065] The working principle of the layering device for automatically measuring and controlling the interface position of carbon fiber solvent is as follows: the position of the floating magnetic capsule 172 floating on the layering interface in the layering device 1 is detected by the layering interface control unit 15, and the position of the layering interface is indirectly detected, and the air intake of the cylinder 23 is controlled according to the position of the layering interface. The cylinder 23 drives the piston body 221 to move up and down in the box body 21 through the push rod 222, so as to control the height of the connection position between the water outlet 12 and the diversion regulating balancer 2.

[0066] The present invention discloses a method for automatically measuring and controlling the interface of carbon fiber solvent, which is divided into three steps:

[0067] In the first step, the acrylonitrile aqueous solution flows into the stratifier 1 along the liquid inlet 11 and is statically stratified. According to the density difference between acrylonitrile and water, the acrylonitrile with a small density is located at the upper layer of the stratification interface, and the water with a large density is located at the lower layer of the stratification interface;

[0068] In the second step, the floating magnetic capsule 172 floats on the layered interface in the tube 17, and the layered interface control unit 15 obtains the position of the layered interface by detecting the position of the floating magnetic capsule 172, and outputs the position data to the DCS control system 16 to monitor the position of the layered interface. The DCS control system 16 controls the air intake of the cylinder 23 according to the position of the layered interface, and then controls the up and down movement of the piston body 221 to control the position of the layered interface in the layerer 1;

[0069] The third step, when the moving position of the floating magnetic capsule 172 is within the fluctuation floating value interval, the second adjustment hole 212 is connected to the second water inlet hole 2214, and the first adjustment hole 211 and the second adjustment hole 212 are not connected to the inner cavity of the box body 21, and the fluctuation floating value interval is the 1 / 3 section between the water outlet hole 12 and the overflow hole 14, the water outlet hole 12 is located at 1 / 5 of the total height of the tank barrel 191, the overflow hole 14 is located at 4 / 5 of the total height of the tank barrel 191, and the fluctuation floating value interval is located at 2 / 5 to 3 / 5 of the total height of the tank barrel 191; when the floating When the moving position of the magnetic capsule 172 is higher than the upper limit of the fluctuation floating value interval, the piston body 221 moves upward until the third adjustment hole 213 is directly connected to the inner cavity of the box body 21. At this time, the first adjustment hole 211 and the second adjustment hole 212 are not connected to the inner cavity of the box body 21; when the moving position of the floating magnetic capsule 172 is lower than the lower limit of the fluctuation floating value interval, the piston body 221 moves downward until the first adjustment hole 211 is connected to the first water inlet hole 2213. At this time, the second adjustment hole 212 and the third adjustment hole 213 are not connected to the inner cavity of the box body 21.

[0070] Finally, it should be pointed out that the above embodiments are only representative examples of the present invention. Obviously, the present invention is not limited to the above embodiments, and there are many variations. Any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention should be considered to belong to the protection scope of the present invention.

Claims

1. A delamination device for automatically measuring and controlling the interface of carbon fiber solvent, characterized in that: The invention comprises a stratifier (1), a flow-dividing regulating balancer (2) connected to the stratifier (1), wherein the stratifier (1) is provided with a liquid inlet (11) for an acrylonitrile aqueous solution, a water outlet (12) connected to the flow-dividing regulating balancer (2), an air pressure balancing hole (13), and an overflow hole (14) for diverting acrylonitrile. The flow-dividing regulating balancer (2) comprises a housing (21), a piston assembly (22) slidably connected to the housing (21), and a driving member for driving the piston assembly (22) to reciprocate up and down. A first positioning hole (211), a second positioning hole (212), and a third positioning hole (213) are sequentially provided on a peripheral wall of the housing (21) from high to low along its height direction. The first positioning hole (211), the second positioning hole (212), and the third positioning hole (213) are all connected to the water outlet (12). The piston assembly (22) comprises a piston body (221), wherein the piston body (221) divides the housing (21) into an upper cavity (214) and a lower cavity (215), and the piston body (221) is provided with a plurality of pressure relief holes (22111) communicating with the upper cavity (214) and the lower cavity (215), and the piston body (221) is provided with a first water inlet hole (2213) communicating with the first position adjustment hole (211) and the inner cavity of the housing (21), and the piston body (221) is also provided with a second water inlet hole (2214) communicating with the second position adjustment hole (212) and the inner cavity of the housing (21), and the height difference between the first water inlet hole (2213) and the second water inlet hole (2214) is H1, and the height difference between the first position adjustment hole (211) and the second position adjustment hole (212) is H2, and H1>H2. The delamination device (1) is provided with a delamination interface control unit (15) for detecting the height of the delamination interface. The delamination interface control unit (15) comprises a tube (17) externally arranged on the side wall of the delamination device (1) and a magnetic flap (18) fixed on the tube (17). Both ends of the tube (17) are installed in a direction parallel to the axis of the delamination device (1) and are connected to the inner cavity of the delamination device (1). A floating magnetic capsule (172) is provided in the tube (17). The overall density ρ of the floating magnetic capsule (172) ranges from 900 kg / m 3 <ρ<1000kg / m 3 The magnetic flap (18) is electrically connected to a DCS control system (16), and the DCS control system (16) is used to obtain the position height of the floating magnetic capsule (172) and control the movement stroke of the driving member driving the slider.

2. A delamination device for automatically measuring and controlling the interface of carbon fiber solvent according to claim 1, characterized in that: The piston assembly (22) further comprises a push rod (222) for pushing the piston body (221) to move back and forth; the cross-section of the piston body (221) along its moving direction is H-shaped; the push rod (222) is fixed to one side of the piston body (221) close to the top of the box body (21); and the driving member is a cylinder (23).

3. A delamination device for automatically measuring and controlling the interface of carbon fiber solvent according to claim 2, characterized in that: The piston body (221) comprises a ring body (2212) and a support plate (2211) fixed to the ring body (2212); the pressure relief hole (22111) is provided on the support plate (2211); the first water inlet hole (2213) and the second water inlet hole (2214) are provided on the peripheral wall of the ring body (2212); and the push rod (222) is fixed to the support plate (2211).

4. A delamination device for automatically measuring and controlling the interface of carbon fiber solvent according to claim 2 or 3, characterized in that: The outer wall of the floating magnetic capsule (172) is provided with a magnetic pill (171). When the floating magnetic capsule (172) moves up and down, the data transmitted by the magnetic flap (18) through magnetic coupling is transmitted to the DCS control system (16) in the form of electrical signals.

5. A delamination device for automatically measuring and controlling the interface of carbon fiber solvent according to claim 4, characterized in that: The material of the tube (17) is stainless steel, the material of the floating magnetic capsule (172) is polyester fiber, the material of the magnetic ball (171) is iron, and the outer surface of the magnetic ball (171) is electroplated with polyester fiber to form a corrosion-resistant layer.

6. The delamination device for automatically measuring and controlling the interface of carbon fiber solvent according to claim 5, characterized in that: The diameter of the floating magnetic capsule (172) is d1, the height of the floating magnetic capsule (172) is h1, and the inner diameter of the tube (17) is d2. The relationship between the three is: h1>d2>1.2d1.

7. A delamination device for automatically measuring and controlling the interface of carbon fiber solvent according to claim 5 or 6, characterized in that: The floating magnetic capsule (172) has a thickness of 0.03 mm to 0.05 mm.

8. The delamination device for automatically measuring and controlling the carbon fiber solvent interface according to claim 6, characterized in that: The floating magnetic capsule (172) is oval in shape.

9. The delamination device for automatically measuring and controlling the carbon fiber solvent interface according to claim 8, characterized in that: The floating magnetic capsule (172) is filled with acrylonitrile, and the liquid injection port (1722) of the floating magnetic capsule (172) is opened at the top of the floating magnetic capsule (172).

10. A method for automatically measuring and controlling the carbon fiber solvent interface, the steps are as follows: S1. The mixed solvent flows into the stratifier (1) along the liquid inlet hole (11) and is allowed to stand for stratification; S2. The layered interface control unit (15) detects the position of the floating magnetic capsule (172) and outputs it to the DCS control system (16) to monitor the position of the layered interface, and controls the air intake of the cylinder (23) according to the position of the layered interface, and controls the layered interface by moving the piston body (221) up and down; S3. When the moving position of the floating magnetic capsule (172) is within the fluctuation floating value interval, the second position adjustment hole (212) is connected to the second water outlet hole (12), the first position adjustment hole (211) and the second position adjustment hole (212) are not connected to the inner cavity of the box body (21), and the fluctuation floating value interval is 1 / 3 of the distance between the water outlet hole (12) and the overflow hole (14); when the moving position of the floating magnetic capsule (172) is higher than the upper limit of the fluctuation floating value interval, the piston body (221) moves upward, and the The third position adjustment hole (213) is directly connected to the inner cavity of the box body (21), and the first position adjustment hole (211) and the second position adjustment hole (212) are not connected to the inner cavity of the box body (21); when the moving position of the floating magnetic capsule (172) is lower than the lower limit of the fluctuation floating value range, the piston body (221) moves downward, the first position adjustment hole (211) is connected to the first water inlet hole (2213), and the second position adjustment hole (212) and the third position adjustment hole (213) are not connected to the inner cavity of the box body (21).

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