A carbon fiber delamination recovery device and method for intelligent liquid level measurement and control

Abstract

This application relates to the technical field of carbon fiber chemical equipment, and more particularly to a carbon fiber delamination recovery device with intelligent liquid level measurement and control. The device includes a delamination device and a diverter and flow regulator connected to the delamination device. The delamination device is provided with a delamination interface control unit for detecting the height of the delamination interface. The delamination interface control unit is electrically connected to a DCS control system and indirectly adjusts the delamination interface height of the acrylonitrile aqueous solution in the delamination device within a certain range via the diverter and flow regulator. This device replaces the traditional hose structure and water phase receiving tank, simplifying the solvent separation process, reducing the risk of acrylonitrile leakage, and ensuring worker safety. Through intelligent detection and electrical interlocking control, the delamination interface is precisely controlled, reducing worker labor intensity, and improving the quality and efficiency of solvent recovery.

Description

Technical Field

[0001] The present invention belongs to the technical field of carbon fiber chemical equipment, and in particular relates to a carbon fiber delamination recovery device and method for intelligently measuring and controlling liquid levels. 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 de-aeration and concentration process and the washing process, and the dimethyl sulfoxide aqueous solution produced by the spinning device in the coagulation bath process and water washing process 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-point removal system, and a solvent storage system. Among them, the acrylonitrile removal system mainly consists 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, condensed into liquid form by heat exchange in the condenser, and enter the separator. Due 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. The acrylonitrile in the upper layer of the separator and the water in the lower layer flow into their respective storage containers.

[0004] Since both acrylonitrile and water in the separator flow into respective storage containers through 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 separator 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. The three-way pipe joint 36 is provided with a third hose 32, a water phase receiving 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, and the second hose 31 is connected to the right-angle end of the three-way pipe joint 36. The height of the first hose 30 is consistent with that of the third hose 32.

[0006] A mixture of acrylonitrile and water flows into the stratifier 1 through the liquid inlet 11. The acrylonitrile and water are allowed to stand and separate in the stratifier 1. The upper layer, acrylonitrile liquid, flows into the acrylonitrile storage tank through the overflow hole 14. The lower layer, water, flows into the first hose 30 and the third hose 32 through the water outlet 12. 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 requires ensuring that sufficient adjustment margins are reserved for the first hose 30, the second hose 31 and the third hose 32. In workshop production, it not only takes up a large space, but the hoses are also consumable parts and need to be regularly inspected and replaced. Acrylonitrile is a flammable liquid. Once a leak occurs, its vapor and air can form an explosive mixture and release toxic gases, directly affecting the life safety of workshop workers. In addition, manually adjusting the height of the stratification interface not only increases the labor intensity of the operator, but also has low efficiency. In particular, when the stratification interface is not controlled in time, it is very easy to cause the stratification interface to fluctuate beyond the safe range, thereby causing serious consequences such as solution overflow and uneven mixing, posing a severe challenge to the recovery safety and quality of the solution. Its potential risks cannot be ignored.

[0008] Therefore, in order to solve the above technical problems, exploring and breaking through the existing layered 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 delamination 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 safety of workshop workers.

[0010] This application provides a carbon fiber delamination recovery device and method for intelligent liquid level measurement and control, which adopts the following technical solutions:

[0011] A carbon fiber delamination recovery device with intelligent liquid level measurement and control, comprising a delamination device, a diversion regulating balancer connected to the delamination device, the delamination device being provided with a liquid inlet for an acrylonitrile aqueous solution, a water outlet connected to the diversion regulating balancer, an air pressure balancing hole, and an overflow hole for diverting acrylonitrile, the diversion regulating balancer being provided with a first adjusting hole connected to the water outlet, a third adjusting hole located below the first adjusting hole, and a second adjusting hole between the first adjusting hole and the third adjusting hole, the first adjusting hole being lower than the height of the overflow hole, the third adjusting hole being higher than the height of the water outlet, a first valve body for opening and closing the first adjusting hole, a second valve body for opening and closing the second adjusting hole, and a third valve body for opening and closing the second adjusting hole being provided on the water outlet, the delamination device being provided with a delamination interface control unit for detecting the height of a delamination interface, the delamination interface control unit being electrically connected to a DCS control system, the DCS control system being used to control the opening and closing of the first valve body, the second valve body, and the third valve body.

[0012] By adopting the above technical solution, after the layered interface control unit detects the height of the layered interface position, the signal is transmitted to the DCS control system. The DCS control system controls the connection status of the first valve body, the second valve body and the third valve body with the water outlet according to the position of the layered interface. The first adjustment hole on the diverter adjustment balancer is lower than the overflow hole height, which can reduce the probability of acrylonitrile accidentally entering the diverter adjustment balancer. The height of the third adjustment hole is higher than the position height of the water outlet hole, so that the acrylonitrile aqueous solution maintains a certain amount of water in the stratifier, reduces the fluctuation frequency of the solution in the stratifier, and shortens the static stratification time of the acrylonitrile aqueous solution; when the stratification interface position of the acrylonitrile aqueous solution is higher than the upper limit of the set fluctuation floating value range, the third valve body opens, and the lower layer of water quickly enters the diverter adjustment balancer to lower the stratification interface height. When the stratification interface reaches the set fluctuation floating value range, the third valve body is closed and the second valve body is opened. Conversely, when the stratification interface position of the acrylonitrile aqueous solution is lower than the lower limit of the set fluctuation floating value range, the first valve body is opened, and the acrylonitrile aqueous solution in the stratifier begins to be stored until the stratification interface rises to the set fluctuation floating value range, then the first valve body is closed and the second valve body is connected for operation. Through intelligent detection and electrical interlocking control, the height of the stratification interface can be adjusted, reducing the labor intensity of workers and improving the quality and efficiency of solvent recovery; the diversion adjustment balancer replaces the traditional hose and water phase receiving tank, simplifying the solution separation process, reducing the possibility of acrylonitrile leakage, and ensuring the safety of workshop workers.

[0013] Optionally, the stratification interface control unit includes a tube externally arranged on the side wall of the destratifier and a magnetic flap fixed on the tube. Both ends of the tube are installed in a direction parallel to the axis of the destratifier and are connected to the inner cavity of the destratifier. A floating magnetic capsule is provided in the tube, a magnetic pill is provided on the outer wall of the floating magnetic capsule, and the floating magnetic capsule is filled with acrylonitrile liquid.

[0014] By adopting the above technical solution, the external tube is connected to the acrylonitrile aqueous solution of the internal destratifier, and the height of the destratification interface in the external tube is consistent with that of the destratifier. Since the overall density of the floating magnetic capsule is between that of acrylonitrile and water, the floating magnetic capsule can float between the destratification 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 destratification interface. The floating magnetic capsule is filled with acrylonitrile liquid and helium. Even if it leaks, it will not cause pollution to the acrylonitrile aqueous solution in the destratifier.

[0015] Optionally, the layered interface control unit includes a sleeve arranged in the chamber of the delaminator and a float inserted through the sleeve, wherein the axis of the sleeve is parallel to the axis of the delaminator, the float is slidably connected to the sleeve, and the density ρ of the float is in the range of 900 kg / m 3 <ρ<1000kg / m 3 , the bushing is electrically connected to the DCS control system.

[0016] By adopting the above technical solution, the density of the floating block is between that of acrylonitrile and water, so that the floating block is stable in the vicinity of the stratified interface; the floating block is slidably connected to the casing to prevent the floating block from flipping and moving left and right, making it easier to detect the position of the floating block, reducing the error in the floating block position detection, and improving the accuracy of the stratified interface position detection.

[0017] Optionally, the floating block includes a bag cover and a magnetic ring bonded to the bag cover, and the sleeve includes a magnetic conductive tube and a corrosion-resistant layer provided on the surface of the magnetic conductive tube.

[0018] By adopting the above technical solution, the position height of the float is detected through the action of the magnetic ring and the magnetic tube, which is electrically connected to the DCS control system through the magnetic tube. The surface of the magnetic tube is provided with a corrosion-resistant layer to prevent the magnetic tube from chemically reacting in the acrylonitrile aqueous solution, thereby improving the detection accuracy of the stratified interface position.

[0019] Optionally, the stratifier includes a tank barrel and a tank cover fixed on the tank barrel, the air pressure balance hole is opened on the tank cover, the water outlet hole is opened on the peripheral wall of the tank barrel and is located at 1 / 5 of the total height of the tank barrel side wall, and the overflow hole is opened at 4 / 5 of the total height of the tank barrel side wall.

[0020] By adopting the above technical solution, the water outlet is located at 1 / 5 of the total height of the barrel, reducing the probability of accidental outflow of acrylonitrile liquid due to the water outlet being located too low. The overflow hole is located at 4 / 5 of the total height of the barrel, reducing the probability of lower layer water overflowing into the acrylonitrile recovery tank due to the overflow hole being located too low. By controlling the heights of the water outlet and overflow holes, the recovery quality of acrylonitrile solvent and water is improved.

[0021] Optionally, the sac includes several liquid sacs, and two adjacent liquid sacs are detachably connected and connected on the same plane. The liquid sac is provided with an injection nozzle and a plug for closing the injection nozzle. The floating sleeve is filled with 30% to 70% acrylonitrile liquid, the magnetic ring is bonded to the inner side of the liquid sac, the liquid sac material is polyester fiber, and the liquid sac thickness is 0.1 to 0.2 mm.

[0022] By adopting the above technical solution, several liquid capsules are assembled into a capsule sleeve, which reduces the risk of leakage of a single liquid capsule and causing erroneous position detection, and improves the accuracy of layered interface detection.

[0023] Optionally, a convex column is provided on one side of the liquid sac, and a column cap is provided on a side away from the convex column, the column cap is threadedly connected to the convex column, and a connecting soft belt is provided on the column cap, and the connecting soft belt is rotatably connected to the column cap.

[0024] By adopting the above technical solution, the liquid capsules are connected through a detachable structure, which is convenient for replacing the liquid capsules in case of leakage. At the same time, multiple liquid capsules work together, and leakage or failure of one liquid capsule will not affect the position measurement results of the layered interface; the connecting soft belt is connected to the column cap, which is convenient for connecting adjacent liquid capsules. The connecting soft belt is rotatably connected to the column cap to avoid twisting of the connecting soft belt when the column cap is screwed on the boss, thereby reducing the possibility of loosening of the liquid capsule connection.

[0025] Optionally, the cross-section of the liquid sac along the axial direction of the sleeve is rhombus-shaped.

[0026] By adopting the above technical solution, the cross-section of the liquid sac is diamond-shaped, which improves the stability of the liquid in the liquid sac.

[0027] Optionally, the end of the sleeve close to the acrylonitrile is detachably mounted on the layerer, and the mounting height is higher than the overflow hole height, the insertion position of the other end of the sleeve is lower than the height of the water outlet hole, and a block is provided at the bottom of the sleeve to prevent the float from detaching from the sleeve.

[0028] By adopting the above technical solution, if the insertion position of the other end of the casing is higher than the height of the water outlet, when the stratified interface drops to the water outlet, it cannot be detected in time, which may easily cause acrylonitrile to mistakenly enter the diversion adjustment balancer. The block is used to prevent the float from detaching from the casing, avoiding interruption of the casing signal transmission.

[0029] A recovery method for a stratifier with intelligent liquid level measurement and control, S1. A mixed solvent flows into the stratifier along the liquid inlet hole for static stratification; S2. The stratification interface control unit detects the position of the float and outputs it to the DCS control system to monitor the position of the stratification interface; S3. When the moving position of the float is in the fluctuation float value interval, the second valve body is connected, and the first valve body and the third valve body are disconnected, and the fluctuation float value interval is 1 / 3 of the distance between the water outlet and the overflow hole; when the position of the float is higher than the upper limit of the fluctuation float value interval, the third valve body is connected, and the first valve body and the second valve body are disconnected; when the position of the float is lower than the lower limit of the fluctuation float value interval, the first valve body is connected, and the second valve body and the third valve body are disconnected, and the size of the fluctuation float value is detected by the DCS control system to realize the control of the on and off of the first valve body, the second valve body and the third valve body.

[0030] By adopting the above technical solution, the optimal position interval of the float is set to 1 / 3 of the distance between the overflow hole 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 fluctuation floating value interval is located at 2 / 5 to 3 / 5 of the total height of the tank). Through intelligent detection and electric interlocking control, real-time monitoring and adjustment are carried out to accurately control the stratification interface. Once the position change of the stratification interface is detected, the DCS control system will quickly adjust the stratification interface to the optimal position interval according to the fluctuation floating value interval of the float, 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 stratification interface and improving the quality and efficiency of solvent recovery.

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

[0032] 1. Through intelligent detection and electric interlocking control, real-time monitoring and adjustment, precise control of the layering interface, reducing workers' labor intensity, and improving the quality and efficiency of solvent recovery;

[0033] 2. The split flow regulating balancer replaces the traditional hose structure and water phase receiving tank, simplifying the solvent separation process, reducing the risk of acrylonitrile leakage, and ensuring worker safety;

[0034] 3. The height of the third adjustment hole on the diversion adjustment balancer is higher than the height of the water outlet hole, so that the acrylonitrile aqueous solution maintains a certain amount of water in the stratifier, reduces the fluctuation amplitude of the solution in the stratifier, shortens the static stratification time of the acrylonitrile aqueous solution, and improves the solvent recovery quality;

[0035] 4. Several sacs are assembled into a sac sleeve to reduce the risk of incorrect position detection caused by leakage of a single sac and improve the accuracy of layered interface detection;

[0036] 5. The detection of the stratified interface control unit can be achieved by detecting the stratified interface through the built-in magnetic tube to detect the magnetic ring on the float block, or by detecting the position of the magnetic ball on the floating magnetic bag through the external magnetic flap. Since the density of the bag is greater than the density of acrylonitrile, the float block and the floating magnetic bag are filled with a certain proportion of acrylonitrile liquid and helium, so that the density of the float block and the floating magnetic bag is between the density of acrylonitrile water. At the same time, the acrylonitrile liquid and helium filled in the bag will not cause pollution to the acrylonitrile aqueous solution in the stratifier even if it leaks.

[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 This is a schematic diagram of the layered interface adjustment structure of a traditional layerer;

[0039] Figure 2 1 is a schematic structural diagram of the delamination device recovery device of Example 1;

[0040] Figure 3 is a schematic structural diagram of the layered interface control unit in Example 1;

[0041] Figure 4 is a schematic structural diagram of the floating block in Example 1;

[0042] Figure 5 is a schematic structural diagram of the liquid capsule in Example 1;

[0043] Figure 6 yes Figure 5 AA cross-sectional view;

[0044] Figure 7 This is a schematic structural diagram of a delamination recovery device according to Example 2;

[0045] Figure 8 is a schematic structural diagram of the floating magnetic capsule in Example 2;

[0046] Figure 9 yes Figure 8 BB cross-sectional view.

[0047] In the figure: 1, stratifier; 11, liquid inlet; 12, water outlet; 13, air pressure balance hole; 14, overflow hole; 15, layered interface control unit; 151, casing; 1511, magnetic tube; 1512, corrosion-resistant layer; 1513, stopper; 152, float; 1521, bag cover; 15211, liquid bag; 15212, injection nozzle; 15213, plug; 15214, boss; 15215, column cap; 15216, connecting soft belt; 1522, magnetic ring; 16, DCS control system; 17, tube; 171, magnetic pill; 172, float Magnetic capsule; 1721, magnetic capsule plug; 1722, liquid injection hole; 173, first mounting part; 174, second mounting part; 18, magnetic flap; 19, flange; 191, tank barrel; 192, tank cover; 2, diverter adjustment balancer; 21, first adjustment hole; 22, second adjustment hole; 23, third adjustment hole; 24, first valve body; 25, second valve body; 26, third valve body; 27, air hole; 30, first hose; 31, second hose; 32, third hose; 33, first conduit; 34, second conduit; 35, water phase receiving tank; 36, three-way pipe joint. DETAILED DESCRIPTION

[0048] The following is combined with Figure 2-9 This application is described in further detail.

[0049] Example 1 of the present application discloses a stratifier recovery device and method for intelligently measuring and controlling liquid level.

[0050] Reference Figure 2 and Figure 3 ,

[0051] A stratifier recovery device with intelligent liquid level measurement and control includes a stratifier 1, a diverter adjustment balancer 2, and a DCS control system 16. The stratifier 1 is provided with a stratification interface control unit 15, which is electrically connected to the DCS control system 16. The DCS control system 16 detects the position height of the stratification interface in the stratifier 1 through the stratification interface control unit 15, and causes the diverter adjustment balancer 2 to adjust the stratification interface height to achieve separation of acrylonitrile and aqueous solution. The diverter adjustment balancer 2 replaces the traditional hose and water phase receiving tank 35, simplifying the solution separation process, reducing the possibility of acrylonitrile leakage, and ensuring the safety of workshop workers. Through intelligent detection and electrical connection control, the stratification interface height can be adjusted, eliminating the labor intensity of workers and improving the quality and efficiency of solvent recovery.

[0052] Specifically,

[0053] 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 condensed by heat exchange from the condenser. The water outlet 12 and the pressure balance hole 13 are respectively connected to the diverter and regulator balancer 2. The water outlet 12 flows into the diverter and regulator balancer 2 to collect water below the stratification interface in the stratifier 1. The overflow hole 14 is used to recover the acrylonitrile above the stratification interface.

[0054] The stratifier 1 includes a tank barrel 191 and a tank cover 192 fixed to the tank barrel 191. The air pressure balance hole 13 is opened on the tank cover 192. The water outlet hole 12 is opened on the peripheral wall of the tank barrel 191 and is located at 1 / 5 of the total height of the tank barrel 191. The overflow hole 14 is opened at 4 / 5 of the total height of the tank barrel 191.

[0055] The diverter and regulator balancer 2 is provided with a first adjustment hole 21, a second adjustment hole 22, a third adjustment hole 23, and an air hole 27. The air hole 27 is opened at the top of the diverter and regulator balancer 2 and communicates with the air pressure balance hole 13. The first adjustment hole 21, the second adjustment hole 22, and the third adjustment hole 23 are arranged in descending order according to the height of the diverter and regulator balancer 2. The first adjustment hole 21 is located at 2 / 3 of the distance between the water outlet 12 and the overflow hole 14. The third adjustment hole 23 is located at 1 / 3 of the distance between the water outlet 12 and the overflow hole 14. The second adjustment hole 22 is located between the first adjustment hole 21 and the third adjustment hole 23.

[0056] A first valve body 24 is provided between the water outlet 12 and the first adjustment hole 21 , a second valve body 25 is provided between the water outlet 12 and the second adjustment hole 22 , and a third valve body 26 is provided between the water outlet 12 and the third adjustment hole 23 . The valve bodies are stop valves.

[0057] The tank cover 192 is provided with a layered interface control unit 15, which includes a sleeve 151 and a float 152. The density ρ of the float 152 is in the range of 900 kg / m 3 <ρ<1000kg / m 3 Float 152 is capable of floating at the interface between acrylonitrile and water. A flange 19 is provided on the tank lid 192. One end of a sleeve 151 is fixed to flange 19, with the axis of the sleeve 151 parallel to the axis of the tank body. Float 152 is positioned outside the sleeve 151 to prevent it from flipping or moving left or right. This facilitates detection of the position of float 152, reduces errors in position detection, and improves the accuracy of detection of the interface. The other end of the sleeve 151 is inserted below the height of the water outlet 12. If the sleeve 151 is inserted above the height of the water outlet 12, when the interface drops to the water outlet 12, it cannot be detected in time, which can easily cause acrylonitrile to accidentally enter the diverter and regulator 2. To prevent float 152 from escaping from the sleeve 151, a stopper 1513 is provided at the bottom of the sleeve 151.

[0058] Specifically,

[0059] Reference Figure 4 and Figure 5 ,

[0060] The float 152 includes a bag cover 1521 and a magnetic ring 1522. The magnetic ring 1522 is bonded to the inner wall of the bag cover 1521. The sleeve 151 includes a magnetic tube 1511 and a corrosion-resistant layer 1512. The material of the bag cover 1521 is polyester fiber. The bag cover 1521 is filled with acrylonitrile liquid and helium in a certain proportion. The filling ratio of acrylonitrile liquid is 30% to 70%. The bag cover 1521 is filled with acrylonitrile liquid and helium, which can prevent the acrylonitrile liquid and helium from contaminating the acrylonitrile aqueous solution in the barrel 191 even if they leak. The thickness of the bag cover 1521 is 0.1 to 0.2 mm. The material of the magnetic tube 1511 is iron. The corrosion-resistant layer 1512 is a polyester fiber protective layer electroplated on the magnetic tube 1511, which protects the surface of the magnetic tube 1511 from corrosion and protects the purity of the solvent separation. The position height of the float 152 is detected by the action of the magnetic ring 1522 and the magnetic tube 1511 , and is electrically connected to the DCS control system 16 through the magnetic tube 1511 , thereby realizing the detection of the position of the float 152 .

[0061] In order to reduce the possibility of leakage of the capsule 1521 during operation, the capsule 1521 includes four liquid capsules 15211. Two adjacent liquid capsules 15211 are connected on the same plane in a detachable manner, which facilitates the replacement of the leaking liquid capsule 15211. If one liquid capsule 15211 leaks or fails, it will not affect the position measurement result of the layered interface, thereby improving the accuracy of the layered interface detection.

[0062] The liquid capsule 15211 is provided with a liquid injection nozzle 15212 and a plug 15213 , and the plug 15213 is used to close the liquid injection nozzle 15212 to prevent acrylonitrile from flowing out and affecting the detection accuracy of the layered interface.

[0063] Reference Figure 4 and Figure 6 ,

[0064] A protruding column 15214 is provided on one side of the liquid capsule 15211, and a column cap 15215 is provided on the side away from the protruding column 15214. The column cap 15215 is threadedly connected to the protruding column 15214. A connecting soft belt 15216 is provided on the column cap 15215. The connecting soft belt 15216 is rotatably connected to the column cap 15215. The column cap 15215 of the liquid capsule 15211 is connected to the protruding column 15214 of the adjacent liquid capsule 15211 to realize the splicing of four liquid capsules 15211. The connecting soft belt 15216 is connected to the column cap 15215 to facilitate the connection of adjacent liquid capsules 15211. The connecting soft belt 15216 is rotatably connected to the column cap 15215 to prevent the connecting soft belt 15216 from twisting when the column cap 15215 is screwed on the protruding column 15214, thereby reducing the possibility of the liquid capsule 15211 being loosened. In order to improve the stability of the liquid in the liquid capsule 15211, the cross-section of the liquid capsule 15211 is diamond-shaped.

[0065] The working principle of the stratifier recovery device for intelligent liquid level measurement and control of the present application is as follows: the position of the floating block 152 floating on the stratification interface in the stratifier 1 is detected by the stratification interface control unit 15, and the position of the stratification interface is indirectly detected. The on and off of the first valve body 24, the second valve body 25 and the third valve body 26 are controlled according to the position of the stratification interface, and the position height of the water outlet 12 and the stratification adjustment balancer 2 is controlled.

[0066] The recovery method of the intelligent liquid level measuring and controlling stratifier of the present application 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 allowed to stand for stratification;

[0068] In the second step, the layered interface control unit 15 detects the position of the magnetic ring 1522 on the float 152 through the magnetic tube 1511 and outputs it to the DCS control system 16 to monitor the position of the layered interface;

[0069] In the third step, when the moving position of the float 152 is within the fluctuation float range, the second valve body 25 is connected, the first valve body 24 and the third valve body 26 are disconnected, and the fluctuation float range is 1 / 3 of the distance between the water outlet 12 and the overflow hole 14 (the water outlet 12 is located at 1 / 5 of the total height of the barrel 191, the overflow hole 14 is located at 4 / 5 of the total height of the barrel 191, and the fluctuation float range is located at 2 / 5 to 3 / 5 of the total height of the barrel 191); when the position of the float 152 is higher than the fluctuation float range When the upper limit of the interval is reached, the third valve body 26 is connected to the water outlet 12, the first valve body 24 and the second valve body 25 are disconnected, and the lower layer of water in the stratifier 1 flows into the diversion regulating balancer 2; when the position of the float 152 is lower than the lower limit of the fluctuation float value interval, the second valve body 25 and the third valve body 26 are disconnected, the first valve body 24 is connected to the water outlet 12, and the stratifier 1 begins to store acrylonitrile aqueous solution, and the on-off control of the first valve body 24, the second valve body 25 and the third valve body 26 is realized by the size of the fluctuation float value.

[0070] Example 2 of the present application discloses a stratifier recovery device and method for intelligently measuring and controlling liquid level.

[0071] The difference from Example 1 is that

[0072] Reference Figure 7 and Figure 8 ,

[0073] The stratified interface control unit 15 includes a tube 17 and a magnetic flap 18. Tube 17 includes a first mounting portion 173 and a second mounting portion 174. To increase the detection range of the stratified interface and prevent erroneous flow during solvent separation, both the first mounting portion 173 and the second mounting portion 174 are welded to the sidewall of the tank 191 and communicate with the acrylonitrile mixture within the tank 191. The first mounting portion 173 is installed slightly above the first adjustment hole 21 and below the overflow hole 14. The second mounting portion 174 is installed slightly below the third adjustment hole 23 and above the water outlet 12.

[0074] Reference Figure 7 and Figure 9 ,

[0075] Tube 17 houses a floating magnetic capsule 172, equipped with a liquid injection port 1722 and a magnetic capsule plug 1721. Floating magnetic capsule 172 is filled with acrylonitrile liquid and helium gas in a ratio of 30% to 70%. This ensures that the overall density of Floating Magnetic Capsule 172 is between that of acrylonitrile and water, allowing it to float at the interface between the two. As Floating Magnetic Capsule 172 moves up and down, the position of the magnetic pellet 171 on top of it is detected by a magnetic flap 18, which transmits this data to the DCS control system 16 via magnetic coupling.

[0076] Finally, it should be noted that the above embodiments are merely representative examples of the present invention. Obviously, the present invention is not limited to the above embodiments and is susceptible to numerous variations. Any simple modifications, equivalent variations, and modifications to the above embodiments based on the technical essence of the present invention are deemed to fall within the scope of protection of the present invention.

Claims

1. A method for recycling a carbon fiber delamination device with intelligent liquid level measurement and control, characterized in that: A carbon fiber delamination device recovery device is used, comprising a delamination device (1) and a diversion regulating balancer (2) connected to the delamination device (1), wherein the delamination device (1) is provided with a liquid inlet (11) for an acrylonitrile aqueous solution, a water outlet (12) communicating with the diversion regulating balancer (2), an air pressure balancing hole (13), and an overflow hole (14) for diverting acrylonitrile; The flow-dividing regulating balancer (2) is provided with a first adjusting hole (21) connected to the water outlet hole (12), a third adjusting hole (23) located below the first adjusting hole (21), and a second adjusting hole (22) between the heights of the first adjusting hole (21) and the third adjusting hole (23), wherein the first adjusting hole (21) is lower than the height of the overflow hole (14), and the third adjusting hole (23) is higher than the height of the water outlet hole (12); The water outlet (12) is provided with a first valve body (24) for opening and closing the first position adjustment hole (21), a second valve body (25) for opening and closing the second position adjustment hole (22), and a third valve body (26) for opening and closing the third position adjustment hole (23); The stratifier (1) is provided with a stratification interface control unit (15) for detecting the height of the stratification interface. The stratification interface control unit (15) is electrically connected to a DCS control system (16). The DCS control system (16) is used to control the on / off of the first valve body (24), the second valve body (25) and the third valve body (26). The stratification interface control unit (15) includes a sleeve (151) provided in the chamber of the stratifier (1) and a floating block (152) passing through the sleeve (151). The axis of the sleeve (151) is parallel to the axis of the stratifier (1). The floating block (152) is slidably connected to the sleeve (151). The recycling method steps are as follows: S1. The mixed solvent flows into the stratifier (1) along the liquid inlet (11) and is allowed to stand for stratification; S2. The layered interface control unit (15) detects the position of the float (152) and outputs it to the DCS control system (16) to monitor the position of the layered interface; S3. When the moving position of the float (152) is in the fluctuation float value interval, the second valve body (25) is connected, and the first valve body (24) and the third valve body (26) are disconnected. The fluctuation float value interval is the 1 / 3 section in the middle of the distance from the water outlet (12) to the overflow hole (14); when the position of the float (152) is higher than the upper limit of the fluctuation float value interval, the third valve body (26) is connected, and the first valve body (24) and the second valve body (25) are disconnected; when the position of the float (152) is lower than the lower limit of the fluctuation float value interval, the first valve body (24) is connected, and the second valve body (25) and the third valve body (26) are disconnected. The DCS control system (16) controls the on and off of the first valve body (24), the second valve body (25) and the third valve body (26) by detecting the size of the fluctuation float value.

2. The recycling method of the carbon fiber delamination device with intelligent liquid level measurement and control according to claim 1 is characterized in that: The layered interface control unit (15) comprises a tube (17) externally arranged on the side wall of the delaminator (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 delaminator (1) and are connected to the inner cavity of the delaminator (1); a floating magnetic capsule (172) is provided in the tube (17); a magnetic pill (171) is provided on the outer wall of the floating magnetic capsule (172); and the floating magnetic capsule (172) is filled with acrylonitrile liquid.

3. The recycling method of the carbon fiber delamination device with intelligent liquid level measurement and control according to claim 1 is characterized in that: The density ρ of the floating block (152) ranges from 900 kg / m 3 <ρ<1 000 kg / m 3 The bushing (151) is electrically connected to the DCS control system (16).

4. The recycling method of the carbon fiber delamination device with intelligent liquid level measurement and control according to claim 3 is characterized in that: The floating block (152) includes a bag cover (1521) and a magnetic ring (1522) bonded to the bag cover (1521); the sleeve (151) includes a magnetic tube (1511) and a corrosion-resistant layer (1512) arranged on the surface of the magnetic tube (1511).

5. The recycling method of the carbon fiber delamination device with intelligent liquid level measurement and control according to claim 2 or 3, characterized in that: The stratifier (1) comprises a tank barrel (191) and a tank cover (192) fixed on the tank barrel (191); the air pressure balance hole (13) is opened on the tank cover (192); the water outlet hole (12) is opened on the peripheral wall of the tank barrel (191) and is located at 1 / 5 of the total height of the side wall of the tank barrel (191); and the overflow hole (14) is opened at 4 / 5 of the total height of the side wall of the tank barrel (191).

6. The method for recycling a carbon fiber delamination device with intelligent liquid level measurement and control according to claim 4, characterized in that: The sac sleeve (1521) includes a plurality of liquid sacs (15211), and two adjacent liquid sacs (15211) are connected detachably and on the same plane. The liquid sac (15211) is provided with a liquid injection nozzle (15212) and a plug (15213) for closing the liquid injection nozzle (15212). The sac sleeve (1521) is filled with 30% to 70% acrylonitrile liquid. The magnetic ring (1522) is bonded to the inner side of the liquid sac (15211). The material of the liquid sac (15211) is polyester fiber, and the thickness of the liquid sac (15211) is 0.1 to 0.2 mm.

7. The recycling method of the carbon fiber delamination device with intelligent liquid level measurement and control according to claim 6, characterized in that: A convex column (15214) is provided on one side of the liquid sac (15211), and a column cap (15215) is provided on the side away from the convex column (15214). The column cap (15215) is threadedly connected to the convex column (15214). A connecting soft belt (15216) is provided on the column cap (15215), and the connecting soft belt (15216) is rotatably connected to the column cap (15215).

8. The method for recycling a carbon fiber delamination device with intelligent liquid level measurement and control according to claim 6 or 7, characterized in that: The cross-section of the liquid sac (15211) along the axial direction of the sleeve (151) is rhombus-shaped.

9. The method for recycling a carbon fiber delamination device with intelligent liquid level measurement and control according to claim 3, characterized in that: One end of the sleeve (151) close to the acrylonitrile is detachably mounted on the separator (1), and the mounting height is higher than the height of the overflow hole (14). The insertion position of the other end of the sleeve (151) is lower than the height of the water outlet hole (12). A stopper (1513) is provided at the bottom of the sleeve (151) for preventing the floating block (152) from detaching from the sleeve (151).

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