A reaction liquid filtration and recovery device for the production of antioxidant KY-405
By using a multi-stage filter system and a high-pressure airflow cleaning device, the problem of filtering byproducts in the production of antioxidant KY-405 has been solved, achieving efficient filtration and cleaning, protecting the environment, and reducing catalyst consumption.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-26
- Publication Date
- 2026-03-13
AI Technical Summary
During the production of antioxidant KY-405, byproducts are difficult to filter completely, affecting the purity of the finished product and causing environmental pollution.
A multi-stage filter system is adopted, combined with a filter cleaning device controlled by high-pressure airflow and electric push rod, to achieve step-by-step filtration and automatic cleaning, ensuring that by-reaction products are collected and prevented from spreading.
It improves filtration efficiency, protects the environment, reduces catalyst consumption, and ensures the purity of the finished product and production efficiency.
Smart Images
Figure CN119488751B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of antioxidant production technology, and in particular to a reaction liquid filtration and recovery device for the production of antioxidant KY-405. Background Technology
[0002] Antioxidants are a class of chemical substances that can delay or inhibit the oxidation process of polymers. They usually have reducing properties and can significantly affect the oxidation rate of polymers when present in small amounts. Antioxidants have a wide range of applications, mainly including the food industry, rubber and plastics industry, and oil industry.
[0003] The main component of antioxidant KY-405 is 4,4'-bis(α,α-dimethylbenzyl)diphenylamine. This antioxidant appears as a white to light gray powder or small crystalline particles. Its production process is as follows: α-methylstyrene is metered and added to a reaction vessel, and bleaching clay is also added to the reaction vessel as a catalyst. Diphenylamine is then added dropwise to the reaction vessel, and the reaction vessel is heated to the start-up temperature of the reaction. Since the reaction between α-methylstyrene and diphenylamine is exothermic, the temperature is lowered according to the actual working conditions after the reaction begins. After the reaction is completed, the reaction liquid is collected and filtered. The filtered reaction liquid is pumped into a crystallization vessel and cooled and crystallized by adding petroleum ether. Finally, the crystals are separated into solid and liquid and dried to obtain the finished product.
[0004] Regarding the aforementioned technologies, the inventors believe that the following defects exist: In addition to generating 4,4'-bis(α,α-dimethylbenzyl)diphenylamine, the reaction of α-methylstyrene and diphenylamine in the reactor also involves side reactions such as the self-polymerization of α-methylstyrene and the secondary alkylation reaction of diphenylamine and α-methylstyrene. These side reactions generate some toxic and harmful alkylation byproducts. These byproducts are small particles, but because their volume is smaller and their quantity less than that of bleaching clay, filtration of the reaction solution typically only filters the bleaching clay, making it difficult to completely filter the byproducts. Byproducts entering subsequent steps affect the purity of the final product during crystallization and are easily diffused into the air. Byproducts blocked by filtration are also prone to diffusion due to lack of control, causing environmental pollution. The problem of solid waste pollution urgently needs to be addressed. Summary of the Invention
[0005] To address the problem of solid by-products easily diffusing into the air and causing pollution, this application provides a reaction liquid filtration and recovery device for the production of antioxidant KY-405.
[0006] The technical solution provided in this application for a reaction liquid filtration and recovery device for the production of antioxidant KY-405 is as follows:
[0007] A filtration and recovery device for the reaction liquid used in the production of antioxidant KY-405 includes several cylindrical bodies. Each cylindrical body has a detachable cover. An inlet pipe connects to the lower part of the cylindrical body's periphery, and an outlet pipe connects to the cover. A partition plate is located at one end of each cylindrical body near the cover. Several filter elements are inserted through the partition plate inside each cylindrical body. The cylindrical bodies are interconnected in series, with the filtration level of the filter elements in adjacent cylindrical bodies increasing sequentially. An air supply pipe connects to the top of the cover, and a discharge pipe with a valve connects to the bottom of the cylindrical body. A collection bucket is vertically mounted below the cylindrical body, and the discharge pipe is inserted into the collection bucket. Inside the collection bucket, the outer wall of the discharge pipe is in contact with the inner wall of the bucket opening. The collection bucket is connected to a nozzle that is connected to a water source. A water baffle is slidably raised and lowered inside the cylinder. The filter element passes through the water baffle. The water baffle is lower near the filter element and higher around the edges. The cylinder is equipped with a lifting device for raising and lowering the water baffle. A detection pipe is connected to the liquid outlet pipe. A suction pipe is connected to the detection pipe. A piston is slidably connected inside the suction pipe. An electric push rod is fixedly connected to the end of the suction pipe away from the detection pipe. The end of the electric push rod is fixedly connected to the piston. A liquid permeation pipe is opened on the suction pipe.
[0008] By adopting the above technical solution, the reaction liquid enters the cylinder through the inlet pipe, and then is drawn through the filter element. Solids such as bleaching clay and by-products in the reaction liquid are blocked by the filter element. The pre-filtered reaction liquid then enters the next cylinder, where it is filtered by a higher-level filter element. By-products in the filtered reaction liquid are collected on the filter elements to prevent them from affecting subsequent processing and the purity of the final product. During filtration, the operator periodically pulls the piston using an electric push rod to extract the reaction liquid. The extracted reaction liquid flows out through the permeate pipe, allowing for sampling and testing of the reaction liquid after each stage of filtration to assess the filtration performance of each filter element in the cylinder. If the sampled reaction liquid has a high content of solid impurities, then... The instructions state that the filter element needs cleaning. Simply stop the liquid supply from the inlet pipe, lower the water baffle using the lifting mechanism until a large gap remains between the baffle and the filter element, and then blow out a clean, high-pressure airflow through the air supply pipe. This airflow enters the filter element and blows it out, removing adhering solids such as bleaching clay and by-products. The solids falling from the filter element land on the water baffle and then fall through the opening into the discharge pipe. Open the valve and nozzle of the discharge pipe, and the solids fall into the collection bucket, where they are moistened by water mist sprayed from the nozzle, preventing them from scattering. After cleaning the filter element, simply lower the collection bucket, and staff will handle the solids in the bucket. This prevents by-product pollution of the environment and facilitates the recovery of bleaching clay, reducing catalyst consumption during production.
[0009] Optionally, an upper mounting ring is provided at the end of the partition plate away from the cover, and a lower mounting ring is provided at the end of the water baffle close to the partition plate. A material removal cloth sleeved on the surface of the filter element is fixed between the upper mounting ring and the lower mounting ring, and the length of the material removal cloth is not less than the distance between the upper mounting ring and the lower mounting ring when the water baffle is moved to the lowest position.
[0010] By adopting the above technical solution, during filter operation, the suction force causes the stripping cloth to be tightly adsorbed onto the filter surface. When the filter is severely clogged, solid matter clumps on the filter surface and the stripping cloth. When the air supply pipe blows air, the stripping cloth is supported by the high-pressure airflow. During the process of the stripping cloth being inflated, the clumps break and fall off due to the changes in the surface of the stripping cloth. The clumps on the stripping cloth also cause a small amount of solid matter on the filter to fall off. Combined with the unblocking effect of the high-pressure airflow, the efficiency of solid matter falling off the filter is further improved, the cleanliness of the filter is improved, and the phenomenon that some stubborn clumps are difficult to be blown off by the airflow is reduced.
[0011] Optionally, the upper mounting ring is rotatably connected to the partition plate, and the lower mounting ring is rotatably connected to the water baffle. The rotation axes of the upper mounting ring and the lower mounting ring are collinear, and the rotation axes of the upper mounting ring and the lower mounting ring are not collinear with the axis of the filter element. The filter element is tangent to the upper mounting ring. When the material removal cloth is in a free state, the material removal cloth portion at the tangent between the filter element and the upper mounting ring is in contact with the filter element. The upper mounting ring is provided with a power component for driving the upper mounting ring to rotate.
[0012] By adopting the above technical solution, when cleaning the filter element, the air pressure blown into each hole is relatively large because the filter element pores are small. However, the pores of the stripping cloth are relatively large. When most of the clumps on the stripping cloth fall off but a small number of stubborn clumps do not, the airflow accelerates and passes through the pores at the clumps that have fallen off. The air pressure impacting the clumps is relatively small. When the power component drives the mounting ring to rotate and the air supply pipe blows air, the filter element is always tangent to the bulging stripping cloth. The stripping cloth is driven to rotate by the power component, but the filter element does not rotate. This causes relative movement between the stripping cloth and the filter element at the tangent point, so that the filter element can remove the stubborn clumps on the stripping cloth.
[0013] Optionally, the power component is a plurality of fan blades fixed to the outer peripheral wall of the mounting ring. The partition plate is provided with vent holes corresponding to the fan blades. The partition plate is provided with a one-way valve at the vent holes, and the one-way valve only allows fluid to flow from the top of the partition plate to the bottom of the partition plate.
[0014] By adopting the above technical solution, when the air supply pipe blows air, the high-pressure airflow opens the one-way valve and blows out from the vent. The blown airflow acts on the fan blades, causing the upper mounting ring to rotate. The rotating upper mounting ring drives the stripping cloth to rotate. When the filter element is cleaned and filtration is performed, the pressure of the reaction liquid from bottom to top cannot open the one-way valve, thereby preventing unfiltered reaction liquid from flowing into the upper part of the partition plate through the vent. This structure is simple and highly reliable.
[0015] Optionally, a thermocouple thermometer is provided on the detection tube, with the display end of the thermocouple thermometer located outside the detection tube and the measuring end located inside the detection tube, and multiple electric heating rods are provided inside the cylinder.
[0016] By adopting the above technical solution, the thermocouple thermometer monitors the temperature of the reaction liquid flowing out after filtration in real time. Because 4,4'-bis(α,α-dimethylbenzyl)diphenylamine in the reaction liquid has a high melting point and the filtration process is long, some 4,4'-bis(α,α-dimethylbenzyl)diphenylamine will crystallize if the temperature of the mixed liquid is low during filtration. Therefore, the electric heating rod heats the reaction liquid during the filtration operation to keep it warm. When the operator observes that the temperature displayed by the thermocouple thermometer is lower than the standard range, the electric heating rod heats the reaction liquid, thereby preventing the 4,4'-bis(α,α-dimethylbenzyl)diphenylamine in the reaction liquid from crystallizing and being filtered by the filter element. This effectively reduces product loss during the filtration process and also reduces the filtration burden on the filter element.
[0017] Optionally, a liquid storage chamber is fixedly connected to the detection tube below the suction tube. The temperature measuring end of the thermocouple thermometer is located in the liquid storage chamber. Several connecting ropes are fixedly connected to one end of the piston away from the electric push rod. The maximum length of the connecting ropes is less than the maximum stroke of the piston. A lifting ring is fixedly connected to the other end of the connecting ropes. A valve plate is provided on the inner peripheral wall of the lifting ring. Elastic ropes are connected between the upper and lower ends of the lifting ring and the valve plate. When the elastic ropes are in a free state, the valve plate is located inside the lifting ring and blocks the lifting ring.
[0018] By adopting the above technical solution, before the filtration operation, to ensure that the detection accuracy of the thermocouple thermometer is within the error range, the operator can drive the piston upward by using an electric push rod. During this process, the connecting rope gradually stretches, and the lifting ring remains stationary due to gravity. At this time, the pressure between the lifting ring and the piston decreases, and the residual reaction liquid in the storage tank pushes the valve plate upward and enters the lifting ring. When the connecting rope is stretched to its longest length, the upward-moving piston causes the connecting rope to pull the lifting ring upward until the lifting ring is level with the height of the permeation pipe. At this time, the absorbed reaction liquid flows out from the permeation pipe, and then the electric push rod is driven downward. During this process, ice water is injected into the lifting ring through the permeation pipe, and the lifting ring also moves downward due to gravity until the lifting ring descends to the bottom. The electric push rod pushes the piston to squeeze the ice water, causing the ice water to break through the valve plate and enter the storage tank. At this time, the data of the thermocouple thermometer is observed and recorded. Then, the ice water is drained and boiling water is injected through the above steps, and the thermometer data is observed and recorded. Finally, the water temperature and the thermometer temperature are compared to roughly calculate whether the thermocouple thermometer display is within the error range.
[0019] Optionally, the lifting ring is ferromagnetic, and a limiting magnet is fixed to the outer peripheral wall of the detection tube, with the limiting magnet attracting the lifting ring.
[0020] By adopting the above technical solution, when the lifting ring descends to its lowest point, it is attracted by the limiting magnet. When the suction tube needs to pump liquid, the electric push rod drives the piston to move upward. The pressure at the upper end of the lifting ring is less than that at the lower end. At this time, the attraction force of the limiting magnet on the lifting ring prevents the pressure of the fluid below the lifting ring from pushing the lifting ring upward. That is, the lifting ring is kept stationary while the valve plate is raised by pressure, so that the fluid can smoothly enter the cavity between the lifting ring and the piston, thereby increasing the amount of liquid pumped each time for the same piston stroke.
[0021] Optionally, a guide plate for directing fluid into the storage tank is fixed inside the detection tube.
[0022] By adopting the above technical solution, during the filtration operation, the guide plate guides part of the filtered reaction liquid into the storage tank, so that there is always a timely filtered reaction liquid in the storage tank, avoiding the occurrence of similar results in the sampling inspection due to poor flow of the reaction liquid in the storage tank.
[0023] Optionally, the lifting component consists of several hydraulic cylinders fixed to the inner wall of the cylinder. The output end of the hydraulic cylinder is fixed to the water baffle. When the hydraulic cylinder is extended to its longest length, the height of the water baffle is higher than the lowest point of the filter element. When the hydraulic cylinder is retracted to its shortest length, a gap is left between the opening of the water baffle and the lowest point of the filter element.
[0024] By adopting the above technical solution, when it is necessary to drive the water baffle 3 to descend, it is only necessary to drive the hydraulic cylinder to extend; conversely, when it is necessary to drive the water baffle to descend, it is only necessary to retract the hydraulic cylinder 4. The structure is simple and the operation is convenient.
[0025] In summary, this application includes at least one of the following beneficial technical effects:
[0026] 1. The reaction liquid enters the cylinder through the inlet pipe, and is then drawn through the filter element. Solids such as bleaching clay and by-products in the reaction liquid are blocked by the filter element. The preliminarily filtered reaction liquid then enters the next cylinder, where it is filtered by a higher-level filter element. This step-by-step filtration process results in better filtration. By-products in the reaction liquid after each filtration are collected on the filter element to prevent them from affecting subsequent processing and the purity of the final product. The solids filtered by the filter element are collected in a collection tank for easy disposal by staff, thus preventing environmental pollution from by-products and facilitating the recovery of bleaching clay, thereby reducing catalyst consumption during production.
[0027] 2. When sampling and testing the filter structure of the corresponding cylinder, simply pull the piston upward by the electric push rod. During this process, the connecting rope is gradually straightened first. The lifting ring is not moved by gravity and the attraction of the limiting magnet. At this time, the pressure between the lifting ring and the piston decreases. The reaction liquid in the storage tank pushes the valve plate to move up and enter the lifting ring. When the connecting rope is stretched to its longest length, the distance between the lifting ring and the piston reaches the maximum. The pressure between the lifting ring and the piston remains unchanged. At this time, the valve plate is pulled by the elastic rope and re-seals the hole of the lifting ring until the height of the piston exceeds the liquid permeation pipe. The reaction liquid between the piston and the lifting ring gradually flows out from the liquid permeation pipe, so that the staff can collect and test it. The operation is simple and sampling can be carried out at any time.
[0028] 3. During the cleaning of the filter element, the water baffle is lowered by the lifting device, and then a clean high-pressure airflow is blown out through the air supply pipe. The airflow enters the filter element and blows it out to remove solid materials such as bleaching clay and by-reaction products adhering to the filter element. The solid materials falling from the filter element fall onto the water baffle. During this process, the high-pressure airflow will also open the one-way valve and blow out from the vent. The blown airflow acts on the fan blades, causing the upper mounting ring to rotate, which in turn causes relative movement between the stripping cloth and the filter element. That is, while the stripping cloth is rotating, it rubs and beats the filter element so that the filter element can remove the stubborn clumps on the stripping cloth. The fallen solid materials finally enter the collection bucket. The solid materials that fall into the collection bucket are moistened by the water mist sprayed from the nozzle to prevent the solid materials from flying around.
[0029] 4. When it is necessary to test the accuracy of the thermocouple thermometer before filtration, first raise the lifting ring to extract the residual reaction liquid inside the lifting ring. Then, drive the electric push rod to gradually push down. During this process, inject ice water into the lifting ring through the liquid permeation tube until the lifting ring reaches the bottom. The electric push rod then pushes the piston to squeeze the ice water, causing it to break through the valve plate and enter the storage tank. At this point, observe and record the thermocouple thermometer data. Then, follow the above steps to drain the ice water and inject boiling water, observe and record the thermometer data again. Finally, compare the water temperature with the thermometer temperature to roughly calculate whether the thermocouple thermometer display is within the error range. This means that the thermocouple thermometer can be calibrated at this point, and a sample of the reaction liquid in the liquid permeation tube can be extracted for testing. Attached Figure Description
[0030] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;
[0031] Figure 2 It is along Figure 1 A partial cross-sectional view of the structure along line AA in the middle;
[0032] Figure 3 yes Figure 2 Enlarged schematic diagram of part B in the middle;
[0033] Figure 4 This application is mainly used to show the cross-sectional structural schematic diagram of the detection tube, suction tube, piston, electric push rod, liquid permeation tube, liquid storage tank, connecting rope, lifting ring, valve plate, elastic rope, limiting magnet and guide plate.
[0034] Reference numerals: 11. Cylinder; 12. Cover; 13. Inlet pipe; 14. Outlet pipe; 15. Divider plate; 16. Filter element; 21. Air supply pipe; 22. Discharge pipe; 23. Collection tank; 231. Nozzle; 3. Water baffle; 4. Hydraulic cylinder; 51. Detection pipe; 52. Suction pipe; 53. Piston; 54. Electric push rod; 55. Liquid permeation pipe; 61. Upper mounting ring; 62. Lower mounting ring; 63. Material stripping cloth; 71. Fan blade; 72. Vent hole; 73. One-way valve; 81. Thermocouple thermometer; 82. Electric heating rod; 91. Liquid storage tank; 92. Connecting rope; 93. Lifting ring; 94. Valve plate; 95. Elastic rope; 96. Limiting magnet; 97. Guide plate. Detailed Implementation
[0035] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.
[0036] This application discloses a filtration and recovery device for the reaction liquid used in the production of antioxidant KY-405. (Refer to...) Figure 1 and Figure 2The reaction liquid filtration and recovery device for the production of antioxidant KY-405 includes several cylinders 11. A cover 12 is detachably connected to each cylinder 11 by bolts. An inlet pipe 13 is connected to the lower part of the circumferential wall of each cylinder 11, and an outlet pipe 14 is connected to the cover 12. A partition plate 15 is provided at one end of each cylinder 11 near the cover 12. Several filter elements 16 are installed inside each cylinder 11 through the partition plate 15. In this application, there are three cylinders 11, and each cylinder 11 contains six filter elements 16. The cylinders 11 are connected by a series connection. The filters are interconnected, and the filtration levels of the filter elements 16 between adjacent cylinders 11 increase sequentially. An air supply pipe 21 connected to a high-pressure clean air source is connected above the cover 12. A discharge pipe 22 with a valve is connected below the cylinder 11. A movable lifting frame is placed below the cylinder 11, and a collection bucket 23 is placed on the lifting frame. The discharge pipe 22 is inserted into the collection bucket 23, and the outer wall of the discharge pipe 22 is in contact with the inner wall of the opening of the collection bucket 23. A nozzle 231 connected to a water source is connected to the collection bucket 23. A water baffle 3 slides and rises inside the cylinder 11. The filter element 16 passes through the water baffle 3. The water baffle 3 is lower near the filter element 16 and higher around the edges. A lifting component for raising and lowering the water baffle 3 is provided on the cylinder 11. A detection tube 51 is connected to the liquid outlet pipe 14. A suction pipe 52 is connected to the detection tube 51. A piston 53 is slidably connected inside the suction pipe 52. An electric push rod 54 is fixedly connected to the end of the suction pipe 52 away from the detection tube 51. The end of the electric push rod 54 is fixedly connected to the piston 53. A liquid permeation pipe 55 is opened on the suction pipe 52.
[0037] The reaction solution enters the cylinder 11 through the inlet pipe 13, and is then drawn through the filter element 16. Solids such as bleaching clay and by-products in the reaction solution are blocked by the filter element 16. The pre-filtered reaction solution then enters the next cylinder 11, where it is filtered by a higher-level filter element 16. By-products in the reaction solution after each filtration are collected on the filter element 16 to prevent them from affecting subsequent processing and the purity of the final product. During filtration, the operator periodically pulls the piston 53 using the electric push rod 54 to extract the reaction solution. The extracted reaction solution is discharged through the permeate pipe 55, allowing for sampling and testing of the reaction solution after each filtration stage to assess the filtration performance of the filter elements 16 in each cylinder 11. If the sampled reaction solution has a high content of solid impurities, the filter element 16 needs to be cleaned. In this case, simply stop the inlet pipe 13 and lower the water baffle 3 using the lifting device. The water baffle 3 is separated from the filter element 16 with a large gap between them. Then, a clean high-pressure airflow is blown out through the air supply pipe 21. The airflow enters the filter element 16 and blows it out to remove solid materials such as bleaching clay and by-reaction products adhering to the filter element 16. The solid materials falling from the filter element 16 fall onto the water baffle 3 and fall into the discharge pipe 22 through the opening of the water baffle 3. The raising and lowering of the water baffle 3 facilitates the filtration of the reaction liquid in the cylinder 11 before removing impurities from the filter element 16, reducing the waste of reaction liquid when collecting solid materials. Then, the valve and nozzle 231 of the discharge pipe 22 are opened, and the solid materials fall into the collection bucket 23. They are moistened by the water mist sprayed from the nozzle 231 to prevent the solid materials from scattering. After the filter element 16 is cleaned, the height of the collection bucket 23 is lowered, and then the solid materials in the collection bucket 23 are disposed of by the staff. This avoids the pollution of the environment by by-reaction products and also facilitates the recovery of bleaching clay by the staff, thereby reducing the consumption of catalyst during production.
[0038] Reference Figure 2 and Figure 3 An upper mounting ring 61 is provided at the end of the partition plate 15 away from the cover 12, and a lower mounting ring 62 is provided at the end of the water baffle 3 near the partition plate 15. A material removal cloth 63 is fixed between the upper mounting ring 61 and the lower mounting ring 62 and sleeved on the surface of the filter element 16. A relatively large hole is left between the material removal cloth 63 and the lower mounting ring 62 for solid materials to pass through, and the length of the material removal cloth 63 is not less than the distance between the upper mounting ring 61 and the lower mounting ring 62 when the water baffle 3 is moved to the lowest position.
[0039] During the operation of filter element 16, the suction force causes the stripping cloth 63 to be tightly adsorbed onto the surface of filter element 16. When filter element 16 is severely clogged, solid matter clumps on the surface of filter element 16 and stripping cloth 63. When air is blown by air supply pipe 21, stripping cloth 63 is lifted by high-pressure airflow. During the process of lifting stripping cloth 63, the changes on the surface of stripping cloth 63 cause the clumps to break and fall off. The clumps on stripping cloth 63 also cause a small amount of solid matter on filter element 16 to fall off. Combined with the unblocking effect of high-pressure airflow, the efficiency of solid matter removal on filter element 16 is further improved, the cleanliness of filter element 16 is improved, and the phenomenon of some stubborn clumps being difficult to be blown off by airflow is reduced.
[0040] Reference Figure 2 and Figure 3 The upper mounting ring 61 is rotatably connected to the partition plate 15, and the lower mounting ring 62 is rotatably connected to the water baffle 3. The rotation axes of the upper mounting ring 61 and the lower mounting ring 62 are collinear. The rotation axes of the upper mounting ring 61 and the lower mounting ring 62 are not collinear with the axis of the filter element 16. The filter element 16 is tangent to the upper mounting ring 61. When the stripping cloth 63 is in a free state, the stripping cloth 63 at the tangent between the filter element 16 and the upper mounting ring 61 is in contact with the filter element 16. The upper mounting ring 61 is provided with a power component for driving the upper mounting ring 61 to rotate. The power component is a plurality of fan blades 71 fixed to the outer peripheral wall of the mounting ring. The partition plate 15 is provided with micro air vents 72 corresponding to the fan blades 71. The partition plate 15 is provided with a one-way valve 73 at the air vent 72. The one-way valve 73 only allows fluid to flow from the top of the partition plate 15 to the bottom of the partition plate 15.
[0041] When cleaning the filter element 16, the air pressure blown into each hole is relatively large because the holes of the filter element 16 are small. However, the holes of the stripping cloth 63 are relatively large. When most of the clumps on the stripping cloth 63 fall off but a small number of stubborn clumps do not fall off, the airflow accelerates and passes through the holes at the clumps on the stripping cloth 63. The air pressure impacting the clumps is relatively small. When the air supply pipe 21 blows air, the high-pressure airflow opens the one-way valve 73 and blows out from the vent 72. The blown airflow acts on the fan blade 71, causing the upper mounting ring 61 to rotate. The rotating upper mounting ring 61 drives the stripping cloth 63 to rotate. The filter element 16 is always tangent to the bulging stripping cloth 63, but the filter element 16 does not rotate. This causes relative movement between the stripping cloth 63 and the filter element 16 at the tangent point. That is, the stripping cloth 63 rubs and beats the filter element 16 while rotating, so that the filter element 16 can remove the stubborn clumps on the stripping cloth 63.
[0042] Reference Figure 2 and Figure 4A thermocouple thermometer 81 is installed on the detection tube 51. The display end of the thermocouple thermometer 81 is located outside the detection tube 51, and the measuring end is located inside the detection tube 51. Multiple electric heating rods 82 are installed inside the cylinder 11. The thermocouple thermometer 81 monitors the temperature of the reaction liquid flowing out after filtration in real time. Because 4,4'-bis(α,α-dimethylbenzyl)diphenylamine in the reaction liquid has a high melting point and the filtration process is long, some 4,4'-bis(α,α-dimethylbenzyl)diphenylamine will crystallize if the temperature of the mixed liquid is low during filtration. That is, the electric heating rods 82 heat the reaction liquid during the filtration operation to keep the reaction liquid warm. When the operator observes that the temperature displayed by the thermocouple thermometer 81 is lower than the standard range, the electric heating rods 82 heat the reaction liquid, thereby preventing the 4,4'-bis(α,α-dimethylbenzyl)diphenylamine in the reaction liquid from crystallizing and being filtered by the filter element 16. This effectively reduces product loss during the filtration process and also reduces the filtration burden on the filter element 16.
[0043] Reference Figure 4 A liquid storage chamber 91 is fixedly connected inside the detection tube 51 below the suction tube 52. The temperature measuring end of the thermocouple thermometer 81 is located inside the liquid storage chamber 91. Several connecting ropes 92 are fixedly connected to one end of the piston 53 away from the electric push rod 54. The maximum length of the connecting ropes 92 is less than the maximum stroke of the piston 53. A lifting ring 93 is fixedly connected to the other end of the connecting ropes 92. A valve plate 94 is provided on the inner peripheral wall of the lifting ring 93. Elastic ropes 95 are connected between the upper and lower ends of the lifting ring 93 and the valve plate 94. When the elastic ropes 95 are in a free state, the valve plate 94 is located inside the lifting ring 93 and seals the lifting ring 93.
[0044] Before the filtration operation, to ensure that the detection accuracy of the thermocouple thermometer 81 is within the error range, the operator can drive the piston 53 upward using the electric push rod 54. During this process, the connecting rope 92 first relaxes, and the lifting ring 93 remains stationary due to gravity. At this time, the pressure between the lifting ring 93 and the piston 53 decreases, and the residual reaction liquid in the storage tank 91 pushes the valve plate 94 upward and enters the lifting ring 93. When the connecting rope 92 reaches its maximum extension, the upward-moving piston 53 causes the connecting rope 92 to pull the lifting ring 93 upward until the lifting ring 93 is level with the liquid permeation pipe 55. At this time, the absorbed reaction liquid flows from the liquid permeation pipe 55. After the reaction liquid on the lifting ring 93 is cleaned, the electric push rod 54 is driven to gradually push down. During this process, ice water is injected into the lifting ring 93 through the liquid permeation pipe 55 until the lifting ring 93 descends to the bottom. The electric push rod 54 pushes the piston 53 to squeeze the ice water, causing the ice water to break through the valve plate 94 and enter the storage tank 91. At this time, the data of the thermocouple thermometer 81 is observed and recorded. Then, the ice water is discharged and boiling water is injected through the above steps. The thermometer data is observed and recorded. Finally, the water temperature and the thermometer temperature are compared to roughly calculate whether the display of the thermocouple thermometer 81 is within the error range.
[0045] Reference Figure 4 The lifting ring 93 is ferromagnetic. In this application, the lifting ring 93 is an iron ring. A limiting magnet 96 is fixed to the outer peripheral wall of the detection tube 51. The limiting magnet 96 and the lifting ring 93 attract each other. A guide plate 97 for guiding fluid into the storage tank 91 is fixed inside the detection tube 51.
[0046] During filtration, the guide plate 97 guides part of the filtered reaction liquid into the storage tank 91, ensuring that there is always a timely filtered reaction liquid in the storage tank 91, thus preventing similar results from being observed due to poor flow of the reaction liquid in the storage tank 91. When the lifting ring 93 descends to its lowest position, it is attracted by the limiting magnet 96. When the suction tube 52 needs to draw liquid, the electric push rod 54 drives the piston 53 to move upward. The pressure at the upper end of the lifting ring 93 is lower than that at the lower end. At this time, the attraction force of the limiting magnet 96 on the lifting ring 93 prevents the pressure of the fluid below the lifting ring 93 from pushing the lifting ring 93 upward. That is, the lifting ring 93 remains stationary while the valve plate 94 is raised by pressure, allowing the fluid to smoothly enter the cavity between the lifting ring 93 and the piston 53, increasing the amount of liquid drawn each time when the piston 53 has the same stroke.
[0047] Reference Figure 2 The lifting components consist of several hydraulic cylinders 4 fixed to the inner wall of the cylinder 11. The output end of the hydraulic cylinder 4 is fixed to the water baffle 3. When the hydraulic cylinder 4 is extended to its longest length, the height of the water baffle 3 is higher than the lowest point of the filter element 16. When the hydraulic cylinder 4 is retracted to its shortest length, there is a gap between the opening of the water baffle 3 and the lowest point of the filter element 16 to facilitate the falling of solid materials. When it is necessary to drive the water baffle 3 to descend, it is only necessary to drive the hydraulic cylinder 4 to extend. Conversely, when it is necessary to drive the water baffle 3 to descend, it is only necessary to retract the hydraulic cylinder 4. The structure is simple and the operation is convenient.
[0048] The implementation principle of the reaction liquid filtration and recovery device for the production of antioxidant KY-405 in this application embodiment is as follows: The reaction liquid enters the cylinder 11 from the inlet pipe 13, and then the reaction liquid is drawn through the filter element 16. Solids such as kaolin and by-reaction products in the reaction liquid are blocked by the filter element 16. Then the preliminarily filtered reaction liquid enters the next cylinder 11 and is filtered by the filter element 16 with a higher filtration level in the next cylinder 11. By-reaction products in the reaction liquid after sequential filtration are all collected on the filter element 16 to avoid the by-reaction products affecting the subsequent reaction liquid processing and the purity of the final product.
[0049] When sampling and testing of the filter structure of the corresponding cylinder 11 is required, the piston 53 is simply pulled up by the electric push rod 54. During this process, the connecting rope 92 first relaxes, and the lifting ring 93 remains stationary due to gravity and the attraction of the limiting magnet 96. At this time, the pressure between the lifting ring 93 and the piston 53 decreases, and the reaction liquid in the storage tank 91 pushes the valve plate 94 to move up and enter the lifting ring 93. When the connecting rope 92 is extended to its longest length, the distance between the lifting ring 93 and the piston 53 reaches its maximum, and the pressure between the lifting ring 93 and the piston 53 remains unchanged. At this time, the valve plate 94 is pulled by the elastic rope 95 and re-seals the hole of the lifting ring 93 until the height of the piston 53 exceeds the liquid permeation pipe 55. The reaction liquid between the piston 53 and the lifting ring 93 gradually flows out from the liquid permeation pipe 55 so that the staff can collect and test it.
[0050] During the cleaning of filter element 16, hydraulic cylinder 4 is activated and retracted, causing the water baffle 3 to descend. Clean, high-pressure airflow is then blown out through air supply pipe 21. This airflow enters and exits filter element 16, removing adhering solids such as bleaching clay and byproducts. The solids falling from filter element 16 land on the water baffle 3. During this process, the high-pressure airflow also opens one-way valve 73 and exits through vent 72. The airflow acts on fan blade 71, causing upper mounting ring 61 to rotate. The rotating upper mounting ring 61 then drives the material removal cloth 63 to rotate. The filter element 16 is always tangential to the bulging stripping cloth 63. Since the filter element 16 does not rotate, the stripping cloth 63 moves relative to the filter element 16 at the tangent point. That is, while the stripping cloth 63 rotates, it rubs and beats the filter element 16, so that the filter element 16 can remove the stubborn clumps on the stripping cloth 63 and drop them onto the water baffle 3. The clumps then fall into the discharge pipe 22 through the opening of the water baffle 3. Then, the valve and nozzle 231 of the discharge pipe 22 are opened, and the solid material falls into the collection bucket 23. The solid material is moistened by the water mist sprayed from the nozzle 231 to prevent it from scattering everywhere.
[0051] Before performing filtration, it is necessary to test the accuracy of the thermocouple thermometer 81. First, raise the lifting ring 93 to extract the residual reaction liquid inside the lifting ring 93. Then, drive the electric push rod 54 to gradually push it down. During this process, ice water is injected into the lifting ring 93 through the liquid permeation pipe 55 until the lifting ring 93 descends to the bottom. The electric push rod 54 pushes the piston 53 to squeeze the ice water, causing the ice water to break through the valve plate 94 and enter the liquid storage chamber 91. At this time, observe and record the data of the thermocouple thermometer 81. Then, drain the ice water and inject boiling water through the above steps, observe and record the thermometer data, and finally compare the water temperature with the thermometer temperature to roughly calculate whether the display of the thermocouple thermometer 81 is within the error range.
[0052] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A reaction liquid filtration and recovery device for the production of antioxidant KY-405, characterized in that: The utility model provides a filter, including several cylinder (11), the detachable setting of cover (12) on cylinder (11), the lower side of cylinder (11) is connected with liquid inlet pipe (13), cover (12) is connected with liquid outlet pipe (14), cylinder (11) is close to the one end of cover (12) and is provided with the partition (15), cylinder (11) is in the partition (15) and is provided with several filter core (16) in cylinder (11), cylinder (11) and cylinder (11) are communicated with each other through series connection, and the filter grade of filter core (16) between adjacent cylinder (11) improves gradually, the upper side of cover (12) is connected with gas supply pipe (21), the lower side of cylinder (11) is connected with the valve of unloading pipe (22), the lower side of cylinder (11) is provided with the collecting bucket (23) of lifting, unloading pipe (22) inserts into collecting bucket (23), and the outer wall of unloading pipe (22) is attached with the bucket mouth inner wall of collecting bucket (23), and the upper side of collecting bucket (23) is connected with the nozzle (231) of water source communication, The water shield is slidably lifted in the cylinder (11), the filter core (16) penetrates the water shield, the water shield is lower near the filter core (16), and the periphery is higher, the lifting part for lifting the water shield is arranged on the cylinder (11); The detection pipe (51) is connected with the suction pipe (52) on the liquid outlet pipe (14), the piston (53) is slidably connected in the suction pipe (52), the electric push rod (54) is fixedly connected with the piston (53) at the end of the suction pipe (52) away from the detection pipe (51), and the liquid permeable pipe (55) is arranged on the suction pipe (52); The upper mounting ring (61) is arranged on the one end of the partition (15) away from the cover (12), the lower mounting ring is arranged on the one end of the water shield close to the partition (15), the stripping cloth (63) is fixedly connected between the upper mounting ring (61) and the lower mounting ring and is sleeved on the surface of the filter core (16), and the length of the stripping cloth (63) is not less than the distance between the upper mounting ring (61) and the lower mounting ring when the water shield moves to the lowest position. The upper mounting ring (61) is rotationally connected to the partition (15), the lower mounting ring is rotationally connected to the water shield, the rotation axes of the upper mounting ring (61) and the lower mounting ring are collinear, the rotation axes of the upper mounting ring (61) and the lower mounting ring are not collinear with the axis of the filter core (16), the filter core (16) is inscribed in the upper mounting ring (61), when the stripping cloth (63) is in a free state, the part of the stripping cloth (63) at the tangent line between the filter core (16) and the upper mounting ring (61) is attached to the filter core (16), and the power member for driving the rotation of the upper mounting ring (61) is arranged on the upper mounting ring (61).
2. The reaction liquid filtering and recycling device for producing antioxidant KY-405 according to claim 1, characterized in that the power element is a plurality of fan blades (71) fixed on the outer peripheral wall of the upper mounting ring (61), the partition plate (15) is provided with air holes (72) corresponding to the fan blades (71), the partition plate (15) is provided with one-way valves (73) at the air holes (72), and the one-way valves (73) only allow fluid to flow from above the partition plate (15) to below the partition plate (15).
3. The reaction liquid filtering and recycling device for producing antioxidant KY-405 according to claim 1, characterized in that the detection tube (51) is provided with a thermocouple thermometer (81), the display end of the thermocouple thermometer (81) is located outside the detection tube (51), the measuring end is located inside the detection tube (51), and the cylinder (11) is provided with a plurality of electric heating rods (82).
4. The reaction liquid filtering and recycling device for producing antioxidant KY-405 according to claim 3, characterized in that the detection tube (51) is fixed with a liquid storage bin (91) below the suction tube (52), the temperature measuring end of the thermocouple thermometer (81) is located inside the liquid storage bin (91), one end of the piston (53) away from the electric push rod (54) is fixed with a plurality of connecting ropes (92), the maximum length of the connecting ropes (92) is less than the maximum stroke of the piston (53), the other end of the connecting ropes (92) is fixed with a lifting ring (93), the inner peripheral wall of the lifting ring (93) is provided with a valve plate (94), the upper and lower ends of the lifting ring (93) are connected with elastic ropes (95) on both sides of the valve plate (94), and when the elastic ropes (95) are in a free state, the valve plate (94) is located inside the lifting ring (93) and blocks the lifting ring (93).
5. The reaction liquid filtering and recycling device for producing antioxidant KY-405 according to claim 4, characterized in that the lifting ring (93) has ferromagnetism, the outer peripheral wall of the detection tube (51) is fixed with a limiting magnet (96), and the limiting magnet (96) and the lifting ring (93) are attracted to each other.
6. The reaction liquid filtering and recycling device for producing antioxidant KY-405 according to claim 5, characterized in that the detection tube (51) is fixed with a flow guide plate (97) for guiding fluid into the liquid storage bin (91).
7. The reaction liquid filtering and recycling device for producing antioxidant KY-405 according to claim 1, characterized in that the lifting element is a plurality of hydraulic cylinders (4) fixed on the inner wall of the cylinder (11), the output end of the hydraulic cylinder (4) is fixed with the water baffle, when the hydraulic cylinder (4) is stretched to the longest, the height of the water baffle is higher than the lowest part of the filter element (16), and when the hydraulic cylinder (4) is contracted to the shortest, there is a gap between the opening of the water baffle and the lowest part of the filter element (16).
Citation Information
Patent Citations
Filter core is from washing secondary filter
CN208372578U
Pulse cloth cylinder dust remover
CN213049887U