Reaction liquid filtering and recycling device for antioxidant KY-405 production

Abstract

The invention relates to the technical field of antioxidant production, and particularly discloses a reaction liquid filtering and recycling device for antioxidant KY-405 production, which comprises a barrel body and a cover body, a liquid inlet pipe is communicated with the lower part of the peripheral wall of the barrel body, a liquid outlet pipe is communicated with the cover body, a partition plate is arranged at one end, close to the cover body, of the barrel body, and a plurality of filter elements are arranged on the partition plate in the barrel body in a penetrating manner; the upper part of the cover body is communicated with an air supply pipe, the lower part of the barrel body is communicated with a discharge pipe with a valve, a collecting barrel is arranged below the barrel body in a lifting manner, and the collecting barrel is communicated with a nozzle communicated with a water source; a water retaining cover is slidably lifted in the barrel, the filter element penetrates through the water retaining cover, and a lifting part for lifting the water retaining cover is arranged on the barrel; the liquid outlet pipe is communicated with a detection pipe, the detection pipe is communicated with a suction pipe, a piston is slidably connected in the suction pipe, an electric push rod is fixedly connected between the suction pipe and the piston, and a liquid permeable pipe is arranged on the suction pipe. The device has the effects of conveniently collecting polluted side reaction products and carrying out spot check on the filtered reaction liquid.

Description

Technical Field

[0001] The present application relates to the technical field of antioxidant production, and in particular to a reaction liquid filtering and recovery device for the production of antioxidant KY-405. Background Art

[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. The antioxidant appears as white to light gray powder or small crystal particles. Its production process is as follows: α-methylstyrene is measured and added into a reactor, and white clay is also added into the reactor as a catalyst, and then diphenylamine is added dropwise into the reactor, and then the reactor is heated to the starting temperature of the reaction. Since the reaction between α-methylstyrene and diphenylamine is an exothermic reaction, the temperature is lowered according to the actual working conditions after the reaction starts. After the reaction is completed, the reaction liquid is drawn and filtered, and the filtered reaction liquid is pumped into a crystallization kettle and cooled and crystallized by adding petroleum ether. Finally, the crystals are separated from the solid and liquid and dried to obtain the finished product.

[0004] With respect to the above-mentioned related 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 generates side reactions such as self-polymerization of α-methylstyrene and side alkylation of diphenylamine and α-methylstyrene. Some toxic and harmful alkylation side reaction products are generated during the side reactions. These side reaction products are in the form of small particles. However, since the volume of the side reaction products is smaller than that of the clay and the number is smaller, when filtering the reaction liquid, usually only the clay is filtered, and it is difficult to completely filter the side reaction products. The side reaction products that enter the subsequent steps will affect the purity of the finished product during crystallization and are easily diffused into the air. The side reaction products blocked by the filtration are also easily diffused due to lack of control, causing environmental pollution. The solid waste pollution problem needs to be solved urgently. Summary of the invention

[0005] In order to improve the problem that solid side reaction products are easily diffused into the air and cause pollution, the present application provides a reaction liquid filtering and recovery device for the production of antioxidant KY-405.

[0006] The present application provides a reaction liquid filtration and recovery device for the production of antioxidant KY-405, which adopts the following technical solution:

[0007] A reaction liquid filtering and recovery device for the production of antioxidant KY-405, comprising a plurality of cylinders, a cover body detachably provided on the cylinder, a liquid inlet pipe connected to the lower part of the cylinder peripheral wall, a liquid outlet pipe connected to the cover body, a partition plate provided at one end of the cylinder close to the cover body, a plurality of filter elements penetrated on the partition plate in the cylinder, the cylinders are connected to each other in series, and the filtration levels of the filter elements between adjacent cylinders are successively improved, an air supply pipe is connected to the upper part of the cover body, a discharge pipe with a valve is connected to the lower part of the cylinder, a collecting bucket is provided for lifting and lowering below the cylinder, and the discharge pipe is inserted into the In the collecting barrel, the outer wall of the discharge pipe is fitted with the inner wall of the barrel mouth of the collecting barrel, and the collecting barrel is connected with a nozzle connected with a water source; a water shield is slidably raised and lowered in the cylinder body, and the filter element passes through the water shield, the water shield is lower near the filter element and higher around, and a lifting part for raising and lowering the water shield is provided on the cylinder body; a detection tube is connected to the liquid outlet pipe, and a suction tube is connected to the detection tube, and a piston is slidably connected in the suction tube, and an electric push rod is fixedly connected to the end of the suction tube away from the detection tube, and the end of the electric push rod is fixedly connected to the piston, and a liquid permeable tube is opened on the suction tube.

[0008] By adopting the above technical scheme, the reaction liquid enters into the cylinder from the liquid inlet pipe, and then the reaction liquid is sucked through the filter element. Solids such as clay and side reaction products in the reaction liquid passing through the filter element are blocked by the filter element. Then the preliminarily filtered reaction liquid enters into the next cylinder and is filtered by the filter element with higher filtration grade in the next cylinder. Side reaction products in the reaction liquid after filtering are collected on the filter element in turn to avoid the side reaction products affecting the subsequent reaction liquid processing operation and the purity of the final product. When the reaction liquid is filtered, the staff periodically pulls the piston through the electric push rod to extract the reaction liquid. The extracted reaction liquid is retained from the liquid permeable pipe, which is convenient for the staff to sample and test the reaction liquid after each stage of filtration to judge the filtration condition of the filter element in each cylinder. When the sampled reaction liquid contains a high content of solid impurities, then This indicates that the filter element needs to be cleaned. At this time, you only need to stop the liquid supply from the liquid inlet pipe, lower the water retaining cover through the lifting part until there is a large gap between the water retaining cover and the filter element, and then blow out a clean high-pressure airflow through the air supply pipe. The airflow enters the filter element and blows out to blow out the kaolin, side reaction products and other solid substances adhering to the filter element. The solid matter that falls from the filter element falls on the water retaining cover and falls into the discharge pipe from the opening of the water retaining cover. Then open the valve and nozzle of the discharge pipe, and the solid matter falls into the collecting bucket and is moistened by the water mist sprayed from the nozzle to prevent the solid matter from flying around. After the filter element is cleaned, you only need to lower the height of the collecting bucket, and then the staff will uniformly handle the solid matter in the collecting bucket, thereby avoiding pollution of the environment by side reaction products. It is also convenient for the staff to recycle the kaolin to reduce the consumption of catalyst during production.

[0009] Optionally, an upper mounting ring is provided at one end of the partition plate away from the cover body, and a lower mounting ring is provided at one end of the water shield close to the partition plate, and a stripping cloth sleeved on the surface of the filter element is fixedly connected between the upper mounting ring and the lower mounting ring, and the length of the stripping cloth is not less than the distance between the upper mounting ring and the lower mounting ring when the water shield moves to the lowest position.

[0010] By adopting the above technical scheme, when the filter element is operating, the stripping cloth is tightly adsorbed on the surface of the filter element due to the effect of suction. When the filter element is seriously blocked, solid matter clumps on the surface of the filter element and the stripping cloth. When the air supply pipe blows air, the stripping cloth is propped up by the high-pressure airflow. During the swelling process, the stripping cloth causes the clumps to break and fall off due to the changes on the surface of the stripping cloth. The clumps on the stripping cloth also cause a small amount of solid matter on the filter element to fall off. Combined with the dredging effect of the high-pressure airflow, the efficiency of the solid matter falling off on the filter element is further improved, and the cleanliness of the filter element is also improved, reducing the phenomenon that some stubborn clumps are difficult to be blown off by the airflow.

[0011] Optionally, the upper mounting ring is rotatably connected to the partition plate, and the lower mounting ring is rotatably connected to the water retaining cover, and the rotation axes of the upper mounting ring and the lower mounting ring are colinear, and the rotation axes of the upper mounting ring and the lower mounting ring are not colinear with the axis of the filter element, and the filter element is inscribed in the upper mounting ring. When the stripping cloth is in a free state, the stripping cloth portion at the tangent between the filter element and the upper mounting ring fits with the filter element, and the upper mounting ring is provided with a power part for driving the upper mounting ring to rotate.

[0012] By adopting the above technical scheme, when the filter element is cleaned, since the holes of the filter element are small, the air pressure blown to each hole is relatively large, but the holes of the stripping cloth are relatively large. When most of the lumps on the stripping cloth fall off and a small number of stubborn lumps have not fallen off, the airflow accelerates to pass through the holes at the detached position on the stripping cloth, and the air pressure impacting the lump position is relatively small. When the power part drives the upper mounting ring to rotate and the air supply pipe blows air, the filter element is always inscribed on the bulging stripping cloth, and the stripping cloth is driven by the power part to rotate, but the filter element does not rotate, thereby causing the stripping cloth and the filter element to move relative to each other at the tangent point, so that the filter element can remove the stubborn lumps on the stripping cloth.

[0013] Optionally, the power component is a plurality of fan blades fixedly connected to the outer peripheral wall of the mounting ring, and the partition plate is provided with air holes corresponding to the fan blades. The partition plate is provided with a one-way valve at the air hole, 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 air hole. The blown airflow acts on the fan blades to rotate the upper mounting ring. The rotating upper mounting ring drives the stripping cloth to rotate. When the filter element is cleaned and the filtering operation is performed, the reaction liquid pressure from bottom to top cannot open the one-way valve, thereby preventing the unfiltered reaction liquid from flowing from the air hole to the top of the partition plate. The structure is simple and reliable.

[0015] Optionally, a thermocouple thermometer is provided on the detection tube, a display end of the thermocouple thermometer is located outside the detection tube, and a measuring end is located inside the detection tube, and a plurality of 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 after filtering in real time. Since the melting point of 4,4'-bis(α,α-dimethylbenzyl)diphenylamine in the reaction liquid is relatively high and the filtration process is relatively long, if the temperature of the mixed liquid is relatively low during filtration, part of the 4,4'-bis(α,α-dimethylbenzyl)diphenylamine will crystallize, that is, the electric heating rod heats the reaction liquid during the filtration operation to keep the reaction liquid warm. When the staff 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, thereby effectively reducing the loss of products during the filtration process and reducing the filtration burden of the filter element.

[0017] Optionally, a liquid storage tank is fixedly connected in the detection tube below the suction tube, the temperature measuring end of the thermocouple thermometer is located in the liquid storage tank, a plurality of connecting ropes are fixedly connected to one end of the piston away from the electric push rod, the maximum length of the connecting rope is less than the maximum stroke of the piston movement, the other end of the connecting rope is fixedly connected to a lifting ring, a valve plate is provided on the inner circumferential wall of the lifting ring, elastic ropes are connected between the upper and lower ends of the lifting ring and the valve plate, and when the elastic rope is in a free state, the valve plate is located in the lifting ring and seals the lifting ring.

[0018] By adopting the above technical solution, before the filtering operation, in order to determine that the detection accuracy of the thermocouple thermometer is within the error range, the staff can drive the piston to rise through the electric push rod. During this process, the connecting rope gradually relaxes, and the lifting ring does not move due to gravity. At this time, the pressure between the lifting ring and the piston decreases, and the reaction liquid remaining in the liquid storage tank pushes the valve plate up and enters the lifting ring. When the connecting rope is stretched to the longest, the upward piston causes the connecting rope to pull the lifting ring up until the lifting ring is flush with the height of the liquid permeable tube. At this time, the absorbed reaction liquid flows out of the liquid permeable tube, and then drives the electric push rod to push down. During this process, ice water is injected into the lifting ring through the liquid permeable tube. The lifting ring also moves downward due to gravity until the lifting ring drops to the bottom. The electric push rod pushes the piston to squeeze the ice water, so that the ice water breaks through the valve plate and enters the liquid storage tank. At this time, observe and record the data of the thermocouple thermometer, and then discharge the ice water and inject boiling water through the above steps, observe and record the data of the thermometer, and finally compare the water temperature with the temperature of the thermometer to roughly calculate whether the display of the thermocouple thermometer is within the error range.

[0019] Optionally, the lifting ring is ferromagnetic, and a limiting magnet is fixedly connected to the outer peripheral wall of the detection tube, and the limiting magnet and the lifting ring attract each other.

[0020] By adopting the above technical solution, when the lifting ring drops to the lowest point, the lifting ring 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 suction force of the limiting magnet acting 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 rises under pressure, so that the fluid smoothly enters the cavity between the lifting ring and the piston, thereby increasing the amount of liquid sucked each time with the same piston stroke.

[0021] Optionally, a guide plate for guiding the fluid into the liquid storage bin is fixedly connected in the detection tube.

[0022] By adopting the above technical solution, during the filtering operation, the guide plate guides part of the filtered reaction liquid into the liquid storage tank, so that there is always timely filtered reaction liquid in the liquid storage tank, avoiding similar results in random inspections due to poor circulation of the reaction liquid in the liquid storage tank.

[0023] Optionally, the lifting members are a plurality of hydraulic cylinders fixedly connected to the inner wall of the cylinder, and the output ends of the hydraulic cylinders are fixedly connected to the water retaining cover. When the hydraulic cylinders are extended to their longest length, the height of the water retaining cover is higher than the lowest point of the filter element. When the hydraulic cylinders are contracted to their shortest length, a gap is left between the opening of the water retaining cover and the lowest point of the filter element.

[0024] By adopting the above technical solution, when it is necessary to drive the water shield 3 to descend, it is only necessary to drive the hydraulic cylinder to extend. Conversely, when it is necessary to drive the water shield to descend, it is only necessary to retract the hydraulic cylinder 4. The structure is simple and the operation is easy.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. The reaction liquid enters the cylinder from the liquid inlet pipe, and then the reaction liquid is sucked through the filter element. The solids such as clay and side reaction products in the reaction liquid passing through the filter element are blocked by the filter element. Then the preliminarily filtered reaction liquid enters the next cylinder and is filtered by the filter element with a higher filtration grade in the next cylinder. The filtering effect of step-by-step filtration is better. The side reaction products in the reaction liquid after filtering are collected on the filter element to avoid the side reaction products affecting the subsequent reaction liquid processing operations and the purity of the final product. The solid substances filtered by the filter element finally enter the collection barrel, which is convenient for the staff to uniformly handle the solid substances in the collection barrel, thereby avoiding the pollution of the side reaction products to the environment. At the same time, it is also convenient for the staff to recover the clay to reduce the consumption of catalysts during production;

[0027] 2. When sampling and testing the filtration structure of the corresponding cylinder, it is only necessary to pull the piston up through the electric push rod. During this process, the connecting rope is gradually straightened first, and the lifting ring is immobilized by gravity and the suction of the limit magnet. At this time, the pressure between the lifting ring and the piston decreases, and the reaction liquid in the liquid storage tank pushes the valve plate up and enters the lifting ring. When the connecting rope is stretched to the longest, the lifting ring and the piston reach the maximum distance, and 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-blocks the hole of the lifting ring until the height of the piston exceeds the liquid permeable tube. The reaction liquid between the piston and the lifting ring gradually flows out from the liquid permeable tube, so that the staff can collect and test it. The operation is simple, and sampling operations can be carried out at any time;

[0028] 3. When cleaning the filter element, the water shield is lowered by the lifting member, and then a clean high-pressure airflow is blown out through the air supply pipe. The airflow enters the filter element and blows out to blow out the solid substances such as white clay and side reaction products adhering to the filter element. The solid substances dropped from the filter element fall on the water shield. During this process, the high-pressure airflow will also blow open the one-way valve and blow out from the air vent. The blown airflow acts on the fan blades to rotate the upper mounting ring, thereby causing the stripping cloth and the tangent part of the filter element to move relative to each other, that is, the stripping cloth rubs and beats the filter element while rotating, so that the filter element can remove the stubborn lumps on the stripping cloth. The dropped solid substances finally enter the collection bucket, and the solid substances dropped into the collection bucket are moistened by the water mist sprayed from the nozzle to prevent the solid substances from flying around.

[0029] 4. When the accuracy of the thermocouple thermometer needs to be tested before filtering, first raise the lifting ring to extract the residual reaction liquid in the lifting ring, and then drive the electric push rod to gradually push down. During this process, ice water is injected into the lifting ring through the liquid permeable tube until the lifting ring drops to the bottom. The electric push rod pushes the piston to squeeze the ice water, so that the ice water breaks through the valve plate and enters the liquid storage tank. At this time, observe and record the data of the thermocouple thermometer, and then discharge the ice water and inject boiling water through the above steps, observe and record the data of the thermometer, and finally compare the water temperature with the temperature of the thermometer to roughly calculate whether the display of the thermocouple thermometer is within the error range. That is, this place can not only calibrate the thermocouple thermometer, but also extract the reaction liquid sample in the extraction tube for testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0031] Figure 2 is along Figure 1 Schematic diagram of the partial cross-section structure along the AA line;

[0032] Figure 3 yes Figure 2 A magnified schematic diagram of part B;

[0033] Figure 4 This application is mainly used to show the cross-sectional structural diagram of the detection tube, suction tube, piston, electric push rod, liquid-permeable tube, liquid storage tank, connecting rope, lifting ring, valve plate, elastic rope, limit magnet and guide plate.

[0034] 1. The vent pipe is made of stainless steel and the vent pipe is made of stainless steel. The vent pipe is made of stainless steel and the vent pipe is made of stainless steel. 2. The vent pipe is made of stainless steel and the vent pipe is made of stainless steel. 3. The vent pipe is made of stainless steel and the vent pipe is made of stainless steel. 4. The vent pipe is made of stainless steel and the vent pipe is made of stainless steel. 5. The vent pipe is made of stainless steel and the vent pipe is made of stainless steel. 6. The vent pipe is made of stainless steel and the vent pipe is made of stainless steel. 7. The vent pipe is made of stainless steel and the vent pipe is made of stainless steel. 8. The vent pipe is made of stainless steel and the vent pipe is made of stainless steel. 9. The vent pipe is made of stainless steel and the vent pipe is made of stainless steel. DETAILED DESCRIPTION

[0035] The following is combined with Figure 1-4 This application is described in further detail.

[0036] The present application discloses a reaction liquid filtration and recovery device for the production of antioxidant KY-405. Figure 1 and Figure 2The reaction liquid filtering and recovery device for the production of antioxidant KY-405 includes a plurality of cylinders 11, a cover 12 is detachably connected to the cylinder 11 by bolts, a liquid inlet pipe 13 is connected to the lower part of the peripheral wall of the cylinder 11, and a liquid outlet pipe 14 is connected to the cover 12. A partition plate 15 is arranged at one end of the cylinder 11 close to the cover 12, and a plurality of filter elements 16 are arranged on the partition plate 15 in the cylinder 11. In the present application, there are three cylinders 11, and each cylinder 11 has six filter elements 16. The cylinders 11 and the cylinders 11 are connected by a series connection. The cylinders 11 are interconnected in a linked manner, and the filtration levels of the filter elements 16 between adjacent cylinders 11 are successively improved. An air supply pipe 21 connected to a high-pressure clean air source is connected to the top of the cover body 12, and a discharge pipe 22 with a valve is connected to the bottom of the cylinder 11. A movable lifting frame is placed under the cylinder 11, and a collecting barrel 23 is placed on the lifting frame. The discharge pipe 22 is inserted into the collecting barrel 23, and the outer wall of the discharge pipe 22 is in contact with the inner wall of the barrel mouth of the collecting barrel 23. The collecting barrel 23 is connected to a nozzle 231 connected to a water source. A water shield 3 is slidably raised and lowered in the cylinder 11, and the filter element 16 passes through the water shield 3. The water shield 3 is lower near the filter element 16 and higher around it. A lifting member for raising and lowering the water shield 3 is provided on the cylinder 11; a detection tube 51 is connected to the liquid outlet pipe 14, and a suction tube 52 is connected to the detection tube 51. A piston 53 is slidably connected in the suction tube 52, and an electric push rod 54 is fixedly connected to the end of the suction tube 52 away from the detection tube 51, and the end of the electric push rod 54 is fixedly connected to the piston 53. A liquid permeable tube 55 is provided on the suction tube 52.

[0037] The reaction liquid enters the cylinder 11 from the liquid inlet pipe 13, and then the reaction liquid is sucked through the filter element 16. Solids such as clay and side reaction products in the reaction liquid passing through the filter element 16 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. The side reaction products in the reaction liquid after filtering are collected on the filter element 16 to prevent the side reaction products from affecting the subsequent reaction liquid processing operations and the purity of the final product. When the reaction liquid is filtered, the staff periodically pulls the piston 53 through the electric push rod 54 to extract the reaction liquid. The extracted reaction liquid is retained at the liquid permeable pipe 55, which is convenient for the staff to sample and test the reaction liquid after each stage of filtration to determine the filtration condition of the filter element 16 in each cylinder 11. When the sampled reaction liquid has a high content of solid impurities, it means that the filter element 16 needs to be cleaned. At this time, it is only necessary to stop the liquid supply from the liquid inlet pipe 13 and lower the water retaining cover 3 through the lifting member. The water shield 3 is separated from the filter element 16 with a large gap between them, and then a clean high-pressure airflow is blown out through the air supply pipe 21. The airflow enters the filter element 16 and is blown out to blow out the white clay, side reaction products and other solid substances adhered to the filter element 16. The solid substances falling from the filter element 16 fall on the water shield 3 and fall into the discharge pipe 22 from the opening of the water shield 3. The lifting of the water shield 3 facilitates the filtering of the reaction liquid in the cylinder 11 before removing the impurities from the filter element 16, thereby reducing the waste of the reaction liquid when collecting the solid substances. Then the valve and nozzle 231 of the discharge pipe 22 are opened, and the solid substances fall into the collection barrel 23 and are moistened by the water mist sprayed from the nozzle 231 to prevent the solid substances from flying around. After the filter element 16 is cleaned, it is only necessary to lower the height of the collection barrel 23, and then the staff will uniformly handle the solid substances in the collection barrel 23, thereby avoiding the pollution of the side reaction products to the environment. At the same time, it is also convenient for the staff to recover the white clay to reduce the consumption of the catalyst during production.

[0038] Reference Figure 2 and Figure 3 An upper mounting ring 61 is provided at one end of the partition plate 15 away from the cover body 12, and a lower mounting ring 62 is provided at one end of the water retaining cover 3 close to the partition plate 15, and a stripping cloth 63 sleeved on the surface of the filter element 16 is fixedly connected between the upper mounting ring 61 and the lower mounting ring 62, and a larger hole is left between the stripping cloth 63 and the lower mounting ring 62 for solid matter to pass through, 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 62 when the water retaining cover 3 moves to the lowest position.

[0039] When the filter element 16 is operating, due to the effect of suction, the stripping cloth 63 is tightly adsorbed on the surface of the filter element 16. When the filter element 16 is severely blocked, solid matter clumps on the surface of the filter element 16 and the stripping cloth 63. When the air supply pipe 21 blows air, the stripping cloth 63 is propped up by the high-pressure airflow. During the swelling process, the stripping cloth 63 causes the clumps to break and fall off due to the changes on the surface of the stripping cloth 63. The clumps on the stripping cloth 63 also cause a small amount of solid matter on the filter element 16 to fall off. Combined with the dredging effect of the high-pressure airflow, the efficiency of the solid matter falling off on the filter element 16 is further improved, and the cleanliness of the filter element 16 is also improved, reducing the phenomenon that some stubborn clumps are difficult to be blown off by the airflow.

[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 shield 3, and the rotation axes of the upper mounting ring 61 and the lower mounting ring 62 are colinear, and the rotation axes of the upper mounting ring 61 and the lower mounting ring 62 are not colinear with the axis of the filter element 16, and the filter element 16 is inscribed in the upper mounting ring 61. When the stripping cloth 63 is in a free state, the stripping cloth 63 part at the tangent between the filter element 16 and the upper mounting ring 61 fits with the filter element 16, and a power part for driving the upper mounting ring 61 to rotate is provided on the upper mounting ring 61, and the power part is a plurality of fan blades 71 fixedly connected to the outer peripheral wall of the mounting ring, and micro air holes 72 are opened at the corresponding positions of the partition plate 15 and the fan blades 71, and a one-way valve 73 is provided at the air hole 72 of the partition plate 15, and the one-way valve 73 only allows the fluid to flow from the top of the partition plate 15 to the bottom of the partition plate 15.

[0041] When the filter element 16 is cleaned, since the holes of the filter element 16 are small, the air pressure blown to each hole is relatively large, but the holes of the stripping cloth 63 are relatively large. When most of the lumps on the stripping cloth 63 fall off and a small number of stubborn lumps have not fallen off, the air flow accelerates to pass through the holes at the detached position on the stripping cloth 63, and the air pressure impacting the lumps position is relatively small. When the dynamic air supply pipe 21 blows air, the high-pressure air flow opens the one-way valve 73 and blows out from the air vent 72. The blown air flow acts on the fan blade 71, causing the upper mounting ring 61 to rotate, and the rotating upper mounting ring 61 drives the stripping cloth 63 to rotate. The filter element 16 is always inscribed on the bulging stripping cloth 63, but the filter element 16 does not rotate, thereby causing the stripping cloth 63 and the filter element 16 to move relative to each other, 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 lumps on the stripping cloth 63.

[0042] Reference Figure 2 and Figure 4, a thermocouple thermometer 81 is arranged 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, and a plurality of electric heating rods 82 are arranged in the cylinder 11. The thermocouple thermometer 81 monitors the temperature of the reaction liquid after the filtration in real time. Since the melting point of 4,4'-bis(α,α-dimethylbenzyl)diphenylamine in the reaction liquid is relatively high and the filtration process is relatively long, if the temperature of the mixed liquid is relatively low during filtration, part of the 4,4'-bis(α,α-dimethylbenzyl)diphenylamine will crystallize, that is, the electric heating rod 82 heats the reaction liquid during the filtration operation to keep the reaction liquid warm. When the staff observes that the temperature displayed by the thermocouple thermometer 81 is lower than the standard range, the electric heating rod 82 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 16, effectively reducing the loss of the product during the filtration process and also reducing the filtration burden of the filter element 16.

[0043] Reference Figure 4 A liquid storage bin 91 is fixedly connected in the detection tube 51 below the suction tube 52, and the temperature measuring end of the thermocouple thermometer 81 is located in the liquid storage bin 91. A plurality of connecting ropes 92 are fixedly connected to one end of the piston 53 away from the electric push rod 54, and the maximum length of the connecting rope 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 rope 92, and 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, and when the elastic rope 95 is in a free state, the valve plate 94 is located in the lifting ring 93 and blocks the lifting ring 93.

[0044] Before the filtration operation, in order to ensure that the detection accuracy of the thermocouple thermometer 81 is within the error range, the staff can drive the piston 53 to rise through the electric push rod 54. During this process, the connecting rope 92 is first stretched, and the lifting ring 93 is immobilized by gravity. At this time, the pressure between the lifting ring 93 and the piston 53 is reduced, and the residual reaction liquid in the liquid storage tank 91 pushes the valve plate 94 to move upward and enter the lifting ring 93. When the connecting rope 92 is stretched to the longest, the upward piston 53 causes the connecting rope 92 to pull the lifting ring 93 to rise until the lifting ring 93 is flush with the liquid permeable tube 55. At this time, the absorbed reaction liquid is discharged from the liquid permeable tube 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 permeable tube 55 until the lifting ring 93 drops to the bottom. The electric push rod 54 pushes the piston 53 to squeeze the ice water, so that the ice water breaks through the valve plate 94 and enters the liquid storage tank 91. At this time, observe and record the data of the thermocouple thermometer 81, and then discharge the ice water and inject boiling water through the above steps, observe and record the data of the thermometer, and finally compare the water temperature with the temperature of the thermometer 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 the present application, the lifting ring 93 is an iron ring. A limiting magnet 96 is fixedly connected 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 the fluid into the liquid storage tank 91 is fixedly connected inside the detection tube 51.

[0046] During the filtering operation, the guide plate 97 guides part of the filtered reaction liquid into the liquid storage tank 91, so that there is always timely filtered reaction liquid in the liquid storage tank 91, avoiding similar results in the random inspection caused by poor circulation of the reaction liquid in the liquid storage tank 91; when the lifting ring 93 drops to the lowest point, the lifting ring 93 is attracted by the limiting magnet 96, and when the suction tube 52 needs to pump liquid, the electric push rod 54 drives the piston 53 to move upward, and the pressure at the upper end of the lifting ring 93 is less than that at the lower end. At this time, the suction 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, keeping the lifting ring 93 stationary while the valve plate 94 rises under pressure, so that the fluid smoothly enters the cavity between the lifting ring 93 and the piston 53, thereby increasing the amount of liquid sucked each time when the piston 53 has the same stroke.

[0047] Reference Figure 2 The lifting parts are several hydraulic cylinders 4 fixedly connected to the inner wall of the cylinder 11. The output end of the hydraulic cylinder 4 is fixedly connected to the water shield 3. When the hydraulic cylinder 4 is extended to the longest, the height of the water shield 3 is higher than the lowest point of the filter element 16. When the hydraulic cylinder 4 is contracted to the shortest, a gap is left between the opening of the water shield 3 and the lowest point of the filter element 16 to facilitate the falling of solid matter. When it is necessary to drive the water shield 3 to descend, it is only necessary to drive the hydraulic cylinder 4 to extend. Conversely, when it is necessary to drive the water shield 3 to descend, it is only necessary to contract the hydraulic cylinder 4. The structure is simple and the operation is easy.

[0048] The implementation principle of the reaction liquid filtering and recovery device for the production of antioxidant KY-405 in the embodiment of the present application is as follows: the reaction liquid enters the cylinder 11 from the liquid inlet pipe 13, and then the reaction liquid is sucked through the filter element 16. Solids such as clay and side reaction products in the reaction liquid passing through the filter element 16 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 grade in the next cylinder 11. Side reaction products in the reaction liquid after filtering are collected on the filter element 16 in turn to prevent the side reaction products from affecting the subsequent reaction liquid processing operations and the purity of the final product.

[0049] When sampling inspection is required for the filtering structure of the corresponding cylinder 11, the piston 53 only needs to be pulled up by the electric push rod 54. During this process, the connecting rope 92 is first stretched, and the lifting ring 93 is immobilized by gravity and the suction force of the limit magnet 96. At this time, the pressure between the lifting ring 93 and the piston 53 decreases, and the reaction liquid in the liquid storage tank 91 pushes the valve plate 94 to move up and enter the lifting ring 93. When the connecting rope 92 is stretched to the longest, the lifting ring 93 and the piston 53 reach the maximum distance, 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 to re-block the hole of the lifting ring 93 until the height of the piston 53 exceeds the liquid permeable tube 55, and the reaction liquid between the piston 53 and the lifting ring 93 gradually flows out from the liquid permeable tube 55, so that the staff can collect and inspect it.

[0050] When cleaning the filter element 16, the hydraulic cylinder 4 is turned on and contracted, at which time the water shield 3 descends, and then a clean high-pressure airflow is blown out through the air supply pipe 21. The airflow enters the filter element 16 and is blown out to blow out the solid matter such as the clay and side reaction products adhering to the filter element 16. The solid matter dropped from the filter element 16 falls on the water shield 3. During this process, the high-pressure airflow will also blow open the one-way valve 73 and blow out from the air vent 72. The blown airflow acts on the fan blades 71 to rotate the upper mounting ring 61. The rotating upper mounting ring 61 drives the stripping cloth 63 to rotate. The filter element 16 is always inscribed on the bulging stripping cloth 63, and because the filter element 16 does not rotate, the stripping cloth 63 and the tangent part of the filter element 16 move relative to each other, 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 lumps on the stripping cloth 63, and also fall on the water shield 3, and fall into the discharge pipe 22 from the opening of the water shield 3, and then open the valve and nozzle 231 of the discharge pipe 22, so that the solid matter falls into the collection bucket 23, and is moistened by the water mist sprayed by the nozzle 231 to prevent the solid matter from flying around;

[0051] When the accuracy of the thermocouple thermometer 81 needs to be tested before the filtering operation, the lifting ring 93 is first raised to extract the residual reaction liquid in the lifting ring 93, and then 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 permeable tube 55 until the lifting ring 93 drops to the bottom. The electric push rod 54 pushes the piston 53 to squeeze the ice water, so that the ice water breaks through the valve plate 94 and enters the liquid storage tank 91. At this time, the data of the thermocouple thermometer 81 is observed and recorded, and then the ice water is discharged and boiling water is injected through the above steps, and the data of the thermometer is observed and recorded. Finally, the water temperature is compared with the temperature of the thermometer to roughly calculate whether the display of the thermocouple thermometer 81 is within the error range.

[0052] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A reaction liquid filtering and recovery device for the production of antioxidant KY-405, characterized in that: The invention comprises a plurality of cylinders (11), a cover (12) being detachably provided on the cylinder (11), a liquid inlet pipe (13) being connected below the peripheral wall of the cylinder (11), a liquid outlet pipe (14) being connected to the cover (12), a partition plate (15) being provided at one end of the cylinder (11) close to the cover (12), a plurality of filter elements (16) being provided on the partition plate (15) in the cylinder (11), the cylinders (11) being connected to each other in series, and adjacent cylinders (11) being connected to each other in series. The filtering levels of the filter elements (16) between the two parts are gradually increased; the cover body (12) is connected with an air supply pipe (21) above, the cylinder body (11) is connected with a discharge pipe (22) with a valve below, a collection barrel (23) is provided below the cylinder body (11) in a lifting manner, the discharge pipe (22) is inserted into the collection barrel (23), and the outer wall of the discharge pipe (22) is in contact with the inner wall of the barrel mouth of the collection barrel (23); the collection barrel (23) is connected with a nozzle (231) connected to a water source; A water shield (3) is slidably raised and lowered in the cylinder (11); the filter element (16) passes through the water shield (3); the water shield (3) is lower near the filter element (16) and higher around; a lifting member for raising and lowering the water shield (3) is provided on the cylinder (11); The liquid outlet pipe (14) is connected to a detection pipe (51), the detection pipe (51) is connected to a suction pipe (52), a piston (53) is slidably connected in the suction pipe (52), an electric push rod (54) is fixedly connected to one end of the suction pipe (52) away from the detection pipe (51), the end of the electric push rod (54) is fixedly connected to the piston (53), and a liquid permeable pipe (55) is provided on the suction pipe (52); An upper mounting ring (61) is provided at one end of the partition plate (15) away from the cover body (12), and a lower mounting ring (62) is provided at one end of the water shield (3) close to the partition plate (15), a stripping cloth (63) sleeved on the surface of the filter element (16) is fixedly connected between the upper mounting ring (61) and the lower mounting ring (62), 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 (62) when the water shield (3) moves to the lowest position; 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 shield (3), and the rotation axes of the upper mounting ring (61) and the lower mounting ring (62) are colinear, and the rotation axes of the upper mounting ring (61) and the lower mounting ring (62) are not colinear with the axis of the filter element (16), and the filter element (16) is inscribed in the upper mounting ring (61). When the stripping cloth (63) is in a free state, the stripping cloth (63) part at the tangent between the filter element (16) and the upper mounting ring (61) is in contact with the filter element (16), and the upper mounting ring (61) is provided with a power part for driving the upper mounting ring (61) to rotate.

2. The reaction liquid filtering and recovery device for producing an antioxidant KY-405 according to claim 1, characterized in that: The power component is a plurality of fan blades (71) fixedly connected to the outer peripheral wall of the upper mounting ring (61); the partition plate (15) is provided with air holes (72) at positions corresponding to the fan blades (71); the partition plate (15) is provided with a one-way valve (73) at the air hole (72); and the one-way valve (73) only allows fluid to flow from the upper side of the partition plate (15) to the lower side of the partition plate (15).

3. The reaction liquid filtering and recovery device for producing an antioxidant KY-405 according to claim 1, characterized in that: A thermocouple thermometer (81) is arranged on the detection tube (51), a display end of the thermocouple thermometer (81) is located outside the detection tube (51), and a measuring end is located inside the detection tube (51), and a plurality of electric heating rods (82) are arranged inside the cylinder (11).

4. The reaction liquid filtering and recovery device for producing antioxidant KY-405 according to claim 3, characterized in that: A liquid storage bin (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 bin (91); one end of the piston (53) away from the electric push rod (54) is fixedly connected to a plurality of connecting ropes (92); the maximum length of the connecting ropes (92) is less than the maximum travel of the piston (53); the other end of the connecting ropes (92) is fixedly connected to a lifting ring (93); a valve plate (94) is provided on the inner circumferential 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); 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 recovery device for producing antioxidant KY-405 according to claim 4, characterized in that: The lifting ring (93) is ferromagnetic, and the outer peripheral wall of the detection tube (51) is fixedly connected to a limiting magnet (96), and the limiting magnet (96) and the lifting ring (93) attract each other.

6. The reaction liquid filtering and recovery device for producing antioxidant KY-405 according to claim 5, characterized in that: A guide plate (97) for guiding the fluid into the liquid storage bin (91) is fixedly connected inside the detection tube (51).

7. The reaction liquid filtering and recovery device for producing antioxidant KY-405 according to claim 1, characterized in that: The lifting components are a plurality of hydraulic cylinders (4) fixedly connected to the inner wall of the cylinder (11); the output end of the hydraulic cylinder (4) is fixedly connected to the water shield (3); when the hydraulic cylinder (4) is extended to its longest length, the height of the water shield (3) is higher than the lowest point of the filter element (16); when the hydraulic cylinder (4) is contracted to its shortest length, a gap is left between the opening of the water shield (3) and the lowest point of the filter element (16).

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