Online pulsed ultrasonic based vinyl chloride monomer filter cleaning apparatus

Abstract

The utility model relates to vinyl chloride monomer filter technical field, concretely for the online pulse ultrasonic based vinyl chloride monomer filter cleaning device, including monomer filter, impurity collection jar and delivery pump, the lower end of impurity collection jar is detachably connected with jar body outlet pipe, the outer surface of jar body outlet pipe is provided with jar body outlet valve, the other end of jar body outlet pipe is detachably connected with pump inlet valve, the other end of pump inlet valve is detachably connected with T type filter, and the output of T type filter is detachably connected with the input of delivery pump. The online pulse ultrasonic based vinyl chloride monomer filter cleaning device can filter the medium discharged from the impurity collection jar again, efficiently intercepts the solid impurities stripped by cleaning, protects the rectifying column packing, pump valve, heat exchanger and other equipment from being blocked and worn, guarantees the rectification purity of vinyl chloride monomer, and further improves the stability and production safety of the device operation.

Description

Technical Field

[0001] This utility model relates to the field of vinyl chloride monomer filter technology, specifically to a vinyl chloride monomer filter cleaning device based on online pulsed ultrasonic waves. Background Technology

[0002] Vinyl chloride, also known as vinyl chloride monomer (VCM), is one of the most important chemical products in the world, alongside ethylene and sodium hydroxide. It is a crucial raw material for the plastics industry and an important organic chemical product in my country. Vinyl chloride monomer filters are key process equipment, serving four main functions: First, they remove solid impurities such as dust, catalyst residue, and metal fragments carried by the raw materials through high-precision filter media (typically 1-10 μm filtration accuracy), preventing impurities from forming deposits that affect heat transfer in the reaction, damage PVC resin quality, and wear down downstream pump and valve seals. Second, they utilize hydrophobic filter media or gas-liquid separation structures... The system has several functions: First, it intercepts liquid impurities such as residual process water and high-boiling-point organic byproducts, preventing water from disrupting the emulsion balance of the polymerization reaction and causing "explosive polymerization," and organic impurities from interfering with the growth of PVC molecular chains. Second, it acts as a pre-protective barrier, preventing impurities from clogging the feed nozzles of the polymerization reactor, creating reaction "hot spots," and wearing down the stirring seals, thus protecting core equipment such as the polymerization reactor and extending their service life. Third, it assists in process safety, preventing impurities from causing pipeline blockage and pressure increases, catalyzing the decomposition of VCM to produce corrosive gases, and some filters with differential pressure monitoring can even remind you to replace the filter media, ensuring the stable operation of the flammable, explosive, and toxic VCM system.

[0003] However, existing technologies have the following problems in practical use; After the existing equipment completes the cleaning operation of vinyl chloride monomer, the stripped impurities can easily flow into the subsequent distillation process with the medium. Impurities that are not sufficiently intercepted will not only clog the distillation column packing, interfere with the gas-liquid mass transfer efficiency, and affect the distillation purity of vinyl chloride monomer, but will also wash over the pumps, valves, heat exchangers and other equipment in the distillation system with the medium, aggravating wear, leading to increased equipment failure risk and maintenance costs, and restricting the overall operational stability of the unit. Utility Model Content

[0004] (a) Technical problems to be solved To overcome the aforementioned deficiencies in the prior art, this utility model provides a vinyl chloride monomer filter cleaning device based on online pulsed ultrasound. This solves the problem mentioned in the background art that after the existing equipment completes the cleaning operation of vinyl chloride monomer, the stripped impurities easily flow into the subsequent distillation process with the medium. The impurities that are not sufficiently intercepted not only clog the distillation column packing, interfere with the gas-liquid mass transfer efficiency, and affect the distillation purity of vinyl chloride monomer, but also wash over the pumps, valves, heat exchangers and other equipment in the distillation system with the medium, aggravating wear, leading to increased equipment failure risk and maintenance costs, and restricting the overall operational stability of the device.

[0005] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: a vinyl chloride monomer filter cleaning device based on online pulsed ultrasound, comprising a monomer filter, an impurity collection tank, and a delivery pump. The lower end of the impurity collection tank is detachably connected to a tank outlet pipe. An outlet valve is provided on the outer surface of the outlet pipe. The other end of the outlet pipe is detachably connected to a pump inlet valve. A T-type filter is detachably connected to the other end of the pump inlet valve. The output end of the T-type filter is detachably connected to the input end of the delivery pump. A transmission pipe is connected to the output end flange of the delivery pump. A pressure gauge valve is detachably connected to the outer surface of the transmission pipe. A pressure gauge is detachably connected to the upper end of the pressure gauge valve. A check valve and a pump outlet valve are sequentially arranged from left to right on the outer surface of the transmission pipe near the pressure gauge valve.

[0006] Preferably, a transducer is detachably connected to the outer surface of the individual filter, and an ultrasonic transmitter is provided on the other side of the transducer. A fourth control valve is provided at the upper end of the individual filter, and a conveying pipe is detachably connected to the other end of the fourth control valve. A feed pipe is detachably connected to the other end of the conveying pipe. A controller is provided on the outer surface of the conveying pipe near the feed pipe. One end of the feed pipe is detachably connected to the outer surface of the individual filter. From left to right, a feed valve, a third control valve, and an inlet pressure gauge root valve are arranged sequentially on the outer surface of the feed pipe. An inlet pressure gauge is detachably connected to the upper end of the inlet pressure gauge root valve.

[0007] Preferably, the lower end of the individual filter is detachably connected to a second control valve, the other end of the second control valve is flanged to a feed pipe, and the other end of the feed pipe is detachably connected to the upper end of the impurity collection tank.

[0008] Preferably, an outlet pipe is provided on the outer surface of the individual filter near the transducer, an outlet pressure gauge root valve is provided on the outer surface of the outlet pipe, an outlet pressure gauge is detachably connected to the upper end of the outlet pressure gauge root valve, and a first control valve is provided on the outer surface of the outlet pipe near the outlet pressure gauge root valve.

[0009] Preferably, a thermometer and a gauge valve are arranged sequentially from right to left on the upper end of the impurity collection tank near the feeding pipe, and a tank pressure gauge is arranged on the upper end of the gauge valve.

[0010] Preferably, one end of the impurity collection tank is provided with a return water pipe, and the outer surface of the return water pipe is provided with a return water valve. The side of the impurity collection tank near the return water valve is provided with a water inlet pipe, and the outer surface of the water inlet pipe is provided with a water inlet valve. The other end of the impurity collection tank is detachably connected to a U-shaped liquid level pipe. A liquid level gauge is provided in the middle of the outer surface of the U-shaped liquid level pipe, and a first liquid level gauge valve and a second liquid level gauge valve are respectively provided on the left and right sides of the liquid level gauge.

[0011] Preferably, a first sampling tube is provided on the side of the outer surface of the feeding tube away from the second control valve, and a sealed sampler is detachably connected to the other end of the first sampling tube. A second sampling tube is provided on the other side of the sealed sampler, and the other end of the second sampling tube is detachably connected to the outer surface of the transmission tube.

[0012] Preferably, the lower end of the individual filter is detachably connected to a support frame.

[0013] (III) Beneficial Effects This invention provides a vinyl chloride monomer filter cleaning device based on online pulsed ultrasonic waves, which has the following beneficial effects: This online pulsed ultrasonic filter cleaning device for vinyl chloride monomer, through the coordinated arrangement of the tank outlet pipe, T-type filter, and transfer pump, can re-filter the medium discharged from the impurity collection tank during operation. It efficiently intercepts and removes solid impurities, and the purified medium is then stably transported by the transfer pump to the subsequent distillation process. This effectively avoids the risk of impurities entering the distillation system with the medium at the source, protecting the distillation column packing, pumps, valves, heat exchangers, and other equipment from clogging and wear, while also ensuring the purity of the vinyl chloride monomer during distillation. This further improves the stability and safety of the unit's operation. The pressure gauge valve controls the connection between the pressure gauge and the transmission pipe. It opens when pressure monitoring is needed, allowing the pressure gauge to sense the pressure inside the pipe. It closes when maintenance is needed or monitoring is not required, protecting the pressure gauge from damage caused by media impact. The pressure gauge monitors the media pressure in the transmission pipe in real time, reflecting the working status of the delivery pump and whether the T-type filter and pipeline are blocked through the pressure value. At the same time, the check valve installed on the transmission pipe can use its unidirectional conduction characteristic to prevent the media from flowing back due to downstream pressure fluctuations, avoiding backflow of media impacting the delivery pump impeller and causing reverse rotation damage, while ensuring the uniqueness of the media delivery direction. Attached Figure Description

[0014] Figure 1 This invention presents a schematic diagram of a device and method for cleaning vinyl chloride monomer filters based on online pulsed ultrasound. Figure 2 This invention proposes a cleaning device and method for vinyl chloride monomer filters based on online pulsed ultrasound. (Schematic diagram of the monomer filter structure is shown.) Figure 3 This invention presents a schematic diagram of the impurity collection tank structure of a vinyl chloride monomer filter cleaning device and method based on online pulsed ultrasound. Figure 4 The present invention provides a schematic diagram of the pump structure for a vinyl chloride monomer filter cleaning device and method based on online pulsed ultrasound.

[0015] In the diagram: 1. Individual filter; 2. Impurity collection tank; 3. Transfer pump; 4. Transducer; 5. Ultrasonic transmitter; 6. Fourth control valve; 7. Delivery pipe; 8. Inlet pipe; 9. Controller; 10. Inlet valve; 11. Third control valve; 12. Inlet pressure gauge root valve; 13. Inlet pressure gauge; 14. Second control valve; 15. Feed pipe; 16. Outlet pipe; 17. Outlet pressure gauge root valve; 18. First control valve; 19. Thermometer; 20. Gauge root valve; 21. Tank pressure gauge; 22. Return water pipe ; 23. Return water valve; 24. Water inlet pipe; 25. Water inlet valve; 26. U-shaped level pipe; 27. Level gauge; 28. First level gauge valve; 29. ​​Second level gauge valve; 30. Tank outlet pipe; 31. Tank outlet valve; 32. Pump inlet valve; 33. T-type filter; 34. Transmission pipe; 35. Pressure gauge valve; 36. Detection pressure gauge; 37. Check valve; 38. Pump outlet valve; 39. First sampling pipe; 40. Sealed sampler; 41. Second sampling pipe; 42. Support frame; 43. Outlet pressure gauge. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0017] Example 1: Please refer to Figure 1 and Figure 2This utility model provides a technical solution: a vinyl chloride monomer filter cleaning device based on online pulsed ultrasound, including a monomer filter 1, an impurity collection tank 2, and a delivery pump 3. A transducer 4 is detachably connected to the outer surface of the monomer filter 1, and an ultrasonic transmitter 5 is provided on the other side of the transducer 4. An outlet pipe 16 is provided on the outer surface of the monomer filter 1 near the transducer 4. An outlet pressure gauge root valve 17 is provided on the outer surface of the outlet pipe 16. An outlet pressure gauge 43 is detachably connected to the upper end of the outlet pressure gauge root valve 17. A first control valve 18 is provided on the outer surface of the outlet pipe 16 near the outlet pressure gauge root valve 17. A fourth control valve 6 is provided at the upper end of the monomer filter 1. A delivery pipe 7 is detachably connected to the other end of the fourth control valve 6, and a feed pipe is detachably connected to the other end of the delivery pipe 7. 8. A controller 9 is provided on the outer surface of the conveying pipe 7 near the side of the feed pipe 8. One end of the feed pipe 8 is detachably connected to the outer surface of the unit filter 1. From left to right, the outer surface of the feed pipe 8 is provided with a feed valve 10, a third control valve 11 and an inlet pressure gauge root valve 12. The upper end of the inlet pressure gauge root valve 12 is detachably connected to an inlet pressure gauge 13. The lower end of the unit filter 1 is detachably connected to a second control valve 14. The other end of the second control valve 14 is flanged to a feed pipe 15. The other end of the feed pipe 15 is detachably connected to the upper end of the impurity collection tank 2. From right to left, the upper end of the impurity collection tank 2 near the side of the feed pipe 15 is provided with a thermometer 19 and a gauge root valve 20. The upper end of the gauge root valve 20 is provided with a tank pressure gauge 21. The lower end of the unit filter 1 is detachably connected to a support frame 42. Through the above technical solution, the coordinated setup of the monomer filter 1, transducer 4, and ultrasonic transmitter 5 allows the pulsed ultrasonic cavitation effect and mechanical vibration effect generated by the ultrasonic transmitter 5 to effectively remove various impurities from the surface and interior of the monomer filter 1, resulting in a more thorough cleaning. Compared with traditional cleaning methods, the impurity removal rate is greatly improved, and the filtration efficiency and service life of the monomer filter 1 are also enhanced. Furthermore, compared to chemical cleaning, which relies on corrosive agents and easily causes filter material deterioration and seal aging, and mechanical cleaning, which easily causes filter wear and pore deformation, pulsed ultrasonic cleaning is a purely physical, non-contact operation that does not directly contact the filter element throughout the process. This completely avoids the risks of corrosion, scratches, and structural damage, further extending the service life of the filter element and significantly reducing the frequency of equipment maintenance and the material and labor costs of filter element replacement. It also reduces the use and emission of chemical agents, lowering environmental pollution. Additionally, the coordinated setup of transducer 4 and ultrasonic transmitter 5 allows for online cleaning of the vinyl chloride monomer production system without interrupting production, avoiding production losses caused by shutdown cleaning, improving production efficiency, and reducing the impact of production interruptions on the entire production process. Furthermore, the conveying pipe 7 connects the fourth control valve 6 and the feed pipe 8, serving as the external cleaning fluid delivery channel and providing a mounting platform for the controller 9. This achieves the dual functions of cleaning fluid delivery and equipment integration. The fourth control valve 6 controls the shut-off of the conveying pipe 7; it opens during cleaning operations to connect the conveying pipe 7 to the monomer filter 1. The controller 9 sets and adjusts the operating parameters of the ultrasonic transmitter 5. The feed valve 10 is the main control valve for the fresh vinyl chloride monomer feed; it opens during production to supply monomers or closes to cut off the feed, achieving basic on / off control of the feed. Simultaneously, the third control valve 11 assists in regulating the flow rate and pressure of the fresh vinyl chloride monomer in the feed pipe 8, working in conjunction with the feed valve 10 to achieve precise feed control and prevent flow fluctuations from affecting the filtration effect. The inlet pressure gauge root valve 12 is the matching valve for the inlet pressure gauge 13; when opened, it... The inlet pressure gauge 13 is connected to the feed pipe 8 for pressure monitoring. When closed, the inlet pressure gauge 13 can be inspected or replaced, while isolating the medium to ensure operational safety. The outlet pipe 16 can transport the filtered qualified vinyl chloride monomer to subsequent polymerization reactors and other processes. The outlet pressure gauge root valve 17 at the upper end of the outlet pipe 16 is a matching valve for the outlet pressure gauge 43. When opened, it connects the outlet pressure gauge 43 to the outlet pipe 16 to monitor the pressure of the filtered monomer. When closed, it can be inspected or replaced, and the medium can be isolated to ensure operational safety. At the same time, the first control valve 18 is located on the side of the outlet pipe 16 near the outlet pressure gauge root valve 17. It is opened during production to transport qualified monomer and closed during cleaning to cut off the passage between the outlet pipe 16 and subsequent production processes, preventing impurities or media from entering the external polymerization reactor during cleaning and ensuring the safety of the production system. In addition, during the cleaning process, the second control valve 14 is opened, allowing the impurities stripped from the individual filter 1 to flow into the impurity collection tank 2 along with the cleaning fluid through the feed pipe 15. After cleaning, the valve is closed to cut off the passage between the individual filter 1 and the impurity collection tank 2. At the same time, the thermometer 19 at the top of the impurity collection tank 2 can monitor the temperature of the cleaning fluid containing impurities in the tank in real time, avoiding abnormal temperature from affecting the stability of the medium or the effect of subsequent distillation treatment, and providing data for monitoring the state of the medium in the tank. The root valve 20 is a matching valve for the tank pressure gauge 21. When it is opened, it connects the tank pressure gauge 21 to the inside of the tank to realize pressure monitoring. When it is closed, the tank pressure gauge 21 can be repaired or replaced, and the medium is isolated to ensure operational safety.

[0018] Please see Figure 1 and Figure 3One end of the impurity collection tank 2 is provided with a return water pipe 22, and a return water valve 23 is provided on the outer surface of the return water pipe 22. A water inlet pipe 24 is provided on the side of the impurity collection tank 2 near the return water valve 23, and a water inlet valve 25 is provided on the outer surface of the water inlet pipe 24. The other end of the impurity collection tank 2 is detachably connected to a U-shaped liquid level pipe 26. A liquid level gauge 27 is provided in the middle of the outer surface of the U-shaped liquid level pipe 26, and a first liquid level gauge valve 28 and a second liquid level gauge valve 29 are provided on the left and right sides of the liquid level gauge 27, respectively. The lower end of the impurity collection tank 2 is detachably connected to a tank outlet pipe 30, and a tank outlet valve 31 is provided on the outer surface of the tank outlet pipe 30. The other end of the tank outlet pipe 30 is detachably connected to a pump inlet valve 32, and the other end of the pump inlet valve 32 is detachably connected to a T-type filter 33. The output end of the T-type filter 33 is detachably connected to the input end of the delivery pump 3. The return water pipe 22 serves as the cleaning channel for the impurity collection tank 2, used to discharge wastewater or residual waste liquid after cleaning, ensuring the cleanliness of the tank and preparing for the next impurity collection. During cleaning, the return water valve 23 is closed, controlling the opening and closing of the return water pipe 22. It opens during cleaning of the impurity collection tank 2 to discharge wastewater and closes during normal impurity collection to prevent leakage of the tank's internal media, achieving precise control of the return water pipe 22. The supply water pipe 24 injects cleaning fluid into the impurity collection tank 2 to clean residual impurities or sediment, ensuring cleanliness and preventing contamination of the subsequently collected media by residual impurities. The supply water valve 25 controls the opening and closing of the supply water pipe 24. It opens during cleaning of the impurity collection tank 2 to inject cleaning water and closes during normal impurity collection to prevent leakage of the tank's internal media or the entry of external contaminants, achieving on / off control of the supply water pipe 24. The U-shaped level pipe 26 provides an installation and monitoring platform for the level gauge 27. The level gauge 27 monitors the liquid level in the impurity collection tank 2 in real time by measuring the liquid level in the U-shaped level tube 26. This prevents the liquid level from being too high and causing the liquid to overflow, or from being too low and affecting the pumping of the transfer pump 3. The first level gauge valve 28 and the second level gauge valve 29, when open, connect the U-shaped level tube 26 to the impurity collection tank 2 to ensure accurate level monitoring. When closed, the level gauge 27 can be repaired or replaced. The tank outlet pipe 30 is connected to the lower end of the impurity collection tank 2 and is the initial channel for the impurity-containing medium in the tank to flow to the transfer pump 3, providing a path for the medium to transfer from inside the tank to the outside. At the same time, the tank outlet valve 31 can control the opening and closing of the tank outlet pipe 30. The pump inlet valve 32 is installed between the tank outlet pipe 30 and the T-type filter 33 to control the passage of the medium into the transfer pump 3. It is opened during transportation to ensure that the medium flows to the T-type filter 33. It is closed when the transfer pump 3 or the T-type filter 33 is being repaired to cut off the flow of the medium.

[0019] Example 2: Please refer to Figure 1 and Figure 4This utility model provides a technical solution based on Embodiment 1. The output end flange of the conveying pump 3 is connected to a transmission pipe 34. The outer surface of the transmission pipe 34 is detachably connected to a pressure gauge valve 35. The upper end of the pressure gauge valve 35 is detachably connected to a detection pressure gauge 36. From left to right, a check valve 37 and a pump outlet valve 38 are arranged sequentially on the outer surface of the transmission pipe 34 near the pressure gauge valve 35. A first sampling pipe 39 is arranged on the outer surface of the feeding pipe 15 away from the second control valve 14. The other end of the first sampling pipe 39 is detachably connected to a sealed sampler 40. The other side of the sealed sampler 40 is provided with a second sampling pipe 41. The other end of the second sampling pipe 41 is detachably connected to the outer surface of the transmission pipe 34. Through the above technical solution, the transmission pipe 34 is connected to the output end of the transfer pump 3, serving as a transmission channel for the medium containing impurities after being pressurized by the transfer pump 3, transporting the medium to the subsequent distillation process. Simultaneously, the pressure gauge valve 35 is a matching valve for the pressure gauge 36. When open, it connects the pressure gauge 36 to the transmission pipe 34 to monitor the output pressure of the transfer pump 3. When closed, it allows for the maintenance or replacement of the pressure gauge 36, while also isolating the medium to ensure operational safety. Furthermore, during use, the check valve 37 prevents backflow of the medium within the transmission pipe 34, avoiding backflow of the medium into the transfer pump 3 or the impurity collection tank 2, ensuring the unidirectional transport of the medium. The pump outlet valve 38 controls the output path of the transmission pipe 34, transporting the medium to the distillation process. The system is activated sequentially and deactivated when conveying is stopped or during maintenance, disconnecting the transmission pipe 34 from subsequent processes. At this time, the first sampling pipe 39 is installed on the side of the feed pipe 15 away from the second control valve 14, serving as the sampling channel for cleaning effect testing. It introduces the impurity-containing medium in the feed pipe 15 into the sealed sampler 40, providing a medium source for sampling and testing, and ensuring the acquisition of samples for cleaning effect verification. The second sampling pipe 41 connects the sealed sampler 40 and the transmission pipe 34, allowing the medium pumped out by the conveying pump 3 to be introduced into the interior of the sealed sampler 40. Through the setup of the first sampling pipe 39 and the second sampling pipe 41, samples can be taken from the medium in different processes, and the test results can be monitored in real time to ensure that the impurity content is below the standard value of 8 ppm.

[0020] All electrical components mentioned in this article are connected to an external main controller and 220V AC mains power via standard interfaces. The main controller can be any commercially available known device. There are no special restrictions on the specific models of the electrical components; any commercially available ordinary products can be selected, as long as they meet the usage requirements of this utility model.

[0021] In this invention, the working steps of the device are as follows: First, open the inlet valve 10 and the third control valve 11. Fresh vinyl chloride monomer enters the monomer filter 1 through the inlet pipe 8. The feed flow and pressure are regulated by the third control valve 11 to ensure stable feed and avoid flow fluctuations affecting the filtration effect. At the same time, close the second control valve 14, the tank outlet valve 31, the pump inlet valve 32, and the pump outlet valve 38 to cut off the cleaning and impurity conveying path. The monomer filter 1 removes solid and liquid impurities from the raw material through high-precision filter media. The filtered qualified vinyl chloride monomer is then transported to the subsequent polymerization reactor and other processes through the outlet pipe 16. When the pressure difference monitored by the inlet pressure gauge 13 and the outlet pressure gauge 43 reaches ≥8 kPa... At time a, it is determined that the filter element of monomer filter 1 has serious impurity accumulation, and the cleaning procedure needs to be initiated. The first control valve 18 is closed to cut off the qualified monomer output path, preventing impurities or media from entering subsequent production processes during cleaning. The third control valve 11 is closed to suspend the feeding of fresh vinyl chloride monomer. The second control valve 14 is opened to establish a connection between monomer filter 1 and impurity collection tank 2. The fourth control valve 6 is opened, and external cleaning fluid enters the interior of monomer filter 1 through delivery pipe 7 and feed pipe 8. The flushing flow rate is adjusted to 5 m³ / h via controller 9, and the flushing time is set to 30 minutes. The ultrasonic transmitter 5 is activated via controller 9, and the transducer 4 converts the electrical signal... The cleaning process is then replaced with pulsed ultrasonic waves, which act inside the individual filter 1. Utilizing the cavitation and mechanical vibration effects of the ultrasonic waves, impurities adhering to the surface and interior of the filter element are removed. The removed impurities flow with the cleaning fluid through the second control valve 14 and the feed pipe 15 into the impurity collection tank 2 for centralized collection. During this process, the liquid level in the tank is monitored by the level gauge 27 to prevent overflow due to excessively high levels. Simultaneously, after cleaning is completed, the fourth control valve 6, the ultrasonic transmitter 5, and the second control valve 14 are closed to stop the supply of cleaning fluid and the ultrasonic action. The tank outlet valve 31, the pump inlet valve 32, and the pump outlet valve 38 are opened to establish a pathway from the impurity collection tank 2 to subsequent processes. The transfer pump 3 is then started, and the impurity collection tank... The impurity-laden medium in tank 2 flows out through tank outlet pipe 30 and first passes through T-type filter 33 for secondary filtration to intercept large particles of impurities, thus protecting the transfer pump 3 and downstream equipment. The filtered medium is then pressurized and transported to the distillation process through transfer pipe 34. Pressure gauge valve 35 is opened, and pressure gauge 36 is used to monitor the pressure inside transfer pipe 34 to determine the operating status of transfer pump 3 and the smoothness of the pipeline. Check valve 37 prevents backflow of the medium and ensures unidirectional stability of the conveying direction. The medium inside feed pipe 15 is extracted through first sampling pipe 39, and the medium inside transfer pipe 34 is extracted through second sampling pipe 41. Both are introduced into closed sampler 40 for testing to ensure that the impurity content is below the standard value of 8 ppm.

[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A vinyl chloride monomer filter cleaning device based on online pulsed ultrasonic waves, comprising a monomer filter (1), an impurity collection tank (2), and a transfer pump (3), characterized in that: The lower end of the impurity collection tank (2) is detachably connected to a tank outlet pipe (30). The outer surface of the tank outlet pipe (30) is provided with a tank outlet valve (31). The other end of the tank outlet pipe (30) is detachably connected to a pump inlet valve (32). The other end of the pump inlet valve (32) is detachably connected to a T-type filter (33). The output end of the T-type filter (33) is detachably connected to the input end of the delivery pump (3). The output end flange of the delivery pump (3) is connected to a transmission pipe (34). The outer surface of the transmission pipe (34) is detachably connected to a pressure gauge valve (35). The upper end of the pressure gauge valve (35) is detachably connected to a detection pressure gauge (36). The outer surface of the transmission pipe (34) near the pressure gauge valve (35) is provided with a check valve (37) and a pump outlet valve (38) from left to right.

2. The vinyl chloride monomer filter cleaning device based on online pulsed ultrasound according to claim 1, characterized in that: A transducer (4) is detachably connected to the outer surface of the unit filter (1). An ultrasonic transmitter (5) is provided on the other side of the transducer (4). A fourth control valve (6) is provided at the upper end of the unit filter (1). A conveying pipe (7) is detachably connected to the other end of the fourth control valve (6). A feed pipe (8) is detachably connected to the other end of the conveying pipe (7). A controller (9) is provided on the outer surface of the conveying pipe (7) near the feed pipe (8). One end of the feed pipe (8) is detachably connected to the outer surface of the unit filter (1). A feed valve (10), a third control valve (11), and an inlet pressure gauge root valve (12) are arranged sequentially from left to right on the outer surface of the feed pipe (8). An inlet pressure gauge (13) is detachably connected to the upper end of the inlet pressure gauge root valve (12).

3. The vinyl chloride monomer filter cleaning device based on online pulsed ultrasound according to claim 1, characterized in that: The lower end of the unit filter (1) is detachably connected to a second control valve (14), and the other end of the second control valve (14) is flanged to a feed pipe (15). The other end of the feed pipe (15) is detachably connected to the upper end of the impurity collection tank (2).

4. The vinyl chloride monomer filter cleaning device based on online pulsed ultrasound according to claim 1, characterized in that: An outlet pipe (16) is provided on the outer surface of the unit filter (1) near the transducer (4). An outlet pressure gauge root valve (17) is provided on the outer surface of the outlet pipe (16). An outlet pressure gauge (43) is detachably connected to the upper end of the outlet pressure gauge root valve (17). A first control valve (18) is provided on the outer surface of the outlet pipe (16) near the outlet pressure gauge root valve (17).

5. The vinyl chloride monomer filter cleaning device based on online pulsed ultrasound according to claim 1, characterized in that: The impurity collection tank (2) is provided with a thermometer (19) and a gauge valve (20) from right to left on the side of the upper end near the feed pipe (15). A tank pressure gauge (21) is provided on the upper end of the gauge valve (20).

6. The vinyl chloride monomer filter cleaning device based on online pulsed ultrasound according to claim 1, characterized in that: One end of the impurity collection tank (2) is provided with a return water pipe (22), and the outer surface of the return water pipe (22) is provided with a return water valve (23). The side of the impurity collection tank (2) near the return water valve (23) is provided with a water inlet pipe (24), and the outer surface of the water inlet pipe (24) is provided with a water inlet valve (25). The other end of the impurity collection tank (2) is detachably connected to a U-shaped liquid level pipe (26). A liquid level gauge (27) is provided in the middle of the outer surface of the U-shaped liquid level pipe (26), and a first liquid level gauge valve (28) and a second liquid level gauge valve (29) are respectively provided on the left and right sides of the liquid level gauge (27).

7. The vinyl chloride monomer filter cleaning device based on online pulsed ultrasound according to claim 3, characterized in that: A first sampling tube (39) is provided on the side of the outer surface of the feeding tube (15) away from the second control valve (14). The other end of the first sampling tube (39) is detachably connected to a sealed sampler (40). A second sampling tube (41) is provided on the other side of the sealed sampler (40). The other end of the second sampling tube (41) is detachably connected to the outer surface of the transmission tube (34).

8. The vinyl chloride monomer filter cleaning device based on online pulsed ultrasound according to claim 1, characterized in that: The lower end of the individual filter (1) is detachably connected to a support frame (42).

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