A plasma water washing device for POU exhaust gas treatment

Abstract

This invention relates to the field of POU exhaust gas treatment technology and discloses a plasma water washing device for POU exhaust gas treatment, including a housing. A water tank is fixed to the bottom inner wall of the housing by bolts. A connecting pipe is fixed to the top of the water tank by bolts. A water washing pipe is welded to one side of the connecting pipe. A liquid supply pipe is welded to the top of the water washing pipe. An ionization pipe is welded to the top of the liquid supply pipe. An air inlet pipe and a plasma nozzle are provided at the top of the ionization pipe, which are connected to an external POU exhaust gas pipe. This invention effectively avoids the problem of particulate matter clogging the exhaust port of the air pipe, prevents abnormal rise in internal air pressure, and ensures continuous and efficient operation of exhaust gas treatment through the cooperation of multiple components. At the same time, through the blocking and delaying effect of the filter cloth, highly active particles have more reaction time before entering the water washing stage, reducing the possibility of side reactions with water to generate new pollutants, which not only improves the exhaust gas purification effect but also reduces the difficulty of subsequent water treatment.

Description

Technical Field

[0001] This invention relates to the field of POU tail gas treatment technology, specifically to a plasma water washing device for POU tail gas treatment. Background Technology

[0002] POU exhaust gas treatment is a refined and source-oriented "flue gas treatment" for special process waste gases. It is essentially a professional branch of the broader category of flue gas treatment, generally referring to the key technologies for on-site and efficient purification of toxic and harmful waste gases generated by production processes in industries such as semiconductors. It is usually installed near process equipment, and common treatment methods include thermal treatment (high-temperature oxidation), wet treatment (spray washing), dry adsorption, catalytic oxidation, or a combination of these processes.

[0003] Currently, another type of POU exhaust gas treatment on the market uses plasma water washing, which is to deeply purify exhaust gas through the synergistic effect of plasma and water. Plasma can generate a large number of highly active particles, which can quickly oxidize and decompose organic pollutants and odor substances in exhaust gas. At the same time, the water washing process can effectively absorb dust, acidic gases and some soluble pollutants in exhaust gas, achieving a dual purification effect of physical absorption and chemical oxidation.

[0004] However, during plasma ionization, acidic gases are easily converted into salt particles. If these particles directly enter the vent pipe, they can easily clog the exhaust port, leading to increased internal pressure, affecting exhaust gas treatment efficiency, and even posing safety hazards. In addition, traditional plasma water washing equipment often uses a series connection between the water washing unit and the plasma generation unit. After plasma treatment, the exhaust gas directly enters the water washing stage, and some unreacted highly reactive particles may react with water to generate new pollutants, reducing the purification effect and increasing the difficulty of subsequent water treatment. Therefore, this paper proposes a plasma water washing device for POU exhaust gas treatment with high integration and stable purification efficiency. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a plasma water washing device for POU exhaust gas treatment. The main purpose is to solve the problems that particulate matter directly entering the ventilation pipe can easily clog the exhaust port of the ventilation pipe, leading to increased internal air pressure, affecting exhaust gas treatment efficiency, and even causing safety hazards. In addition, unreacted highly active particles may react with water to generate new pollutants, reducing the purification effect and increasing the difficulty of subsequent water treatment.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A plasma water washing device for POU tail gas treatment includes a housing. A water tank is fixed to the bottom inner wall of the housing by bolts. A connecting pipe is fixed to the top of the water tank by bolts. A water washing pipe is welded to one side of the connecting pipe. A liquid supply pipe is welded to the top of the water washing pipe. An ionization pipe is welded to the top of the liquid supply pipe. An air inlet pipe and a plasma nozzle are provided at the top of the ionization pipe, which are connected to an external POU tail gas pipe. A water bath pipe is welded to the top of the connecting pipe. An air outlet pipe for discharging the treated tail gas is welded to the top of the water bath pipe.

[0008] One end of the air inlet pipe inserted into the ionization tube is equipped with an air outlet, which faces the "flame" emitted from the plasma nozzle. An air passage is welded inside the bottom of the ionization tube, which connects the ionization tube and the liquid supply pipe. A filter cloth is provided at the top of the air passage to block particulate matter and delay gas from entering the air passage. A cleaning component is provided inside the ionization tube to clean the surface of the filter cloth. A liquid supply component is provided on one side of the housing to drive water in the water tank to the washing pipe and the connecting pipe. An air outlet component is provided at the bottom of the air passage to evenly disperse the gas. A washing component is provided on one side of the washing pipe to perform a secondary washing of the gas.

[0009] Furthermore, the cleaning assembly includes a rotating scraper that rotates on the outer wall of the circumference of the air passage. The inner wall of the rotating scraper is in contact with the filter cloth. A mounting cover is welded to the top of the air passage. The filter cloth is located between the mounting cover and the air passage. An electric push rod is fixed to one side of the outer wall of the ionization tube by bolts. A pusher is fixed to the movable end of the electric push rod by bolts. One end of the pusher is rotatably connected to a lever arm, and the lever arm is rotatably connected to the rotating scraper. The lever arm is located on one side of the rotation center of the rotating scraper.

[0010] Based on the aforementioned solution, the liquid supply assembly includes a water pump fixed to the inner wall of one side of the tank. The water pump has an inlet pipe at its inlet end and an outlet pipe at its outlet end. The inlet pipe is inserted into the bottom of the water tank, and the outlet pipe is inserted into the bottom of the connecting pipe.

[0011] As a further embodiment of the present invention, the air outlet assembly includes a spiral tube fixed to the bottom of the air passage pipe, and the spiral part of the spiral tube is located inside the water washing pipe, and the top of the spiral tube is provided with multiple air outlet holes.

[0012] Furthermore, the water washing assembly includes a water pipe fixed to one side of the water washing pipe, with one end of the water pipe inserted into the water bath pipe. The water pipe located inside the water bath pipe is provided with a liquid distribution pipe, and the bottom of the liquid distribution pipe is provided with multiple atomizing nozzles. Below the atomizing nozzles is a mesh plate frame fixed inside the water bath pipe, and the mesh plate frame has a conical structure.

[0013] Based on the aforementioned scheme, a reducing tee is provided in the middle of the water pipe, and a one-way valve is provided at the other end of the reducing tee. The other end of the one-way valve is provided with a bent pipe that is inserted into the liquid supply pipe. A gas guide plate is welded inside the liquid supply pipe. A baffle is provided inside the water washing pipe. The baffle is used to divide the water in the water washing pipe into upper and lower parts. A drain pipe for discharging the upper solution is provided at the bottom of the baffle.

[0014] As a further embodiment of the present invention, a connecting pipe is provided between the liquid supply pipe and the water bath pipe, and the connecting pipe is inclined. The air guide plate is located above the connection between the connecting pipe and the liquid supply pipe, and the mesh frame is located above the connection between the connecting pipe and the water bath pipe.

[0015] Furthermore, the upper circumferential outer wall of the liquid supply pipe is provided with multiple vent holes, and the vent holes are located above the air guide plate.

[0016] Based on the aforementioned scheme, a discharge port is provided at the bottom end of the ionization tube, and a plug is inserted into the discharge port.

[0017] As a further embodiment of the present invention, the front side of the housing is provided with a door panel, a plurality of heat dissipation holes are provided on one side of the housing, and a plasma generator fixed on the housing is provided above the water pump.

[0018] Compared with the prior art, the present invention provides a plasma water washing device for POU exhaust gas treatment, which has the following beneficial effects:

[0019] 1. This invention, through the cooperation of multiple components, effectively avoids the problem of particulate matter clogging the exhaust port of the vent pipe, prevents abnormal rise in internal air pressure, and ensures continuous and efficient operation of exhaust gas treatment. At the same time, through the blocking and delaying effect of the filter cloth, highly active particles have more reaction time before entering the water washing stage, reducing the possibility of them reacting with water to generate new pollutants, which not only improves the exhaust gas purification effect, but also reduces the difficulty of subsequent water treatment.

[0020] 2. This invention, by incorporating a cleaning component, can automatically clean particulate matter on the surface of the filter cloth without affecting the normal flow of gas. It features a simple structure and reliable operation, providing strong support for the stable operation of the entire plasma washing equipment and further improving the efficiency and safety of the equipment in treating POU exhaust gas.

[0021] 3. By distributing multiple air outlets at different positions on the spiral tube, this invention can divide the gas into a large number of tiny bubbles, increase the contact area between the gas and water, improve the washing efficiency, and allow soluble pollutants and unreacted active particles in the gas to come into more full contact with the water and be absorbed.

[0022] 4. This invention constructs a highly efficient secondary water washing system through the coordinated work of water pipes, liquid distribution pipes, atomizing nozzles and mesh frame, forming a progressive purification with the initial water washing stage, significantly reducing the residual amount of pollutants in the exhaust gas, and providing a key guarantee for the final discharge of clean exhaust gas.

[0023] 5. This invention achieves cleanliness control of the secondary washing water through the cooperation of components such as reducing tee, one-way valve, air guide plate, and baffle, avoiding the negative impact of the wastewater after the initial washing in the washing pipe on the secondary washing effect, and ensuring that the secondary washing can continuously and efficiently purify the exhaust gas. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of a plasma water washing device for POU tail gas treatment proposed in this invention.

[0025] Figure 2 This is a schematic diagram of the internal structure on the right side of the shell of a plasma water washing device for POU tail gas treatment proposed in this invention.

[0026] Figure 3 This is a schematic diagram of the internal structure on the left side of the housing of a plasma water washing device for POU tail gas treatment proposed in this invention.

[0027] Figure 4 This is a magnified schematic diagram of the ionization tube structure of a plasma water washing device for POU tail gas treatment proposed in this invention.

[0028] Figure 5 This is a schematic cross-sectional view of the ionization tube structure of a plasma water washing device for POU tail gas treatment proposed in this invention.

[0029] Figure 6 This is a schematic cross-sectional view of the gas passage pipe of a plasma water washing device for POU tail gas treatment proposed in this invention.

[0030] Figure 7 This is a cross-sectional view of the liquid supply pipe of a plasma water washing device for POU tail gas treatment proposed in this invention.

[0031] Figure 8 This is a cross-sectional view of the water bath tube structure of a plasma water washing device for POU tail gas treatment proposed in this invention.

[0032] In the diagram: 1. Cabinet; 2. Air inlet pipe; 3. Air outlet pipe; 4. Door panel; 5. Heat dissipation vent; 6. Water tank; 7. Ionization tube; 8. Water bath pipe; 9. Water pump; 10. Water inlet pipe; 11. Water outlet pipe; 12. Plasma generator; 13. Plasma nozzle; 14. Liquid supply pipe; 15. Vent; 16. Connecting pipe; 17. Water washing pipe; 18. Connecting pipe; 19. Air outlet; 20. 21. Air passage pipe; 22. Electric push rod; 23. Push frame; 24. Lever arm; 25. Rotary scraper frame; 26. Filter cloth; 27. Mounting cover; 28. Plug; 29. ​​Water passage pipe; 30. Reducing tee; 31. Check valve; 32. Air guide plate; 33. Baffle plate; 34. Spiral tube; 35. Air outlet; 36. Drain pipe; 37. Liquid distribution pipe; 38. Atomizing nozzle; 39. Mesh plate frame. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0034] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this invention, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0035] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0036] Please see Figures 1-8As shown, a plasma water washing device for POU tail gas treatment includes a housing 1. A water tank 6 is fixed to the bottom inner wall of the housing 1 by bolts. A connecting pipe 18 is fixed to the top of the water tank 6 by bolts. A water washing pipe 17 is welded to one side of the connecting pipe 18. A liquid supply pipe 14 is welded to the top of the water washing pipe 17. An ionization pipe 7 is welded to the top of the liquid supply pipe 14. An air inlet pipe 2 and a plasma nozzle 13 connected to an external POU tail gas pipe are provided at the top of the ionization pipe 7. A water bath pipe 8 is welded to the top of the connecting pipe 18. An air outlet pipe 3 for discharging the treated tail gas is welded to the top of the water bath pipe 8.

[0037] One end of the air inlet pipe 2 inserted into the ionization pipe 7 is provided with an air outlet 19. The air outlet 19 is directed toward the "flame" (plasma flame or plasma jet) ejected from the plasma nozzle 13. An air passage pipe 20 is welded inside the bottom of the ionization pipe 7. The air passage pipe 20 is used to connect the ionization pipe 7 and the liquid supply pipe 14. A filter cloth 25 is provided at the top of the air passage pipe 20. The filter cloth 25 is used to block particulate matter and delay the gas from entering the air passage pipe 20. A cleaning component is provided inside the ionization pipe 7 to clean the surface of the filter cloth 25. A liquid supply component is provided on one side of the housing 1 to drive the water in the water tank 6 to the water washing pipe 17 and the connecting pipe 18. An air outlet component is provided at the bottom of the air passage pipe 20 to evenly disperse the gas. A water washing component is provided on one side of the water washing pipe 17 to perform secondary water washing on the gas.

[0038] Based on the above, the simplified usage method of the plasma water washing equipment for POU exhaust gas treatment is as follows:

[0039] First, fill the water tank 6 with clean water, then introduce the POU exhaust gas into the ionization tube 7 through the air inlet pipe 2, and guide the exhaust gas to the "flame" area sprayed by the plasma nozzle 13 through the air outlet 19, so that the pollutants in the exhaust gas will undergo a decomposition reaction under the action of plasma.

[0040] The gas after the reaction carries a small amount of particulate matter downwards. When it passes through the filter cloth 25, the particulate matter is blocked on the surface of the filter cloth 25. At the same time, the gas flow rate is slowed down due to the obstruction of the filter cloth 25, providing more time for subsequent reactions.

[0041] The cleaning unit regularly cleans the particles accumulated on the surface of the filter cloth 25 to prevent the filter cloth 25 from becoming clogged and affecting gas flow;

[0042] Subsequently, the gas enters the liquid supply pipe 14 through the gas outlet pipe 20. After the gas outlet component evenly disperses the gas, it is introduced into the water in the water washing pipe 17. The water in the water washing pipe 17 performs preliminary washing on the gas, removing some soluble pollutants and unreacted active particles.

[0043] Next, the gas enters the water bath tube 8 through the connecting pipe 18. The atomized water in the water bath tube 8 further washes the gas a second time, deeply purifying the residual pollutants.

[0044] Finally, the treated clean exhaust gas is discharged from the equipment through the exhaust pipe 3;

[0045] The liquid supply component continuously delivers water from the water tank 6 to the washing pipe 17 and the connecting pipe 18 to ensure the stable operation of the washing process.

[0046] Through the cooperation of multiple components, the problem of particulate matter clogging the vent pipe exhaust port is effectively avoided, preventing abnormal rise in internal air pressure and ensuring continuous and efficient operation of exhaust gas treatment. At the same time, through the blocking and delaying effect of filter cloth 25, highly active particles have more reaction time before entering the water washing stage, reducing the possibility of them reacting with water to generate new pollutants. This not only improves the exhaust gas purification effect but also reduces the difficulty of subsequent water treatment, achieving safe and efficient treatment of POU exhaust gas.

[0047] In order to clean the surface of filter cloth 25;

[0048] The cleaning assembly includes a rotating scraper 24 that rotates on the outer circumference of the air passage 20. The inner wall of the rotating scraper 24 is in contact with the filter cloth 25. A mounting cover 26 is welded to the top of the air passage 20. The filter cloth 25 is located between the mounting cover 26 and the air passage 20. An electric push rod 21 is fixed to one side of the outer wall of the ionization tube 7 by bolts. A pusher 22 is fixed to the movable end of the electric push rod 21 by bolts. One end of the pusher 22 is rotatably connected to a lever 23, and the lever 23 is rotatably connected to the rotating scraper 24. The lever 23 is located on one side of the rotation center of the rotating scraper 24. A discharge port is opened at the bottom of the ionization tube 7, and a plug 27 is inserted into the discharge port.

[0049] When the movable end of the electric push rod 21 extends or retracts, it will drive the push frame 22 to perform linear reciprocating motion. The push frame 22 converts the linear motion into the rotational motion of the rotating scraper 24 through the lever arm 23, so that the rotating scraper 24 rotates along the surface of the filter cloth 25, thereby scraping off the particles accumulated on the filter cloth 25, ensuring the air permeability of the filter cloth 25 and avoiding obstruction of gas flow.

[0050] The mounting cover 26 serves to fix the filter cloth 25, preventing it from shifting under the impact of gas and the scraping of the rotating scraper 24, thus ensuring that the cleaning components can clean the filter cloth 25 stably over a long period of time.

[0051] The cleaning component can automatically clean particulate matter on the surface of the filter cloth 25 without affecting the normal flow of gas. It features a simple structure and reliable operation, providing a strong guarantee for the stable operation of the entire plasma water washing equipment and further improving the efficiency and safety of the equipment in treating POU exhaust gas.

[0052] When it is necessary to clean up the accumulated particulate matter inside, simply open the plug 27 at the bottom of the ionization tube 7 to discharge the accumulated particulate matter through the discharge port, thereby completing the rapid cleaning of particulate matter without disassembling complex parts, which greatly simplifies the equipment maintenance process, reduces the workload of operators, and ensures that the equipment can maintain a high-efficiency operating state for a long time.

[0053] It should be noted that the electric push rod 21 is existing technology. It is used in conjunction with a magnetic switch, proximity switch or photoelectric switch to achieve precise control of the push rod's extension and retraction displacement. Those skilled in the art can set it according to actual needs.

[0054] In order to drive the water in the water tank 6 to the water washing pipe 17 and the connecting pipe 18;

[0055] The liquid supply assembly includes a water pump 9 fixed to the inner wall of one side of the tank 1. The water pump 9 has an inlet pipe 10 at its inlet end and an outlet pipe 11 at its outlet end. The inlet pipe 10 is inserted into the bottom of the water tank 6, and the outlet pipe 11 is inserted into the bottom of the connecting pipe 18.

[0056] When water supply is needed, water pump 9 is started. Water in water tank 6 is sucked into water pump 9 through water inlet pipe 10. After being pressurized by water pump 9, it is transported to connecting pipe 18 through water outlet pipe 11. Water in connecting pipe 18 directly enters water washing pipe 17 to provide water source for the initial washing process in water washing pipe 17.

[0057] The liquid supply component, through the stable operation of the water pump 9, achieves a continuous water supply to the water washing pipe 17, ensuring sufficient water volume for pollutant removal during the water washing process. Furthermore, its compact structure ensures the continuity and stability of the entire water washing process, providing reliable hydraulic support for the purification of exhaust gas.

[0058] In order to evenly disperse the gas entering the water washing pipe 17;

[0059] The air outlet assembly includes a spiral tube 33 fixed to the bottom of the air pipe 20, and the spiral part of the spiral tube 33 is located inside the water washing pipe 17. The top of the spiral tube 33 is provided with multiple air outlet holes 34.

[0060] After plasma treatment, the gas enters the spiral tube 33 through the gas pipe 20 and flows through the spiral structure of the spiral tube 33. The flow path of the gas in the spiral tube 33 is extended, so that the gas is evenly dispersed into the water in the water washing pipe 17 through multiple gas outlets 34.

[0061] Multiple air outlets 34 are distributed at different positions in the spiral tube 33, which can divide the gas into a large number of tiny bubbles, increase the contact area between the gas and water, improve the water washing efficiency, and allow soluble pollutants and unreacted active particles in the gas to come into more full contact with water and be absorbed.

[0062] Meanwhile, the spiral tube 33 can also play a certain buffering role, preventing a large amount of gas from rushing directly into the washing pipe 17 and causing violent fluctuations in the water surface, maintaining the stability of the washing environment, and ensuring the smooth progress of the initial washing process.

[0063] To perform a second water wash on the gas;

[0064] The washing assembly includes a water pipe 28 fixed to one side of the washing pipe 17, and one end of the water pipe 28 is inserted into the water bath pipe 8. The water pipe 28 located in the water bath pipe 8 is provided with a liquid distribution pipe 36. Multiple atomizing nozzles 37 are provided at the bottom of the liquid distribution pipe 36. Below the atomizing nozzles 37 is a mesh frame 38 fixed in the water bath pipe 8. The mesh frame 38 has a conical structure.

[0065] The water in the water washing pipe 17 will flow into the distribution pipe 36 through the water pipe 28. The distribution pipe 36 will distribute the water to multiple atomizing nozzles 37. The atomizing nozzles 37 will atomize the water into fine droplets and spray them downwards.

[0066] When the gas enters the water bath tube 8 from the connecting pipe 18, it will flow upward and come into full contact with the atomized droplets. The conical mesh plate frame 38 can guide and disperse the rising gas, prolong the residence time of the gas in the water bath tube 8, and make the contact between the gas and the atomized droplets more uniform.

[0067] Residual pollutants in the gas are captured by atomized droplets and fall onto the mesh plate frame 38 with the droplets, and finally flow back into the connecting pipe 18 along the water bath pipe 8, thus achieving deep purification of the gas.

[0068] The atomizing nozzle 37 transforms water into fine droplets distributed over a large area, which greatly increases the gas-liquid contact area compared to traditional spraying methods, allowing residual pollutant molecules to have more opportunities to combine with water and be removed.

[0069] The cone-shaped mesh plate frame 38 not only guides the gas to be evenly distributed through its special structure, avoiding excessive local gas flow rate and insufficient purification, but also plays a certain role in intercepting falling droplets, so that the droplets form a water film on the mesh plate surface, further enhancing the adsorption effect on trace pollutants in the gas.

[0070] The water washing assembly, through the coordinated work of the water pipe 28, the liquid distribution pipe 36, the atomizing nozzle 37 and the mesh frame 38, constructs a highly efficient secondary water washing system, forming a progressive purification with the preliminary water washing stage, significantly reducing the residual amount of pollutants in the exhaust gas, and providing a key guarantee for the final discharge of clean exhaust gas.

[0071] In order to ensure that the water used in the second washing is clean;

[0072] A reducing tee 29 is provided in the middle of the water pipe 28. A one-way valve 30 is provided at the other end of the reducing tee 29. A bent pipe is inserted into the liquid supply pipe 14 at the other end of the one-way valve 30. An air guide plate 31 is welded inside the liquid supply pipe 14. The air guide plate 31 is inclined. A baffle 32 is provided inside the water washing pipe 17. The baffle 32 is used to divide the water in the water washing pipe 17 into upper and lower parts. A drain pipe 35 is provided at the bottom of the baffle 32 to discharge the upper solution. A connecting pipe 16 is provided between the liquid supply pipe 14 and the water bath pipe 8. The connecting pipe 16 is inclined. The air guide plate 31 is located above the connection between the connecting pipe 16 and the liquid supply pipe 14. The mesh frame 38 is located above the connection between the connecting pipe 16 and the water bath pipe 8.

[0073] When gas enters the water washing pipe 17 from the spiral tube 33, some of the gas will enter the liquid supply pipe 14. The gas guide plate 31 can guide the gas to flow into the connecting pipe 16, thereby entering the water bath pipe 8, while preventing the gas from accumulating in the liquid supply pipe 14 and forming local high pressure.

[0074] The one-way valve 30 ensures that the water in the water pipe 28 can only flow in one direction, preventing the water in the supply pipe 14 from flowing back to the supply pipe 14 due to pressure changes, and ensuring that the water entering the distribution pipe 36 is always relatively clean and fresh water below the partition 32.

[0075] The partition 32 divides the water in the washing pipe 17 into two layers: the lower layer is the water that has not been washed, and the upper layer is the water that has been washed by the water pipe 28. The drain pipe 35 can periodically discharge the water in the upper layer that contains more pollutants to prevent the accumulation of water in the upper layer.

[0076] The inclined connecting pipe 16 facilitates the smooth entry of gas into the water bath pipe 8. Meanwhile, the air guide plate 31 is located above the interface of the connecting pipe 16, which can effectively guide the gas into the connecting pipe 16. The layout of the mesh plate frame 38 above the interface of the connecting pipe 16 ensures that the gas entering the water bath pipe 8 must first pass through the washing area of ​​atomized droplets during its ascent, thus improving the reliability of the secondary water washing.

[0077] By coordinating components such as the reducing tee 29, one-way valve 30, air guide plate 31, and baffle 32, the cleanliness of the water used for secondary washing is controlled, avoiding the negative impact of wastewater after the initial washing in the washing pipe 17 on the effect of secondary washing, and ensuring that secondary washing can continuously and efficiently purify the exhaust gas.

[0078] To ensure the gas temperature is at room temperature;

[0079] Multiple vent holes 15 are provided on the outer circumference of the upper end of the liquid supply pipe 14, and the vent holes 15 are located above the air guide plate 31. The vent holes 15 are used to regulate the temperature of the gas in the gas pipe 20 to prevent the gas temperature from being too high and entering the water washing area. When the gas enters the liquid supply pipe 14 from the gas pipe 20, the temperature may rise during the plasma treatment process. If the high temperature gas directly enters the water washing process, it may cause water vaporization to intensify, affecting the water washing effect and even damaging the water washing components.

[0080] The vent 15 allows the high-temperature gas in the liquid supply pipe 14 to exchange heat with the external environment through natural exchange with the outside air, thereby reducing the gas temperature to close to room temperature. Temperature regulation can be achieved by natural ventilation. The structure is simple and energy consumption is low, which effectively ensures the temperature stability of the gas entering the washing area and creates suitable environmental conditions for the efficient operation of the subsequent washing process.

[0081] Meanwhile, the air guide plate 31 is located below the air vent 15, which not only does not affect the heat dissipation function of the air vent 15, but also guides the gas to flow to the connecting pipe 16, ensuring that the gas after heat dissipation smoothly enters the water bath pipe 8 for secondary water washing.

[0082] The front of the housing 1 is provided with a door panel 4, and multiple heat dissipation holes 5 are provided on one side of the housing 1. Above the water pump 9, there is a plasma generator 12 fixed on the housing 1. The plasma nozzle 13 is the discharge end of the plasma generator 12. The plasma generator 12 is connected to the plasma nozzle 13 through a wire to provide it with high voltage power to generate a plasma flame.

[0083] The door panel 4 is used to open and close the internal components during maintenance, allowing operators to quickly open the cabinet 1 when the equipment malfunctions or needs maintenance, and to inspect, replace or repair the core components such as the ionization tube 7, plasma nozzle 13, and water washing tube 17 without disassembling the entire equipment, thus significantly shortening the maintenance time.

[0084] The heat dissipation holes 5 are used to dissipate heat inside the cabinet 1, preventing the performance or service life of electrical components such as the plasma generator 12 from being affected by excessive temperature during long-term operation, and ensuring the safety and stability of the overall operation of the equipment.

[0085] It should be noted that the plasma generator 12 and the plasma nozzle 13 are existing technologies. They are combined to form a plasma torch. The structure and principle of the plasma torch can be learned by those skilled in the art through technical manuals, and will not be described in detail here.

[0086] The present invention is used in the following steps:

[0087] S1: Fill the water tank 6 with clean water, start the water pump 9, and the water in the water tank 6 is sucked into the water pump 9 through the water inlet pipe 10. After being pressurized by the water pump 9, it is delivered to the connecting pipe 18 through the water outlet pipe 11. The water in the connecting pipe 18 directly enters the lower part of the baffle 32 in the water washing pipe 17, and flows into the upper part of the baffle 32 and the liquid distribution pipe 36 through the water pipe 28 respectively.

[0088] S2: The separator 36 distributes water to multiple atomizing nozzles 37, which atomize the water into fine droplets and spray them downwards.

[0089] S3: At the same time, the POU exhaust gas is introduced into the ionization tube 7 through the intake pipe 2, and the exhaust head 19 guides the exhaust gas to the "flame" area sprayed by the plasma nozzle 13, so that the pollutants in the exhaust gas undergo decomposition reaction under the action of plasma.

[0090] S4: The gas after the reaction carries a small amount of particulate matter downwards. When it passes through the filter cloth 25, the particulate matter is blocked on the surface of the filter cloth 25. At the same time, the gas flow rate is slowed down due to the obstruction of the filter cloth 25, providing more time for subsequent reactions.

[0091] S5: Gas enters the spiral tube 33 through the gas pipe 20 and flows through the spiral structure of the spiral tube 33. The flow path of the gas in the spiral tube 33 is extended, so that the gas is evenly dispersed into the water in the water washing pipe 17 through multiple gas outlets 34.

[0092] S6: Multiple air outlets 34 are distributed at different positions in the spiral tube 33, which can divide the gas into a large number of tiny bubbles, increase the contact area between the gas and water, improve the water washing efficiency, and allow soluble pollutants and unreacted active particles in the gas to come into more full contact with water and be absorbed.

[0093] S7: After one treatment, the gas enters the water bath tube 8 through the connecting pipe 18 and the connecting pipe 16, and will come into full contact with the atomized droplets. The conical mesh plate frame 38 can guide and disperse the rising gas, prolong the residence time of the gas in the water bath tube 8, and at the same time make the contact between the gas and the atomized droplets more uniform.

[0094] S8: At the same time, residual pollutants in the gas are captured by atomized droplets and fall onto the mesh plate frame 38 with the droplets, and finally flow back into the connecting pipe 18 along the water bath pipe 8, thus achieving deep purification of the gas.

[0095] S9: Finally, the treated clean exhaust gas is discharged from the equipment through the exhaust pipe 3.

[0096] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0097] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A plasma water washing device for POU tail gas treatment, comprising a housing (1), characterized in that, A water tank (6) is fixedly connected to the bottom inner wall of the box (1). A connecting pipe (18) is fixedly connected to the top of the water tank (6). A water washing pipe (17) is welded to one side of the connecting pipe (18). A liquid supply pipe (14) is welded to the top of the water washing pipe (17). An ionization pipe (7) is welded to the top of the liquid supply pipe (14). An air inlet pipe (2) and a plasma nozzle (13) connected to the external POU tail gas pipe are provided on the top of the ionization pipe (7). A water bath pipe (8) is welded to the top of the connecting pipe (18). An air outlet pipe (3) for discharging the treated tail gas is welded to the top of the water bath pipe (8). The inlet pipe (2) is inserted into the ionization pipe (7) and has an outlet (19) at one end. The outlet (19) is directed toward the "flame" ejected from the plasma nozzle (13). The bottom of the ionization pipe (7) is welded with an air passage (20). The air passage (20) is used to connect the ionization pipe (7) and the liquid supply pipe (14). The top of the air passage (20) is provided with a filter cloth (25). The filter cloth (25) is used to block particulate matter and delay the entry of gas into the air passage (20). The ionization pipe (7) is provided with a cleaning component to clean the surface of the filter cloth (25). One side of the box (1) is provided with a liquid supply component to drive the water in the water tank (6) to the water washing pipe (17) and the connecting pipe (18). The bottom of the air passage (20) is provided with an outlet component to evenly disperse the gas. One side of the water washing pipe (17) is provided with a water washing component to perform secondary water washing on the gas. The cleaning assembly includes a rotating scraper (24) that rotates on the outer circumference of the air passage (20). The inner wall of the rotating scraper (24) is in contact with the filter cloth (25). A mounting cover (26) is welded to the top of the air passage (20). The filter cloth (25) is located between the mounting cover (26) and the air passage (20). An electric push rod (21) is fixedly connected to one side of the outer wall of the ionization tube (7). A push frame (22) is fixedly connected to the movable end of the electric push rod (21). A force arm (23) is rotatably connected to one end of the push frame (22). The force arm (23) is rotatably connected to the rotating scraper (24), and the force arm (23) is located on one side of the rotation center of the rotating scraper (24). The air outlet assembly includes a spiral tube (33) fixed to the bottom of the air outlet pipe (20), and the spiral part of the spiral tube (33) is located inside the water washing pipe (17). The top of the spiral tube (33) is provided with multiple air outlet holes (34). The washing assembly includes a water pipe (28) fixed to one side of the washing pipe (17), and one end of the water pipe (28) is inserted into the water bath pipe (8). The water pipe (28) located in the water bath pipe (8) is provided with a liquid distribution pipe (36). The bottom of the liquid distribution pipe (36) is provided with multiple atomizing nozzles (37). Below the atomizing nozzles (37) is a mesh frame (38) fixed in the water bath pipe (8). The mesh frame (38) has a conical structure.

2. The plasma water washing equipment for POU tail gas treatment according to claim 1, characterized in that, The liquid supply assembly includes a water pump (9) fixed to the inner wall of one side of the tank (1). The water pump (9) has an inlet pipe (10) at the inlet end and an outlet pipe (11) at the outlet end. The inlet pipe (10) is inserted into the bottom of the water tank (6), and the outlet pipe (11) is inserted into the bottom of the connecting pipe (18).

3. The plasma water washing equipment for POU tail gas treatment according to claim 1, characterized in that, The middle part of the water pipe (28) is provided with a reducing tee (29), and the other end of the reducing tee (29) is provided with a one-way valve (30). The other end of the one-way valve (30) is provided with a bent pipe inserted into the liquid supply pipe (14). The liquid supply pipe (14) is welded with a gas guide plate (31). The water washing pipe (17) is provided with a partition (32). The partition (32) is used to divide the water in the water washing pipe (17) into two parts, upper and lower. The bottom of the partition (32) is provided with a drain pipe (35) for discharging the upper solution.

4. The plasma water washing equipment for POU tail gas treatment according to claim 3, characterized in that, A connecting pipe (16) is provided between the liquid supply pipe (14) and the water bath pipe (8), and the connecting pipe (16) is inclined. The air guide plate (31) is located above the connection between the connecting pipe (16) and the liquid supply pipe (14), and the mesh plate frame (38) is located above the connection between the connecting pipe (16) and the water bath pipe (8).

5. The plasma water washing equipment for POU tail gas treatment according to claim 3, characterized in that, The upper end of the liquid supply pipe (14) has multiple vent holes (15) on its outer circumference, and the vent holes (15) are located above the air guide plate (31).

6. The plasma water washing equipment for POU tail gas treatment according to claim 1, characterized in that, The bottom end of the ionization tube (7) is provided with a discharge port, and a plug (27) is inserted into the discharge port.

7. The plasma water washing equipment for POU tail gas treatment according to claim 2, characterized in that, The front side of the box (1) is provided with a door panel (4), and a plurality of heat dissipation holes (5) are provided on one side of the box (1). Above the water pump (9) is a plasma generator (12) fixed on the box (1).

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