Anti-clogging exhaust gas treatment device for n-methylpyrrolidone production

Abstract

This invention relates to the field of waste gas treatment technology, and more particularly to an anti-clogging waste gas treatment device for the preparation of N-methylpyrrolidone. It includes a support frame, to which a spray shell is fixedly connected. A water pump is fixedly connected to the outside of the spray shell. The outlet of the water pump is connected to a first conduit. A second conduit is provided on the first conduit. The second conduit is fixedly connected to and connected to circumferentially distributed water outlet pipes. The water outlet pipes are connected to a connecting shell. The connecting shell is connected to a third conduit. A first fixing shell is fixedly connected to the third conduit. The first fixing shell is fixed to symmetrically distributed second fixing shells. Symmetrically distributed fixing members are rotatably connected between the symmetrically distributed second fixing shells. This invention treats impurities in the gas by spraying water mist from two adjacent fixing members to mix with the gas. By separating the two fixing members, the nozzle instantly enlarges, and the impact of the water discharges crystals, preventing the fixing members from being blocked.

Description

Technical Field

[0001] This invention relates to the field of waste gas treatment technology, and in particular to an anti-clogging waste gas treatment device for the preparation of N-methylpyrrolidone. Background Technology

[0002] In the preparation of N-methylpyrrolidone, the N-methylpyrrolidone produced in the reaction needs to be purified. During the purification process, some N-methylpyrrolidone and other reactants will evaporate along with water vapor. If N-methylpyrrolidone is released into the atmosphere along with water vapor, it will cause air pollution. Currently, pollutants in waste gas are generally removed by spraying in a spray tower. The spray tower uses the interaction of circulating liquid and gas to adsorb harmful substances in the gas into the liquid, thus treating the waste gas. During the long-term use of the spray tower, the concentration of harmful substances in the liquid in the spray tower will gradually increase. When the concentration is too high, crystals will form. However, in order to increase the contact area between gas and liquid, some nozzles on the spray tower need to spray water mist. These nozzles have small nozzles. When crystals enter the circulation, they will clog the nozzles, thus preventing water and gas from contacting each other and reducing the cleaning effect of the waste gas. Summary of the Invention

[0003] To overcome the drawback that crystals generated in the liquid can clog the nozzles after entering the circulation, this invention provides an anti-clogging waste gas treatment device for the preparation of N-methylpyrrolidone.

[0004] The technical solution of this invention is: an anti-clogging waste gas treatment device for the preparation of N-methylpyrrolidone, comprising a support frame, a spray shell fixedly connected to the support frame, an air inlet pipe fixedly connected to the lower side of the spray shell, the air inlet pipe communicating with an annular shell located inside the spray shell, an air jet plate provided on the annular shell, the air jet plate being provided with nozzles communicating with the annular shell and circumferentially distributed thereon, a water pump fixedly connected to the outside of the spray shell, the inlet of the water pump communicating with the bottom of the spray shell through a pipe, the outlet of the water pump communicating with a first conduit, the first conduit being provided with a second conduit, the second... Two conduits are located in the middle of the spray shell. An air outlet pipe is connected to the upper side of the spray shell. The second conduit is fixed and connected to a circumferentially distributed water outlet pipe. The water outlet pipe is connected to a connecting shell. The connecting shell is connected to a third conduit. The third conduit is fixed to a first fixed shell. The first fixed shell is fixed to symmetrically distributed second fixed shells. Symmetrically distributed fixing members are rotatably connected between the symmetrically distributed second fixed shells. The fixing members are slidably and sealingly connected to the adjacent second fixed shells. An adjustment mechanism is provided on the outside of the water outlet pipe for adjusting the position of the adjacent and symmetrically distributed fixing members.

[0005] Furthermore, the adjusting mechanism includes a piston housing, which is fixedly connected to the adjacent water outlet pipe and communicates with the adjacent connecting housing. The connecting housing is filled with hydraulic oil. The piston housing is slidably connected to a piston rod, and a first spring is fixedly connected between the piston rod and the adjacent piston housing. The piston rod is slidably connected to a sliding frame, and the sliding frame is limited and engaged with the adjacent and symmetrically distributed fixing members. The sliding frame is fixedly connected to a sealing ring, and the third conduit and the adjacent and symmetrically distributed fixing members are slidably connected to the adjacent sealing ring.

[0006] Furthermore, the sliding frame is fixedly connected to symmetrically distributed sliding rods, and the sliding rods are slidably connected to adjacent and symmetrically distributed second fixed shells. The second fixed shells are slidably connected to limit plates, and the limit plates are sealed to adjacent fixed components. A second spring is fixedly connected between the limit plate and the adjacent second fixed shell. The limit plate is fixedly connected to symmetrically distributed steel wire ropes, and the end of the steel wire rope away from the adjacent limit plate is fixedly connected to the adjacent sliding rod.

[0007] Furthermore, it also includes a first fixing plate, which is fixed to the spray shell. The spray shell is fixed to a second fixing plate and a third fixing plate. The first fixing plate, the second fixing plate, and the third fixing plate are arranged sequentially from top to bottom. There is a gap between the first fixing plate and the second fixing plate, and there is a gap between the second fixing plate and the third fixing plate. Both the second fixing plate and the third fixing plate have holes. Both the second fixing plate and the third fixing plate are provided with switch components for controlling whether the holes on them are opened. The second conduit is fixed to and connects to two disc-shaped parts. The second conduit is fixed to a first arc-shaped plate and a second arc-shaped plate. The first arc-shaped plate and the second arc-shaped plate are respectively fixed to the adjacent first fixing shell.

[0008] Furthermore, both the second fixing plate and the third fixing plate are arc-shaped. The gap between the first fixing plate and the second fixing plate corresponds to the adjacent disc-shaped component. The disc-shaped component consists of two discs and a connecting rod between them. The two discs are connected to the second conduit.

[0009] Furthermore, a motor is fixedly connected to the spray shell, the output shaft of the motor is fixedly connected to the second conduit, the second conduit and the jet disc are driven by a rubber wheel set, the annular shell is rotatably connected to the jet disc, and the first conduit and the second conduit are rotatably connected.

[0010] Furthermore, the switch assembly includes a fixing rod, which is fixedly connected to the spray shell. The fixing rod is slidably connected to an airbag and a sealing plug. The airbag and the adjacent sealing plug are fixedly connected. The airbag is located on the upper side of the adjacent sealing plug. The holes on the second fixing plate and the holes on the third fixing plate are respectively sealed to the adjacent sealing plugs.

[0011] Furthermore, the spray shell is fixedly connected to a packing shell, which is located above the first fixed plate. A first conical shell is fixedly connected to the lower side of the packing shell. The first conical shell is rotatably connected to the adjacent disc-shaped component. The second conduit is fixedly connected to and connected to symmetrically distributed first connecting pipes, which are located inside the packing shell. The first connecting pipes have evenly distributed holes on their upper and lower sides. A second conical shell is fixedly connected to the upper side of the packing shell.

[0012] Furthermore, the upper side of the second conical shell is fixed with circumferentially distributed ultrasonic transducers, the spray shell is fixed with circumferentially distributed guide plates, the ultrasonic transducers are located between adjacent guide plates, the upper side of the second conduit is fixed with and connected to a second connecting pipe, the second connecting pipe is fixed with and connected to an annular nozzle, the second connecting pipe is fixed with a rotating component, a filter screen is fixed with the rotating component, a demister is fixed inside the rotating component, and activated carbon packing is fixed with the upper side of the spray shell.

[0013] Furthermore, the rotating component consists of two annular cylinders, the filter screen is fixed to the annular block on the outside of the rotating component, and the activated carbon packing is located above the demister.

[0014] The beneficial effects of the above technical solution are as follows: the present invention treats impurities in the gas by spraying water mist and mixing it with gas through two adjacent fixing parts. After the fixing parts are blocked by crystals, the two fixing parts are separated, making the nozzle instantly larger. The crystals are discharged by the impact of water, thus preventing the fixing parts from being blocked.

[0015] This invention increases the contact area between water and gas by mixing gas and water mist, using the water mist to adsorb impurities in the gas, and then collecting the water mist through a water curtain, thereby controlling the water mist within a certain range and preventing water mist from being discharged.

[0016] This invention generates water mist by vibrating an ultrasonic transducer. When the gas passes through the guide plate, it carries the water mist upwards, causing the water droplets on the upper side to collide with the gas and water mist on the lower side, removing impurities from the gas. Then, the gas is further intercepted by a filter screen. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a three-dimensional structural diagram of the water pump and the first conduit of the present invention;

[0019] Figure 3 This is a three-dimensional structural diagram of the internal structure of the spray shell of the present invention;

[0020] Figure 4 This is a three-dimensional structural diagram of the first fixing plate and the second fixing plate of the present invention;

[0021] Figure 5 This is a three-dimensional structural diagram of the water outlet pipe, connecting shell, and fixing component of the present invention;

[0022] Figure 6 This is a three-dimensional structural schematic diagram of the adjustment mechanism of the present invention;

[0023] Figure 7 This is an exploded three-dimensional view of the water outlet pipe and sliding frame of the present invention.

[0024] Figure 8 This is a three-dimensional structural diagram of the internal parts of the second fixed shell of the present invention;

[0025] Figure 9 This is a three-dimensional structural cross-sectional view of the packing shell and the first conical shell of the present invention;

[0026] Figure 10 This is a three-dimensional structural diagram of the fixing rod, airbag, and sealing plug of the present invention;

[0027] Figure 11 This is a three-dimensional structural diagram of the second connecting pipe, the annular nozzle, and the rotating component of the present invention.

[0028] The markings in the attached diagram are as follows: 1-Support frame, 11-Spray shell, 12-Inlet pipe, 13-Annular shell, 14-Jet disc, 15-Water pump, 16-First conduit, 17-Second conduit, 18-Outlet pipe, 2-Outlet water pipe, 21-Connecting shell, 22-Third conduit, 23-First fixed shell, 24-Second fixed shell, 25-Fixing component, 3-Piston shell, 31-First spring, 32-Piston rod, 33-Sliding frame, 34-Sealing ring, 4-Sliding rod, 41-Limiting plate, 42-Second spring, 4 3-Steel wire rope, 5-First fixing plate, 51-Second fixing plate, 52-Third fixing plate, 53-Disc-shaped component, 54-First arc-shaped plate, 55-Second arc-shaped plate, 56-Motor, 6-Fixing rod, 61-Airbag, 62-Sealing plug, 7-Packing shell, 71-First conical shell, 72-First connecting pipe, 73-Second conical shell, 8-Ultrasonic vibrator, 81-Guide plate, 82-Second connecting pipe, 83-Annular nozzle, 84-Rotating component, 85-Filter screen, 86-Demister, 87-Activated carbon packing. Detailed Implementation

[0029] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0030] During the preparation and purification of N-methylpyrrolidone, a portion of N-methylpyrrolidone is released into the atmosphere along with water vapor, causing air pollution. To protect the atmosphere, the waste gas from the production process needs to be treated. Currently, this is generally done by spraying with a spray tower to remove pollutants from the waste gas. The spray tower uses a circulating liquid-gas collision to adsorb harmful substances from the gas into the liquid, thus treating the waste gas. However, during long-term use of the spray tower, the concentration of harmful substances in the liquid in the spray tower gradually increases. When the concentration is too high, crystals will form. When liquid containing crystals enters the spray tower and circulates inside, and is sprayed out from the nozzles, the crystals can clog some small nozzles, reducing the cleaning effect of the waste gas. Therefore, this invention improves upon this by implementing the following steps:

[0031] Example 1: An anti-clogging waste gas treatment device for the preparation of N-methylpyrrolidone, such as Figures 1-5 As shown, the system includes a support frame 1, to which a spray shell 11 is fixedly connected. An air inlet pipe 12 is fixedly connected to the lower side of the spray shell 11. During use, exhaust gas is introduced through the air inlet pipe 12. The air inlet pipe 12 connects to an annular shell 13, which is located inside the spray shell 11. A gap exists between the annular shell 13 and the bottom surface of the spray shell 11 to hold liquid, which is water. A jet plate 14 is provided on the upper side of the annular shell 13, and the jet plate 14 is equipped with a device connected to the annular shell 13. The spray housing 11 has circumferentially distributed nozzles. A water pump 15 is fixedly connected to the left side of the spray housing 11. The inlet of the water pump 15 is connected to the bottom of the spray housing 11 through a pipe. The outlet of the water pump 15 is connected to a first conduit 16. A second conduit 17 is provided on the first conduit 16. In use, water sequentially passes through the water pump 15 and the first conduit 16 into the second conduit 17. The second conduit 17 is located in the middle of the spray housing 11. An air outlet pipe 18 is connected to the upper side of the spray housing 11. The second conduit 17 is fixedly connected to and connected to two sets of water outlet pipes 2. Each set of water outlet pipes 2 consists of four circumferentially distributed pipes. The water outlet pipes 2 are connected to a connecting shell 21. The inner side of the connecting shell 21 is made of soft material. The connecting shell 21 is connected to a third conduit 22. The third conduit 22 is fixedly connected to a first fixed shell 23. The first fixed shell 23 is square. Inside the first fixed shell 23, two symmetrically distributed second fixed shells 24 are fixedly connected. Two symmetrically distributed fixing members 25 are rotatably connected between the two symmetrically distributed second fixed shells 24. The two fixing members 25 form a nozzle. In use, water sprays out from between the two fixing members 25. The fixing members 25 are sealed and slidably connected to the adjacent second fixed shells 24. When the nozzle formed by the two fixing members 25 is blocked, the two adjacent fixing members 25 rotate and separate from each other. An adjustment mechanism is provided on the outside of the water outlet pipe 2. The adjustment mechanism is used to adjust the position of the two adjacent and symmetrically distributed fixing members 25.

[0032] like Figures 5-7 As shown, the regulating mechanism includes a piston housing 3, which is fixedly connected to the adjacent outlet pipe 2. The piston housing 3 is connected to the adjacent connecting housing 21 via a pipe. The connecting housing 21 is filled with hydraulic oil. The piston housing 3 is slidably connected to a piston rod 32. Figure 6 Taking a piston housing 3 as an example, two limiting rings are fixed to the right side of the piston rod 32. A first spring 31 is fixed between the piston rod 32 and the adjacent piston housing 3. Initially, the first spring 31 is charged and located on the left side of the piston rod 32. The piston rod 32 is slidably connected to a sliding frame 33. The piston rod 32 limits the sliding frame 33 through the two limiting rings on it. There is a certain distance between the two limiting rings on the piston rod 32, and the sliding frame 33 can slide between the two limiting rings. When the piston rod 32 slides, it drives the sliding frame 33 to move through the limiting rings on it. The sliding frame 33 is limited and engaged with two adjacent and symmetrically distributed fixing parts 25. Initially, the sliding frame 33 fixes the two adjacent fixing parts 25, so that the two fixing parts 25 form a nozzle. The sliding frame 33 is fixedly connected to a sealing ring 34. The third guide tube 22 and the two adjacent fixing parts 25 are slidably connected to the adjacent sealing ring 34. The sealing ring 34 is used to seal the gap between the third guide tube 22 and the two adjacent fixing parts 25.

[0033] like Figure 7 and Figure 8 As shown, the sliding frame 33 is fixedly connected to two symmetrically distributed sliding rods 4. The sliding rods 4 are slidably connected to adjacent and symmetrically distributed second fixed shells 24. The two ends of the sliding rods 4 pass through the adjacent second fixed shells 24 respectively. The second fixed shell 24 is slidably connected to a limiting plate 41. The limiting plate 41 is sealed to the adjacent fixing member 25. A second spring 42 is fixedly connected between the limiting plate 41 and the adjacent second fixed shell 24. The second spring 42 is used to reset the limiting plate 41 and at the same time keep the limiting plate 41 sealed to the adjacent fixing member 25. The limiting plate 41 is fixedly connected to two symmetrically distributed steel wire ropes 43. Multiple U-shaped plates are fixedly connected to the second fixed shell 24. The second fixed shell 24 guides the adjacent steel wire ropes 43 through the U-shaped plates. The end of the steel wire rope 43 away from the adjacent limiting plate 41 is fixedly connected to the adjacent sliding rod 4.

[0034] When using this device to treat exhaust gas, the operator first starts the water pump 15. The water pump 15 draws water from below the spray housing 11 into the water pump 15 through a pipe. The water in the water pump 15 then flows through the first conduit 16 into the second conduit 17. The water in the second conduit 17 flows into the outlet pipe 2 and then through the outlet pipe 2, the adjacent connecting housing 21, and the adjacent third conduit 22 into the space between two adjacent fixing parts 25. The water is then sprayed out from the nozzles in the two fixing parts 25 to form a water mist.

[0035] After the water mist is sprayed from the two adjacent fixtures 25, the staff introduces the exhaust gas into the air inlet pipe 12. The exhaust gas then enters the annular shell 13 through the air inlet pipe 12. The exhaust gas in the annular shell 13 is sprayed upward through the jet disc 14 and mixes with the water mist from the fixtures 25. The harmful gases in the exhaust gas come into contact with the water mist, and the water mist adsorbs the impurities in the exhaust gas, thus treating the exhaust gas. The treated exhaust gas is discharged through the air outlet pipe 18 on the upper side of the spray shell 11.

[0036] If excessive impurities in the water inside the spray housing 11 cause crystallization, taking one water outlet pipe 2 as an example, during normal use, as water sprays out between the two fixed parts 25, the water passes through the inside of the connecting housing 21 and squeezes the connecting housing 21. Under the pressure of the water, the connecting housing 21 deforms and squeezes the hydraulic oil inside. The hydraulic oil inside the connecting housing 21 enters the piston housing 3 and squeezes the piston rod 32. Figure 6 Taking the direction as an example, when the piston rod 32 moves to the left, during normal use, the piston rod 32 will not drive the sliding frame 33 to move. After the crystals enter between the two fixed parts 25 and block the two fixed parts 25, the pressure in the water outlet pipe 2 and the connecting shell 21 increases instantly, and the connecting shell 21 deforms again. Through the transmission of hydraulic oil, the piston rod 32 continues to move to the left. At this time, the piston rod 32 drives the sliding frame 33 to move to the left. The right end of the sliding frame 33 gradually separates from the two fixed parts 25, and the sealing ring 34 moves synchronously until the sliding frame 33 separates from the two fixed parts 25.

[0037] After the sliding frame 33 disengages from the two fixing members 25, under the impact of water, the two fixing members 25 rotate around their pivot, causing them to open and discharge the blocked crystals. At the same time, the fixing members 25 slide between the two second fixing shells 24. During the rotation of the fixing members 25, the left side of the pivot of the fixing members 25 pushes the crystals in the third conduit 22 to the right. After the crystals are discharged, water sprays out from the fixing members 25, the pressure on the connecting shell 21 is released, the first spring 31 is released at the same time, and squeezes the piston rod 32 to move to the right, squeezing the hydraulic oil into the connecting shell 21. During the movement of the piston rod 32 to the right, it drives the sliding frame 33 to move to the right. The sliding frame 33 squeezes the two fixing members 25, resetting the fixing members 25. At the same time, the sealing ring 34 is reset, sealing the gap between the fixing members 25 and the third conduit 22.

[0038] During the leftward movement of the sliding frame 33, the sliding frame 33 drives the two sliding rods 4 to move to the left. The two sliding rods 4 respectively drive the two adjacent steel wire ropes 43 to move. The steel wire ropes 43 drive the adjacent limiting plate 41 to move, causing the limiting plate 41 to move into the adjacent second fixed shell 24 and squeeze the adjacent second spring 42. The limiting plate 41 stops after it is fully inside the second fixed shell 24 to prevent the limiting plate 41 from blocking the crystal discharge. When the sliding frame 33 resets, the sliding rods 4 reset synchronously. At the same time, the limiting plate 41 resets under the compression of the adjacent second spring 42, and the limiting plate 41 contacts the two fixing parts 25.

[0039] After the exhaust gas is treated, the staff turns off water pump 15 to complete the cleaning of the exhaust gas, and then treats the water.

[0040] Example 2: Based on Example 1, such as Figure 4 and Figure 9 As shown, it also includes a first fixing plate 5. The upper side of the first fixing plate 5 is a conical surface, which spreads outward from bottom to top to guide the water flow on the inner wall of the spray shell 11. The first fixing plate 5 is fixed to the lower part of the spray shell 11. The spray shell 11 is fixed with a second fixing plate 51 and a third fixing plate 52. The first fixing plate 5, the second fixing plate 51, and the third fixing plate 52 are arranged sequentially from top to bottom. The second fixing plate 51 and the third fixing plate 52 are both annular. There are gaps between the first fixing plate 5 and the second fixing plate 51, and there are gaps between the second fixing plate 51 and the third fixing plate 52. Both the second fixing plate 51 and the third fixing plate 52 have holes for draining water from them. Both the second fixing plate 51 and the third fixing plate 52 are provided with features to control whether the holes on them are open or closed. The activated switch assembly has two disc-shaped components 53 fixedly connected and connected to the second conduit 17. The diameter of the upper disc-shaped component 53 is larger than that of the lower disc-shaped component 53. The gap between the first fixing plate 5 and the second fixing plate 51 corresponds to the upper disc-shaped component 53, and the gap between the second fixing plate 51 and the third fixing plate 52 corresponds to the lower disc-shaped component 53. The disc-shaped component 53 consists of two discs and a connecting rod between them. The two discs are connected to the second conduit 17. In use, the water in the second conduit 17 is discharged through the gap between the two discs on the disc-shaped component 53. The water in the second conduit 17 is sprayed out as a circular water curtain through the disc-shaped component 53. The second conduit 17 is fixedly connected to a first arc-shaped plate 54 and a second arc-shaped plate 55. The first arc-shaped plate 54 and the second arc-shaped plate 55 are respectively fixedly connected to the adjacent first fixing shell 23.

[0041] like Figure 9As shown, a motor 56 is fixedly connected to the spray housing 11. The output shaft of the motor 56 is fixedly connected to the second conduit 17. The second conduit 17 and the jet disc 14 are driven by a rubber wheel set. The annular housing 13 is rotatably connected to the jet disc 14. The first conduit 16 is rotatably connected to the second conduit 17. After the motor 56 is started, the output shaft of the motor 56 drives the second conduit 17 to rotate, and drives the jet disc 14 to rotate in the opposite direction relative to the second conduit 17 through the rubber wheel set.

[0042] like Figure 10 As shown, the switch assembly includes a fixing rod 6, which is fixedly connected to the spray shell 11. The fixing rod 6 is slidably connected to an airbag 61 and a sealing plug 62. The airbag 61 and the adjacent sealing plug 62 are fixedly connected. The airbag 61 is located on the upper side of the adjacent sealing plug 62. The lower side of the sealing plug 62 is frustoconical. The holes on the second fixing plate 51 and the third fixing plate 52 are respectively sealed and fitted with the adjacent sealing plug 62. Initially, the sealing plug 62 blocks the holes on the adjacent second fixing plate 51 or the adjacent third fixing plate 52.

[0043] like Figure 11 As shown, a packing shell 7 is fixedly connected to the middle of the spray shell 11. The packing shell 7 is located above the first fixed plate 5. The packing shell 7 is filled with packing material to increase the contact area between the gas and the liquid and slow down the movement of the gas. The packing shell 7 and the packing material inside it can pass through the gas and liquid. A first conical shell 71 is fixedly connected to the lower side of the packing shell 7. The lower side of the packing shell 7 is inclined to guide the water in the packing shell 7 to slide down along the first conical shell 71 and the inner wall of the spray shell 11. The first conical shell 71 is rotatably connected to the adjacent disc-shaped part 53. The space between the first conical shell 71 and the spray shell 11 gradually increases, so that the gas slows down the movement speed when it rises. A cavity is opened in the middle of the packing shell 7. The second conduit 17 is fixedly connected to and connected to two symmetrically distributed first connecting pipes 72. The first connecting pipes 72 are located in the cavity in the middle of the packing shell 7. The upper and lower sides of the first connecting pipes 72 are provided with evenly distributed holes. A second conical shell 73 is fixedly connected to the upper side of the packing shell 7.

[0044] like Figure 11As shown, circumferentially distributed ultrasonic transducers 8 are fixed to the upper side of the second conical shell 73. The ultrasonic transducers 8 are used to agitate water droplets into water mist. Circumferentially distributed guide plates 81 are fixed to the spray shell 11. The ultrasonic transducers 8 are located between adjacent guide plates 81. A second connecting pipe 82 is fixed to and connected to the upper side of the second conduit 17. The second connecting pipe 82 is fixed to and connected to an annular nozzle 83. In use, water enters the annular nozzle 83 from the second conduit 17 through the second connecting pipe 82. The head 83 sprays out droplet-shaped liquid. A rotating component 84 is fixedly connected to the second connecting pipe 82. The rotating component 84 consists of two annular cylinders. A filter screen 85 is fixedly connected to the rotating component 84. The filter screen 85 is fixed to the annular block on the outside of the rotating component 84. The filter screen 85 is used to remove water mist from the gas. A demister 86 is fixedly connected inside the rotating component 84. Activated carbon packing 87 is fixedly connected to the upper side of the spray shell 11. The activated carbon packing 87 is located above the demister 86 and is used to perform final adsorption of impurities in the gas.

[0045] During waste gas treatment, the operator starts the water pump 15 and the motor 56. The water pump 15 fills the second conduit 17 with water, and the output shaft of the motor 56 drives the second conduit 17 to rotate clockwise (from top to bottom), allowing waste gas to enter through the intake pipe 12. As the second conduit 17 rotates, the rubber wheel assembly drives the jet disc 14 to rotate counter-clockwise, causing the gas to rotate counter-clockwise. The second conduit 17 also drives the fixing component 25 to rotate clockwise. The water mist sprayed from the fixing component 25 flows in the opposite direction to the gas flow, creating an impact and increasing mixing efficiency. Simultaneously, the two disc-shaped components 53 spray out circular water curtains. The water curtain sprayed from the upper disc-shaped component 53... The water sprayed from the lower disc-shaped component 53 passes through the gap between the first fixed plate 5 and the second fixed plate 51, and stores water between the second fixed plate 51 and the spray shell 11. The water curtain sprayed from the lower disc-shaped component 53 passes through the gap between the second fixed plate 51 and the third fixed plate 52, and stores water between the third fixed plate 52 and the spray shell 11. At this time, the exhaust gas mixes with the water mist sprayed from the fixed component 25 and moves upward, while also carrying some water mist upward. During the process of the exhaust gas and some water mist passing upward through the water curtain, the water mist merges with the water curtain, preventing the water mist carrying impurities from moving. At the same time, the gas is cleaned again when passing through the water curtain, further reducing impurities in the exhaust gas.

[0046] During the process of the disc-shaped component 53 spraying out a circular water curtain, water continuously accumulates between the third fixed plate 52 and the spray shell 11 and between the second fixed plate 51 and the spray shell 11. Taking the third fixed plate 52 and the spray shell 11 as an example, during the water accumulation process, the airbag 61 gradually rises with the liquid level and drives the sealing plug 62 to move upward. The airbag 61 and the sealing plug 62 slide on the fixed rod 6. The sealing plug 62 gradually separates from the hole on the third fixed plate 52, and then the water is discharged downward from the hole on the third fixed plate 52, so that the liquid on the third fixed plate 52 is kept at a certain height, so that the water forms a circulation, while preventing gas from passing through the hole on the third fixed plate 52.

[0047] As the gas moves upward through the first fixed plate 5, the space gradually increases, slowing down the gas's movement. Simultaneously, the first connecting pipe 72 rotates with the second conduit 17, spraying water onto the packing shell 7 to wet it and the packing material inside. Excess water flows along the bottom of the packing shell 7 towards the inner walls of the first conical shell 71 and the spray shell 11. As the gas passes through the packing shell 7, it mixes again with the water inside, further cleaning impurities from the gas. The gas then continues to move upward, tilting clockwise under the action of the guide plate 81. Meanwhile, the water in the second conduit 17... The water enters the annular nozzle 83 through the second connecting pipe 82, causing the annular nozzle 83 to rotate counterclockwise, making the water fall counterclockwise. The water sprayed from the annular nozzle 83 is in droplet form. At the same time, the ultrasonic transducer 8 is activated, and the water falling from the annular nozzle 83 onto the ultrasonic transducer 8 is atomized into mist. When the gas passes through the guide plate 81, it carries the misty water upward, causing the water droplets on the upper side to collide with the gas and misty water on the lower side, removing impurities from the gas. Then the gas passes through the filter screen 85 and enters the interior of the rotating part 84. When passing through the filter screen 85, the water mist and impurities in the gas are further intercepted.

[0048] After the gas enters the rotating part 84, it passes through the demister 86 and the activated carbon packing 87 in sequence. The demister 86 removes water from the gas, and the activated carbon packing 87 performs final adsorption on the impurities in the gas. Then, the gas is discharged through the outlet pipe 18.

[0049] After the exhaust gas was cleaned up, the staff turned off the water pump 15, motor 56 and ultrasonic transducer 8 to complete the cleaning.

[0050] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A non-clogging waste gas treatment device for the preparation of N-methylpyrrolidone, comprising a support frame (1), a spray shell (11) fixedly connected to the support frame (1), an air inlet pipe (12) fixedly connected to the lower side of the spray shell (11), the air inlet pipe (12) communicating with an annular shell (13) located inside the spray shell (11), the annular shell (13) being provided with a jet disk (14), and the jet disk (14) being provided with a circumferentially connected to the annular shell (13). The spray housing (11) has distributed nozzles, and a water pump (15) is fixedly connected to the outside of the spray housing (11). The inlet of the water pump (15) is connected to the bottom of the spray housing (11) through a pipe, and the outlet of the water pump (15) is connected to a first conduit (16). A second conduit (17) is provided on the first conduit (16). The second conduit (17) is located in the middle of the spray housing (11), and an air outlet pipe (18) is connected to the upper side of the spray housing (11). The spray housing (11) is characterized by: It also includes circumferentially distributed water outlet pipes (2), all of which are fixedly connected to and connected to the second conduit (17). The water outlet pipes (2) are connected to a connecting shell (21), and the connecting shell (21) is connected to a third conduit (22). The third conduit (22) is fixedly connected to a first fixed shell (23), and the first fixed shell (23) is fixedly connected to symmetrically distributed second fixed shells (24). The symmetrically distributed second fixed shells (24) are rotatably connected to each other with symmetrically distributed fixing members (25). The fixing members (25) are sealed and slidably connected to the adjacent second fixed shells (24). An adjustment mechanism for adjusting the position of the adjacent and symmetrically distributed fixing members (25) is provided on the outside of the water outlet pipes (2). The adjusting mechanism includes a piston housing (3), which is fixedly connected to the adjacent water outlet pipe (2). The piston housing (3) is connected to the adjacent connecting shell (21). The connecting shell (21) is filled with hydraulic oil. The piston housing (3) is slidably connected to a piston rod (32). A first spring (31) is fixedly connected between the piston rod (32) and the adjacent piston housing (3). The piston rod (32) is slidably connected to a sliding frame (33). The sliding frame (33) is slidably matched with the adjacent and symmetrically distributed fixing parts (25). The sliding frame (33) is fixedly connected to a sealing ring (34). The third conduit (22) and the adjacent and symmetrically distributed fixing parts (25) are slidably connected to the adjacent sealing ring (34). The sliding frame (33) is fixedly connected with symmetrically distributed sliding rods (4). The sliding rods (4) are slidably connected to the adjacent and symmetrically distributed second fixed shells (24). The second fixed shells (24) are slidably connected to a limiting plate (41). The limiting plate (41) is sealed to the adjacent fixing member (25). A second spring (42) is fixedly connected between the limiting plate (41) and the adjacent second fixed shell (24). The limiting plate (41) is fixedly connected with symmetrically distributed steel wire ropes (43). The end of the steel wire rope (43) away from the adjacent limiting plate (41) is fixedly connected to the adjacent sliding rod (4).

2. The anti-clogging waste gas treatment device for the preparation of N-methylpyrrolidone according to claim 1, characterized in that: It also includes a first fixing plate (5), which is fixed to the spray shell (11). The spray shell (11) is fixed to a second fixing plate (51) and a third fixing plate (52). The first fixing plate (5), the second fixing plate (51) and the third fixing plate (52) are arranged from top to bottom. There is a gap between the first fixing plate (5) and the second fixing plate (51). There is a gap between the second fixing plate (51) and the third fixing plate (52). Both the second fixing plate (51) and the third fixing plate (52) have holes. Both the second fixing plate (51) and the third fixing plate (52) are provided with switch components for controlling whether the holes on them are opened. The second conduit (17) is fixed to and connected to two disc-shaped parts (53). The second conduit (17) is fixed to a first arc plate (54) and a second arc plate (55). The first arc plate (54) and the second arc plate (55) are respectively fixed to the adjacent first fixing shell (23).

3. The anti-clogging waste gas treatment device for the preparation of N-methylpyrrolidone according to claim 2, characterized in that: The second fixing plate (51) and the third fixing plate (52) are both arc-shaped. The gap between the first fixing plate (5) and the second fixing plate (51) corresponds to the adjacent disc-shaped component (53). The gap between the second fixing plate (51) and the third fixing plate (52) corresponds to the adjacent disc-shaped component (53). The disc-shaped component (53) consists of two discs and a connecting rod between them. The two discs are connected to the second conduit (17).

4. The anti-clogging waste gas treatment device for the preparation of N-methylpyrrolidone according to claim 3, characterized in that: The spray shell (11) is fixedly connected to a motor (56), the output shaft of the motor (56) is fixedly connected to the second conduit (17), the second conduit (17) and the jet disc (14) are driven by a rubber wheel set, the annular shell (13) is rotatably connected to the jet disc (14), and the first conduit (16) is rotatably connected to the second conduit (17).

5. The anti-clogging waste gas treatment device for the preparation of N-methylpyrrolidone according to claim 4, characterized in that: The switch assembly includes a fixing rod (6), which is fixed to the spray shell (11). The fixing rod (6) is slidably connected to an airbag (61) and a sealing plug (62). The airbag (61) is fixed to the adjacent sealing plug (62). The airbag (61) is located on the upper side of the adjacent sealing plug (62). The holes on the second fixing plate (51) and the holes on the third fixing plate (52) are respectively sealed to the adjacent sealing plug (62).

6. The anti-clogging waste gas treatment device for the preparation of N-methylpyrrolidone according to claim 5, characterized in that: The spray shell (11) is fixedly connected to a packing shell (7), which is located above the first fixed plate (5). A first conical shell (71) is fixedly connected to the lower side of the packing shell (7). The first conical shell (71) is rotatably connected to the adjacent disc-shaped component (53). The second conduit (17) is fixedly connected to and connected to a symmetrically distributed first connecting pipe (72). The first connecting pipe (72) is located inside the packing shell (7). The upper and lower sides of the first connecting pipe (72) are provided with evenly distributed holes. A second conical shell (73) is fixedly connected to the upper side of the packing shell (7).

7. The anti-clogging waste gas treatment device for the preparation of N-methylpyrrolidone according to claim 6, characterized in that: The upper side of the second conical shell (73) is fixed with circumferentially distributed ultrasonic transducers (8), the spray shell (11) is fixed with circumferentially distributed guide plates (81), the ultrasonic transducers (8) are located between adjacent guide plates (81), the upper side of the second conduit (17) is fixed with and connected to a second connecting pipe (82), the second connecting pipe (82) is fixed with and connected to an annular nozzle (83), the second connecting pipe (82) is fixed with a rotating part (84), the rotating part (84) is fixed with a filter screen (85), the inside of the rotating part (84) is fixed with a demister (86), and the upper side of the spray shell (11) is fixed with activated carbon filler (87).

8. The anti-clogging waste gas treatment device for the preparation of N-methylpyrrolidone according to claim 7, characterized in that: The rotating component (84) consists of two annular cylinders, the filter screen (85) is fixed to the annular block on the outside of the rotating component (84), and the activated carbon packing (87) is located above the demister (86).

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