Adsorption and purification structure for NMP tail gas

Abstract

The invention relates to the technical field of NMP tail gas treatment, and particularly discloses an adsorption and purification structure for NMP tail gas, which comprises a bottom bin, the bottom bin is directly arranged on the bottom surface and is used for containing liquid, the upper part of the bottom bin is connected with a gas inlet section, and a spraying section for spraying is arranged above the gas inlet section; the spiral pipe is spirally arranged in the bottom bin; the air inlet pipe is connected into the air inlet section in a penetrating mode, and the tail end of the air inlet pipe communicates with the top end of the spiral pipe; and one or more of a first connecting section, a second connecting section and a third connecting section are mounted between the bottom bin and the air inlet section. According to the adsorption and purification structure for the NMP tail gas, the NMP tail gas directly spirally and tangentially enters the bottom of water, full fusion of the tail gas and the water is guaranteed through cooperation of the stirring push plate and the honeycomb plate, the bubble influence is reduced, the tail gas adsorption and purification effect is guaranteed, the treatment efficiency is improved, and air pollution is reduced.

Description

Technical Field

[0001] This invention relates to the field of NMP exhaust gas treatment technology, specifically to an adsorption purification structure for NMP exhaust gas. Background Technology

[0002] NMP exhaust gas is a common waste gas containing N-methylpyrrolidone (NMP) in industrial production. It needs to be treated before it is emitted to reduce air pollution. At the same time, the waste gas treatment can also recover NMP. It is generally carried out by spraying for NMP adsorption and purification. For example, patent CN 118846758 B discloses an NMP exhaust gas purification and treatment device. Spray pipes spray water to purify the NMP exhaust gas inside the machine. The purified water falls onto a collection hopper, which collects the purified water. Sweeping blades rotate within the collection hopper to agitate the purified water. The exhaust gas also passes through the discharge end of the collection hopper and comes into contact with the purified water. The exhaust gas is further agitated by the sweeping blades, allowing it to dissolve more fully in the water. After the exhaust gas is sprayed, the water containing NMP exhaust gas is collected and then mixed with the exhaust gas again. This increases the amount of NMP exhaust gas that can be mixed in a single water droplet, enabling rapid purification of the NMP exhaust gas within a shorter contact time with water. This improves water utilization during purification and reduces equipment operating costs. For example, patent CN 218421940 U discloses an NMP production waste gas treatment device, including a base. A purification box and an inclined treatment cylinder are fixedly installed on the top of the base via a bracket. An air inlet pipe is fixedly connected to the top of the treatment cylinder at the end away from the purification box. A liquid inlet pipe is fixedly connected to one end of the heat exchange tube, and a liquid outlet pipe is fixedly connected to the other end of the heat exchange tube. Through holes are evenly opened on the surface of the treatment cylinder. A vent pipe is fixedly connected between the treatment cylinder and the purification box. A pump body is fixedly installed on the outer side of the purification box. This allows the NMP gas to fully contact the heat exchange tube or the guide cylinder. The NMP gas will then condense into water droplets, which will flow into the bottom of the treatment cylinder through the inclined guide cylinder. This facilitates the conversion of most of the NMP gas into a liquid form for recovery, while a small portion of the NMP gas dissolves in the solvent liquid. This effectively absorbs the NMP gas and prevents it from being emitted into the air, causing environmental pollution. While current NMP tail gas adsorption purification processes utilize agitation to increase contact between water and waste gas, agitation in practice easily generates bubbles. Under airflow, some NMP tail gas bubbles rise to the surface, affecting the uniform mixing of the NMP tail gas. Furthermore, as described in the aforementioned patent, agitation is performed the instant the waste gas passes through the accumulator to increase contact, which cannot guarantee the reaction and recovery effect of the NMP tail gas. Therefore, we propose an adsorption purification structure for NMP tail gas to address the aforementioned problems. Summary of the Invention

[0003] The purpose of this invention is to provide an adsorption purification structure for NMP exhaust gas, in order to solve the problem mentioned in the background art that current NMP exhaust gas adsorption purification equipment cannot treat bubbles in the mixing process, which affects the full fusion between NMP exhaust gas and aqueous solution and cannot improve adsorption purification efficiency.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an adsorption purification structure for NMP exhaust gas, comprising: a bottom chamber, the bottom chamber being placed directly on the bottom surface for holding liquid, an air inlet section being connected above the bottom chamber, and a spray section for spraying being provided above the air inlet section, and an air outlet section being provided at the top of the spray section. Also includes: A spiral tube, which is arranged in a spiral shape inside the bottom compartment; An intake pipe is inserted and connected inside the intake section, and the tail end of the intake pipe is connected to the top end of the spiral tube. Among them, one or more of a first connecting section, a second connecting section and a third connecting section are installed between the bottom compartment and the air intake section. The first connecting section, the second connecting section and the third connecting section are respectively rotatably installed with a first push plate, a second push plate and a third push plate that are inclined at different angles, for stirring and mixing the air intake and liquid. The air outlet section is internally arranged with a first swirl plate and a second swirl plate, which are arranged in opposite directions.

[0005] Furthermore: a drain pump is connected to the bottom side of the bottom compartment, a bracket for supporting the spiral tube is vertically fixed inside the bottom of the bottom compartment, the top of the spiral tube is located at the top center of the bottom compartment, and the bottom of the spiral tube has a conical spiral structure.

[0006] Furthermore: a first fixing frame is fixedly installed inside the first connecting section, and a first honeycomb plate is fixedly installed on the top surface of the first fixing frame; The bottom outer side of the first fixed frame is rotatably connected to a first connecting sleeve, the outer side of the first connecting sleeve is fixedly connected to a first outer ring, a first push plate is integrally fixed between the first connecting sleeve and the first outer ring, and an outer gear ring is protruding from the outer side of the first outer ring. The first connecting section has a first connecting shaft rotatably mounted on its inner side, and a transmission gear that meshes with the first outer ring is fixedly mounted on the outer side of the first connecting shaft.

[0007] Furthermore: a second fixing frame is fixedly installed inside the second connecting section, a second honeycomb plate is fixedly installed on the top surface of the second fixing frame, a second connecting sleeve is rotatably connected to the bottom outer side of the second fixing frame, a second outer ring is fixedly connected to the outer side of the second connecting sleeve, a second push plate is integrally fixed between the second connecting sleeve and the second outer ring, an external gear ring is protruding from the outer side of the second outer ring, and a second connecting shaft is rotatably installed on the inner side of the second connecting section.

[0008] Furthermore: a third fixing frame is fixedly installed inside the third connecting section, a third honeycomb plate is fixedly installed on the top surface of the third fixing frame, a third connecting sleeve is rotatably connected to the bottom outer side of the third fixing frame, a third outer ring is fixedly connected to the outer side of the third connecting sleeve, a third push plate is integrally fixed between the third connecting sleeve and the third outer ring, an external gear ring is protruding from the outer side of the third outer ring, and a third connecting shaft is rotatably installed on the inner side of the third connecting section.

[0009] Furthermore: both the second and third connecting shafts are equipped with transmission gears on their sides, and the third connecting shaft, the second connecting shaft, and the first connecting shaft are correspondingly engaged and plugged into each other. The top end of the third connecting shaft is connected to a drive shaft that is rotatably mounted on the inner wall of the intake section. The top end of the drive shaft is connected to a bevel gear, and the outer side of the bevel gear is connected to a drive motor located on the side of the intake section.

[0010] Furthermore, a connecting pipe for connecting the spiral tube and the intake pipe is inserted in the middle of the first connecting section, the second connecting section and the third connecting section, and the two ends of the connecting pipe are engaged and connected to each other.

[0011] Furthermore, the tilt angles between the first push plate, the second push plate, and the third push plate decrease sequentially.

[0012] Furthermore, the spray section has two sets of spray pipes vertically separated inside, with an inlet pipe connected to the outside of the spray pipe and a liquid pump connected to the bottom of the inlet pipe.

[0013] Furthermore: a mounting bracket is fixedly installed inside the air outlet section, and the first swirl plate and the second swirl plate are rotatably installed on the bottom outer side of the mounting bracket. A demisting plate is rotatably installed inside the first swirl plate and the second swirl plate at equal angles, and the upper and lower sides of the demisting plate are bent and rolled outwards.

[0014] Compared with the prior art, the present invention has at least the following beneficial effects: the adsorption and purification structure for NMP exhaust gas directly spirals and tangentially enters the bottom of the water, and the stirring pusher plate and honeycomb plate ensure the full fusion of exhaust gas and water, reduce the influence of bubbles, ensure the adsorption and purification effect of exhaust gas, improve the treatment efficiency, and reduce air pollution. 1. This solution includes a bottom chamber and a spiral tube. The bottom of the spiral tube is tapered and spirally inserted into the bottom of the bottom chamber. NMP exhaust gas enters the bottom of the bottom chamber tangentially through the spiral tube, forming a vortex at the bottom of the bottom chamber. This prevents the NMP exhaust gas from directly forming bubbles and being discharged upwards after entering the bottom chamber, thereby extending the contact time between the NMP exhaust gas and water. 2. This solution includes a first connecting section, a second connecting section, and a third connecting section. The interior of the first connecting section, the second connecting section, and the third connecting section is equipped with a first honeycomb plate with a gradually decreasing aperture, which can cause the bubbles to burst when they rise, thus ensuring sufficient contact between the NMP exhaust gas and the water. Meanwhile, by rotating the first, second, and third push plates, water is pushed, accelerating the mixing of NMP exhaust gas and water. Furthermore, by using their different tilt angles, bubbles of different sizes can be formed inside the first, second, and third connecting sections. The hydrophobicity of the bubbles can be used to accelerate the purification efficiency of NMP exhaust gas by water. 3. This solution is equipped with a first swirl plate and a second swirl plate. The demisting plate is fixed inside the first swirl plate and the second swirl plate at equal angles. By installing the demisting plate at an angle and designing the rolled edges on its sides, it can block the water mist inside the air flowing up and down. The rolled edges also cause the water mist to form water droplets and fall down, reducing the humidity when the air is discharged, so as to facilitate subsequent processing. 4. This solution includes spiral plates. The spiral plates are evenly distributed at the top of the air intake section. Through their spiral structure and the spacing between their individual units, the sprayed water flows downward through the gaps in the spiral plates, while air flows upward through the gaps. This ensures that the water comes into contact with the NMP exhaust gas, thus guaranteeing the purification effect. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1This is a schematic diagram of the overall front structure of the present invention; Figure 2 This is a schematic diagram of the reverse side cross-section of the present invention; Figure 3 This is a schematic diagram of the overall cross-sectional structure of the present invention; Figure 4 This is a schematic diagram of the overall internal structure of the bottom compartment of the present invention; Figure 5 This is a bottom-view schematic diagram of the overall structure of the air intake section of the present invention; Figure 6 This is a schematic diagram of the overall structure of the spiral plate of the present invention; Figure 7 This is a top view of the disassembled first connecting segment, second connecting segment, and third connecting segment of the present invention; Figure 8 This is a bottom view diagram showing the disassembled structure of the first connecting segment, the second connecting segment, and the third connecting segment of the present invention; Figure 9 This is a schematic diagram of the internal disassembly structure of the second connecting segment of the present invention; Figure 10 This is a schematic diagram of the connection structure of the first connecting shaft, the second connecting shaft, and the third connecting shaft of the present invention; Figure 11 This is a top view of the overall structure of the spray section of the present invention; Figure 12 This is a top view of the disassembled mounting frame, first swirl plate, and second swirl plate of the present invention. Figure 13 This is a cross-sectional view of the first and second swirl plates of the present invention. Figure 14 This is a schematic diagram of the overall structure of the defogging plate of the present invention.

[0016] In the diagram: 1. Bottom compartment; 11. Drain pump; 12. Spiral tube; 13. Support; 2. Air inlet section; 21. Air inlet pipe; 22. Drive shaft; 23. Bevel gear; 24. Drive motor; 25. Spiral plate; 3. First connecting section; 31. First honeycomb panel; 32. First fixing frame; 33. First connecting sleeve; 34. First push plate; 35. First outer ring; 36. First connecting shaft; 37. Transmission gear; 38. Connecting pipe; 4. Second connecting section; 41. Second honeycomb panel; 42. 43. Second fixed frame; 44. Second connecting sleeve; 45. Second push plate; 46. Second outer ring; 57. Second connecting shaft; 68. Third connecting section; 59. Third honeycomb panel; 50. Third fixed frame; 51. Third connecting sleeve; 52. Third push plate; 53. Third outer ring; 54. Third connecting shaft; 55. Spray section; 61. Spray pipe; 62. Liquid inlet pipe; 63. Liquid delivery pump; 74. Air outlet section; 75. Mounting bracket; 76. First swirl plate; 77. Second swirl plate; 78. Demister plate. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0018] Please see Figures 1-14 The present invention provides the following technical solution: An adsorption purification structure for NMP exhaust gas includes: a bottom chamber 1, a drain pump 11, a spiral tube 12, a support 13, an air inlet section 2, an air inlet pipe 21, a drive shaft 22, a bevel gear 23, a drive motor 24, a spiral plate 25, a first connecting section 3, a first honeycomb plate 31, a first fixing frame 32, a first connecting sleeve 33, a first push plate 34, a first outer ring 35, a first connecting shaft 36, a transmission gear 37, a connecting pipe 38, a second connecting section 4, and a second honeycomb plate. The components include: a honeycomb plate 41, a second fixing frame 42, a second connecting sleeve 43, a second push plate 44, a second outer ring 45, a second connecting shaft 46, a third connecting section 5, a third honeycomb plate 51, a third fixing frame 52, a third connecting sleeve 53, a third push plate 54, a third outer ring 55, a third connecting shaft 56, a spray section 6, a spray pipe 61, a liquid inlet pipe 62, a liquid delivery pump 63, an air outlet section 7, a mounting frame 71, a first swirl plate 72, a second swirl plate 73, and a demister plate 74. Among them: such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 In the middle, the bottom chamber 1 is placed directly on the bottom surface for liquid storage. The bottom chamber 1 is connected to the air inlet section 2, and the air inlet section 2 is provided with a spray section 6 for spraying. The top of the spray section 6 is provided with an air outlet section 7. The spiral tube 12 is spirally arranged inside the bottom chamber 1. The air intake pipe 21 is inserted and connected inside the air intake section 2. The tail end of the air intake pipe 21 is connected to the top end of the spiral tube 12. The bottom side of the bottom chamber 1 is connected to the drain pump 11. The bottom of the bottom chamber 1 is vertically fixed with a bracket 13 for supporting the spiral tube 12. The top end of the spiral tube 12 is located at the top center of the bottom chamber 1. The bottom of the spiral tube 12 has a conical spiral structure. The top of the inner side of the air intake section 2 is fixedly installed with a spiral plate 25. The spiral plate 25 is set at an equal angle at the top of the air intake section 2 and has a spiral structure.

[0019] In specific application scenarios, NMP exhaust gas is introduced through the intake pipe 21. The introduced NMP exhaust gas connects to the spiral tube 12 via the intake pipe 21. Utilizing the conical spiral structure at the bottom of the spiral tube 12, the NMP exhaust gas tangentially enters the bottom of the bottom chamber 1, allowing contact between the NMP exhaust gas and the aqueous solution inside the bottom chamber 1. The spiral tangential entry of the NMP exhaust gas creates a vortex at the bottom of the bottom chamber 1, causing the incoming NMP exhaust gas to rotate and slowing its ascent time. This increases the contact time between the water and the NMP exhaust gas, ensuring the adsorption and purification of the exhaust gas and reducing the impact of a large number of bubbles generated when the NMP exhaust gas enters. To ensure purification, the rising air enters the interior of the intake section 2 and then enters the interior of the spray section 6 through the gaps between the spiral plates 25 set at the top of the inner side of the intake section 2. After completing the spray purification inside the spray section 6, it is discharged through the exhaust section 7. The water that has been sprayed onto the surface of the spiral plates 25 directly falls onto the surface of the spiral plates 25 and flows downward through the gaps between the spiral plates 25, so that the water comes into contact with the NMP exhaust gas. At the same time, the spiral structure of the spiral plates 25 and the coverage between their individual units can reduce the rise of NMP exhaust gas bubbles, so that the NMP exhaust gas can be completely in contact with the water for adsorption and purification.

[0020] The above technical solution can automatically extend the contact time between NMP exhaust gas and water by using spiral tangential air intake, reduce the influence of bubbles, ensure complete contact between NMP exhaust gas and water, and improve the adsorption and purification efficiency of NMP exhaust gas.

[0021] Among them: such as Figure 3 , Figure 7 , Figure 8 , Figure 9 and Figure 10 In the middle, one or more of the first connecting section 3, the second connecting section 4, and the third connecting section 5 are installed between the bottom compartment 1 and the air intake section 2. The first connecting section 3, the second connecting section 4, and the third connecting section 5 are respectively rotatably installed with a first push plate 34, a second push plate 44, and a third push plate that are inclined at different angles, for stirring and mixing the air intake and liquid. The first connecting section 3 is fixedly installed with a first fixed frame 32. The top surface of the first fixed frame 32 is fixedly provided with a first honeycomb plate 31. The bottom outer side of the first fixed frame 32 is rotatably connected with a first connecting sleeve 33. The outer side of the first connecting sleeve 33 is fixedly connected with a first outer ring 35. The first push plate 34 is integrally fixed between the first connecting sleeve 33 and the first outer ring 35. The outer side of the first outer ring 35 is provided with an external gear ring protruding. The inner side of the first connecting section 3 is rotatably installed with a first connecting shaft 36. The outer side of the first connecting shaft 36 is fixedly installed with a transmission gear 37 that meshes with the first outer ring 35. The second connecting section 4 is internally fixedly equipped with a second fixing frame 42. The top surface of the second fixing frame 42 is fixedly provided with a second honeycomb plate 41. The bottom outer side of the second fixing frame 42 is rotatably connected with a second connecting sleeve 43. The outer side of the second connecting sleeve 43 is fixedly connected with a second outer ring 45. A second push plate 44 is integrally fixed between the second connecting sleeve 43 and the second outer ring 45. An external gear ring is protruding from the outer side of the second outer ring 45. The inner side of the second connecting section 4 is rotatably equipped with a second connecting shaft 46. The third connecting section 5 is internally fixedly equipped with a third fixing frame 52. The top surface of the third fixing frame 52 is fixedly provided with a third honeycomb plate 51. The bottom outer side of the third fixing frame 52 is rotatably connected with a third connecting sleeve 53. The outer side of the third connecting sleeve 53 is fixedly connected with a third outer ring 55. A third push plate 54 is integrally fixed between the third connecting sleeve 53 and the third outer ring 55. An external gear ring is protruding from the outer side of the third outer ring 55. The inner side of the third connecting section 5 is rotatably equipped with a third connecting shaft 56. Transmission gears 37 are installed on the sides of the second connecting shaft 46 and the third connecting shaft 56. The third connecting shaft 56, the second connecting shaft 46 and the first connecting shaft 36 are correspondingly engaged and plugged in. The top end of the third connecting shaft 56 is connected to a drive shaft 22 that is rotatably mounted on the inner wall of the intake section 2. The top end of the drive shaft 22 is connected to a bevel gear 23. The outer side of the bevel gear 23 is connected to a drive motor 24 located on the side of the intake section 2. A connecting pipe 38 for connecting the spiral tube 12 and the intake pipe 21 is inserted in the middle of the first connecting section 3, the second connecting section 4 and the third connecting section 5. The two ends of the connecting pipe 38 are engaged and connected. The inclination angle between the first push plate 34, the second push plate 44 and the third push plate 54 decreases in sequence.

[0022] In specific application scenarios, one or more of the following can be set between the bottom compartment 1 and the air intake section 2: a first connecting section 3, a second connecting section 4, and a third connecting section 5. For example, when the first connecting section 3 is set, a connecting pipe 38 is fixed in the middle of the interior of the first connecting section 3 to connect the spiral pipe 12 and the air intake pipe 21 for air intake. Simultaneously, the drive shaft 22, rotatably mounted on the inner wall of the air intake section 2, directly engages with the first connecting shaft 36, rotatably mounted on the inner wall of the first connecting section 3. Their engaging ends are interlocked, and a polygonal column is provided internally to ensure transmission. During NMP exhaust gas treatment, the drive shaft 22 and the first connecting shaft 36 are driven synchronously by a drive motor 24 connected to a bevel gear 23. The transmission gear 37, integrally fixed to the outer bottom of the first connecting shaft 36, interacts with the first outer ring. The meshing of the external gear rings protruding from the sidewall of 35 drives the first outer ring 35, the first push plate 34 and the first connecting sleeve 33 to rotate outside the first fixed frame 32. The first push plate 34 pushes the water. When the first push plate 34 rotates along the spiral direction of the spiral tube 12, it increases the vortex speed of the water at the bottom and slows down the upward escape speed of NMP exhaust gas. When the first push plate 34 rotates in the opposite direction to the spiral direction of the spiral tube 12, it will impact the vortex and cause a large amount of water to surge inside the bottom chamber 1, forming a large number of bubbles and bursting, which accelerates the mixing and contact of NMP exhaust gas with water and ensures the adsorption and purification of NMP exhaust gas. At the same time, the first honeycomb plate 31 is fixed on the top of the inner side of the first connecting section 3, which can reduce the bubbles that float up and down, making the bubbles smaller and allowing the NMP exhaust gas to come into complete contact with the water. Furthermore, by adding a second connecting section 4 or a third connecting section 5 to the first connecting section 3, the contact time between NMP exhaust gas and water can be extended. At the same time, when the second connecting section 4 and the third connecting section 5 are set, the second connecting shaft 46 and the third connecting shaft 56 inside them will be engaged with the drive shaft 22 and the first connecting shaft 36 respectively. The second connecting shaft 46 and the third connecting shaft 56 will mesh with the second outer ring 45 and the third outer ring 55 respectively through the transmission gear 37 fixed on their outer sides, so as to push the second push plate 44 and the third push plate 54 with water. The second push plate 44 and the third push plate 54 have different inclination angles, which can avoid the formation of large air bubbles inside the second connecting section 4 and the third connecting section 5, so as to ensure the adsorption and purification of NMP exhaust gas.

[0023] The above technical solution facilitates the pushing or impacting of vortices through the pusher plate, prolongs the contact time or mixing efficiency between NMP exhaust gas and water, reduces the influence of bubbles, and ensures the adsorption and purification effect of NMP exhaust gas.

[0024] Among them: such as Figure 3 , Figure 11 , Figure 12 , Figure 13 and Figure 14In the spray section 6, two sets of spray pipes 61 are vertically separated inside. The outside of the spray pipes 61 are connected to the liquid inlet pipes 62, and the bottom end of the liquid inlet pipes 62 is connected to the liquid delivery pump 63. The inside of the air outlet section 7 is fixedly installed with a mounting frame 71. The first swirl plate 72 and the second swirl plate 73 are rotatably installed on the bottom outside of the mounting frame 71. The first swirl plate 72 and the second swirl plate 73 are arranged in opposite directions. Inside the first swirl plate 72 and the second swirl plate 73, a demister plate 74 is rotatably installed at an equal angle. The upper and lower sides of the demister plate 74 are bent and rolled outward.

[0025] In specific application scenarios, purified water is introduced through the liquid pump 63, and spray purification is carried out by connecting the vertically separated spray pipes 61 through the liquid inlet pipe 62, ensuring full coverage of NMP exhaust gas for adsorption and purification. The purified NMP exhaust gas is discharged through the exhaust section 7. After entering the exhaust section 7, the purified gas first contacts the first swirl plate 72 and the second swirl plate 73, and then contacts the inclined demister plate 74 inside the gas. The gas rises and causes the first swirl plate 72 and the second swirl plate 73 to rotate, or the first swirl plate 72 and the second swirl plate 73 can be directly driven to rotate by a motor. After the demister plate 74 contacts the gas, its inclined surface contacts the water mist in the gas. Through the centrifugal action of the rotation of the demister plate 74 and the rolled edge design of the sides of the demister plate 74, the water mist can be condensed into water droplets, which drip downwards through centrifugal force.

[0026] The above technical solution can automatically defog and reduce the humidity of the exhaust air, thereby reducing the need for subsequent processing steps.

[0027] Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention; the contents not described in detail in this specification belong to the prior art known to those skilled in the art; in addition, the directional terms such as up, down, left, right, front, and back in the text only represent their relative positions and not absolute positions.

[0028] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0029] 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. An adsorption purification structure for NMP exhaust gas, comprising: Bottom chamber (1), the bottom chamber (1) is placed directly on the bottom surface for liquid storage, the bottom chamber (1) is connected to an air inlet section (2), and a spray section (6) for spraying is provided above the air inlet section (2), and an air outlet section (7) is provided at the top of the spray section (6). Its characteristic is that it further includes: Spiral tube (12), which is arranged in a spiral shape inside the bottom compartment (1); An air intake pipe (21) is inserted into the interior of the air intake section (2), and the tail end of the air intake pipe (21) is connected to the top end of the spiral tube (12). Among them, one or more of the first connecting section (3), the second connecting section (4) and the third connecting section (5) are installed between the bottom compartment (1) and the air intake section (2). The first connecting section (3), the second connecting section (4) and the third connecting section (5) are respectively rotatably installed with a first push plate (34), a second push plate (44) and a second push plate (54) that are inclined at different angles, for stirring and mixing the air intake and liquid. The air outlet section (7) is internally arranged with a first swirl plate (72) and a second swirl plate (73), which are arranged in opposite directions.

2. The adsorption purification structure for NMP exhaust gas according to claim 1, characterized in that: A drain pump (11) is connected to the bottom side of the bottom chamber (1). A bracket (13) for supporting the spiral tube (12) is vertically fixed inside the bottom of the bottom chamber (1). The top of the spiral tube (12) is located at the top center of the bottom chamber (1). The bottom of the spiral tube (12) has a conical spiral structure.

3. The adsorption purification structure for NMP exhaust gas according to claim 1, characterized in that: The first connecting section (3) is fixedly installed with a first fixing frame (32), and the top surface of the first fixing frame (32) is fixedly provided with a first honeycomb plate (31). The bottom outer side of the first fixed frame (32) is rotatably connected to a first connecting sleeve (33), and the outer side of the first connecting sleeve (33) is fixedly connected to a first outer ring (35). A first push plate (34) is integrally fixed between the first connecting sleeve (33) and the first outer ring (35), and an outer gear ring is protruding from the outer side of the first outer ring (35). The first connecting section (3) has a first connecting shaft (36) rotatably mounted on its inner side, and a transmission gear (37) that meshes with the first outer ring (35) is fixedly mounted on the outer side of the first connecting shaft (36).

4. The adsorption purification structure for NMP exhaust gas according to claim 3, characterized in that: The second connecting section (4) is internally fixedly equipped with a second fixing frame (42), the top surface of the second fixing frame (42) is fixedly provided with a second honeycomb plate (41), the bottom outer side of the second fixing frame (42) is rotatably connected with a second connecting sleeve (43), the outer side of the second connecting sleeve (43) is fixedly connected with a second outer ring (45), the second connecting sleeve (43) and the second outer ring (45) are integrally fixed with a second push plate (44), the outer side of the second outer ring (45) is provided with an outer gear ring, and the inner side of the second connecting section (4) is rotatably equipped with a second connecting shaft (46).

5. The adsorption purification structure for NMP exhaust gas according to claim 4, characterized in that: The third connecting section (5) is internally fixedly installed with a third fixing frame (52), the top surface of the third fixing frame (52) is fixedly provided with a third honeycomb plate (51), the bottom outer side of the third fixing frame (52) is rotatably connected with a third connecting sleeve (53), the outer side of the third connecting sleeve (53) is fixedly connected with a third outer ring (55), the third connecting sleeve (53) and the third outer ring (55) are integrally fixed with a third push plate (54), the outer side of the third outer ring (55) is provided with an external gear ring, and the inner side of the third connecting section (5) is rotatably installed with a third connecting shaft (56).

6. The adsorption purification structure for NMP exhaust gas according to claim 5, characterized in that: The second connecting shaft (46) and the third connecting shaft (56) are both equipped with transmission gears (37). The third connecting shaft (56), the second connecting shaft (46) and the first connecting shaft (36) are correspondingly engaged and plugged in. The top end of the third connecting shaft (56) is connected to a drive shaft (22) that is rotatably mounted on the inner wall of the air intake section (2). The top end of the drive shaft (22) is connected to a bevel gear (23). The outer side of the bevel gear (23) is connected to a drive motor (24) located on the side of the air intake section (2).

7. The adsorption purification structure for NMP exhaust gas according to claim 1, characterized in that: The first connecting section (3), the second connecting section (4) and the third connecting section (5) are interspersed with connecting pipes (38) for connecting the spiral tube (12) and the air inlet pipe (21), and the two ends of the connecting pipes (38) are engaged and connected to each other.

8. The adsorption purification structure for NMP exhaust gas according to claim 5, characterized in that: The tilt angles between the first push plate (34), the second push plate (44), and the third push plate (54) decrease sequentially.

9. The adsorption purification structure for NMP exhaust gas according to claim 1, characterized in that: The spray section (6) has two sets of spray pipes (61) vertically separated inside. The outside of the spray pipe (61) is connected to the liquid inlet pipe (62), and the bottom end of the liquid inlet pipe (62) is connected to the liquid delivery pump (63).

10. The adsorption purification structure for NMP exhaust gas according to claim 1, characterized in that: An installation frame (71) is fixedly installed inside the air outlet section (7). The first swirl plate (72) and the second swirl plate (73) are rotatably installed on the bottom outer side of the installation frame (71). A demisting plate (74) is rotatably installed inside the first swirl plate (72) and the second swirl plate (73) at equal angles. The upper and lower sides of the demisting plate (74) are bent and rolled outwards.

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