Tail gas absorption tower for potassium fluoride production

Abstract

The invention discloses a tail gas absorption tower for potassium fluoride production, and relates to the technical field of absorption towers, the absorption tower comprises a tower body, the bottom of the tower body is provided with a gas inlet pipe and a water discharge pipe, the tower body is internally provided with a spraying assembly and a filtering assembly, the spraying assembly comprises a supporting part and a spraying part, the supporting part comprises a supporting disc, the middle of the supporting disc is provided with a corrugated pipe, and the corrugated pipe is connected with the filtering assembly. When high-concentration tail gas is detected, the density and the coverage range of spraying liquid are increased and the contact reaction efficiency of absorption liquid and the tail gas is improved by rapidly extending and slowly shrinking the air cylinder, and through cooperation of an electric telescopic rod and a movable plate, the high-concentration tail gas can be effectively absorbed. The first wedge-shaped block and the second wedge-shaped block control the movable plate to vibrate at high frequency and crush blockages, and meanwhile, high-pressure spraying is matched, so that the problem that airflow resistance is increased due to blockage is avoided, and long-term stable operation of tail gas treatment equipment is kept.

Description

Technical Field

[0001] This invention relates to the field of absorption tower technology, specifically to a tail gas absorption tower for potassium fluoride production. Background Technology

[0002] The production of potassium fluoride generates exhaust gas containing harmful substances. If this exhaust gas is discharged directly without treatment, it will cause serious environmental pollution. Therefore, it is necessary to use an absorption tower to effectively absorb and purify this exhaust gas. Current exhaust gas absorption towers use a spraying component to spray the absorbent liquid into the tower, and the absorbent liquid reacts with the exhaust gas to achieve the purpose of purifying the exhaust gas.

[0003] Chinese patent application number CN202410594121.7 discloses a spray tower with an air inlet on one side of the bottom and an air outlet at the top. The pump body and spray pipes are located outside the tower. A packing layer is located inside the tower, dividing it into multiple filtration chambers. Each spray layer corresponds to one filtration chamber. A filter assembly is located on the inner wall of the tower below the bottom packing layer. The filtered liquid flows into the bottom of the tower. A water collection structure is provided on the grid plate to collect the liquid falling from above. The water collection structure supplies the liquid to be filtered to the filter assembly. However, in actual use, when the exhaust gas concentration is high, the spray system cannot provide enough absorbent liquid to fully react with the exhaust gas per unit time. This results in some exhaust gas not fully reacting with the absorbent liquid and being discharged into the atmosphere, still causing considerable harm to the environment.

[0004] In addition, impurities in the exhaust gas can clog the filter components, increasing airflow resistance and affecting the flow efficiency of the exhaust gas during the exhaust gas treatment process, thus reducing the treatment efficiency of the absorption tower.

[0005] Therefore, a tail gas absorption tower for potassium fluoride production is proposed to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to disclose a tail gas absorption tower for potassium fluoride production, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solution: a tail gas absorption tower for potassium fluoride production, comprising a tower body, wherein an inlet pipe and a drain pipe are provided at the bottom of the tower body, and a spray assembly and a filter assembly are provided inside the tower body; The spray assembly includes a support part and a spray part. The support part includes a support plate, a corrugated pipe in the middle of the support plate, a water inlet pipe at the top of the corrugated pipe, and a cylinder at the bottom of the support plate. The spray part includes a water spray pipe, the telescopic end of the cylinder is fixedly connected to the water spray pipe, the top of the water spray pipe is connected to the bottom of the corrugated pipe, a branch pipe is provided at the bottom of the water spray pipe, and a nozzle assembly is provided at the bottom of the branch pipe. The filter assembly includes a support base with a through hole in the middle. The through hole contains a packing part, which includes a base plate, a support frame, and a movable plate. The base plate has electric telescopic rods at both ends, and the telescopic ends of the electric telescopic rods have first wedge blocks. The support frame has openings on both sides, and the movable plate has second wedge blocks at both ends. The end of the second wedge block away from the movable plate passes through the opening and corresponds to and cooperates with the first wedge block.

[0008] Optionally, the bottom of the tower body is provided with a drain pipe, one side of the support plate is provided with a support plate, the support plate is connected to a fixing ring through the support plate, the outer side of the fixing ring is fixedly connected to the tower body, the telescopic end of the cylinder is provided with an annular seat, the cylinder is fixedly connected to the top of the water spray pipe through the annular seat, the top of the tower body is provided with an exhaust port, and a demister is provided inside the tower body near the exhaust port.

[0009] Optionally, the water spray pipe is located at the bottom of the annular seat, the end of the water inlet pipe away from the corrugated pipe passes through the tower body, and the end of the drain pipe away from the tower body is connected to the circulation pool through the circulation pipe. The circulation pool is used to store the absorbent liquid after reacting with the exhaust gas. The circulation pool is equipped with a replenishment pipe. Based on the detection results of the absorbent liquid in the circulation pool, the absorbent liquid is appropriately replenished or regenerated in the circulation pool.

[0010] Optionally, the branch pipe is provided with a cover, the nozzle assembly includes a connecting cylinder, the inside of the connecting cylinder is provided with a high-pressure nozzle and a spray nozzle, the cover includes an upper cover and a lower cover, and the upper cover and the lower cover are fixedly connected by an elastic ring.

[0011] Optionally, the spray head is located below the high-pressure nozzle, the connecting cylinder is slidably connected to the high-pressure nozzle, a limiting groove is formed inside the connecting cylinder, a slider is provided on the outside of the high-pressure nozzle, the slider and the limiting groove are correspondingly engaged, the spray head and the connecting cylinder are fixedly connected, a spring is provided on the top of the spray head, the top of the spring is fixedly connected to the bottom of the high-pressure nozzle, and the output end of the high-pressure nozzle is correspondingly inserted into the input end of the spray head.

[0012] Optionally, the top of the support base is curved, the bottom of the bearing frame is fixedly connected to the top of the base plate, gaps are left between the two ends of the movable plate and the inner sides of the two ends of the bearing frame, an elastic pad is provided inside the opening, and the end of the second wedge block away from the movable plate passes through the elastic pad.

[0013] Optionally, the top of the support frame, the middle of the bottom plate, and the movable plate are all filter screen layers.

[0014] Optionally, the top of the support frame is provided with a gas flow rate sensor, the inside of the support frame is filled with filler balls, the top of the connecting cylinder is provided with an internal thread, the bottom of the branch pipe is provided with an external thread, the connecting cylinder is threadedly connected to the branch pipe, and the longitudinal section of the cover is trapezoidal.

[0015] Optionally, the bottom of the lower cover is lower than the bottom of the connecting cylinder, multiple branch pipes are provided, the distance between two adjacent branch pipes is equal, and multiple sets of spraying components and filtering components are arranged at equal intervals inside the tower.

[0016] The technical effects and advantages of this invention are as follows: 1. When high-concentration exhaust gas is detected, this invention rapidly extends the cylinder, causing the annular seat to move the water spray pipe and hood downwards quickly and short distances. This slows down the upward flow of the high-concentration exhaust gas through the support frame. When the cylinder slowly contracts, the hood exerts less upward attraction on the high-concentration exhaust gas, preventing the hood from accelerating its upward flow. This results in a higher density of absorbent droplets at the bottom of the hood per unit time, improving the contact reaction efficiency between the absorbent and the exhaust gas. By adjusting the horizontal height of the spray assembly, the coverage area of ​​the spray liquid within the tower is increased, optimizing the contact reaction efficiency between the spray liquid and the exhaust gas. This prevents some exhaust gas from being discharged into the atmosphere before fully reacting with the absorbent liquid, thus avoiding environmental pollution.

[0017] 2. The electric telescopic rod of the present invention drives the movable plate to move up and down repeatedly through the first wedge block and the second wedge block, so that the vertical plate repeatedly contacts and impacts the top of the bearing frame. The movable plate generates high-frequency vibration, which quickly breaks up the blockage in the gap of the packing balls. At the same time, in conjunction with high-pressure spraying, the problem of increased airflow resistance caused by blockage is avoided, and the long-term stable operation of the exhaust gas treatment equipment is maintained. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the tower structure of the present invention; Figure 2 This is a schematic diagram of the structure of the spray assembly and filter assembly of the present invention; Figure 3 This is a schematic diagram of the spray assembly structure of the present invention; Figure 4 This is a schematic diagram of the connection structure between the branch pipe and the nozzle assembly of the present invention; Figure 5 This is a schematic diagram of the connection structure between the branch pipe and the cover body of the present invention; Figure 6 This is a schematic diagram of the internal structure of the connecting cylinder of the present invention; Figure 7 This is a schematic diagram of the connection structure between the support base and the packing part of the present invention; Figure 8 This is a schematic diagram of the bottom structure of the base plate of the present invention; Figure 9 This is a schematic diagram of the internal structure of the support base of the present invention; Figure 10 For the present invention Figure 9 A magnified schematic diagram of the structure in area A; Figure 11 This is a schematic diagram of the connection structure between the support frame and the movable plate of the present invention.

[0019] In the diagram: 1. Tower body; 101. Air inlet pipe; 102. Sewage pipe; 103. Drain pipe; 104. Exhaust port; 2. Spray assembly; 201. Water inlet pipe; 202. Fixing ring; 204. Support plate; 205. Support plate; 206. Cylinder; 2061. Annular seat; 207. Corrugated pipe; 208. Water spray pipeline; 209. Branch pipe; 210. Cover; 2101. Upper cover; 2102. Elastic ring; 2103. Lower cover; 211. Spray head assembly; 2111. Connecting cylinder; 2 112. High-pressure nozzle; 2113. Limiting groove; 2114. Slider; 2115. Spray head; 2116. Spring; 3. Filter assembly; 301. Support base; 3011. Curved surface; 3012. Through hole; 302. Packing part; 3021. Base plate; 30211. Electric telescopic rod; 30212. First wedge block; 3022. Bearing frame; 30221. Movable plate; 30222. Opening; 30223. Second wedge block; 30224. Elastic pad; 30225. Vertical plate. Detailed Implementation

[0020] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0021] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0022] Example 1 Please see Figure 1-11This embodiment discloses a tail gas absorption tower for potassium fluoride production, including a tower body 1. The bottom of the tower body 1 is provided with an air inlet pipe 101 and a drain pipe 103. The interior of the tower body 1 is provided with a spray assembly 2 and a filter assembly 3. The absorbent that reacts with the tail gas is continuously sprayed and transported into the tower body 1 through the spray assembly 2. The tail gas entering the tower body 1 is pre-filtered and initially purified through the filter assembly 3.

[0023] The bottom of the tower body 1 is provided with a drain pipe 102, through which the sludge and impurities deposited at the bottom of the tower body 1 are discharged to the outside. The top of the tower body 1 is provided with an exhaust port 104, and a demister is provided inside the tower body 1 near the exhaust port 104.

[0024] The spray assembly 2 includes a support section and a spray section. The support section includes a support plate 205, with a support plate 204 on one side. A fixing ring 202 is connected to the support plate 205 via the support plate 204. The outer side of the fixing ring 202 is fixedly connected to the tower body 1. A corrugated pipe 207 is provided in the middle of the support plate 205, and a water inlet pipe 201 is provided at the top of the corrugated pipe 207. A cylinder 206 is provided at the bottom of the support plate 205. The spray section includes a water spray pipe 208. An annular seat 2061 is provided at the telescopic end of the cylinder 206. 8 is located at the bottom of the annular seat 2061. The cylinder 206 is fixedly connected to the top of the water spray pipe 208 through the annular seat 2061. The top of the water spray pipe 208 is connected to the bottom of the corrugated pipe 207. The bottom of the water spray pipe 208 is provided with a branch pipe 209. The bottom of the branch pipe 209 is provided with a nozzle assembly 211. By extending and retracting the cylinder 206, the annular seat 2061 controls the horizontal height of the cover 210 and the nozzle assembly 211, and adjusts the distance between the nozzle assembly 211 and the support frame 3022 in the initial state.

[0025] The end of the water inlet pipe 201 away from the corrugated pipe 207 passes through the tower body 1, and the end of the drain pipe 103 away from the tower body 1 is connected to the circulation pool through the circulation pipeline. The circulation pool is used to store the absorbent liquid after reacting with the tail gas. The circulation pool is equipped with a replenishment pipe. Based on the detection results of the absorbent liquid in the circulation pool, the absorbent liquid is appropriately replenished or regenerated in the circulation pool.

[0026] The branch pipe 209 is provided with a cover 210. The nozzle assembly 211 includes a connecting cylinder 2111. The connecting cylinder 2111 is provided with a high-pressure nozzle 2112 and a spray nozzle 2115. The cover 210 includes an upper cover 2101 and a lower cover 2103. The upper cover 2101 and the lower cover 2103 are fixedly connected by an elastic ring 2102. The longitudinal section of the cover 210 is trapezoidal. When the upper cover 2101 moves downward, it is pressed into the inside of the lower cover 2103 by the elastic ring 2102.

[0027] The filter assembly 3 includes a support base 301, the top of which is a curved surface 3011. A through hole 3012 is provided in the middle of the support base 301, and a packing part 302 is provided inside the through hole 3012. The packing part 302 includes a base plate 3021, a support frame 3022, and a movable plate 30221. Electric telescopic rods 30211 are provided at both ends of the base plate 3021. A first wedge block 30212 is provided at the telescopic end of the electric telescopic rod 30211. Openings 30222 are provided on both sides of the support frame 3022. Second wedge blocks 30223 are provided at both ends of the movable plate 30221. The end of the second wedge block 30223 away from the movable plate 30221 passes through the opening 30222 and is connected to the first wedge block 30221. The corresponding wedge block 30212 is engaged. During the extension and retraction of the electric telescopic rod 30211, the horizontal position and vertical height of the movable plate 30221 are controlled by the contact engagement between the first wedge block 30212 and the second wedge block 30223. The bearing frame 3022 is pre-filled with filler in the shape of spheres (hereinafter referred to as filler balls). In the initial state, the electric telescopic rod 30211 extends upward, so that the top of the vertical plate 30225 is pressed against the top of the bearing frame 30222. The overall height of the filler balls between two adjacent vertical plates 30225 is close to the top of the vertical plate 30225. The filler balls are evenly distributed between two adjacent vertical plates 30225, so that the exhaust gas below passes through the bearing frame 30222 at a uniform speed.

[0028] The bottom of the support frame 3022 is fixedly connected to the top of the base plate 3021. There are gaps between the two ends of the movable plate 30221 and the inner sides of the two ends of the support frame 3022. An elastic pad 30224 is provided inside the opening 30222. The end of the second wedge block 30223 away from the movable plate 30221 passes through the elastic pad 30224.

[0029] The top of the support frame 3022, the middle of the bottom plate 3021, and the movable plate 30221 are all filter mesh layers.

[0030] The spray head 2115 is located below the high-pressure spray head 2112. The connecting cylinder 2111 is slidably connected to the high-pressure spray head 2112. A limiting groove 2113 is opened inside the connecting cylinder 2111. A slider 2114 is provided on the outside of the high-pressure spray head 2112. The slider 2114 and the limiting groove 2113 are correspondingly engaged. The spray head 2115 is fixedly connected to the connecting cylinder 2111. A spring 2116 is provided on the top of the spray head 2115. The top of the spring 2116 is fixedly connected to the bottom of the high-pressure spray head 2112. The output end of the high-pressure spray head 2112 is inserted into the input end of the spray head 2115. When the high-pressure spray head 2112 and the spray head 2115 are connected, the absorbent liquid is sprayed downward by the spray head 2115. When the high-pressure spray head 2112 and the spray head 2115 are separated, the absorbent liquid is sprayed downward quickly by the high-pressure spray head 2112.

[0031] In use, before absorbing and purifying the tail gas generated during potassium fluoride production, the two electric telescopic rods 30211 repeatedly extend and retract. Specifically, the electric telescopic rod 30211 on the left first extends upward, while the electric telescopic rod 30211 on the right simultaneously retracts downward. There is a gap between the movable plate 30221 and the support frame 3022. Utilizing the cooperation of the inclined surface at the top of the first wedge block 30212 and the inclined surface at the bottom of the second wedge block 30223, the movable plate 30221 moves to the right. Immediately afterwards, the electric telescopic rod 30211 on the right extends upward, while the electric telescopic rod 30211 on the left simultaneously retracts downward. Utilizing the cooperation of the inclined surface at the top of the first wedge block 30212 and the inclined surface at the bottom of the second wedge block 30223, the movable plate 30221 moves to the left again. Through the cooperation of the two electric telescopic rods 30211, during the repeated extension and contraction process, the movable plate 30221 moves horizontally inside the bearing frame 3022. During the horizontal movement of the movable plate 30221, the more numerous packing balls between the vertical plates 30225 are transferred to the fewer numerous vertical plates 30225, ensuring that the number of packing balls in two adjacent vertical plates 30225 is close. Then, the two electric telescopic rods 30211 are reset, so that the two first wedge blocks 30212 are located on the same horizontal plane. Then, the two electric telescopic rods 30211 synchronously drive the first wedge blocks 30212 to move upward, so that the top of the vertical plate 30225 abuts against the top of the bearing frame 30222. At this time, the multiple vertical plates 30225 evenly separate the packing balls in the bearing frame 30222.

[0032] Then, the tail gas produced by potassium fluoride production is discharged into the bottom of tower 1 through the air inlet pipe 101. At the same time, the valve on the water inlet pipe 201 is opened, and the absorbent liquid for tail gas purification is continuously transported through the water inlet pipe 201 to the water spray pipe 208, branch pipe 209 and nozzle assembly 211 and sprayed downwards. The absorbent liquid flows downwards through the gaps of the packing balls in the support frame 3022. When the tail gas located below the support frame 3022 flows upwards, the impurities in the tail gas are first blocked by the filter screen layer in the middle of the bottom plate 3021. Then, the tail gas passing through the bottom plate 3021 continues to flow upwards after passing through the gaps of the packing balls. When the tail gas passes through the gaps of the packing balls, it will initially contact and react with the absorbent liquid in the gaps of the packing balls, thereby achieving the initial purification of harmful gases in the tail gas.

[0033] After initial filtration, the exhaust gas continues to flow upward. The absorbent sprayed downward through the nozzle assembly 211 reacts with the continuously upward-flowing exhaust gas in a countercurrent flow, thus achieving secondary purification of the exhaust gas.

[0034] After secondary purification, the exhaust gas has completed the absorption and purification of the exhaust gas produced by potassium fluoride production. At this time, the exhaust gas continues to flow upward. When it passes through the demister at the top of tower 1, the water mist in the exhaust gas is intercepted. Finally, the exhaust gas after water mist interception is discharged from tower 1 through exhaust port 104.

[0035] Example 2 A tail gas concentration detector is pre-installed in the inlet pipe 101 to determine the concentration of tail gas entering the tower body 1. When a high concentration of tail gas is detected entering the tower body 1, the concentration of tail gas passing through the support frame 3022 per unit time also increases accordingly. At this time, due to the countercurrent contact reaction between the absorbent liquid and the tail gas, the droplets of the absorbent liquid cannot complete the full reaction with the high concentration of tail gas within the predetermined time. As a result, some unreacted tail gas is still discharged from the tower body 1 through the exhaust port 104 without meeting the emission standards. To address this, Example 2 is proposed: During use, when the exhaust gas concentration detector detects a high concentration of exhaust gas entering the tower 1, the cylinder 206 rapidly extends and slowly retracts as the absorbent liquid continues to spray downwards through the nozzle assembly 211. Specifically, when the cylinder 206 rapidly extends, the annular seat 2061 drives the water spray pipe 208 and the cover 210 to move downwards quickly and short distances. During this process, the downward movement speed of the nozzle assembly 211 increases, and the proportion of time that the nozzle assembly 211 sprays downwards per unit time increases, while the supply speed of the absorbent liquid remains unchanged. This results in an increase in the amount of sprayed liquid per unit volume in the space between the fixed ring 202 and the support seat 301, thereby increasing the density of the sprayed liquid. Simultaneously, the nozzle assembly 211 moves rapidly downwards, which not only increases the vertical coverage of the absorbent liquid but also, due to the rapid movement of the shroud 210, creates a certain disturbance to the exhaust gas, making the horizontal distribution of the exhaust gas more uniform. This also expands the contact area between the absorbent liquid and the exhaust gas in the horizontal direction. By rapidly moving the shroud 210 downwards, the upward flow speed of the high-concentration exhaust gas through the support frame 3022 is slowed down. When the cylinder 206 slowly retracts, the upward attraction of the shroud 210 on the high-concentration exhaust gas is small, preventing the shroud 210 from accelerating the upward flow speed of the high-concentration exhaust gas when it moves upwards. This ensures that the airflow remains in a slow upward flow state during the rapid extension and slow retraction of the cylinder 206. In addition, the repeated rapid extension and slow retraction of the cylinder 206 allows the nozzle assembly 211 to spray at different heights, further increasing the coverage of the spray liquid throughout the entire tower body 1. The increased density of the spray liquid means more opportunities for the absorbent liquid to come into contact with the exhaust gas per unit volume. The expanded coverage of the spray liquid allows the exhaust gas to come into full contact with the absorbent liquid over a larger area. At the same time, as the airflow remains in a slow upward flow state during the rapid extension and slow contraction of cylinder 206, more time is provided for the reaction between the absorbent liquid and the exhaust gas. This effectively improves the efficiency of the reaction between the absorbent liquid droplets and the high-concentration exhaust gas during the slow contraction of cylinder 206.

[0036] As a supplement, the spray assembly 2 and the filter assembly 3 can be arranged in multiple sets at equal intervals within the tower body 1 according to the usage requirements.

[0037] Example 3 Please see Figure 1-11 As shown, in actual use, although the filter layer in the middle of the base plate 3021 can filter larger impurities in the exhaust gas, fine particles carried in the exhaust gas will pass through the filter layer and mix into the gaps of the packing balls. As more and more fine particles accumulate in the gaps of the packing balls, they will block the support frame 3022, causing the airflow resistance through the support frame 3022 to increase. To address this problem, the following embodiment three is provided: A gas flow rate sensor is installed on the top of the support frame 3022. The gas flow rate sensor has a preset standard threshold. When the flow rate of the air passing through the support frame 3022 is above the standard threshold, it indicates that the flow rate is normal. When the gas flow rate sensor detects that the flow rate of the air passing through the support frame 3022 is below the standard threshold, it indicates that a blockage has occurred and needs to be cleared in time.

[0038] During use, when the gas flow rate sensor detects that the gas flow rate through the support frame 3022 is below the standard threshold, the valve on the water inlet pipe 201 remains open, while the air inlet valve on the air inlet pipe 101 is temporarily closed. The absorbent liquid is sprayed downwards through the nozzle assembly 211. The cylinder 206 drives the water spray pipe 208, branch pipe 209, and cover 210 downwards via the annular seat 2061. The bottom of the lower cover 2103 is lower than the bottom of the connecting cylinder 2111, ensuring that the bottom of the lower cover 2103 is tightly fitted with the curved surface 3011 at the top of the support base 301. Then, the cylinder 206 moves downwards rapidly, driving the annular seat 2061, water spray pipe 208, branch pipe 209, and nozzle assembly 210 downwards. 1. The cover 210 moves downward, and its longitudinal section is trapezoidal. The upper cover 2101 is pressed down synchronously to the inside of the lower cover 2103 under the drive of the branch pipe 209. Due to the blockage effect of fine particles on the bearing frame 3022, the pressure between the support 301, the bearing frame 3022 and the cover 210 increases. At this time, the pressure generated between the support 301, the bearing frame 3022 and the cover 210 enters the connecting cylinder 2111 and pushes the high-pressure nozzle 2112 upward. The spring 2116 is stretched, and the high-pressure nozzle 2112 moves upward along the limiting groove 2113. At this time, the output end of the high-pressure nozzle 2112 is separated from the input end of the spray head 2115. At this time, the absorption pipe 209 inputs into the connecting cylinder 2111. The liquid will be rapidly sprayed downwards through the outside of the spray head 2115. The high-pressure absorbent liquid sprayed downwards from the connecting cylinder 2111 impacts the blockage inside the support frame 3022. Simultaneously, the two electric telescopic rods 30211, via the first wedge block 30212 and the second wedge block 30223, first drive the movable plate 30221 downwards, causing the top of the vertical plate 30225 to detach from the top of the support frame 3022. Then, the electric telescopic rods 30211, via the first wedge block 30212 and the second wedge block 30223, drive the movable plate 30221 upwards, causing the movable plate 30221 to drive the vertical plate 30225 upwards to re-contact and impact the top of the support frame 3022. Two electric telescopic rods 30211 synchronously drive two movable plates 30221 and vertical plate 30225 to move up and down repeatedly, causing the vertical plate 30225 to repeatedly contact and impact the top of the support frame 30222, causing the movable plate 30221 to vibrate at high frequency. The high frequency vibration of the movable plate 30221 is used to quickly break up the blockage in the gap of the packing balls. During this process, the absorbent liquid sprayed downward by the high pressure nozzle 2112 causes the broken blockage fragments to move downward. At the same time, the pressure between the support base 301, the support frame 3022 and the cover 210, combined with the fluidity of the absorbent liquid, allows the absorbent liquid to carry the fragments quickly through the filter layer in the middle of the movable plate 30221 and the bottom plate 3021 and discharge downward.

[0039] This removes the fine particles that accumulate in the gaps between the packing balls, solving the problem of these particles clogging the support frame 3022 and restoring the smoothness of airflow through the support frame 3022.

[0040] However, when the exhaust gas enters tower 1, the fine particles in the exhaust gas first come into contact with the packing balls at the bottom of the vertical plate 30225. The gaps between the packing balls at the bottom of the vertical plate 30225 are preferentially blocked by the fine particles. When the absorbent sprayed downwards from the high-pressure nozzle 2112 impacts the blockage in the support frame 3022, the absorbent mainly acts on the upper area of ​​the vertical plate 30225, making it difficult to quickly remove the blockage at the bottom of the vertical plate 30225. This affects the treatment efficiency of the exhaust gas generated during potassium fluoride production. Therefore, the following improvements are made: During the process described above, where the movable plate 30221 and the vertical plate 30225 are repeatedly moved up and down and vibrated to break them through the two electric telescopic rods 30211, and the absorbent liquid is rapidly sprayed downwards through the high-pressure nozzle 2112, if the pressure between the support base 301, the bearing frame 3022, and the cover 210 still keeps the high-pressure nozzle 2112 and the spray head 2115 in a disengaged state within a preset time, it indicates that there is a stubborn blockage at the bottom of the vertical plate 30225 that is difficult to remove quickly. At this time, the left electric telescopic rod 30211 first moves the first wedge block 30212 upwards, while the right electric telescopic rod 30211 remains stationary. The two first wedge blocks 30212 are at different heights, which causes the movable plate 30221 to tilt. At this time, the two electric telescopic rods 30211 again simultaneously drive the movable plate 30221 to vibrate up and down, causing the movable plate 30221 to tilt and vibrate during the process. This causes the loose packing balls between the vertical plates 30225 to move downhill, thereby increasing the contact area between the stubborn blockage at the bottom of the vertical plates 30225 and the absorbent liquid, accelerating the removal speed of the stubborn blockage, and achieving the purpose of quickly removing the blockage in the support frame 3022. Similarly, during this process, the electric telescopic rod 30211 on the right side can drive the first wedge block 30212 to move upward, keeping the electric telescopic rod 30211 on the left side stationary, and causing the movable plate 30221 to slope downhill from right to left, thereby improving the removal of the stubborn blockage on the right side of the movable plate 30221. When the high-pressure nozzle 2112 and the spray nozzle 2115 are reset under the action of the spring 2116, and the high-pressure nozzle 2112 and the spray nozzle 2115 are reconnected, it indicates that the unblocking of the support frame 3022 is completed. Then, the air inlet valve on the air inlet pipe 101 is restarted to quickly restore the treatment of the waste gas during potassium chloride production.

[0041] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent modifications made based on the content of the present invention specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A tail gas absorption tower for potassium fluoride production, comprising a tower body (1), wherein the bottom of the tower body (1) is provided with an air inlet pipe (101) and a drain pipe (103), and the inside of the tower body (1) is provided with a spraying assembly (2) and a filtering assembly (3), characterized in that: the spraying assembly (2) comprises a support part and a spraying part, the support part comprises a support disc (205), the middle part of the support disc (205) is provided with a bellows (207), the top of the bellows (207) is provided with a water inlet pipe (201), the bottom of the support disc (205) is provided with a gas cylinder (206), the spraying part comprises a water spraying pipeline (208), the telescopic end of the gas cylinder (206) is fixedly connected with the water spraying pipeline (208), the top of the water spraying pipeline (208) and the bottom of the bellows (207) are in communication with each other, the bottom of the water spraying pipeline (208) is provided with a branch pipe (209), and the bottom of the branch pipe (209) is provided with a nozzle assembly (211); the filtering assembly (3) comprises a support seat (301), the middle part of the support seat (301) is provided with a through hole (3012), the inside of the through hole (3012) is provided with a filler part (302), the filler part (302) comprises a bottom plate (3021), a bearing frame (3022) and a movable plate (30221), the two ends of the bottom plate (3021) are provided with electric telescopic rods (30211), the telescopic end of each electric telescopic rod (30211) is provided with a first wedge-shaped block (30212), the two sides of the bearing frame (3022) are provided with openings (30222), the two ends of the movable plate (30221) are provided with second wedge-shaped blocks (30223), and the ends, away from the movable plate (30221), of the second wedge-shaped blocks (30223) penetrate through the openings (30222) and are correspondingly matched with the first wedge-shaped blocks (30212).

2. The tail gas absorption tower for potassium fluoride production according to claim 1, characterized in that: The bottom of the tower body (1) is provided with a blowdown pipe (102), one side of the support disc (205) is provided with a support plate (204), the support disc (205) is connected with a fixing ring (202) through the support plate (204), the outer side of the fixing ring (202) is fixedly connected with the tower body (1), the telescopic end of the gas cylinder (206) is provided with an annular seat (2061), the gas cylinder (206) is fixedly connected with the top of the water spraying pipeline (208) through the annular seat (2061), the top of the tower body (1) is provided with an exhaust port (104), and the inside of the tower body (1) is provided with a mist eliminator near the exhaust port (104).

3. The tail gas absorption tower for potassium fluoride production according to claim 1, characterized in that: The water spraying pipeline (208) is arranged at the bottom of the annular seat (2061), one end of the water inlet pipe (201), away from the bellows (207), penetrates through the tower body (1), one end of the drain pipe (103), away from the tower body (1), is in communication with a circulating pool through a circulating pipeline, the circulating pool is used for storing absorption liquid after reaction with tail gas, a liquid supplementing pipe is arranged in the circulating pool, and the absorption liquid in the circulating pool is appropriately supplemented or regenerated according to the detection result of the absorption liquid.

4. The tail gas absorption tower for potassium fluoride production according to claim 1, characterized in that: The branch pipe (209) is provided with a cover body (210), the spray head assembly (211) comprises a connecting barrel (2111), the inside of the connecting barrel (2111) is provided with a high-pressure spray head (2112) and a spray head (2115), the cover body (210) comprises an upper cover body (2101) and a lower cover body (2103), and the upper cover body (2101) and the lower cover body (2103) are fixedly connected through an elastic ring (2102).

5. The tail gas absorption tower for potassium fluoride production according to claim 4, characterized in that: The spray head (2115) is located below the high-pressure spray head (2112), the connecting barrel (2111) is in sliding connection with the high-pressure spray head (2112), the inside of the connecting barrel (2111) is provided with a limiting groove (2113), the outer side of the high-pressure spray head (2112) is provided with a sliding block (2114), the sliding block (2114) is correspondingly matched with the limiting groove (2113), the spray head (2115) is fixedly connected with the connecting barrel (2111), the top of the spray head (2115) is provided with a spring (2116), the top of the spring (2116) is fixedly connected with the bottom of the high-pressure spray head (2112), and the output end of the high-pressure spray head (2112) is correspondingly inserted with the input end of the spray head (2115).

6. The tail gas absorption tower for potassium fluoride production according to claim 1, characterized in that: The top of the support base (301) is a curved surface (3011), the bottom of the bearing frame (3022) is fixedly connected with the top of the bottom plate (3021), gaps are left between the two ends of the movable plate (30221) and the inner sides of the two ends of the bearing frame (3022), the inside of the opening (30222) is provided with an elastic pad (30224), and one end, away from the movable plate (30221), of the second wedge-shaped block (30223) penetrates through the elastic pad (30224).

7. The tail gas absorption tower for potassium fluoride production according to claim 5, characterized in that: The top of the bearing frame (3022), the middle of the bottom plate (3021) and the movable plate (30221) are all filter screen layers; The top of the bearing frame (3022) is provided with a gas flow rate sensor, the inside of the bearing frame (3022) is filled with filler balls, the top of the connecting barrel (2111) is provided with an internal thread, the bottom end of the branch pipe (209) is provided with an external thread, the connecting barrel (2111) is in threaded connection with the branch pipe (209), and the longitudinal section of the cover body (210) is in trapezoidal structure.

8. The tail gas absorption tower for potassium fluoride production according to claim 4, characterized in that: The bottom of the lower cover body (2103) is lower than the bottom end of the connecting barrel (2111), the branch pipe (209) is provided with a plurality of branch pipes, the distance between adjacent two branch pipes (209) is equal, and the spray assembly (2) and the filter assembly (3) are arranged in multiple groups at equal intervals in the tower body (1).

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