A low-carbonic acid tower for producing tert-carbonic acid

Abstract

The invention relates to the technical field of waste gas treatment, and discloses a low-carbonic acid tower for tertiary carbonic acid production, comprising a tower body, wherein a plurality of support frames are arranged on the inner wall of the tower body, packing layers are arranged inside the support frames, and distribution plates are arranged below the support frames. By evenly arranging drip ports at the bottom of a spray pipe, dripping absorption liquid can better cover the inside of the tower body, so that the waste gas and the absorption liquid can better perform countercurrent contact. When the absorption liquid flows through the provided packing layer, the contact area between the absorption liquid and the waste gas can be increased, and the adsorption screen in the packing layer can also adsorb some harmful substances in the waste gas. By arranging a distribution plate below the spray pipe, the absorption liquid can be secondary distributed, so that it is evenly distributed inside the tower body again, thereby avoiding uneven distribution of droplets.

Description

Technical Field

[0001] The invention relates to the technical field of waste gas treatment, in particular to a low-carbonic acid tower for producing tertiary carbonic acid. Background Art

[0002] The main components of the waste gas produced in the process of producing tert-butyl carbonate may include unreacted raw materials, intermediate products and possible volatile by-products, etc. If these waste gases are not treated, the organic pollutants in them may pollute the atmospheric environment, participate in photochemical reactions to generate harmful secondary pollutants, affect air quality and visibility, and may also cause harm to human health.

[0003] The waste gas generated in the process of producing tertiary carbonic acid in the prior art is generally purified by a low-carbonic acid tower. The low-carbonic acid tower is usually in the form of a packed tower or a plate tower, and is mainly composed of a tower body, a packing (or a plate), a liquid distributor, a redistributor, an air inlet, an air outlet, a liquid inlet and a liquid outlet. The low-carbonic acid tower uses alkaline liquid to absorb and treat the acidic components and other pollutants in the waste gas through gas-liquid countercurrent contact. The presence of the packing (or plate) increases the gas-liquid contact area and improves the mass transfer efficiency. The uniformity and stability of the treatment process are ensured through reasonable liquid distribution and redistribution design. Ultimately, the effective purification and treatment of the waste gas is achieved.

[0004] However, the liquid distributor will usually be clogged during long-term use. Since the absorption liquid contains a high concentration of crystallizable substances, when the temperature, concentration and other conditions change, it is easy to form crystals to clog the distributor, resulting in uneven distribution of the absorption liquid, excessive liquid flow in some areas, and too little or even no liquid flow in other areas. This will lead to poor gas-liquid contact in the tower and reduced treatment effect. Summary of the invention

[0005] The purpose of the present invention is to provide a low-carbonic acid tower for the production of tertiary carbonic acid in order to solve the above-mentioned problems and overcome the defects of the prior art, as described in detail below.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The present invention provides a low-carbonic acid tower for producing tertiary carbonic acid, comprising a tower body, wherein the inner wall of the tower body is provided with a plurality of support frames, the interior of each support frame is provided with a packing layer, and a distribution plate is provided below each support frame;

[0008] The inner wall of the tower body between the packing layer and the distribution plate is provided with a spray mechanism for circulating and spraying the absorption liquid;

[0009] A cleaning mechanism is provided above each group of distribution plates to clean the blockage of the distribution plates;

[0010] A collecting mechanism is provided at the bottom of the inner wall of the tower body for collecting some solid particles in the absorption liquid;

[0011] The cleaning mechanism includes a support frame, which is fixedly connected to the inner wall of the tower body below the distribution plate, the top of the support frame is fixedly connected to a support tube, and the distribution plate is slidably connected to the outer wall of the support tube, the outer wall of the support tube is slidably connected to a dredging plate below the distribution plate, and the support tube is between the dredging plate and the distribution plate and is movably sleeved with a first spring.

[0012] Preferably, the cleaning mechanism also includes a movable ring, which is slidably connected to the outer wall of the distribution plate, and the top of the movable ring is fixedly connected to multiple groups of sliding buckles, and the sliding buckles are evenly distributed in a ring shape, and the top of the distribution plate corresponds to the position of each group of sliding buckles. The position, and each group of sliding columns is slidably connected to the inner wall of the sliding buckle at the corresponding position, and the outer wall of the sliding column is movably sleeved with a second spring.

[0013] Preferably, the cleaning mechanism further comprises a positioning ring, which is fixedly connected to the inner wall of the tower body at a position below the movable ring, and the outer wall of the support tube is located between the support frame and the dredging plate and a movable sleeve is provided with a third spring.

[0014] Preferably, the cleaning mechanism also includes a limiting ring, which is coaxially fixedly connected to the top of the distribution plate and is gap-matched with the support tube. The inner wall of the limiting ring is rotatably connected to a retaining ring, the outer wall of the retaining ring is fixedly connected to a scraper, and the scraper is in contact with the surface of the distribution plate.

[0015] Preferably, the cleaning mechanism also includes a sliding rod, which is slidably connected to the inner wall of the support tube, and the top of the sliding rod is fixedly connected to the clamping ring through a connecting rod. A spiral groove is provided on the outer wall of the sliding rod, and the inner wall of the support tube is fixedly connected to the sliding block at the position of the spiral groove, and the sliding block is slidably connected to the inner wall of the spiral groove.

[0016] Preferably, the spray mechanism includes a circulation box, which is fixedly connected to one side of the outer wall of the tower body. The circulation box is connected to the interior of the tower body through a return pipe. The inner wall of the tower body below each group of support frames is fixedly connected with a spray pipe. The interior of the circulation box is fixedly connected with a water pump, and the water pump is connected to the spray pipe through a water pipe.

[0017] Preferably, the spray mechanism also includes a filter plate, which is fixedly connected to the inner wall of the circulation box at a position outside the water pump, and a partition is fixedly connected to the inner wall of the circulation box. A sedimentation box is provided on the inner wall of the circulation box below the return pipe.

[0018] Preferably, an air inlet pipe is fixedly connected to the bottom of the tower body for connecting to an induced draft fan to receive exhaust gas, and an exhaust pipe is fixedly connected to the top of the tower body for discharging treated gas.

[0019] Preferably, the collecting mechanism comprises a rotating rod, which is rotatably connected to the bottom of the inner wall of the tower body, and a partition plate is fixedly connected to the top of the rotating rod, and a plurality of connecting pocket plates are fixedly connected to the outer wall of the partition plate.

[0020] Preferably, a plurality of groups of scrapers are fixedly connected to the bottom of the rotating rod, and the scrapers are in contact with the bottom of the inner wall of the tower body.

[0021] The beneficial effects are:

[0022] 1. The present invention arranges the dripping outlets evenly at the bottom of the spray pipe so that the dripping absorption liquid can better cover the inside of the tower body, so that the exhaust gas and the absorption liquid can better have countercurrent contact. When the absorption liquid flows through the provided packing layer, the contact area between the absorption liquid and the exhaust gas can be increased, and the adsorption screen in the packing layer can also adsorb some harmful substances in the exhaust gas. By arranging a distribution plate under the spray pipe, the absorption liquid can be distributed again so that it is evenly distributed inside the tower body again, avoiding the situation of uneven distribution of droplets. By arranging the distribution plate, the absorption liquid can drip naturally. Falling can slow down the speed of the droplets falling and increase the droplets' hovering time, thereby avoiding the situation where the water droplets fall too fast due to the water pump pressurization, thereby improving the spraying effect, and the circulation box where the water pump is located is divided into a sedimentation overflow area and a filtration area by a partition. The sedimentation overflow area uses a sedimentation box to precipitate and collect some solid particles in the absorption liquid, including some crystals generated by the reaction of exhaust gas and absorption liquid, adsorption screen debris, and some solid particles carried by exhaust gas, while the filtration area intercepts these solid particles through filter plates to prevent them from entering the area where the water pump is located and affecting the service life of the water pump.

[0023] 2. According to the present invention, when the top of the distribution plate is blocked, the flow rate of the distribution plate will decrease, resulting in more and more absorption liquid above the distribution plate. A large amount of absorption liquid increases the load-bearing capacity of the distribution plate, thereby causing the distribution plate to sink. During the sinking of the distribution plate, the dredging plate will be inserted into the drip holes in the distribution plate to dredge the drip holes. At the same time, due to the insertion of the dredging plate, the drip holes of the distribution plate are completely blocked, so that the absorption liquid above the distribution plate is still in a state of increasing accumulation, and the distribution plate is still in a state of continuous decline until the movable ring on the distribution plate contacts the positioning ring. At this time, the positioning ring will lift the movable ring, causing the distribution plate and the movable ring to be misaligned and a gap to appear, so that the absorption liquid gathered above the distribution plate will carry the impurities cleaned in the drip holes and be discharged from the gap, thereby avoiding the distribution of the dripping liquid in the tower body being affected by the blockage of the distribution plate. When the gravity above the distribution plate returns to normal, the tension of the third spring will lift the distribution plate to reset the movable ring and restore the function of distributing the droplets.

[0024] 3. In the present invention, the movable ring is lifted up by the positioning ring, so that the distribution plate and the movable ring are misaligned to form a gap, and the absorption liquid collected above the distribution plate will carry the impurities cleaned in the drip holes to be discharged from the gap. However, since the blockage at the center of the distribution plate is far away from the gap, the force exerted by the liquid flow on it is small, and it is not easy to be carried out by the liquid and discharged together, which can easily lead to secondary blockage. By arranging a scraper, when the distribution plate sinks due to the weight of the liquid, the connection relationship between the spiral groove and the slider is used to limit the relative position, forcing the slide bar to rotate during the descent, thereby driving the scraper on the retaining ring to rotate together, and the rotation of the arc-shaped scraper pushes the blockage to a position close to the gap, so as to facilitate discharge from the gap together with the absorption liquid, thereby avoiding secondary blockage caused by the residual blockage after the positioning ring and the movable ring are reset.

[0025] Fourth, the present invention sets a collecting mechanism. When the induced draft fan connected to the air inlet pipe injects the exhaust gas into the bottom of the tower body, the exhaust gas enters tangentially and pushes the pocket plate in the absorption liquid, so that the pocket plate drives the dividing plate to rotate. The exhaust gas entering the absorption liquid will form bubbles. The bubbles will be evenly distributed under the dividing plate. When the bubbles rise, they will be divided into a large number of small bubbles by the dividing plate, so as to increase the contact area between the exhaust gas and the absorption liquid, thereby improving the effect of treating the exhaust gas.

[0026] 5. When the dividing plate rotates, the scraper will also be driven to rotate. Through the continuous rotation of the scraper, the solid particles precipitated in the absorption liquid can be pushed out of the tower body from the reflux pipe and fall into the sedimentation box for collection, so as to facilitate centralized treatment, reduce the frequency of tower cleaning and maintenance, and reduce the maintenance burden of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is a schematic diagram of the overall appearance structure of the present invention;

[0029] Figure 2 is a partial cross-sectional view of the present invention;

[0030] Figure 3 The present invention Figure 2 Schematic diagram of the structure of the circulation box area;

[0031] Figure 4 It is a structural schematic diagram of the spray pipe in the present invention;

[0032] Figure 5 The present invention Figure 2 Structural diagram of the dredging plate area;

[0033] Figure 6 It is a structural schematic diagram of the cleaning mechanism in the present invention;

[0034] Figure 7 The present invention Figure 6 A magnified image of point A;

[0035] Figure 8 It is a schematic diagram of the connection relationship between the support tube and the slide rod in the present invention;

[0036] Fig. 9 It is a structural schematic diagram of the collecting mechanism in the present invention.

[0037] The accompanying drawings are marked as follows: 1. tower body; 2. air inlet pipe; 3. exhaust pipe; 4. circulation box; 5. support frame; 6. packing layer; 7. spray pipe; 8. support frame; 9. support cylinder; 10. distribution plate; 11. dredging plate; 12. first spring; 13. movable ring; 14. slide buckle; 15. slide column; 16. second spring; 17. third spring; 18. positioning ring; 19. limit ring; 20. snap ring; 21. scraper; 22. slide rod; 23. connecting rod; 24. spiral groove; 25. slider; 26. rotating rod; 27. dividing plate; 28. pocket plate; 29. ​​scraper; 30. reflux pipe; 31. partition; 32. filter plate; 33. water pump; 34. water pipe; 35. sedimentation box. DETAILED DESCRIPTION

[0038] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0039] Example 1

[0040] See also Figure 1 , Figure 2 , Figure 5 , Figure 6 , Figure 7 As shown, the present invention provides a low-carbonic acid tower for the production of tertiary carbonic acid, including a tower body 1, a plurality of groups of support frames 5 are arranged on the inner wall of the tower body 1, a packing layer 6 is arranged inside the support frame 5, a distribution plate 10 is arranged below the support frame 5, a spray mechanism is arranged at a position between the packing layer 6 and the distribution plate 10 on the inner wall of the tower body 1, which is used for circulating and spraying absorption liquid, a cleaning mechanism is arranged above each group of distribution plates 10, which is used for cleaning the blockage of the distribution plate 10, and a collecting mechanism is arranged at the bottom of the inner wall of the tower body 1, which is used for collecting some solid particles in the absorption liquid, wherein the cleaning mechanism includes a support frame 8, the support frame 8 is fixedly connected to the position of the inner wall of the tower body 1 below the distribution plate 10, the top of the support frame 8 is fixedly connected to a support tube 9, and the distribution plate 10 is slidably connected to the outer wall of the support tube 9, the outer wall of the support tube 9 is slidably connected to a dredging plate 11 at a position below the distribution plate 10, and the support tube 9 is movably sleeved with a first spring 12 (combined with Figure 6 and Figure 7 ), the cleaning mechanism also includes a movable ring 13, which is slidably connected to the outer wall of the distribution plate 10, and a plurality of groups of slide buckles 14 are fixedly connected to the top of the movable ring 13, and the slide buckles 14 are evenly distributed in a ring shape, and a slide column 15 is fixedly connected to the position of each group of slide buckles 14 at the top of the distribution plate 10, and each group of slide columns 15 is slidably connected to the inner wall of the slide buckle 14 at the corresponding position, and the outer wall of the slide column 15 is movably sleeved with a second spring 16, and the cleaning mechanism also includes a positioning ring 18, and the positioning ring 18 is fixedly connected to the inner wall of the tower body 1 at a position below the movable ring 13, and the outer wall of the support tube 9 is between the support frame 8 and the dredging plate 11 and movably sleeved with a third spring 17.

[0041] It is worth noting that the tension of the third spring 17 is greater than the tension of the first spring 12, so that when the third spring 17 and the first spring 12 are compressed under pressure, the first spring 12 will be compressed first, and the tension of the second spring 16 is the smallest, and its effect on the third spring 17 and the first spring 12 is negligible.

[0042] Furthermore, when the top of the distribution plate 10 is clogged, the flow rate of the distribution plate 10 will decrease, causing the absorption liquid above the distribution plate 10 to gather more and more. A large amount of absorption liquid increases the load-bearing capacity of the distribution plate 10, thereby causing the distribution plate 10 to sink. During the sinking process of the distribution plate 10, the dredging plate 11 will be inserted into the drip holes in the distribution plate 10 to dredge the drip holes. At the same time, due to the insertion of the dredging plate 11, the drip holes of the distribution plate 10 are completely blocked, so that the absorption liquid above the distribution plate 10 is still in a state of gathering more and more, and the distribution plate 10 is still in a state of continuous decline. state until the movable ring 13 on the distribution plate 10 contacts the positioning ring 18. At this time, the positioning ring 18 will lift the movable ring 13, so that the distribution plate 10 and the movable ring 13 are misaligned and a gap appears, so that the absorption liquid collected above the distribution plate 10 will be discharged from the gap together with the impurities cleaned in the drip holes, thereby avoiding the distribution of the dripping liquid in the tower body 1 due to the blockage of the distribution plate 10. When the gravity above the distribution plate 10 returns to normal, the tension of the third spring 17 will lift the distribution plate 10 to reset the movable ring 13 and resume the function of distributing the droplets.

[0043] Specifically, when the top of the distribution plate 10 is clogged, the flow of the distribution plate 10 will decrease, causing the absorption liquid above the distribution plate 10 to gather more and more. A large amount of absorption liquid increases the load-bearing capacity of the distribution plate 10, thereby causing the distribution plate 10 to sink. During the sinking process of the distribution plate 10, the first spring 12 between the distribution plate 10 and the dredging plate 11 will be compressed first, so that the dredging plate 11 is inserted into the drip hole in the distribution plate 10 to dredge the drip hole. At the same time, due to the insertion of the dredging plate 11, the drip hole of the distribution plate 10 is completely blocked, so that the absorption liquid above the distribution plate 10 is still in a state of gathering more and more, and the distribution plate 10 is still in a state of continuous decline, thereby forcing the dredging plate 11 to compress the third Spring 17, until the movable ring 13 on the distribution plate 10 contacts with the positioning ring 18, at this time, the positioning ring 18 will lift the movable ring 13, so that the distribution plate 10 and the movable ring 13 are misaligned and a gap appears, so that the absorption liquid collected above the distribution plate 10 will be discharged from the gap together with the impurities cleaned in the drip holes, and when the gravity above the distribution plate 10 returns to normal, the tension of the first spring 12 will separate the distribution plate 10 from the dredging plate 11, and restore the effect of distributing droplets, and the tension of the third spring 17 is to lift the distribution plate 10 above the dredging plate 11, so that the movable ring 13 is separated from the positioning ring 18, and the movable ring 13 is reset under the gravity of the second spring 16 and the movable ring 13 itself.

[0044] Example 2

[0045] See also Figure 6 , Figure 7 , Figure 8As shown, the cleaning mechanism also includes a limit ring 19, which is coaxially fixedly connected to the top of the distribution plate 10 and is gap-matched with the support tube 9. The inner wall of the limit ring 19 is rotatably connected with a clamping ring 20, and the outer wall of the clamping ring 20 is fixedly connected with a scraper 21, and the scraper 21 is in contact with the surface of the distribution plate 10. The cleaning mechanism also includes a slide bar 22, which is slidably connected to the inner wall of the support tube 9, and the top of the slide bar 22 is fixedly connected to the clamping ring 20 through a connecting rod 23. A spiral groove 24 is opened on the outer wall of the slide bar 22, and a slider 25 is fixedly connected to the position of the inner wall of the support tube 9 corresponding to the spiral groove 24, and the slider 25 is slidably connected to the inner wall of the spiral groove 24.

[0046] Furthermore, since the movable ring 13 is lifted up by the positioning ring 18, the distribution plate 10 and the movable ring 13 are misaligned to form a gap, so that the absorption liquid collected above the distribution plate 10 will carry the impurities cleaned in the drip holes and be discharged from the gap together. However, since the blockage at the center of the distribution plate 10 is far away from the gap, the force exerted by the liquid flow on it is small, and it is not easy to be carried out together with the liquid, which can easily lead to secondary blockage. By setting the scraper 21, when the distribution plate 10 sinks due to the weight of the liquid, the scraper 21 on the snap ring 20 is axially driven on the inner wall of the limit ring 19, It descends together with the distribution plate 10, thereby causing the sliding rod 22 connected to the retaining ring 20 through the connecting rod 23 to descend together, causing the sliding rod 22 to slide down inside the support tube 9, and relatively limited by the connection relationship between the spiral groove 24 and the slider 25, forcing the sliding rod 22 to rotate synchronously with the spiral path of the spiral groove 24 during the sliding process, thereby driving the scraper 21 on the retaining ring 20 to rotate together, and the rotation of the arc-shaped scraper 21 pushes the blockage to a position close to the gap, so as to facilitate discharge from the gap together with the absorption liquid, thereby avoiding residual blockage after the positioning ring 18 and the movable ring 13 are reset to cause secondary blockage.

[0047] Example 3

[0048] See also Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, the spray mechanism includes a circulation box 4, which is fixedly connected to one side of the outer wall of the tower body 1. The circulation box 4 is connected to the interior of the tower body 1 through a return pipe 30. The inner wall of the tower body 1 is fixedly connected with a spray pipe 7 below each group of support frames 5. The interior of the circulation box 4 is fixedly connected with a water pump 33, and the water pump 33 is connected to the spray pipe 7 through a water pipe 34. The spray mechanism also includes a filter plate 32, which is fixedly connected to the inner wall of the circulation box 4 at a position outside the water pump 33. The inner wall of the circulation box 4 is fixedly connected with a partition plate 31. A sedimentation box 35 is provided on the inner wall of the circulation box 4 below the return pipe 30. An air inlet pipe 2 is fixedly connected to the bottom of the tower body 1 for connecting the induced draft fan to the exhaust gas. An exhaust pipe 3 is fixedly connected to the top of the tower body 1 for discharging the treated gas.

[0049] It is worth noting that the tower body 1 is made of stainless steel, which has high strength and hardness, can withstand greater pressure and external force, and is not easy to deform or damage. When treating tertiary carbonic acid production waste gas, even if the waste gas contains some solid particles or a large airflow impact, the stainless steel tower body can maintain good structural stability and has good corrosion resistance, and can resist the erosion of corrosive substances in the waste gas. The filler layer 6 is filled with an adsorption screen. The adsorption of the adsorption screen is a physical change process. The main reason for the adsorption is a surface force generated by the molecular gravity acting on the solid surface. When the fluid flows through, some molecules in the fluid collide with the adsorbent surface due to irregular motion, and molecules are concentrated on the surface, so that the number of such molecules in the fluid is reduced, so as to achieve the purpose of separation and removal. The absorption liquid is an alkaline solution, such as sodium hydroxide solution, potassium hydroxide solution, etc., which is contacted by countercurrent. During the contact process, the acidic components in the waste gas, such as carbon dioxide, sulfur dioxide, etc., react chemically with the alkaline substances in the absorption liquid and are absorbed into the solution.

[0050] Furthermore, by evenly distributing the dripping outlet at the bottom of the spray pipe 7, the dripping absorption liquid can better cover the inside of the tower body 1, so that the exhaust gas and the absorption liquid can better have countercurrent contact. When the absorption liquid flows through the provided packing layer 6, the contact area between the absorption liquid and the exhaust gas can be increased, and the adsorption screen in the packing layer 6 can also adsorb some harmful substances in the exhaust gas. By arranging a distribution plate 10 under the spray pipe 7, the absorption liquid can be redistributed so that it is evenly distributed inside the tower body 1 again, avoiding uneven distribution of droplets. By arranging the distribution plate 10, the absorption liquid is allowed to drip naturally. The falling speed of the droplets can be slowed down and the hovering time of the droplets can be increased, thereby avoiding the situation where the water droplets fall too fast due to the pressurization of the water pump 33, thereby improving the spraying effect. The circulation box 4 where the water pump 33 is located is divided into a sedimentation overflow area and a filtration area by the partition 31. The sedimentation overflow area uses the sedimentation box 35 to precipitate and collect some solid particles in the absorption liquid, including some crystals generated by the reaction of exhaust gas and absorption liquid, adsorption screen debris, and some solid particles carried by the exhaust gas. The filtration area intercepts these solid particles through the filter plate 32 to prevent them from entering the area where the water pump 33 is located and affecting the service life of the water pump 33.

[0051] Specifically, the exhaust gas is injected into the bottom of the tower body 1 through the induced draft fan connected to the air inlet pipe 2, and the exhaust gas contacts the absorption liquid at the bottom of the tower body 1, and the harmful gas therein contacts the absorption liquid further, and the acidic components in the exhaust gas react chemically with the alkaline substances in the absorption liquid, and are partially absorbed into the solution, and some solid particles in the exhaust gas are also adsorbed by the absorption liquid. By starting the water pump 33, the absorption liquid in the circulation box 4 is discharged from the drip port below the spray pipe 7 through the water pipe 34, so that it is evenly distributed in the tower body 1 and falls, so that the exhaust gas contacts the absorption liquid in countercurrent, and the acidic components in the exhaust gas are further absorbed. After the absorption liquid falls above the distribution plate 10, it will be secondary distributed through the distribution plate 10. The cloth can improve the treatment efficiency of the absorption liquid on the waste gas, and when the absorption liquid flows through the set packing layer 6, the contact area between the absorption liquid and the waste gas can be increased, and the efficiency of the absorption liquid in treating the waste gas can be further improved. The adsorption screen in the packing layer 6 can also adsorb some harmful substances in the waste gas. The absorption liquid falling into the bottom of the tower body 1 is refluxed to the circulation box 4 through the reflux pipe 30. Due to the increase in the internal space of the circulation box 4, the liquid flow will slow down, and some solid particles in the absorption liquid will settle in the sedimentation box 35, and flow into the area where the filter plate 32 is located by overflowing the partition 31. After being filtered by the filter plate 32, it is pumped out by the water pump 33 for spraying again, so that the absorption liquid can be recycled.

[0052] Example 4

[0053] See also Figure 2 , Fig. 9As shown, the collecting mechanism includes a rotating rod 26, which is rotatably connected to the bottom of the inner wall of the tower body 1, a dividing plate 27 is fixedly connected to the top of the rotating rod 26, a plurality of connecting pocket plates 28 are fixedly connected to the outer wall of the dividing plate 27, and a plurality of scrapers 29 are fixedly connected to the bottom of the inner wall of the tower body 1.

[0054] Furthermore, by setting up a collecting mechanism, when the induced draft fan connected to the air inlet pipe 2 injects the exhaust gas into the bottom of the tower body 1, the exhaust gas enters tangentially and pushes the pocket plate 28 in the absorption liquid, causing the pocket plate 28 to drive the dividing plate 27 to rotate. The exhaust gas entering the absorption liquid will form bubbles, and the bubbles will contact the inclined surface of the pocket plate 28 during the rising process, further pushing the pocket plate 28 to accelerate the rotation, so that the bubbles are evenly distributed under the dividing plate 27. When the bubbles rise, they will be divided into a large number of small bubbles by the dividing plate 27, so as to increase the contact area between the exhaust gas and the absorption liquid, thereby improving the effect of treating the exhaust gas. When the dividing plate 27 rotates, it will drive the scraper 29 on the rotating rod 26 to rotate. Through the continuous rotation of the scraper 29, the solid particles precipitated in the absorption liquid can be pushed out of the reflux pipe 30 into the tower body 1 and fall into the sedimentation box 35 for collection, so as to facilitate centralized treatment, reduce the frequency of cleaning and maintenance of the tower body 1, and reduce the maintenance burden of the staff.

[0055] How it works

[0056] When in use, the exhaust gas is injected into the bottom of the tower body 1 through the induced draft fan connected to the air inlet pipe 2, and the exhaust gas contacts the absorption liquid at the bottom of the tower body 1, and the harmful gas therein contacts further with the absorption liquid, and the acidic components in the exhaust gas react chemically with the alkaline substances in the absorption liquid, and are partially absorbed into the solution, and some solid particles in the exhaust gas are also adsorbed by the absorption liquid. By starting the water pump 33, the absorption liquid in the circulation box 4 is discharged from the drip port under the spray pipe 7 through the water pipe 34, so that it is evenly distributed in the tower body 1 and falls, so that the exhaust gas and the absorption liquid are in countercurrent contact, and the acidic components in the exhaust gas are further absorbed. After the absorption liquid falls above the distribution plate 10, it will be distributed twice through the distribution plate 10 to improve the treatment efficiency of the absorption liquid for the exhaust gas, and the absorption liquid flows through When the packing layer 6 is set, the contact area between the absorption liquid and the exhaust gas can be increased, and the efficiency of the absorption liquid in treating the exhaust gas can be further improved. The adsorption screen in the packing layer 6 can also adsorb some harmful substances in the exhaust gas. The absorption liquid falling into the bottom of the tower body 1 is refluxed to the circulation box 4 through the reflux pipe 30. As the internal space of the circulation box 4 becomes larger, the flow of the liquid will slow down. Some solid particles in the absorption liquid will settle in the sedimentation box 35 and flow into the area where the filter plate 32 is located by overflowing the partition 31. After being filtered by the filter plate 32, it is pumped again by the water pump 33 for spraying, so that the absorption liquid can be recycled. When the top of the distribution plate 10 is blocked, the flow of the distribution plate 10 will decrease, resulting in more and more absorption liquid above the distribution plate 10. The liquid collection increases the load-bearing capacity of the distribution plate 10, thereby causing the distribution plate 10 to sink. During the sinking process of the distribution plate 10, the first spring 12 between the distribution plate 10 and the dredging plate 11 will be compressed first, so that the dredging plate 11 is inserted into the drip hole in the distribution plate 10 to dredge the drip hole. At the same time, due to the insertion of the dredging plate 11, the drip holes of the distribution plate 10 are completely blocked, so that the absorption liquid above the distribution plate 10 is still in a state of gathering more and more, and the distribution plate 10 is still in a state of continuous decline, thereby forcing the dredging plate 11 to compress the third spring 17 until the movable ring 13 on the distribution plate 10 contacts the positioning ring 18. At this time, the positioning ring 18 will lift the movable ring 13, so that the distribution plate 10 and the movable ring 13 are misaligned and a gap appears, so that the distribution plate 10 The absorption liquid collected above will be discharged from the gap together with the impurities cleaned in the drip holes, and while the distribution plate 10 sinks due to the weight of the liquid, the scraper 21 on the snap ring 20 will be driven axially on the inner wall of the limit ring 19 by the snap ring 20, so that the sliding rod 22 connected to the snap ring 20 through the connecting rod 23 will also be lowered, causing the sliding rod 22 to slide down inside the support tube 9, and the connection relationship between the spiral groove 24 and the slider 25 is relatively limited, forcing the sliding rod 22 to rotate synchronously with the spiral path of the spiral groove 24 during the sliding process, thereby driving the scraper 21 on the snap ring 20 to rotate together, and the rotation of the arc scraper 21 will push the blockage to a position close to the gap, so as to facilitate discharge from the gap together with the absorption liquid.When the gravity above the subsequent distribution plate 10 returns to normal, the tension of the first spring 12 will separate the distribution plate 10 from the dredging plate 11, and restore the effect of distributing droplets. The tension of the third spring 17 lifts the distribution plate 10 above the dredging plate 11, so that the movable ring 13 is separated from the positioning ring 18, and the movable ring 13 is reset under the gravity of the second spring 16 and the movable ring 13 itself. When the exhaust fan connected to the air intake pipe 2 injects the exhaust gas into the bottom of the tower body 1, the exhaust gas enters tangentially and pushes the pocket plate 28 in the absorption liquid, so that the pocket plate 28 drives the dividing plate 27 to rotate, and the waste gas entering the absorption liquid The gas will form bubbles, and the bubbles will contact the inclined surface of the scoop plate 28 during the rising process, further pushing the scoop plate 28 to accelerate the rotation, so that the bubbles are evenly distributed under the dividing plate 27. When the bubbles rise, they will be divided into a large number of small bubbles by the dividing plate 27 to increase the contact area between the exhaust gas and the absorption liquid, so as to improve the effect of treating the exhaust gas. When the dividing plate 27 rotates, it will drive the scraper 29 on the rotating rod 26 to rotate. Through the continuous rotation of the scraper 29, the solid particles precipitated in the absorption liquid can be pushed out of the tower body 1 from the reflux pipe 30 and fall into the precipitation box 35 for collection, so as to facilitate centralized treatment.

[0057] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A low carbonic acid tower for the production of tertiary carbonic acid, characterized in that: It comprises a tower body (1), wherein the inner wall of the tower body (1) is provided with a plurality of groups of support frames (5), the interior of each of the support frames (5) is provided with a packing layer (6), and a distribution plate (10) is provided below each of the support frames (5); The inner wall of the tower body (1) is provided with a spray mechanism at a position between the packing layer (6) and the distribution plate (10) for circulating and spraying the absorption liquid; A cleaning mechanism is provided above each group of the distribution plates (10) for cleaning blockage of the distribution plates (10); A collecting mechanism is provided at the bottom of the inner wall of the tower body (1) for collecting some solid particles in the absorption liquid; The cleaning mechanism comprises a support frame (8), the support frame (8) is fixedly connected to the inner wall of the tower body (1) at a position below the distribution plate (10), the top of the support frame (8) is fixedly connected to a support tube (9), and the distribution plate (10) is slidably connected to the outer wall of the support tube (9), the outer wall of the support tube (9) is slidably connected to a dredging plate (11) at a position below the distribution plate (10), and the support tube (9) is movably sleeved with a first spring (12) at a position between the dredging plate (11) and the distribution plate (10); The cleaning mechanism further comprises a movable ring (13), the movable ring (13) being slidably connected to the outer wall of the distribution plate (10), a plurality of groups of sliding buckles (14) being fixedly connected to the top of the movable ring (13), and the sliding buckles (14) being evenly distributed in a ring shape, a sliding column (15) being fixedly connected to the position of each group of sliding buckles (14) at the top of the distribution plate (10), and each group of sliding columns (15) being slidably connected to the inner wall of the sliding buckle (14) at the corresponding position, and the outer wall of the sliding column (15) being movably sleeved with a second spring (16); The cleaning mechanism also includes a positioning ring (18), the positioning ring (18) is fixedly connected to the inner wall of the tower body (1) at a position below the movable ring (13), and the outer wall of the support tube (9) is located between the support frame (8) and the dredging plate (11) and is provided with a third spring (17); The cleaning mechanism further comprises a limiting ring (19), wherein the limiting ring (19) is coaxially fixedly connected to the top of the distribution plate (10) and is clearance-matched with the support tube (9), the inner wall of the limiting ring (19) is rotatably connected to a retaining ring (20), the outer wall of the retaining ring (20) is fixedly connected to a scraper (21), and the scraper (21) is in contact with the surface of the distribution plate (10).

2. A low carbonic acid tower for tertiary carbonic acid production according to claim 1, characterized in that: The cleaning mechanism also includes a slide rod (22), the slide rod (22) is slidably connected to the inner wall of the support tube (9), the top of the slide rod (22) is fixedly connected to the clamping ring (20) through a connecting rod (23), the outer wall of the slide rod (22) is provided with a spiral groove (24), the inner wall of the support tube (9) is fixedly connected to a slide block (25) at a position corresponding to the spiral groove (24), and the slide block (25) is slidably connected to the inner wall of the spiral groove (24).

3. A low carbonic acid tower for the production of tertiary carbonic acid according to claim 1, characterized in that: The spray mechanism comprises a circulation box (4), the circulation box (4) is fixedly connected to one side of the outer wall of the tower body (1), the circulation box (4) is connected to the inside of the tower body (1) through a return pipe (30), the inner wall of the tower body (1) is fixedly connected to a spray pipe (7) below each group of support frames (5), the inside of the circulation box (4) is fixedly connected to a water pump (33), and the water pump (33) is connected to the spray pipe (7) through a water pipe (34).

4. A low carbonic acid tower for the production of tertiary carbonic acid according to claim 3, characterized in that: The spray mechanism further comprises a filter plate (32), wherein the filter plate (32) is fixedly connected to the inner wall of the circulation box (4) at a position outside the water pump (33), the inner wall of the circulation box (4) is fixedly connected to a partition plate (31), and the inner wall of the circulation box (4) is provided with a sedimentation box (35) at a position below the return pipe (30).

5. A low carbonic acid tower for producing tertiary carbonic acid according to claim 1, characterized in that: An air inlet pipe (2) is fixedly connected to the bottom of the tower body (1) for connecting to an induced draft fan to receive waste gas, and an exhaust pipe (3) is fixedly connected to the top of the tower body (1) for discharging treated gas.

6. A low carbonic acid tower for tertiary carbonic acid production according to claim 1, characterized in that: The collecting mechanism comprises a rotating rod (26) which is rotatably connected to the bottom of the inner wall of the tower body (1); a partition plate (27) is fixedly connected to the top of the rotating rod (26); and a plurality of connecting pocket plates (28) are fixedly connected to the outer wall of the partition plate (27).

7. A low carbonic acid tower for the production of tertiary carbonic acid according to claim 6, characterized in that: A plurality of groups of scrapers (29) are fixedly connected to the bottom of the rotating rod (26), and the scrapers (29) are in contact with the bottom of the inner wall of the tower body (1).

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