Multi-level efficient acid mist absorption tower and absorption method

Abstract

The invention relates to the technical field of acid mist absorption and purification, in particular to a multi-level efficient acid mist absorption tower and an absorption method.The multi-level efficient acid mist absorption tower comprises a base, a tower body and a tower top are installed on the base, the interior of the base is divided into a first storage cavity, a second storage cavity and a third storage cavity, and the interior of the tower body is divided into a first reaction cavity, a second reaction cavity and a third reaction cavity; purified water is stored in the first storage cavity and the second storage cavity, alkali liquor is stored in the third storage cavity, and the first storage cavity, the second storage cavity and the third storage cavity are communicated with the first reaction cavity, the second reaction cavity and the third reaction cavity respectively; a gas inlet pipe and a spraying mechanism are mounted on the tower body, the gas inlet pipe is communicated with the first reaction cavity, filler layers are mounted in the first reaction cavity, the second reaction cavity and the third reaction cavity, and a demisting layer is mounted in the tower top. The acid mist absorption tower has the effects of reducing the use of alkali liquor, reducing the production cost, reducing the occupied area of the acid mist absorption tower and improving the applicability of the acid mist absorption tower.

Description

Technical Field

[0001] The present invention relates to the technical field of acid mist absorption and purification, and in particular to a multi-level high-efficiency acid mist absorption tower and an absorption method. Background Art

[0002] Acid mist generally refers to misty acid substances. In the air, the particles of acid mist are very small, smaller than those of water mist and have a higher humidity than smoke. It is a substance between flue gas and water mist and has strong corrosiveness. Currently, the main methods for controlling acid gas emissions include liquid absorption method, solid adsorption method, filtration method, electrostatic demisting method, mechanical demisting method, covering method, etc.

[0003] During the extraction process of zirconia in monazite, a large amount of acid mist is generated. In the prior art, the treatment of acid mist is mainly carried out by an acid mist absorption tower. However, the main acid mist absorption liquid in the prior art is alkali solution. Because a large amount of acid mist is generated during the extraction process of zirconia, a large amount of alkali solution is required for neutralization, resulting in a relatively high cost for purchasing alkali solution and increasing the production cost. Summary of the Invention

[0004] In order to reduce the production cost, the present application provides a multi-level high-efficiency acid mist absorption tower and an absorption method.

[0005] In a first aspect, a multi-level high-efficiency acid mist absorption tower provided by the present application adopts the following technical solution: A multi-level high-efficiency acid mist absorption tower includes a base, on which a tower body and a tower top are installed. The base is divided into a first storage chamber, a second storage chamber and a third storage chamber. Drain pipes are installed in the first storage chamber, the second storage chamber and the third storage chamber. The tower body is divided into a first reaction chamber, a second reaction chamber and a third reaction chamber. The third reaction chamber is communicated with the tower top. Pure water is stored in the first storage chamber and the second storage chamber, and alkali solution is stored in the third storage chamber. The first storage chamber, the second storage chamber and the third storage chamber are respectively communicated with the first reaction chamber, the second reaction chamber and the third reaction chamber. An air inlet pipe and a spraying mechanism are installed on the tower body. The air inlet pipe is communicated with the first reaction chamber. Packing layers are installed in the first reaction chamber, the second reaction chamber and the third reaction chamber. A demisting layer is installed in the tower top.

[0006] By adopting the above technical solution, when absorbing and purifying acid mist, the acid mist enters the first reaction chamber from the air inlet pipe. At this time, the spraying mechanism sprays pure water to absorb and dissolve the acid mist, absorbing a part of the acid mist. Then the acid mist enters the second reaction chamber through the first reaction chamber. At this time, the spraying mechanism in the second reaction chamber continues to spray pure water to further absorb and dissolve the acid mist. The acid mist that has been further absorbed and dissolved enters the third reaction chamber. At this time, the spraying mechanism in the third reaction chamber sprays an alkali solution to react with the acid mist for neutralization, thereby absorbing and purifying the acid mist; through three times of absorption, pure water is used to absorb and dissolve the acid mist in the first two times, thereby greatly reducing the amount of acid mist entering the third reaction chamber, reducing the use of alkali solution, reducing production costs, and by separating different spaces in an acid mist absorption tower, reducing the usage of acid mist absorption towers, thereby reducing the floor area, and is suitable for use in places with limited space; at the same time, the setting of the packing layer increases the contact area between the acid mist and pure water and the alkali solution, prolongs the residence time of the acid mist, and thereby improves the absorption efficiency; at the same time, the setting of the demisting layer realizes water-liquid separation, thereby further reducing the probability that the acidic solution in the acid mist is discharged from the acid mist absorption tower with the air flow.

[0007] Optionally, a first air guiding channel is spaced between the first reaction chamber and the second reaction chamber. The first air guiding channel is respectively communicated with the first reaction chamber and the second reaction chamber. A second air guiding channel is spaced between the second reaction chamber and the third reaction chamber. The second air guiding channel is respectively communicated with the second reaction chamber and the third reaction chamber. First communication grooves are respectively formed in the bottom walls of the first air guiding channel and the second air guiding channel. The first communication grooves are respectively communicated with the first storage chamber and the second storage chamber. One-way valves are installed in the first communication grooves and the second communication grooves. Two observation windows are further installed on the tower body for observing the height of the accumulated liquid at the bottoms of the first air guiding channel and the second air guiding channel.

[0008] By adopting the above technical solution, the acid mist absorbed and dissolved by pure water in the first reaction chamber enters the first air guiding channel, then enters the second reaction chamber through the first air guiding channel, and the acid mist absorbed and dissolved by pure water in the second reaction chamber enters the second air guiding channel, and then enters the third reaction chamber through the second air guiding channel; the arrangement of the first air guiding channel and the second air guiding channel not only realizes the connection of the first reaction chamber, the second reaction chamber and the third reaction chamber, but also reduces the probability of solution mixing in the first reaction chamber, the second reaction chamber and the third reaction chamber, thereby reducing the probability of the absorption effect being reduced due to solution mixing in the first reaction chamber, the second reaction chamber and the third reaction chamber; at the same time, there is still a small amount of solution in the first reaction chamber entering the first air guiding channel. When the liquid level of the solution at the bottom of the first air guiding channel reaches the connection between the first air guiding channel and the second reaction chamber, the one-way valve is opened to drain the accumulated liquid in the first air guiding channel into the first storage chamber, further reducing the probability of solution mixing.

[0009] Optionally, a speed regulating mechanism is further installed in the tower body, and the speed regulating mechanism includes a plurality of wind blocking plates, and the plurality of wind blocking plates are all installed in the first air guiding channel and the second air guiding channel through adjusting components.

[0010] By adopting the above technical solution, since the widths of the first air guiding channel and the second air guiding channel are relatively narrow, the flow rate of the acid mist entering the first air guiding channel and the second air guiding channel will increase, which will shorten the subsequent absorption and purification time and reduce the purification effect of the acid mist absorption tower; the wind blocking plates change the flow direction of the acid mist multiple times, reducing the flow rate of the acid mist, thereby reducing the probability that the absorption and purification time is shortened due to the fast flow rate of the acid mist and the purification effect of the acid mist absorption tower is reduced.

[0011] Optionally, the adjusting component includes a plurality of fixing blocks, the plurality of fixing blocks are respectively fixedly connected to the side walls of the first air guiding channel and the second air guiding channel, through holes are formed in the fixing blocks, a plurality of first limiting grooves are formed in the side walls of the through holes, a rotating shaft is rotatably connected in the through holes, the rotating shaft is fixedly connected to the wind blocking plate, a second limiting groove is formed in the rotating shaft, and a limiting block is jointly inserted in the second limiting groove and the first limiting groove.

[0012] By adopting the above technical solution, the arrangement of the rotating shaft enables the flow rate of the acid mist to be adjusted by adjusting the angle of the wind blocking plate. When adjusting the flow rate of the acid mist, rotate the rotating shaft, the rotating shaft drives the wind blocking plate to rotate, and then insert the limiting block into the connected first limiting groove and second limiting groove to fix the wind blocking plate, thereby realizing the adjustment of the acid mist flow rate.

[0013] Optionally, the spraying mechanism includes three pressure pumps. All three pressure pumps are respectively communicated with the first storage chamber, the second storage chamber, and the third storage chamber through a filtering component. A water supply pipe is installed at the water outlet end of each of the three pressure pumps. One end of the water supply pipe away from the pressure pump is fixedly connected to a water distribution pipe. One end of each of the three water distribution pipes located in the first reaction chamber, the second reaction chamber, and the third reaction chamber is fixedly connected with a plurality of spray heads.

[0014] By adopting the above technical solution, when spraying pure water and alkali solution, the pressure pumps are started. The pressure pumps spray the pure water and alkali solution in the filter tank into the first reaction chamber, the second reaction chamber, and the third reaction chamber respectively through the water supply pipes, the water distribution pipes, and the spray heads, thereby realizing the spraying of pure water and alkali solution and realizing circulation.

[0015] Optionally, the filtering component includes a filter tank. One end of the filter tank is open. A water inlet pipe is fixedly connected to the filter tank. A plurality of sliding grooves are formed on the end face of the open end of the filter tank. A filter plate is inserted jointly in two symmetrically arranged sliding grooves. A cover plate is rotatably connected to the open end of the filter tank. A return water pipe is fixedly connected to the end of the filter tank away from the water inlet pipe. One end of the return water pipe away from the filter tank is communicated with the water inlet end of the pressure pump.

[0016] By adopting the above technical solution, the setting of the filter plate realizes the filtration of solid substances in the solution, thereby reducing the probability of solid substances entering the spray heads and blocking the spray heads; at the same time, the filter plate is installed in a plug-in manner, which facilitates the replacement of the filter plate and simplifies the replacement process.

[0017] Optionally, a gas guiding mechanism is installed in each of the first reaction chamber, the second reaction chamber, and the third reaction chamber. The gas guiding mechanism includes a gas guiding cover. A fixing component is installed on the gas guiding cover. The fixing component includes two fixing bolts. Two ends of each of the two fixing bolts are respectively threadedly connected to two ends of the gas guiding cover. An abutting block is fixedly connected to the end face of each of the two fixing bolts away from each other; the top wall of the gas guiding cover is arc-shaped and is provided with a plurality of through gas guiding holes.

[0018] By adopting the above technical solution, when installing the gas guiding cover, manually rotate the fixing bolts, and the fixing bolts drive the abutting blocks to abut tightly against the inside of the tower body; since the acid mist entering the tower body directly rises to react with the sprayed pure water or alkali solution, there is a phenomenon of uneven distribution during the rising process of the acid mist, which affects the purification effect of the acid mist absorption tower; the setting of the gas guiding cover enables the acid mist entering the first reaction chamber, the second reaction chamber, and the third reaction chamber to rise evenly through the gas guiding holes, thereby realizing the even rising of the acid mist.

[0019] Optionally, the air guiding mechanism further includes a plurality of air guiding pipes, and the plurality of air guiding pipes are all fixedly connected to the end face of the air guiding cover close to the top of the tower, and the plurality of air guiding pipes are respectively communicated with the plurality of air guiding holes.

[0020] By adopting the above technical solution, since the top wall of the air guiding cover is an arc surface, when the sprayed pure water and alkali solution fall on the air guiding cover, they will flow towards the end of the air guiding cover, so that the water flow rates of the air guiding holes at the end and the air guiding holes in the middle part are different, and thus the exhaust gas volumes of the air guiding holes are different, that is, there is still an uneven distribution phenomenon during the upward movement of the acid mist; the arrangement of the air guiding pipes makes the sprayed pure water and alkali solution not flow through the air guiding holes when falling on the air guiding cover, so that the upward amount of acid mist in each air guiding hole remains consistent, reducing the probability of uneven distribution during the upward movement of the acid mist.

[0021] Optionally, the air guiding mechanism further includes a plurality of waterproof covers, and the plurality of waterproof covers are respectively fixedly connected to one end of the plurality of air guiding pipes away from the air guiding cover. The waterproof covers are conical, and a drainage ring is fixedly connected to one end of the waterproof cover close to the air guiding cover. A collection groove is formed on the end face of the drainage ring away from the air guiding cover, and a drainage groove is formed on the side wall of the collection groove.

[0022] By adopting the above technical solution, when purifying the acid mist, there will still be sprayed pure water and alkali solution entering the air guiding pipes, which will affect the upward movement of the acid mist. The arrangement of the waterproof covers shields the top ends of the air guiding pipes, reducing the probability of the sprayed pure water and alkali solution directly entering the air guiding pipes. At the same time, when the sprayed pure water and alkali solution fall on the waterproof covers, they flow along the side walls of the waterproof covers into the collection groove, and then are discharged through the drainage grooves, thereby reducing the probability of the sprayed pure water and alkali solution entering the air guiding pipes and affecting the upward movement of the acid mist.

[0023] In the second aspect, a multi-level high-efficiency acid mist absorption tower absorption method provided by the present application adopts the following technical solution: A multi-level high-efficiency acid mist absorption tower absorption method includes the following steps: Step 1: The acid mist during the production of zirconia enters the first reaction chamber through the air inlet pipe. At this time, the spray head in the first reaction chamber sprays pure water to absorb and dilute the acid mist. Step 2: The acid mist after absorption and dilution enters the second reaction chamber through the first air guiding channel. At this time, the spray head in the second reaction chamber sprays pure water to further absorb and dilute the acid mist. Step 3: The acid mist after two rounds of absorption and dilution enters the third reaction chamber through the second air guiding channel. At this time, the spray head in the third reaction chamber sprays alkali solution to carry out a neutralization reaction with the acid mist. Step 4: The exhausted gas after neutralization enters the top of the tower and is discharged after being dewatered by the demisting layer.

[0024] In summary, the present application includes the following beneficial technical effects: 1. When absorbing and purifying acid mist, the acid mist enters the first reaction chamber from the air inlet pipe. At this time, the spraying mechanism sprays pure water to absorb and dissolve the acid mist, absorbing a part of the acid mist. Then the acid mist enters the second reaction chamber through the first reaction chamber. At this time, the spraying mechanism in the second reaction chamber continues to spray pure water to further absorb and dissolve the acid mist. The acid mist that has been further absorbed and dissolved then enters the third reaction chamber. At this time, the spraying mechanism in the third reaction chamber sprays an alkali solution to react with the acid mist, thereby absorbing and purifying the acid mist. Through three times of absorption, pure water is used to absorb and dissolve the acid mist in the first two times, thereby greatly reducing the amount of acid mist entering the third reaction chamber, reducing the use of alkali solution, reducing production costs, and by separating different spaces in an acid mist absorption tower, reducing the use amount of acid mist absorption towers, thereby reducing the floor area, and being suitable for use in places with limited space; 2. Since the widths of the first air guiding channel and the second air guiding channel are relatively narrow, the flow rate of the acid mist entering the first air guiding channel and the second air guiding channel will increase, and then the subsequent absorption and purification time will be shortened, reducing the purification effect of the acid mist absorption tower; the wind blocking plate changes the flow direction of the acid mist multiple times, reducing the flow rate of the acid mist, thereby reducing the probability that the absorption and purification time is shortened due to the relatively fast flow rate of the acid mist, reducing the purification effect of the acid mist absorption tower; 3. Since the acid mist entering the tower body directly rises to react with the sprayed pure water or alkali solution, there is a phenomenon of uneven distribution during the rising process of the acid mist, which affects the purification effect of the acid mist absorption tower; the setting of the air guiding cover enables the acid mist entering the first reaction chamber, the second reaction chamber and the third reaction chamber to rise evenly through the air guiding holes, thereby realizing the even rising of the acid mist; 4. Since the top wall of the air guiding cover is an arc surface, the pure water and alkali solution sprayed down will flow towards the end of the air guiding cover when they fall on the air guiding cover, resulting in different water flow rates at the end air guiding holes and the middle air guiding holes, and thus different exhaust gas volumes of the air guiding holes, that is, there is still a phenomenon of uneven distribution during the rising process of the acid mist; the setting of the air guiding pipe enables the sprayed pure water and alkali solution not to flow through the air guiding holes when falling on the air guiding cover, thereby enabling the rising amount of acid mist in each air guiding hole to be consistent, reducing the probability of uneven distribution during the rising process of the acid mist. Description of the Drawings

[0025] Figure 1 is a cross-sectional view of the multi-level high-efficiency acid mist absorption tower in the embodiment of the present application; Figure 2 is of the present application Figure 1 the enlarged view of part A; Figure 3It is a schematic structural diagram of the speed regulation mechanism in the embodiment of the present application; Figure 4 It is a top view of the filter box in the embodiment of the present application; Figure 5 It is a cross-sectional view of the spraying mechanism in the embodiment of the present application; Figure 6 For the present application Figure 5 An enlarged view of part B; Figure 7 It is a schematic structural diagram of the drainage ring in the embodiment of the present application.

[0026] Reference numerals: 1, base; 11, first storage cavity; 12, second storage cavity; 13, third storage cavity; 14, drain pipe; 2, tower body; 21, first reaction cavity; 22, second reaction cavity; 23, third reaction cavity; 24, first air guide channel; 25, second air guide channel; 26, first communication groove; 27, second communication groove; 28, one-way valve; 3, tower top; 4, speed regulation mechanism; 41, wind blocking plate; 42, adjustment assembly; 421, fixed block; 422, rotating shaft; 423, limiting block; 424, rotating groove; 425, first limiting groove; 426, second limiting groove; 5, spraying mechanism; 51, pressure pump; 52, water supply pipe; 53, water distribution pipe; 54, nozzle; 55, filtering assembly; 551, filter box; 552, water supply pipe; 553, cover plate; 554, filter plate; 555, return water pipe; 556, sliding groove; 6, air guiding mechanism; 61, air guiding cover; 611, air guiding hole; 62, air guiding pipe; 63, waterproof cover; 64, drainage ring; 641, collection groove; 642, drainage groove; 65, fixing assembly; 651, fixing bolt; 652, abutting block; 7, air inlet pipe; 8, packing layer; 9, demisting layer. Detailed implementation manners

[0027] The following further elaborates on the present application Figures 1 - 7 in conjunction with the attached drawings.

[0028] The embodiment of the present application discloses a multi-level high-efficiency acid mist absorption tower.

[0029] Refer to Figure 1, A multi-level efficient acid mist absorption tower, including a base 1, a tower body 2 is installed on the base 1, one end of the tower body 2 away from the base 1 is fixedly connected with a tower top 3, the inside of the base 1 is divided into a first storage cavity 11, a second storage cavity 12 and a third storage cavity 13, drain pipes 14 are installed in the first storage cavity 11, the second storage cavity 12 and the third storage cavity 13, pure water is stored in the first storage cavity 11 and the second storage cavity 12, and alkali solution is stored in the third storage cavity 13; the inside of the tower body 2 is divided into a first reaction cavity 21, a second reaction cavity 22 and a third reaction cavity 23, the first reaction cavity 21, the second reaction cavity 22 and the third reaction cavity 23 are respectively communicated with the first storage cavity 11, the second storage cavity 12 and the third storage cavity 13; a first air guiding channel 24 is opened between the first reaction cavity 21 and the second reaction cavity 22, a second air guiding channel 25 is opened between the second reaction cavity 22 and the third reaction cavity 23, and the third reaction cavity 23 is communicated with the tower top 3; an air inlet pipe 7 and a spraying mechanism 5 are installed on the tower body 2, the air inlet pipe 7 is communicated with the first reaction cavity 21, packing layers 8 are installed in the first reaction cavity 21, the second reaction cavity 22 and the third reaction cavity 23, and a demisting layer 9 is installed in the tower top 3.

[0030] When carrying out the absorption and purification of acid mist, the acid mist enters the first reaction cavity 21 from the air inlet pipe 7. At this time, the spraying mechanism 5 sprays pure water to dissolve the acid mist and absorb a part of the acid mist. Then the acid mist enters the second reaction cavity 22 through the first air guiding channel 24. At this time, the spraying mechanism 5 in the second reaction cavity 22 continues to spray pure water to further absorb and dissolve the acid mist. The acid mist that has been further absorbed and dissolved enters the third reaction cavity 23 through the second air guiding channel 25. At this time, the spraying mechanism 5 in the third reaction cavity 23 sprays alkali solution to react with the acid mist for neutralization, thereby absorbing and purifying the acid mist; through three times of absorption, pure water is used for absorption and dissolution of the acid mist in the first two times, thus greatly reducing the amount of acid mist entering the third reaction cavity 23, reducing the use of alkali solution, lowering the production cost, and by separating different spaces in an acid mist absorption tower, reducing the usage amount of the acid mist absorption tower, thereby reducing the floor area and being suitable for use in places with limited space; at the same time, the settings of the first air guiding channel 24 and the second air guiding channel 25 not only realize the connection of the first reaction cavity 21, the second reaction cavity 22 and the third reaction cavity 23, but also reduce the probability of solution mixing in the first reaction cavity 21, the second reaction cavity 22 and the third reaction cavity 23, thereby reducing the probability of the absorption effect being reduced due to solution mixing in the first reaction cavity 21, the second reaction cavity 22 and the third reaction cavity 23; and the setting of the packing layer 8 increases the contact area between the acid mist and pure water and alkali solution, prolongs the residence time of the acid mist, and thereby improves the absorption efficiency; at the same time, the setting of the demisting layer 9 realizes the separation of water and liquid, thereby further reducing the probability of the acidic solution in the acid mist being discharged from the acid mist absorption tower with the air flow.

[0031] ReferenceFigure 2 On the bottom wall of the first air guide channel 24, a first communication groove 26 communicating with the first storage cavity 11 is formed. On the bottom wall of the second air guide channel 25, a second communication groove 27 communicating with the second storage cavity 12 is formed. One-way valves 28 are installed in both the first communication groove 26 and the second communication groove 27. Two observation windows for observing the liquid accumulation height at the bottom of the first air guide channel 24 and the second air guide channel 25 are also installed on the tower body 2.

[0032] A small amount of solution in the first reaction cavity 21 and the second reaction cavity 22 will enter the first air guide channel 24 and the second air guide channel 25 respectively. When the solution heights at the bottoms of the first air guide channel 24 and the second air guide channel 25 reach the communication positions between the first air guide channel 24 and the second reaction cavity 22 and between the second air guide channel 25 and the third reaction cavity 23 respectively, the one-way valves 28 are opened, and the liquid accumulations in the first air guide channel 24 and the second air guide channel 25 are discharged into the first storage cavity 11 and the second storage cavity 12 respectively, further reducing the probability of solution mixing.

[0033] Reference Figure 2 and Figure 3 Speed regulating mechanisms 4 are installed in both the first air guide channel 24 and the second air guide channel 25. The speed regulating mechanism 4 includes an adjusting assembly 42 and a plurality of wind blocking plates 41. The plurality of wind blocking plates 41 are installed in the first air guide channel 24 and the second air guide channel 25 through the adjusting assembly 42. The adjusting assembly 42 includes a plurality of fixing blocks 421. The plurality of fixing blocks 421 are respectively fixedly connected to the side walls on both sides of the first air guide channel 24 and the second air guide channel 25. Through rotation grooves 424 are formed on the side walls at both ends of the fixing block 421. A plurality of first limiting grooves 425 are formed on the side wall of the rotation groove 424. A rotating shaft 422 is rotatably connected in the rotation groove 424. The rotating shaft 422 is fixedly connected to the wind blocking plate 41. Second limiting grooves 426 are formed on the end faces at both ends of the rotating shaft 422. A limiting block 423 is jointly inserted into the mutually communicating first limiting groove 425 and the second limiting groove 426.

[0034] Due to the narrow widths of the first air guiding channel 24 and the second air guiding channel 25, the flow rate of the acid mist entering the first air guiding channel 24 and the second air guiding channel 25 will increase, which will shorten the subsequent absorption and purification time and reduce the purification effect of the acid mist absorption tower; the wind blocking plate 41 changes the flow direction of the acid mist multiple times, reducing the flow rate of the acid mist, thereby reducing the probability of shortening the absorption and purification time due to the fast flow rate of the acid mist and reducing the purification effect of the acid mist absorption tower; at the same time, the setting of the rotating shaft 422 realizes the adjustment of the angle of the wind blocking plate 41, which facilitates the adjustment of the flow rate of the acid mist in the first air guiding channel 24 and the second air guiding channel 25. When adjusting the flow rate of the acid mist, rotate the rotating shaft 422, the rotating shaft 422 drives the wind blocking plate 41 to rotate, and then insert the limit block 423 into the connected first limit groove 425 and second limit groove 426 to fix the wind blocking plate 41, thereby realizing the adjustment of the acid mist flow rate.

[0035] Reference Figure 4 and Figure 5 As shown in FIGS. 5 and 6, the spraying mechanism 5 includes a filtering component 55. The filtering component 55 includes three filtering boxes 551. The three filtering boxes 551 are all installed on the ground. One end of the filtering box 551 is open. A plurality of sliding grooves 556 are formed on the end surface of the open end of the filtering box 551. A filtering plate 554 is inserted into the two symmetrically arranged sliding grooves 556 together. One end of the filtering box 551 close to the base 1 is fixedly connected with a water inlet pipe 552. The open end of the filtering box 551 is rotatably connected with a cover plate 553. A pressure pump 51 is installed on the end surface of the cover plate 553 away from the filtering box 551. A water return pipe 555 is fixedly connected to the water inlet of the pressure pump 51. One end of the water return pipe 555 away from the pressure pump 51 is located in the filtering box 551. A water supply pipe 52 is fixedly connected to the water outlet of the pressure pump 51. One end of the water supply pipe 52 away from the pressure pump 51 is fixedly connected with a water distribution pipe 53. The three water distribution pipes 53 are respectively located in the first reaction chamber 21, the second reaction chamber 22 and the third reaction chamber 23. A plurality of spray heads 54 are fixedly connected to the three water distribution pipes 53.

[0036] When spraying pure water and alkali solution, the pressure pump 51 is started, so that the pure water and alkali solution in the filtering box 551 are filtered by the filtering plate 554 and discharged from the water return pipe 555, and then flow through the pressure pump 51 and the water supply pipe 52 to the water distribution pipe 53 and are sprayed out through the spray heads 54; the setting of the filtering plate 554 realizes the filtering of the solid substances in the solution, thereby reducing the probability of solid substances entering the spray heads 54 and blocking the spray heads 54; at the same time, the filtering plate 554 is installed in a plug-in manner, which facilitates the replacement of the filtering plate 554 and simplifies the replacement process.

[0037] Reference Figure 6, a gas guiding mechanism 6 is installed in each of the first reaction chamber 21, the second reaction chamber 22, and the third reaction chamber 23. The gas guiding mechanism 6 includes a gas guiding cover 61 and a fixing component 65. The gas guiding cover 61 is installed in the first reaction chamber 21, the second reaction chamber 22, and the third reaction chamber 23 through the fixing component 65. In the first reaction chamber 21, screw holes are formed on both sides of the gas guiding cover 61. The fixing component 65 includes two fixing bolts 651. The two fixing bolts 651 are respectively threadedly connected in the two screw holes. One end of each of the two fixing bolts 651 away from each other is fixedly connected with an abutting block 652. The two abutting blocks 652 respectively abut against the two side walls of the first reaction chamber 21; the top wall of the gas guiding cover 61 is arc-shaped and is provided with a plurality of through gas guiding holes 611.

[0038] When installing the gas guiding cover 61, manually rotate the fixing bolt 651, and the fixing bolt 651 drives the abutting block 652 to tightly abut against the inside of the tower body; since the acid mist entering the tower body directly rises to react with the sprayed pure water or alkali solution, there is an uneven distribution phenomenon during the rising process of the acid mist, which in turn affects the purification effect of the acid mist absorption tower; the setting of the gas guiding cover 61 enables the acid mist entering the first reaction chamber 21, the second reaction chamber 22, and the third reaction chamber 23 to rise evenly through the gas guiding holes 611, thereby realizing the even rising of the acid mist.

[0039] Reference Figure 6 and Figure 7 , a plurality of gas guiding pipes 62 are further fixedly connected to the side wall of the gas guiding cover 61 close to the spray head 54. The plurality of gas guiding pipes 62 are respectively communicated with the plurality of gas guiding holes 611. A waterproof cover 63 is fixedly connected to the end surface of the gas guiding pipe 62 away from the gas guiding cover 61. The waterproof cover 63 is conical. A drainage ring 64 is fixedly connected to the end of the waterproof cover 63 close to the gas guiding cover 61. A collection groove 641 is formed on the end surface of the drainage ring 64 away from the gas guiding cover 61. Drainage grooves 642 are formed on the side wall of the collection groove 641.

[0040] Since the top wall of the air guide cover 61 is an arc surface, when the purified water and lye sprayed down fall on the air guide cover 61, they will flow towards the end of the air guide cover 61, resulting in different water flow rates in the air guide holes 611 at the end and the middle part. Therefore, the exhaust gas volumes of the air guide holes 611 are different, that is, there is still an uneven distribution phenomenon during the upward movement of the acid mist; the setting of the air guide pipe 62 makes the purified water and lye sprayed not flow through the air guide holes 611 when falling on the air guide cover 61, so that the upward amount of acid mist in each air guide hole 611 is kept consistent, reducing the probability of uneven distribution during the upward movement of the acid mist; however, there will still be some purified water and lye sprayed into the air guide pipe 62, which affects the upward movement of the acid mist. The setting of the waterproof cover 63 shields the top end of the air guide pipe 62, reducing the probability of the purified water and lye sprayed directly entering the air guide pipe 62. At the same time, when the purified water and lye sprayed fall on the waterproof cover 63, they flow along the side wall of the waterproof cover 63 into the collection tank 641 and then are discharged through the drain tank 642, thereby reducing the probability of the purified water and lye sprayed entering the air guide pipe 62 and affecting the upward movement of the acid mist.

[0041] The implementation principle of a multi-level high-efficiency acid mist absorption tower in an embodiment of the present application is as follows: When absorbing and purifying acid mist, the acid mist enters the first reaction chamber 21 through the air inlet pipe 7. At this time, the pressure pump 51 connected to the first reaction chamber 21 is started, and the purified water in the filter tank 551 connected to the first reaction chamber 21 is sprayed out through the nozzle 54 to purify and absorb the acid mist; then the acid mist will enter the second reaction chamber 22 through the first air guide channel 24. At this time, the pressure pump 51 connected to the second reaction chamber 22 is started, and the purified water in the filter tank 551 connected to the second reaction chamber 21 is sprayed out through the nozzle 54; then the acid mist will enter the third reaction chamber 23 through the second air guide channel 25. At this time, the pressure pump 51 connected to the third reaction chamber 23 is started, and the lye in the filter tank 551 connected to the third reaction chamber 21 is sprayed out through the nozzle 54. Through three times of absorption, purified water is used to absorb and dissolve the acid mist in the first two times, greatly reducing the amount of acid mist entering the third reaction chamber 23, reducing the use of lye, lowering the production cost, and by separating different spaces in one acid mist absorption tower, reducing the usage of acid mist absorption towers, thereby reducing the floor area and being suitable for use in places with limited space.

[0042] An embodiment of the present application also discloses a multi-level high-efficiency acid mist absorption tower absorption method.

[0043] A multi-level high-efficiency acid mist absorption tower absorption method includes the following steps: Step 1: The acid mist generated during the zirconia production process enters the first reaction chamber 21 through the air inlet pipe 7. At this time, the nozzle 54 in the first reaction chamber 21 sprays purified water to absorb and dilute the acid mist; Step 2: The acid mist after absorption and dilution enters the second reaction chamber 22 through the first air guiding channel 24. At this time, the spray head 54 in the second reaction chamber 22 sprays pure water to further absorb and dilute the acid mist; Step 3: The acid mist after two rounds of absorption and dilution enters the third reaction chamber 23 through the second air guiding channel 25. At this time, the spray head 54 in the third reaction chamber 23 sprays alkali solution to carry out a neutralization reaction with the acid mist; Step 4: The exhausted gas after neutralization enters the top of the tower 3 and is discharged after the water is removed by the demisting layer 9.

[0044] The above are all the preferred embodiments of this application. The protection scope of this application is not limited hereby. Therefore, all equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.

Claims

1. A multi-level efficient acid mist absorption tower, comprising a base (1), wherein a tower body (2) and a tower top (3) are installed on the base (1), and it is characterized in that, The base (1) is divided into a first storage chamber (11), a second storage chamber (12) and a third storage chamber (13). Drain pipes (14) are installed in the first storage chamber (11), the second storage chamber (12) and the third storage chamber (13). The tower body (2) is divided into a first reaction chamber (21), a second reaction chamber (22) and a third reaction chamber (23). The third reaction chamber (23) communicates with the tower top (3). Pure water is stored in the first storage chamber (11) and the second storage chamber (12), and lye is stored in the third storage chamber (13). The first storage chamber (11), the second storage chamber (12) and the third storage chamber (13) communicate with the first reaction chamber (21), the second reaction chamber (22) and the third reaction chamber (23) respectively. An air inlet pipe (7) and a spraying mechanism (5) are installed on the tower body (2). The air inlet pipe (7) communicates with the first reaction chamber (21). Packing layers (8) are installed in the first reaction chamber (21), the second reaction chamber (22) and the third reaction chamber (23). A demisting layer (9) is installed in the tower top (3).

2. The multi-level high-efficiency acid mist absorption tower according to claim 1, wherein A first air guiding channel (24) is spaced between the first reaction chamber (21) and the second reaction chamber (22). The first air guiding channel (24) communicates with the first reaction chamber (21) and the second reaction chamber (22) respectively. A second air guiding channel (25) is spaced between the second reaction chamber (22) and the third reaction chamber (23). The second air guiding channel (25) communicates with the second reaction chamber (22) and the third reaction chamber (23) respectively. First communication grooves (26) and second communication grooves (27) are respectively formed in the bottom walls of the first air guiding channel (24) and the second air guiding channel (25). The first communication grooves (26) and the second communication grooves (27) communicate with the first storage chamber (11) and the second storage chamber (12) respectively. Check valves (28) are installed in both the first communication grooves (26) and the second communication grooves (27). Two observation windows are further installed on the tower body (2) for observing the height of the accumulated liquid at the bottoms of the first air guiding channel (24) and the second air guiding channel (25).

3. The multi-level high-efficiency acid mist absorption tower according to claim 2, wherein, A speed regulating mechanism (4) is further installed in the tower body (2). The speed regulating mechanism (4) includes a plurality of wind blocking plates (41), and the plurality of wind blocking plates (41) are all installed in the first air guiding channel (24) and the second air guiding channel (25) through adjusting components (42).

4. The multi-level high-efficiency acid mist absorption tower according to claim 3, wherein, The adjusting assembly (42) includes a plurality of fixing blocks (421). The plurality of fixing blocks (421) are respectively fixedly connected to the side walls of the first air guiding channel (24) and the second air guiding channel (25). A through rotation groove (424) is formed in the fixing block (421). A plurality of first limiting grooves (425) are formed in the side wall of the rotation groove (424). A rotating shaft (422) is rotatably connected in the rotation groove (424). The rotating shaft (422) is fixedly connected to the air blocking plate (41). A second limiting groove (426) is formed in the rotating shaft (422). A limiting block (423) is jointly inserted into the second limiting groove (426) and the first limiting groove (425).

5. The multi-level high-efficiency acid mist absorption tower according to claim 2, characterized in that The spraying mechanism (5) includes three pressure pumps (51). The three pressure pumps (51) are respectively communicated with the first storage cavity (11), the second storage cavity (12) and the third storage cavity (13) through a filtering assembly (55). Water supply pipes (52) are installed at the water outlet ends of the three pressure pumps (51). One end of the water supply pipe (52) far away from the pressure pump (51) is fixedly connected with a water distribution pipe (53). A plurality of spray heads (54) are fixedly connected to one ends of the three water distribution pipes (53) respectively located in the first reaction cavity (21), the second reaction cavity (22) and the third reaction cavity (23).

6. The multi-level high-efficiency acid mist absorption tower according to claim 5, wherein, The filtering assembly (55) includes a filtering box (551). One end of the filtering box (551) is open. A water inlet pipe (552) is fixedly connected to the filtering box (551). A plurality of sliding grooves (556) are formed in the end surface of the filtering box (551) where the opening is located. A filtering plate (554) is jointly inserted into two symmetrically arranged sliding grooves (556). A cover plate (553) is rotatably connected to the opening end of the filtering box (551). A water return pipe (555) is fixedly connected to the end of the filtering box (551) far away from the water inlet pipe (552). One end of the water return pipe (555) far away from the filtering box (551) is communicated with the water inlet end of the pressure pump (51).

7. The multi-level high-efficiency acid mist absorption tower according to claim 1, characterized in that, Air guiding mechanisms (6) are installed in the first reaction cavity (21), the second reaction cavity (22) and the third reaction cavity (23). The air guiding mechanism (6) includes an air guiding cover (61). A fixing assembly (65) is installed on the air guiding cover (61). The fixing assembly (65) includes two fixing bolts (651). The two ends of the two fixing bolts (651) are respectively threadedly connected to the two ends of the air guiding cover (61). Contact blocks (652) are fixedly connected to the end faces of the two fixing bolts (651) away from each other. The top wall of the air guiding cover (61) is arc-shaped and is provided with a plurality of through air guiding holes (611).

8. The multi-level high-efficiency acid mist absorption tower according to claim 7, characterized in that, The air guiding mechanism (6) further includes a plurality of air guiding pipes (62), and the plurality of air guiding pipes (62) are fixedly connected to the end surface of the air guiding cover (61) close to the tower top (3), and the plurality of air guiding pipes (62) are respectively communicated with the plurality of air guiding holes (611).

9. The multi-level high-efficiency acid mist absorption tower according to claim 8, characterized in that, The air guiding mechanism (6) further includes a plurality of waterproof covers (63), and the plurality of waterproof covers (63) are respectively fixedly connected to one ends of the plurality of air guiding pipes (62) away from the air guiding cover (61). The waterproof cover (63) is conical, and a drain ring (64) is fixedly connected to the end of the waterproof cover (63) close to the air guiding cover (61). A collection groove (641) is formed on the end surface of the drain ring (64) away from the air guiding cover (61), and a drain groove (642) is formed on the side wall of the collection groove (641).

10. A method for absorbing acid mist in a multi-level high-efficiency acid mist absorption tower, characterized in that, Using the multi-level high-efficiency acid mist absorption tower described in claim 5 to carry out the absorption and purification of acid mist, the following steps are included: Step 1: The acid mist in the zirconium oxide production process enters the first reaction chamber (21) through the air inlet pipe (7). At this time, the spray head (54) in the first reaction chamber (21) sprays pure water to absorb and dilute the acid mist; Step 2: The acid mist after absorption and dilution enters the second reaction chamber (22) through the first air guiding channel (24). At this time, the spray head (54) in the second reaction chamber (22) sprays pure water to further absorb and dilute the acid mist; Step 3: The acid mist after two rounds of absorption and dilution enters the third reaction chamber (23) through the second air guiding channel (25). At this time, the spray head (54) in the third reaction chamber (23) sprays alkali liquor to carry out a neutralization reaction with the acid mist; Step 4: The waste gas after neutralization enters the tower top (3) and is discharged after water removal by the demisting layer (9).

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