Demisting device for absorption tower

Abstract

The utility model belongs to the technical field of waste treatment, and discloses a demisting device for an absorption tower, the demisting device comprises a demisting assembly I and a demisting assembly II, the demisting assembly I is coaxially mounted in an air inducing pipeline, a backflow cavity I is positioned between the side wall of a reaction cavity and the inner side wall of the absorption tower, the top end of the backflow cavity I is open, and the air inducing pipeline is communicated with the backflow cavity I; a second backflow cavity is formed between the outer side wall of the air inducing pipeline and the outer cavity wall of the top end of the reaction cavity, the second backflow cavity is communicated with the air inducing pipeline, a hydrophilic semi-permeable membrane is arranged at the communication position, and the side end of the second backflow cavity is communicated with the first backflow cavity; the bottom of the exhaust cavity communicates with an air inlet pipeline, and the lower end of the air inlet pipeline communicates with the air inducing pipeline and the first backflow cavity. The second demisting assembly is installed in the air inlet pipeline, and an exhaust port communicating with the outside is formed in the top of the exhaust cavity. According to the demisting device, the flowing path of liquid is changed, the situation that the liquid and gas are repeatedly mixed to generate mist again can be reduced, secondary demisting is conducted through the second demisting assembly, and the demisting effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of waste gas treatment technology, and more specifically to a demisting device for an absorption tower. Background Technology

[0002] The main function of an absorption tower is to absorb sulfur dioxide from flue gas. Typical absorption towers use a limestone-gypsum application method for flue gas desulfurization to remove dust and harmful gases such as sulfur dioxide. Even after spray absorption and purification, the flue gas still retains a significant amount of droplets and dust. These droplets include water mist, sulfuric acid droplets formed from the reaction of unremoved sulfur dioxide with water, and calcium sulfate and calcium sulfite droplets produced during the desulfurization reaction. Before the flue gas is discharged from the absorption tower, a demister must be used to remove these droplets to prevent the strong acidic droplets and calcium sulfite droplets from corroding the flue and other downstream equipment. Direct emission would cause severe air pollution.

[0003] However, existing demisters have poor demisting effect, leaving a large amount of mist in the exhaust gas unremoved. Furthermore, the water droplets from the demister remix with the gas as they drip, increasing the water content of the mist and further worsening the demisting effect. This makes it easy for mist carrying corrosive substances to be emitted, causing corrosion to subsequent treatment equipment and serious environmental pollution.

[0004] Therefore, how to provide a defogging device that can reduce the remixing of water droplets and mist, prevent its moisture content from increasing, and improve the defogging effect is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the present invention provides a demisting device for an absorption tower, which performs a secondary demisting process on the fog by using a vertically installed demisting component one and a horizontally installed demisting component two, so as to solve the problems of fog regeneration and poor demisting effect in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A demister for an absorption tower is installed on the absorption tower, which includes a reaction chamber, a reflux chamber, and an exhaust chamber.

[0008] An air intake mechanism is installed on the side wall of the absorption tower corresponding to the reaction chamber;

[0009] A spraying mechanism is installed on the side wall of the absorption tower and above the air inlet mechanism, corresponding to the reaction chamber.

[0010] The air-exhaust mechanism includes an air-exhaust duct and a fan. The air-exhaust duct is arranged along the vertical direction of the absorption tower, corresponding to the reaction chamber above the spray mechanism. The top of the reaction chamber has an air outlet that communicates with the air-exhaust duct. The first end of the air-exhaust duct is fixed to the inner wall of the absorption tower. The fan is fixed to the outside of the absorption tower, and its air outlet penetrates the side wall of the absorption tower and communicates with the first end of the air-exhaust duct.

[0011] A first demisting component is coaxially mounted inside the second end of the exhaust duct. A first reflux chamber is located between the side wall of the reaction chamber and the inner side wall of the absorption tower, with an open top. The second end of the exhaust duct communicates with the open top of the first reflux chamber. The reaction chamber has a through hole at the bottom of the side wall corresponding to the first reflux chamber, communicating with it. A second reflux chamber is located between the outer side wall of the second end of the exhaust duct and the outer wall of the top of the reaction chamber. The top of the second reflux chamber communicates with the second end of the exhaust duct, and a hydrophilic semi-permeable membrane is arranged at the communication point. The side end of the second reflux chamber communicates with the first reflux chamber.

[0012] The second demisting component has an exhaust chamber located above the first return chamber and an air inlet at its bottom. An air inlet pipe is coaxially installed corresponding to the air inlet, and the lower end of the air inlet pipe is connected to the second end of the air duct and the top opening of the first return chamber. The second demisting component is coaxially installed inside the air inlet pipe, and an exhaust port communicating with the outside is opened at the top of the exhaust chamber.

[0013] As can be seen from the above technical solution, compared with the prior art, this utility model discloses a demisting device for an absorption tower. The waste gas to be treated is discharged into the reaction chamber through the air inlet mechanism, while the spray mechanism is activated, causing it to rotate and spray liquid to react with the gas. After the reaction, mist is generated and moves towards the air outlet at the top of the reaction chamber. It then enters the exhaust duct, where a fan blows the mist along the duct towards the demisting component. The mist collides with the component within the demisting component, and due to inertia, preliminary water-gas separation occurs. The separated water droplets flow to both sides of the demisting component, with the one flowing directly out to the right. The second end of the exhaust duct directly enters the first return chamber. Water flowing to the left passes through a hydrophilic semi-permeable membrane that only allows liquids to pass through, allowing water to enter the second return chamber. It then flows along the bottom wall of the second return chamber back into the first return chamber, and finally returns to the reaction chamber for collection. The separated gas leaves the first demister assembly and enters the first return chamber, continuing upwards into the exhaust chamber. The gas that has completed gas-liquid separation, along with a small portion of incompletely demisted mist, passes through the second demister assembly at the intake duct. Due to inertia, the mist collides with the second demister assembly, completing a secondary demisting process and further improving the demisting effect on the flue gas. By coordinating the fan and the first demister assembly, the demisting process is achieved, ensuring that most of the liquid in the mist is absorbed and returned by the first demister assembly, preventing the liquid from remixing with the flue gas and becoming mist again. The secondary demisting by the second demister assembly further enhances the demisting effect, ensuring that the flue gas is completely demisted before discharge.

[0014] Furthermore, the demisting assembly includes a mounting sleeve, a demisting plate, and a connecting rod. The mounting sleeve is coaxially mounted on the inner side wall of the second end of the air duct. There are multiple demisting plates, which are fixed inside the mounting sleeve along the axial direction and arranged at intervals. There are multiple connecting rods, which connect and fix the multiple demisting plates to each other.

[0015] Furthermore, the second demisting component includes a second mounting sleeve, a second demisting plate, and a second connecting rod. The second mounting sleeve is correspondingly sleeved and installed on the inner side wall of the air intake pipe. There are multiple second demisting plates, which are fixed inside the second mounting sleeve along the axial direction and arranged at intervals. There are multiple second connecting rods, which connect and fix the multiple second demisting plates to each other.

[0016] Furthermore, the axial cross-sections of both the first and second demisting plates are wavy.

[0017] The beneficial effects of adopting the above technical solution are: the wave-shaped undulating structure provides multiple interception paths for the airflow. When the mist droplets move in the airflow, they will collide and condense multiple times at the high and low points of the wave, thereby improving the defogging efficiency.

[0018] Furthermore, the air intake mechanism includes an air intake pump and an air intake pipe. The air intake pump is installed on the outer wall of the reaction chamber, and its outlet end is connected to one end of the air intake pipe through an air guide pipe. The other end of the air intake pipe is fixedly installed on the inner wall of the reaction chamber through a fixing connecting rod. Multiple air outlet holes are evenly distributed on the circumferential wall of the air intake pipe.

[0019] The beneficial effects of adopting the above technical solution are: multiple air outlet holes are evenly distributed on the circumferential wall of the air inlet pipe, so that the gas can enter the reaction chamber evenly from multiple directions; this design can effectively avoid the local concentration of gas in the reaction chamber being too high or too low, improve the uniformity of gas distribution, and thus improve the reaction efficiency.

[0020] Furthermore, the spraying mechanism includes a support plate, a bearing, a spray pipe mounting base, and a spray pipe. The support plate is horizontally fixedly installed inside the reaction chamber and located above the air inlet mechanism. The bearing passes through the upper and lower surfaces of the support plate and is installed inside it. One end of the spray pipe mounting base passes through the bearing and is connected to it for transmission, while the other end is located below the support plate. The spray pipe mounting base is hollow inside, and the spray pipe is adapted to be installed inside the spray pipe mounting base. The upper end of the spray pipe can be connected to the water supply component, and the lower end is arranged horizontally and extends outward along its axial direction towards the outside of the spray pipe mounting base.

[0021] The beneficial effects of adopting the above technical solution are: the horizontal arrangement of the spray pipes and their axial extension to the outside of the spray pipe mounting base enable uniform spraying over a large area. This design allows the spray liquid to uniformly cover the entire cross-section of the reaction chamber, ensuring sufficient contact between the gas and the spray liquid within the reaction chamber and improving absorption efficiency.

[0022] Furthermore, multiple spray heads are evenly distributed and installed on the outer peripheral wall of the horizontal extension section of the spray pipe.

[0023] Furthermore, the water supply assembly includes a water supply tank, a water pump, and an inlet pipe. The water supply tank is located outside the absorption tower. The inlet end of the water pump is connected to the water supply tank through a pipe body, the outlet end is connected to one end of the inlet pipe, and the other end of the inlet pipe is connected to the upper end of the spray pipe.

[0024] The beneficial effects of adopting the above technical solution are: the water supply tank is placed outside the absorption tower and connected to the spray pipe through a water pump and inlet pipe, forming an independent and stable water supply system. This design can ensure that the spray pipe receives a stable water supply during operation, avoiding spray interruption or uneven spraying due to insufficient or unstable water supply.

[0025] Furthermore, the spraying mechanism also includes a drive assembly, which includes a drive motor, a rotating shaft, a first bevel gear, and a second bevel gear. The drive motor is fixedly installed on the outer wall of the reaction chamber. One end of the rotating shaft is connected to the output end of the drive motor, and the other end is located inside the reaction chamber. The first bevel gear is driven and installed on the other end of the rotating shaft. The second bevel gear is fixedly installed on the top of the spray pipe mounting base. The first bevel gear and the second bevel gear mesh and drive each other. The second bevel gear has a central hole to allow the water inlet pipe to pass through.

[0026] The beneficial effects of adopting the above technical solution are as follows: the drive motor drives the rotating shaft to rotate, and the meshing transmission of bevel gear one and bevel gear two enables the spray pipe mounting base to rotate horizontally. This design allows the spray pipe to achieve omnidirectional rotating spraying, further optimizing the distribution of the spray liquid, ensuring full contact between the gas and the spray liquid in the reaction chamber, and improving absorption efficiency.

[0027] Furthermore, the spraying mechanism also includes a protective housing, which is fixedly installed on the top of the support plate, and the first bevel gear, the second bevel gear, and the top of the spray pipe mounting base are all located inside the protective housing.

[0028] The beneficial effects of adopting the above technical solution are: setting up a protective shell can effectively prevent dust, impurities and moisture from entering the transmission parts of the bevel gear and spray pipe mounting base, reduce mechanical failures and corrosion problems caused by external environmental factors, and extend the service life of the equipment. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0030] Figure 1 This is a three-dimensional structural diagram of the absorption tower provided by this utility model.

[0031] Figure 2 for Figure 1 Internal axonal schematic diagram.

[0032] Figure 3 for Figure 1 A sectional view.

[0033] Figure 4 for Figure 3 A magnified structural diagram of part A in the middle.

[0034] Among them, 100-absorption tower, 1001-reaction chamber, 1002-reflux chamber one, 1003-exhaust chamber, 1004-reflux chamber two, 1-air inlet mechanism, 11-air inlet pump, 12-air inlet pipe, 121-air outlet, 2-spraying mechanism, 21-support plate, 22-bearing, 23-spray pipe mounting base, 24-spray pipe, 241-spray head, 25-water supply assembly, 251-water supply tank, 252-water pump, 253- 26-Water inlet pipe, 26-Drive assembly, 261-Drive motor, 262-Rotating shaft, 263-Bevel gear one, 264-Bevel gear two, 27-Protective housing, 3-Air intake mechanism, 31-Air intake duct, 32-Fan, 33-Hydrophilic semi-permeable membrane, 4-Defogger assembly one, 41-Mounting sleeve one, 42-Defogger plate one, 43-Connecting rod one, 5-Defogger assembly two, 51-Mounting sleeve two, 52-Defogger plate two, 53-Connecting rod two. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0036] This utility model discloses a demisting device for an absorption tower, which is installed on an absorption tower 100. The absorption tower 100 includes a reaction chamber 1001, a reflux chamber 1002, and an exhaust chamber 1003. It includes an air inlet mechanism 1, which is installed on the side wall of the absorption tower 100 corresponding to the reaction chamber 1001. A spray mechanism 2 is provided above the air inlet mechanism 1, and the spray mechanism 2 is installed on the side wall of the absorption tower 1001 corresponding to the reaction chamber 1001. An air duct mechanism 3 is arranged at the top of the reaction chamber 1001. The air duct mechanism 3 includes an air duct 31 and a fan 32. The air duct 31 is arranged along the vertical direction of the absorption tower 100, corresponding to the reaction chamber 1001 above the spray mechanism 2. An air outlet is opened at the top of the reaction chamber 1001 and communicates with the air duct 31. The first end of the air duct 31 is fixed to the inner side wall of the absorption tower 100. The fan 32 is fixed to the outside of the absorption tower 100, and its air outlet penetrates the side wall of the absorption tower 100 and communicates with the first end of the air duct 31.

[0037] It also includes a demisting component 4, which is coaxially installed inside the second end of the exhaust duct 31. The return chamber 1002 is located between the side wall of the reaction chamber 1001 and the inner side wall of the absorption tower 100 and has an open top. The second end of the exhaust duct 31 is connected to the top opening of the return chamber 1002. The bottom end of the side wall of the reaction chamber 1001 corresponding to the return chamber 1002 has a through hole that communicates with it. The outer side wall of the second end of the exhaust duct 31 and the outer wall of the top of the reaction chamber 1001 are the return chamber 2 1004. The top of the return chamber 2 1004 is connected to the second end of the exhaust duct 31 and a hydrophilic semi-permeable membrane 33 is arranged at the connection. The side end of the return chamber 2 1004 is connected to the return chamber 1 1002.

[0038] It also includes a second demisting component 5. The exhaust chamber 1003 is located above the first return chamber 1002 and has an air inlet at the bottom. An air inlet pipe is coaxially installed corresponding to the air inlet, and the lower end of the air inlet pipe is connected to the second end of the induced draft pipe 31 and the top opening of the first return chamber 1002. The second demisting component 5 is coaxially installed in the air inlet pipe, and the top of the exhaust chamber 1003 has an exhaust port that communicates with the outside.

[0039] In a specific embodiment of the present invention, the demisting component 4 includes a mounting sleeve 41, a demisting plate 42, and a connecting rod 43. The mounting sleeve 41 is coaxially mounted on the inner side wall of the second end of the air duct 31. There are multiple demisting plates 42, which are fixed inside the mounting sleeve 41 along the axial direction and arranged at intervals. There are multiple connecting rods 43, which connect and fix the multiple demisting plates 42 together.

[0040] In a specific embodiment of the present invention, the second demisting component 5 includes a second mounting sleeve 51, a second demisting plate 52, and a second connecting rod 53. The second mounting sleeve 51 is correspondingly sleeved and installed on the inner side wall of the air intake pipe. There are multiple second demisting plates 52, which are fixed inside the second mounting sleeve 51 along the axial direction and arranged at intervals. There are multiple second connecting rods 53, and the multiple second demisting plates 52 are connected and fixed to each other through multiple second connecting rods 53.

[0041] In the above embodiments, the axial cross-sections of both the first demisting plate 42 and the second demisting plate 52 are wavy. The wavy undulating structure provides multiple interception paths for the airflow. When the mist droplets move in the airflow, they will collide and condense multiple times at the high and low points of the wave, thereby improving the demisting efficiency.

[0042] In a specific embodiment of the air intake mechanism 1 of this utility model, the air intake mechanism 1 includes an air intake pump 11 and an air intake pipe 12. The air intake pump 11 is installed on the outer wall of the reaction chamber 1001, and its outlet end is connected to one end of the air intake pipe 12 through a guide pipe. The other end of the air intake pipe 12 is fixedly installed on the inner wall of the reaction chamber 1001 through a fixing connecting rod. Multiple air outlet holes 121 are evenly distributed on the circumferential wall of the air intake pipe 12. The multiple air outlet holes evenly distributed on the circumferential wall of the air intake pipe 12 allow gas to enter the reaction chamber 1001 evenly from multiple directions. This design can effectively avoid excessively high or low local concentrations of gas in the reaction chamber, improve the uniformity of gas distribution, and thus improve reaction efficiency.

[0043] In a specific embodiment of the spraying mechanism 2 of this utility model, the spraying mechanism 2 includes a support plate 21, a bearing 22, a spray pipe mounting base 23, and a spray pipe 24. The support plate 21 is horizontally installed inside the reaction chamber 1001 and above the air inlet mechanism 1. The bearing 22 passes through the upper and lower surfaces of the support plate 21 and is installed inside it. The upper end of the spray pipe mounting base 23 passes through the bearing 22 and is connected to it for transmission, while the lower end is located below the support plate 21. The spray pipe mounting base 23 is hollow inside, and the spray pipe 24 is adapted to be installed inside the spray pipe mounting base 23. The upper end of the spray pipe 24 can communicate with the water supply component 25, and the lower end is horizontally arranged and extends outward along its axial direction towards the outside of the spray pipe mounting base 23. The horizontal arrangement of the spray pipe 24 and its axial extension outward towards the outside of the spray pipe mounting base 23 enable uniform spraying over a large area. This design allows the spray liquid to uniformly cover the entire cross-section of the reaction chamber 1001, ensuring sufficient contact between the gas in the reaction chamber and the spray liquid, thereby improving absorption efficiency.

[0044] In the above embodiment, a plurality of spray heads 241 are evenly distributed on the outer peripheral wall of the horizontal extension section of the spray pipe 24.

[0045] In a specific embodiment of this utility model, the water supply component 25 includes a water supply tank 251, a water pump 252, and an inlet pipe 253. The water supply tank 251 is located outside the absorption tower 100. The inlet end of the water pump 252 is connected to the water supply tank 251 through a pipe, and the outlet end is connected to one end of the inlet pipe 253. The other end of the inlet pipe 253 is connected to the upper end of the spray pipe 24. The water supply tank 251, located outside the absorption tower 100, is connected to the spray pipe 24 through the water pump 252 and the inlet pipe 253, forming an independent and stable water supply system. This design ensures that the spray pipe 24 receives a stable water supply during operation, avoiding spray interruptions or uneven spraying due to insufficient or unstable water supply.

[0046] In the above embodiment, the spraying mechanism 2 further includes a drive assembly 26, which includes a drive motor 261, a rotating shaft 262, a first bevel gear 263, and a second bevel gear 264. The drive motor 261 is fixedly mounted on the outer wall of the reaction chamber 1001. One end of the rotating shaft 262 is connected to the output end of the drive motor 261, and the other end is located inside the reaction chamber 1001. The first bevel gear 263 is drivenly mounted on the other end of the rotating shaft 262, and the second bevel gear 264 is fixedly mounted on the top of the spray pipe mounting base 23. The first bevel gear 263 and the second bevel gear 264 mesh and drive each other. The second bevel gear 264 has a central hole to allow the water inlet pipe 253 to pass through. The drive motor 261 drives the rotating shaft 262 to rotate, and the meshing of the first bevel gear 263 and the second bevel gear 264 enables the spray pipe mounting base 23 to rotate horizontally. This design enables the spray pipe 24 to achieve omnidirectional rotating spraying, further optimizing the distribution of the spray liquid, ensuring that the gas in the reaction chamber 1001 is in full contact with the spray liquid, and improving the absorption efficiency.

[0047] In the above embodiment, the spraying mechanism 2 further includes a protective housing 27, which is fixedly installed on the top of the support plate 21. The tops of the first bevel gear 263, the second bevel gear 264, and the spray pipe mounting base 23 are all located inside the protective housing 27. The protective housing effectively prevents dust, impurities, and moisture from entering the transmission parts of the bevel gears and the spray pipe mounting base, reducing mechanical failures and corrosion problems caused by external environmental factors and extending the service life of the equipment.

[0048] The working principle of the demister for an absorption tower according to this utility model is as follows:

[0049] The waste gas to be treated is discharged into the reaction chamber through the air intake mechanism. Simultaneously, the water pump and drive motor of the spray mechanism are activated, allowing the sprayer to rotate and react with the gas while water is being introduced. After the reaction, mist is generated and moves towards the air outlet at the top of the reaction chamber. It then enters the exhaust duct, where a fan blows the mist along the duct towards the first demisting component. Inside the first demisting component, the mist collides with the spaced corrugated plates. Due to inertia, the mist undergoes initial water-gas separation. The separated water droplets flow along the surface of the demisting plates to both sides of the first demisting component, specifically flowing to the right and directly out of the second end of the exhaust duct. The gas enters the first return chamber and flows to the left through a hydrophilic semi-permeable membrane that only allows liquids to pass through, allowing water to enter the second return chamber. Water then flows along the bottom wall of the second return chamber back into the first return chamber, and then flows back to the reaction chamber for collection. The separated gas leaves the first demister assembly and enters the first return chamber, continuing upwards into the exhaust chamber. The gas that has completed gas-liquid separation, along with a small amount of incompletely demisted mist, passes through the second demister assembly at the intake pipe. Again, due to inertia, the mist collides with the spaced-apart demisting plates within the second demister assembly, completing a secondary demisting process and further improving the demisting effect on the flue gas.

[0050] Therefore, by combining the fan and the first defogging component, this utility model can perform the defogging process, so that most of the liquid in the fog is absorbed by the first defogging component and flows back, preventing the liquid from remixing with the flue gas to become fog again. The second defogging component performs secondary defogging, which improves the defogging effect and ensures that the flue gas is completely defogged before being discharged.

[0051] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0052] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A mist eliminator for an absorption tower, installed on an absorption tower (100) comprising a reaction cavity (1001), a reflux cavity I (1002) and an exhaust cavity (1003) in the absorption tower (100), characterized in that, include: An air intake mechanism (1) is installed on the side wall of the absorption tower (100) corresponding to the reaction chamber (1001); A spraying mechanism (2) is installed on the side wall of the absorption tower (100) corresponding to the reaction chamber (1001) and located above the air inlet mechanism (1); The air-exhaust mechanism (3) includes an air-exhaust pipe (31) and a fan (32). The air-exhaust pipe (31) is arranged in the reaction chamber (1001) above the spray mechanism (2) along the vertical direction of the absorption tower (100). The top of the reaction chamber (1001) is provided with an air outlet and communicates with the air-exhaust pipe (31). The first end of the air-exhaust pipe (31) is fixed to the inner side wall of the absorption tower (100). The fan (32) is fixed to the outside of the absorption tower (100) and its air outlet penetrates the side wall of the absorption tower (100) and communicates with the first end of the air-exhaust pipe (31). Demisting component one (4) is coaxially installed on the inner side of the second end of the air duct (31). The return chamber one (1002) is located between the side wall of the reaction chamber (1001) and the inner side wall of the absorption tower (100) and has an open top. The second end of the air duct (31) is connected to the open top of the return chamber one (1002). The reaction chamber (1001) has a through hole at the bottom of the side wall corresponding to the return chamber one (1002) that is connected to it. The outer side wall of the second end of the air duct (31) and the outer wall of the top of the reaction chamber (1001) are connected to the return chamber two (1004). The top of the return chamber two (1004) is connected to the second end of the air duct (31) and a hydrophilic semi-permeable membrane (33) is arranged at the connection. The side end of the return chamber two (1004) is connected to the return chamber one (1002). The second demisting component (5) has an exhaust chamber (1003) located above the first return chamber (1002) and has an air inlet at the bottom. An air inlet pipe is coaxially installed corresponding to the air inlet, and the lower end of the air inlet pipe is connected to the second end of the air duct (31) and the top opening of the first return chamber (1002). The second demisting component (5) is coaxially installed in the air inlet pipe, and the top of the exhaust chamber (1003) has an exhaust port that communicates with the outside.

2. A mist eliminator for an absorption column according to claim 1, wherein The demisting assembly (4) includes a mounting sleeve (41), a demisting plate (42), and a connecting rod (43). The mounting sleeve (41) is coaxially mounted on the inner side wall of the second end of the air duct (31). There are multiple demisting plates (42), which are fixed inside the mounting sleeve (41) along the axial direction and arranged at intervals. There are multiple connecting rods (43), which connect and fix the multiple demisting plates (42) to each other through the multiple connecting rods (43).

3. A mist eliminator for an absorption column according to claim 2, wherein The second demisting component (5) includes a second mounting sleeve (51), a second demisting plate (52), and a second connecting rod (53). The second mounting sleeve (51) is fitted onto the inner wall of the air intake pipe. There are multiple second demisting plates (52), which are fixed inside the second mounting sleeve (51) along the axial direction and are spaced apart. There are multiple second connecting rods (53), which connect and fix the multiple second demisting plates (52) to each other through the multiple second connecting rods (53).

4. A mist eliminator for an absorption column according to claim 3, wherein The axial cross-sections of both the first (42) and the second (52) demister are wavy.

5. The mist eliminator for an absorption column according to claim 1, wherein The air intake mechanism (1) includes an air intake pump (11) and an air intake pipe (12). The air intake pump (11) is installed on the outer wall of the reaction chamber (1001). Its outlet end is connected to one end of the air intake pipe (12) through an air guide pipe. The other end of the air intake pipe (12) is fixedly installed on the inner wall of the reaction chamber (1001) through a fixed connecting rod. Multiple air outlet holes (121) are evenly distributed on the circumferential wall of the air intake pipe (12).

6. The mist eliminator for an absorption column according to claim 1, wherein The spraying mechanism (2) includes a support plate (21), a bearing (22), a spray pipe mounting base (23), and a spray pipe (24). The support plate (21) is horizontally installed in the reaction chamber (1001) and above the air intake mechanism (1). The bearing (22) passes through the upper and lower surfaces of the support plate (21) and is installed inside it. The upper end of the spray pipe mounting base (23) passes through the bearing (22) and is connected to it in a transmission manner. The lower end is located below the support plate (21). The spray pipe mounting base (23) is hollow inside and the spray pipe (24) is adapted to be installed inside the spray pipe mounting base (23). The upper end of the spray pipe (24) can be connected to the water supply component (25), and the lower end is arranged horizontally and extends outward along its axial direction to the outside of the spray pipe mounting base (23).

7. A mist eliminator for an absorption column according to claim 6, wherein Multiple spray heads (241) are evenly distributed on the outer peripheral wall of the horizontal extension section of the spray pipe (24).

8. A mist eliminator for an absorption column according to claim 6, wherein The water supply assembly (25) includes a water supply tank (251), a water pump (252), and an inlet pipe (253). The water supply tank (251) is located outside the absorption tower (100). The inlet end of the water pump (252) is connected to the water supply tank (251) through a pipe body, and the outlet end is connected to one end of the inlet pipe (253). The other end of the inlet pipe (253) is connected to the upper end of the spray pipe (24).

9. A mist eliminator for an absorption column according to claim 8, wherein The spraying mechanism (2) further includes a drive assembly (26), which includes a drive motor (261), a rotating shaft (262), a first bevel gear (263), and a second bevel gear (264). The drive motor (261) is fixedly installed on the outer wall of the reaction chamber (1001). One end of the rotating shaft (262) is connected to the output end of the drive motor (261), and the other end is located inside the reaction chamber (1001). The first bevel gear (263) is drivenly installed on the other end of the rotating shaft (262). The second bevel gear (264) is fixedly installed on the top of the spray pipe mounting base (23). The first bevel gear (263) and the second bevel gear (264) mesh and drive each other. The second bevel gear (264) has a central hole to allow the water inlet pipe (253) to pass through.

10. A mist eliminator for an absorption column according to claim 9, wherein The spraying mechanism (2) also includes a protective housing (27), which is fixedly installed on the top of the support plate (21), and the top of the first bevel gear (263), the second bevel gear (264), and the spray pipe mounting base (23) are all located inside the protective housing (27).

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