Wet desulfurization device and control method
By designing a flue gas distribution assembly and a clarifier in the wet desulfurization unit, the flue gas forms bubbles in the slurry and comes into contact with the clarified liquid. Combined with aeration oxidation and cleaning components, the problem of reduced contact area caused by droplet aggregation is solved, the desulfurization efficiency is improved and clogging is reduced, and a more efficient desulfurization effect is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- BEIJING LONGYUAN WEIDE ENERGY TECH CO LTD
- Filing Date
- 2026-02-28
- Publication Date
- 2026-06-05
AI Technical Summary
In existing wet desulfurization devices, as the number and layers of spray components increase, droplets collide and coalesce into larger droplets, reducing the contact area between the droplets and the flue gas, resulting in limited improvement in desulfurization efficiency.
The design employs a smoke distribution assembly and a clarifier to create bubbles in the slurry from the flue gas. These bubbles are then evenly distributed through the air distribution ring pipe and the smoke distribution nozzle. Combined with the clarifier spray and aeration oxidation assembly, this increases the contact area between the flue gas and the slurry and enhances the reaction mass transfer effect. Furthermore, rotating the assembly helps to clean the components and reduce clogging.
This improved the contact area and mass transfer effect between flue gas and slurry, enhanced desulfurization efficiency, reduced clogging of flue gas nozzles, and ensured the stable operation of the desulfurization unit.
Smart Images
Figure CN122141450A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of wet desulfurization, and in particular to a wet desulfurization device and control method. Background Technology
[0002] Wet desulfurization is the most mainstream method in flue gas desulfurization technology. The core principle of wet desulfurization is to use an aqueous solution or slurry of alkaline absorbent to wash the flue gas in a wet state. Through mass transfer and chemical reaction between the gas and liquid phases, sulfur dioxide in the flue gas is removed and converted into stable sulfate by-products (such as gypsum).
[0003] The wet desulfurization device in the relevant technology includes a desulfurization tower, a spray assembly, a flue gas inlet pipe, and a demister. The bottom of the desulfurization tower contains slurry. The flue gas inlet pipe passes the flue gas into the desulfurization tower. The spray assembly extracts the slurry and sprays it onto the flue gas to achieve self-circulation of the slurry. After being sprayed and washed, the flue gas passes through the demister, which removes mist from the flue gas before it is discharged.
[0004] To improve desulfurization efficiency, the number and layers of spray components are generally increased. However, when the number and layers of spray components are increased to a certain limit, the upper and lower droplets sprayed by the spray components collide and aggregate into larger droplets, which reduces the total surface area and the contact area between the droplets and the flue gas, thus limiting the improvement in desulfurization efficiency. Summary of the Invention
[0005] To further improve desulfurization efficiency, this application provides a wet desulfurization device and control method.
[0006] This application provides a wet desulfurization device and control method, which adopts the following technical solution: In a first aspect, this application provides a wet desulfurization device, including a desulfurization tower, a spray assembly, a smoke distribution assembly, a clarifier, and a demister; the bottom of the desulfurization tower is provided with a slurry chamber, which contains slurry. The smoke distribution assembly is disposed in the slurry chamber and is immersed in the slurry. The smoke distribution assembly includes a smoke inlet pipe, an air distribution pipe, and smoke distribution nozzles. Smoke gas is introduced into the smoke inlet pipe and the smoke inlet pipe is connected to the air distribution pipe. Multiple smoke distribution nozzles are disposed along the air distribution pipe and are connected to the air distribution pipe. The clarification tank is connected to the bottom of the slurry chamber. The spraying assembly draws the clarified liquid from the clarification tank and sprays the clarified liquid onto the flue gas. The demister is connected to the top of the desulfurization tower. The flue gas passes through the demister and is discharged from the desulfurization tower.
[0007] By adopting the above technical solution, flue gas enters through the inlet pipe and exits through the gas distribution pipe and the gas nozzle, causing the flue gas to form bubbles in the slurry. This allows the flue gas to first contact the slurry and then the clarifying liquid sprayed by the spraying components, making the reaction and mass transfer of the flue gas more complete and further improving the desulfurization efficiency. The clarification tank is connected to the bottom of the slurry chamber. The sediment and slurry at the bottom of the slurry chamber are transported to the clarification tank, where the clarification tank clarifies the slurry and sediment. The spraying components draw the clarified liquid from the clarification tank and spray it onto the flue gas, enabling the recycling of the slurry. The demister demistes the flue gas before discharge, ensuring the quality of the discharged flue gas.
[0008] Optionally, the air distribution pipe includes an air distribution ring pipe and an air distribution connecting pipe. Multiple air distribution ring pipes are provided, and the air distribution connecting pipe connects the multiple air distribution ring pipes. The air distribution nozzles are connected to the air distribution ring pipes, and the multiple air distribution nozzles are respectively located on the inner and outer sides of the air distribution ring pipes.
[0009] By adopting the above technical solution, multiple gas distribution ring pipes are connected through a gas distribution connecting pipe, and the flue gas nozzles are located on the inner and outer sides of the gas distribution ring pipes, which can make the flue gas form bubbles more evenly in the slurry, increase the contact area between the flue gas and the slurry, and make the reaction and mass transfer between the flue gas and the slurry more complete, thereby improving the desulfurization efficiency.
[0010] Optionally, for the projections of the plurality of air distribution ring pipes on the horizontal plane, the projections of the plurality of air distribution ring pipes overlap each other and are spaced apart.
[0011] By adopting the above technical solutions, the distribution of the gas distribution ring pipe is made more reasonable, which allows the flue gas to form bubbles more evenly in the slurry, thereby making the contact between the flue gas and the slurry more sufficient, further improving the reaction and mass transfer effect of the flue gas, and improving the desulfurization efficiency.
[0012] Optionally, it also includes a rotating component and a cleaning component, wherein the rotating component drives the cleaning component to rotate, so that the cleaning component brushes the smoke distribution component.
[0013] By adopting the above technical solution, the rotating component drives the cleaning component to rotate, enabling the cleaning brush to sweep the smoke distribution component, reducing the accumulation of deposits on the smoke distribution component and effectively reducing the clogging of the smoke distribution nozzles. At the same time, the rotation of the cleaning component also agitates the slurry, allowing air bubbles to come into more thorough contact with the slurry, thereby improving desulfurization efficiency.
[0014] Optionally, the cleaning assembly includes a support rod and a cleaning brush, the cleaning brush being connected to the support rod and used to contact the cloth nozzle.
[0015] By adopting the above technical solution, the support rod provides support for the cleaning brush, the rotating component drives the support rod to rotate, and the support rod drives the cleaning brush to move, so that the cleaning brush can brush the cloth flue, reduce the deposition of deposits on the cloth flue, reduce the clogging of the cloth flue, and the rotation of the cleaning brush can agitate the slurry, so that the air bubbles can come into more full contact with the slurry.
[0016] Optionally, the desulfurization tower is equipped with an aeration oxidation component, which is connected to the cleaning component. The rotating component drives the aeration oxidation component to rotate, and the aeration oxidation component aerates the slurry.
[0017] By adopting the above technical solution, the rotating component drives the aeration oxidation component to rotate. The aeration oxidation component can distribute the aerated air more evenly in the slurry during the rotation process, which helps to form gypsum in the slurry.
[0018] Optionally, the aeration oxidation component includes an air supply pipe, an aeration branch pipe, and an aeration nozzle. Air is supplied through the air supply pipe, the aeration branch pipe is connected to the air supply pipe, and the aeration nozzle is connected to the aeration branch pipe.
[0019] By adopting the above technical solution, air is introduced through the air supply pipe, and the air is discharged from the aeration nozzle through the aeration branch pipe to aerate the slurry, which is conducive to the formation of gypsum in the slurry.
[0020] Optionally, the aeration oxidation component further includes a bottom scraper connected to the aeration branch pipe; the inner bottom end of the slurry chamber is tapered from top to bottom, and the bottom scraper abuts against the inner bottom wall of the slurry chamber; when the rotating component drives the aeration oxidation component to rotate, the bottom scraper scrapes off the deposits on the inner bottom wall of the slurry chamber.
[0021] By adopting the above technical solution, the bottom of the slurry chamber is tapered. When the rotating component drives the aeration oxidation component to rotate, the bottom scraper can scrape off the deposits on the bottom wall of the slurry chamber, reducing the accumulation of deposits on the bottom wall of the slurry chamber, ensuring the normal use of the slurry chamber and the stable operation of the desulfurization unit.
[0022] Optionally, the projections of the aeration nozzle and the smoke nozzle on the horizontal plane are offset.
[0023] By adopting the above technical solution, the mutual interference between the aeration bubbles and the flue gas bubbles is reduced, ensuring that the flue gas bubbles can rise smoothly and fully contact and react with the slurry, thereby maintaining a good desulfurization effect.
[0024] Secondly, this application also provides a control method for a wet desulfurization device, which includes the following steps using the aforementioned wet desulfurization device: Flue gas is introduced into the inlet pipe, and after passing through the gas distribution ring pipe and the gas distribution connecting pipe, it is discharged from the gas distribution nozzle. The flue gas forms bubbles in the slurry and rises to the middle of the desulfurization tower. The slurry at the bottom of the slurry chamber flows into the clarification tank, where it is clarified. The spray assembly draws the clarified liquid from the clarification tank and sprays it onto the flue gas in the desulfurization tower. The flue gas then passes through the demister and is discharged from the desulfurization tower. The rotating assembly drives the cleaning assembly and the aeration oxidation assembly to rotate. The cleaning assembly brushes the gas distribution assembly, and the aeration oxidation assembly intermittently aerates the slurry. The bottom scraper removes the deposits on the bottom wall of the slurry chamber.
[0025] By adopting the above technical solution, flue gas enters through the inlet pipe, passes through the gas distribution ring pipe and the gas distribution connecting pipe, and exits through the gas distribution nozzle, forming bubbles in the slurry. This allows the flue gas to contact the slurry first and then the clarified liquid from the spray, resulting in more complete flue gas reaction and mass transfer, thus improving desulfurization efficiency. The rotating component drives the cleaning component to rotate, which brushes the gas distribution component, reducing clogging of the gas distribution nozzle. The rotating component also drives the aeration oxidation component to rotate, making the aerated air more evenly distributed in the slurry. The aeration oxidation component intermittently aerates the slurry, reducing interference between the aeration bubbles and the bubbles in the flue gas. After clarification in the clarification tank, the slurry is drawn up and sprayed by the spraying component for better desulfurization treatment. Finally, the flue gas exits the desulfurization tower after passing through the demister.
[0026] In summary, this application includes at least one of the following beneficial effects: 1. Flue gas enters from the flue gas inlet pipe and passes through the gas distribution connecting pipe and the gas distribution ring pipe before being discharged from the flue gas nozzle. It forms bubbles in the slurry. The flue gas first contacts the slurry and then contacts the clarified liquid sprayed by the spraying component, which makes the flue gas reaction and mass transfer more complete and improves the desulfurization efficiency. 2. The rotating component drives the cleaning component to rotate, and the cleaning brush sweeps the smoke distribution component, reducing the deposition of deposits on the air distribution pipe and the smoke distribution nozzle, reducing the clogging of the smoke distribution nozzle. In addition, the rotating cleaning component stirs the slurry, so that the air bubbles come into more full contact with the slurry. 3. The aeration oxidation component aerates the slurry, which is beneficial for the formation of gypsum in the slurry. The rotating component drives the aeration oxidation component to rotate, so that the aerated air and the slurry come into more sufficient contact. In addition, the projection of the aeration nozzle and the flue gas nozzle on the horizontal plane is staggered, which reduces the impact of the aeration bubbles on the flue gas bubbles. Attached Figure Description
[0027] Figure 1 This is an overall schematic diagram of the wet desulfurization device and control method according to an embodiment of this application; Figure 2 This is a schematic diagram of the structure of the smoke distribution assembly and the cleaning assembly according to an embodiment of this application; Figure 3 This is a bottom view of the smoke distribution assembly and cleaning assembly according to an embodiment of this application; Figure 4This is a schematic diagram of the structure of the cleaning component in an embodiment of this application.
[0028] Explanation of reference numerals in the attached drawings: 1. Desulfurization tower; 11. Slurry chamber; 2. Spray assembly; 21. Spray pump; 22. Spray pipe network; 3. Smoke distribution assembly; 31. Smoke inlet pipe; 32. Air distribution pipe; 321. Air distribution ring pipe; 322. Air distribution connecting pipe; 33. Smoke nozzle; 4. Rotating assembly; 41. Rotation drive source; 42. Transmission component; 5. Cleaning assembly; 51. Support rod; 511. Outer support rod; 512. Inner support rod; 52. Cleaning brush; 6. Aeration oxidation assembly; 61. Gas delivery pipe; 62. Aeration branch pipe; 63. Bottom scraper; 64. Aeration nozzle; 7. Clarifying tank; 8. Demister. Detailed Implementation
[0029] The following combination Figures 1 to 4 This application will be described in further detail.
[0030] This application provides a wet desulfurization device and control method.
[0031] refer to Figure 1 A wet desulfurization device includes a desulfurization tower 1, a spray assembly 2, a smoke distribution assembly 3, a rotating assembly 4, a cleaning assembly 5, an aeration oxidation assembly 6, a clarifier 7, and a demister 8. A slurry chamber 11 is located at the bottom of the desulfurization tower 1, and the slurry chamber 11 contains slurry. The clarifier 7 is connected to the bottom of the slurry chamber 11. A portion of the slurry and sediment in the slurry chamber 11 flows into the clarifier 7, where the slurry and sediment are clarified. This results in sediment accumulating at the bottom of the clarifier 7, while the top of the clarifier 7 contains clarified liquid. In this embodiment, the sediment is mainly gypsum.
[0032] refer to Figure 1 The spray assembly 2 includes a spray pump 21 and a spray pipe network 22. The spray pipe network 22 is installed inside the desulfurization tower 1. The spray pump 21 is connected to the spray pipe network 22 and the clarification tank 7 through pipes. The spray pump 21 pumps the clarified liquid to the spray pipe network 22 and sprays it out. After the sprayed clarified liquid comes into contact with the flue gas, it falls back to the slurry chamber 11, realizing the self-circulation of the slurry.
[0033] refer to Figure 2 and Figure 3The smoke distribution assembly 3 includes a smoke inlet pipe 31, a gas distribution pipe 32, and smoke distribution nozzles 33. The gas distribution pipe 32 includes a gas distribution ring pipe 321 and a gas distribution connecting pipe 322. Multiple gas distribution ring pipes 321 are provided; in this embodiment, two gas distribution ring pipes 321 are provided. Adjacent gas distribution ring pipes 321 are connected through the gas distribution connecting pipe 322. The smoke inlet pipe 31 extends into the desulfurization tower 1 and is connected to the gas distribution connecting pipe 322. Multiple smoke distribution nozzles 33 are evenly distributed along the gas distribution ring pipe 321, located on the inner and outer sides of the gas distribution ring pipe 321, and are connected to the gas distribution ring pipe 321.
[0034] refer to Figure 1 and Figure 2 The slurry immerses the smoke distribution assembly 3. When smoke is introduced into the smoke inlet pipe 31, the smoke passes through the air distribution connecting pipe 322 and the air distribution ring pipe 321 and is discharged from the smoke distribution nozzle 33, causing the smoke to form bubbles in the slurry, which is beneficial for the contact between the smoke and the slurry. In this embodiment, the sediment in the slurry is collected in the clarification tank 7, which can reduce the possibility of sediment clogging the smoke distribution nozzle 33.
[0035] refer to Figure 1 After the flue gas comes into contact with the slurry, the slurry washes away the dust and impurities in the flue gas, leaving them embedded in the slurry. The flue gas rises after contact with the slurry and comes into contact with the clarifying liquid sprayed by the spray assembly 2, thus ensuring more thorough contact between the flue gas and the slurry and improving desulfurization efficiency. A demister 8 is installed at the inner top of the desulfurization tower 1. The flue gas passes through the demister 8 and exits the desulfurization tower 1. In this embodiment, two demisters 8 are provided, which can further reduce the moisture carried in the flue gas.
[0036] refer to Figure 2 and Figure 3 For the two gas distribution ring pipes 321, in the top-to-bottom direction, the projection of one gas distribution ring pipe 321 overlaps the outer side of the projection of the other gas distribution ring pipe 321 with a gap, so that the gas bubbles are more evenly distributed in the slurry. In other embodiments of this example, only one gas distribution ring pipe 321 may be provided.
[0037] refer to Figure 1 The aeration oxidation component 6 includes an air supply pipe 61, an aeration branch pipe 62, a bottom scraper 63, and an aeration nozzle 64. The air supply pipe 61 is sleeved on the outside of the flue gas inlet pipe 31, the aeration branch pipe 62 is connected to the air supply pipe 61, and the aeration nozzle 64 is connected to the aeration branch pipe 62. Air is introduced into the air supply pipe 61, and the air passes through the aeration branch pipe 62 and is discharged into the slurry through the aeration nozzle 64 to form bubbles, thereby forming gypsum in the slurry. In the top-to-bottom direction, the projection of the aeration nozzle 64 on the horizontal plane is offset from the projection of the flue gas nozzle 33 on the horizontal plane to reduce the impact of the rising aeration bubbles on the flue gas bubbles.
[0038] refer to Figure 1 The rotating assembly 4 includes a rotation drive source 41 and a transmission component 42. The rotation drive source 41 is specifically a motor, and the transmission component 42 is specifically a gear set. The transmission component 42 is mounted on the gas supply pipe 61. The gas supply pipe 61 is rotatably connected to the desulfurization tower 1. The rotation drive source 41 drives the gas supply pipe 61 to rotate through the transmission component 42. The gas supply pipe 61 drives the aeration branch pipe 62 to rotate, and the aeration branch pipe 62 drives the aeration nozzle 64 to rotate, so that the air bubbles have more sufficient contact with the slurry.
[0039] refer to Figure 2 and Figure 4 The cleaning component 5 includes a support rod 51 and a cleaning brush 52. The support rod 51 includes an outer support rod 511 and an inner support rod 512. The outer support rod 511 is fixedly connected to the aeration branch pipe 62, and the inner support rod 512 is fixedly connected to the outer support rod 511. The outer support rod 511 is located outside the air distribution ring pipe 321, and the inner support rod 512 is located inside the air distribution ring pipe 321. Multiple cleaning brushes 52 are provided, each fixedly connected to the outer support rod 511 and the inner support rod 512. The cleaning brushes 52 can contact the air distribution pipe 32 and the air distribution nozzle 33. When the rotating component 4 drives the aeration oxidation component 6 to rotate, the aeration oxidation component 6 drives the cleaning component 5 to rotate, causing the cleaning brushes 52 to brush the air distribution pipe 32 and the air distribution nozzle 33, reducing the deposition of deposits on the air distribution pipe 32 and the air distribution nozzle 33, and reducing the possibility of clogging of the air distribution nozzle 33.
[0040] refer to Figure 1 The bottom scraper 63 is fixedly connected to the aeration branch pipe 62 and the air supply pipe 61 respectively. The slurry chamber 11 gradually narrows from top to bottom, and the bottom scraper 63 abuts against the inner bottom wall of the slurry chamber 11. When the rotating component 4 drives the aeration oxidation component 6 to rotate, the bottom scraper 63 scrapes off the deposits located on the inner wall of the slurry chamber 11, allowing the deposits to enter the clarification tank 7, reducing the accumulation of deposits in the slurry chamber 11, thereby reducing the possibility of deposits clogging the flue gas nozzle 33 and the aeration nozzle 64.
[0041] This application also provides a control method for a wet desulfurization device, including the following steps: Flue gas is introduced into the inlet pipe 31. After passing through the gas distribution ring pipe 321 and the gas distribution connecting pipe 322, the flue gas is discharged from the flue gas nozzle 33. The flue gas forms bubbles in the slurry and rises to the middle of the desulfurization tower 1. The slurry at the bottom of the slurry chamber 11 flows into the clarification tank 7. The slurry is clarified in the clarification tank 7. The spray assembly 2 draws the clarified liquid from the clarification tank 7 and sprays the clarified liquid onto the flue gas in the desulfurization tower 1. Then the flue gas passes through the demister 8 and is discharged from the desulfurization tower 1. The rotating assembly 4 drives the cleaning assembly 5 and the aeration oxidation assembly 6 to rotate. The cleaning assembly 5 brushes the flue gas distribution assembly 3, and the aeration oxidation assembly 6 intermittently aerates the slurry. The aeration oxidation assembly 6 scrapes off the deposits on the bottom wall of the slurry chamber 11.
[0042] The implementation principle of the wet desulfurization device and control method in this application embodiment is as follows: the flue gas distribution component 3 causes the flue gas to form bubbles in the slurry, allowing the flue gas to contact the slurry. After the flue gas rises, it contacts the clarified liquid sprayed by the spray component 2, thereby making the desulfurization of the flue gas more complete. The rotating component 4 drives the aeration oxidation component 6 and the cleaning component 5 to rotate, so that the aeration oxidation component 6 can evenly aerate the slurry, causing the slurry to form gypsum; and the cleaning component 5 can brush the flue gas distribution component 3, reducing the possibility of clogging of the flue gas nozzle 33.
[0043] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A wet desulfurization device, characterized in that: It includes a desulfurization tower (1), a spray assembly (2), a smoke distribution assembly (3), a clarifier (7), and a demister (8); the bottom of the desulfurization tower (1) is provided with a slurry chamber (11), which contains slurry; The smoke distribution assembly (3) is disposed in the slurry chamber (11) and is immersed in the slurry. The smoke distribution assembly (3) includes a smoke inlet pipe (31), an air distribution pipe (32), and smoke distribution nozzles (33). Smoke is introduced into the smoke inlet pipe (31) and is connected to the air distribution pipe (32). Multiple smoke distribution nozzles (33) are disposed along the air distribution pipe (32) and are connected to the air distribution pipe (32). The clarification tank (7) is connected to the bottom of the slurry chamber (11). The spray assembly (2) draws the clarified liquid in the clarification tank (7) and sprays the clarified liquid onto the flue gas. The demister (8) is connected to the top of the desulfurization tower (1). The flue gas passes through the demister (8) and is discharged from the desulfurization tower (1).
2. The wet desulfurization device according to claim 1, characterized in that: The air distribution pipe (32) includes an air distribution ring pipe (321) and an air distribution connecting pipe (322). Multiple air distribution ring pipes (321) are provided, and the air distribution connecting pipe (322) connects the multiple air distribution ring pipes (321). The air distribution nozzle (33) is connected to the air distribution ring pipe (321), and the multiple air distribution nozzles (33) are located on the inner and outer sides of the air distribution ring pipe (321) respectively.
3. A wet desulfurization device according to claim 2, characterized in that: The projections of the multiple air distribution rings (321) on the horizontal plane are interlocked and spaced apart.
4. A wet desulfurization device according to claim 1, characterized in that: It also includes a rotating component (4) and a cleaning component (5), wherein the rotating component (4) drives the cleaning component (5) to rotate, so that the cleaning component (5) brushes the smoke distribution component (3).
5. A wet desulfurization device according to claim 4, characterized in that: The cleaning assembly (5) includes a support rod (51) and a cleaning brush (52), the cleaning brush (52) being connected to the support rod (51) and the cleaning brush (52) being used to contact the cloth nozzle (33).
6. A wet desulfurization device according to claim 4, characterized in that: The desulfurization tower is equipped with an aeration oxidation component (6), which is connected to the cleaning component (5). The rotating component (4) drives the aeration oxidation component (6) to rotate, and the aeration oxidation component (6) aerates the slurry.
7. A wet desulfurization device according to claim 6, characterized in that: The aeration oxidation component (6) includes an air supply pipe (61), an aeration branch pipe (62), and an aeration nozzle (64). Air is supplied through the air supply pipe (61), the aeration branch pipe (62) is connected to the air supply pipe (61), and the aeration nozzle (64) is connected to the aeration branch pipe (62).
8. A wet desulfurization device according to claim 7, characterized in that: The aeration oxidation component (6) also includes a bottom scraper (63), which is connected to the aeration branch pipe (62); the bottom end of the slurry chamber (11) is tapered from top to bottom, and the bottom scraper (63) abuts against the bottom wall of the slurry chamber (11); when the rotating component (4) drives the aeration oxidation component (6) to rotate, the bottom scraper (63) scrapes off the deposits on the bottom wall of the slurry chamber (11).
9. A wet desulfurization device according to claim 7, characterized in that: The aeration nozzle (64) and the smoke nozzle (33) are misaligned in their projections on the horizontal plane.
10. A control method for a wet desulfurization unit, characterized in that: Using a wet desulfurization apparatus as described in any one of claims 1-9 includes the following steps: Flue gas is introduced into the inlet pipe (31). After passing through the gas distribution ring pipe (321) and the gas distribution connecting pipe (322), the flue gas is discharged from the gas distribution nozzle (33). The flue gas forms bubbles in the slurry and rises to the middle of the desulfurization tower (1). The slurry at the bottom of the slurry chamber (11) flows into the clarification tank (7). The slurry is clarified in the clarification tank (7). The spray assembly (2) draws the clarified liquid in the clarification tank (7) and sprays the clarified liquid onto the flue gas in the desulfurization tower (1). Then the flue gas passes through the demister (8) and is discharged from the desulfurization tower (1). The rotating assembly (4) drives the cleaning assembly (5) and the aeration oxidation assembly (6) to rotate. The cleaning assembly (5) brushes the gas distribution assembly (3). The aeration oxidation assembly (6) aerates the slurry intermittently. The bottom scraper (63) scrapes off the deposits on the bottom wall of the slurry chamber (11).