Wet desulfurization tower

Abstract

The utility model discloses a wet desulfurization tower. The wet desulfurization tower comprises a slurry pool, a tower body and a tower body, the oxidation air system comprises an oxidation air spray gun and an oxidation air pipe network, the oxidation air spray gun is used for spraying oxidation air into the slurry pond, the oxidation air pipe network is arranged in the slurry pond and used for conveying the oxidation air into the slurry pond, and in the vertical direction, the oxidation air spray gun is arranged on the lower side of the oxidation air pipe network, and the oxidation air spray gun and the oxidation air pipe network are arranged at an interval; the partition pieces are arranged in the slurry pond, the partition pieces and pipelines in the oxidation air pipe network are arranged in a staggered mode in the horizontal direction, and the partition pieces are configured to prevent the oxidation air from flowing upwards. According to the wet desulfurization tower disclosed by the utility model, oxidation reaction can be efficiently and fully carried out in the slurry pond when the wet desulfurization tower is operated, so that the oxidation effect in the wet desulfurization process is better and more stable, and the stability and the economical efficiency of the wet desulfurization tower are better when the wet desulfurization tower is operated.

Description

Technical Field

[0001] This utility model relates to the field of flue gas desulfurization technology, and in particular to a wet desulfurization tower. Background Technology

[0002] In wet desulfurization, oxidation air is typically introduced into the slurry tank of the desulfurization tower to ensure the stability of the desulfurization products and the quality of the produced gypsum. However, in related technologies, the oxidation air introduced into the slurry tank often suffers from uneven distribution and incomplete mixing with the slurry. This results in insufficient oxidation reaction within the slurry tank during wet desulfurization, low efficiency, and poor stability of the oxidation effect, leading to low operating efficiency, instability, and poor economic performance of the desulfurization tower. Utility Model Content

[0003] This utility model is based on the discoveries of the inventor of this application regarding the following facts and problems:

[0004] In related technologies, wet desulfurization towers typically use either a single pipeline oxidation air supply method or a spray gun agitation oxidation air supply method to deliver air into the slurry tank. The pipeline oxidation air supply method suffers from uneven airflow distribution and is prone to clogging, while the spray gun agitation oxidation air supply method suffers from uneven agitation and insufficient local oxidation. As a result, the oxidation reaction in the wet desulfurization process is insufficient, the oxidation efficiency is low, and the oxidation effect is unstable, thus resulting in low operating efficiency and poor economic and stability of the wet desulfurization tower.

[0005] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a wet desulfurization tower that can make the oxidation effect in the wet desulfurization process more stable and the oxidation efficiency higher, thereby enabling the wet desulfurization tower to operate efficiently and stably with better economic benefits.

[0006] The wet desulfurization tower according to this utility model includes: a slurry tank; an oxidation air system, the oxidation air system including: oxidation air spray guns and oxidation air pipelines, the oxidation air spray guns being used to spray oxidation air into the slurry tank, the oxidation air pipelines being disposed in the slurry tank and used to transport oxidation air into the slurry tank, the oxidation air spray guns being disposed below the oxidation air pipelines and spaced apart from the oxidation air pipelines in the vertical direction; and a separator, the separator being disposed in the slurry tank and arranged horizontally in a staggered manner with the pipelines in the oxidation air pipelines, the separator being configured to obstruct the upward flow of oxidation air.

[0007] According to this utility model, a wet desulfurization tower is constructed by setting up an oxidation air system, which includes oxidation air spray guns and an oxidation air pipeline network. The oxidation air spray guns are located below the oxidation air pipeline network and are spaced apart from it. The oxidation air spray guns and the oxidation air pipeline network work together to deliver oxidation air into the slurry pool, so that the oxidation air can be delivered and distributed more fully, evenly and efficiently to all areas of the slurry pool. Furthermore, the separators, together with the oxidation air pipeline network, hinder the upward flow of the oxidation air, which greatly increases the residence time of the oxidation air in the slurry. This allows the oxidation reaction to take place efficiently and fully in the slurry pool during the operation of the wet desulfurization tower, resulting in a better and more stable oxidation effect during the wet desulfurization process, and improving the stability and economy of the wet desulfurization tower during operation.

[0008] In some embodiments of this utility model, the oxidation air duct network includes multiple air supply pipes, which are arranged at intervals in the horizontal direction. In the extension direction of the air supply pipes, multiple exhaust holes are provided at intervals on the lower side of the air supply pipes. In the flow direction of the oxidation air in the air supply pipes, the air supply pipes extend downward at an angle.

[0009] In one embodiment of this utility model, the angle between the gas delivery pipe and the horizontal plane is greater than or equal to 2° and less than or equal to 6°.

[0010] In one embodiment of the present invention, the oxidation air duct network further includes multiple connecting branch pipes, which are connected to two adjacent air transmission pipes, and the multiple connecting branch pipes are arranged at intervals in the horizontal direction.

[0011] In some embodiments of this utility model, the oxidation air spray gun is disposed on the side wall of the slurry tank, the nozzle end of the oxidation air spray gun extends into the slurry tank, and there are multiple oxidation air spray guns, which are arranged at intervals along the circumference of the slurry tank. The wet desulfurization tower further includes: multiple agitators, which are arranged one-to-one with the multiple oxidation air spray guns, and the nozzles of the oxidation air spray guns are arranged close to the blades of the agitators; and a slurry circulation pump, in which the nozzles of some of the oxidation air spray guns are arranged close to the inlet of the slurry circulation pump.

[0012] In one embodiment of this utility model, the number of oxidation air spray guns is greater than or equal to 3 and less than or equal to 6.

[0013] In some embodiments of this utility model, the oxidation air spray gun includes a spray pipe, one end of which extends into the slurry pool to form the nozzle. Around the nozzle, the spray pipe is also provided with a plurality of spray holes, which are arranged at intervals along the periphery of the spray pipe.

[0014] In some embodiments of this utility model, the oxidation air spray gun includes a spray pipe, one end of which extends into the slurry pool and forms the nozzle, and the length of the spray pipe is adjustable.

[0015] In one embodiment of this utility model, the nozzle includes: a first pipe section, which is fixed to the side wall of the slurry pool and extends into the slurry pool; a second pipe section, which is disposed in the slurry pool and extends along the vertical direction, with the lower end of the second pipe section forming the nozzle; and a connecting sleeve, which is sleeved on the first pipe section and the second pipe section, and the first pipe section and the second pipe section are connected by the connecting sleeve, with the second pipe section and the connecting sleeve being slidably connected along the vertical direction.

[0016] In some embodiments of this utility model, the oxidation air system further includes: a first fan, wherein there is at least one first fan, and the outlet of the first fan is connected to the oxidation air spray gun; a second fan, wherein there is at least one second fan, and the outlet of the second fan is connected to the oxidation air duct network; and a control system, wherein the control system is electrically connected to the first fan and the second fan.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a wet desulfurization tower according to an embodiment of the present utility model;

[0019] Figure 2 This is a schematic diagram of an oxidation air duct network according to an embodiment of the present utility model;

[0020] Figure 3 This is a schematic diagram of the gas transmission pipe, support beam, and guide pipe in the oxidation air duct network according to an embodiment of the present utility model;

[0021] Figure 4 This is a partial schematic diagram of the gas supply pipe at the exhaust port according to an embodiment of the present utility model;

[0022] Figure 5 This is a schematic diagram of an oxidation air spray gun according to an embodiment of the present utility model.

[0023] Figure label:

[0024] 10. Slurry tank;

[0025] 20. Oxidation air duct network; 21. Gas transmission pipe; 211. Exhaust vent; 22. Guide pipe; 23. Support beam;

[0026] 30. Oxidation air spray gun; 301. Spray nozzle;

[0027] 31. Nozzle; 311. First pipe section; 312. Second pipe section; 313. Connecting sleeve; 32. Support frame; 33. Reinforcing plate;

[0028] 40. Stirrer; 50. Divider;

[0029] 100. Wet desulfurization tower. Detailed Implementation

[0030] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0031] The following is for reference. Figures 1-5 Description of a wet desulfurization tower 100 according to an embodiment of the present invention.

[0032] like Figures 1-5 As shown, the wet desulfurization tower 100 according to an embodiment of the present invention includes: a slurry tank 10, an oxidation air system, and a separator 50. The oxidation air system includes: an oxidation air spray gun 30 and an oxidation air pipeline network 20. The oxidation air spray gun 30 is used to spray oxidation air into the slurry tank 10. The oxidation air pipeline network 20 is located inside the slurry tank 10 and is used to transport oxidation air into the slurry tank 10 in the vertical direction (e.g., ...). Figure 1 (As shown in the vertical direction), the oxidation air spray gun 30 is located on the lower side of the oxidation air duct network 20 and is arranged at intervals with the oxidation air duct network 20; the separator 50 is located in the slurry tank 10 and is arranged alternately with the oxidation air duct network 20 in the horizontal direction, and the separator 50 is configured to obstruct the upward flow of oxidation air.

[0033] In this embodiment, the oxidation system is equipped with an oxidation air pipeline network 20 and an oxidation air spray gun 30. When the wet desulfurization tower 100 is in operation, the oxidation air system can use the oxidation air pipeline network 20 to deliver oxidation air into the slurry tank 10 in a pipeline-type oxidation air manner. The pipeline-type oxidation air means that multiple pipes with micropores are arranged in the upper part of the slurry tank 10. The oxidation air is distributed through the micropores to form fine bubbles and dispersed into the slurry tank 10, which can cover a large processing area of ​​the slurry tank 10, so that the oxidation air can be distributed more evenly in the slurry tank 10, thereby making the oxidation reaction in the slurry tank 10 more uniform.

[0034] When the wet desulfurization tower 100 is operating, the oxidation air system can also use the oxidation air spray gun 30 to deliver oxidation air into the slurry tank 10 in a spray gun agitation mode. Spray gun agitation mode means that the oxidation air is injected into the slurry tank 10 at high speed through the oxidation air spray gun 30, which agitates the slurry, making the oxidation air and slurry mix more thoroughly, resulting in a more complete and efficient oxidation reaction. In this embodiment, by setting up the oxidation air spray gun 30 and the oxidation air pipeline network 20 in the oxidation air system, the oxidation air system can flexibly use either the oxidation air pipeline network 20 or the oxidation air spray gun 30 to deliver oxidation air into the slurry tank 10 as needed during the operation of the wet desulfurization tower 100, thereby achieving a stable oxidation effect.

[0035] The oxidation air system can also simultaneously supply oxidation air to the slurry tank 10 using oxidation air pipeline 20 and oxidation air spray gun 30 as needed. When oxidation air pipeline 20 and oxidation air spray gun 30 supply oxidation air to the slurry tank 10 at the same time, the oxidation air pipeline 20 supplies oxidation air to the slurry tank 10 evenly, which can effectively compensate for the uneven stirring and insufficient local oxidation that may occur when oxidation air is supplied by oxidation air spray gun 30. For example, oxidation air pipeline 20 can effectively cover the area of ​​slurry tank 10 that is far away from oxidation air spray gun 30, so that the slurry in the area of ​​slurry tank 10 far away from oxidation air spray gun 30 can obtain oxidation air from oxidation air pipeline 20. This allows sufficient oxidation air to be supplied to each area of ​​slurry tank 10, making the oxidation reaction in slurry tank 10 more complete and reducing the probability of insufficient local oxidation, thereby achieving a stable oxidation effect in the wet desulfurization process.

[0036] For example, in locations where the airflow in the oxidation air duct network 20 is insufficient, the oxidation air spray gun 30 can temporarily increase the amount of oxidation air supplied to the slurry pool 10 at that location. This helps to compensate for the insufficient amount of oxidation air supplied by the oxidation air duct network 20 in that area. The oxidation air spray gun 30 can be positioned in locations where the oxidation air supplied by the oxidation air duct network 20 is difficult to reach, thus cooperating with the oxidation air duct network 20 to supply oxidation air to the slurry pool 10. This makes the distribution of oxidation air in all areas of the slurry pool 10 more uniform and sufficient, thereby making the oxidation reaction in the wet desulfurization process more complete and efficient. The oxidation effect is more stable. The high-speed airflow ejected from the oxidation air spray gun 30 forms turbulence in the slurry pool 10, which can disturb small particles or other impurities in the slurry to a certain extent. This can help to clear blockages in the oxygen pipeline network, reduce the probability of blockages in the oxidation air pipeline network 20, and enable the oxidation air pipeline network 20 and the oxidation air spray gun 30 to cooperate more stably and efficiently for air supply operations. It can also reduce the frequency and difficulty of maintenance operations such as cleaning blockages in the oxidation air pipeline network 20, making the maintenance of the wet desulfurization tower 100 more convenient during long-term operation.

[0037] Understandably, during wet desulfurization, when the volume of oxidation air is insufficient, hemihydrate and dihydrate gypsum crystals easily form in the slurry tank 10. These crystals can easily clog pipes and internal components, thus exacerbating wear and tear on the equipment in the wet desulfurization tower 100 and reducing its lifespan. This reduces the operational stability and reliability of the wet desulfurization tower 100 during long-term operation and makes its maintenance more troublesome. In addition, insufficient oxidation air volume can also reduce the desulfurization efficiency of the wet desulfurization tower 100 and increase the risk of pollutant emissions exceeding standards. The decrease in desulfurization efficiency requires the wet desulfurization tower 100 to increase the amount of limestone used and the number of circulating pumps and other equipment, which increases the operating cost of the wet desulfurization tower 100 and makes its operation uneconomical.

[0038] In this embodiment, by setting up an oxidation air spray gun 30 and an oxidation air pipeline 20 in the oxidation air system, the oxidation air spray gun 30 and the oxidation air pipeline 20 work together to deliver air, making the oxidation air more stable, uniform and fully distributed in all areas of the slurry tank 10. This makes the oxidation reaction in the slurry tank 10 more complete and efficient during the wet desulfurization process, resulting in higher oxidation efficiency and significantly reducing the probability of crystal formation. This allows the wet desulfurization tower 100 to operate more stably and reliably, and makes the maintenance of the wet desulfurization tower 100 more convenient and the operating cost lower during long-term operation, thus improving the operational stability and economy of the wet desulfurization tower 100.

[0039] In this embodiment, the oxidation air spray gun 30 is located on the lower side of the oxidation air pipeline network 20 and is arranged at intervals with the oxidation air pipeline network 20. The structure is simple and the arrangement is reasonable. It can make the oxidation air spray gun 30 and the oxidation air pipeline network 20 work together well, so that the oxidation air system can cover a large processing area in the slurry tank 10 in the vertical direction. This allows the oxidation air system to efficiently and evenly and stably deliver oxidation air to various areas in the slurry tank 10.

[0040] It is understandable that since the oxidizing air is a gas, after it is introduced into the slurry, it tends to flow upwards and overflow from the slurry tank 10. The short residence time of the oxidizing air in the slurry makes it difficult for the oxidizing air to mix thoroughly with the slurry, thus reducing the utilization rate of the introduced oxidizing air and consequently lowering the oxidation efficiency within the slurry tank 10. In this embodiment, the separator 50 and the pipes in the oxidizing air network 20 are arranged in a staggered horizontal direction to impede the upward flow of the oxidizing air. This effectively slows down the rate at which the oxidizing air overflows from the slurry and prolongs its residence time within the slurry. This allows the oxidizing air introduced during system operation to participate more fully in the oxidation reaction within the slurry tank 10, further enhancing the oxidation effect.

[0041] Furthermore, the separator 50 obstructs the upward flow of the oxidation air, causing the content of oxidation air introduced by the oxidation air duct network 20 and the oxidation air spray gun 30 in the slurry pool 10 to be higher in the area below the oxidation air duct network 20 than in the area above the oxidation air duct network 20. This allows the slurry area below the oxidation air duct network 20 to form an oxidation zone with low pH, while the slurry area above the oxidation air duct network 20 can form a neutralization zone with high pH. Here, low pH refers to a pH (Pondus Hydrogenii) value of 4.5-5.5, and high pH refers to a pH value of 5.1-6.3.

[0042] With the introduction of oxidation air, the slurry below 20mm in the oxidation air duct network primarily oxidizes calcium sulfite to calcium sulfate, i.e., gypsum. A small amount of sulfuric acid is produced during this oxidation process, resulting in a lower pH in the oxidation zone. This reduces the oxygen-sulfur ratio in the slurry, leading to higher oxidation efficiency and better results in the slurry tank, which is beneficial for producing high-purity gypsum. Above 20mm in the oxidation air duct network, the slurry mainly absorbs sulfur dioxide from the flue gas. Fresh lime slurry is typically added to the neutralization zone as needed to replenish the calcium carbonate consumption. The bicarbonate ions present in the limestone slurry can be further hydrolyzed into hydroxide ions, resulting in a higher pH in the neutralization zone. This promotes the absorption of sulfur dioxide by the slurry, reduces the diffusion resistance of gas and liquid molecules, ensures high desulfurization efficiency, and allows the wet desulfurization tower to operate more efficiently.

[0043] In this embodiment, the separator 50 can cooperate with the oxidation air pipeline network 20 to disperse the oxidation air to a certain extent, so that the oxidation air introduced into the slurry can be dispersed to form finer bubbles, thereby allowing the oxidation air to mix with the slurry more efficiently and carry out the oxidation reaction. Therefore, in this embodiment, there can be multiple separators 50, and multiple separators can be arranged in an alternating manner with the pipelines in the oxidation air pipeline network 20. For example, the separator 50 can be a pool separator, so that the separator 50 can more flexibly and conveniently regulate the flow of gas and slurry in the slurry pool 10 as needed, so that the wet desulfurization tower can carry out desulfurization operations more stably and efficiently.

[0044] According to an embodiment of the present invention, the wet desulfurization tower 100 is equipped with an oxidation air system and a separator 50. The oxidation air system includes an oxidation air spray gun 30 and an oxidation air pipeline network 20. The oxidation air spray gun 30 is arranged on the lower side of the oxidation air pipeline network 20 and spaced apart from it. The oxidation air spray gun 30 and the oxidation air pipeline network 20 work together to deliver oxidation air into the slurry tank 10, so that the oxidation air can be delivered and distributed more fully, evenly and efficiently to various areas of the slurry tank 10. The separator 50, together with the oxidation air pipeline network 20, hinders the upward flow of the oxidation air, which greatly increases the residence time of the oxidation air in the slurry. Thus, when the wet desulfurization tower 100 is in operation, the oxidation reaction in the slurry tank 100 can be carried out efficiently and fully, so that the oxidation effect in the wet desulfurization process is better and more stable, and the stability and economy of the wet desulfurization tower 100 during operation are better.

[0045] In some embodiments of this utility model, the distance between the oxidation air spray gun 30 and the oxidation air duct network 20 in the vertical direction is greater than or equal to 1m and less than or equal to 3m.

[0046] In this embodiment, the vertical distance between the oxidation air spray gun 30 and the oxidation air pipeline 20 is set to be greater than or equal to 1m. This ensures a suitable distance between the oxidation air spray gun 30 and the oxidation air pipeline 20, allowing the oxidation air delivered by the oxidation air pipeline 20 to have sufficient diffusion range between them when they work together. This allows the oxidation air to fully diffuse into the slurry, reducing the overlap between the spray range of the oxidation air spray gun 30 and the delivery range of the oxidation air pipeline 20 in the vertical direction. As a result, the oxidation air system can efficiently deliver oxidation air to various areas in the slurry tank 10, enabling the oxidation air system to operate efficiently.

[0047] In this embodiment, the vertical distance between the oxidation air spray gun 30 and the oxidation air pipeline 20 is set to be less than or equal to 3mm. This avoids an excessively large distance between the oxidation air spray gun 30 and the oxidation air pipeline 20, which would prevent the oxidation air delivered by the oxidation air pipeline 20 and the oxidation air spray gun 30 from reliably and stably covering the area between them. This allows the oxidation air system to stably deliver oxidation air to various areas in the slurry tank 10, resulting in a better and more stable oxidation reaction in the slurry tank 10 during the wet desulfurization process. For example... Figure 1 As shown in the figure, h represents the vertical distance between the oxidation air spray gun 30 and the oxidation air duct network 20. h can be 1m, 1.2m, 1.5m, 2m, 2.1m, 2.3m, 2.7m, 3m, etc.

[0048] In some embodiments of this utility model, reference is made to Figure 2 , Figure 3 and Figure 4As shown, the oxidation air duct network 20 may include multiple air supply pipes 21, which are arranged at intervals in the horizontal direction. In the extension direction of the air supply pipes 21, multiple exhaust holes 211 are provided at intervals on the lower side of the air supply pipes 21. In the flow direction of the oxidation air in the air supply pipes 21, the air supply pipes 21 extend downward at an angle.

[0049] In this embodiment, the oxidation air duct network 20 includes multiple air supply pipes 21, which are arranged at intervals in the horizontal direction. In the extension direction of the air supply pipes 21, multiple exhaust holes 211 are provided at intervals on the lower side of the air supply pipes 21. The structure is simple and meets the usage requirements of the oxidation air duct network 20.

[0050] In this embodiment, the gas supply pipe 21 is configured to extend downwards at an angle along the flow direction of the oxidation air. This allows the oxidation air to flow more smoothly along the gas supply pipe 21, avoiding the slurry stagnation and scaling that can occur when the gas supply pipe 21 is horizontally arranged. This significantly reduces the possibility of scaling on the gas supply pipe 21, making its operation more stable and maintenance easier. For example, the size, spacing, distribution, and angle of the exhaust holes 211 can be rationally set according to the oxidation air requirements under different working conditions. This satisfies the need for the oxidation air pipeline network 20 to uniformly and stably deliver and disperse the oxidation air into the slurry tank 10, forming a fine and uniform bubble flow. This allows the oxidation air pipeline network 20 to stably, uniformly, and continuously supply air.

[0051] In one embodiment of this utility model, reference is made to Figure 3 As shown, the angle between the gas pipeline 21 and the horizontal plane can be greater than or equal to 2° and less than or equal to 6°.

[0052] In this embodiment, the angle between the gas supply pipe 21 and the horizontal plane is set to be greater than or equal to 2° and less than or equal to 6°. This allows the gas supply pipe 21 to be within a suitable tilt angle range, enabling the oxidation air to flow out of the exhaust port 211 in an optimal flow state to contact the slurry, thereby promoting the oxidation reaction. Simultaneously, the gas supply pipe 21 can stably cover the oxidation reaction area in the slurry tank 10 in the vertical direction, ensuring stable operation of the oxidation air system. For example... Figure 3 As shown in the figure, α represents the angle between the gas pipe 21 and the horizontal plane. α can be 2°, 2.2°, 2.5°, 3°, 4°, 4.5°, 5°, 6°, etc.

[0053] In some embodiments of this utility model, such as Figure 2 and Figure 3 As shown, the outlet end of the gas transmission pipe 21 may be provided with a guide pipe 22, which is used to guide the oxidation air from the inlet end to the outlet end of the gas transmission pipe 21.

[0054] It is understandable that during the process of the oxidizing air flowing along the gas supply pipe 21 to the outlet end of the gas supply pipe 21, part of the oxidizing air flow is discharged from multiple exhaust holes 211, which gradually reduces the air volume of the oxidizing air in the gas supply pipe 21. Due to pressure loss and other factors, the flow stability of the oxidizing air flow decreases, and there is a situation where the oxidizing air flow is not easy to reach the outlet end of the gas supply pipe 21 to stably supply gas to the slurry pool 10.

[0055] In this embodiment, a guide pipe 22 is provided at the outlet end of the gas transmission pipe 21. The guide pipe 22 is used to guide the oxidation air from the inlet end to the outlet end of the gas transmission pipe 21. The guide pipe 22 can stabilize the flow of oxidation air in the gas transmission pipe 21 and reduce the probability of turbulence when oxidation air is directly discharged from the outlet end. This can reduce the energy loss of oxidation air flow in the gas transmission pipe 21 to a certain extent and improve the stability of the air flow direction. This allows the oxidation air flow to flow stably along the gas transmission pipe 21 to the outlet end, and allows the oxidation air pipeline network 20 to stably deliver oxidation air to the slurry tank 10.

[0056] For example, the number of gas supply pipes 21 can be two, three, four, five, six, etc. Multiple gas supply pipes 21 are arranged at intervals in the horizontal direction, and the extension direction of multiple gas supply pipes 21 can be the same. Each gas supply pipe 21 is provided with a guide pipe 22 at its outlet end.

[0057] In one embodiment of this utility model, reference is made to Figures 1-3 As shown, one end of the guide pipe 22 can be connected to the gas supply pipe 21, and the other end of the guide pipe 22 extends downward and forms an air outlet, which can be inclined relative to the horizontal plane.

[0058] In this embodiment, one end of the guide pipe 22 is connected to the gas supply pipe 21 and the other end extends downward to form an air outlet. The structure is simple and can effectively guide the oxidation air into the slurry pool 10 in the vertical direction. To a certain extent, it can coordinate the flow direction of the oxidation air at the outlet end of the gas supply pipe 21 with the flow direction of the slurry in the slurry pool 10, so that the oxidation air can be better distributed in the slurry pool 10 and the oxidation reaction effect is better.

[0059] In this embodiment, the air outlet is inclined relative to the horizontal plane, which can increase the outlet area of ​​the guide pipe 22, so that the oxidation air can flow out of the guide pipe 22 more stably and smoothly, thereby making the oxidation air pipeline network 20 operate more stably.

[0060] In some examples of this utility model, references Figures 1-3 As shown, the air outlet can be arranged towards the center of the slurry tank 10.

[0061] In this embodiment, the air outlet is arranged facing the middle of the slurry tank 10, so that the oxidation air flows out away from the side wall of the slurry tank 10 when it flows out of the air outlet. This can effectively reduce the obstruction effect of the side wall of the slurry tank 10 on the diffusion of the oxidation air in the slurry, and allow the oxidation air flowing out of the guide pipe 22 to be more smoothly dispersed into the slurry of the slurry tank 10.

[0062] In one embodiment of this utility model, reference is made to Figure 2 As shown, the oxidation air duct network 20 may also include multiple connecting branch pipes, which are connected to two adjacent air transmission pipes 21, and the multiple connecting branch pipes are arranged at intervals in the horizontal direction.

[0063] In this embodiment, multiple connecting branch pipes are used to connect two adjacent gas supply pipes 21. The structure is simple and allows multiple gas supply pipes 21 and multiple connecting branch pipes within the oxidation air network 20 to form an interwoven network structure. This allows the oxidation air network 20 to be distributed in a grid pattern in the horizontal direction and stably cover the entire cross-section of the slurry tank 10, enabling the oxidation air network 20 to stably supply air to various areas of the slurry tank 10. For example, exhaust holes can also be provided on the lower side of the connecting branch pipes.

[0064] In some embodiments of this utility model, such as Figure 1 As shown, the oxidation air spray gun 30 can be installed on the side wall of the slurry tank 10, with the nozzle end of the oxidation air spray gun 30 extending into the slurry tank 10. There are multiple oxidation air spray guns 30, which are arranged at intervals along the circumference of the slurry tank 10. The wet desulfurization tower 100 may also include multiple agitators 40 and a slurry circulation pump. The multiple agitators 40 are arranged in a one-to-one correspondence with the multiple oxidation air spray guns 30, and the nozzles of the oxidation air spray guns 30 are arranged close to the blades of the agitators 40. Among the multiple oxidation air spray guns 30, some of the nozzles of the oxidation air spray guns 30 are arranged close to the inlet of the slurry circulation pump.

[0065] In this embodiment, the oxidation air spray gun 30 is disposed on the side wall of the slurry tank 10 with its nozzle end extending into the slurry tank 10. This simple structure facilitates the arrangement of the oxidation air spray gun 30 and meets its usage requirements. Multiple oxidation air spray guns 30 are arranged at intervals along the circumference of the slurry tank 10, ensuring a more uniform distribution of oxidation air within the slurry tank 10 when they are sprayed in conjunction. Multiple agitators 40 are arranged in a one-to-one correspondence with the multiple oxidation air spray guns 30, with the nozzles of the spray guns positioned close to the blades of the agitators 40. This allows the oxidation air sprayed from the nozzles to mix more thoroughly and quickly with the slurry under the agitation of the blades, resulting in more efficient and uniform diffusion of the oxidation air throughout the slurry tank 10. The agitators 40 also break up air bubbles in the slurry, ensuring a more stable and reliable mixing of the oxidation air with the slurry. This leads to a better oxidation reaction effect and higher oxidation efficiency in the slurry tank 10, resulting in higher quality gypsum.

[0066] The high-speed airflow from the oxidation air spray gun 30 can also clean the oxidation air pipeline 20 to a certain extent. When the oxidation air spray gun 30 is running, the impact force generated by the high-speed airflow can effectively remove impurities and deposits attached to the exhaust holes 211 of the oxidation air pipeline 20, prevent the exhaust holes 211 from being blocked, and ensure that the oxidation air pipeline 20 is always unobstructed and can stably deliver oxidation air to the slurry tank 10.

[0067] In this embodiment, the nozzle of some of the oxidation air spray guns 30 is also arranged close to the inlet of the slurry circulation pump, so that the oxidation air sprayed from the nozzle can be enhanced by the suction of the slurry circulation pump to improve the stirring effect, thereby making the oxidation air sprayed from the oxidation air spray guns 30 mix with the slurry more efficiently.

[0068] For example, the number of oxidation air spray guns 30 can be two, three, four, five, six, etc., and the agitator 40 can be arranged accordingly with two, three, four, five, six, etc. For example, when the number of oxidation air spray guns 30 is five, the nozzles of two oxidation air spray guns 30 can be close to the slurry circulation pump and the slurry arrangement of the agitator 40.

[0069] In this embodiment, the nozzle is arranged close to the blade, which can mean that the nozzle is arranged near the periphery of the blade or that the nozzle is directly facing the blade. Similarly, the nozzle is arranged close to the inlet of the slurry circulation pump, which can mean that the nozzle is arranged near the periphery of the inlet or that the nozzle is directly facing the inlet. The specific arrangement of the nozzle of the oxidation air spray gun 30 and the blade of the agitator 40, as well as the arrangement of the nozzle of the oxidation air spray gun 30 and the inlet of the blade circulation pump, can be adjusted and arranged according to actual needs and the desired operating effect.

[0070] For example, the arrangement of the oxidation air spray guns 30 around the slurry pool 10 can be adjusted and optimized according to the needs of oxidation air delivery, so that multiple oxidation air spray guns 30 can work together to form the best oxidation air delivery effect. The direction and angle of the oxidation air sprayed from the nozzle of the spray gun can also be adjusted according to the flow characteristics of the slurry and the required distribution of oxidation air volume in different areas, so as to make the contact efficiency between oxidation air and slurry higher, thereby improving oxidation efficiency.

[0071] In one embodiment of this utility model, the number of oxidation air spray guns 30 can be greater than or equal to 3 and less than or equal to 6.

[0072] In this embodiment, the number of oxidation air spray guns 30 is set to 3 or more. This ensures that there are enough oxidation air spray guns 30 to stably meet the needs of the oxidation reaction by delivering oxidation air in the circumferential direction of the slurry tank 10, allowing the wet desulfurization tower 100 to maintain efficient operation. Setting the number of oxidation air spray guns 30 to 6 or less avoids the increased maintenance difficulty and equipment cost caused by a larger number of oxidation air spray guns 30. This arrangement of oxidation air spray guns 30, while meeting usage requirements, makes maintenance of the wet desulfurization tower 100 easier and maintains good operational economy. For example, the number of oxidation air spray guns 30 can be 3, 4, 5, or 6. The number of oxidation air spray guns 30 can be set according to actual needs.

[0073] In some embodiments of this utility model, such as Figure 5 As shown, the oxidation air spray gun 30 may include a spray pipe 31. One end of the spray pipe 31 extends into the slurry pool 10 to form a nozzle. Around the nozzle, the spray pipe 31 is also provided with multiple spray holes, which are arranged at intervals along the periphery of the spray pipe 31.

[0074] In this embodiment, multiple nozzles are arranged around the nozzle, spaced apart circumferentially along the nozzle pipe 31. This simple structure allows the delivery of oxidation air from a single outlet to multiple outlets, effectively coordinating with the nozzle to increase and enrich the spray range and spray pattern of the oxidation air spray gun 30. This enables the oxidation air spray gun 30 to better deliver oxidation air into the slurry, allowing for better mixing and agitation of the oxidation air flow with the slurry, thus improving the diffusion of oxidation air into the slurry to a certain extent. When the oxidation air spray gun 30 delivers oxidation air into the slurry pool 10, the oxidation air can be ejected from the nozzle at a stable and high speed. Simultaneously, oxidation air is ejected into the slurry from multiple nozzles. For example, the diameter, spacing, and angular relationship of the nozzles to the nozzle can be determined based on the flow field distribution, oxidation requirements, and diffusion patterns of the oxidation air within the slurry pool 10 under different operating conditions.

[0075] In some embodiments of this utility model, reference is made to Figure 5As shown, the oxidation air spray gun 30 may include a nozzle 31, one end of which extends into the slurry pool 10 and forms a nozzle. The length of the nozzle 31 is adjustable.

[0076] In this embodiment, the length of the nozzle 31 is adjustable, allowing the oxidation air spray gun 30 to flexibly adjust the length of the nozzle 31 extending into the slurry tank 10 as needed. This changes the spraying position of the nozzle within the slurry, enabling the oxidation air sprayed by the oxidation air spray gun 30 to be adjusted according to the oxidation situation. This avoids oxidation dead zones and ensures that the oxidation air can stably and reliably cover all corners of the slurry tank 10. The oxidation air spray gun 30 can also provide targeted supplementary oxidation to areas that are difficult for the oxidation air pipeline network 20 to reach. This ensures that the oxidation air can more stably, fully, and evenly cover all areas of the slurry tank 10, resulting in better efficiency and more stable effects of the oxidation reaction within the slurry tank 10.

[0077] In one embodiment of this utility model, such as Figure 5 As shown, the nozzle 31 includes: a first pipe section 311, a second pipe section 312, and a connecting sleeve 313. The first pipe section 311 is fixed to the side wall of the slurry tank 10 and extends into the slurry tank 10. The second pipe section 312 is disposed in the slurry tank 10 and extends in the vertical direction, and the lower end of the second pipe section 312 forms a nozzle. The connecting sleeve 313 is sleeved on the first pipe section 311 and the second pipe section 312. The first pipe section 311 and the second pipe section 312 are connected by the connecting sleeve 313, and the second pipe section 312 and the connecting sleeve 313 are slidably connected in the vertical direction.

[0078] In this embodiment, the nozzle 31 includes a first pipe section 311, which is fixed to the side wall of the slurry tank 10 and extends into the slurry tank 10. This structure is simple and facilitates connection of the nozzle 31 to an air supply device outside the slurry tank 10. A second pipe section 312 is connected to the first pipe section 311 via a connecting sleeve 313 and is slidably connected to the connecting sleeve 313, allowing the second pipe section 312 to move vertically relative to the first pipe section 311. This enables the nozzle's position within the slurry tank 10 to be easily moved as needed. The structure is simple and effectively meets usage requirements. For example, the relative position of the second pipe section 312 and the connecting sleeve 313 can be fixed by friction locking, ensuring the nozzle maintains its position stably after adjustment.

[0079] In some examples of this utility model, such as Figure 5 As shown, the oxidation air spray gun 30 may further include: a support frame 32 and a reinforcing plate 33. The support frame 32 is disposed inside the slurry tank 10 and fixed on the side wall of the slurry tank 10. The support frame 32 extends horizontally toward the middle of the slurry tank 10 and is fastened to the connecting sleeve 313. The reinforcing plate 33 is disposed between the support frame 32 and the side wall of the slurry tank 10 and abuts against the side wall of the slurry tank 10.

[0080] In this embodiment, the oxidation air spray gun 30 is provided with a support frame 32 and a reinforcing plate 33. The support frame 32 is fixed on the side wall of the slurry tank 10 and is tightly connected to the connecting sleeve 313. The structure is simple and can play a stable fixing role for the connecting sleeve 313, so that the spray pipe 31 can be stably arranged in the slurry tank 10, and the oxidation air spray gun 30 can stably perform air supply operation. The reinforcing plate 33 is set between the support frame 32 and the side wall and abuts against the side wall, which can play a good reinforcing role for the support frame 32, so that the support frame 32 can more stably and reliably support and fix the connecting sleeve 313.

[0081] In some embodiments of this utility model, the oxidation air system may further include: a first fan, a second fan, and a control system. The number of first fans is at least one, and the air outlet of the first fan is connected to the oxidation air spray gun 30. The number of second fans is at least one, and the air outlet of the second fan is connected to the oxidation air duct network 20. The control system is electrically connected to the first fan and the second fan.

[0082] In this embodiment, the wet desulfurization tower 100 is equipped with at least one first blower outlet connected to the oxidation air spray gun 30. The structure is simple, and the first blower can stably supply oxidation air to the oxidation air spray gun 30, allowing the oxidation air spray gun 30 to inject an oxidation air flow of appropriate pressure and velocity into the slurry tank 10, which can well meet the operational needs of the oxidation air spray gun 30. In this embodiment, there is at least one first blower. The number of first blowers can be reasonably set according to the operational needs of the wet desulfurization tower 100. For example, when the wet desulfurization tower 100 is small in scale or the demand for oxidation air is not high, only one first blower is needed. When the wet desulfurization tower 100 is large in scale and has a high flow rate processing requirement, multiple first blowers can be arranged to provide a larger air volume, ensuring a stable and sufficient supply of oxidation air in the slurry tank 10, and improving the flexibility and stability of the wet desulfurization tower 100 during operation.

[0083] For example, when the wet desulfurization tower 100 equipped with multiple primary blowers is operating at low load or the sulfur content in the treated flue gas is low, only one of the primary blowers needs to operate to supply air to the oxidation air spray gun 30, which is sufficient to meet the operational needs of the wet desulfurization tower 100. When the wet desulfurization tower 100 is operating at full load or the sulfur content in the flue gas is high, the number of primary blowers can be increased according to the needs of the desulfurization operation, so that the oxidation air spray gun 30 can meet the oxidation air supply needs of the wet desulfurization tower 100 under different operating conditions. This can, to a certain extent, avoid energy waste caused by operating too many primary blowers, thereby significantly improving the operational economy of the wet desulfurization tower 100. For example, the number of primary blowers can be one, two, three, four, etc.

[0084] In this embodiment, the wet desulfurization tower 100 is equipped with at least one second fan. The outlet of the second fan is connected to the oxidation air pipeline 20. The structure is simple. The second fan can stably deliver oxidation air to the oxidation air pipeline 20, so that the oxidation air pipeline 20 can stably deliver oxidation air to the slurry tank 10, thus meeting the use and operation needs of the oxidation air pipeline 20. In this embodiment, the number of second fans is at least one. The number of second fans can be reasonably set according to the operational needs of the wet desulfurization tower 100. For example, when the wet desulfurization tower 100 is small in scale or the demand for oxidation air is not high, one second fan is sufficient to meet the operational needs of the wet desulfurization tower 100. When the wet desulfurization tower 100 is large in scale and has a high flow rate processing requirement, the number of second fans can be arranged according to actual needs, so that the oxidation air pipeline network 20 can meet the oxidation air delivery needs of the wet desulfurization tower 100 under different operating conditions. This can, to a certain extent, avoid energy waste caused by too many second fans being turned on, thereby greatly improving the operational economy of the wet desulfurization tower 100. For example, the number of second fans can be one, two, three, four, etc.

[0085] In this embodiment, a second fan supplies air to the oxidation air duct network 20, and a first fan supplies air to the oxidation air spray gun 30. This ensures that the oxidation air flow into the oxidation air duct network 20 and the oxidation air flow into the oxidation air spray gun 30 do not interfere with each other. The first fan can stably supply oxidation air to the oxidation air spray gun 30, and at the same time, the second fan can also stably supply oxidation air to the oxidation air duct network 20. This avoids problems such as uneven air volume distribution and insufficient air volume that occur when the oxidation air duct network 20 and the oxidation air spray gun 30 share the same fan. When the oxidation air duct network 20 and the oxidation air spray gun 30 operate in conjunction, they can stably and reliably supply oxidation air to the slurry tank 10, thereby enabling the oxidation air system to operate efficiently and stably.

[0086] In this embodiment, a first fan supplies air to the oxidation air spray gun 30, and a second fan supplies air to the oxidation air duct network 20. This allows the oxidation air duct network 20 and the oxidation air spray gun 30 to be redundant during operation. For example, if one of the oxidation air duct network 20 or the oxidation air spray gun 30 malfunctions or requires maintenance, the other can still operate to allow the wet desulfurization tower 100 to continue its wet desulfurization operation. This makes the operation of the wet desulfurization tower 100 more efficient and improves its operational stability and reliability. Furthermore, the oxidation air spray gun 30 and the oxidation air duct network 20 are supplied with air independently by the first and second fans, respectively. This allows the oxidation air system to more flexibly deliver oxidation air to the slurry tank 10 according to the needs of wet desulfurization.

[0087] For example, when the wet desulfurization tower 100 is operating at low load or the flue gas being treated has a low sulfur content, the oxidation air system can use only the oxidation air spray gun 30 or the oxidation air pipeline 20 to deliver oxidation air into the slurry tank 10. When the wet desulfurization tower 100 is operating at full load and the flue gas has a high sulfur content, the oxidation air spray gun 30 and the oxidation air pipeline 20 can work together to deliver oxidation air into the slurry tank 10 simultaneously.

[0088] In this embodiment, the control system is electrically connected to the first and second fans. The structure is simple and can easily and stably regulate the supply of oxidation air from the oxidation air spray gun 30 and the oxidation air pipeline 20 to the slurry tank 10. This allows the oxidation air spray gun 30 and the oxidation air pipeline 20 to work together better, resulting in better oxidation effect and higher efficiency when the wet desulfurization tower 100 is in operation.

[0089] For example, airflow regulating valves can be installed at the outlets of the first and second blowers. The control system can be electrically connected to the pressure sensor and the airflow regulating valves to ensure that the oxidation air volume delivered by the oxidation air spray gun 30 meets the needs of wet desulfurization operations, and that the oxidation air volume delivered by the oxidation air pipeline network 20 meets the needs of wet desulfurization operations or better coordinates with the delivery of the oxidation air spray gun 30. For instance, when the wet desulfurization tower 100 is operating, in the initial stage of the oxidation reaction in the slurry tank 10, the oxidation air volume sprayed by the oxidation air spray gun 30 can be adjusted to be larger by the airflow regulating valve to quickly stir the slurry and promote the start-up of the oxidation reaction. In the middle and later stages of the oxidation reaction, the oxidation air volume delivered by the oxidation air pipeline network 20 can be adjusted to be larger by the airflow regulating valve to ensure the uniformity of the oxidation reaction in the slurry tank 10.

[0090] For example, pressure sensors are installed at the inlet of the oxidation air spray gun 30 and the inlet of the oxidation air pipeline 20 in the wet desulfurization tower 100, and the control system can be electrically connected to the pressure sensors. This allows the control system to adjust the operation of the first and second fans in real time based on the air pressure information obtained from the pressure sensors, making the air pressure of the oxidation air spray gun 30 and the air pressure of the oxidation air pipeline 20 more stable. This allows the oxidation air to be evenly distributed in all areas of the slurry pool 10 when the oxidation air spray gun 30 and the oxidation air pipeline 20 work together to ensure that the slurry is fully stirred. This results in better oxidation effect when the wet desulfurization tower 100 is operating.

[0091] For example, the control system can adjust and control the temperature of the oxidation air introduced into the slurry tank 10 so that the oxidation air can undergo a more efficient oxidation reaction with the slurry. For example, a temperature sensor can be installed in the pipeline of the oxidation air network 20 and the oxidation air spray gun 30 to detect the temperature of the delivered oxidation air. The temperature sensor can be electrically connected to the control system.

[0092] For example, various sensors can be electrically connected to the controller system in the slurry tank 10, allowing the control system to monitor the reaction in the slurry tank 10 in real time. This enables the control system to adjust the operation of the oxidation air system in a timely manner, ensuring that the oxidation air system consistently and efficiently supplies the required oxidation air to the slurry tank 10. This, in turn, makes the wet desulfurization tower 100 more efficient during operation, maintaining high oxidation efficiency and stable oxidation effects, thus ensuring high-quality gypsum production. For instance, the slurry tank 10 can be equipped with pH sensors, oxidation-reduction potential sensors, sulfite concentration sensors, solids content sensors, sealing sensors, etc., to meet the control system's monitoring needs for various parameters during the wet desulfurization process. The control system can then adjust the oxidation air system based on the information obtained from these sensors, ensuring the efficient operation of the wet desulfurization tower 100.

[0093] For example, the control system can be an automatic control system. The control system can analyze the data according to the preset algorithm and model, judge the cooperative operation effect of the oxidation air pipeline 20 and the oxidation air spray gun 30, and dynamically adjust the oxidation air system based on the analysis results using an adaptive control strategy. For example, when the concentration of sulfite in the slurry is high, the control system can control the oxidation air system to increase the air volume of the oxidation air or adjust the spray angle and spray speed of the oxidation air spray gun 30. For example, when the oxidation air system experiences abnormalities such as pipeline blockage or fan failure, the control system can control the oxidation air system to switch to standby mode in time or take fault handling measures to quickly handle the abnormality and enable the wet desulfurization tower 100 to operate efficiently.

[0094] In one embodiment of this utility model, the oxidation air duct network 20 can be configured in multiple layers, with the multiple layers arranged at intervals in the vertical direction. This allows the oxidation air duct network 20 to better cover all areas of the slurry tank 10 in the vertical direction, thereby enabling the oxidation air to be distributed more efficiently and evenly into the slurry in the slurry tank 10, resulting in a higher oxidation reaction efficiency in the slurry tank 10. The multiple layers of oxidation air duct network 20 can be used in conjunction with the oxidation air spray gun 30 for air supply operations, making the distribution of oxidation air in the slurry tank 10 more uniform and the oxidation reaction between the slurry and the oxidation air more complete. Optionally, the spacing between the multiple layers of oxidation air duct network 20 and the distance between the bottommost oxidation air duct network 20 and the oxidation air spray gun 30 can be reasonably adjusted as needed to meet the requirement of uniform distribution of oxidation air into the slurry tank 10.

[0095] The following will refer to Figures 1-5 This invention describes a wet desulfurization tower 100 according to a specific embodiment of the present invention.

[0096] like Figures 1-5As shown, the wet desulfurization tower 100 includes a slurry tank 10, an oxidation air system, an agitator 40, a slurry circulation pump, and a control system. The oxidation air system includes an oxidation air duct network 20, oxidation air spray guns 30, a first fan, and a second fan. The oxidation air duct network 20 is arranged within the slurry tank 10 and below the liquid surface. The oxidation air duct network 20 may include six gas transmission pipes 21, which are arranged in parallel in the horizontal direction. The six gas transmission pipes 21 can be installed in the slurry tank 10 by means of a support beam 23, which may be a steel beam. A guide pipe 22 is provided at the outlet end of the gas transmission pipe 21. The guide pipe 22 extends downward in the vertical direction to form a gas outlet. Multiple exhaust holes 211 are opened on the lower side of the gas transmission pipe 21 along its extension direction. The exhaust holes 211 are micropores. Multiple micropores can be arranged along the extension direction of the gas transmission pipe 21 and arranged in multiple rows along the circumference of the gas transmission pipe 21 to meet the exhaust needs of the gas transmission pipe 21. The number and arrangement of micropores can be reasonably arranged according to actual needs. For example, the outlet end of the gas transmission pipe 21 can extend downward at an angle, which can reduce the probability of slurry deposition and scaling blockage in the gas transmission pipe 21.

[0097] The primary fan consists of one unit, which supplies air to the oxidation air network 20 via a pipeline. A pressure sensor is installed at the inlet of the oxidation air network 20, and the pressure sensor is electrically connected to the control system. The pipe material and diameter of the oxidation air network 20 can be reasonably configured as needed to ensure smooth airflow and reduce the probability of blockage.

[0098] Five oxidation air spray guns 30 are arranged at intervals around the circumference of the slurry tank 10. Five agitators 40 are also provided, each corresponding to one of the five oxidation air spray guns 30. The oxidation air spray guns 30 and agitators 40 are located at the bottom of the slurry tank 10. The distance between the nozzle of the oxidation air spray gun 30 and the bottom of the tank can be greater than or equal to 3 meters to avoid obstructing the diffusion and flow of the sprayed oxidation air, ensuring stable mixing of the oxidation air with the slurry. The inlet of the slurry circulation pump is located inside the slurry tank 10 at the bottom. The nozzles of all five oxidation air spray guns 30 are arranged close to the blades of the agitators 40, with two of the nozzles also close to the inlet of the slurry circulation pump. Two secondary blowers supply air to the oxidation air spray guns 30 through pipelines. Pressure sensors are installed at the inlets of the oxidation air spray guns 30, and these pressure sensors are electrically connected to the control system. The type and specifications of the oxidation air spray guns 30 can be selected as needed.

[0099] When the wet desulfurization tower 100 is operating, the oxidation air pipeline network 20 and oxidation air spray guns 30 in the oxidation air system work together. The spray gun-type agitation oxidation air can compensate for the problem of insufficient agitation in local areas of the pipeline oxidation air in the slurry pool 10, while the pipeline oxidation air can ensure the uniform distribution of oxidation air. This makes the oxidation reaction in each area of ​​the slurry pool 10 more complete and stable, thereby improving the overall oxidation efficiency in the wet desulfurization process. When the wet desulfurization tower 100 is operating, the control system can adjust the air supply of the oxidation air system in real time according to the slurry state and oxidation reaction in the slurry pool 10 to achieve the best oxidation effect. For example, when the wet desulfurization tower 100 is started, the oxidation air pipeline network 20 starts working first, slowly releasing oxidation air into the slurry pool in the form of uniform bubbles, initially establishing the oxidation environment. As desulfurization operations proceed, when the oxidation effect is poor or the oxidation reaction rate slows down in certain areas of the slurry, the oxidation air spray gun 30 will quickly activate. The high-speed oxidation airflow ejected by the oxidation air spray gun 30 creates strong turbulence in the slurry, which not only accelerates the mixing of oxidation air and slurry but also disturbs and diffuses the oxidation air transported by the oxidation air pipeline 20, making the distribution of oxidation air in the slurry more uniform and further enhancing the oxidation reaction. The oxidation air pipeline 20 and the oxidation air spray gun 30 cooperate and complement each other, allowing the oxidation air to be delivered and distributed more fully, evenly, and efficiently to all areas of the slurry pool 10. This ensures that the oxidation reaction in the slurry pool 10 is efficient and sufficient during the operation of the wet desulfurization tower 100, resulting in a better and more stable oxidation effect in the wet desulfurization process.

[0100] The following describes an example of the practical application of this utility model. In a large thermal power plant, the wet desulfurization system faces problems such as poor oxidation effect and unstable gypsum quality during operation. After modification, the oxidation air system of the wet desulfurization tower 100 was changed from the original two large oxidation fans 2×23400Nm3 / h (one in use and one on standby) to three small flow oxidation fans 2×11700Nm3 / h (two in use and one on standby). When the wet desulfurization tower 100 is operating at low load or when the sulfur dioxide concentration in the treated flue gas is low, only one oxidation fan is turned on to supply the oxidation air pipeline 20 of the absorption tower. The first fan is the second fan. When the wet desulfurization tower 100 is operating at full load and the sulfur dioxide concentration at the flue gas desulfurization inlet is greater than 3500 mg / Nm3, two oxidation fans operate. One fan's airflow goes to the oxidation air duct network 20 within the wet desulfurization tower 100; this fan is the second fan. The other fan's airflow goes to the oxidation air spray gun 30 within the wet desulfurization tower 100; this fan is the first fan. The first and second fans operate synchronously without interference, preventing uneven airflow distribution between the two ducts. When the wet desulfurization tower 100 is operating at full load and the sulfur dioxide concentration at the flue gas desulfurization inlet is greater than 5200 mg / Nm3, three oxidation fans operate. Two fans' airflow goes to the oxidation air spray gun 30 within the wet desulfurization tower 100, and the other fan's airflow goes to the oxidation air duct network 20 within the wet desulfurization tower 100.

[0101] Using the arrangement of oxidation air duct network 20 and oxidation air spray gun 30 in this embodiment, after a period of testing, the oxidation rate of sulfite increased from less than 85% to over 98%, which greatly improved the purity and quality of gypsum. Furthermore, due to the more complete oxidation, the operating cost of the wet desulfurization tower 100 and its environmental impact were reduced.

[0102] In this embodiment, an oxidation air system is set up, which includes oxidation air spray guns 30 and oxidation air pipelines 20. The oxidation air spray guns 30 are arranged below the oxidation air pipelines 20 and spaced apart from them. The oxidation air spray guns 30 and the oxidation air pipelines 20 work together to deliver oxidation air to the slurry tank 10, so that the oxidation air can be delivered and distributed more fully, evenly and efficiently to all areas of the slurry tank 10. This allows the oxidation reaction to be carried out efficiently and fully in the slurry tank 10 when the wet desulfurization tower 100 is in operation, making the oxidation effect in the wet desulfurization process better and more stable, and allowing sulfite to be fully oxidized into sulfate, thereby improving the quality of the produced gypsum. The oxidation air pipelines 20 and the oxidation air spray guns 30 cooperate and can operate independently, so that if one of them fails or needs maintenance, the wet desulfurization tower 100 can still operate normally, making the operation of the wet desulfurization tower 100 more stable and reliable, and easier to maintain.

[0103] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0104] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0105] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0106] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0107] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A wet desulfurization tower, characterized in that, include: Slurry tank (10); An oxidation air system, comprising: an oxidation air spray gun (30) and an oxidation air pipeline (20), wherein the oxidation air spray gun (30) is used to spray oxidation air into the slurry tank (10), and the oxidation air pipeline (20) is located in the slurry tank (10) and is used to transport oxidation air into the slurry tank (10). In the vertical direction, the oxidation air spray gun (30) is located on the lower side of the oxidation air pipeline (20) and is spaced apart from the oxidation air pipeline (20). A separator (50) is provided in the slurry tank (10) and is arranged horizontally in a staggered manner with the pipelines in the oxidation air network (20). The separator (50) is configured to obstruct the upward flow of oxidation air.

2. The wet desulfurization tower according to claim 1, characterized in that, The oxidation air duct network (20) includes multiple air supply pipes (21), which are arranged at intervals in the horizontal direction. In the extension direction of the air supply pipes (21), multiple exhaust holes are provided at intervals on the lower side of the air supply pipes (21). In the flow direction of the oxidation air in the air supply pipes (21), the air supply pipes (21) extend downward at an angle.

3. The wet desulfurization tower according to claim 2, characterized in that, The angle between the gas pipeline (21) and the horizontal plane is greater than or equal to 2° and less than or equal to 6°.

4. The wet desulfurization tower according to claim 2, characterized in that, The oxidation air duct network (20) also includes multiple connecting branch pipes, which are connected to two adjacent gas transmission pipes (21), and the multiple connecting branch pipes are arranged at intervals in the horizontal direction.

5. The wet desulfurization tower according to any one of claims 1-4, characterized in that, The oxidation air spray gun (30) is disposed on the side wall of the slurry tank (10), and the nozzle end of the oxidation air spray gun (30) extends into the slurry tank (10). There are multiple oxidation air spray guns (30), which are arranged at intervals along the circumference of the slurry tank (10). The wet desulfurization tower also includes: Multiple agitators (40) are arranged in a one-to-one correspondence with multiple oxidation air spray guns (30), and the nozzles of the oxidation air spray guns (30) are arranged close to the blades of the agitators (40). The slurry circulation pump, in which the nozzles of some of the oxidation air spray guns (30) are arranged close to the inlet of the slurry circulation pump.

6. The wet desulfurization tower according to claim 5, characterized in that, The number of oxidation air spray guns (30) is greater than or equal to 3 and less than or equal to 6.

7. The wet desulfurization tower according to claim 5, characterized in that, The oxidation air spray gun (30) includes a spray pipe (31), one end of which extends into the slurry pool (10) to form the nozzle. Around the nozzle, the spray pipe (31) is also provided with a plurality of spray holes (301), which are arranged at intervals along the periphery of the spray pipe (31).

8. The wet desulfurization tower according to claim 5, characterized in that, The oxidation air spray gun (30) includes a nozzle (31), one end of which extends into the slurry pool (10) and forms the nozzle. The length of the nozzle (31) is adjustable.

9. The wet desulfurization tower according to claim 8, characterized in that, The nozzle (31) includes: The first pipe section (311) is fixed to the side wall of the slurry tank (10) and extends into the slurry tank (10); The second pipe section (312) is located in the slurry tank (10) and extends in the vertical direction. The lower end of the second pipe section (312) forms the nozzle. A connecting sleeve (313) is sleeved on the first pipe segment (311) and the second pipe segment (312). The first pipe segment (311) and the second pipe segment (312) are connected through the connecting sleeve (313). The second pipe segment (312) is slidably connected to the connecting sleeve (313) in the up-down direction.

10. The wet desulfurization tower according to any one of claims 1-4, characterized in that, The oxidation air system also includes: The first fan, the number of the first fan is at least one, and the air outlet of the first fan is connected to the oxidation air spray gun (30); The second fan, the number of the second fan is at least one, and the air outlet of the second fan is connected to the oxidation air duct network (20); A control system is electrically connected to the first fan and the second fan.

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