An integrated fixed bed desulfurization, denitrification and dust removal device

Abstract

The present application relates to the technical field of flue gas purification, and in particular to an integrated fixed-bed desulfurization, denitrification and dust removal device, comprising a support tank, an exhaust port is provided at the upper end of the support tank, an air intake frame is provided on one side of the support tank, and a dust collector located at the upper end of the air intake frame is provided in the support tank; the dust collector comprises a dust hood arranged in the support tank and located at the upper end of the air intake frame, a hydrophobic plate is provided at the upper end of the dust hood, a partition plate is provided in the dust hood, the partition plate divides the dust hood into a dust collecting chamber and a dust removal chamber, and a plurality of U-shaped tubes are penetrated on the partition plate; the desulfurizer sprayed by the present invention will react to the flue gas just entering the support tank, and wash away part of the dust and particulate matter in the flue gas, and preliminarily reduce the temperature of the flue gas to reduce the dust removal pressure of the dust collecting chamber and the dust removal chamber, and the desulfurizer is circulated in the desulfurization chamber, which not only improves the use efficiency of the desulfurizer, but also reduces the consumption of the desulfurizer.

Description

Technical Field

[0001] The present application relates to the technical field of flue gas purification, and in particular to an integrated fixed-bed desulfurization, denitrification and dust removal device. Background Art

[0002] Fixed-bed desulfurization and denitrification is a flue gas purification technology that removes sulfur dioxide (SO2) and nitrogen oxides (NOx) from flue gas by filling specific desulfurization and denitrification materials in a fixed-bed reactor. This technology is particularly suitable for the treatment of flue gas emitted by industrial boilers, power plants, etc.

[0003] During the desulfurization process, SO2 in the flue gas reacts chemically with the desulfurizer (such as limestone, calcium oxide, etc.) filled in the fixed bed to mainly produce calcium sulfate (CaSO4). This process is usually carried out at a lower temperature, effectively converting harmful gases into harmless or low-harmful substances; the denitrification process involves the reaction of NOx with the desulfurizer or a specific catalyst, converting it into nitrogen (N2) and water (H2O), thereby reducing NOx emissions. This process may require a specific catalyst to promote the reaction.

[0004] During the fixed-bed desulfurization and denitrification process, a certain amount of dust will be generated due to the reaction between the solid particles carried in the flue gas and the desulfurizer, as well as the wear of the desulfurizer itself. The dust is mainly composed of incompletely reacted desulfurizer particles, fly ash in the flue gas, and by-products generated by the reaction.

[0005] In order to ensure that the discharged flue gas meets environmental protection standards, dust removal is usually carried out after the desulfurization and denitrification process, such as the vertical fixed bed desulfurization and denitrification dust removal equipment and its use method with publication number CN117138548B, which relates to the field of flue gas treatment technology. The prior art includes a shell, and an air inlet and an air outlet are provided at both ends of the shell. Four flue gas treatment bins are provided in the shell, and both side walls of each flue gas treatment bin inside the shell are provided with grille plates, and the grille plates are inclined from the outside to the inside relative to each flue gas treatment bin. A feed port is provided at the top of each flue gas treatment bin, and a discharge port is provided at the bottom of each flue gas treatment bin. The four flue gas treatment bins are respectively the first desulfurization bin, the second desulfurization bin, the spare desulfurization bin and the denitrification bin from the air inlet side to the air outlet side. The first desulfurization bin is adjacent to the second desulfurization bin, the spare desulfurization bin is adjacent to the denitrification bin, and a mixing chamber is provided between the second desulfurization bin and the spare desulfurization bin.

[0006] However, the above existing technologies still have some defects in desulfurization, denitrification and dust removal:

[0007] 1. In the above-mentioned prior art, desulfurizers and desulfurizers capture particulate matter (i.e., smoke dust) in the flue gas during the desulfurization and denitrification processes. These particulate matter include solid particulate matter such as dust, coal powder, fly ash, etc. generated during the combustion process. The capture of particulate matter will accelerate the consumption of desulfurizers and desulfurizers, resulting in them requiring more frequent replacement or regeneration, thereby increasing maintenance costs; at the same time, the accumulation of particulate matter may cover the active surface of the desulfurizers and desulfurizers, reducing their chance of contact with the desulfurizers and desulfurizers in the flue gas, thereby reducing the desulfurization and denitrification efficiency.

[0008] 2. The above-mentioned prior art captures particulate matter (i.e., smoke dust) in flue gas during the desulfurization and denitrification process through desulfurizers and denitrifiers, and the smoke dust generated in different industrial production may have different chemical compositions, particle sizes, densities, adhesion and other characteristics. Due to the different characteristics of smoke dust, the reaction efficiency of desulfurizers and denitrifiers with smoke dust may be different. The physical properties of smoke dust (such as particle size and hardness) may cause wear or blockage of desulfurization and denitrification equipment. For example, hard particles may wear the desulfurization and denitrification agent filling layer inside the equipment, while fine particles may block the vents or pores of the desulfurization and denitrification agents.

[0009] Based on this, and according to the above-mentioned viewpoints, there is still room for improvement in the existing technologies for desulfurization, denitrification and dust removal. Summary of the invention

[0010] In order to solve the above technical problems, the present application provides an integrated fixed bed desulfurization, denitrification and dust removal device, which adopts the following technical solutions:

[0011] An integrated fixed bed desulfurization, denitrification and dust removal device comprises a support tank, an exhaust port is provided at the upper end of the support tank, an air intake frame is provided at one side of the support tank, and a dust collector located at the upper end of the air intake frame for removing dust and particulate matter in flue gas is provided in the support tank;

[0012] The dust collector includes a dust hood arranged in a support tank and located at the upper end of an air intake frame, a hydrophobic plate is arranged at the upper end of the dust hood, a partition plate is arranged in the dust hood, the partition plate divides the dust hood into a dust collecting chamber and a dust removing chamber, and a plurality of U-shaped tubes are passed through the partition plate.

[0013] Preferably, the dust collector further comprises a wind shield plate arranged in the support tank and located at the lower side of the dust cover, and the wind shield plate is provided with a wind collecting funnel corresponding to the U-shaped tube one by one;

[0014] One end of the U-shaped tube passes through the lower end of the dust cover and is connected to the air collecting funnel, and the U-shaped end of the U-shaped tube passes through the upper end of the hydrophobic plate, and the other end of the U-shaped tube passes through the partition plate and extends into the dust collecting chamber.

[0015] Preferably, the partition plate is provided with a plurality of detachable hydrophobic plugs.

[0016] Preferably, the support tank is provided with a dust discharge frame connected to the dust collecting chamber, a dust discharge cover is slidably provided in the dust discharge frame, and an adjusting screw threadedly connected to the dust discharge cover is rotatably provided on the dust discharge frame;

[0017] A dust discharge port is provided at the lower end of the dust discharge cover.

[0018] Preferably, a desulfurizer is provided in the support tank;

[0019] The desulfurizer comprises a desulfurization support plate arranged in the support tank and located above the hydrophobic plate, wherein a plurality of connecting holes are opened on the desulfurization support plate, and an exhaust fan is arranged in the connecting holes;

[0020] A hollow cavity is constructed in the desulfurization support plate, a water inlet pipe connected to the cavity is penetrated through the support tank, and a plurality of nozzles connected to the cavity are arranged at the lower end of the desulfurization support plate.

[0021] Preferably, a desulfurization chamber is formed between the wind shield plate and the dust removal hood, a connecting pipe is provided on the hydrophobic plate, and one end of the connecting pipe passes through the partition plate and the dust removal hood and is connected with the desulfurization chamber.

[0022] Preferably, the wind shield is provided with a plurality of nozzles connected with the desulfurization chamber.

[0023] Preferably, a recovery pipe is connected to the lower end of the support tank, and a guiding slope inclined toward the recovery pipe is provided at the bottom of the support tank.

[0024] Preferably, a denitrifier is provided in the support tank;

[0025] The denitrifier comprises a denitrification cylinder arranged in a support tank and located above a denitrification support plate, and both ends of the denitrification cylinder are provided with upwardly protruding conical surfaces;

[0026] A plurality of vent holes are provided on the denitration cylinder.

[0027] Preferably, a water collecting ring is provided in the support tank and is located at the lower end of the denitrification cylinder, and a drainage pipe connected to the water collecting ring is passed through the support tank.

[0028] In summary, the present application includes at least one of the following beneficial technical effects:

[0029] 1. The desulfurizer sprayed by the present invention will react to the flue gas just entering the support tank, wash away part of the dust and particulate matter in the smoke, and preliminarily reduce the temperature of the smoke to reduce the dust removal pressure of the dust collecting chamber and the dust removal chamber; by circulating the desulfurizer in the desulfurization chamber, not only the use efficiency of the desulfurizer is improved, but also the consumption of the desulfurizer is reduced.

[0030] 2. The flue gas after electrostatic dust removal in the present invention will pass through the hydrophobic plug and enter the dust removal chamber to contact the adsorption liquid. The adsorption liquid in the dust removal chamber can further remove the harmful gases remaining in the flue gas to achieve deep purification. Different types of adsorption liquids can also be selected as needed to adapt to different types of pollutants.

[0031] At the same time, the middle section of the U-shaped tube is immersed in the adsorption liquid, which can cool the U-shaped tube and the flue gas flowing through the U-shaped tube. At lower temperatures, the solubility of certain gases will increase, thereby improving the adsorption effect. At the same time, the cooling effect of the adsorption liquid can protect the U-shaped tube from thermal stress damage caused by high-temperature flue gas, reducing the risk of thermal expansion and thermal fatigue.

[0032] 3. In the present invention, when the particles adsorbed in the dust collecting chamber accumulate to a certain level and need to be cleaned, the dust discharge port opened at the lower end of the dust cover is moved to the outside of the dust discharge frame by rotating the adjusting screw rotatably arranged on the dust discharge frame; then, by pumping gas into the air intake frame, the gas will pass through the air collecting funnel and enter the U-shaped tube from the air intake end, and then pass through the U-shaped tube and enter the dust collecting chamber from the air outlet end, and then enter the dust cover from the dust discharge frame and be blown out from the dust discharge port. In this process, the gas will bring out the particles adsorbed in the dust collecting chamber, thereby cleaning the dust collecting chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of the present invention.

[0034] Figure 2 It is a three-dimensional cross-sectional view of the present invention.

[0035] Figure 3 It is a schematic structural diagram of the dust collector of the present invention.

[0036] Figure 4 The present invention Figure 3 A partial enlarged view of point A.

[0037] Figure 5 It is a bottom view between the dust exhaust frame and the dust exhaust cover of the present invention.

[0038] Figure 6 It is a schematic diagram of the structure of the desulfurizer of the present invention.

[0039] Figure 7 It is a cross-sectional view of the desulfurizer of the present invention.

[0040] Figure 8 It is a schematic structural diagram of the denitrifier of the present invention.

[0041] Explanation of reference numerals: 1. support tank; 11. exhaust port; 2. air inlet frame; 3. dust collector; 31. dust hood; 32. water-repellent plate; 33. partition plate; 34. dust collecting chamber; 35. dust collecting chamber; 36. U-shaped tube; 361. air inlet end; 362. air outlet end; 37. wind shield; 38. air collecting funnel; 39. water-repellent plug; 4. dust exhaust frame; 41. adjusting screw; 42. dust exhaust hood ; 43. Dust outlet; 5. Desulfurizer; 51. Desulfurization support plate; 511. Connecting hole; 512. Cavity; 52. Exhaust fan; 53. Water inlet pipe; 54. Nozzle; 55. Desulfurization chamber; 56. Connecting pipe; 57. Nozzle; 58. Recovery pipe; 59. Guide slope; 6. Denitrifier; 61. Denitrification cylinder; 62. Conical surface; 63. Vent; 64. Water collecting ring; 65. Drain pipe. DETAILED DESCRIPTION

[0042] The following is combined with Figures 1 to 8 This application is described in further detail.

[0043] The embodiment of the present application discloses an integrated fixed-bed desulfurization, denitrification and dust removal device, which reduces the dust removal pressure by washing away a portion of the dust and particulate matter in the smoke and preliminarily lowering the temperature of the smoke. By recycling the desulfurizer, not only the use efficiency of the desulfurizer is improved, but also the consumption of the desulfurizer is reduced.

[0044] Example:

[0045] Reference Figure 1 and Figure 2 As shown, an integrated fixed bed desulfurization, denitrification and dust removal device comprises a support tank 1 , an exhaust port 11 is opened at the upper end of the support tank 1 , and a dust collector 3 is arranged in the support tank 1 .

[0046] During the fixed bed desulfurization and denitrification process, the flue gas is first input into the support tank 1 through the air intake frame 2 provided on one side of the support tank 1. After entering the support tank 1, the flue gas will upwardly pass through the dust collector 3 located at the upper end of the air intake frame 2. The dust collector 3 removes dust and particulate matter in the flue gas, collects the dust and particulate matter and discharges them, thereby reducing the load of desulfurization and denitrification and protecting the desulfurization and denitrification materials from being contaminated by particulate matter.

[0047] The flue gas that has been treated with dust removal continues to flow upward and enters the desulfurizer 5 and the denitrifier 6 arranged in the support tank 1 for desulfurization. The sulfur dioxide (SO2) and nitrogen oxides (NOx) in the flue gas react chemically with the desulfurizer and the desulfurizer to be converted into harmless or low-harmful substances. The flue gas that has been treated with desulfurization and denitrification is discharged through the exhaust port 11 at the upper end of the support tank 1. At this time, the harmful components in the flue gas have been effectively removed, meeting the environmental protection emission standards.

[0048] Reference Figure 3 and Figure 4As shown, specifically, the dust collector 3 includes a dust hood 31 arranged in the support tank 1 and located at the upper end of the air intake frame 2, a hydrophobic plate 32 is arranged at the upper end of the dust hood 31, a partition plate 33 is arranged in the dust hood 31, the partition plate 33 divides the dust hood 31 into a dust collecting chamber 34 and a dust removing chamber 35, a plurality of U-shaped tubes 36 are passed through the partition plate 33, a wind shield plate 37 located at the lower side of the dust hood 31 is arranged in the support tank 1, and an air collecting funnel 38 corresponding to the U-shaped tube 36 is arranged on the wind shield plate 37.

[0049] After the smoke is input into the support tank 1, the smoke will be blocked by the wind shield 37 and gathered towards the wind collecting funnel 38 arranged on the wind shield 37. The wind collecting funnel 38 corresponds to the U-shaped tube 36 one by one. Since one end of the U-shaped tube 36 passes through the lower end of the dust removal cover 31 and is connected to the wind collecting funnel 38, the other end of the U-shaped tube 36 passes through the partition plate 33 and extends into the dust collecting chamber 34.

[0050] The flue gas will enter from one end of the U-shaped tube 36 through the wind collecting funnel 38, then pass through the U-shaped tube 36, and enter the dust collecting chamber 34 from the other end of the U-shaped tube 36. A high voltage is applied to the dust collecting chamber 34 based on the principle of electrostatic dust removal to generate a corona discharge phenomenon. The corona discharge will form a high electric field area in the dust collecting chamber 34. When the particles in the flue gas pass through the corona discharge area, they will collide with the ions in the electric field and acquire electric charges, becoming charged particles. Under the action of the electric field force, the charged particles are attracted and deposited in the positively charged dust collecting chamber 34, thereby effectively removing the particles in the flue gas.

[0051] For ease of understanding, the end of the U-shaped tube 36 connected to the air collecting funnel 38 is defined as the air inlet end 361, and the end of the U-shaped tube 36 extending into the dust collecting chamber 34 is defined as the air outlet end 362; the smoke will enter the U-shaped tube 36 from the air inlet end 361 through the air collecting funnel 38, and then pass through the U-shaped tube 36 and enter the dust collecting chamber 34 from the air outlet end 362.

[0052] Adsorption liquid is injected into the dust removal chamber 35, and several hydrophobic plugs 39 are provided on the partition plate 33 to prevent the adsorption liquid from entering the dust collecting chamber 34, while allowing the flue gas in the dust collecting chamber 34 to enter the dust removal chamber 35 through the hydrophobic plugs 39; since the hydrophobic plugs 39 are detachable, they can be flexibly handled according to actual operating conditions and maintenance requirements. For example, the hydrophobic plugs 39 can be easily removed when cleaning or replacement is required.

[0053] The flue gas that has passed through the electrostatic dust removal will pass through the hydrophobic plug 39 and enter the dust removal chamber 35 to come into contact with the adsorption liquid. The adsorption liquid in the dust removal chamber 35 can further remove the harmful gases remaining in the flue gas to achieve deep purification. Different types of adsorption liquids can also be selected as needed to adapt to different types of pollutants.

[0054] Among them, the U-shaped end of the U-shaped tube 36 passes through the upper end of the hydrophobic plate 32, that is, the middle section of the U-shaped tube 36 is immersed in the adsorption liquid. The adsorption liquid can cool the U-shaped tube 36 and cool the flue gas flowing through the U-shaped tube 36. At a lower temperature, the solubility of certain gases will increase, thereby improving the adsorption effect. At the same time, through the cooling effect of the adsorption liquid, the U-shaped tube 36 can be protected from thermal stress damage caused by high-temperature flue gas, reducing the risk of thermal expansion and thermal fatigue.

[0055] The flue gas treated with the adsorbent will pass through the hydrophobic plate 32, which can prevent the adsorbent from being in the dust removal chamber 35 and allow the flue gas to continue to flow upward through the hydrophobic plate 32 and enter the desulfurizer 5 and the denitrifier 6 arranged in the support tank 1 for desulfurization. The sulfur dioxide (SO2) and nitrogen oxides (NOx) in the flue gas react chemically with the desulfurizer and the desulfurizer to be converted into harmless or low-harmful substances. The flue gas treated with desulfurization and denitrification is discharged through the exhaust port 11 at the upper end of the support tank 1.

[0056] Reference Figure 3 , Figure 4 and Figure 5 As shown, a dust exhaust frame 4 communicating with the dust collecting chamber 34 is provided on the support tank 1 , and a dust exhaust cover 42 is slidably provided in the dust exhaust frame 4 .

[0057] When the adsorbed particles in the dust collecting chamber 34 accumulate to a certain level and need to be cleaned, the adjusting screw 41 rotatably arranged on the dust exhaust frame 4 is rotated. The adjusting screw 41 will be threadedly connected with the dust exhaust cover 42, forcing the dust exhaust cover 42 to move outside the dust exhaust frame 4, and the dust exhaust port 43 opened at the lower end of the dust exhaust cover 42 is moved outside the dust exhaust frame 4.

[0058] Then, by pumping gas into the air intake frame 2, the gas will enter the U-shaped tube 36 from the air intake end 361 through the air collecting funnel 38, and then pass through the U-shaped tube 36 to enter the dust collecting chamber 34 from the air outlet end 362, and then enter the dust exhaust hood 42 from the dust exhaust frame 4, and be blown out from the dust exhaust port 43. During this process, the gas will bring out the particles adsorbed in the dust collecting chamber 34, thereby cleaning the dust collecting chamber 34.

[0059] After the dust collecting chamber 34 is cleaned, the adjusting screw 41 is rotated to drive the dust cover 42 to move into the dust exhaust frame 4 through the threaded connection, and the dust exhaust port 43 is retracted into the dust exhaust frame 4 to restore to the initial state, so that the dust collecting chamber 34 is resealed to prevent smoke leakage.

[0060] It should be noted that the hydrophobic plate 32 and the hydrophobic plug 39 are a material or structure with hydrophobic properties, which can prevent water or liquid from passing through, but allow gas to pass through. The hydrophobic plate 32 and the hydrophobic plug 39 use the hydrophobic properties of their surfaces to make water droplets form beads on the plate, which are easy to roll down, thereby preventing water penetration. The pore structure of the hydrophobic plate 32 and the hydrophobic plug 39 allows gas to pass through, but has a greater resistance to water.

[0061] Reference Figure 6 and Figure 7 As shown, specifically, the desulfurizer 5 includes a desulfurization support plate 51 disposed in the support tank 1 and located above the hydrophobic plate 32 . A plurality of connecting holes 511 are provided on the desulfurization support plate 51 . A hollow cavity 512 is constructed in the desulfurization support plate 51 .

[0062] When the flue gas treated with the adsorption liquid continues to flow upward through the hydrophobic plate 32, the exhaust fan 52 arranged in the connecting hole 511 will transport the flue gas upward; at the same time, the desulfurizer is transported into the cavity 512 connected to it through the water inlet pipe 53 passed through the support tank 1, and then sprayed out through a plurality of nozzles 54 connected to the cavity 512 arranged at the lower end of the desulfurization support plate 51. The sprayed desulfurizer will be fully mixed with the flue gas flowing upward, and the desulfurizer will react with the sulfide (mainly sulfur dioxide SO2) in the flue gas to convert it into harmless or low-harmful compounds, thereby achieving the best desulfurization effect.

[0063] A desulfurization chamber 55 is formed between the wind shield plate 37 and the dust removal cover 31 , and a connecting pipe 56 is provided on the hydrophobic plate 32 . One end of the connecting pipe 56 passes through the partition plate 33 and the dust removal cover 31 and is connected to the desulfurization chamber 55 .

[0064] The desulfurizer desulfurized by the nozzle 54 will fall on the hydrophobic plate 32. Due to the characteristics of the hydrophobic plate 32, the desulfurizer cannot pass through the hydrophobic plate 32 to enter the dust removal chamber 35, but will converge to the connecting pipe 56 penetrated by the hydrophobic plate 32. The desulfurizer desulfurized will enter the desulfurization chamber 55 through the connecting pipe 56, and then be sprayed out again through a plurality of nozzles 57 arranged on the wind shield plate 37 and connected to the desulfurization chamber 55. The sprayed desulfurizer will react to the flue gas just entering the support tank 1, and wash away part of the dust and particulate matter in the flue gas, and preliminarily reduce the temperature of the flue gas to reduce the dust removal pressure of the dust collecting chamber 34 and the dust removal chamber 35. By recycling the desulfurizer in the desulfurization chamber 55, not only the use efficiency of the desulfurizer is improved, but also the consumption of the desulfurizer is reduced.

[0065] Afterwards, these desulfurizers will pass through the guide slope 59 set at the bottom of the support tank 1 and converge to the recovery pipe 58 connected to the lower end of the support tank 1. The guide slope 59 is inclined toward the recovery pipe 58, and the desulfurizer is discharged from the support tank 1 through the recovery pipe 58 for treatment.

[0066] Reference Figure 8 As shown, specifically, the denitrifier 6 includes a denitrification cylinder 61 disposed in the support tank 1 and located above the denitrification support plate. Both ends of the denitrification cylinder 61 are provided with upwardly protruding conical surfaces 62, and the denitrification cylinder 61 is filled with a denitrification agent.

[0067] The desulfurized flue gas will be transported by the exhaust fan 52, through a plurality of vents 63 provided on the denitrification tube 61, and discharged from the exhaust port 11 through the denitrification tube 61. During this process, the nitrogen oxides in the flue gas will chemically react with the denitrification agent filled in the denitrification tube 61, and be converted into harmless or low-harmful compounds, such as nitrogen (N2) and water (H2O), among which the nitrogen will be discharged from the exhaust port.

[0068] The generated water will flow around along the conical surface 62, then gather at the outer circle of the conical surface 62, fall into the water collecting ring 64 located at the lower end of the denitrification cylinder 61 arranged in the support tank 1, and then be discharged from the drainage pipe 65 connected to the water collecting ring 64 which is passed through the support tank 1.

[0069] The implementation principle of the present invention is:

[0070] (1): During the fixed bed desulfurization and denitrification process, the flue gas is first input into the support tank 1 through the air intake frame 2 arranged on one side of the support tank 1. The flue gas will flow upward after entering the support tank 1. The flue gas will be blocked by the wind shield 37 and converge to the air collecting funnel 38 arranged on the wind shield 37. The flue gas will enter the U-shaped tube 36 from the air intake end 361 through the air collecting funnel 38, and then pass through the U-shaped tube 36 and enter the dust collecting chamber 34 from the air outlet end 362.

[0071] (2): Based on the principle of electrostatic dust removal, a high voltage is applied in the dust collecting chamber 34 to generate a corona discharge phenomenon. The corona discharge will form a high electric field area in the dust collecting chamber 34. When the particles in the flue gas pass through the corona discharge area, they will collide with the ions in the electric field and acquire electric charge, becoming charged particles. Under the action of the electric field force, the charged particles are attracted and deposited in the positively charged dust collecting chamber 34, thereby effectively removing the particles in the flue gas.

[0072] (3): After the electrostatic dust removal, the flue gas will pass through the hydrophobic plug 39 and enter the dust removal chamber 35 to contact the adsorption liquid. The adsorption liquid in the dust removal chamber 35 can further remove the harmful gases remaining in the flue gas to achieve deep purification. Different types of adsorption liquids can also be selected as needed to adapt to different types of pollutants.

[0073] (4): At the same time, the middle section of the U-shaped tube 36 is immersed in the adsorption liquid. The adsorption liquid can cool the U-shaped tube 36 and the flue gas flowing through the U-shaped tube 36. At a lower temperature, the solubility of certain gases will increase, thereby improving the adsorption effect. At the same time, the cooling effect of the adsorption liquid can protect the U-shaped tube 36 from thermal stress damage caused by high-temperature flue gas, reducing the risk of thermal expansion and thermal fatigue.

[0074] (5): The flue gas treated with the adsorption liquid will pass through the hydrophobic plate 32. The hydrophobic plate 32 can prevent the adsorption liquid from being in the dust removal chamber 35 and allow the flue gas to continue to flow upward through the hydrophobic plate 32. The exhaust fan 52 will transport the flue gas upward. At the same time, the desulfurizer will be transported into the cavity 512 connected to it through the water inlet pipe 53, and then sprayed out through the nozzle 54. The sprayed desulfurizer will be fully mixed with the flue gas flowing upward. The desulfurizer will react with the sulfide (mainly sulfur dioxide SO2) in the flue gas and convert it into harmless or low-harmful compounds, thereby achieving the best desulfurization effect.

[0075] (6): The desulfurizing agent desulfurized by the nozzle 54 will fall on the hydrophobic plate 32, enter the desulfurization chamber 55 through the connecting pipe 56, and then be sprayed out again through a plurality of nozzles 57 arranged on the wind shield plate 37 and connected to the desulfurization chamber 55. The sprayed desulfurizing agent will react to the flue gas just entering the support tank 1, wash away part of the dust and particulate matter in the flue gas, and preliminarily reduce the temperature of the flue gas to reduce the dust removal pressure of the dust collecting chamber 34 and the dust removal chamber 35.

[0076] (7): Afterwards, the desulfurizers will pass through the guide slope 59 provided at the bottom of the support tank 1 and converge toward the recovery pipe 58 connected to the lower end of the support tank 1. The guide slope 59 is inclined toward the recovery pipe 58, and the desulfurizers are discharged from the support tank 1 through the recovery pipe 58 for treatment.

[0077] (8): The desulfurized flue gas is transported by the exhaust fan 52 and discharged from the exhaust port 11 through the denitrification tube 61 through a plurality of vent holes 63 provided on the denitrification tube 61. During this process, the nitrogen oxides in the flue gas react chemically with the denitrification agent filled in the denitrification tube 61 and are converted into harmless or low-harmful compounds, such as nitrogen (N2) and water (H2O). The nitrogen in the flue gas is discharged from the exhaust port.

[0078] (9): When the particles adsorbed in the dust collecting chamber 34 accumulate to a certain level and need to be cleaned, the dust outlet 43 opened at the lower end of the dust cover 42 is moved to the outside of the dust collecting frame 4 by rotating the adjusting screw 41 rotatably arranged on the dust collecting frame 4; then, by pumping gas into the air intake frame 2, the gas will pass through the air collecting funnel 38 and enter the U-shaped tube 36 from the air intake end 361, and then pass through the U-shaped tube 36 and enter the dust collecting chamber 34 from the air outlet end 362, and then enter the dust collecting chamber 34 from the dust collecting frame 4 into the dust cover 42, and be blown out from the dust outlet 43. In this process, the gas will bring out the particles adsorbed in the dust collecting chamber 34, thereby cleaning the dust collecting chamber 34.

[0079] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, all equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An integrated fixed bed desulfurization, denitrification and dust removal device, comprising a support tank (1), wherein an exhaust port (11) is provided at the upper end of the support tank (1), and characterized in that: An air intake frame (2) is arranged on one side of the support tank (1), and a dust collector (3) located at the upper end of the air intake frame (2) and used for removing dust and particulate matter in the flue gas is arranged inside the support tank (1); The dust collector (3) comprises a dust cover (31) arranged in a support tank (1) and located at the upper end of an air intake frame (2); a hydrophobic plate (32) is arranged at the upper end of the dust cover (31); a partition plate (33) is arranged in the dust cover (31); the partition plate (33) divides the dust cover (31) into a dust collecting chamber (34) and a dust removal chamber (35); and a plurality of U-shaped tubes (36) are passed through the partition plate (33); The dust collector (3) further comprises a wind shield (37) arranged in the support tank (1) and located at the lower side of the dust cover (31), wherein the wind shield (37) is provided with a wind collecting funnel (38) corresponding one-to-one to the U-shaped tube (36); One end of the U-shaped tube (36) penetrates the lower end of the dust removal cover (31) and is connected to the air collecting funnel (38), and the U-shaped end of the U-shaped tube (36) penetrates the upper end of the hydrophobic plate (32), and the other end of the U-shaped tube (36) penetrates the partition plate (33) and then extends into the dust collecting chamber (34); The partition plate (33) is provided with a plurality of detachable drain plugs (39); A desulfurizer (5) is arranged in the support tank (1); The desulfurizer (5) comprises a desulfurization support plate (51) arranged in the support tank (1) and located above the hydrophobic plate (32); a plurality of communication holes (511) are provided on the desulfurization support plate (51); and an exhaust fan (52) is provided in the communication hole (511); The desulfurization support plate (51) is provided with a hollow cavity (512), the support tank (1) is provided with a water inlet pipe (53) connected to the cavity (512), and the lower end of the desulfurization support plate (51) is provided with a plurality of nozzles (54) connected to the cavity (512); A desulfurization chamber (55) is formed between the wind shield (37) and the dust cover (31); a connecting pipe (56) is provided on the hydrophobic plate (32); one end of the connecting pipe (56) passes through the partition plate (33) and the dust cover (31) and is connected to the desulfurization chamber (55); The wind shield (37) is provided with a plurality of nozzles (57) which are in communication with the desulfurization chamber (55).

2. The integrated fixed bed desulfurization, denitrification and dust removal device according to claim 1 is characterized in that: The support tank (1) is provided with a dust discharge frame (4) in communication with the dust collecting chamber (34); a dust discharge cover (42) is slidably provided in the dust discharge frame (4); and an adjusting screw (41) threadably connected to the dust discharge cover (42) is rotatably provided on the dust discharge frame (4); A dust exhaust port (43) is provided at the lower end of the dust exhaust cover (42).

3. The integrated fixed bed desulfurization, denitrification and dust removal device according to claim 1 is characterized in that: The lower end of the support tank (1) is connected to a recovery pipe (58), and the bottom of the support tank (1) is provided with a guide slope (59) inclined towards the recovery pipe (58).

4. The integrated fixed bed desulfurization, denitrification and dust removal device according to claim 1 is characterized in that: A denitrifier (6) is arranged in the support tank (1); The denitrifier (6) comprises a denitrification cylinder (61) arranged in the support tank (1) and located above the denitrification support plate, and both ends of the denitrification cylinder (61) are provided with upwardly protruding conical surfaces (62); The denitration cylinder (61) is provided with a plurality of ventilation holes (63).

5. The integrated fixed bed desulfurization, denitrification and dust removal device according to claim 4 is characterized in that: A water collecting ring (64) located at the lower end of the denitration cylinder (61) is arranged in the support tank (1), and a drainage pipe (65) connected to the water collecting ring (64) is passed through the support tank (1).

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