Atomization spraying semi-dry method denitration and desulfurization device and treatment method

Abstract

The invention relates to the technical field of semi-dry denitration and desulfurization devices, in particular to an atomizing and spraying semi-dry denitration and desulfurization device and a treatment method.The atomizing and spraying semi-dry denitration and desulfurization device comprises an SDA denitration and desulfurization reaction tower, the lower end of the SDA denitration and desulfurization reaction tower is communicated with a public scraper conveyor, and the side end of the SDA denitration and desulfurization reaction tower is communicated with a bag-type dust collector through a butt joint structure; the lower end of the bag-type dust collector is communicated with the public scraper conveyer through a bag-type scraper conveyer; the atomizer is arranged at the top of the flue gas distributor and used for smashing lime slurry into fog drops with the diameter being smaller than 30 micrometers so as to greatly increase the specific surface area of the lime slurry, meanwhile, the fog drops can suspend in the flue gas, the contact area of acid gas molecules in the flue gas and calcium hydroxide molecules in the lime slurry is increased, and the contact time of the acid gas molecules in the flue gas and the calcium hydroxide molecules in the lime slurry is prolonged. The reaction efficiency is high, moisture in the lime slurry is evaporated by the waste heat of the flue gas, and the product of the acid gas and the lime slurry is dust particles, so that the denitration and desulfurization treatment work is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of semi-dry denitration and desulfurization devices, and specifically to an atomized spray semi-dry denitration and desulfurization device and a treatment method thereof. Background Technique

[0002] The spray drying method for flue gas denitration and desulfurization is a denitration and desulfurization process in which flue gas reacts with lime slurry sprayed into a mist in a drying absorption tower. This method belongs to the semi-dry denitration and desulfurization process. Since the added absorbent is in a wet state and the denitration and desulfurization products are in a dry state, it is called the semi-dry method. When the calcium-sulfur molar ratio is 1.2 - 1.5, the denitration and desulfurization rate can reach 75% - 85%. The denitration and desulfurization products are mixtures such as CaSO4, CaSO3, Ca(NO3)2, unreacted Ca(OH)2, and fly ash. This method is suitable for treating flue gas from low- and medium-sulfur coals. The advantages of this method are that the system is simple, the operation is reliable, the investment is low, the energy consumption is small, the denitration and desulfurization products are in a dry powder state, and there is no wastewater discharge. The disadvantages are that lime instead of limestone is used as the absorbent, the inner wall of the drying absorption tower is prone to scaling, the atomization device is prone to wear or blockage, and it is difficult to utilize the denitration and desulfurization ash residue.

[0003] SO2 in the flue gas reacts with atomized Ca(OH)2 slurry droplets to form CaSO4 and CaSO3. In addition, the purpose of injecting ozone is to oxidize the difficult-to-absorb NO into the easily-absorbable N2O5, and then react with Ca(OH)2 droplets to form Ca(NO3)2. The specific reaction equations are as follows: NO + O3 = NO2 + O2 2NO2 +O3= N2O5 + O2 Ca(OH)2 + SO2 = CaSO3 + H2O 2CaSO3 + O2 = 2CaSO4 N2O5+H2O = 2HNO3 Ca(OH)2 +2HNO3 = Ca(NO3)2+H2O; According to Chinese patent publication number CN105107366B, a downstream spray semi-dry flue gas desulfurization method is disclosed, which is to first mix the flue gas to be treated with powdered undigested desulfurizer, and then spray it with atomized water to make the atomized water, flue gas and desulfurizer fully contact, increase the contact surface area of ​​the three phases of gas, liquid and solid, so that the desulfurizer can be digested, and the desulfurization reaction is completed. The flue gas after desulfurization is discharged after dust removal and purification. This method centrally controls the desulfurizer digestion, flue gas cooling, and desulfurization reaction in the same reaction zone of the desulfurization device, improves the desulfurization efficiency, and shortens the desulfurization process. The method has a wide range of applications and is highly adaptable to changes in flue gas flow, SO2 concentration, and temperature. Compared with wet desulfurization, there is no system corrosion, no fog, tailing, blue smoke and other phenomena in chimney emissions, no gypsum rain, no secondary pollution of wastewater, high system stability, and strong adaptability. At the same time, compared with the conventional circulating fluidized bed semi-dry method and dense phase coherent tower semi-dry method, it has a short process, low energy consumption and low investment.

[0004] At present, the existing atomizing spray semi-dry desulfurization device and the above-mentioned case are not convenient for efficient spraying operation when in use, and there will be the problem of dry lime powder accumulation, which affects the treatment effect. Therefore, improvements are made to the above-mentioned problems. Summary of the invention

[0005] In view of the problems in the prior art, the present invention provides an atomization spray semi-dry denitration and desulfurization device and a treatment method.

[0006] The technical solution adopted by the present invention to solve the technical problem is: an atomized spray semi-dry denitration and desulfurization device and a treatment method, comprising an SDA denitration and desulfurization reaction tower, the lower end of the SDA denitration and desulfurization reaction tower is connected to a public scraper conveyor, the side end of the SDA denitration and desulfurization reaction tower is connected to a bag dust collector through a docking structure, and the lower end of the bag dust collector is connected to the public scraper conveyor through the bag scraper conveyor; SDA denitration and desulfurization reaction tower is used for denitration and desulfurization treatment. The SDA denitration and desulfurization reaction tower is connected through a flue gas distributor and an atomizer to perform cyclone denitration and desulfurization treatment. The flue gas distributor adopts spiral distribution to evenly introduce exhaust gas. The atomizer is arranged on the top of the flue gas distributor. Its function is to crush the lime slurry into droplets with a diameter of less than 30 microns (instead of atomized water sprayed like CN105107366B) to greatly increase the specific surface area of ​​the lime slurry. At the same time, the droplets can be suspended in the flue gas, increasing the contact area and contact time between the acidic gas molecules in the flue gas and the calcium hydroxide molecules in the lime slurry. It has a higher reaction efficiency. The waste heat of the flue gas evaporates the water in the lime slurry. The product of the acidic gas and the lime slurry is dust particles. The flue gas outlet of the treatment chamber is located at the ash hopper at the bottom of the tower. When the flue gas is discharged from the treatment chamber, due to the change in flow direction and the action of centrifugal force, part of the dust separates from the flue gas and falls into the ash hopper; Docking structure, used for the docking of the SDA denitration and desulfurization reaction tower and the bag filter, and for secondary denitration and desulfurization treatment. The denitration and desulfurization treatment components in the docking structure are designed with a rotating structure to evenly introduce lime treatment material. A conical sleeve is provided on the first mating gear disk to restrict the flow environment. The guide and discharge inner ring in the first communication treatment unit rotates and sprays materials through the drive of the second mating gear disk, the docking shaft, and the rotating mating disk.

[0007] Specifically, the SDA denitration and desulfurization reaction tower includes an enclosed chamber. A flue gas distributor is provided at the lower end of the enclosed chamber, and an atomizer is provided at the center of the flue gas distributor. The lower ends of the flue gas distributor and the atomizer are connected to the treatment chamber, and a connecting docking pipe is provided at the side end of the treatment chamber. A tower bottom scraper conveyor is installed at the bottom of the treatment chamber. The flue gas from the outlet of the solid waste furnace enters the treatment chamber from the top flue gas distributor and rotates turbulently in the SDA denitration and desulfurization reaction tower through the guide vanes in the distributor at the top inlet of the tower. Lime slurry is sprayed into the flue gas to undergo a neutralization reaction with the acidic substances in the flue gas to remove the acidic substances. However, the flue gas containing a large amount of dust is introduced into the bag filter from the lower part of the treatment chamber through the docking structure. At the same time, a docking structure is provided between the outlet of the SDA denitration and desulfurization reaction tower and the inlet of the bag filter, which can spray hydrated lime powder to absorb the acidic gas in the flue gas and is put into use when the SDA semi-dry method system fails or is under maintenance to ensure that the pollutant emissions meet the standards.

[0008] Specifically, the flue gas distributor includes a duct. A docking guide and discharge pipe orifice is provided at the top of the duct, and a first ozone injector, a second ozone injector, a first connecting pipe, and a second connecting pipe are provided on the duct. The first connecting pipe and the second connecting pipe introduce dilution air gas for ozone denitration and accelerating the circulation.

[0009] Specifically, the docking structure includes a protective shell and denitration and desulfurization treatment components. The denitration and desulfurization treatment components are limitedly arranged in the protective shell. The denitration and desulfurization treatment components are used for denitration and desulfurization treatment, and the protective shell is used for the docking connection of the docking pipe.

[0010] Specifically, the denitration and desulfurization treatment components include a mounting frame. A control motor is installed at the side end of the mounting frame. The control motor drives a second gear disk and a first gear disk through a driving rod. The size of the second gear disk is three-quarters of that of the first gear disk. The first gear disk and the second gear disk are meshed with the deacidification treatment mechanism to control the rotation of the deacidification treatment mechanism. An external sleeve is sleeved on the outer wall of the deacidification treatment mechanism. The side end of the deacidification treatment mechanism is fixed to the docking conduit. The docking conduit is hermetically fixed to the protective shell. The deacidification treatment mechanism is rotatably arranged on the external sleeve.

[0011] Specifically, the deacidification treatment mechanism includes a first communication treatment unit and a second communication treatment unit. The first communication treatment unit and the second communication treatment unit are arranged on both sides of the first mating gear disk and the conical sleeve, and the first mating gear disk is fixedly communicated with the conical sleeve. The center of the first mating gear disk is a hollow structure.

[0012] Specifically, the first communication treatment unit includes a pressurization and drainage seat. The pressurization and drainage seat is communicated with a spraying ring through a communication drainage pipe. The inner wall of the spraying ring is communicated with a drainage inner ring, and the drainage inner ring can rotate within the spraying ring for the dispersion treatment of lime material. A second mating gear disk is rotatably arranged at the side end of the spraying ring. The second mating gear disk is fixed to the drainage inner ring through a docking shaft, and the side end of the docking shaft is also fixed to a rotating mating disk. Through the structural setting of the docking structure, the protective shell within the docking structure is used for the communication between the SDA denitration and desulfurization reaction tower and the bag filter, and the control motor performs differential driving through the second gear disk and the first gear disk, so that the second mating gear disk and the first mating gear disk rotate differentially. When the waste gas is drained through the middle of the first mating gear disk and the conical sleeve, the second mating gear disk drives the drainage inner ring to rotate through the docking shaft and the rotating mating disk for rotary spraying, so that the lime powder is evenly sprayed. Moreover, the conical structure of the conical sleeve prevents blockage, enabling the gas to carry the lime powder to be evenly drained and transmitted.

[0013] Specifically, the atomizer includes a sling. A main motor is arranged at the lower end of the sling. The main motor is drivingly connected to a gear speed increaser at the lower end. The gear speed increaser is communicated with an outer conical barrel through a flange. An atomizing disk is arranged at the bottom of the outer conical barrel. An electric control box is arranged at the side end of the main motor. An oil pump is installed at the front end of the electric control box. The oil pump and the main motor cooperate for atomization treatment. Through the setting of the atomizer, the electric control box can control the oil pump and the main motor to work, and the main motor can be controlled through the gear speed increaser. Thus, through the gear speed increaser, the centrifugal principle can be utilized for atomization treatment work. The bottom scraper conveyor and the bag scraper conveyor at the bottom of the SDA denitration and desulfurization reaction tower are both communicated with a common scraper conveyor, facilitating the drainage treatment of waste residue. And after the SDA denitration and desulfurization reaction tower is treated, secondary treatment can be carried out through the docking structure. The docking structure can also be used as an alternative solution to perform deacidification treatment when the SDA denitration and desulfurization reaction tower cannot operate normally. Finally, the waste gas can reach the bag filter for the third treatment process to ensure the denitration and desulfurization treatment capacity.

[0014] Specifically, the second mating gear disk, the rotating mating disk, and the drainage inner ring rotate on the conical sleeve, and there is a rotational speed difference between the second mating gear disk, the rotating mating disk, and the drainage inner ring and the first mating gear disk and the conical sleeve.

[0015] Specifically, a groove adapted to the second gear disk is opened on the external sleeve. The protective shell is fixedly connected to the mounting frame, and the conical sleeve has a conical structure, enabling the waste gas to carry the lime material to be drained without obstruction.

[0016] Advantages of the present invention: First, when the present invention is in use, the flue gas from the outlet of the solid waste furnace enters the treatment chamber from the top flue gas distributor. Through the guide vanes in the distributor at the top inlet of the tower, the flue gas rotates and turbulently flows in the SDA denitration and desulfurization reaction tower. Lime slurry is sprayed into the flue gas to react with the acidic substances in the flue gas to remove the acidic substances. However, the flue gas containing a large amount of dust is introduced into the bag filter from the lower part of the treatment chamber through the docking structure. At the same time, a docking structure is arranged between the outlet of the SDA denitration and desulfurization reaction tower and the inlet of the bag filter, and hydrated lime powder can be sprayed to absorb the acidic gas in the flue gas, which is put into use when the SDA semi-dry method system fails or is under maintenance to ensure that the pollutant emissions meet the standards.

[0017] Second, the present invention arranges an atomizer at the top of the flue gas distributor. Its function is to crush the lime slurry into droplets with a diameter of less than 30 microns, so as to greatly increase the specific surface area of the lime slurry. At the same time, the droplets can be suspended in the flue gas, increasing the contact area and contact time between the acidic gas molecules in the flue gas and the calcium hydroxide molecules in the lime slurry, ensuring a relatively high reaction efficiency. The heat of the flue gas evaporates the water in the lime slurry, and the product of the acidic gas and the lime slurry is dust particles. The flue gas outlet of the treatment chamber is located at the ash hopper at the bottom of the tower. When the flue gas is led out from the treatment chamber, due to the change in flow direction and the action of centrifugal force, part of the dust breaks away from the flue gas and falls into the ash hopper.

[0018] Third, through the structural setting of the docking structure, the protective shell inside the docking structure is used for the connection between the SDA denitration and desulfurization reaction tower and the bag filter. And the control motor drives differentially through the second gear disk and the first gear disk, so that the second mating gear disk and the first mating gear disk rotate differentially. When the waste gas is discharged through the middle of the first mating gear disk and the conical sleeve, the second mating gear disk drives the inner ring of the exhaust through the docking shaft and the rotating mating disk to perform rotary spraying, so that the lime powder is evenly sprayed. And the conical structure of the conical sleeve prevents blockage, enabling the gas to carry the lime powder to be evenly discharged and transmitted.

[0019] Fourth, through the setting of the atomizer, the electric control box can control the oil pump and the main motor to work. The main motor can be controlled by the gear speed increaser. Thus, through the gear speed increaser, the centrifugal principle can be utilized to perform the atomization treatment work. The bottom scraper conveyor in the SDA denitration and desulfurization reaction tower and the lower ends of the bag scraper conveyors are both connected to the common scraper conveyor, which is convenient for the discharge treatment of the waste residue. And after the treatment in the SDA denitration and desulfurization reaction tower, secondary treatment can be carried out through the docking structure. The docking structure can also be used as an alternative solution to perform acid removal treatment when the SDA denitration and desulfurization reaction tower cannot operate normally. Finally, the waste gas can reach the bag filter for the third treatment process to ensure the denitration and desulfurization treatment capacity. Brief Description of the Drawings

[0020] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0021] Figure 1 It is a plan view of the main body in the present invention; Figure 2 It is a plan view of the SDA denitration and desulfurization reaction tower in the present invention; Figure 3 It is a plan view of the flue gas distributor in the present invention; Figure 4 It is a perspective three-dimensional structure schematic diagram of the docking structure in the front view in the present invention; Figure 5 It is a three-dimensional structure diagram of the denitration and desulfurization treatment component in the present invention; Figure 6 It is an exploded view of the denitration and desulfurization treatment component in the present invention; Figure 7 It is a three-dimensional structure diagram of the deacidification treatment mechanism in the present invention; Figure 8 It is an exploded view of the deacidification treatment mechanism in the present invention; Figure 9 It is an exploded view of the first communication treatment unit in the present invention; Figure 10 It is a three-dimensional structure diagram of the atomizer in the present invention.

[0022] In the figure: 1 - crane, 2 - SDA denitration and desulfurization reaction tower, 3 - docking structure, 4 - common scraper conveyor, 5 - cloth bag scraper conveyor, 6 - bag filter, 7 - flue gas distributor, 8 - atomizer, 9 - treatment chamber, 10 - communication docking pipe, 11 - bottom scraper conveyor of the tower, 12 - enclosed room, 13 - first ozone injector, (13 - 1) - first communication pipe, 14 - air duct, 15 - second ozone injector, (15 - 1) - second communication pipe, 16 - docking exhaust pipe orifice, 17 - protective shell, 18 - denitration and desulfurization treatment component, 19 - mounting rack, 20 - first gear disk, 22 - second gear disk, 23 - control motor, 24 - docking conduit, 25 - external sleeve, 26 - deacidification treatment mechanism, 27 - driving rod, 28 - first communication treatment unit, 29 - second communication treatment unit, 30 - first mating gear disk, 31 - conical sleeve, 32 - pressurized exhaust seat, 33 - communication exhaust pipe, 34 - spraying ring, 35 - second mating gear disk, 36 - docking shaft, 37 - electric control box, 38 - oil pump, 39 - atomizing disk, 40 - outer conical barrel, 41 - flange, 42 - gear speed increaser, 43 - main motor, 44 - lifting appliance, 45 - rotating mating disk, 46 - exhaust inner ring. Specific embodiments

[0023] To enable those skilled in the art to better understand the solution of this application, the following will clearly and completely describe the technical solution in the embodiments of this application with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts shall fall within the scope of protection of this application.

[0024] The present invention will be further described below with reference to the accompanying drawings. Embodiment

[0025] As Figures 1-10 shown, an atomizing spray semi-dry denitrification and desulfurization device and treatment method of the present invention include an SDA denitrification and desulfurization reaction tower 2. A common scraper conveyor 4 is connected and provided at the lower end of the SDA denitrification and desulfurization reaction tower 2. A bag filter 6 is connected and provided at the side end of the SDA denitrification and desulfurization reaction tower 2 through a docking structure 3. The lower end of the bag filter 6 is connected to the common scraper conveyor 4 through a bag scraper conveyor 5. The flue gas distributor 7 in the SDA denitrification and desulfurization reaction tower 2 can achieve the inlet of flue gas. The flue gas is introduced into the air duct 14 through the docking exhaust pipe orifice 16 and undergoes spiral transmission. Moreover, the first ozone injector 13, the first connecting pipe 13-1, the second ozone injector 15, and the second connecting pipe 15-1 can introduce ozone gas and dilution air for ozone denitrification and accelerating the transmission of flue gas, so that the flue gas spirally enters the inside of the treatment chamber 9. At the same time, the atomizer 8 can perform atomization treatment, enabling the lime water to be evenly atomized and sprayed, cooperating with the rotating flue gas in the treatment chamber 9 to achieve the denitrification and desulfurization treatment work. The waste residue can be discharged to the common scraper conveyor 4 through the tower bottom scraper conveyor 11. The flue gas can be introduced into the inside of the bag filter 6 through the connecting docking pipe 10 and the docking structure 3. When passing through the docking structure 3, secondary denitrification and desulfurization treatment can be performed, and then it reaches the inside of the bag filter 6 for dust removal treatment work. After that, the waste residue is discharged into the common scraper conveyor 4 through the bag scraper conveyor 5, and the flue gas continues to be conducted. The atomizer 8 is used for atomization treatment. The main motor 43 is driven to work, and the internal fan blades are controlled to rotate through the gear speed increaser 42 to perform centrifugal atomization treatment on the lime liquid, so that the lime liquid is atomized and sprayed out through the atomization disc 39. The setting of the spreader 44 facilitates cooperation with the crane 1 for lifting treatment. The enclosed space 12 in the SDA denitrification and desulfurization reaction tower 2 seals and protects the flue gas distributor 7 and the atomizer 8 to prevent leakage problems; The SDA denitration and desulfurization reaction tower 2 is used for denitration and desulfurization treatment. The SDA denitration and desulfurization reaction tower 2 is connected through a flue gas distributor 7 and an atomizer 8 to perform cyclone denitration and desulfurization treatment. The flue gas distributor 7 adopts a spiral distribution to evenly introduce exhaust gas. The atomizer 8 is arranged on the top of the flue gas distributor 7. Its function is to crush the lime slurry into droplets with a diameter of less than 30 microns to greatly increase the specific surface area of ​​the lime slurry. At the same time, the droplets can be suspended in the flue gas, increasing the contact area and contact time between the acidic gas molecules in the flue gas and the calcium hydroxide molecules in the lime slurry, and has a higher reaction efficiency. The waste heat of the flue gas evaporates the water in the lime slurry, and the product of the acidic gas and the lime slurry is dust particles. The flue gas outlet of the treatment chamber 9 is located at the ash hopper at the bottom of the tower. When the flue gas is discharged from the treatment chamber 9, due to the change in flow direction and the action of centrifugal force, part of the dust separates from the flue gas and falls into the ash hopper; The docking structure 3 is used for docking the SDA denitration and desulfurization reaction tower 2 and the bag filter 6, and for secondary denitration and desulfurization treatment. The denitration and desulfurization treatment component 18 in the docking structure 3 adopts a rotating structure design to evenly introduce the lime treatment material. A conical sleeve 31 is provided on the first matching toothed disc 30 to constrain the circulation environment. The guide inner ring 46 in the first connecting treatment unit 28 is driven by the second matching toothed disc 35, the docking shaft 36, and the rotating matching disc 45 to perform rotational spraying.

[0026] The SDA denitration and desulfurization reaction tower 2 includes a closed room 12, a flue gas distributor 7 is provided at the lower end of the closed room 12, an atomizer 8 is provided at the center of the flue gas distributor 7, the lower ends of the flue gas distributor 7 and the atomizer 8 are connected to the treatment chamber 9, and a connecting pipe 10 is provided at the side end of the treatment chamber 9, and a tower bottom scraper conveyor 11 is installed at the bottom of the treatment chamber 9. The flue gas from the outlet of the solid waste furnace enters the treatment chamber 9 from the top flue gas distributor 7, passes through the guide vanes in the distributor at the top entrance of the tower, and the flue gas is discharged in the SDA The denitration and desulfurization reaction tower 2 has a rotating turbulent flow, and lime slurry is sprayed into the flue gas to react with the acidic substances in the flue gas to neutralize the acidic substances. The flue gas with a large amount of dust after the acidic substances are removed is introduced into the bag filter 6 from the lower part of the treatment chamber 9 through the docking structure 3. At the same time, a docking structure 3 is provided between the outlet of the SDA denitration and desulfurization reaction tower 2 and the inlet of the bag filter 6, so that slaked lime powder can be sprayed to absorb the acidic gas in the flue gas. It is put into use when the SDA semi-dry system fails or is under maintenance to ensure that the emission of pollutants meets the standards.

[0027] The smoke distributor 7 includes an air duct 14, a connecting exhaust pipe port 16 is provided at the top of the air duct 14, and a first connecting pipe 13-1 and a second connecting pipe 15-1 are provided on the air duct 14. The first connecting pipe 13-1 and the second connecting pipe 15-1 introduce dilution air to accelerate circulation.

[0028] The docking structure 3 includes a protective housing 17 and a denitrification and desulfurization treatment component 18. The denitrification and desulfurization treatment component 18 is limitedly arranged within the protective housing 17. The denitrification and desulfurization treatment component 18 is used for denitrification and desulfurization treatment, and the protective housing 17 is used for communicating and docking with the docking pipe 10.

[0029] The denitrification and desulfurization treatment component 18 includes a mounting frame 19. A control motor 23 is installed on the side end of the mounting frame 19. The control motor 23 drives a second gear disk 22 and a first gear disk 20 through a driving rod 27. The size of the second gear disk 22 is three-quarters of that of the first gear disk 20. The first gear disk 20 and the second gear disk 22 are meshed and connected with a denitrification and desulfurization treatment mechanism 26, capable of controlling the rotation of the denitrification and desulfurization treatment mechanism 26. An external sleeve 25 is sleeved on the outer wall of the denitrification and desulfurization treatment mechanism 26. The side end of the denitrification and desulfurization treatment mechanism 26 is fixedly connected to a docking conduit 24. The docking conduit 24 is fixedly sealed with the protective housing 17. The denitrification and desulfurization treatment mechanism 26 is rotatably arranged on the external sleeve 25.

[0030] The denitrification and desulfurization treatment mechanism 26 includes a first communication and treatment unit 28 and a second communication and treatment unit 29. The first communication and treatment unit 28 and the second communication and treatment unit 29 are arranged on both sides of a first mating gear disk 30 and a conical sleeve 31, and the first mating gear disk 30 is fixedly communicated with the conical sleeve 31. The center of the first mating gear disk 30 is a hollow structure.

[0031] The first communication and treatment unit 28 includes a pressurizing and guiding seat 32. The pressurizing and guiding seat 32 is communicated with a spraying ring 34 through a communication and guiding pipe 33. A guiding inner ring 46 is communicated and arranged on the inner wall of the spraying ring 34, and the guiding inner ring 46 can rotate within the spraying ring 34 for the dispersion treatment of lime material. A second mating gear disk 35 is rotatably arranged at the side end of the spraying ring 34. The second mating gear disk 35 is fixedly connected to the guiding inner ring 46 through a docking shaft 36, and the side end of the docking shaft 36 is also fixedly connected to a rotating mating disk 45. Through the structural arrangement of the docking structure 3, the protective housing 17 within the docking structure 3 is used for the communication between the SDA denitrification and desulfurization reaction tower 2 and the bag filter 6. The control motor 23 performs differential drive through the second gear disk 22 and the first gear disk 20, so that the second mating gear disk 35 rotates differentially with the first mating gear disk 30. When the waste gas is guided and discharged through the middle of the first mating gear disk 30 and the conical sleeve 31, the second mating gear disk 35 drives the guiding inner ring 46 to rotate through the docking shaft 36 and the rotating mating disk 45 for rotary spraying, so that the lime powder is evenly sprayed. Moreover, due to the conical structure setting of the conical sleeve 31, blockage is prevented, and the gas carrying the lime powder is evenly guided and discharged for transmission.

[0032] The atomizer 8 includes a sling 44. A main motor 43 is provided at the lower end of the sling 44. The lower end of the main motor 43 is drivingly connected to a gear speed increaser 42. The gear speed increaser 42 is communicated with an outer conical barrel 40 through a flange 41. An atomizing disc 39 is provided at the bottom of the outer conical barrel 40. An electric control box 37 is provided at the side end of the main motor 43. An oil pump 38 is installed at the front end of the electric control box 37. The oil pump 38 and the main motor 43 cooperate to perform atomization treatment. Through the setting of the atomizer 8, the electric control box 37 can control the oil pump 38 and the main motor 43 to work. The main motor 43 can be controlled through the gear speed increaser 42. Thus, through the gear speed increaser 42, the centrifugal principle can be utilized to perform atomization treatment work. The bottom scraper conveyor 11 and the cloth bag scraper conveyor 5 at the bottom end in the SDA denitration and desulfurization reaction tower 2 are both communicated with a common scraper conveyor 4, which is convenient for the guiding and discharging treatment of waste residues. And after the SDA denitration and desulfurization reaction tower 2 is treated, secondary treatment can be carried out through the docking structure 3. The docking structure 3 can also be used as an alternative solution to perform deacidification treatment when the SDA denitration and desulfurization reaction tower 2 cannot operate normally. Finally, the waste gas can reach the bag filter 6 to perform the third treatment process to ensure the denitration and desulfurization treatment capacity.

[0033] The second mating tooth disc 35, the rotating mating disc 45, and the discharge inner ring 46 rotate on the conical sleeve 31, and there is a rotational speed difference between the second mating tooth disc 35, the rotating mating disc 45, and the discharge inner ring 46 and the first mating tooth disc 30 and the conical sleeve 31. The lower end of the treatment chamber 9 is communicated with the docking structure 3 through a connecting and docking pipe 10. The flue gas enters the inside of the docking structure 3 through the protective housing 17 and is introduced onto the conical sleeve 31. The control motor 23 can drive the first tooth disc 20 and the second tooth disc 22 through the driving rod 27. The tooth shapes of the first tooth disc 20 and the second tooth disc 22 are different, and the differential operation of the first tooth disc 20 and the second tooth disc 22 can be controlled. The first tooth disc 20 drives the first mating tooth disc 30 to rotate, and the second tooth disc 22 drives the second mating tooth disc 35 to rotate. The docking conduit 24 and the outer sleeve 25 are fixed to play a role in support and protection. Lime is introduced into the connecting discharge pipe 33 through the pressure discharge seat 32. At this time, the second mating tooth disc 35 can drive the discharge inner ring 46 and the rotating mating disc 45 to rotate synchronously through the docking shaft 36. Along with the rotation of the discharge inner ring 46 in the spraying ring 34, the lime can be rotated and sprayed under the centrifugal force, uniformly contacting the flue gas, so that the flue gas and the lime are mixed and treated in the conical sleeve 31. When leaving the conical sleeve 31, it can contact the second connecting treatment unit 29 again to perform denitration and desulfurization treatment again, and then be introduced into the inside of the bag filter 6 to complete the overall denitration and desulfurization treatment work.

[0034] A groove adapted to the second tooth disc 22 is provided on the outer sleeve 25. The protective housing 17 is fixedly connected to the mounting frame 19, and the conical sleeve 31 is arranged in a conical structure, so that the waste gas carrying lime material can be discharged without obstruction.

[0035] The working principle is as follows: When in use, the flue gas distributor 7 in the SDA denitration and desulfurization reaction tower 2 can achieve the incoming flue gas. The flue gas is introduced into the air duct 14 through the butt joint exhaust pipe orifice 16 and undergoes spiral transmission. Moreover, the first connecting pipe 13-1 and the second connecting pipe 15-1 can introduce dilution air gas to accelerate the transmission of the flue gas, enabling the flue gas to spiral into the interior of the treatment chamber 9. Meanwhile, the atomizer 8 can perform atomization treatment, enabling the lime water to be evenly atomized and sprayed, and cooperating with the rotating flue gas in the treatment chamber 9 to achieve the denitration and desulfurization treatment work. The waste residue can be discharged to the common scraper conveyor 4 through the bottom scraper conveyor 11 of the tower. The flue gas can be introduced into the interior of the bag filter 6 through the connecting butt joint pipe 10 and the butt joint structure 3. When passing through the butt joint structure 3, secondary denitration and desulfurization treatment can be carried out, and then it reaches the interior of the bag filter 6 for dust removal treatment work. After that, the waste residue is discharged into the common scraper conveyor 4 through the bag scraper conveyor 5. The flue gas continues to conduct. The atomizer 8 is used for atomization treatment. The main motor 43 drives the work. The internal fan blades are controlled to rotate through the gear speed increaser 42, and the lime liquid is centrifugally atomized, enabling the lime liquid to be atomized and sprayed out through the atomization disc 39. The setting of the lifting appliance 44 facilitates the cooperation with the crane 1 for hoisting treatment. The enclosed space 12 in the SDA denitration and desulfurization reaction tower 2 seals and protects the flue gas distributor 7 and the atomizer 8 to prevent leakage problems; The lower end of the treatment chamber 9 is connected to the butt joint structure 3 through the connecting butt joint pipe 10. The flue gas enters the interior of the butt joint structure 3 through the protective housing 17 and is introduced onto the conical sleeve 31. The control motor 23 can drive the first gear disc 20 and the second gear disc 22 through the driving rod 27. The tooth shapes of the first gear disc 20 and the second gear disc 22 are different, and the differential operation of the first gear disc 20 and the second gear disc 22 can be controlled. The first gear disc 20 drives the first mating gear disc 30 to rotate, and the second gear disc 22 drives the second mating gear disc 35 to rotate. The butt joint conduit 24 and the external sleeve 25 are fixed to play a role in support and protection. The lime is introduced into the connecting exhaust pipe 33 through the pressurized exhaust seat 32. At this time, the second mating gear disc 35 can drive the exhaust inner ring 46 and the rotating mating disc 45 to rotate synchronously through the butt joint shaft 36. Along with the rotation of the exhaust inner ring 46 in the spraying ring 34, the lime can be rotated and sprayed under the centrifugal force, evenly contacting the flue gas, enabling the flue gas and the lime to be mixed and treated in the conical sleeve 31. When leaving the conical sleeve 31, it can contact the second connecting treatment unit 29 again for secondary denitration and desulfurization treatment, and then be introduced into the interior of the bag filter 6 to complete the overall denitration and desulfurization treatment work.

[0036] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirits of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An atomizing spray semi-dry denitration and desulfurization device and treatment method, characterized in that: The SDA denitration and desulfurization reaction tower (2) comprises a common scraper conveyor (4) connected to the lower end of the SDA denitration and desulfurization reaction tower (2); a bag dust collector (6) is connected to the side end of the SDA denitration and desulfurization reaction tower (2) through a docking structure (3); and the lower end of the bag dust collector (6) is connected to the common scraper conveyor (4) through the bag scraper conveyor (5); An SDA denitration and desulfurization reaction tower (2) is used for denitration and desulfurization treatment, and is provided with a first ozone injector (13), a second ozone injector (15), a first connecting pipe (13-1) and a second connecting pipe (15-1). The SDA denitration and desulfurization reaction tower (2) is connected via a flue gas distributor (7) and an atomizer (8) to perform cyclone denitration and desulfurization treatment, and the flue gas distributor (7) adopts a spiral distribution to uniformly introduce exhaust gas; The docking structure (3) is used for docking the SDA denitration and desulfurization reaction tower (2) and the bag filter (6) and performing secondary denitration and desulfurization treatment. The denitration and desulfurization treatment component (18) in the docking structure (3) adopts a rotating structure design to uniformly introduce lime treatment material. A conical sleeve (31) is provided on the first matching toothed disc (30) to restrict the flow environment. The guide inner ring (46) in the first connecting treatment unit (28) is driven by the second matching toothed disc (35), the docking shaft (36) and the rotating matching disc (45) to perform rotational spraying.

2. The atomization spray semi-dry denitration and desulfurization device and treatment method according to claim 1 is characterized in that: The SDA denitration and desulfurization reaction tower (2) comprises a closed room (12), a flue gas distributor (7) is provided at the lower end of the closed room (12), an atomizer (8) is provided at the center of the flue gas distributor (7), the lower ends of the flue gas distributor (7) and the atomizer (8) are connected to a treatment chamber (9), a connecting butt pipe (10) is provided at the side end of the treatment chamber (9), and a tower bottom scraper conveyor (11) is installed at the bottom of the treatment chamber (9).

3. The atomization spray semi-dry denitration and desulfurization device and treatment method according to claim 1 is characterized by: The flue gas distributor (7) comprises an air duct (14), a connecting exhaust pipe opening (16) is provided at the top of the air duct (14), and a first connecting pipe (13-1) and a second connecting pipe (15-1) are provided on the air duct (14), and the first connecting pipe (13-1) and the second connecting pipe (15-1) are used to introduce ozone and dilution air to accelerate circulation and flue gas ozone denitrification.

4. The atomization spray semi-dry denitration and desulfurization device and treatment method according to claim 3 is characterized by: The docking structure (3) comprises a protective shell (17) and a denitration and desulfurization treatment component (18); the denitration and desulfurization treatment component (18) is disposed within the protective shell (17) at a limited position; the denitration and desulfurization treatment component (18) is used for denitration and desulfurization treatment; and the protective shell (17) is used for docking connection with the butt pipe (10).

5. The atomization spray semi-dry denitration and desulfurization device and treatment method according to claim 4 is characterized in that: The denitration and desulfurization treatment component (18) comprises a mounting frame (19), a control motor (23) is mounted on the side end of the mounting frame (19), and the control motor (23) drives a second gear disc (22) and a first gear disc (20) through a driving rod (27), the size of the second gear disc (22) is three quarters of the first gear disc (20), the first gear disc (20) and the second gear disc (22) are meshedly connected with a denitration and desulfurization treatment mechanism (26), and can control the rotation of the denitration and desulfurization treatment mechanism (26), an external sleeve (25) is sleeved on the outer wall of the denitration and desulfurization treatment mechanism (26), a side end of the denitration and desulfurization treatment mechanism (26) is fixed to a docking conduit (24), the docking conduit (24) is sealed and fixed to a protective shell (17), and the denitration and desulfurization treatment mechanism (26) is rotatably arranged on the external sleeve (25).

6. The atomization spray semi-dry denitration and desulfurization device and treatment method according to claim 5, characterized in that: The denitration and desulfurization treatment mechanism (26) comprises a first connecting treatment unit (28) and a second connecting treatment unit (29); the first connecting treatment unit (28) and the second connecting treatment unit (29) are arranged on both sides of a first matching toothed disc (30) and a conical sleeve (31); the first matching toothed disc (30) and the conical sleeve (31) are fixedly connected; and the center of the first matching toothed disc (30) is a hollow structure.

7. The atomization spray semi-dry denitration and desulfurization device and treatment method according to claim 6, characterized in that: The first communication processing unit (28) comprises a pressurized guide seat (32), the pressurized guide seat (32) being connected to a spraying ring (34) via a connecting guide pipe (33), the inner wall of the spraying ring (34) being connected to a guide inner ring (46), and the guide inner ring (46) being rotatable within the spraying ring (34) to perform a dispersion process on the lime material, and a second matching toothed disc (35) being rotatably provided at a side end of the spraying ring (34), the second matching toothed disc (35) being fixed to the guide inner ring (46) via a docking shaft (36), and the side end of the docking shaft (36) being also fixed to the rotating matching disc (45).

8. The atomization spray semi-dry denitration and desulfurization device and treatment method according to claim 7, characterized in that: The atomizer (8) comprises a sling (44), a main motor (43) is provided at the lower end of the sling (44), a gear speed increasing box (42) is connected to the lower end of the main motor (43), the gear speed increasing box (42) is connected to the outer cone barrel (40) through a flange (41), an atomizing disk (39) is provided at the bottom of the outer cone barrel (40), an electric control box (37) is provided at the side end of the main motor (43), an oil pump (38) is installed at the front end of the electric control box (37), and the oil pump (38) and the main motor (43) cooperate to perform atomization processing.

9. The atomization spray semi-dry denitration and desulfurization device and treatment method according to claim 8, characterized in that: The second mating toothed disc (35), the rotating mating disc (45), and the guide inner ring (46) rotate on the tapered sleeve (31), and there is a speed difference between the second mating toothed disc (35), the rotating mating disc (45), the guide inner ring (46) and the first mating toothed disc (30) and the tapered sleeve (31).

10. The atomization spray semi-dry denitration and desulfurization device and treatment method according to claim 9, characterized in that: The external sleeve (25) is provided with a groove body adapted to the second toothed disc (22), the protective housing (17) is fixedly connected to the mounting frame (19), and the conical sleeve (31) is provided with a conical structure, so that the waste gas carrying the lime material can be discharged without obstacles.

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