Low-temperature large-wind-volume flue gas desulfurization and denitrification purification equipment and method

Abstract

The present application relates to flue gas desulfurization and denitrification technology field, specifically for a kind of low-temperature large air volume flue gas desulfurization and denitrification purification equipment and method, including desulfurization and denitrification tower, dust collector, heat exchange tower, induced draft fan and chimney, the inside of the desulfurization and denitrification tower is provided with inlet section, filter section, speed-up section and spray section, the side of the desulfurization and denitrification tower is equipped with controller;The device realizes simple, stable and efficient, is convenient for the one-time purification treatment of large air volume flue gas;While in the treatment process, according to the plugging condition of filter screen, the bottom fixed ring is moved up and down in the desulfurization and denitrification tower, so as to not only can drive movable plate to tilt and vibrate in filter screen, effectively improve the cleaning effect of filter screen, but also can improve the speed-up and spraying effect of subsequent flue gas, the atomization adsorption effect of water mist is better;Especially can also vertically scrape and clean the inner wall of desulfurization and denitrification tower, improve the cleanliness and stability of desulfurization and denitrification tower.

Description

Technical Field

[0001] The present invention relates to the technical field of flue gas desulfurization and denitrification, and in particular to a low-temperature, high-air-volume flue gas desulfurization and denitrification purification device and method. Background Art

[0002] The flue gas generated by industrial production contains sulfur oxides and nitrogen oxides. If they are directly discharged into the atmosphere without treatment, they will cause a series of environmental problems such as acid rain, photochemical smog and greenhouse effect. Therefore, the flue gas needs to be desulfurized and denitrified before it is discharged. If the above substances are directly discharged into the air, the efficiency of pollutant diffusion will increase to a great extent, and the living environment of the surrounding people will be affected, making people's living conditions worse.

[0003] Publication No. "2020107739772" provides a flue gas desulfurization and denitrification equipment, wherein the bottom of the flue gas desulfurization and denitrification equipment body is fixedly connected to an equipment support column, the top of the equipment support column is fixedly connected to a flue gas filter device, the top of the flue gas filter device is fixedly connected to a flue gas desulfurization and denitrification device, the top of the flue gas desulfurization and denitrification device is fixedly connected to a jack, and the top of the jack is fixedly connected to a rotating motor support plate; the flue gas desulfurization and denitrification equipment has low flue gas purification efficiency and poor flue gas purification effect.

[0004] Publication No. "202011474608X" discloses a flue gas desulfurization and denitrification device, including a desulfurization tower, the bottom side wall of the desulfurization tower is connected to a smoke exhaust pipe, the top side wall is connected to a first conveying pipe, a temperature sensor is provided on the inner wall of the smoke exhaust pipe, the outlet end of the first conveying pipe is connected to a dust collector, the outlet end of the dust collector is connected to a second conveying pipe, the outlet end of the second conveying pipe is connected to an SCR reactor, and the outlet end of the SCR reactor is connected to an exhaust pipe; the device is difficult to operate and has poor purification and adjustability.

[0005] The speed of the flue gas after entering the flue gas filter barrel is certain, which makes it impossible to adjust the air volume when the flue gas passes through. Although the flue gas can be pressurized by an air pump, this method will make the overall flue gas pressure too high, causing the flue gas to impact other structures, thereby reducing the service life of some structures. Moreover, after the flue gas is filtered through the filter, the filter needs to be disassembled as a whole before cleaning, which requires the entire system to be shut down, resulting in the need to stop the flue gas desulfurization and denitrification process.

[0006] When filtering and removing impurities from flue gas with the help of a filter, relying solely on vertical scraping and cleaning of the filter will result in low cleaning efficiency and poor cleaning effect, which will easily affect the subsequent flow and filtration of smoke and dust. However, the existing technology lacks the effect of adaptively adjusting the cleaning of the filter.

[0007] At the same time, a large amount of dust and impurities are easily attached to the inner wall of the desulfurization and denitrification tower when used for a long time. These impurities will not only reduce the cleanliness of the inner wall of the desulfurization and denitrification tower, but also affect the subsequent circulation, purification and removal of flue gas.

[0008] When it is necessary to use water mist to atomize and remove impurities from the flue gas, the atomization degree of the water mist in the existing technology is certain, so the atomization effect of the water mist on the flue gas is certain. When the flue gas volume changes, the atomization degree of the water mist and the flue gas volume need to change accordingly. However, the existing technology lacks the function of adjusting the atomization amount of the water mist according to the change of the flue gas volume, thereby reducing the atomization and cleaning effect of the water mist on the flue gas. Summary of the Invention

[0009] The object of the present invention is to provide a low-temperature, large-volume flue gas desulfurization and denitrification purification device and method to solve the problems raised in the above background technology.

[0010] To achieve the above objectives, the present invention provides the following technical solutions: a low-temperature, high-volume flue gas desulfurization and denitrification purification device, comprising a desulfurization and denitrification tower, a dust collector, a heat exchange tower, an induced draft fan, and a chimney; the desulfurization and denitrification tower is internally provided with an air intake section, a filtration section, a speed increasing section, and a spraying section; a controller is provided on one side of the desulfurization and denitrification tower;

[0011] The filter section includes a top fixing ring and a bottom fixing ring, a shell is fixedly provided on the bottom fixing ring, a partition is fixedly provided on the inner wall of the shell, a filter screen is provided on the surface of the shell, a movable plate is slidably connected to the inside of the filter screen, a plurality of groups of damping rods are evenly hinged on the bottom of the movable plate, a plurality of groups of support plates are evenly provided on the peripheral side of the bottom fixing ring, and the bottom of the damping rod is fixedly connected to the top of the support plate;

[0012] The inner wall of the desulfurization and denitration tower is provided with a spiral limiting groove, the outer surface of the bottom fixing ring is provided with a limiting block, the spiral limiting groove and the limiting block are slidingly connected, the inner wall of the desulfurization and denitration tower is provided with a driving assembly, and the output end of the driving assembly is movably connected to the bottom of the bottom fixing ring;

[0013] The speed increasing section includes a rotating shaft rotatably arranged on the surface of a top fixed ring, the inner wall of the top fixed ring is fixedly provided with two groups of fixed blades in a centrally symmetrical form, a flow rate sensor is provided between adjacent fixed blades, and two groups of movable blades are fixedly provided on the surface of the rotating shaft in a centrally symmetrical form, and the fixed blades and the movable blades are in contact with each other.

[0014] The device can effectively filter and purify the flue gas. When the flow rate value detected by the flow rate sensor decreases, the controller controls the electric push rod to drive the bottom fixed ring to move downward. The bottom fixed ring then spirally rotates and moves downward inside the desulfurization and denitrification tower, further realizing the tilting vibration of the movable plate inside the filter. At the same time, it can also change the atomization effect of the spraying water mist on the flue gas. It has stronger adaptability, better stability and simpler operation.

[0015] Preferably, the outlet of the desulfurization and denitrification tower is connected to the interior of the dust collector, the outlet of the dust collector is connected to the interior of the heat exchange tower, the outlet of the heat exchange tower is connected to the interior of the chimney through an induced draft fan, an air inlet is provided on the surface of the desulfurization and denitrification tower, and the air inlet section is arranged at the bottom of the desulfurization and denitrification tower; the filtration section is arranged above the air inlet section, the speed increasing section is arranged above the filtration section, and the spray section is arranged above the speed increasing section, and the controller electrically controls each electrical component.

[0016] Preferably, the drive assembly includes multiple groups of fixed seats, one side of the fixed seat is fixedly connected to the inner wall of the desulfurization and denitrification tower, an electric control push rod is provided on the top of the fixed seat, a T-shaped slider is provided on the output end of the electric control push rod, and a T-shaped groove is provided at the bottom of the bottom fixing ring, and the T-shaped slider matches the T-shaped groove.

[0017] Preferably, the air intake section includes a baffle and an air guide plate fixedly arranged above the baffle, the baffle is fixedly arranged on the bottom inner wall of the desulfurization and denitrification tower, the air guide plate is inclined at the top of the baffle, the surface of the desulfurization and denitrification tower is hinged with a sealing door, the top fixing ring and the bottom fixing ring are fixedly connected by a connecting rod, and the side wall of the movable plate is provided with bristles that contact the filter screen.

[0018] Preferably, a first spiral blade is fixedly provided on the surface of the rotating shaft, a gear ring is fixedly provided on the inner wall of the desulfurization and denitrification tower, a connecting seat is fixedly connected to the surface of the rotating shaft, and baffles are provided on the top and bottom of the gear ring.

[0019] Preferably, a gear meshing with a gear ring is rotatably provided on the surface of the connecting seat through a connecting arm, a driving shaft passing through the connecting arm is fixedly provided on the surface of the gear, and a second spiral blade is fixedly provided on the surface of the driving shaft.

[0020] Preferably, the spray section includes an annular pipe fixedly arranged on the inner wall of the desulfurization and denitrification tower, the surface of the annular pipe is connected to a water inlet pipe extending to the outside, and the bottom of the annular pipe is connected to an atomizing nozzle.

[0021] Preferably, a motor is fixedly provided inside the housing, an output end of the motor passes through the housing and is fixedly connected to the rotating shaft, and a protective shell of the motor is also fixedly provided at the bottom of the housing.

[0022] Preferably, the bottom fixed ring is arranged obliquely downward along the inner wall of the desulfurization and denitrification tower toward the central axis, the damping rod is elastic, the filter is elastic, the diameter of the movable plate matches the diameter of the filter, and the flow rate sensor is used to detect the flow rate value between adjacent fixed blades.

[0023] A low-temperature, high-volume flue gas desulfurization and denitrification purification method, wherein the flue gas is purified by using the low-temperature, high-volume flue gas desulfurization and denitrification purification equipment according to claim 1, comprising the following steps:

[0024] S1, smoke filtration, at this time, the smoke will enter the interior of the housing, and the smoke will continuously lift the movable plate, so that the smoke will pass through the filter, and the filter will filter the large particles of dust in the smoke;

[0025] S2, the smoke speed increases, the rotating shaft can drive the movable blades to rotate synchronously when rotating, and when the movable blades block the gaps between the fixed blades, the smoke cannot move further;

[0026] S3, flue gas spraying. When the flue gas moves to the top of the desulfurization and denitrification tower, the flue gas after desulfurization and denitrification can enter the dust collector through the pipeline at the top of the desulfurization and denitrification tower for further dust removal. After the dust removal is completed, the flue gas will enter the heat exchange tower for cooling. The cooled flue gas can be directly discharged through the chimney;

[0027] S4, flue gas regulation, when the flow rate value detected by the flow rate sensor decreases, the controller controls the electric control push rod to start and drive the bottom fixed ring to move downward, and the bottom fixed ring drives the bottom fixed ring to rotate spirally and move downward inside the desulfurization and denitrification tower through the limiting cooperation of the limiting block and the spiral limiting groove, and the movable plate tilts and vibrates inside the filter.

[0028] The device further limits the flue gas purification method and improves the flue gas purification efficiency and effect.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1. The present invention divides the desulfurization and denitrification tower into four areas, so that the flue gas can be filtered and accelerated after entering the desulfurization and denitrification tower, and then enter the dust collector for further dust removal after being atomized and sprayed with desulfurization and denitrification agents, so that the flue gas can be purified more thoroughly, thereby ensuring that the flue gas meets the emission standards.

[0031] 2. The present invention can filter large particles of dust in the flue gas through the filter screen by setting the filter section, and the flow of the flue gas can drive the movable plate to move on the surface of the damping rod. The cooperation of the movable blades and the fixed blades can realize the flow control of the flue gas, and then the movable plate can drive the bristles to move back and forth on the inner wall of the filter screen, so that the mesh on the surface of the filter screen is cleaned by the bristles, preventing large particles of dust from clogging the mesh of the filter screen, realizing self-cleaning of the filter screen, and there is no need to stop the machine to disassemble the filter screen.

[0032] 3. The present invention can increase the speed of the flue gas in the desulfurization and denitrification tower by setting the speed-increasing section, so that the flow speed of the flue gas in the desulfurization and denitrification tower is accelerated, thereby increasing the amount of flue gas entering the dust collector per unit time, and will not cause the flue gas to impact other structures due to excessive pressure, resulting in a reduction in service life. The cooperation of the movable blades and the fixed blades can realize the periodic circulation of the flue gas inside the desulfurization and denitrification tower, and can facilitate the reset of the movable plate under the action of gravity, so that the filter can be cleaned while the flue gas is accelerated.

[0033] 4. The present invention is provided with an operating electric control push rod, a spiral limit groove and a movable plate, so that the device can realize a simple, stable and efficient one-time purification treatment of flue gas with a large air volume; at the same time, during the treatment process, the bottom fixed ring is adaptively controlled to move up and down inside the desulfurization and denitrification tower according to the blockage condition of the filter, thereby not only driving the movable plate to tilt and vibrate inside the filter, effectively improving the cleaning and purification effect of the filter, but also improving the subsequent growth rate and spraying effect of the flue gas, and the atomization adsorption effect of the water mist is better; in particular, the inner wall of the desulfurization and denitrification tower can be vertically scraped and cleaned, thereby improving the cleanliness and stability of the desulfurization and denitrification tower. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0035] Figure 2 This is a schematic diagram of the internal structure of the desulfurization and denitrification tower of the present invention;

[0036] Figure 3 This is a schematic diagram of the connection structure between the top fixing ring and the bottom fixing ring of the present invention;

[0037] Figure 4 This is a schematic diagram of the main structure of the speed increasing section of the present invention;

[0038] Figure 5 Schematic diagram of the cross-sectional structure of the filter screen of the present invention;

[0039] Figure 6 Schematic diagram of the main structure of the spray section of the present invention;

[0040] Figure 7 Schematic diagram of the main structure of the separator of the present invention.

[0041] In the figure: 1. Desulfurization and denitrification tower; 2. Dust collector; 3. Heat exchange tower; 4. Induced draft fan; 5. Chimney; 6. Air inlet; 7. Baffle; 8. Wind guide plate; 9. Sealing door; 10. Top fixing ring; 11. Bottom fixing ring; 12. Connecting rod; 13. Casing; 14. Partition; 15. Damping rod; 16. Movable plate; 17. Brush; 18. Rotating shaft; 19. First spiral blade; 20. Ring gear; 21. Connecting seat; 22. Connecting arm; 23. Gear; 24. Drive shaft; 25. Second spiral blade; 26. Annular pipe; 27. Water inlet pipe; 28. Atomizing nozzle; 29. ​​Motor; 31. Fixed blade; 32. Movable blade; 33. Filter; 34. Spiral limit groove; 35. Limit block; 36. Fixed seat; 37. Electric push rod. DETAILED DESCRIPTION

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0043] Example 1:

[0044] See also Figure 1-7 The present invention provides a technical solution: a low-temperature, high-volume flue gas desulfurization and denitrification purification equipment, comprising a desulfurization and denitrification tower 1, a dust collector 2, a heat exchange tower 3, an induced draft fan 4 and a chimney 5. The outlet of the desulfurization and denitrification tower 1 is connected to the inside of the dust collector 2, the outlet of the dust collector 2 is connected to the inside of the heat exchange tower 3, and the outlet of the heat exchange tower 3 is connected to the inside of the chimney 5 through the induced draft fan 4. An air inlet 6 is provided on the surface of the desulfurization and denitrification tower 1. The interior of the desulfurization and denitrification tower 1 is provided with an air intake section, a filtering section, a speed increasing section and a spraying section. The air intake section is provided at the inside of the desulfurization and denitrification tower 1. The bottom part is used to guide the flue gas into the desulfurization and denitrification tower 1 and isolate the flue gas from the sewage; the filtering section is arranged above the air intake section, which is used to filter the large particles of dust in the flue gas and can perform self-cleaning; the speed increasing section is arranged above the filtering section, which is used to increase the speed of the filtered flue gas so that it can quickly enter the dust collector 2; the spraying section is arranged above the speed increasing section, which is used to spray the desulfurization and denitrification agent to desulfurize and denitrify the flue gas. A controller is provided on one side of the desulfurization and denitrification tower 1, and the controller electrically controls each electrical component.

[0045] The air intake section includes a baffle 7 and an air guide plate 8 fixedly arranged above the baffle 7. The baffle 7 is fixedly arranged on the bottom inner wall of the desulfurization and denitrification tower 1. The air guide plate 8 is tilted at the top of the baffle 7. The surface of the desulfurization and denitrification tower 1 is hinged with a sealing door 9 for sewage discharge. Since the air guide plate 8 is set to an inclined structure, the flue gas can pass smoothly from bottom to top, and the desulfurization and denitrification agent and large particles of dust can fall on the inclined surface of the air guide plate 8, and then move to the bottom of the desulfurization and denitrification tower 1 under the action of gravity. Since the baffle 7 divides the bottom of the desulfurization and denitrification tower 1 into two areas, the flue gas occupies one area, and the other area is used to store the desulfurization and denitrification agent and large particles of dust.

[0046] The filter section includes a top fixing ring 10 and a bottom fixing ring 11. The top fixing ring 10 is fixedly connected to the bottom by a connecting rod 12. A shell 13 is fixedly provided on the bottom fixing ring 11. A partition 14 is fixedly provided on the inner wall of the shell 13. A filter screen 33 is provided on the surface of the shell 13. A movable plate 16 is slidably connected to the inside of the filter screen 33. The bottom of the movable plate 16 is evenly hinged with multiple groups of damping rods 15. The peripheral side of the bottom fixing ring 11 is evenly provided with multiple groups of support plates. The bottom of the damping rod 15 is fixedly connected to the top of the support plate. The side wall of the movable plate 16 is provided with bristles 17 in contact with the filter screen 33. The flue gas continues to move towards the desulfurization degassing through the filter screen 33. When the saltpeter tower 1 moves above, it can push the movable plate 16 upward inside the shell 13, so that the movable plate 16 drives the bristles 17 to move on the surface of the filter 33, thereby cleaning the surface of the filter 33. At this time, the flue gas can be filtered through the filter 33 and then pass through the top fixed ring 10 to enter the speed increase section. When the flow rate of the flue gas is large, the rising distance of the movable plate 16 will increase. When the flow rate of the flue gas is small, the rising distance of the movable plate 16 will decrease. By controlling the flow rate of the flue gas, the movable plate 16 can drive the bristles 17 to move back and forth on the surface of the filter 33, thereby achieving the cleaning of the filter 33 and preventing large particles of impurities in the flue gas from clogging the filter 33.

[0047] The speed increasing section includes a rotating shaft 18 rotatably arranged on the surface of the top fixed ring 10, a first spiral blade 19 is fixedly arranged on the surface of the rotating shaft 18, a gear ring 20 is fixedly arranged on the inner wall of the desulfurization and denitrification tower 1, a connecting seat 21 is fixedly connected to the surface of the rotating shaft 18, a gear 23 meshing with the gear ring 20 is rotatably arranged on the surface of the connecting seat 21 through a connecting arm 22, a driving shaft 24 passing through the connecting arm 22 is fixedly arranged on the surface of the gear 23, a second spiral blade 25 is fixedly arranged on the surface of the driving shaft 24, and the rotating shaft 18 can drive the first spiral blade 19 to rotate Assuming that the rotating shaft 18 rotates clockwise, the rotating shaft 18 can drive the connecting arm 22 to rotate in the same direction through the connecting seat 21. At this time, the connecting arm 22 drives the gear 23 to rotate clockwise as a whole. However, due to the setting of the ring gear 20, the gear 23 can rotate counterclockwise inside the connecting arm 22 under the drive of the ring gear 20 during the revolution, so that the gear 23 drives the second spiral blade 25 to rotate counterclockwise through the drive shaft 24. The flue gas can be accelerated again through the first spiral blade 19 and the second spiral blade 25, thereby increasing the air volume.

[0048] The spray section includes an annular pipe 26 fixedly arranged on the inner wall of the desulfurization and denitrification tower 1. The surface of the annular pipe 26 is connected to a water inlet pipe 27 extending to the outside, and the bottom of the annular pipe 26 is connected to an atomizing nozzle 28. The desulfurization and denitrification agent can be introduced into the annular pipe 26 through the water inlet pipe 27, and then the desulfurization and denitrification agent can be sprayed out after being atomized by the atomizing nozzle 28, so that the water mist-like desulfurization and denitrification agent is fully in contact with the flue gas, and the flue gas is desulfurized and denitrified as much as possible through the desulfurization and denitrification agent. After being sprayed out, the water mist will move toward the bottom of the desulfurization and denitrification tower 1, so that the water mist can backwash the filter 33, and flush down the large particles of dust in the mesh of the filter 33, thereby further achieving the effect of self-cleaning the filter 33, and the angle of the atomizing nozzle 28 is slightly inclined, and the angle can be between 10° and 20°, so that the desulfurization and denitrification agent water mist sprayed by the atomizing nozzle can fully contact with the flue gas.

[0049] A motor 29 is fixedly installed at the bottom of the shell 13, and the output end of the motor 29 passes through the shell 13 and is fixedly connected to the rotating shaft 18. A protective shell for protecting the motor 29 is also fixedly installed at the bottom of the shell 13. The motor 29 can drive the rotating shaft 18, thereby realizing automatic rotation of the rotating shaft 18 and the drive shaft 24. However, the motor 29 is arranged inside the desulfurization and denitrification tower 1. The sulfur- and nitrate-containing gases may cause damage to the motor 29 during transportation. Therefore, the protective shell can be set to wrap and protect the motor 29, isolate the motor 29 from the sulfur- and nitrate-containing gases, and then protect the motor 29, thereby improving the service life of the motor 29.

[0050] The movement of the flue gas in the desulfurization and denitrification tower 1 drives the movable plate 16 to move upward, and the movable plate 16 is moved back and forth by controlling the flow rate of the flue gas, but it is troublesome to repeatedly adjust the flue gas flow rate. Therefore, this embodiment provides movable blades 32 and fixed blades 31, and the flue gas can be turned on and off by the mutual cooperation of the movable blades 32 and the fixed blades 31. The inner wall of the top fixed ring 10 is fixed with two groups of fixed blades 31 in a centrally symmetrical form, and the surface of the rotating shaft 18 is fixed with two groups of movable blades 32 in a centrally symmetrical form. The fixed blades 31 and the movable blades 32 fit each other. When the fixed blades 31 and the movable blades 32 block the flue gas passage, the flue gas continues to converge and lift the movable plate 16 to contact with the partition 14. At this time, the movable plate 16 moves to the highest point. When the flue gas entry completely stops, the movable plate 16 will move to the bottom of the filter 33 under the action of gravity for cleaning.

[0051] After the flue gas enters the desulfurization and denitrification tower 1, as the flue gas continues to move, the flue gas will fill the entire desulfurization and denitrification tower 1 and move toward the top of the desulfurization and denitrification tower 1. After starting, the motor 29 can drive the movable blades 32 to rotate. Since the fixed blades 31 and the movable blades 32 have the same shape, when the fixed blades 31 just block the gaps between the fixed blades 31, the flue gas transportation process is blocked at this time, and the flue gas will gradually increase inside the desulfurization and denitrification tower 1, causing the overall flue gas pressure to increase. At this time, after the motor 29 drives the movable blades 32 to rotate through the rotating shaft 18, the movable blades 32 will expose the gaps between the fixed blades 31. At this time, the flue gas with higher pressure will quickly pass through the gap and move toward the top of the desulfurization and denitrification tower 1. Since the pressure of the flue gas is relatively high, and the gap between the movable blades 32 and the fixed blades 31 is small at the beginning, the flow rate of the flue gas will be greatly increased at this time, thereby playing a role in increasing the air volume.

[0052] The pressurized flue gas is transported into the desulfurization and denitrification tower 1 through the air inlet 6. The purpose of pressurization is to make the flue gas sufficient to lift the movable plate 16. The flue gas will pass through the filter 33, and the filter 33 will filter the large particles of dust in the flue gas. The filtered flue gas will continue to move upward inside the desulfurization and denitrification tower 1. When the flue gas continues to move toward the top of the desulfurization and denitrification tower 1 through the filter 33, it can push the movable plate 16 upward inside the shell 13, so that the movable plate 16 drives the bristles 17 to move on the surface of the filter 33, thereby cleaning the surface of the filter 33. At this time, the flue gas can be filtered through the filter 33 and then pass through the top fixed ring 10 to enter the speed increasing section. When the flow rate of the flue gas is large, the rising distance of the movable plate 16 will increase. When the flow rate of the flue gas is small, the rising distance of the movable plate 16 will decrease. By controlling the flow rate of the flue gas, the movable plate 16 can drive the bristles 17 to move back and forth on the surface of the filter 33, thereby achieving the cleaning of the filter 33 and preventing large particles of impurities in the flue gas from clogging the filter 33.

[0053] After starting, the motor 29 can drive the movable blades 32 to rotate. Since the fixed blades 31 and the movable blades 32 have the same shape, when the fixed blades 31 just block the gap between the fixed blades 31, the flue gas transportation process is blocked at this time, and the flue gas will gradually increase inside the desulfurization and denitrification tower 1, causing the overall flue gas pressure to increase. Under the action of this pressure, the pressure value on the bottom of the movable plate 16 disappears, and it moves downward to return to its original position under the action of the gravity of the damping rod 15 and the movable plate 16, and then the inner wall of the filter 33 is scraped and cleaned with the help of the up and down movement of the movable plate 16.

[0054] At this time, after the motor 29 drives the movable blades 32 to rotate through the rotating shaft 18, the movable blades 32 will expose the gaps between the fixed blades 31. At this time, the flue gas with higher pressure will quickly pass through the gaps and move toward the top of the desulfurization and denitrification tower 1. Since the pressure of the flue gas is relatively high, and the gap between the movable blades 32 and the fixed blades 31 is small at the beginning, the flow rate of the flue gas will be greatly increased at this time.

[0055] Then the desulfurization and denitrification agent is transported through the water inlet pipe 27, and the desulfurization and denitrification agent can be sprayed out after being atomized by the atomizing nozzle 28, so that the water mist desulfurization and denitrification agent is in full contact with the flue gas, and the flue gas is desulfurized and denitrified as much as possible through the desulfurization and denitrification agent. After being sprayed out, the water mist will move toward the bottom of the desulfurization and denitrification tower 1, so that the water mist can backwash the filter 33, and wash down the large particles of dust in the mesh of the filter 33, thereby further achieving the effect of self-cleaning the filter 33. The gas after desulfurization and denitrification will enter the dust collector 2 for dust removal, and then the clean gas after dust removal enters the heat exchange tower 3 for heat exchange treatment. The clean gas after heat exchange can be directly discharged through the chimney 5.

[0056] It should be noted that the dust collector 2, the heat exchange tower 3, the induced draft fan 4, the chimney 5 and the motor 29 are devices or equipment existing in the prior art, or are devices or equipment that can be realized in the prior art, and the specific composition of the dust collector 2, the heat exchange tower 3, the induced draft fan 4, the chimney 5 and the motor 29 is clear to those skilled in the art, so they will not be described in detail.

[0057] Example 2:

[0058] When the filter 33 is actually used to filter and remove impurities from the flue gas, if the filter 33 is only scraped and cleaned vertically by moving the movable plate 16 up and down, the cleaning efficiency is low, the cleaning effect is poor, and it is easy to affect the subsequent flow and filtration of the smoke; at the same time, dust and impurities are easily attached to the inner wall of the desulfurization and denitrification tower 1 after long-term use, thereby reducing the subsequent purification and impurity removal effect of the smoke; and when the volume of impurities in the smoke increases and causes blockage to the filter 33, since the atomizing spray effect of the atomizing nozzle 28 on the smoke is certain, it is impossible to adaptively adjust the spray efficiency of the filter 33 according to the volume of the smoke, thereby reducing the purification and dust removal effect of the smoke.

[0059] In order to solve the above problems, the low-temperature, large-volume flue gas desulfurization and denitrification purification device also includes: a spiral limiting groove 34 is provided on the inner wall of the desulfurization and denitrification tower 1, and the spiral limiting groove 34 is spirally arranged on the inner wall of the desulfurization and denitrification tower 1. A limiting block 35 is provided on the outer surface of the bottom fixed ring 11. The spiral limiting groove 34 is connected to the limiting sliding connection of the limiting block 35 and the spiral limiting groove 34. Therefore, when the bottom fixed ring 11 moves downward, the limiting sliding connection between the limiting block 35 and the spiral limiting groove 34 will drive the bottom fixed ring 11 to rotate and move downward inside the desulfurization and denitrification tower 1. A driving assembly is provided on the inner wall of the desulfurization and denitrification tower 1, and the output end of the driving assembly is movably connected to the bottom of the bottom fixed ring 11. When the driving assembly is started, it can drive the bottom fixed ring 11 to move up and down inside the desulfurization and denitrification tower 1.

[0060] The driving assembly includes multiple groups of fixed seats 36, one side of the fixed seat 36 is fixedly connected to the inner wall of the desulfurization and denitrification tower 1, and an electric control push rod 37 is provided on the top of the fixed seat 36. The output end of the electric control push rod 37 is provided with a T-shaped slider, and the bottom of the bottom fixed ring 11 is provided with a T-shaped slide groove. The T-shaped slider matches the T-shaped slide groove, so when the electric control push rod 37 is started, it will drive the bottom fixed ring 11 to move upward. At the same time, with the help of the cooperation between the T-shaped slider and the T-shaped slide groove, the bottom fixed ring 11 is ensured to rotate at the output end of the electric control push rod 37.

[0061] A flow rate sensor is provided between adjacent fixed blades 31. The flow rate sensor is used to detect the flow rate value between adjacent fixed blades 31, and then indirectly obtain the blockage condition of the filter 33. The bottom fixed ring 11 is tilted downward along the inner wall of the desulfurization and denitrification tower 1 to the central axis position. The dust and impurities that fall along the filter 33 and fall on the top of the bottom fixed ring 11 will slide along the top of the bottom fixed ring 11 to the middle position, and finally fall to the top of the air guide plate 8 and the blocking plate 7 and be discharged. The damping rod 15 has elasticity, and the filter The net 33 is elastic, and the diameter of the movable plate 16 matches the diameter of the filter 33. Therefore, when the movable plate 16 tilts inside the filter 33, it will exert a lateral vibration on the filter 33, and cooperate with the up and down movement of the movable plate 16 to improve the vibration cleaning effect of the filter 33. The gear 23 is connected to the ring gear 20 for limited rotation. For example, the top and bottom of the ring gear 20 are both provided with a retaining ring, which limits the up and down movement of the gear 23. When the gear 23 moves up and down, it will drive the ring gear 20 to move up and down.

[0062] During use, the flue gas is first introduced into the desulfurization and denitrification tower 1 along the air inlet 6. After the flue gas contacts the blocking plate 7, it moves upward along the air guide plate 8 into the desulfurization and denitrification tower 1 and continuously moves upward to the bottom of the movable plate 16. Under the impact of the flue gas, the movable plate 16 stretches the damping rod 15 to move upward. During the movement, the flue gas moves to both sides and passes through the filter 33 to reach the top of the outer shell 13, and is finally discharged along between the adjacent fixed blades 31.

[0063] At this time, the controller controls the motor 29 to start and drive the rotating shaft 18 to rotate. The rotation of the rotating shaft 18 drives the first spiral blade 19 at the top to rotate, further transmitting the flue gas at this position by wind power, thereby improving its upward impact atomization effect with the water mist; at the same time, when the rotating shaft 18 rotates, it drives the connecting seat 21 to rotate, and the connecting seat 21 drives the gear 23 to rotate through the transmission of the connecting arm 22. The gear 23 engages with the ring gear 20 to drive the drive shaft 24 to rotate, and the drive shaft 24 drives the second spiral blade 25 to rotate, thereby further improving the transmission purification effect of the flue gas.

[0064] After that, clean water is introduced into the water inlet pipe 27, and water mist is sprayed out under the action of the annular pipe 26 and the atomizing nozzle 28, thereby improving the purification and cleaning effect of the flue gas. When the rotating shaft 18 rotates, the movable blades 32 are driven to rotate synchronously. The movable blades 32 rotate and continuously cause misalignment and blockage with the fixed blades 31, and the flow rate of the flue gas discharged between adjacent fixed blades 31 gradually changes. When the movable blades 32 block the gaps between the fixed blades 31, the flow rate value detected by the flow rate sensor is zero. At this time, the flue gas cannot be discharged between the adjacent fixed blades 31, and the impact force of the flue gas on the bottom of the movable plate 16 is reduced. Under the elastic force of the damping rod 15 and the deadweight of the movable plate 16, the movable plate 16 is driven to move downward and return to its original position, and then with the help of the up and down movement of the movable plate 16 inside the filter 33, the brush 17 scrapes the filter 33, effectively improving the vertical scraping and impurity removal effect of the filter 33, and the scraping efficiency of the dust and impurities is higher and the scraping effect is better.

[0065] As the flue gas purification continues, some impurities are blocked inside the filter 33. When the movable blades 32 and the fixed blades 31 are staggered with each other, the flow rate value detected by the flow sensor is less than the preset flow rate value set at that position, indicating that the filter 33 is blocked at this time. The controller controls multiple groups of electric control push rods 37 to start contraction and drive the top bottom fixing ring 11 to move downward. When the bottom fixing ring 11 moves downward, the limiting block 35 and the spiral limiting groove 34 cooperate to drive the bottom fixing ring 11 to spirally rotate and move downward inside the desulfurization and denitrification tower 1.

[0066] As the bottom fixing ring 11 moves downward, the gap between the bottom fixing ring 11 and the air guide plate 8 continues to decrease, and the diffusion effect of the smoke discharged along the side of the air guide plate 8 continues to decrease. Therefore, the impact force of the smoke on the movable plate 16 close to the air outlet on the side of the air guide plate 8 continues to increase. Under the action of the impact force of the smoke, the movable plate 16 is driven to tilt upward inside the filter 33 stretching damping rod 15, and the rising height near the air outlet end of the air guide plate 8 increases, and then with the help of the movable plate 16 tilting up and down inside the filter 33, the bristles 17 are used to apply a squeezing force to the filter 33 laterally, thereby improving the elastic vibration efficiency of the filter 33 and ensuring the cleanliness and dredging of the filter 33.

[0067] As the bottom fixing ring 11 continues to spiral downward, the movable plate 16 rotates synchronously inside the filter 33, and the position where the movable plate 16 is tilted by the wind keeps changing. The movable plate 16 tilts and vibrates at different positions of the filter 33, thereby effectively improving the cleaning effect of the filter 33. At the same time, the smaller the gap between the bottom fixing ring 11 and the air outlet of the wind guide plate 8, the greater the tilt vibration amplitude of the movable plate 16 inside the filter 33, thereby effectively improving the tilt vibration effect of the filter 33, and achieving higher cleaning efficiency and better cleaning effect.

[0068] At the same time, as the bottom fixing ring 11 moves downward, the exhaust volume of the flue gas between the two fixed blades 31 decreases, and the connecting rod 12 drives the top fixing ring 10 to move downward synchronously, and the rotating shaft 18 drives the top first spiral blade 19 and the gear ring 20 to move downward, then the gap between the first spiral blade 19 and the top atomizing nozzle 28 increases, and as the first spiral blade 19 and the second spiral blade 25 spirally rotate, the upward transmission effect of the flue gas is further enhanced, and the dispersion effect of the filtered flue gas inside the desulfurization and denitrification tower 1 is effectively improved. At the same time, since the gap between the atomizing nozzle 28 and the top fixing ring 10 is further increased, the atomization downward movement of the water mist sprayed by the atomizing nozzle 28 increases, the atomization effect of the water mist is further enhanced, the dispersion of the water mist is stronger, and the amount of water mist is reduced, the water mist moves downward inside the desulfurization and denitrification tower 1 and the adsorption recovery effect with the flue gas is further enhanced, effectively improving the dust removal and purification effect of the flue gas, and avoiding excessive atomization adsorption of the blocked flue gas by excessive water mist.

[0069] When the flow rate value detected by the flow rate sensor between adjacent fixed blades 31 returns to the preset flow rate value set at that position, it indicates that the blockage of the filter 33 has been resolved. The controller controls the electric push rod 37 to start extending and drives the bottom fixed ring 11 at the top to move upward and return to its original position. The flue gas is discharged along the air outlet of the air guide plate 8 to the interior of the desulfurization and denitrification tower 1 and is in a dispersed state again. The flue gas exerts a uniform impact force on the bottom of the movable plate 16, and the movable plate 16 moves stably up and down inside the filter 33, thereby restoring the above working process.

[0070] When the bottom fixing ring 11 drives the top fixing ring 10 and the gear ring 20 to move up and down, the dust and impurities attached to the inner wall of the desulfurization and denitrification tower 1 can be effectively scraped and cleaned vertically, avoiding a large amount of flue gas adhering to the inner wall of the desulfurization and denitrification tower 1 during long-term use, thereby reducing the subsequent flue gas purification and cleaning effect.

[0071] The flue gas after being atomized and purified falls along the middle of the bottom fixed ring 11 to the other end of the air guide plate 8, and finally falls to the end of the sealing door 9, which is convenient for the subsequent recovery and treatment of the flue gas after adsorption and purification, and effectively solves the problem of the purified flue gas falling back to the air inlet end of the air guide plate 8 and affecting the subsequent transmission and purification of the flue gas.

[0072] The device realizes the filtration, acceleration and spraying of flue gas, has higher purification efficiency and better purification effect, is simple to operate, stable and efficient, and is convenient for one-time purification of flue gas with a large air volume; at the same time, during the treatment process, the bottom fixed ring 11 is adaptively controlled to move up and down inside the desulfurization and denitrification tower 1 according to the blockage condition of the filter 33, thereby not only driving the movable plate 16 to tilt and vibrate inside the filter 33, effectively improving the cleaning and purification effect of the filter 33, but also improving the subsequent acceleration and spraying effect of the flue gas, and the atomization adsorption effect of the water mist is better; in particular, the inner wall of the desulfurization and denitrification tower 1 can be vertically scraped and cleaned, thereby improving the cleanliness and stability of the desulfurization and denitrification tower 1.

[0073] Example 3:

[0074] A low-temperature, high-volume flue gas desulfurization and denitrification purification method, which utilizes a low-temperature, high-volume flue gas desulfurization and denitrification purification device to purify flue gas, comprising the following steps:

[0075] S1, smoke filtration, at this time the smoke will enter the interior of the housing 13, at this time the smoke will continue to lift the movable plate 16, so that the smoke through the filter 33, the filter 33 to filter the large particles of dust in the smoke;

[0076] S2, the smoke increases in speed. The rotating shaft 18 drives the movable blades 32 to rotate synchronously. When the movable blades 32 block the gaps between the fixed blades 31, the smoke cannot move further.

[0077] S3, flue gas spraying. When the flue gas moves to the top of the desulfurization and denitrification tower 1, the flue gas after desulfurization and denitrification can enter the dust collector 2 through the pipeline at the top of the desulfurization and denitrification tower 1 for further dust removal. After the dust removal is completed, the flue gas will enter the heat exchange tower 3 for cooling. The cooled flue gas can be directly discharged through the chimney 5;

[0078] S4, flue gas regulation. When the flow rate value detected by the flow rate sensor decreases, the controller controls the electric control push rod 37 to start and drive the bottom fixed ring 11 to move downward. The bottom fixed ring 11 drives the bottom fixed ring 11 to rotate spirally and move downward inside the desulfurization and denitrification tower 1 through the limiting cooperation of the limiting block 35 and the spiral limiting groove 34. The movable plate 16 tilts and vibrates inside the filter 33.

[0079] By further limiting the flue gas atomization method, the flue gas purification effect and purification quality are effectively improved, and the operation is simple, stable and efficient.

[0080] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A low-temperature, high-volume flue gas desulfurization and denitrification purification equipment, characterized by: It includes a desulfurization and denitrification tower, a dust collector, a heat exchange tower, an induced draft fan and a chimney. The interior of the desulfurization and denitrification tower is provided with an air intake section, a filtration section, a speed increasing section and a spraying section. A controller is provided on one side of the desulfurization and denitrification tower. The filter section includes a top fixing ring and a bottom fixing ring, a shell is fixedly provided on the bottom fixing ring, a partition is fixedly provided on the inner wall of the shell, a filter screen is provided on the surface of the shell, a movable plate is slidably connected to the inside of the filter screen, a plurality of groups of damping rods are evenly hinged on the bottom of the movable plate, a plurality of groups of support plates are evenly provided on the peripheral side of the bottom fixing ring, and the bottom of the damping rod is fixedly connected to the top of the support plate; The inner wall of the desulfurization and denitration tower is provided with a spiral limiting groove, the outer surface of the bottom fixing ring is provided with a limiting block, the spiral limiting groove and the limiting block are slidingly connected, the inner wall of the desulfurization and denitration tower is provided with a driving assembly, and the output end of the driving assembly is movably connected to the bottom of the bottom fixing ring; The speed increasing section includes a rotating shaft rotatably arranged on the surface of a top fixed ring, the inner wall of the top fixed ring is fixedly provided with two groups of fixed blades in a centrally symmetrical form, a flow rate sensor is provided between adjacent fixed blades, and two groups of movable blades are fixedly provided on the surface of the rotating shaft in a centrally symmetrical form, and the fixed blades and the movable blades are in contact with each other.

2. The low-temperature, high-volume flue gas desulfurization and denitrification purification equipment according to claim 1 is characterized by: The outlet of the desulfurization and denitrification tower is connected to the interior of the dust collector, the outlet of the dust collector is connected to the interior of the heat exchange tower, and the outlet of the heat exchange tower is connected to the interior of the chimney through an induced draft fan. An air inlet is provided on the surface of the desulfurization and denitrification tower, and the air inlet section is arranged at the bottom of the desulfurization and denitrification tower; the filtering section is arranged above the air inlet section, the speed increasing section is arranged above the filtering section, and the spraying section is arranged above the speed increasing section, and the controller electrically controls each electrical component.

3. The low-temperature, high-volume flue gas desulfurization and denitrification purification equipment according to claim 1 is characterized by: The driving assembly includes multiple groups of fixed seats, one side of the fixed seat is fixedly connected to the inner wall of the desulfurization and denitrification tower, an electric control push rod is provided on the top of the fixed seat, a T-shaped slider is provided on the output end of the electric control push rod, and a T-shaped slide groove is provided at the bottom of the bottom fixing ring, and the T-shaped slider matches the T-shaped slide groove.

4. The low-temperature, high-volume flue gas desulfurization and denitrification purification equipment according to claim 1 is characterized by: The air intake section includes a baffle and an air guide plate fixed above the baffle, the baffle is fixed on the bottom inner wall of the desulfurization and denitrification tower, the air guide plate is tilted at the top of the baffle, a sealing door is hinged on the surface of the desulfurization and denitrification tower, the top fixing ring and the bottom fixing ring are fixedly connected by a connecting rod, and the side wall of the movable plate is provided with bristles that contact the filter screen.

5. The low-temperature, high-volume flue gas desulfurization and denitrification purification equipment according to claim 1 is characterized by: A first spiral blade is fixedly provided on the surface of the rotating shaft, a gear ring is fixedly provided on the inner wall of the desulfurization and denitrification tower, a connecting seat is fixedly connected to the surface of the rotating shaft, and baffles are provided on the top and bottom of the gear ring.

6. The low-temperature, high-volume flue gas desulfurization and denitrification purification equipment according to claim 5, characterized in that: The surface of the connecting seat is provided with a gear meshing with the gear ring through the rotation of the connecting arm, the surface of the gear is fixedly provided with a driving shaft passing through the connecting arm, and the surface of the driving shaft is fixedly provided with a second spiral blade.

7. The low-temperature, high-volume flue gas desulfurization and denitrification purification equipment according to claim 1 is characterized by: The spray section includes an annular pipe fixedly arranged on the inner wall of the desulfurization and denitrification tower, the surface of the annular pipe is connected to a water inlet pipe extending to the outside, and the bottom of the annular pipe is connected to an atomizing nozzle.

8. The low-temperature, high-volume flue gas desulfurization and denitrification purification equipment according to claim 1, characterized in that: A motor is fixedly arranged inside the shell, an output end of the motor passes through the shell and is fixedly connected to the rotating shaft, and a protective shell of the motor is also fixedly arranged on the bottom of the shell.

9. The low-temperature, high-volume flue gas desulfurization and denitrification purification equipment according to claim 1, characterized in that: The bottom fixed ring is arranged obliquely downward along the inner wall of the desulfurization and denitrification tower toward the central axis position, the damping rod is elastic, the filter is elastic, the diameter of the movable plate matches the diameter of the filter, and the flow rate sensor is used to detect the flow rate value between adjacent fixed blades.

10. A low-temperature, high-volume flue gas desulfurization and denitrification purification method, wherein the flue gas is purified by using the low-temperature, high-volume flue gas desulfurization and denitrification purification equipment according to claim 1, characterized in that: The following steps are involved: S1, smoke filtration, at this time, the smoke will enter the interior of the housing, and the smoke will continuously lift the movable plate, so that the smoke will pass through the filter, and the filter will filter the large particles of dust in the smoke; S2, the smoke speed increases, the rotating shaft can drive the movable blades to rotate synchronously when rotating, and when the movable blades block the gaps between the fixed blades, the smoke cannot move further; S3, flue gas spraying. When the flue gas moves to the top of the desulfurization and denitrification tower, the flue gas after desulfurization and denitrification can enter the dust collector through the pipeline at the top of the desulfurization and denitrification tower for further dust removal. After the dust removal is completed, the flue gas will enter the heat exchange tower for cooling. The cooled flue gas can be directly discharged through the chimney; S4, flue gas regulation, when the flow rate value detected by the flow rate sensor decreases, the controller controls the electric control push rod to start and drive the bottom fixed ring to move downward, and the bottom fixed ring drives the bottom fixed ring to rotate spirally and move downward inside the desulfurization and denitrification tower through the limiting cooperation of the limiting block and the spiral limiting groove, and the movable plate tilts and vibrates inside the filter.

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