A flue gas desulfurization and denitrification treatment device with self-cleaning function

Abstract

The present invention discloses a flue gas desulfurization and denitration treatment device with a self-cleaning function, and belongs to the technical field of flue gas desulfurization and denitration treatment devices. It includes a denitrification agent feeding box, a desulfurization agent feeding box, a reaction tower, a dust removal device, a chimney and a smoke inlet pipe. The present invention utilizes the high-speed rotation of the first blade to compress the air, generate a spiral high-pressure airflow, disturb the catalyst and the flue gas, and break up the catalyst and the flue gas. At the same time, when the high-pressure spiral gas rises, it purges the nearby tower wall, effectively preventing the reaction product and the catalyst from adhering to the tower wall, and realizing the self-cleaning of the tower wall; the second blade is used to reversely rotate and purge the double-layer bag assembly, blow off part of the dust attached to the first bag and the second bag, and drive the double-layer bag assembly to rotate, so that the dust on the first bag and the second bag is centrifugally thrown off; the first bag and the second bag are vibrated continuously by repeated impacts of the vibration plate and the vibration paddle, so that the dust further falls, and the dust self-cleaning is realized.

Description

Technical Field

[0001] The invention relates to the technical field of flue gas desulfurization and denitrification treatment devices, and in particular to a flue gas desulfurization and denitrification treatment device with a self-cleaning function. Background Art

[0002] Dry flue gas desulfurization and denitrification is an environmental protection technology that removes sulfur dioxide and nitrogen oxides produced by the combustion of coal and other fuels by applying solid adsorbents and catalysts. This technology has the advantages of simple process, low energy consumption, and high flue gas temperature after purification, but it may face challenges such as relatively low desulfurization efficiency and large equipment investment. It has been widely used in many industrial fields, including nitrogen fertilizer plants, methanol plants, etc., to treat various types of sulfur-containing and nitrogen-containing raw gases. As environmental protection standards are improved, this technology will continue to be optimized and improved to meet more stringent environmental protection requirements.

[0003] In the process of flue gas dust removal, in order to improve the dust removal efficiency and achieve better dust removal effects, some manufacturers use double-layer bags to filter dust. This method significantly improves the filtering effect, but due to the design of the double-layer bags, when the pulse gas is sprayed toward the inner bag, the dust on the inner bag will be difficult to pass through the outer bag, causing dust accumulation between the outer bag and the inner bag, making it impossible for the pulse gas to remove the attached dust. In severe cases, the bags will be frequently blocked, and the bags will be damaged by the impact of the pulse gas. In addition, due to the limitations of the dry desulfurization and denitrification technology itself, it is easy for the unreacted catalyst to adhere to the inner wall of the reaction tower, and when the reaction tower fails due to staff operating errors or itself, it is easy for the catalyst and reaction products to agglomerate and cause blockage. Therefore, there is an urgent need for a device that can solve the above problems. Summary of the invention

[0004] The object of the present invention is to provide a flue gas desulfurization and denitrification treatment device with a self-cleaning function to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a flue gas desulfurization and denitrification treatment device with self-cleaning function includes a denitrification agent feeding box, a desulfurization agent feeding box, a dust removal device and a reaction tower. The denitrification agent feeding box and the desulfurization agent feeding box are connected with the interior of the reaction tower through a pipeline. A smoke inlet pipe is installed on the reaction tower. The reaction tower is connected with the interior of the dust removal device through a pipeline. The dust removal device is connected with the interior of the chimney through a pipeline. The denitrification agent feeding box, the desulfurization agent feeding box, the dust removal device and the bottom end of the reaction tower are all installed with brackets. The reaction tower is used for desulfurization and denitrification reactions. The dust removal device is used to filter dust and other solid particles in the flue gas.

[0006] The flue gas desulfurization and denitrification treatment device is externally connected to a control system, which is used to control the entire device; the flue gas enters the reaction tower from the smoke inlet pipe, and the denitrification agent feeding box and the desulfurization agent feeding box transport the denitrification agent and the desulfurization agent to the reaction tower. The flue gas meets and reacts with the denitrification agent and the desulfurization agent in the reaction tower, and the sulfur and nitrogen in the flue gas are removed and reaction products are generated. Some of the reaction products fall to the bottom of the reaction tower and are collected and removed, and the other part of the reaction products enter the dust removal device together with the flue gas. The dust removal device filters solid particles such as dust and reaction products. The filtered flue gas enters the chimney and is discharged after final treatment.

[0007] The reaction tower comprises a tower wall, a turbulent jet ring is installed in the tower wall, a reaction hopper is installed on the turbulent jet ring, a feed pipe is rotatably installed at the bottom of the reaction hopper, a spiral rod is installed in the feed pipe, a plurality of first blades are installed on the feed pipe, a first motor is installed on the tower wall, an output shaft of the first motor is rotatably connected to the feed pipe through gears and belts, a plurality of spring covers are installed on the turbulent jet ring, and a compression chamber is formed between the turbulent jet ring and the first blades.

[0008] The control system controls the flue gas to enter the reaction tower from the smoke inlet pipe, and opens the denitrification agent feeding box and the desulfurization agent feeding box to transport the denitrification agent and the desulfurization agent to the reaction tower. The flue gas meets and reacts with the denitrification agent and the desulfurization agent in the reaction tower. The control system starts the first motor. The output shaft of the first motor drives the feed pipe to rotate through gears and belts. The feed pipe drives the first fan blade to rotate. The rotation of the first fan blade drives the gas to move upward. The upward moving gas gathers in the compression chamber. As the gas continues to increase, the gas in the compression chamber is continuously compressed, so that the air pressure in the compression chamber continues to rise. When the air pressure reaches the critical value, the gas is accelerated to eject through the spiral hole to push the cover plate open.

[0009] The spring cover includes a cover plate, a rotating rod, a spring sheet and a rivet. The rotating rod passes through the cover plate. Connecting blocks are installed at both ends of the rotating rod. The connecting blocks are connected to the spring cover. One end of the spring sheet is connected to the cover plate through a rivet, and the other end of the spring sheet is connected to the spoiler jet ring through a rivet. The spring sheet is made of elastic material. When the external force reaches a critical value, the spring sheet will bend elastically.

[0010] The cover plate is impacted by the airflow, overcomes the elastic force of the spring sheet and rotates along the rotating rod to open, so that the high-pressure gas in the compression chamber is ejected from the spiral hole. The ejected high-pressure gas spirally rises and meets the catalyst and flue gas entering the reaction tower, breaking up the catalyst and flue gas, making the contact area between the catalyst and the flue gas larger, and accelerating the desulfurization and denitrification reactions. At the same time, since the spiral hole is close to the tower wall, the high-pressure gas sweeps the nearby tower wall when it rises, effectively preventing the reaction products and the catalyst from adhering to the tower wall; the flue gas and the catalyst react turbulently upward, and the reaction products obtained by the reaction descend, and are continuously broken up by the upward flue gas and the spiral high-pressure airflow during the descent, making the reaction more complete. The final reaction product falls into the middle reaction hopper under the action of gravity, and enters the discharge pipe along the reaction hopper. Driven by the rotation of the spiral rod, rapid discharge is achieved to prevent the reactants from agglomerating and clogging the discharge pipe.

[0011] The spoiler jet ring is provided with a plurality of spiral holes penetrating up and down, and the cover plate is located at the top of the spiral holes.

[0012] The dust removal device includes a cleaning shell, a bag bracket is installed in the cleaning shell, a double-layer bag assembly is rotatably installed on the bag bracket, a guide device is installed on the bag bracket, the guide device is meshed and transmitted with the double-layer bag assembly, a vibration assembly is installed between the bag bracket and the double-layer bag assembly, an opening and closing assembly is installed in the cleaning shell, and the opening and closing assembly is connected to the double-layer bag assembly.

[0013] The control system starts the second motor, and the output shaft of the second motor drives the second fan blade to rotate. The rotation of the second fan blade drives the filtered smoke to be discharged faster, and also creates negative pressure at the bottom of the second fan blade, which accelerates the smoke to pass through the double-layer bag assembly. The smoke first enters the second bag, then enters the first bag, and then flows out from the hole in the middle of the bag tooth ring. Dust and other solid particles are filtered by the second bag and the first bag respectively.

[0014] When there is too much dust on the double-layer bag assembly and it needs to be cleaned, the control system controls the cylinder to open the sliding block on the opening and closing assembly, and the control system causes the second motor to rotate in the opposite direction. At the same time, the fan connecting rod is controlled to drive the upper gear ring to descend, so that the lower gear ring and the bag gear ring are meshed for transmission, and the second motor drives the second fan to rotate in the opposite direction. The second fan generates airflow and blows it to the first bag and the second bag through the hole in the middle of the bag gear ring, so that part of the dust attached to the first bag and the second bag is blown off, and the second fan drives the upper gear ring to rotate through the fan connecting rod, and the upper gear ring drives the bag gear ring to rotate, and the bag gear ring drives the first bag and the second bag to rotate, so that the dust on the first bag and the second bag is centrifugally thrown off, and the bag gear ring drives the vibration ring to rotate. The vibration plate rotates and hits the vibration paddle. Under the impact of the vibration plate, the vibration paddle overcomes the elastic force of the vibration spring and rotates until the vibration paddle is separated from the vibration plate. The vibration paddle is reset under the action of the vibration spring, and then hits the next vibration plate. Under the repeated impact of the vibration plate and the vibration paddle, the first cloth bag and the second cloth bag continue to vibrate, so that the dust on the second cloth bag and the first cloth bag falls further, and the dust between the first cloth bag and the second cloth bag falls through the gap at the bottom of the first cloth bag and the second cloth bag. The dust falling from the outside of the second cloth bag falls from the gap between the double-layer cloth bag assembly and the opening and closing assembly, and finally falls from the dust dropping port at the bottom of the cleaning shell and is collected, thereby completing the self-cleaning of the dust removal device.

[0015] The double-layer cloth bag assembly includes a cloth bag gear ring, which is meshed with the guide device for transmission, and the bottom end of the cloth bag gear ring is rotatably connected to the cloth bag bracket. The first cloth bag and the second cloth bag are installed at the bottom end of the cloth bag gear ring, and the second cloth bag is located outside the first cloth bag. A cloth bag base support is installed at the bottom end of the second cloth bag, and the cloth bag base support is rotatably installed on the opening and closing assembly. A dust reduction ring is rotatably installed on the cloth bag base support, and the dust reduction ring is connected to the opening and closing assembly.

[0016] The surface of the dust reduction ring is sloped, which can guide the dust to slide down the slope; a bag bracket is installed between the first bag and the second bag, which is used to connect the first bag and the second bag and provide support for the first bag and the second bag.

[0017] The opening and closing assembly includes a slide connecting rod and a lower gear ring, a sliding block is slidably installed on the slide connecting rod, a rotating disk is rotatably installed on the sliding block, a cloth bag base is rotatably installed on the rotating disk, the lower gear ring is installed in the cleaning shell, the lower gear ring is meshed with the rotating disk for transmission, a cylinder is installed outside the cleaning shell, a connecting rod assembly is installed on the cylinder output shaft, the connecting rod assembly passes through the cleaning shell and is connected to the lower gear ring.

[0018] A sealing strip is provided between the connecting rod assembly and the cleaning housing. Under normal conditions, the sliding blocks are tightly closed; under self-cleaning conditions, the control system starts the cylinder, and the cylinder output shaft drives the lower gear ring to rotate through the connecting rod assembly, and the rotation of the lower gear ring drives the rotating disk to rotate, and the rotation of the rotating disk drives the sliding block to rotate. Since the sliding block cannot rotate due to the constraint of the slide groove connecting rod, the sliding block converts the rotation into a linear sliding in the slide groove of the slide groove connecting rod, and the sliding blocks slide open and close, so that the gap between the bottom of the first cloth bag and the second cloth bag is opened, which is convenient for the dust between the first cloth bag and the second cloth bag to fall.

[0019] The flow guide device includes a second motor, the second motor is installed with the top of the cloth bag bracket, the second fan is installed on the output shaft of the second motor, the bottom of the second fan is installed with a fan connecting rod, the bottom of the fan connecting rod is installed with an upper gear ring, the upper gear ring is meshed with the cloth bag gear ring for transmission, and the fan connecting rod is an electric telescopic rod. In the normal state, the fan connecting rod is in a retracted state, and the upper gear ring is not meshed with the cloth bag gear ring; in the self-cleaning state, the fan connecting rod drives the upper gear ring to descend, so that the upper gear ring and the cloth bag gear ring are meshed.

[0020] The vibration assembly includes a vibration ring, a connecting plate and a vibration pick. The vibration ring is installed at the bottom end of the cloth bag gear ring. A number of vibration plates are installed on the vibration ring. The vibration pick is rotatably installed on the cloth bag bracket. The connecting plate is installed on the cloth bag bracket. A vibration spring is installed between the connecting plate and the vibration pick.

[0021] The sliding block is provided with a cylindrical slider, the rotating disk is provided with a slide groove matching the cylindrical slider, the rotating disk is provided with a plurality of tooth columns, and the lower tooth ring and the rotating disk are meshed and transmitted through the tooth columns. The sliding block just blocks the gap between the bottom of the first cloth bag and the second cloth bag. The tooth column design is adopted on the rotating disk, which increases the meshing gap with the lower tooth ring and prevents the meshing effect from being affected by dust stuck due to the meshing gap being too small.

[0022] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: the present invention utilizes the high-speed rotating compressed air of the first blade, in cooperation with the spiral holes and spring cover on the turbulent jet ring, to generate a spiral high-pressure airflow, which disturbs the catalyst and the flue gas, breaks up the catalyst and the flue gas, increases the contact area between the catalyst and the flue gas, and accelerates the desulfurization and denitrification reactions; at the same time, when the high-pressure spiral gas rises, it sweeps the nearby tower wall, effectively preventing the reaction products and the catalyst from adhering to the tower wall, thereby realizing self-cleaning of the tower wall; utilizing a rotating discharge pipe to drive the first blade to rotate, while driving the spiral rod to rotate rapidly, thereby realizing rapid discharge of the reaction product and preventing the reactant from agglomerating and clogging the discharge pipe.

[0023] The rotation of the second blade is used to accelerate the discharge of filtered flue gas under normal conditions, so that negative pressure is generated at the bottom of the second blade, accelerating the flue gas to pass through the double-layer bag assembly; in the cleaning state, the second blade is used to rotate in the opposite direction to blow the double-layer bag assembly, blow off part of the dust attached to the first bag and the second bag, and drive the double-layer bag assembly to rotate, so that the dust on the first bag and the second bag is centrifugally thrown off; when the double-layer bag assembly rotates, it drives the vibration ring to rotate, and the vibration plate and the vibration paddle repeatedly collide, so that the first bag and the second bag are constantly vibrated, thereby causing the dust on the second bag and the first bag to fall further, realizing dust self-cleaning from multiple aspects; the cylinder is used to drive the lower gear ring to rotate, so that the sliding blocks slide open and close, so that the gap at the bottom of the first bag and the second bag is opened, which is convenient for the dust between the first bag and the second bag to fall, and prevents dust from accumulating between the first bag and the second bag and being unable to be discharged, causing serious blockage and affecting the dust removal efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0025] Figure 1 It is an overall elevation view of the flue gas desulfurization and denitrification treatment device of the present invention;

[0026] Figure 2 is a cross-sectional elevation view of a reaction tower of the present invention;

[0027] Figure 3 is an elevation view of the spring cover of the present invention;

[0028] Figure 4 is a cross-sectional view of the spoiler jet ring of the present invention;

[0029] Figure 5 is a cross-sectional elevation view of the dust removal device of the present invention;

[0030] Figure 6 is a lower elevational view of the dust removal device of the present invention;

[0031] Figure 7 is an upper elevation view of the dust removal device of the present invention;

[0032] Figure 8 is an elevation view of the vibration assembly of the present invention;

[0033] In the figure: 1. Denitrification agent feeding box; 2. Desulfurization agent feeding box; 3. Reaction tower; 4. Dust removal device; 5. Chimney; 6. Smoke inlet pipe; 31. Turbine jet ring; 32. Tower wall; 33. First blade; 34. Screw rod; 35. Reaction hopper; 36. Spring cover; 37. Compression chamber; 38. Feeding pipe; 361. Cover plate; 362. Spring sheet; 363. Connecting block; 364. Rivet; 365. Rotating rod; 311. Spiral hole; 41. Cleaning shell; 42. Opening and closing assembly; 43. Diversion device; 44. Double-layer bag assembly; 4 5. Vibration assembly; 421. Lower gear ring; 422. Slide connecting rod; 423. Sliding block; 424. Cylinder; 425. Connecting rod assembly; 426. Rotating plate; 431. Second blade; 432. Blade connecting rod; 433. Upper gear ring; 434. Second motor; 441. First cloth bag; 442. Second cloth bag; 443. Cloth bag gear ring; 444. Cloth bag bottom support; 445. Dust suppression ring; 451. Vibration ring; 452. Connecting plate; 453. Vibration plate; 454. Vibration spring; 455. Vibration pick; 46. Cloth bag bracket. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0035] See also Figure 1-8 The present invention provides a technical solution: a flue gas desulfurization and denitrification treatment device with a self-cleaning function includes a denitrification agent feeding box 1, a desulfurization agent feeding box 2, a dust removal device 4 and a reaction tower 3. The denitrification agent feeding box 1 and the desulfurization agent feeding box 2 are connected to the inside of the reaction tower 3 through a pipeline. A smoke inlet pipe 6 is installed on the reaction tower 3. The reaction tower 3 is connected to the inside of the dust removal device 4 through a pipeline. The dust removal device 4 is connected to the inside of a chimney 5 through a pipeline. The denitrification agent feeding box 1, the desulfurization agent feeding box 2, the dust removal device 4 and the bottom of the reaction tower 3 are all installed with brackets. The reaction tower 3 is used for desulfurization and denitrification reactions. The dust removal device 4 is used for filtering dust and other solid particles in the flue gas.

[0036] The flue gas desulfurization and denitrification treatment device is externally connected to a control system, which is used to control the entire device; the flue gas enters the reaction tower 3 from the smoke inlet pipe 6, the denitrification agent feeding box 1 and the desulfurization agent feeding box 2 transport the denitrification agent and the desulfurization agent to the reaction tower 3, the flue gas meets and reacts with the denitrification agent and the desulfurization agent in the reaction tower 3, the sulfur and nitrogen in the flue gas are removed and reaction products are generated, part of the reaction products fall to the bottom of the reaction tower 3, are collected and removed, and the other part of the reaction products enter the dust removal device 4 together with the flue gas, the dust removal device 4 filters the dust and reaction products and other solid particles, the filtered flue gas enters the chimney 5, and is discharged after final treatment.

[0037] The reaction tower 3 includes a tower wall 32, a turbulent jet ring 31 is installed in the tower wall 32, a reaction hopper 35 is installed on the turbulent jet ring 31, a feed pipe 38 is rotatably installed at the bottom of the reaction hopper 35, a spiral rod 34 is installed in the feed pipe 38, a plurality of first blades 33 are installed on the feed pipe 38, a first motor is installed on the tower wall 32, the output shaft of the first motor is rotatably connected to the feed pipe 38 through gears and belts, a plurality of spring covers 36 are installed on the turbulent jet ring 31, and a compression chamber 37 is between the turbulent jet ring 31 and the first blades 33.

[0038] The spring cover 36 includes a cover plate 361, a rotating rod 365, a spring sheet 362 and a rivet 364. The rotating rod 365 passes through the cover plate 361. Connecting blocks 363 are installed at both ends of the rotating rod 365. The connecting blocks 363 are connected to the spring cover 36. One end of the spring sheet 362 is connected to the cover plate 361 through a rivet 364, and the other end of the spring sheet 362 is connected to the spoiler jet ring 31 through a rivet 364. The spring sheet 362 is made of elastic material. When the external force reaches a critical value, the spring sheet 362 will bend elastically.

[0039] The spoiler jet ring 31 is provided with a plurality of spiral holes 311 penetrating from top to bottom, and the cover plate 361 is located at the top of the spiral holes 311. The dust removal device 4 comprises a cleaning shell 41, a bag bracket 46 is installed in the cleaning shell 41, a double-layer bag assembly 44 is rotatably installed on the bag bracket 46, a guide device 43 is installed on the bag bracket 46, the guide device 43 is meshed with the double-layer bag assembly 44 for transmission, a vibration assembly 45 is installed between the bag bracket 46 and the double-layer bag assembly 44, an opening and closing assembly 42 is installed in the cleaning shell 41, and the opening and closing assembly 42 is connected to the double-layer bag assembly 44.

[0040] The double-layer cloth bag assembly 44 includes a cloth bag toothed ring 443, which is meshed with the guide device 43 for transmission. The bottom end of the cloth bag toothed ring 443 is rotatably connected to the cloth bag bracket 46. The first cloth bag 441 and the second cloth bag 442 are installed at the bottom end of the cloth bag toothed ring 443. The second cloth bag 442 is located on the outside of the first cloth bag 441. A cloth bag base support 444 is installed at the bottom end of the second cloth bag 442. The cloth bag base support 444 is rotatably installed on the opening and closing assembly 42. A dust reduction ring 445 is rotatably installed on the cloth bag base support 444, and the dust reduction ring 445 is connected to the opening and closing assembly 42.

[0041] The surface of the dust reduction ring 445 is sloped, which can guide the dust to slide down the slope; a bag bracket is installed between the first bag 441 and the second bag 442 to connect the first bag 441 and the second bag 442 and provide support for the first bag 441 and the second bag 442.

[0042] The opening and closing assembly 42 includes a slide connecting rod 422 and a lower gear ring 421, a sliding block 423 is slidably installed on the slide connecting rod 422, a rotating disk 426 is rotatably installed on the sliding block 423, a cloth bag base 444 is rotatably installed on the rotating disk 426, the lower gear ring 421 is installed in the cleaning shell 41, the lower gear ring 421 and the rotating disk 426 are meshed for transmission, a cylinder 424 is installed outside the cleaning shell 41, a connecting rod assembly 425 is installed on the output shaft of the cylinder 424, and the connecting rod assembly 425 passes through the cleaning shell 41 and is connected to the lower gear ring 421.

[0043] A sealing strip is provided between the connecting rod assembly 425 and the cleaning housing 41. Under normal conditions, the sliding blocks 423 are tightly closed; under self-cleaning conditions, the control system starts the cylinder 424, and the output shaft of the cylinder 424 drives the lower gear ring 421 to rotate through the connecting rod assembly 425. The rotation of the lower gear ring 421 drives the rotating disk 426 to rotate, and the rotation of the rotating disk 426 drives the sliding block 423 to rotate. Since the sliding block 423 is constrained by the chute connecting rod 422 and cannot rotate, the sliding block 423 converts the rotation into a linear sliding in the chute of the chute connecting rod 422. The sliding blocks 423 slide open and close, so that the gap between the bottom ends of the first cloth bag 441 and the second cloth bag 442 is open, so that the dust between the first cloth bag 441 and the second cloth bag 442 can fall.

[0044] The sliding block 423 is provided with a cylindrical slider, the rotating disk 426 is provided with a slide groove matching the cylindrical slider, the rotating disk 426 is equipped with a plurality of tooth columns, and the lower tooth ring 421 and the rotating disk 426 are meshed and transmitted through the tooth columns. The sliding block 423 just blocks the gap between the bottom of the first cloth bag 441 and the second cloth bag 442. The tooth column design is adopted on the rotating disk, which increases the meshing gap with the lower tooth ring 421, and prevents the meshing effect from being affected by dust stuck due to the meshing gap being too small.

[0045] The flow guide device 43 includes a second motor 434, which is installed with the top of the cloth bag bracket 46, and a second fan 431 is installed on the output shaft of the second motor 434. A fan connecting rod 432 is installed at the bottom end of the second fan 431, and an upper gear ring 433 is installed at the bottom end of the fan connecting rod 432. The upper gear ring 433 is meshed with the cloth bag gear ring 443 for transmission, and the fan connecting rod 432 is an electric telescopic rod.

[0046] In the normal state, the blade connecting rod 432 is in a retracted state, and the upper toothed ring 433 is not engaged with the cloth bag toothed ring 443; in the self-cleaning state, the blade connecting rod 432 drives the upper toothed ring 433 to descend, so that the upper toothed ring 433 and the cloth bag toothed ring 443 are engaged.

[0047] The vibration assembly 45 includes a vibration ring 451, a connecting plate 452 and a vibration paddle 455. The vibration ring 451 is installed at the bottom end of the cloth bag gear ring 443. A plurality of vibration plates 453 are installed on the vibration ring 451. The vibration paddle 455 is rotatably installed on the cloth bag bracket 46. The connecting plate 452 is installed on the cloth bag bracket 46. A vibration spring 454 is installed between the connecting plate 452 and the vibration paddle 455.

[0048] The working principle of the present invention is as follows: the control system controls the flue gas to enter the reaction tower 3 from the smoke inlet pipe 6, and opens the denitrification agent feeding box 1 and the desulfurization agent feeding box 2 to transport the denitrification agent and the desulfurization agent to the reaction tower 3. The flue gas, the denitrification agent and the desulfurization agent meet and react in the reaction tower 3. The control system starts the first motor, and the output shaft of the first motor drives the feed pipe 38 to rotate through gears and belts. The feed pipe 38 drives the first fan blade 33 to rotate. The rotation of the first fan blade 33 drives the gas to move upward. The upward moving gas gathers in the compression chamber 37. As the gas continues to increase, the gas in the compression chamber 37 is continuously compressed, so that the air pressure in the compression chamber 37 continues to rise. When the air pressure reaches the critical value, the gas is accelerated to eject through the spiral hole 311 to push the cover plate 361 open.

[0049] The cover plate 361 is impacted by the airflow, overcomes the elastic force of the spring sheet 362 and rotates along the rotating rod 365 to open, so that the high-pressure gas in the compression chamber 37 is ejected from the spiral hole 311, and the ejected high-pressure gas spirally rises and meets the catalyst and flue gas entering the reaction tower 3, breaks up the catalyst and the flue gas, makes the contact surface between the catalyst and the flue gas larger, and accelerates the desulfurization and denitrification reaction. At the same time, since the spiral hole 311 is close to the tower wall 32, the high-pressure gas sweeps the nearby tower wall 32 when it rises, effectively preventing the reaction products and the catalyst from adhering to the tower wall 32; the flue gas and the catalyst react turbulently upward, and the reaction products obtained by the reaction descend, and are continuously broken up by the upward flue gas and the spiral high-pressure airflow during the descent, so that the reaction is more complete, and the final reaction product falls into the middle reaction hopper 35 under the action of gravity, and enters the discharge pipe 38 along the reaction hopper 35, and is driven by the rotation of the spiral rod 34 to achieve rapid discharge, and prevent the reactants from agglomerating and clogging the discharge pipe 38.

[0050] The control system starts the second motor 434, and the output shaft of the second motor 434 drives the second blade 431 to rotate. The rotation of the second blade 431 drives the filtered smoke to be discharged faster, and also generates negative pressure at the bottom of the second blade 431, which accelerates the smoke to pass through the double-layer bag assembly 44. The smoke first enters the second bag 442, then enters the first bag 441, and then flows out from the hole in the middle of the bag tooth ring 443. Dust and other solid particles are filtered by the second bag 442 and the first bag 441, respectively.

[0051] When there is too much dust on the double-layer bag assembly 44 and it needs to be cleaned, the control system controls the cylinder 424 to open the sliding block 423 on the opening and closing assembly 42, and the control system causes the second motor 434 to rotate in the opposite direction. At the same time, the fan connecting rod 432 is controlled to drive the upper gear ring 433 to descend, so that the lower gear ring 421 and the bag gear ring 443 are meshed for transmission, and the second motor 434 drives the second fan 431 to rotate in the opposite direction. The second fan 431 generates airflow and blows toward the cloth bag through the hole in the middle of the cloth bag gear ring 443. The first cloth bag 441 and the second cloth bag 442 blow off part of the dust attached to the first cloth bag 441 and the second cloth bag 442, the second blade 431 drives the upper toothed ring 433 to rotate through the blade connecting rod 432, the upper toothed ring 433 drives the cloth bag toothed ring 443 to rotate, the cloth bag toothed ring 443 drives the first cloth bag 441 and the second cloth bag 442 to rotate, so that the dust on the first cloth bag 441 and the second cloth bag 442 is centrifugally thrown off, and the cloth bag toothed ring 443 drives the vibration ring 451 to rotate The vibration plate 453 on the vibration ring 451 rotates and hits the vibration paddle 455. The vibration paddle 455 overcomes the elastic force of the vibration spring 454 and rotates under the impact of the vibration plate 453 until the vibration paddle 455 is separated from the vibration plate 453. The vibration paddle 455 is reset under the action of the vibration spring 454, and then hits the next vibration plate 453. Under the repeated impact of the vibration plate 453 and the vibration paddle 455, the first cloth bag 441 and the second cloth bag 442 are continuously vibrated, so that the dust on the second cloth bag 442 and the first cloth bag 441 falls further, and the dust between the first cloth bag 441 and the second cloth bag 442 falls through the gap at the bottom of the first cloth bag 441 and the second cloth bag 442. The dust falling from the outside of the second cloth bag 442 falls from the gap between the double-layer cloth bag assembly 44 and the opening and closing assembly 42, and finally falls from the dust falling port at the bottom of the cleaning shell 41 and is collected, thereby completing the self-cleaning of the dust removal device 4.

[0052] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0053] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A flue gas desulfurization and denitrification treatment device with self-cleaning function, characterized in that: The flue gas desulfurization and denitration treatment device comprises a denitrification agent feeding box (1), a desulfurization agent feeding box (2), a dust removal device (4) and a reaction tower (3); the denitrification agent feeding box (1) and the desulfurization agent feeding box (2) are connected to the inside of the reaction tower (3) through a pipeline; a smoke inlet pipe (6) is installed on the reaction tower (3); the reaction tower (3) is connected to the inside of the dust removal device (4) through a pipeline; the dust removal device (4) is connected to the inside of a chimney (5) through a pipeline; the denitrification agent feeding box (1), the desulfurization agent feeding box (2), the dust removal device (4) and the reaction tower (3) are all installed with brackets at their bottom ends; the reaction tower (3) is used to perform desulfurization and denitration reactions; and the dust removal device (4) is used to filter dust and other solid particles in the flue gas; The reaction tower (3) comprises a tower wall (32), a turbulent jet ring (31) is installed in the tower wall (32), a reaction hopper (35) is installed on the turbulent jet ring (31), a feed pipe (38) is rotatably installed at the bottom end of the reaction hopper (35), a spiral rod (34) is installed in the feed pipe (38), a plurality of first blades (33) are installed on the feed pipe (38), a first motor is installed on the tower wall (32), an output shaft of the first motor is rotatably connected to the feed pipe (38) via a gear and a belt, a plurality of spring covers (36) are installed on the turbulent jet ring (31), and a compression chamber (37) is provided between the turbulent jet ring (31) and the first blades (33); The spring cover (36) comprises a cover plate (361), a rotating rod (365), a spring sheet (362) and a rivet (364); the rotating rod (365) passes through the cover plate (361); connecting blocks (363) are installed at both ends of the rotating rod (365); the connecting blocks (363) are connected to the spring cover (36); one end of the spring sheet (362) is connected to the cover plate (361) via a rivet (364); and the other end of the spring sheet (362) is connected to the spoiler jet ring (31) via a rivet (364); The spoiler jet ring (31) is provided with a plurality of spiral holes (311) penetrating vertically, and the cover plate (361) is located at the top of the spiral holes (311); The dust removal device (4) comprises a cleaning shell (41), a bag bracket (46) is installed in the cleaning shell (41), a double-layer bag assembly (44) is rotatably installed on the bag bracket (46), a flow guide device (43) is installed on the bag bracket (46), the flow guide device (43) and the double-layer bag assembly (44) are meshed and transmitted, a vibration assembly (45) is installed between the bag bracket (46) and the double-layer bag assembly (44), and an opening and closing assembly (42) is installed in the cleaning shell (41), and the opening and closing assembly (42) is connected to the double-layer bag assembly (44).

2. The flue gas desulfurization and denitrification treatment device with self-cleaning function according to claim 1, characterized in that: The double-layer cloth bag assembly (44) comprises a cloth bag toothed ring (443), the cloth bag toothed ring (443) meshingly transmitting with the guide device (43), the bottom end of the cloth bag toothed ring (443) being rotatably connected to the cloth bag bracket (46), the bottom end of the cloth bag toothed ring (443) being mounted with a first cloth bag (441) and a second cloth bag (442), the second cloth bag (442) being located outside the first cloth bag (441), the bottom end of the second cloth bag (442) being mounted with a cloth bag base (444), the cloth bag base (444) being rotatably mounted on the opening and closing assembly (42), the cloth bag base (444) being rotatably mounted with a dust suppression ring (445), the dust suppression ring (445) being connected to the opening and closing assembly (42).

3. The flue gas desulfurization and denitrification treatment device with self-cleaning function according to claim 2 is characterized in that: The opening and closing assembly (42) comprises a slide connecting rod (422) and a lower gear ring (421); a sliding block (423) is slidably mounted on the slide connecting rod (422); a rotating disk (426) is rotatably mounted on the sliding block (423); a cloth bag base (444) is rotatably mounted on the rotating disk (426); the lower gear ring (421) is mounted in a cleaning housing (41); the lower gear ring (421) and the rotating disk (426) are meshed for transmission; a cylinder (424) is mounted outside the cleaning housing (41); a connecting rod assembly (425) is mounted on an output shaft of the cylinder (424); the connecting rod assembly (425) passes through the cleaning housing (41) and is connected to the lower gear ring (421).

4. The flue gas desulfurization and denitrification treatment device with self-cleaning function according to claim 2 is characterized in that: The flow guide device (43) comprises a second motor (434), the second motor (434) being mounted on the top of a cloth bag bracket (46), a second blade (431) being mounted on the output shaft of the second motor (434), a blade connecting rod (432) being mounted on the bottom end of the second blade (431), an upper gear ring (433) being mounted on the bottom end of the blade connecting rod (432), the upper gear ring (433) being meshed with the cloth bag gear ring (443) for transmission, and the blade connecting rod (432) being an electric telescopic rod.

5. The flue gas desulfurization and denitrification treatment device with self-cleaning function according to claim 2, characterized in that: The vibration assembly (45) comprises a vibration ring (451), a connecting plate (452) and a vibration paddle (455); the vibration ring (451) is mounted on the bottom end of the cloth bag gear ring (443); a plurality of vibration plates (453) are mounted on the vibration ring (451); the vibration paddle (455) is rotatably mounted on the cloth bag bracket (46); the connecting plate (452) is mounted on the cloth bag bracket (46); and a vibration spring (454) is mounted between the connecting plate (452) and the vibration paddle (455).

6. The flue gas desulfurization and denitrification treatment device with self-cleaning function according to claim 3, characterized in that: The sliding block (423) is provided with a cylindrical sliding block, the rotating disk (426) is provided with a sliding groove matching the cylindrical sliding block, the rotating disk (426) is mounted with a plurality of tooth columns, and the lower gear ring (421) and the rotating disk (426) are meshed and transmitted via the tooth columns.

Images