Medium-temperature denitration catalyst anti-blocking device

Abstract

The invention relates to the technical field of anti-blocking devices, in particular to a medium-temperature denitration catalyst anti-blocking device which comprises a first barrel and a first valve, an opening is formed in the top end of the first barrel, and the first valve is arranged on the upper portion of the outer side wall of the first barrel in a communicating mode; the device further comprises an intercepting device, a cleaning device, a supporting device, a second barrel, a second valve, a first discharging pipe, a movable ring and a catalyst layer, the second barrel is arranged at the bottom end of the first barrel in a communicating mode, the second valve is arranged on the outer side wall of the second barrel in a communicating mode, the first discharging pipe is arranged on the lower portion of the first barrel in a communicating mode, and the intercepting device is arranged in the second barrel. The intercepting device is used for filtering large fly ash, and the movable ring is installed in the first barrel in an up-down sliding mode. The device reduces the blockage condition of a catalyst layer, prolongs the cleaning period of the catalyst layer, improves the cleaning effect and efficiency of the catalyst layer, improves the convenience of cleaning treatment, reduces the complexity of personnel maintenance, reduces the shutdown cleaning time, and improves the working efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of anti-clogging devices, and particularly to a medium-temperature denitration catalyst anti-clogging device. Background Art

[0002] In the flue gas denitration technology, the clogging of denitration catalysts is a common problem. Especially in industrial fields such as coal-fired power plants and cement plants, the clogging is mainly caused by the deposition of fly ash and ammonium salts. This not only affects the denitration efficiency but also shortens the service life of the catalysts. To solve this problem, it is particularly important to develop a medium-temperature denitration catalyst anti-clogging device.

[0003] Currently, in existing catalyst anti-clogging equipment, such as the patent with the authorization announcement number CN211753955U, this utility model discloses an SCR denitration catalyst anti-clogging device, belonging to the field of flue gas purification. It is installed in an SCR denitration reactor framework with an air inlet at the upper end and an air outlet at the lower end. A denitration catalyst is arranged at the lower part of the reactor framework. The SCR denitration catalyst anti-clogging device is arranged between the air inlet of the reactor framework and the catalyst, so as to achieve the purpose of anti-clogging.

[0004] However, it is found in the use of this device that although this device can intercept large pieces of fly ash, after long-term use, the denitration catalyst will still be clogged by small particle pollutants, thus affecting the ventilation effect and the denitration efficiency. Summary of the Invention

[0005] To solve the above technical problems, the present invention provides a medium-temperature denitration catalyst anti-clogging device that can reduce the clogging of the catalyst layer, extend the cleaning cycle of the catalyst layer, improve the cleaning effect and efficiency of the catalyst layer, improve the convenience of cleaning treatment, reduce the complexity of personnel maintenance, reduce the downtime for cleaning, and improve the working efficiency.

[0006] A device for preventing blockage of a medium-temperature denitration catalyst of the present invention includes a first cylinder body and a first valve. An opening is provided at the top of the first cylinder body, and the first valve is communicatively arranged on the upper part of the outer side wall of the first cylinder body; it further includes an interception device, a cleaning device, a support device, a second cylinder body, a second valve, a first discharge pipe, a movable ring and a catalyst layer. The second cylinder body is communicatively arranged at the bottom end of the first cylinder body, the second valve is communicatively arranged on the outer side wall of the second cylinder body, the first discharge pipe is communicatively arranged at the lower part of the first cylinder body, the interception device is arranged inside the second cylinder body, and the interception device is used for filtering large chunks of fly ash. Since the interception device filters and processes the flue gas, the situation of blockage of the catalyst layer is reduced, and the cleaning cycle of the catalyst layer is prolonged. The movable ring is slidably installed up and down inside the first cylinder body, and the catalyst layer is installed on the inner side wall of the movable ring. A cleaning device is arranged at the top of the first cylinder body, and the cleaning device is used for backwashing and cleaning the catalyst layer and the interception device, thereby improving the convenience of internal cleaning of the device, reducing the complexity of personnel maintenance, reducing the downtime for cleaning, improving work efficiency, and the cleaning device is used for pressing and fixing the catalyst layer, and the cleaning device is used for closing the opening at the top end of the first cylinder body. The support device is arranged inside the first cylinder body, and the support device is used for elastically supporting the movable ring; the external flue gas enters the inside of the second cylinder body through the second valve, first the large chunks of fly ash in the flue gas are intercepted by the interception device, the filtered flue gas passes through the catalyst layer for denitration treatment, and then the flue gas is discharged outwards through the first valve. When it is necessary to clean the catalyst layer, the cleaning device is started to drive the movable ring to shake up and down. When the movable ring moves downwards, it collides with the support device, so that the dirt on the catalyst layer vibrates and falls off. At the same time, the cleaning device backwashes and cleans the catalyst layer, so that the dust in the catalyst layer is discharged through the first discharge pipe, improving the cleaning effect and efficiency of the catalyst layer. After the cleaning of the catalyst layer is completed, the backwashing air flow backwashes and cleans the interception device again.

[0007] Preferably, the cleaning device includes a moving device, a gas supply device, a driving device, a pressing device, a box body, multiple groups of first telescopic rods, a bracket, a fixture, a kit, an air pipe, a jet pipe, multiple groups of discs and multiple groups of connecting rods. The box body is installed on the upper part of the first cylinder through the moving device. The moving device is used to drive the box body to lift and rotate. Multiple groups of first telescopic rods are arranged between the box body and the bracket. Multiple groups of fixtures are all installed at the bottom of the bracket. The kit is rotatably installed on the box body. The bracket is slidably sleeved outside the kit up and down. The air pipe rotates through the inside of the kit. The jet pipe is communicated and arranged at the bottom end of the air pipe. A gas supply device is arranged inside the box body. The gas supply device communicates with the top end of the air pipe. Multiple groups of discs are rotatably installed on the outer side wall of the kit at an inclined angle. The upper and lower ends of multiple groups of connecting rods are respectively rotatably connected to the outer side walls of multiple groups of discs and the bracket. The driving device is arranged inside the box body. The driving device is used to drive the kit and the air pipe to rotate, and the driving device is used to provide power for the gas supply device. The pressing device is arranged on the outer side wall of the box body. The pressing device is used to press the movable ring; The box body is covered on the top opening of the first cylinder. At this time, multiple groups of fixtures clamp and fix the upper part of the movable ring. When the driving device drives the kit and the air pipe to rotate, the rotation of the kit drives multiple groups of discs to swing, so that multiple groups of discs drive the bracket to move up and down through multiple groups of connecting rods, so that the bracket drives the movable ring to slide up and down, and then vibrates and cleans the catalyst layer. After the driving device operates, it simultaneously provides power for the gas supply device, so that the gas supply device transports compressed air into the air pipe, and then blows and cleans the catalyst layer through the jet pipe, so as to improve the vibration cleaning and back blowing cleaning of the catalyst layer and improve the working efficiency.

[0008] Preferably, the gas supply device includes a delivery box, a tank body, a cylinder body, a piston, a connecting arm, a first one-way valve and a second one-way valve. The delivery box, the tank body and the cylinder body are all installed on the inner side wall of the box body. The upper part of the air pipe rotates and extends into the delivery box, and the air pipe communicates with the inside of the delivery box. The output end of the tank body is communicated with the delivery box. The piston is slidably installed inside the cylinder body. The end of the connecting arm is rotatably connected to the piston. The other end of the connecting arm is rotatably connected to the driving device. The first one-way valve and the second one-way valve are respectively communicated and arranged on the cylinder body. The output end of the second one-way valve is communicated with the tank body; The driving device drives the piston to slide through the connecting arm. After the piston slides, it extracts outdoor air through the first one-way valve, and then transports the extracted air into the tank body through the second one-way valve. Then the tank body transports compressed air into the delivery box, so that the delivery box transports air into the air pipe, and the jet pipe blows and cleans the catalyst layer, improving the operation efficiency.

[0009] Preferably, the interception device includes a first chassis, a first motor, a hydraulic cylinder, a filter screen, a vertical rod, a baffle, a brush, and a second discharge pipe. The first motor is installed on the inner side wall of the first chassis. There are multiple groups of hydraulic cylinders arranged between the bottom end of the second cylinder body and the top end of the first chassis. The filter screen is installed on the inner side wall of the second cylinder body. The vertical rod slides through the filter screen, and the bottom end of the vertical rod is connected to the output end of the first motor. The baffle is installed at the top end of the vertical rod, the brush is installed on the outer side wall of the vertical rod, and the second discharge pipe is communicatively arranged on the outer side wall of the second cylinder body. In the ventilation state, multiple groups of hydraulic cylinders drive the first chassis to move upward, so that the first chassis drives the baffle to move upward through the vertical rod. At this time, the top end of the second cylinder body communicates with the inside of the first cylinder body, and large chunks of fly ash in the flue gas entering the first cylinder body are intercepted by the filter screen. When the catalyst layer is backflushed and cleaned, the baffle is moved downward into the second cylinder body, so that the baffle seals the second cylinder body, facilitating the discharge of the dirt backflushed in the first cylinder body from the first discharge pipe. After the backflushing of the catalyst layer is completed, the second valve is closed, the second discharge pipe is opened, and the baffle is moved upward. At this time, the air in the first cylinder body enters the inside of the second cylinder body to backflush the filter screen, and the dirt backflushed from the filter screen is discharged through the second discharge pipe. At the same time, since the vertical rod drives the brush to contact the bottom of the filter screen after moving upward, the first motor drives the vertical rod to rotate, so that the vertical rod drives the brush to clean the bottom of the filter screen, improving the cleaning effect of the filter screen, improving the convenience of backflushing and cleaning different positions inside the device, and improving the maintenance convenience.

[0010] Preferably, the driving device includes a second motor, four groups of first gears, and a second gear. The second motor is installed on the inner side wall of the box body. Two of the first gears are respectively arranged on the upper and lower output ends of the second motor, and the other two first gears are respectively installed on the outer side walls of the kit and the air pipe. The first gears on the kit and the air pipe mesh with the two first gears at the output end of the second motor. The second gear is rotatably installed on the inner side wall of the box body, and the second gear meshes with one of the first gears. The end of the connecting arm is rotatably installed at the eccentric position of the second gear. By starting the second motor, the second motor drives the kit and the air pipe to rotate through the four groups of first gears. After the air pipe rotates, it drives the air injection pipe to rotate, so that the air injection pipe backflushes different positions of the catalyst layer, improving the cleaning effect of the catalyst layer. After the first gear rotates, it drives the second gear to rotate, so that the second gear drives the piston to slide through the connecting arm, improving the convenience of supplying gas to the air injection pipe.

[0011] Preferably, the mobile device includes two sets of hydraulic telescopic arms, two sets of second chassis, and two sets of third motors. The two sets of hydraulic telescopic arms are respectively installed on the outer side wall of the first cylinder body. The two sets of second chassis are respectively installed on the mobile ends of the two sets of hydraulic telescopic arms. The two sets of third motors are respectively installed on the inner side walls of the two sets of second chassis. The box body is rotatably installed on the outer side wall of the second chassis. The output ends of the two sets of third motors are concentrically connected to the box body. The two sets of hydraulic telescopic arms drive the two sets of second chassis to move upward, so that the two sets of second chassis drive the box body to move upward, thereby facilitating the box body to move the movable ring and the catalyst layer upward out of the first cylinder body, improving the convenience of replacing the catalyst layer. When the second valve is separated from the movable ring, after the box body moves upward and is completed, the box body is flipped by the third motor, so that the pressing device faces the top of the movable ring. Then, by moving the box body downward to reset, the pressing device presses and fixes the top of the movable ring, improving the convenience of fixing the movable ring, while reducing the pollution and damage of the flue gas to the second valve during the operation of the device, and improving the service life.

[0012] Preferably, the pressing device includes multiple sets of second telescopic rods and multiple sets of first springs. The multiple sets of second telescopic rods are all installed on the outer side wall of the box body. The multiple sets of first springs are respectively sleeved on the multiple sets of second telescopic rods in a matching manner. The box body drives the multiple sets of second telescopic rods to penetrate deeply into the first cylinder body, so that the multiple sets of second telescopic rods and the multiple sets of first springs elastically press the movable ring, improving the positioning effect of the catalyst layer.

[0013] Preferably, the supporting device includes a supporting ring, multiple sets of third telescopic rods, and multiple sets of second springs. The bottom end of the supporting ring is installed on the inner side wall of the first cylinder body through the multiple sets of third telescopic rods. The multiple sets of second springs are respectively sleeved on the multiple sets of third telescopic rods in a matching manner. The multiple sets of third telescopic rods and the multiple sets of second springs elastically support the supporting ring, so that the supporting ring supports and vibrates the catalyst layer.

[0014] Preferably, it further includes a sealing ring, and the sealing ring is arranged at the opening at the top end of the first cylinder body. By setting the sealing ring, the sealing effect between the box body and the first cylinder body is improved.

[0015] Preferably, an observation port is arranged on the outer side wall of the first cylinder body. By setting the observation port, it is convenient to observe the cleaning state of the catalyst layer, and it is convenient to clean and maintain the catalyst layer in time.

[0016] The beneficial effects of the present invention compared with the prior art are as follows: Since the interception device filters and processes the flue gas, the situation of blockage of the catalyst layer is reduced, and the cleaning cycle of the catalyst layer is extended. When it is necessary to clean the catalyst layer, the cleaning device is started to drive the movable ring to shake up and down. When the movable ring moves downward, it collides with the support device, so that the dirt on the catalyst layer vibrates and falls off. At the same time, the cleaning device blows and cleans the catalyst layer, so that the dust in the catalyst layer is discharged through the first discharge pipe, improving the cleaning effect and efficiency of the catalyst layer. After the catalyst layer is cleaned, the reverse blowing air flow blows and cleans the interception device, thereby improving the convenience of internal cleaning treatment of the device, reducing the complexity of personnel maintenance, reducing the downtime for cleaning, and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is an isometric structural schematic diagram of the present invention; Figure 2 is an isometric structural schematic diagram of the connection between the first cylinder body and the second cylinder body, etc.; Figure 3 is an isometric partial structural schematic diagram of the connection between the second telescopic rod and the box body, etc.; Figure 4 is an isometric partial structural schematic diagram of the connection between the first cylinder body and the sealing ring, etc.; Figure 5 is an isometric partial structural schematic diagram of the connection between the box body and the conveying box, etc.; Figure 6 is an isometric partial structural schematic diagram of the connection between the box body and the tank body, etc.; Figure 7 is an isometric partial structural schematic diagram of the connection between the vertical rod and the baffle, etc.; Figure 8 is an isometric partial structural schematic diagram of the connection between the movable ring and the catalyst layer, etc.; Figure 9 is an isometric partial structural schematic diagram of the connection between the first cylinder body and the hydraulic telescopic arm, etc.; Figure 10 is an isometric partial structural schematic diagram of the connection between the first cylinder body and the first discharge pipe, etc.; Figure 11 is an isometric partial structural schematic diagram of the connection between the first telescopic rod and the bracket, etc.; Figure 12 is an isometric partial structural schematic diagram of the connection between the second cylinder body and the filter screen, etc.

[0018] Reference numerals in the drawings: 101, first cylinder; 102, first valve; 103, second cylinder; 104, second valve; 105, first discharge pipe; 106, movable ring; 107, catalyst layer; 201, box body; 202, first telescopic rod; 203, bracket; 204, clamp; 205, kit; 206, air pipe; 207, air injection pipe; 208, disc; 209, connecting rod; 301, conveying box; 302, tank body; 303, cylinder block; 304, piston; 305, connecting arm; 306, first one-way valve; 307, second one-way valve; 401, first chassis; 402, first motor; 403, hydraulic cylinder; 404, filter screen; 405, vertical rod; 406, baffle; 407, brush; 408, second discharge pipe; 501, second motor; 502, first gear; 503, second gear; 601, hydraulic telescopic arm; 602, second chassis; 603, third motor; 701, second telescopic rod; 702, first spring; 801, support ring; 802, third telescopic rod; 803, second spring; 901, sealing ring. Detailed implementation manners

[0019] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present invention more thorough and comprehensive.

[0020] Embodiment 1 As Figures 1 to 12 shown, a medium-temperature denitration catalyst anti-blocking device of the present invention includes a first cylinder 101 and a first valve 102. An opening is provided at the top end of the first cylinder 101, and the first valve 102 is communicatively provided on the upper part of the outer side wall of the first cylinder 101. It further includes an interception device, a cleaning device, a support device, a second cylinder 103, a second valve 104, a first discharge pipe 105, a movable ring 106 and a catalyst layer 107. The second cylinder 103 is communicatively provided at the bottom end of the first cylinder 101, the second valve 104 is communicatively provided on the outer side wall of the second cylinder 103, the first discharge pipe 105 is communicatively provided at the lower part of the first cylinder 101. An interception device is provided in the second cylinder 103, and the interception device is used to filter large chunks of fly ash. The movable ring 106 is slidably installed up and down inside the first cylinder 101, and the catalyst layer 107 is installed on the inner side wall of the movable ring 106. A cleaning device is provided at the top of the first cylinder 101. The cleaning device is used to blow and clean the catalyst layer 107 and the interception device, and the cleaning device is used to press and fix the catalyst layer 107, and the cleaning device is used to close the opening at the top end of the first cylinder 101. The support device is provided inside the first cylinder 101, and the support device is used to elastically support the movable ring 106; The cleaning device includes a moving device, a gas supply device, a driving device, a pressing device, a box body 201, multiple groups of first telescopic rods 202, a bracket 203, a clamp 204, a kit 205, an air pipe 206, a jet pipe 207, multiple groups of discs 208 and multiple groups of connecting rods 209. The box body 201 is installed on the upper part of the first cylinder 101 through the moving device. The moving device is used to drive the box body 201 to lift and rotate. Multiple groups of first telescopic rods 202 are arranged between the box body 201 and the bracket 203. Multiple groups of clamps 204 are all installed at the bottom of the bracket 203. The kit 205 is rotatably installed on the box body 201. The bracket 203 is slidably sleeved outside the kit 205 up and down. The air pipe 206 rotatably passes through the inside of the kit 205. The jet pipe 207 is communicatively arranged at the bottom end of the air pipe 206. A gas supply device is arranged inside the box body 201. The gas supply device communicates with the top end of the air pipe 206. Multiple groups of discs 208 are rotatably installed on the outer side wall of the kit 205 at an inclined angle. The upper and lower ends of multiple groups of connecting rods 209 are respectively rotatably connected to the outer side walls of multiple groups of discs 208 and the bracket 203. The driving device is arranged inside the box body 201. The driving device is used to drive the kit 205 and the air pipe 206 to rotate, and the driving device is used to provide power for the gas supply device. The pressing device is arranged on the outer side wall of the box body 201. The pressing device is used to press the movable ring 106; In this embodiment, the external flue gas enters the inside of the second cylinder 103 through the second valve 104. First, the large fly ash in the flue gas is intercepted by the interception device. The filtered flue gas passes through the catalyst layer 107 for denitrification treatment. Then the flue gas is discharged outward through the first valve 102. Since the interception device filters the flue gas, the situation of blockage of the catalyst layer 107 is reduced, and the cleaning cycle of the catalyst layer 107 is prolonged. When it is necessary to clean the catalyst layer 107, the cleaning device is started to drive the movable ring 106 to shake up and down. When the movable ring 106 moves downward, it collides with the support device, so that the dirt on the catalyst layer 107 vibrates and falls off. At the same time, the cleaning device blows and cleans the catalyst layer 107, so that the dust in the catalyst layer 107 is discharged through the first discharge pipe 105, improving the cleaning effect and efficiency of the catalyst layer 107. After the cleaning of the catalyst layer 107 is completed, the reverse blowing air flow blows and cleans the interception device again, thereby improving the convenience of internal cleaning treatment of the device, reducing the complexity of personnel maintenance, reducing the downtime for cleaning, and improving the work efficiency.

[0021] Embodiment 2 Based on Embodiment 1, the air supply device includes a delivery box 301, a tank body 302, a cylinder block 303, a piston 304, a connecting arm 305, a first one-way valve 306, and a second one-way valve 307. The delivery box 301, the tank body 302, and the cylinder block 303 are all installed on the inner side wall of the box body 201. The upper part of the air pipe 206 rotates and extends into the delivery box 301, and the air pipe 206 communicates with the inside of the delivery box 301. The output end of the tank body 302 is communicated with the delivery box 301. The piston 304 is slidably installed inside the cylinder block 303. The end of the connecting arm 305 is rotatably connected to the piston 304, and the other end of the connecting arm 305 is rotatably connected to the driving device. The first one-way valve 306 and the second one-way valve 307 are respectively and communicatively arranged on the cylinder block 303, and the output end of the second one-way valve 307 is communicated with the tank body 302; The driving device includes a second motor 501, four groups of first gears 502, and a second gear 503. The second motor 501 is installed on the inner side wall of the box body 201. Two of the first gears 502 are respectively arranged on the output ends of the upper and lower parts of the second motor 501, and the other two groups of first gears 502 are respectively installed on the outer side walls of the kit 205 and the air pipe 206. The first gears 502 on the kit 205 and the air pipe 206 mesh with the two first gears 502 at the output end of the second motor 501. The second gear 503 is rotatably installed on the inner side wall of the box body 201, and the second gear 503 meshes with one of the first gears 502. The end of the connecting arm 305 is rotatably installed at an eccentric position of the second gear 503; The moving device includes two groups of hydraulic telescopic arms 601, two groups of second chassis 602, and two groups of third motors 603. The two groups of hydraulic telescopic arms 601 are respectively installed on the outer side wall of the first cylinder 101. The two groups of second chassis 602 are respectively installed on the moving ends of the two groups of hydraulic telescopic arms 601. The two groups of third motors 603 are respectively installed on the inner side walls of the two groups of second chassis 602. The box body 201 is rotatably installed on the outer side wall of the second chassis 602, and the output ends of the two groups of third motors 603 are concentrically connected to the box body 201; The pressing device includes multiple groups of second telescopic rods 701 and multiple groups of first springs 702. The multiple groups of second telescopic rods 701 are all installed on the outer side wall of the box body 201, and the multiple groups of first springs 702 are respectively sleeved on the multiple groups of second telescopic rods 701 in a matching manner; The supporting device includes a support ring 801, multiple groups of third telescopic rods 802, and multiple groups of second springs 803. The bottom end of the support ring 801 is installed on the inner side wall of the first cylinder 101 through multiple groups of third telescopic rods 802, and the multiple groups of second springs 803 are respectively sleeved on the multiple groups of third telescopic rods 802 in a matching manner; It further includes a sealing ring 901, and the sealing ring 901 is arranged at the top opening of the first cylinder 101; An observation port is provided on the outer side wall of the first cylinder 101; In this embodiment, the box body 201 is covered on the top opening of the first cylinder body 101. At this time, multiple groups of jigs 204 clamp and fix the upper part of the movable ring 106. When the driving device drives the kit 205 and the air pipe 206 to rotate, the rotation of the kit 205 drives multiple groups of discs 208 to swing, so that the multiple groups of discs 208 drive the bracket 203 to move up and down through multiple groups of connecting rods 209, thereby driving the movable ring 106 to slide up and down by the bracket 203, and then vibrating and cleaning the catalyst layer 107. After the driving device operates, it provides power to the air supply device at the same time, so that the air supply device conveys compressed air into the air pipe 206, and then blows and cleans the catalyst layer 107 through the air injection pipe 207, thereby improving the vibration cleaning and reverse blowing cleaning of the catalyst layer 107 at the same time, and improving the working efficiency. The driving device drives the piston 304 to slide through the connecting arm 305. After the piston 304 slides, it extracts outdoor air through the first one-way valve 306, and then conveys the extracted air into the interior of the tank body 302 through the second one-way valve 307. After that, the tank body 302 conveys compressed air into the interior of the delivery box 301, so that the delivery box 301 conveys air into the air pipe 206, and the air injection pipe 207 blows and cleans the catalyst layer 107, improving the operation efficiency.

[0022] Embodiment 3 Based on Embodiment 1, the interception device includes a first chassis 401, a first motor 402, a hydraulic cylinder 403, a filter screen 404, a vertical rod 405, a baffle 406, a brush 407, and a second discharge pipe 408. The first motor 402 is installed on the inner side wall of the first chassis 401. A plurality of hydraulic cylinders 403 are provided between the bottom end of the second cylinder 103 and the top end of the first chassis 401. The filter screen 404 is installed on the inner side wall of the second cylinder 103. The vertical rod 405 slides through the filter screen 404. The bottom end of the vertical rod 405 is connected to the output end of the first motor 402. The baffle 406 is installed at the top end of the vertical rod 405. The brush 407 is installed on the outer side wall of the vertical rod 405. The second discharge pipe 408 is communicated and provided on the outer side wall of the second cylinder 103. In the ventilation state, a plurality of hydraulic cylinders 403 drive the first chassis 401 to move upward, so that the first chassis 401 drives the baffle 406 to move upward through the vertical rod 405. At this time, the top end of the second cylinder 103 is communicated with the inside of the first cylinder 101. Large fly ash in the flue gas entering the first cylinder 101 is intercepted through the filter screen 404. When the catalyst layer 107 is backflushed and cleaned, the baffle 406 is moved downward into the second cylinder 103, so that the baffle 406 seals the second cylinder 103, facilitating the discharge of the dirt backflushed in the first cylinder 101 from the first discharge pipe 105. After the backflushing of the catalyst layer 107 is completed, the second valve 104 is closed, the second discharge pipe 408 is opened, and the baffle 406 is moved upward. At this time, the air in the first cylinder 101 enters the second cylinder 103 to backflush the filter screen 404. The dirt backflushed by the filter screen 404 is discharged through the second discharge pipe 408. At the same time, since the vertical rod 405 drives the brush 407 to contact the bottom of the filter screen 404 after moving upward, the first motor 402 drives the vertical rod 405 to rotate, so that the vertical rod 405 drives the brush 407 to clean the bottom of the filter screen 404, improving the cleaning effect of the filter screen 404, improving the convenience of backflushing and cleaning different positions inside the device, and improving the maintenance convenience.

[0023] As Figures 1 to 12 shown, in a medium-temperature denitration catalyst anti-blocking device of the present invention, during operation, external flue gas enters the inside of the second cylinder 103 through the second valve 104. First, large fly ash in the flue gas is intercepted by the interception device. The filtered flue gas passes through the catalyst layer 107 for denitration treatment, and then the flue gas is discharged outward through the first valve 102. When it is necessary to clean the catalyst layer 107, the cleaning device is started to drive the movable ring 106 to swing up and down. When the movable ring 106 moves downward, it collides with the support device, so that the dirt on the catalyst layer 107 vibrates and falls off. At the same time, the cleaning device backflushes and cleans the catalyst layer 107, so that the dust in the catalyst layer 107 is discharged through the first discharge pipe 105. After the cleaning of the catalyst layer 107 is completed, the backflushing airflow backflushes and cleans the interception device.

[0024] The main functions achieved by the present invention are as follows: 1. Since the interception device filters and processes the flue gas, the clogging of the catalyst layer 107 is reduced, and the cleaning cycle of the catalyst layer 107 is extended; 2. By vibrating and backwashing the catalyst layer 107 simultaneously, the cleaning effect and efficiency of the catalyst layer 107 are improved; 3. After the backwashing of the catalyst layer 107 is completed, the second valve 104 is closed, the second discharge pipe 408 is opened, and the baffle 406 is moved upward. At this time, the air in the first cylinder 101 enters the inside of the second cylinder 103 to backwash the filter screen 404. The dirt backwashed from the filter screen 404 is discharged through the second discharge pipe 408. At the same time, since the vertical rod 405 drives the brush 407 to contact the bottom of the filter screen 404 after moving upward, the first motor 402 drives the vertical rod 405 to rotate, so that the vertical rod 405 drives the brush 407 to clean the bottom of the filter screen 404, improving the cleaning effect on the filter screen 404; 4. The box body 201 is flipped by the third motor 603, so that the pressing device faces the top of the movable ring 106, and then the box body 201 is moved downward to reset, so that the pressing device presses and fixes the top of the movable ring 106, improving the convenience of fixing the movable ring 106, and at the same time reducing the pollution and damage of the flue gas to the second valve 104 during the operation of the device, and improving the service life.

[0025] The first motor 402, hydraulic cylinder 403, second motor 501, hydraulic telescopic arm 601 and third motor 603 of the medium-temperature denitration catalyst anti-clogging device of the present invention are purchased on the market. Those skilled in the art only need to install and operate according to the attached operation manual, without the need for creative labor from those skilled in the art.

[0026] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art in the technical field, without departing from the technical principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A device for preventing blockage of a medium-temperature denitration catalyst, comprising a first cylinder body (101) and a first valve (102). The top of the first cylinder body (101) is provided with an opening, and the first valve (102) is communicatively arranged on the upper part of the outer side wall of the first cylinder body (101); characterized in that, It also includes an interception device, a cleaning device, a support device, a second cylinder (103), a second valve (104), a first discharge pipe (105), a movable ring (106), and a catalyst layer (107). The second cylinder (103) is communicatively provided at the bottom end of the first cylinder (101). The second valve (104) is communicatively provided on the outer side wall of the second cylinder (103). The first discharge pipe (105) is communicatively provided at the lower part of the first cylinder (101). An interception device is provided inside the second cylinder (103), and the interception device is used to filter large chunks of fly ash. The movable ring (106) is slidably mounted up and down inside the first cylinder (101). The catalyst layer (107) is mounted on the inner side wall of the movable ring (106). A cleaning device is provided at the top of the first cylinder (101). The cleaning device is used to backflush and clean the catalyst layer (107) and the interception device, and the cleaning device is used to press and fix the catalyst layer (107), and the cleaning device is used to close the top opening of the first cylinder (101). The support device is provided inside the first cylinder (101), and the support device is used to elastically support the movable ring (106).

2. The anti-clogging device for medium-temperature denitration catalyst according to claim 1, characterized in that, The cleaning device includes a moving device, a gas supply device, a driving device, a pressing device, a box body (201), multiple groups of first telescopic rods (202), a bracket (203), a clamp (204), a kit (205), a trachea (206), a jet pipe (207), multiple groups of discs (208), and multiple groups of connecting rods (209). The box body (201) is mounted on the upper part of the first cylinder (101) through the moving device. The moving device is used to drive the box body (201) to lift and rotate. Multiple groups of first telescopic rods (202) are provided between the box body (201) and the bracket (203). Multiple groups of clamps (204) are all mounted at the bottom of the bracket (203). The kit (205) is rotatably mounted on the box body (201). The bracket (203) is slidably sleeved outside the kit (205) up and down. The trachea (206) rotatably passes through the inside of the kit (205). The jet pipe (207) is communicatively provided at the bottom end of the trachea (206). A gas supply device is provided inside the box body (201), and the gas supply device communicates with the top end of the trachea (206). Multiple groups of discs (208) are rotatably mounted on the outer side wall of the kit (205) at an inclined angle. The upper and lower ends of multiple groups of connecting rods (209) are respectively rotatably connected to the outer side walls of multiple groups of discs (208) and the bracket (203). The driving device is provided inside the box body (201). The driving device is used to drive the kit (205) and the trachea (206) to rotate, and the driving device is used to provide power for the gas supply device. The pressing device is provided on the outer side wall of the box body (201), and the pressing device is used to press the movable ring (106).

3. The anti-clogging device for medium-temperature denitration catalyst according to claim 2, characterized in that, The air supply device includes a delivery box (301), a tank body (302), a cylinder block (303), a piston (304), a connecting arm (305), a first one-way valve (306) and a second one-way valve (307). The delivery box (301), the tank body (302) and the cylinder block (303) are all installed on the inner side wall of the box body (201). The upper part of the air pipe (206) rotatably extends into the delivery box (301), and the air pipe (206) is communicated with the inside of the delivery box (301). The output end of the tank body (302) is communicated with the delivery box (301). The piston (304) is slidably installed inside the cylinder block (303). The end of the connecting arm (305) is rotatably connected to the piston (304). The other end of the connecting arm (305) is rotatably connected to the driving device. The first one-way valve (306) and the second one-way valve (307) are respectively and communicatively arranged on the cylinder block (303). The output end of the second one-way valve (307) is communicated with the tank body (302).

4. The anti-clogging device for a medium-temperature denitration catalyst according to claim 1, wherein, The interception device includes a first chassis (401), a first motor (402), a hydraulic cylinder (403), a filter screen (404), a vertical rod (405), a baffle (406), a brush (407) and a second discharge pipe (408). The first motor (402) is installed on the inner side wall of the first chassis (401). A plurality of hydraulic cylinders (403) are arranged between the bottom end of the second cylinder body (103) and the top end of the first chassis (401). The filter screen (404) is installed on the inner side wall of the second cylinder body (103). The vertical rod (405) slidably passes through the filter screen (404). The bottom end of the vertical rod (405) is connected to the output end of the first motor (402). The baffle (406) is installed at the top end of the vertical rod (405). The brush (407) is installed on the outer side wall of the vertical rod (405). The second discharge pipe (408) is communicatively arranged on the outer side wall of the second cylinder body (103).

5. The anti-clogging device for a medium-temperature denitration catalyst according to claim 2, characterized in that, The driving device includes a second motor (501), four first gears (502) and a second gear (503). The second motor (501) is installed on the inner side wall of the box body (201). Two of the first gears (502) are respectively arranged on the upper and lower output ends of the second motor (501). The other two first gears (502) are respectively installed on the outer side walls of the kit (205) and the air pipe (206). The first gears (502) on the kit (205) and the air pipe (206) are meshed with the two first gears (502) at the output end of the second motor (501). The second gear (503) is rotatably installed on the inner side wall of the box body (201). The second gear (503) is meshed with one of the first gears (502). The end of the connecting arm (305) is rotatably installed at an eccentric position of the second gear (503).

6. The anti-clogging device for medium-temperature denitration catalyst according to claim 2, wherein, The mobile device includes two sets of hydraulic telescopic arms (601), two sets of second chassis (602) and two sets of third motors (603). The two sets of hydraulic telescopic arms (601) are respectively installed on the outer side wall of the first cylinder (101). The two sets of second chassis (602) are respectively installed on the mobile ends of the two sets of hydraulic telescopic arms (601). The two sets of third motors (603) are respectively installed on the inner side walls of the two sets of second chassis (602). The box body (201) is rotatably installed on the outer side wall of the second chassis (602). The output ends of the two sets of third motors (603) are concentrically connected to the box body (201).

7. The anti-clogging device for medium-temperature denitration catalyst according to claim 2, characterized in that, The pressing device includes multiple sets of second telescopic rods (701) and multiple sets of first springs (702). The multiple sets of second telescopic rods (701) are all installed on the outer side wall of the box body (201). The multiple sets of first springs (702) are respectively sleeved on the multiple sets of second telescopic rods (701) in a matching manner.

8. The anti-clogging device for medium-temperature denitration catalyst according to claim 1, characterized in that, The supporting device includes a support ring (801), multiple sets of third telescopic rods (802) and multiple sets of second springs (803). The bottom end of the support ring (801) is installed on the inner side wall of the first cylinder (101) through the multiple sets of third telescopic rods (802). The multiple sets of second springs (803) are respectively sleeved on the multiple sets of third telescopic rods (802) in a matching manner.

9. The anti-clogging device for medium-temperature denitration catalyst according to claim 1, characterized in that, It further includes a sealing ring (901). The sealing ring (901) is arranged at the top opening of the first cylinder (101).

10. The anti-clogging device for a medium-temperature denitration catalyst according to claim 1, characterized in that, An observation port is provided on the outer side wall of the first cylinder (101).

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