SCR (Selective Catalytic Reduction) external denitration pulse shock wave ash removal structure

Abstract

The utility model discloses an SCR furnace external denitration pulse shock wave ash removal structure which comprises an air storage tank, an ash removal air pipe is connected to the air storage tank, an adjustable pulse mechanism is arranged at the bottom of the ash removal air pipe, a mounting mechanism is arranged on the outer side of the air storage tank, the adjustable pulse mechanism comprises a fixed seat, an electric sliding rail is fixedly connected to the interior of the fixed seat, and a pulse shock wave is arranged on the electric sliding rail. And an electric push rod is installed on the electric sliding rail, and the end of an output shaft of the electric push rod is fixedly connected with a lifting seat. According to the denitration pulse shock wave ash removal structure outside the SCR furnace, a driving gear is moved and meshed between driven gears with different diameters through an electric sliding rail to change the pulse frequency, then a driving motor drives a movable plug to continuously move up and down to be in contact with and separated from a port of an ash removal air pipe, and compressed air is discharged from the ash removal air pipe in a pulse mode; and the pulse frequency can be adjusted according to actual use requirements, so that the use flexibility and convenience are effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of SCR furnaces, in particular to a pulse shock wave soot cleaning structure for denitrification outside an SCR furnace. Background Technique

[0002] The pulse soot cleaning device for denitrification outside the SCR furnace can blow compressed air in the form of pulses onto the surface of the catalyst for soot cleaning. In the prior art, the pulse frequency of the device is fixed and it is difficult to effectively adjust according to the actual situation, resulting in less than ideal flexibility and convenience in use.

[0003] For example, the patent publication number CN117983054A, specifically a pulse soot cleaning device for SCR denitrification and an SCR denitrification reactor. The soot cleaning device is used for soot cleaning of the denitrification catalyst and includes a gas storage tank, a soot cleaning air pipe, and a soot cleaning nozzle connected in sequence. The gas storage tank supplies gas to the soot cleaning nozzle through the soot cleaning air pipe. The soot cleaning nozzle is arranged outside the denitrification catalyst in a direction perpendicular to the laying direction of the denitrification catalyst. The soot cleaning nozzle includes a wind guiding wall close to the windward surface of the denitrification catalyst, and the wind guiding wall is parallel to the windward surface of the denitrification catalyst, so that the airflow ejected from the soot cleaning nozzle is parallel to the windward surface of the denitrification catalyst under the guidance of the wind guiding wall. The SCR denitrification pulse soot cleaning device also includes a control valve, and the control valve is used to control the opening and closing of the soot cleaning nozzle for blowing air or stopping blowing air, so that the soot cleaning nozzle generates a pulsed airflow, which can greatly reduce the amount of compressed air required for soot cleaning, has low energy consumption and is more energy-saving, and will not cause damage to the denitrification catalyst. There is a problem that the pulse frequency of this device is fixed and it is difficult to effectively adjust according to the actual situation, resulting in less than ideal flexibility and convenience in use. Summary of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a pulse shock wave soot cleaning structure for denitrification outside an SCR furnace, which solves the problem that the pulse frequency of the device is fixed and it is difficult to effectively adjust according to the actual situation, resulting in less than ideal flexibility and convenience in use.

[0005] To achieve the above object, the utility model is realized through the following technical solutions: A pulse shock wave soot cleaning structure for denitrification outside an SCR furnace, including a gas storage tank, a soot cleaning air pipe is connected to the gas storage tank, an adjustable pulse mechanism is arranged at the bottom of the soot cleaning air pipe, and a mounting mechanism is arranged outside the gas storage tank;

[0006] The adjustable pulse mechanism includes a fixed seat, inside which an electric slide rail is fixedly connected. An electric push rod is installed on the electric slide rail. The end of the output shaft of the electric push rod is fixedly connected with a lifting seat. Inside the lifting seat, a driving gear is rotatably connected. The end of the driving gear is fixedly connected with a driving motor. At the bottom of the driving gear, there is a support shaft, on which a first driven gear and a second driven gear are fixedly connected. The end of the support shaft is fixedly connected with a rotating disc. At the top of the dust cleaning air pipe, a support seat is fixedly connected. Inside the support seat, a guide rod is fixedly connected. A movable plug is slidably connected on the guide rod. The top of the movable plug is fixedly connected with a movable rod. Between the top of the movable rod and the eccentric part of the rotating disc, there is a rocker arm, and both ends of the rocker arm are fixedly connected with connecting sleeves.

[0007] Preferably, the fixed seat is fixedly installed on the top of the gas storage tank, and there is a sealing ring between the fixed seat and the gas storage tank. The fixed seat is detachably connected to the gas storage tank, so that the interior can be conveniently overhauled and the airtightness can be increased.

[0008] Preferably, one end of the support shaft is rotatably connected to the inner wall of the gas storage tank, and the end of the support shaft away from the gas storage tank is fixedly connected to the rotating disc, so that the support shaft can rotate and can play a good supporting role for the rotating disc.

[0009] Preferably, the diameter of the first driven gear is larger than that of the second driven gear, and both the first driven gear and the second driven gear are matched with the driving gear, so that the driving gear meshes with the first driven gear and the second driven gear respectively, thereby being able to change the rotation speed of the support shaft to change the pulse frequency.

[0010] Preferably, the top of the movable rod penetrates through the support seat, and both ends of the rocker arm are respectively rotatably connected to the eccentric part of the rotating disc and the end of the movable rod through the connecting sleeves, so that the rotating disc can drive the movable rod to move up and down through the rocker arm and the connecting sleeves.

[0011] Preferably, a return spring is sleeved on the guide rod, and both ends of the return spring are fixedly connected to the bottom surface of the support seat and the top surface of the movable plug respectively, so that the movable plug can be reset by using the return spring, and it can seal the dust cleaning air pipe.

[0012] Preferably, the installation mechanism includes a fixing plate, on which there are a plurality of fixing bolts. The end of the fixing plate is fixedly connected with a support rod, and the end of the support rod is fixedly connected with a first mounting bracket. There is a second mounting bracket on one side of the first mounting bracket. Between the first mounting bracket and the second mounting bracket, there are a plurality of mounting bolts and mounting nuts. A limiting block is fixedly connected to the gas storage tank, which can facilitate the disassembly and overhaul of the gas storage tank.

[0013] The utility model provides a pulse shock wave soot cleaning structure for SCR denitration outside the furnace. Compared with the prior art, it has the following beneficial effects:

[0014] 1. In this pulse shock wave soot cleaning structure for SCR denitration outside the furnace, the driving gear is moved and engaged between driven gears with different diameters through an electric slide rail to change the pulse frequency. Then, the driving motor drives the movable plug to continuously move up and down to contact and separate from the port of the soot cleaning air pipe, and the compressed air is discharged from the soot cleaning air pipe in the form of pulses, and the pulse frequency can be adjusted according to the actual use requirements, effectively improving the flexibility and convenience of use.

[0015] 2. In this pulse shock wave soot cleaning structure for SCR denitration outside the furnace, the air storage tank is placed on the first mounting bracket and supported by the limit block. Then, the second mounting bracket is leaned against the first mounting bracket and fixed with mounting bolts and mounting nuts, which can facilitate the disassembly and maintenance of the air storage tank. Description of the Drawings

[0016] Figure 1 is the overall structural schematic diagram of the utility model;

[0017] Figure 2 is the structural schematic diagram of the adjustable pulse mechanism of the utility model;

[0018] Figure 3 is the connection structural schematic diagram between the electric slide rail and the support shaft of the utility model;

[0019] Figure 4 is the structural schematic diagram of the mounting mechanism of the utility model.

[0020] In the figure: 1. Air storage tank; 2. Adjustable pulse mechanism; 201. Fixed seat; 202. Electric slide rail; 203. Electric push rod; 204. Lifting seat; 205. Driving gear; 206. Driving motor; 207. Support shaft; 208. First driven gear; 209. Second driven gear; 210. Rotating disc; 211. Support seat; 212. Guide rod; 213. Movable plug; 214. Rocker arm; 215. Connecting sleeve; 216. Movable rod; 3. Soot cleaning air pipe; 4. Mounting mechanism; 401. Fixed plate; 402. Fixed bolt; 403. Support rod; 404. Limit block; 405. First mounting bracket; 406. Second mounting bracket; 407. Mounting nut; 408. Mounting bolt. Detailed Embodiment

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0022] Please refer to Figures 1-3 , the present invention provides a technical solution: a pulse shock wave soot cleaning structure for SCR denitrification outside the furnace, which includes a gas storage tank 1. A soot cleaning gas pipe 3 is connected to the gas storage tank 1. An adjustable pulse mechanism 2 is provided at the bottom of the soot cleaning gas pipe 3. An installation mechanism 4 is provided outside the gas storage tank 1. The compressed air can be blown onto the surface of the catalyst in the form of pulses through the adjustable pulse mechanism 2 for cleaning, and at the same time, the pulse frequency can be adjusted according to the actual use requirements, effectively improving the flexibility and convenience of use.

[0023] The adjustable pulse mechanism 2 includes a fixed seat 201 which is fixedly installed on the top of the gas storage tank 1. A sealing ring is provided between the fixed seat 201 and the gas storage tank 1. The fixed seat 201 is detachably connected to the gas storage tank 1, enabling convenient internal maintenance and increased airtightness. An electric slide rail 202 is fixedly connected inside the fixed seat 201. The electric slide rail 202 can drive the driving gear 205 to move to the driven gears at different positions, thus facilitating meshing with driven gears of different diameters. An electric push rod 203 is installed on the electric slide rail 202. The electric push rod 203 can drive the driving gear 205 to separate from or mesh with the driven gear. The end of the output shaft of the electric push rod 203 is fixedly connected to a lifting seat 204. A driving gear 205 is rotatably connected inside the lifting seat 204. A driving motor 206 is fixedly connected to the end of the driving gear 205. A support shaft 207 is provided at the bottom of the driving gear 205. A first driven gear 208 and a second driven gear 209 are fixedly connected to the support shaft 207. The diameter of the first driven gear 208 is larger than that of the second driven gear 209, and both the first driven gear 208 and the second driven gear 209 are matched with the driving gear 205, so that the driving gear 205 meshes with the first driven gear 208 and the second driven gear 209 respectively, thereby being able to change the rotation speed of the support shaft 207, causing the frequency of the separation and contact between the movable plug 213 and the port of the dust cleaning air pipe 3 to change, so as to change the pulse frequency. The end of the support shaft 207 is fixedly connected to a rotating disk 210. One end of the support shaft 207 is rotatably connected to the inner wall of the gas storage tank 1, and the end of the support shaft 207 away from the gas storage tank 1 is fixedly connected to the rotating disk 210, enabling the support shaft 207 to rotate and providing a good supporting effect on the rotating disk 210. A support seat 211 is fixedly connected to the top of the dust cleaning air pipe 3. A guide rod 212 is fixedly connected inside the support seat 211. A return spring is sleeved on the guide rod 212. The two ends of the return spring are respectively fixedly connected to the bottom surface of the support seat 211 and the top surface of the movable plug 213, enabling the return spring to reset the movable plug 213 so that it can seal the dust cleaning air pipe 3. A movable plug 213 is slidably connected to the guide rod 212. The top of the movable plug 213 is fixedly connected to a movable rod 216. A rocker arm 214 is provided between the top of the movable rod 216 and the eccentric position of the rotating disk 210. Both ends of the rocker arm 214 are fixedly connected to connecting sleeves 215. The top of the movable rod 216 penetrates through the support seat 211, and both ends of the rocker arm 214 are respectively rotatably connected to the eccentric position of the rotating disk 210 and the end of the movable rod 216 through the connecting sleeves 215, so that the rotating disk 210 can drive the movable rod 216 to move up and down through the rocker arm 214 and the connecting sleeves 215.

[0024] Please refer to Figure 1 and Figure 4, the installation mechanism 4 includes a fixing plate 401, on which a plurality of fixing bolts 402 are provided. At the end of the fixing plate 401, a support rod 403 is fixedly connected. At the end of the support rod 403, a first mounting bracket 405 is fixedly connected. On one side of the first mounting bracket 405, a second mounting bracket 406 is provided. Between the first mounting bracket 405 and the second mounting bracket 406, a plurality of mounting bolts 408 and mounting nuts 407 are provided. A limiting block 404 is fixedly connected to the gas storage tank 1. The gas storage tank 1 can be placed on the first mounting bracket 405, supported by the limiting block 404, then the second mounting bracket 406 is leaned against the first mounting bracket 405, and the mounting bolts 408 and mounting nuts 407 are used for fixing, which can facilitate the disassembly and maintenance of the gas storage tank 1.

[0025] During operation, the electric slide rail 202 drives the electric push rod 203 to move. The movement of the electric push rod 203 drives the driving gear 205 to move, and the driving gear 205 is moved between the first driven gear 208 and the second driven gear 209 with different diameters. The electric push rod 203 drives the driving gear 205 to mesh with the first driven gear 208 or the second driven gear 209. Meshing with driven gears with different diameters changes the rotation speed of the support shaft 207. The change in the rotation speed of the support shaft 207 affects the frequency of the up and down movement of the movable plug 213, thereby changing the pulse frequency. Then the driving motor 206 drives the driving gear 205 to rotate. The rotation of the driving gear 205 drives the support shaft 207 to rotate through the first driven gear 208 or the second driven gear 209. The rotation of the support shaft 207 drives the rotating disc 210 to rotate. The rotation of the rotating disc 210 drives the rocker arm 214 to move. The movement of the rocker arm 214 drives the movable rod 216 to move. The movement of the movable rod 216 drives the movable plug 213 to move. The movable plug 213 continuously moves up and down to contact and separate from the port of the dust cleaning air pipe 3, and discharges the compressed air from the dust cleaning air pipe 3 in the form of pulses, and can adjust the pulse frequency according to the actual use requirements, effectively improving the flexibility and convenience of use.

[0026] Meanwhile, the content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

Claims

1. An SCR off-furnace denitration pulse shock wave dust cleaning structure, including a gas storage tank (1), characterized in that: A dust cleaning air pipe (3) is connected to the gas storage tank (1). An adjustable pulse mechanism (2) is provided at the bottom of the dust cleaning air pipe (3), and a mounting mechanism (4) is provided outside the gas storage tank (1). The adjustable pulse mechanism (2) includes a fixed seat (201). An electric slide rail (202) is fixedly connected inside the fixed seat (201). An electric push rod (203) is mounted on the electric slide rail (202). The end of the output shaft of the electric push rod (203) is fixedly connected with a lifting seat (204). A driving gear (205) is rotatably connected inside the lifting seat (204). A driving motor (206) is fixedly connected to the end of the driving gear (205). A support shaft (207) is provided at the bottom of the driving gear (205). A first driven gear (208) and a second driven gear (209) are fixedly connected to the support shaft (207). A rotating disk (210) is fixedly connected to the end of the support shaft (207). A support seat (211) is fixedly connected to the top of the dust cleaning air pipe (3). A guide rod (212) is fixedly connected inside the support seat (211). A movable plug (213) is slidably connected to the guide rod (212). A movable rod (216) is fixedly connected to the top of the movable plug (213). A rocker arm (214) is provided between the eccentric part of the rotating disk (210) and the top end of the movable rod (216). Connecting sleeves (215) are fixedly connected to both ends of the rocker arm (214).

2. The SCR off-furnace denitration pulse shock wave soot cleaning structure according to claim 1, characterized in that: The fixed seat (201) is fixedly installed on the top of the gas storage tank (1), and a sealing ring is provided between the fixed seat (201) and the gas storage tank (1). The fixed seat (201) is detachably connected to the gas storage tank (1).

3. The SCR off-furnace denitration pulse shock wave soot cleaning structure according to claim 1, characterized in that: One end of the support shaft (207) is rotatably connected to the inner wall of the gas storage tank (1), and the end of the support shaft (207) far from the gas storage tank (1) is fixedly connected to the rotating disk (210).

4. The SCR off-furnace denitration pulse shock wave dust cleaning structure according to claim 1, characterized in that: The diameter of the first driven gear (208) is larger than that of the second driven gear (209), and both the first driven gear (208) and the second driven gear (209) are matched with the driving gear (205).

5. The SCR off-furnace denitration pulse shock wave dust cleaning structure according to claim 1, characterized in that: The top end of the movable rod (216) penetrates through the support seat (211), and both ends of the rocker arm (214) are respectively rotatably connected to the eccentric part of the rotating disk (210) and the end of the movable rod (216) through the connecting sleeves (215).

6. The SCR off-furnace denitration pulse shock wave soot cleaning structure according to claim 1, characterized in that: A return spring is sleeved on the guide rod (212), and both ends of the return spring are respectively fixedly connected to the bottom surface of the support seat (211) and the top surface of the movable plug (213).

7. A pulse shock wave soot cleaning structure for SCR off-furnace denitration according to claim 1, characterized in that: The mounting mechanism (4) includes a fixing plate (401), and a plurality of fixing bolts (402) are provided on the fixing plate (401).

8. The SCR off-furnace denitration pulse shock wave soot cleaning structure according to claim 7, characterized in that: One end of the fixed plate (401) is fixedly connected to a support rod (403), one end of the support rod (403) is fixedly connected to a first mounting bracket (405), a second mounting bracket (406) is provided on one side of the first mounting bracket (405), a plurality of mounting bolts (408) and mounting nuts (407) are provided between the first mounting bracket (405) and the second mounting bracket (406), and a limiting block (404) is fixedly connected to the gas storage tank (1).

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