Soot blower of SCR (Selective Catalytic Reduction) denitration reactor

Abstract

The utility model relates to the technical field of desulfurization and denitrification, in particular to a soot blower of an SCR (Selective Catalytic Reduction) denitrification reactor, which comprises a main body, a catalyst layer is fixedly arranged in the main body, a gas disc is arranged below the catalyst layer, a vertical rod is fixedly and vertically arranged on the lower surface of the gas disc, and a hinge ball is fixedly sleeved on the middle part of the vertical rod. A supporting block is fixedly installed in the main body through a plurality of L-shaped supporting rods, moving holes are formed in the multiple supporting rods, moving rods are horizontally and slidably installed in the multiple moving holes through elastic assemblies, and a transmission assembly is arranged in the main body. When the moving rod is in contact with the vertical rod, the air disc is driven to incline towards the moving moving rod, so that air blown out by the air nozzle is obliquely blown to the lower surface of a catalyst layer, dust adsorbed on the lower surface of the catalyst layer can be blown into the circulating holes of the catalyst layer, dust residue is effectively prevented, and the catalytic effect of the catalyst layer is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of desulfurization and denitrification, and in particular to a soot blowing device for an SCR denitrification reactor. Background Technology

[0002] With social development, both industrial and residential electricity consumption are increasing year by year. Boilers are an indispensable piece of equipment in power plants. A boiler is essentially an energy converter. It is a device that uses the heat energy released by fuel combustion or other heat energy to heat the working fluid water or other fluids to certain parameters. The fuel for boilers is usually pulverized coal. In order to prevent NOx pollution from the exhaust gas after coal combustion in the boiler, the exhaust gas of the boiler needs to be denitrified.

[0003] Chinese patent CN212492399U discloses a soot blowing device for an SCR denitrification reactor. Flue gas is introduced into the main body through an inlet pipe. After denitrification through the catalyst layer, the flue gas is discharged through an outlet pipe. When the fan is turned on, air enters the connecting pipe and the jet plate through the fan and is then sprayed out through multiple sets of air nozzles. The dust accumulated on the upper part of the catalyst layer is blown up, preventing the dust from blocking the flow holes on the catalyst surface and improving the reliability of use.

[0004] In the aforementioned patent literature, the gas blown out of the nozzle is blown vertically toward the catalyst layer. When dust accumulates at the lower end of the catalyst layer, the gas cannot effectively blow all the dust over the catalyst layer, and a small amount of dust adheres to the lower surface of the catalyst layer, which to some extent affects the catalytic effect of the catalyst layer. Utility Model Content

[0005] The purpose of this invention is to address the following shortcomings in the existing technology: when the gas blown out of the nozzle is directed vertically toward the catalyst layer, and dust accumulates at the lower end of the catalyst layer, the gas cannot effectively blow all the dust over the catalyst layer, leaving a small amount of dust adhering to the lower surface of the catalyst layer, which to some extent affects the catalytic effect of the catalyst layer. Therefore, this invention proposes a soot blowing device for an SCR denitrification reactor.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A soot blowing device for an SCR denitrification reactor includes a main body, within which a catalyst layer is fixedly installed. An ash discharge pipe is fixedly installed on the main body, with one end of the pipe directly above the catalyst layer. An air plate is located below the catalyst layer, and multiple air nozzles are fixedly installed on the upper surface of the air plate. A vertical rod is fixedly installed vertically on the lower surface of the air plate, with a hinged ball fitted into the middle of the rod. A support block is fixedly installed within the main body via multiple L-shaped support rods, with an arc-shaped groove extending through the middle of each support block. The hinged ball is rolled and embedded within the arc-shaped groove. Each of the support rods has a movable hole, and a movable rod is horizontally slidably installed within each movable hole via an elastic component. The movable rods are arranged circumferentially at the lower end of the vertical rod. A transmission component is provided within the main body for intermittently moving the multiple movable rods.

[0008] Preferably, the elastic component includes a hemispherical top block fixedly installed at one end of the moving rod and a telescopic spring sleeved on the moving rod, wherein the two ends of the telescopic spring are fixedly connected to the top block and the support rod, respectively.

[0009] Preferably, the transmission assembly includes a support ring fixedly installed in the main body by multiple support rods, a rotating ring rotatably installed on the support ring, an arc-shaped guide block fixedly installed in the inner ring of the rotating ring, and a driving component for driving the rotating ring to rotate, wherein the arc-shaped guide block intermittently contacts multiple top blocks.

[0010] Preferably, the driving component includes a drive motor fixedly installed in the main body, a spur gear fixedly installed at the output end of the drive motor, and a gear ring fixedly sleeved on the rotating ring, wherein the spur gear and the gear ring are meshed and connected.

[0011] Preferably, all of the movable rods are in a horizontal state, and one end of each movable rod is in contact with the side of the vertical rod.

[0012] Preferably, a fan is installed on the side of the main body, and the fan is connected to the air coil via a connecting pipe.

[0013] The beneficial effects of this utility model are as follows:

[0014] The gas plate is installed directly below the catalyst layer via a vertical rod, a hinged ball, and a support block. When the soot blowing device is in use, it can intermittently drive multiple moving rods towards the vertical rod through the transmission component. When the moving rods contact the vertical rod, they will cause the gas plate to tilt towards the moving rod, so that the gas blown out of the nozzle will be blown at an angle towards the lower surface of the catalyst layer, allowing the dust adsorbed on the lower surface of the catalyst layer to be blown into the flow holes of the catalyst layer, effectively preventing dust residue and improving the catalytic effect of the catalyst layer. Attached Figure Description

[0015] Figure 1This is a three-dimensional cross-sectional structural diagram of a soot blowing device for an SCR denitrification reactor proposed in this utility model;

[0016] Figure 2 A three-dimensional partial structural diagram of the vertical rod, support block, hinge ball, air disc, moving rod, and transmission assembly;

[0017] Figure 3 A three-dimensional structural diagram of the transmission assembly, support rod, moving rod, and top block;

[0018] Figure 4 A three-dimensional structural diagram of the support block, hinge ball, and vertical rod;

[0019] Figure 5 for Figure 3 Enlarged view of the structure at point A in the middle.

[0020] In the diagram: 1 Main body, 2 Catalyst layer, 3 Ash discharge pipe, 4 Gas plate, 5 Fan, 6 Vertical rod, 7 Hinge ball, 8 Support rod, 9 Support block, 10 Moving rod, 11 Top block, 12 Telescopic spring, 13 Support ring, 14 Rotating ring, 15 Arc-shaped guide block, 16 Drive motor, 17 Spur gear, 18 Gear ring. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Reference Figures 1-5 A soot blowing device for an SCR denitrification reactor includes a main body 1, a catalyst layer 2 fixedly installed inside the main body 1, an ash discharge pipe 3 fixedly installed on the main body 1, one end of the ash discharge pipe 3 being located directly above the catalyst layer 2, an air plate 4 being provided below the catalyst layer 2, multiple air nozzles being fixedly installed on the upper surface of the air plate 4, and a blower 5 being installed on the side of the main body 1, with the blower 5 and the air plate 4 connected by a connecting pipe.

[0023] The air plate 4 is installed directly below the catalyst layer 2. When performing the soot blowing operation, the blower 5 is started, and the generated gas is transported to the air plate 4 through the connecting pipe. Then, it is blown towards the catalyst layer 2 through multiple air nozzles to blow up the dust on the catalyst layer 2. The dust is then sucked out through the ash discharge pipe 3. An air pump is installed at the other end of the ash discharge pipe 3, which can suck out the dust in the device. The air pump is existing technology and is not shown in the figure.

[0024] A vertical rod 6 is fixedly installed on the lower surface of the air plate 4. A hinge ball 7 is fixedly sleeved in the middle of the vertical rod 6. A support block 9 is fixedly installed inside the main body 1 through multiple L-shaped support rods 8. An arc groove is opened through the middle of the support block 9. The hinge ball 7 is rolled and embedded in the arc groove. The hinge ball 7 is rolled on the support block 9, so that the vertical rod 6 can rotate with the hinge ball 7 as the center.

[0025] Multiple support rods 8 are provided with movable holes, and movable rods 10 are horizontally slidably installed in multiple movable holes through elastic components. Multiple movable rods 10 are arranged circumferentially at the lower end of the vertical rod 6. The main body 1 is provided with a transmission component for driving multiple movable rods 10 to move intermittently. Multiple movable rods 10 are all in a horizontal state, and one end of multiple movable rods 10 is in contact with the side of the vertical rod 6.

[0026] There is a gap between each adjacent flow hole in the catalyst layer 2. When gas is blown vertically towards the catalyst layer 2, a small amount of dust will remain in the gap between two adjacent flow holes and cannot pass through the flow hole.

[0027] The movable rod 10 is horizontally arranged around the vertical rod 6. When the transmission component contacts one end of the movable rod 10, it will drive the movable rod 10 to move towards the vertical rod 6. As a result, one end of the movable rod 10 will rotate around the hinge ball 7 against the vertical rod 6. This will cause the vertical rod 6 to tilt towards the movable rod 10. The gas blown out of the nozzle will be blown at an angle towards the lower surface of the catalyst layer 2, so that the dust adsorbed on the lower surface of the catalyst layer 2 can be blown into the flow holes of the catalyst layer 2, effectively preventing dust residue and improving the catalytic effect of the catalyst layer 2.

[0028] The elastic component includes a hemispherical top block 11 fixedly installed at one end of the moving rod 10 and a telescopic spring 12 sleeved on the moving rod 10. The two ends of the telescopic spring 12 are fixedly connected to the top block 11 and the support rod 8, respectively. The moving rod 10 slides horizontally on the support rod 8, and the telescopic spring 12 is in the initial state. At this time, one end of the moving rod 10 is just in contact with the vertical rod 6.

[0029] The transmission assembly includes a support ring 13 fixedly installed in the main body 1 by multiple support rods, a rotating ring 14 rotatably installed on the support ring 13, an arc-shaped guide block 15 fixedly installed on the inner ring of the rotating ring 14, and a drive component for driving the rotating ring 14 to rotate. The arc-shaped guide block 15 intermittently contacts multiple top blocks 11. The drive component includes a drive motor 16 fixedly installed in the main body 1, a spur gear 17 fixedly installed at the output end of the drive motor 16, and a gear ring 18 fixedly sleeved on the rotating ring 14. The spur gear 17 meshes with the gear ring 18.

[0030] When the drive motor 16 is started, it can drive the spur gear 17 to rotate. Then, through the transmission effect between the spur gear 17 and the gear ring 18, the rotating ring 14 is driven to rotate on the support ring 13. When the rotating ring 14 rotates, it can drive the arc-shaped guide block 15 to rotate around the vertical rod 6. At the same time, the arc-shaped guide block 15 will slide into contact with the top block 11 installed at one end of the moving rod 10. Under the action of the arc-shaped guide block 15, the moving rod 10 will be driven to move towards the vertical rod 6. The telescopic spring 12 is compressed, thereby causing the vertical rod 6 to tilt. When the arc-shaped guide block 15 separates from the top block 11, under the action of the elastic force of the telescopic spring 12, the moving rod 10 will be driven to move to the initial position. When the arc-shaped guide block 15 contacts the next top block 11, the vertical rod 6 will be driven to tilt in another direction through another moving rod 10, thereby causing the gas plate 4 to tilt at different angles and changing the blowing angle of the gas nozzle to the catalyst layer 2.

[0031] In this invention, the movable rod 10 is horizontally arranged around the vertical rod 6. When the transmission component contacts one end of the movable rod 10, it will drive the movable rod 10 to move towards the vertical rod 6. As a result, one end of the movable rod 10 will rotate around the hinge ball 7 against the vertical rod 6. This will cause the vertical rod 6 to tilt towards the movable rod 10. The gas blown out of the nozzle will be blown at an angle towards the lower surface of the catalyst layer 2, so that the dust adsorbed on the lower surface of the catalyst layer 2 can be blown into the flow holes of the catalyst layer 2, effectively preventing dust residue and improving the catalytic effect of the catalyst layer 2.

[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A soot blowing device of an SCR denitration reactor comprising a main body (1), characterized in that, The main body (1) is fixedly installed with a catalyst layer (2), the main body (1) is fixedly installed with an ash discharge pipe (3), one end of the ash discharge pipe (3) is located directly above the catalyst layer (2), the catalyst layer (2) is provided with a gas disc (4) below, a plurality of air nozzles are fixedly installed on the upper surface of the gas disc (4); a vertical rod (6) is fixedly installed on the lower surface of the gas disc (4), a hinge ball (7) is fixedly sleeved on the middle part of the vertical rod (6), a support block (9) is fixedly installed in the main body (1) through a plurality of L-shaped supporting rods (8), an arc-shaped slot is formed in the middle part of the support block (9), and the hinge ball (7) is rollingly embedded in the arc-shaped slot; a plurality of moving holes are formed in the supporting rods (8), a moving rod (10) is slidably installed in the moving holes through an elastic assembly, and a plurality of moving rods (10) are circumferentially arranged at the lower end of the vertical rod (6); the main body (1) is provided with a transmission assembly for intermittently moving the plurality of moving rods (10).

2. The soot blowing device of the SCR denitration reactor according to claim 1, characterized in that, The elastic assembly comprises a hemispherical top block (11) fixedly installed on one end of the moving rod (10) and a telescopic spring (12) sleeved on the moving rod (10), and the two ends of the telescopic spring (12) are fixedly connected with the top block (11) and the supporting rod (8) respectively.

3. The soot blowing device of the SCR denitration reactor according to claim 2, characterized in that, The transmission assembly comprises a supporting ring (13) fixedly installed in the main body (1) through a plurality of supporting rods, a rotating ring (14) rotatably installed on the supporting ring (13), an arc-shaped guide block (15) fixedly installed on the inner circle of the rotating ring (14), and a driving component for driving the rotating ring (14) to rotate, and the arc-shaped guide block (15) is intermittently in contact with a plurality of top blocks (11).

4. The soot blowing device of the SCR denitration reactor according to claim 3, characterized in that, The driving component comprises a driving motor (16) fixedly installed in the main body (1), a spur gear (17) fixedly installed on the output end of the driving motor (16), and a gear ring (18) fixedly sleeved on the rotating ring (14), and the spur gear (17) is in meshing connection with the gear ring (18).

5. The soot blower of the SCR denitration reactor according to claim 1, characterized in that, The plurality of moving rods (10) are in a horizontal state, and one end of the plurality of moving rods (10) is in contact with the side surface of the vertical rod (6).

6. The soot blower of the SCR denitration reactor according to claim 1, characterized in that, The main body (1) is provided with a fan (5) on the side surface, and the fan (5) and the gas disc (4) are communicated through a connecting pipe.

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