Low-temperature denitration reduction reactor structure of gas-fired boiler

Abstract

The utility model relates to the technical field of reactors, and provides a low-temperature denitration reduction reactor structure of a gas-fired boiler, which comprises a reactor body, a plurality of catalyst layers, an ash removal component, a rotating mechanism, a moving mechanism and an ash extraction pipe, a reaction cavity is arranged in the reactor body, and the inner side wall of the reaction cavity is sequentially provided with the plurality of catalyst layers; the smoke inlet side of each catalyst layer is provided with a set of ash removal assemblies, the two ash removal assemblies in each set are symmetrically arranged on the two sides of the inner wall of the reaction cavity, the rotating mechanism is arranged at the top of the reactor body and used for controlling the ash removal assemblies to rotate to the direction right facing the catalyst layers, and the moving mechanism is arranged at the top of the reactor body and used for controlling the ash removal assemblies to rotate. And the reactor body is used for controlling the ash removal assembly to move in a reciprocating mode, and a plurality of ash extraction pipes are installed on the side wall of the reactor body and communicate with the reaction cavity. By means of the technical scheme, the problem that in the prior art, a catalyst layer in a low-temperature denitration reduction reactor of a gas boiler is prone to being blocked by dust, and the denitration effect is affected is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of reactors, and specifically, to a structure of a low-temperature denitration reduction reactor for a gas boiler. Background Art

[0002] A gas boiler is a device that uses gas as fuel to generate heat energy, and has the characteristics of high thermal efficiency, low cost and convenient use. It is a commonly used heat source device in modern households and industrial fields. When the combustion temperature of the fuel in the gas boiler is too high, the emission of nitrogen oxides will be relatively high, which not only results in poor combustion effect of the fuel, but also causes environmental pollution. Therefore, it is necessary to install a low-temperature denitration reduction reactor for transformation.

[0003] A low-temperature denitration reduction reactor for a gas boiler is a device that uses a catalyst to catalyze the reaction of nitrogen oxides, and can convert nitrogen oxides into harmless nitrogen and water. In order to increase the contact area between the flue gas and the catalyst, the structure of the catalyst generally adopts a honeycomb design. Compared with other heating surfaces in the flue, the specific surface area of the catalyst is larger, and the space for the flue gas to flow is smaller. Dust is extremely likely to accumulate inside the catalyst, resulting in a decline in the performance of the reactor and affecting the denitration effect. Therefore, the utility model proposes a structure of a low-temperature denitration reduction reactor for a gas boiler. Summary of the Utility Model

[0004] The utility model proposes a structure of a low-temperature denitration reduction reactor for a gas boiler, which solves the problem that the catalyst layer inside the low-temperature denitration reduction reactor of the gas boiler in the related technology is easily blocked by dust, affecting the denitration effect.

[0005] The technical solution of the utility model is as follows: A structure of a low-temperature denitration reduction reactor for a gas boiler includes a reactor body, a catalyst layer, a dust cleaning assembly, a rotating mechanism, a moving mechanism and a dust extraction pipe. A reaction chamber is arranged inside the reactor body. A plurality of catalyst layers are provided, and the plurality of catalyst layers are sequentially installed on the inner side wall of the reaction chamber. A group of dust cleaning assemblies are arranged on the smoke inlet side of each catalyst layer, and the two dust cleaning assemblies in each group are symmetrically arranged on both sides of the inner wall of the reaction chamber. The rotating mechanism is arranged on the top of the reactor body and is used to control the dust cleaning assembly to rotate to face the direction of the catalyst layer. The moving mechanism is arranged on the top of the reactor body and is used to control the reciprocating movement of the dust cleaning assembly.

[0006] Preferably, the moving mechanism includes a mounting seat, a first motor, a bi-directional reciprocating lead screw, a moving frame, and a connecting shaft. Two of the mounting seats are fixedly connected to the top end of the reactor body. The first motor is mounted on one of the mounting seats. The bi-directional reciprocating lead screw is rotatably connected between the two mounting seats. One end of the bi-directional reciprocating lead screw is fixedly connected to the output end of the first motor. There are two moving frames, and the two moving frames are symmetrically threadedly connected to the bi-directional reciprocating lead screw. A set of connecting shafts is rotatably connected to each moving frame, and the number of each set of connecting shafts is the same as the number of catalyst layers.

[0007] Preferably, the rotating mechanism includes a second motor, a transmission shaft, a first bevel gear, and a second bevel gear. The second motor is mounted on each moving frame. The transmission shaft is rotatably connected to each moving frame. One end of each transmission shaft is fixedly connected to the output end of the corresponding second motor. A set of first bevel gears is fixedly connected to each transmission shaft, and the number of each set of first bevel gears is the same as the number of catalyst layers. The second bevel gear is fixedly connected to each connecting shaft, and each second bevel gear meshes with the corresponding first bevel gear.

[0008] Furthermore, the dust cleaning assembly includes a ventilation shaft, a ventilation pipe, and a spray head. The bottom end of each connecting shaft is fixedly connected to the ventilation shaft. Each ventilation shaft is slidably connected to the inner bottom wall of the reaction chamber. A plurality of sliding holes are formed in the top of the reactor body. The top end of each ventilation shaft penetrates through the corresponding sliding hole. A plurality of ventilation pipes are communicated with each ventilation shaft, and a plurality of spray heads are communicated with each ventilation pipe.

[0009] Still further, a plurality of dust extraction pipes are mounted on the side wall of the reactor body, and the plurality of dust extraction pipes are communicated with the reaction chamber.

[0010] Still further, a protective cover is detachably mounted on the top end of the reactor body, and the plurality of first bevel gears, the plurality of second bevel gears, and the plurality of sliding holes are all located inside the protective cover.

[0011] The beneficial effects of the present utility model are as follows:

[0012] In the present utility model, when cleaning the dust blocked inside the catalyst layer, the second motor drives the transmission shaft and the first bevel gear to rotate. The first bevel gear drives the second bevel gear and the connecting shaft to rotate. The connecting shaft drives the dust cleaning assembly to rotate from the inner side wall of the reaction chamber to the direction facing the catalyst layer, so that the spray outlet of the spray head is aligned with the catalyst layer. Then, the first motor drives the bi-directional reciprocating lead screw to rotate. The bi-directional reciprocating lead screw drives the two moving frames to move towards the middle. The moving frame drives the dust cleaning assembly to reciprocate along the surface of the catalyst layer, thereby cleaning the entire catalyst layer.

[0013] Compared with the existing low-temperature denitration reduction reactor for gas boilers, the catalyst layer inside is easily blocked by dust, affecting the denitration effect. In the present utility model, through the cooperation of the rotation mechanism, the moving mechanism, and the dust cleaning component, the blocked dust in the entire catalyst layer can be cleaned, thereby improving the denitration effect of the low-temperature denitration reduction reactor for gas boilers and enhancing the denitration efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present utility model will be further described in detail below in conjunction with the drawings and specific embodiments.

[0015] Figure 1 It is a schematic structural view of a partial cross-section of the present utility model;

[0016] Figure 2 It is a schematic structural view of the whole of the present utility model;

[0017] Figure 3 It is a schematic structural view of another perspective of the whole of the present utility model;

[0018] Figure 4 It is a schematic structural view of the cooperation of the rotation mechanism and the moving mechanism of the present utility model;

[0019] Figure 5 It is a schematic structural view of the cooperation of the connecting shaft, the catalyst layer, and the dust cleaning mechanism of the present utility model.

[0020] In the figure: 1, smoke inlet pipe; 2, reactor body; 3, smoke outlet pipe; 4, ammonia injection grid; 5, mixer; 6, rectifier; 7, catalyst layer; 8, catalyst replacement port; 9, ash extraction pipe; 10, protective cover; 101, mounting seat; 102, motor one; 103, bi-directional reciprocating lead screw; 104, moving frame; 105, connecting shaft; 201, motor two; 202, transmission shaft; 203, bevel gear one; 204, bevel gear two; 301, ventilation shaft; 302, ventilation pipe; 303, nozzle. SPECIFIC EMBODIMENTS

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

[0022] Please refer to Figures 1 to 5, this embodiment proposes a structure of a low-temperature denitration reduction reactor for a gas boiler, which includes a flue gas inlet pipe, a reactor body 2, a flue gas outlet pipe 3, an ammonia injection grid 4, a mixer 5, a rectifier 6, a catalyst layer 7, a catalyst replacement port 8, a dust cleaning component, a rotating mechanism, a moving mechanism, a dust extraction pipe 9 and a protective cover 10. A reaction chamber is arranged inside the reactor body 2. The ammonia injection grid 4 and the mixer 5 are sequentially installed on the inner cavity side wall of the flue gas inlet pipe 1. The rectifier 6 is installed on the inner side wall of the reaction chamber. There are three catalyst layers 7, and the three catalyst layers 7 are sequentially installed on the inner side wall of the reaction chamber. Three catalyst replacement ports 8 are installed on the side wall of the reactor body 2 for installing and replacing the three catalyst layers 7. A set of dust cleaning components is arranged on the flue gas inlet side of each catalyst layer 7, and the two dust cleaning components in each group are symmetrically arranged on both sides of the inner wall of the reaction chamber. The rotating mechanism is arranged on the top of the reactor body 2 and is used to control the six dust cleaning components to rotate to face the three catalyst layers 7. The moving mechanism is arranged on the top of the reactor body 2 and is used to control the six dust cleaning components to reciprocate. Four dust extraction pipes 9 are installed on the side wall of the reactor body 2, and the four dust extraction pipes 9 are all communicated with the reaction chamber. It should be noted that for the convenience of timely extracting the cleaned dust, a dust extraction device can be used together during the dust cleaning process. The dust extraction device can be a vacuum cleaner, and the vacuum cleaner is connected to the four dust extraction pipes 9 during dust cleaning.

[0023] Please refer to Figures 1 to 4 , wherein, the moving mechanism includes a mounting seat 101, a first motor 102, a bi-directional reciprocating lead screw 103, a moving frame 104 and a connecting shaft 105. Two mounting seats 101 are fixedly connected to the top end of the reactor body 2. The first motor 102 is installed on one of the mounting seats 101. The bi-directional reciprocating lead screw 103 is rotatably connected between the two mounting seats 101. One end of the bi-directional reciprocating lead screw 103 is fixedly connected to the output end of the first motor 102. There are two moving frames 104, and the two moving frames 104 are symmetrically threadedly connected to the bi-directional reciprocating lead screw 103. Three connecting shafts 105 are rotatably connected to each moving frame 104.

[0024] Please refer to Figures 1 to 4 , wherein, the rotating mechanism includes a second motor 201, a transmission shaft 202, a first bevel gear 203 and a second bevel gear 204. A second motor 201 is installed on each moving frame 104. A transmission shaft 202 is rotatably connected to each moving frame 104. One end of each transmission shaft 202 is fixedly connected to the output end of the corresponding second motor 201. Three first bevel gears 203 are fixedly connected to each transmission shaft 202. A second bevel gear 204 is fixedly connected to each connecting shaft 105. Each second bevel gear 204 meshes with the corresponding first bevel gear 203. The protective cover 10 is detachably installed on the top end of the reactor body 2, and the six first bevel gears 203 and the six second bevel gears 204 are all located inside the protective cover 10, thus protecting the safety of the operator.

[0025] Please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 5 ,wherein the dust cleaning assembly includes a ventilation shaft 301, a ventilation pipe 302 and a spray head 303. The bottom end of each connecting shaft 105 is fixedly connected with a ventilation shaft 301. The six ventilation shafts 301 are all slidably connected to the inner bottom wall of the reaction chamber. Six sliding holes are formed in the top of the reactor body 2. The top end of each ventilation shaft 301 penetrates through the corresponding sliding hole. The six sliding holes are all located inside the protective cover 10. The protective cover 10 has good sealing performance to prevent the flue gas in the reactor from leaking.

[0026] A plurality of ventilation pipes 302 are communicated with each ventilation shaft 301, and a plurality of spray heads 303 are communicated with each ventilation pipe 302. It should be added that the dust cleaning assembly needs to be used together with an air compression device. The air compression device can be an air compression pump and an air pipeline. The top end of each ventilation shaft 301 is communicated with the air pipeline. The air pipeline needs to have enough length to keep the transportation smooth during the movement of the dust cleaning assembly.

[0027] In this embodiment, when using the low-temperature denitrification reduction reactor of the gas boiler, the flue gas enters from the inlet flue gas pipe 1. The ammonia gas sprayed by the ammonia injection grid 4 is fully mixed with the flue gas in the mixer 5. The mixed gas is further mixed under the action of the rectifier 6, and the flow rate of the mixed gas is also more uniform. Then the mixed gas flows through a plurality of catalyst layers 7 arranged in sequence, so that the flue gas fully reacts in the plurality of catalyst layers 7 to achieve a better denitrification effect. The treated gas is discharged from the outlet flue gas pipe 3. When it is necessary to clean the dust blocked inside the catalyst layer 7, connect the vacuum cleaner to the ash extraction pipe 9, then turn on the air compression pump. The compressed air generated by the air compression pump enters the ventilation shaft 301 through the air pipeline. Then the compressed air is sprayed out from the spray head 303 through the ventilation pipe 302. Start the second motor 201. The second motor 201 drives the transmission shaft 202 to rotate. The transmission shaft 202 drives the first bevel gear 203 to rotate. The first bevel gear 203 drives the second bevel gear 204 to rotate. The second bevel gear 204 drives the connecting shaft 105 to rotate. The connecting shaft 105 drives the dust cleaning assembly to rotate from the inner side wall of the reaction chamber to the direction facing the catalyst layer 7, so that the spray outlet of the spray head 303 is aligned with the catalyst layer 7. Then start the first motor 102. The first motor 102 drives the bidirectional reciprocating lead screw 103 to rotate. The bidirectional reciprocating lead screw 103 drives the two moving frames 104 to move towards the middle. After the two moving frames 104 move to the middle position, they respectively return to both sides along the original path. The moving frame 104 drives the connecting shaft 105 to move. The connecting shaft 105 drives the dust cleaning assembly to reciprocate along the surface of the catalyst layer 7, so as to clean the entire catalyst layer 7.

[0028] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A low-temperature denitrification reduction reactor structure for a gas boiler, comprising a reactor body (2) and a catalyst layer (7). A reaction chamber is arranged inside the reactor body (2), and a plurality of the catalyst layers (7) are sequentially installed on the inner side wall of the reaction chamber. It is characterized in that, It further includes: Ash cleaning components, one set of which is arranged on the smoke inlet side of each catalyst layer (7), and the two ash cleaning components in each set are symmetrically arranged on both sides of the inner wall of the reaction chamber; A rotating mechanism, which is arranged at the top of the reactor body (2) and is used to control the ash cleaning components to rotate to face the catalyst layer (7); A moving mechanism, which is arranged at the top of the reactor body (2) and is used to control the reciprocating movement of the ash cleaning components.

2. The structure of a low-temperature denitration reduction reactor for a gas boiler according to claim 1, wherein The moving mechanism includes: Mounting seats (101), and two mounting seats (101) are fixedly connected to the top end of the reactor body (2); Motor 1 (102), which is installed on one of the mounting seats (101); A bi-directional reciprocating lead screw (103), which is rotatably connected between the two mounting seats (101), and one end of the bi-directional reciprocating lead screw (103) is fixedly connected to the output end of the motor 1 (102); Moving frames (104), two of which are provided, and the two moving frames (104) are symmetrically threadedly connected to the bi-directional reciprocating lead screw (103); Connecting shafts (105), one set of which is rotatably connected to each moving frame (104), and the number of each set of connecting shafts (105) is the same as the number of catalyst layers (7).

3. The structure of a low-temperature denitration reduction reactor for a gas boiler according to claim 2, wherein, The rotating mechanism includes: Motor 2 (201), which is installed on each moving frame (104); Drive shafts (202), which are rotatably connected to each moving frame (104), and one end of each drive shaft (202) is fixedly connected to the output end of the corresponding motor 2 (201); Bevel gears 1 (203), one set of which is fixedly connected to each drive shaft (202), and the number of each set of bevel gears 1 (203) is the same as the number of catalyst layers (7); Bevel gears 2 (204), which are fixedly connected to each connecting shaft (105), and each bevel gear 2 (204) meshes with the corresponding bevel gear 1 (203).

4. The structure of a low-temperature denitrification reduction reactor for a gas boiler according to claim 3, characterized in that, The ash cleaning components include: Ventilation shafts (301), the bottom end of each connecting shaft (105) is fixedly connected with the ventilation shaft (301), each ventilation shaft (301) is slidably connected to the inner bottom wall of the reaction chamber, and a plurality of sliding holes are opened at the top of the reactor body (2), and the top end of each ventilation shaft (301) penetrates through the corresponding sliding hole; Ventilation pipes (302), a plurality of ventilation pipes (302) are communicated with each ventilation shaft (301), and a plurality of nozzles (303) are communicated with each ventilation pipe (302).

5. A structure of a low-temperature denitration reduction reactor for a gas boiler according to claim 4, characterized in that, A plurality of ash extraction pipes (9) are installed on the side wall of the reactor body (2), and the plurality of ash extraction pipes (9) are all communicated with the reaction chamber.

6. The structure of a low-temperature denitration reduction reactor for a gas boiler according to claim 5, characterized in that, A protective cover (10) is detachably installed at the top of the reactor body (2), and a plurality of the first bevel gears (203), a plurality of the second bevel gears (204), and a plurality of the sliding holes are all located inside the protective cover (10).

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