Reaction device for denitration waste gas treatment of power plant

Abstract

The utility model discloses a reaction device for denitration waste gas treatment of a power plant, and relates to the field of reaction devices. The device comprises a denitration reactor main body, a smoke inlet formed in the outer wall of one end of the denitration reactor main body and a spray head arranged in the denitration reactor main body and used for spraying ammonia gas, a catalyst layer is arranged in the denitration reactor main body, and an outlet is formed in the bottom end face of the denitration reactor main body. According to the reaction device for treating the denitration waste gas of the power plant, the buffer mechanism is arranged at the position, close to the spray head, of the denitration reactor main body, so that the path of the waste gas passing through the spray head is prolonged, uniform mixing between ammonia gas and the waste gas is increased, and the waste gas is conveniently purified under the action of catalytic reaction in the later period; and the impact mechanism is arranged at the buffer mechanism, so that the buffer mechanism is prevented from being blocked by impurities in the waste gas, and the smoothness of a waste gas flowing path is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of reaction devices, in particular to a reaction device for treating denitration waste gas in a power plant. Background Art

[0002] During the operation of a power plant, a large amount of waste gas is generated. Direct discharge of the waste gas into the external environment will cause pollution to the external environment. Therefore, a denitrification reactor is currently used to purify the waste gas, that is, the waste gas is passed into the denitrification reactor through a smoke inlet, and at the same time, a nozzle arranged at the denitrification reactor sprays ammonia so as to add ammonia to the waste gas. The waste gas with added ammonia then reacts at the catalyst layer. During the reaction, the nitrogen oxides in the waste gas are converted into water and nitrogen, so that the flue gas is purified, and the purified flue gas is discharged through the outlet.

[0003] However, insufficient mixing of ammonia and exhaust gas may occur, thus affecting the subsequent catalytic reaction and purification of exhaust gas.

[0004] The main reason for the above problems is that there is no device for extending the exhaust gas flow path near the nozzle of the denitrification reactor, so that after the exhaust gas enters the denitrification reactor through the smoke inlet, it will quickly contact the catalytic layer arranged inside the denitrification reactor. In this process, the contact time between the exhaust gas and ammonia is short, so that the ammonia content carried in the exhaust gas is low, so that when the ammonia reacts with the catalytic layer in the later stage, it cannot produce more substances used for exhaust gas purification, affecting the exhaust gas purification quality. In view of the above problems, we propose a reaction device for denitrification exhaust gas treatment in power plants. Utility Model Content

[0005] In view of the deficiencies of the prior art, the utility model provides a reaction device, which solves the problem that insufficient mixing between ammonia and exhaust gas occurs easily, thereby affecting the subsequent catalytic reaction purification of the exhaust gas.

[0006] To achieve the above purpose, the utility model is implemented by the following technical scheme: a reaction device for treating denitration waste gas in a power plant, comprising a denitration reactor body, a smoke inlet provided on the outer wall of one end of the denitration reactor body, and a nozzle arranged inside the denitration reactor body for spraying ammonia gas, wherein a buffer mechanism is provided on the inner wall of the denitration reactor body close to the nozzle, and the buffer mechanism comprises:

[0007] A guide plate is arranged on the inner wall of the denitration reactor body, and a plurality of groups of the guide plates are staggeredly distributed;

[0008] A grid plate, which is arranged between two adjacent groups of guide plates;

[0009] The impact mechanism is used to clean the impurities adhering to the guide plate and the grille plate.

[0010] Preferably, the impact mechanism comprises:

[0011] A support rod rotatably connected to the inner wall of the denitration reactor body, wherein the outer wall of the support rod is provided with a sphere that collides with the guide plate;

[0012] A push rod is rotatably connected to the inner wall of the denitration reactor body, and is used to push the ball to impact the guide plate.

[0013] Preferably, the inner wall of the denitration reactor body is rotatably connected with a movable rod, and a plurality of groups of push rods are arranged on the outer wall of the movable rod.

[0014] Preferably, the inner wall of the denitration reactor body is provided with a reset component, and the reset component is used to drive the sphere to reset.

[0015] Preferably, the reset component comprises:

[0016] A support cylinder is fixedly connected to the inner wall of the denitration reactor body, one end of the support rod is inserted and arranged inside the support cylinder, and one end of the support rod is rotatably arranged inside the support cylinder;

[0017] The torsion spring is arranged inside the support tube and is used to drive the ball to reset.

[0018] Preferably, the outer wall of the denitration reactor body is provided with a bracket for supporting the denitration reactor body, and the top end surface of the denitration reactor body is provided with a connection box for assisting the installation of a nozzle.

[0019] Preferably, a catalytic layer is disposed inside the denitration reactor body, and an outlet is provided on the bottom end surface of the denitration reactor body.

[0020] The utility model discloses a reaction device for treating denitration waste gas in a power plant, which has the following beneficial effects: the reaction device for treating denitration waste gas in a power plant, by arranging a buffer mechanism at a position close to a nozzle on a denitration reactor body, extends the path of the waste gas passing through the nozzle, thereby increasing the uniform mixing between ammonia and the waste gas, so as to achieve purification of the waste gas under the action of a catalytic reaction in the later stage, and an impact mechanism is arranged at the buffer mechanism, so as to avoid the buffer mechanism being blocked by impurities in the waste gas, thereby ensuring the smoothness of the waste gas flow route. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0023] Figure 2 This is a cross-sectional view of the internal structure of the main body of the denitration reactor of the utility model;

[0024] Figure 3 This is a schematic diagram of the structure of the nozzle and guide plate of the utility model;

[0025] Figure 4 This is a schematic diagram of the structure of the guide plate, ball and push rod of the utility model;

[0026] Figure 5 This is a schematic diagram of the ball and push rod structure of the utility model;

[0027] Figure 6 It is a plan view of the support rod, support tube and torsion spring structure of the utility model.

[0028] In the figure, 1. denitrification reactor body; 101. bracket; 102. smoke inlet; 103. outlet; 2. connection box; 201. nozzle; 3. catalyst layer; 4. buffer mechanism; 401. guide plate; 402. grille plate; 403. impact mechanism; 4031. support rod; 4032. sphere; 4033. movable rod; 4034. push rod; 4035. reset assembly; 40351. support cylinder; 40352. torsion spring. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model is described clearly and completely. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] The embodiment of the present application provides a reaction device to solve the problem of insufficient mixing between ammonia and exhaust gas, thereby affecting the subsequent catalytic reaction and purification of exhaust gas, and achieves more uniform mixing between exhaust gas and ammonia.

[0031] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0032] The utility model embodiment discloses a reaction device for treating denitration waste gas in a power plant.

[0033] According to the attached Figure 1-6 As shown, it includes a denitration reactor body 1, a smoke inlet 102 opened on the outer wall of one end of the denitration reactor body 1, and a nozzle 201 arranged inside the denitration reactor body 1 for spraying ammonia. The outer wall of the denitration reactor body 1 is provided with a bracket 101 for supporting the denitration reactor body 1, and the top end surface of the denitration reactor body 1 is provided with a connection box 2 for assisting the installation of the nozzle 201. The connection box 2 is provided with a pipe body for connecting the nozzle 201 with an ammonia containing device. The interior of the denitration reactor body 1 is provided with a catalytic layer 3, and the bottom end surface of the denitration reactor body 1 is provided with an outlet 103. The denitration reactor body 1, the smoke inlet 102, and the nozzle 201 arranged inside the denitration reactor body 1 are provided with a nozzle 201 for spraying ammonia. 2. The nozzle 201, the catalyst layer 3 and other components constitute a denitration reactor. The denitration reactor can refer to the patent [CN219836342U], which is specifically a flue gas denitration reactor. When the denitration reactor is in use, the exhaust gas generated in the production process of the power plant is introduced into the interior of the denitration reactor body 1 through the smoke inlet 102, and at the same time, the nozzle 201 sprays ammonia on the position of the denitration reactor body 1 close to the smoke inlet 102, thereby adding ammonia to the exhaust gas, and then the exhaust gas added with ammonia reacts at the catalyst layer 3. During the reaction, the nitrogen oxides in the exhaust gas are converted into water and nitrogen, so that the flue gas is purified, and the purified flue gas is discharged through the outlet 103.

[0034] A buffer mechanism 4 is provided on the inner wall of the denitration reactor body 1 near the nozzle 201, which increases the contact time between ammonia and exhaust gas. The buffer mechanism 4 includes a guide plate 401, which is provided on the inner wall of the denitration reactor body 1. Multiple groups of guide plates 401 are staggered, and a grid plate 402 is provided between two adjacent groups of guide plates 401. The staggered guide plates 401 correspond to the position of the nozzle 201, so that when the exhaust gas passes through the guide plate 401, its flow path is extended, thereby slowing down the flow rate of the exhaust gas.

[0035] The impact mechanism 403 is used to clean the impurities adhered to the guide plate 401 and the grid plate 402, that is, to prevent the holes at the grid plate 402 from being blocked by impurities in the exhaust gas, affecting the smooth flow of the exhaust gas. The impact mechanism 403 includes a support rod 4031, which is rotatably connected to the inner wall of the denitration reactor body 1, and the outer wall of the support rod 4031 is provided with a ball 4032 that collides with the guide plate 401. The push rod 4034 is rotatably connected to the inner wall of the denitration reactor body 1, and the push rod 4034 is used to push the ball 4032 to collide with the guide plate 401. Impact, the inner wall of the denitrification reactor body 1 is rotatably connected with a movable rod 4033, and multiple groups of push rods 4034 are arranged on the outer wall of the movable rod 4033. The push rods 4034 are rotated with the movable rod 4033 under the impact of the exhaust gas, so that when the push rods 4034 are rotated to contact with the sphere 4032, the sphere 4032 can be pushed to a position in contact with the guide plate 401, so that the guide plate 401 and the grille plate 402 vibrate under the impact of the sphere 4032, so that the impurities adhered to the grille plate 402 fall off from the grille plate 402 under the action of vibration.

[0036] A reset component 4035 is provided on the inner wall of the denitration reactor body 1, and the reset component 4035 is used to drive the sphere 4032 to reset. The reset component 4035 includes a support tube 40351, and the support tube 40351 is fixedly connected to the inner wall of the denitration reactor body 1, one end of the support rod 4031 is inserted and arranged inside the support tube 40351, and one end of the support rod 4031 is rotatably arranged inside the support tube 40351, and a torsion spring 40352 is arranged inside the support tube 40351. The torsion spring 40352 is used to drive the sphere 4032 to reset, that is, the sphere 4032 is reset to a position where it does not contact the guide plate 401.

[0037] The reaction device for treating denitration waste gas from a power plant is provided with a buffer mechanism 4 at a position near the nozzle 201 of the denitration reactor body 1, so that the path of the waste gas passing through the nozzle 201 is extended, thereby increasing the uniform mixing between the ammonia gas and the waste gas, so as to achieve purification of the waste gas under the action of a catalytic reaction later, and an impact mechanism 403 is provided at the buffer mechanism 4 to prevent the buffer mechanism 4 from being blocked by impurities in the waste gas, thereby ensuring the smoothness of the waste gas flow path.

[0038] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A reaction device for treating denitration waste gas in a power plant, comprising a denitration reactor body (1), a smoke inlet (102) provided on the outer wall of one end of the denitration reactor body (1), and a nozzle (201) arranged inside the denitration reactor body (1) for spraying ammonia, characterized in that: The inner wall of the denitration reactor body (1) close to the nozzle (201) is provided with a buffer mechanism (4), and the buffer mechanism (4) comprises: A guide plate (401) is arranged on the inner wall of the denitration reactor body (1), and a plurality of groups of the guide plates (401) are staggeredly distributed; A grid plate (402) disposed between two adjacent groups of guide plates (401); The impact mechanism (403) is used to clean the impurities adhering to the guide plate (401) and the grid plate (402).

2. A reaction device for treating denitrification waste gas in a power plant according to claim 1, characterized in that: The impact mechanism (403) comprises: A support rod (4031) is rotatably connected to the inner wall of the denitration reactor body (1), and the outer wall of the support rod (4031) is provided with a sphere (4032) that collides with the guide plate (401); A push rod (4034) is rotatably connected to the inner wall of the denitration reactor body (1), and the push rod (4034) is used to push the ball (4032) to impact the guide plate (401).

3. A reaction device for treating denitrification waste gas from a power plant according to claim 2, characterized in that: The inner wall of the denitration reactor body (1) is rotatably connected to a movable rod (4033), and a plurality of groups of push rods (4034) are arranged on the outer wall of the movable rod (4033).

4. The reaction device for treating denitrification waste gas in a power plant according to claim 2, characterized in that: The inner wall of the denitration reactor body (1) is provided with a reset component (4035), and the reset component (4035) is used to drive the sphere (4032) to reset.

5. A reaction device for treating denitrification waste gas in a power plant according to claim 4, characterized in that: The reset component (4035) comprises: A support cylinder (40351) is fixedly connected to the inner wall of the denitration reactor body (1), one end of the support rod (4031) is inserted and arranged inside the support cylinder (40351), and one end of the support rod (4031) is rotatably arranged inside the support cylinder (40351); The torsion spring (40352) is arranged inside the support tube (40351), and the torsion spring (40352) is used to drive the ball (4032) to reset.

6. The reaction device for treating denitrification waste gas in a power plant according to claim 1, characterized in that: The outer wall of the denitration reactor body (1) is provided with a bracket (101) for supporting the denitration reactor body (1), and the top end surface of the denitration reactor body (1) is provided with a connection box (2) for installing an auxiliary nozzle (201).

7. The reaction device for treating denitrification waste gas in a power plant according to claim 1, characterized in that: A catalytic layer (3) is arranged inside the denitration reactor body (1), and an outlet (103) is provided on the bottom end surface of the denitration reactor body (1).

Images