Ammonia spraying control structure of SCR (Selective Catalytic Reduction) denitration system

Abstract

The utility model belongs to the technical field of flue gas denitration treatment, and particularly relates to an ammonia spraying control structure of an SCR (Selective Catalytic Reduction) denitration system. Comprising a denitration reactor, a smoke inlet pipe arranged at the top of one side of the denitration reactor, a nitrogen spraying mechanism arranged at the top of the other side of the denitration reactor, a smoke exhaust pipe arranged at the bottom of the denitration reactor, a guide plate arranged in the middle of an inner cavity of the denitration reactor, and a first catalyst layer arranged at the top of the guide plate, the second catalyst layer is arranged at the bottom of the guide plate; the mixing assembly comprises a cover plate arranged at the top of the denitration reactor, a motor arranged at the top of the cover plate, a rotating shaft which is arranged at the output end of the motor and extends into the denitration reactor, a cyclone separator arranged on the surface of the rotating shaft, and stirring blades arranged on the surface of the rotating shaft; the flue gas denitration device is reasonable in structure, and can ensure that nitrogen and flue gas are uniformly mixed in the using process, so that the stability and efficiency of flue gas denitration are realized.

Description

Technical Field

[0001] This utility model relates to the field of flue gas denitrification technology, specifically to an ammonia injection control structure for an SCR denitrification system. Background Technology

[0002] With increasingly stringent environmental protection requirements, emission standards for nitrogen oxides (NOx) in some key areas are becoming increasingly stringent. To achieve higher denitrification efficiency, the primary measure currently employed is to increase the number of catalyst layers. However, the application of catalyst layers suffers from uneven distribution of flue gas flow rate, flue gas temperature, and NOx concentration. If the number of catalyst layers is increased without modifying the existing ammonia injection method, localized ammonia escape exceeding standards can easily occur, leading to the formation of ammonium bisulfate downstream, causing air preheater blockage, and ammonia escaping into the air, resulting in secondary atmospheric pollution. Simultaneously, localized areas with excessively low ammonia concentrations may also occur, insufficient ammonia to react with NOx, causing NOx levels at the outlet to exceed standards and preventing the catalyst from fully utilizing its performance.

[0003] Based on the above problems, we propose a novel ammonia injection control structure for SCR denitrification systems. Summary of the Invention

[0004] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and in the abstract and title of the utility model to avoid obscuring the purpose of this section, the abstract and the title of the utility model, and such simplifications or omissions shall not be used to limit the scope of the present invention.

[0005] In view of the problems existing in the prior art, this utility model is proposed.

[0006] Therefore, the purpose of this utility model is to provide an ammonia injection control structure for an SCR denitrification system, which can ensure uniform mixing of nitrogen and flue gas during use, thereby achieving stable and efficient flue gas denitrification.

[0007] To solve the above-mentioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution:

[0008] An ammonia injection control structure for an SCR denitrification system, comprising:

[0009] The denitrification assembly includes a denitrification reactor, a flue gas inlet pipe located at the top of one side of the denitrification reactor, a nitrogen injection mechanism located at the top of the other side of the denitrification reactor, a flue gas outlet pipe located at the bottom of the denitrification reactor, a guide plate located in the middle of the inner cavity of the denitrification reactor, a first catalyst layer located at the top of the guide plate, and a second catalyst layer located at the bottom of the guide plate.

[0010] The mixing assembly includes a cover plate disposed on top of the denitrification reactor, a motor disposed on top of the cover plate, a rotating shaft disposed at the motor output end and extending into the interior of the denitrification reactor, a cyclone separator disposed on the surface of the rotating shaft, and stirring blades disposed on the surface of the rotating shaft.

[0011] As a preferred embodiment of the ammonia injection control structure of the SCR denitrification system described in this utility model, one end of the flue gas inlet pipe is provided with a connection port.

[0012] As a preferred embodiment of the ammonia injection control structure of the SCR denitrification system described in this utility model, a filter screen is provided in the inner cavity of the exhaust pipe.

[0013] As a preferred embodiment of the ammonia injection control structure of the SCR denitrification system described in this utility model, a soot blower is provided at the bottom of one side of the denitrification reactor.

[0014] As a preferred embodiment of the ammonia injection control structure of the SCR denitrification system described in this utility model, the guide plate is arranged in a wave shape.

[0015] As a preferred embodiment of the ammonia injection control structure of the SCR denitrification system described in this utility model, a nitrogen oxide concentration detector is provided in the middle of one side of the denitrification reactor, and the detection probe of the nitrogen oxide concentration detector extends into the interior of the denitrification reactor.

[0016] In a preferred embodiment of the ammonia injection control structure for an SCR denitrification system described in this utility model, the cyclone separator is located below the nitrogen injection mechanism.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] The motor drives the rotating shaft to rotate, which in turn drives the cyclone separator and stirring blades to rotate. The cyclone separator disperses the nitrogen gas entering the denitrification reactor, and the stirring blades mix the flue gas and nitrogen gas during rotation, which facilitates the subsequent reaction and thus achieves stable and efficient flue gas denitrification. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, I will now describe it in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort. Wherein:

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the guide plate structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the hybrid component structure of this utility model.

[0023] In the diagram: 100 Denitrification component, 110 Denitrification reactor, 120 Flue gas inlet pipe, 130 Flue gas outlet pipe, 140 Nitrogen injection mechanism, 150 First catalyst layer, 160 Guide plate, 170 Second catalyst layer, 200 Mixing component, 210 Cover plate, 220 Motor, 230 Rotating shaft, 240 Cyclone separator, 250 Stirring blades. Detailed Implementation

[0024] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0025] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0026] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views showing the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, in actual manufacturing, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0028] This utility model provides the following technical solution: an ammonia injection control structure for an SCR denitrification system, which can ensure uniform mixing of nitrogen and flue gas during use, thereby achieving stable and efficient flue gas denitrification;

[0029] Figures 1 to 3 The diagram shown is a structural schematic of an embodiment of an SCR denitrification system ammonia injection control structure of the present invention, the main body of which includes a denitrification component 100 and a mixing component 200.

[0030] The denitrification assembly 100 includes a denitrification reactor 110, an inlet pipe 120 installed at the top of one side of the denitrification reactor 110, a nitrogen injection mechanism 140 installed at the top of the other side of the denitrification reactor 110, an exhaust pipe 130 installed at the bottom of the denitrification reactor 110, a guide plate 160 installed in the middle of the inner cavity of the denitrification reactor 110, a first catalyst layer 150 installed at the top of the guide plate 160, and a second catalyst layer 170 installed at the bottom of the guide plate 160; one end of the inlet pipe 120 is equipped with a connection port, and the inner cavity of the exhaust pipe 130 is equipped with a filter screen. A soot blower is installed at the bottom of one side of the denitrification reactor 110, and the guide plate 160 is wavy. A nitrogen oxide concentration detector is installed in the middle of one side of the denitrification reactor 110, and the detection probe of the nitrogen oxide concentration detector extends into the interior of the denitrification reactor 110. Furthermore, the denitrification reactor 110 is used for denitrification reaction, the flue gas inlet pipe 120 is used for flue gas entry, the flue gas outlet pipe 130 is used for flue gas discharge, the nitrogen spraying mechanism 140 is used for spraying nitrogen, the first catalyst layer 150 and the second catalyst layer 170 are used for catalytic reaction, and the guide plate 160 is used for gas diversion.

[0031] The mixing assembly 200 includes a cover plate 210 mounted on top of the denitrification reactor 110, a motor 220 mounted on top of the cover plate 210, a rotating shaft 230 mounted on the output end of the motor 220 and extending into the interior of the denitrification reactor 110, a cyclone separator 240 mounted on the surface of the rotating shaft 230, and stirring blades 250 mounted on the surface of the rotating shaft 230. The cyclone separator 240 is located below the nitrogen injection mechanism 140. Furthermore, the cover plate 210 is used to support the motor 220, the motor 220 is used to drive the rotating shaft 230 to rotate, the rotating shaft 230 is used to drive the cyclone separator 240 and the stirring blades 250 to rotate, the cyclone separator 240 is used to disperse nitrogen to facilitate mixing with flue gas, and the stirring blades 250 are used to mix flue gas and nitrogen.

[0032] Combination Figure 1-Figure 3 The specific principle of the ammonia injection control structure of the SCR denitrification system in this embodiment is as follows: the motor 220 drives the rotating shaft 230 to rotate, the rotating shaft 230 drives the cyclone separator 240 and the stirring blade 250 to rotate. The cyclone separator 240 disperses the nitrogen gas entering the denitrification reactor 110. During the rotation of the stirring blade 250, the flue gas and nitrogen gas are mixed to facilitate subsequent full reaction, thereby achieving stable and efficient flue gas denitrification.

[0033] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An ammonia injection control structure for an SCR denitrification system, characterized in that, include: The denitrification assembly (100) includes a denitrification reactor (110), a flue gas inlet pipe (120) disposed on the top of one side of the denitrification reactor (110), a nitrogen injection mechanism (140) disposed on the top of the other side of the denitrification reactor (110), a flue gas outlet pipe (130) disposed at the bottom of the denitrification reactor (110), a guide plate (160) disposed in the middle of the inner cavity of the denitrification reactor (110), a first catalyst layer (150) disposed on the top of the guide plate (160), and a second catalyst layer (170) disposed at the bottom of the guide plate (160). The mixing assembly (200) includes a cover plate (210) disposed on top of the denitrification reactor (110), a motor (220) disposed on top of the cover plate (210), a rotating shaft (230) disposed at the output end of the motor (220) and extending into the interior of the denitrification reactor (110), a cyclone separator (240) disposed on the surface of the rotating shaft (230), and stirring blades (250) disposed on the surface of the rotating shaft (230).

2. The ammonia injection control structure for an SCR denitrification system according to claim 1, characterized in that: One end of the smoke inlet pipe (120) is provided with a connection port.

3. The ammonia injection control structure for an SCR denitrification system according to claim 1, characterized in that: The inner cavity of the exhaust pipe (130) is equipped with a filter screen.

4. The ammonia injection control structure for an SCR denitrification system according to claim 1, characterized in that: A soot blower is provided at the bottom of one side of the denitrification reactor (110).

5. The ammonia injection control structure for an SCR denitrification system according to claim 1, characterized in that: The guide plate (160) is arranged in a wave shape.

6. The ammonia injection control structure for an SCR denitrification system according to claim 1, characterized in that: A nitrogen oxide concentration detector is provided in the middle of one side of the denitrification reactor (110), and the detection probe of the nitrogen oxide concentration detector extends into the interior of the denitrification reactor (110).

7. The ammonia injection control structure for an SCR denitrification system according to claim 1, characterized in that: The cyclone separator (240) is located below the nitrogen injection mechanism (140).

Images