A Cement Kiln Precision Ammonia Injection Ultra-Low Emission Denitrification Device

Abstract

This application relates to the technical field of ammonia injection denitrification devices, and discloses a precision ammonia injection ultra-low emission denitrification device for cement kilns. The device includes a reaction tower with a flue gas inlet at its upper end. Grille mounting boxes are installed at the upper and lower ends of the outer surface of the reaction tower. An air inlet pipe is installed at the upper end of the reaction tower, and an exhaust pipe is installed at the lower end. An ammonia injection grille is installed inside the upper grille mounting box, and a grille mounting frame is inserted into the lower grille mounting box. The grille mounting frame has a through hole inside, and a placement ring is installed on the inner wall of the through hole. A flow-rectifying grille is placed on the surface of the placement ring. Return springs are installed inside the four corners of the grille mounting frame, and one end of each return spring has a pressing plate corresponding to the flow-rectifying grille. With this design, when the flow-rectifying grille needs to be replaced, the grille mounting frame can be pulled out from inside the grille mounting box, improving the ease of disassembly and the efficiency of assembly and disassembly.

Description

Technical Field

[0001] This application belongs to the technical field of ammonia injection denitrification devices, specifically a cement kiln precision ammonia injection ultra-low emission denitrification device. Background Technology

[0002] The precision ammonia injection ultra-low emission denitrification device for cement kilns is a key environmental protection equipment in the cement industry. Utilizing advanced precision ammonia injection technology, it intelligently and precisely controls the ammonia injection volume based on the real-time operating status of the cement kiln. During cement production, this device allows ammonia to fully mix and react efficiently with nitrogen oxides, significantly improving denitrification efficiency and thus substantially reducing nitrogen oxide emissions. This helps cement companies easily meet stringent ultra-low emission environmental requirements, promoting the cement industry towards a green and sustainable development path.

[0003] For example, application CN218188870U discloses a cement kiln SNCR precision ammonia injection denitrification device, including a reaction tower. A rectifier grid body is installed inside the reaction tower. Installation mechanisms are provided on both sides of the inner wall of the reaction tower at the bottom of the rectifier grid body. Each installation mechanism includes an installation shell, the outer surface of which is fixedly connected to the reaction tower. A rotating rod is rotatably installed inside the installation shell via bearings. This utility model, by providing an installation mechanism, uses two clamping blocks to clamp the protruding block, thus fixing the rectifier grid body. The installation mechanism also allows for quick disassembly of the rectifier grid body when it is damaged or blocked, facilitating gas dispersion. This solves the problems of existing rectifier grid bodies being difficult to disassemble, and the inconvenience of uniform gas dispersion due to damage or blockage after long-term use.

[0004] However, during the implementation of this application, it was found that when the rectifier grid in the application was disassembled and replaced, the reaction tower needed to be opened to remove the rectifier grid, which reduced work efficiency. Utility Model Content

[0005] The purpose of this application is to provide a cement kiln precision ammonia injection ultra-low emission denitrification device to solve the problem that the reaction tower needs to be opened to remove the rectifier grid when it is disassembled and replaced, which reduces the work efficiency.

[0006] The technical solution adopted in this application is as follows: A cement kiln precision ammonia injection ultra-low emission denitrification device includes a reaction tower. The upper end of the reaction tower is provided with a flue gas inlet. The upper and lower ends of the outer surface of the reaction tower are provided with a grid mounting box. The upper end of the reaction tower is provided with an air inlet pipe. The lower end of the reaction tower is provided with an air extraction pipe. An ammonia injection grid is provided inside the upper grid mounting box. A grid mounting frame is inserted into the lower grid mounting box. A through hole is provided inside the grid mounting frame. A placement ring is provided on the inner wall of the through hole. A rectifier grid is placed on the surface of the placement ring.

[0007] By adopting the above technical solution and design, when the rectifier grille needs to be replaced, the grille mounting frame can be pulled out from the inside of the grille mounting box, which improves the convenience of disassembly and also improves the efficiency of disassembly and assembly.

[0008] As a further description of the above technical solution, a return spring is installed inside the four corners of the grille mounting frame, and one end of the return spring is provided with an extrusion plate corresponding to the rectifier grille.

[0009] By adopting the above technical solution, under the elastic force of the return spring, the extrusion plate can be pushed to abut against the rectifier grille, thereby clamping the rectifier grille and improving stability.

[0010] As a further description of the above technical solution, a connecting rod is provided at one end of the extrusion plate, the connecting rod is disposed inside the reset spring, and electromagnetic blocks corresponding to the connecting rod are installed inside the four corners of the grid mounting frame.

[0011] By adopting the above technical solution, the connecting rod is attracted by the electromagnetic block, thereby causing the extrusion plate to retract into the inside of the grid mounting frame, releasing the clamping of the rectifier grid and improving convenience.

[0012] As a further description of the above technical solution, one side surface of the extrusion plate is engraved with anti-slip texture.

[0013] By adopting the above technical solution, the friction between the extrusion plate and the surface of the rectifier grid is increased by the anti-slip texture, thereby improving the stability of the clamping between the extrusion plate and the rectifier grid.

[0014] As a further description of the above technical solution, the inside of both sides of the grille mounting box is provided with limiting grooves, and the two sides of the grille mounting frame are provided with limiting sliders corresponding to the limiting grooves, and the limiting sliders are slidably connected inside the limiting grooves.

[0015] By adopting the above technical solution, the movement of the grille mounting frame is limited by the sliding limit slider inside the limit groove, making its movement more stable and improving the stability during disassembly and assembly.

[0016] As a further description of the above technical solution, a sealing slot is provided at one end of the grille mounting frame, and a sealing insert plate corresponding to the sealing slot is inserted into the inside of one end of the grille mounting box, and the sealing insert plate is inserted into the inside of the sealing slot.

[0017] By adopting the above technical solution, the sealing insert plate is inserted into the inside of the sealing slot to fix and seal the grid mounting frame, thereby improving stability and sealing performance.

[0018] As a further description of the above technical solution, the surface of the rectifier grille is coated with a polytetrafluoroethylene coating.

[0019] By adopting the above technical solution, it has extremely low surface energy, making it difficult for particulate matter to remain and accumulate on the surface of the rectifier grille, and it is easily carried away by the flue gas, reducing the occurrence of clogging of the rectifier grille. At the same time, it also has good corrosion resistance and high temperature resistance, extending the service life of the rectifier grille.

[0020] In summary, due to the adoption of the above technical solution, the beneficial effects of this application are:

[0021] In this application, pulling the sealing insert upward releases the fixing of the grid mounting frame, pulls the grid mounting frame out, and moves the rectifier grid out of the inside of the reaction tower. Under the action of the electromagnetic block, the connecting rod is attracted, which causes the extrusion plate to retract into the inside of the grid mounting frame, releasing the clamping of the rectifier grid, and the rectifier grid can be taken out, improving convenience and efficiency of disassembly and assembly. Attached Figure Description

[0022] Figure 1 This is a frontal schematic diagram of the reaction tower in this application;

[0023] Figure 2 This is a front structural diagram of the grille mounting device in this application;

[0024] Figure 3 This is a schematic diagram of the planar structure of the limiting device in this application;

[0025] Figure 4 This is a front structural diagram of the extrusion device in this application.

[0026] The markings in the diagram are: 1. Reaction tower; 2. Inlet pipe; 3. Grille mounting box; 4. Extraction pipe; 5. Sealing insert plate; 6. Grille mounting frame; 7. Flue gas inlet; 8. Rectifying grille; 9. Placement ring; 10. Through hole; 11. Limiting slider; 12. Sealing slot; 13. Limiting groove; 14. Electromagnetic block; 15. Return spring; 16. Connecting rod; 17. Extrusion plate. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0029] Example:

[0030] Reference Figure 1-4 A precision ammonia injection ultra-low emission denitrification device for cement kilns includes a reaction tower 1. A flue gas inlet 7 is provided at the upper end of the reaction tower 1. A grid mounting box 3 is installed at the upper and lower ends of the outer surface of the reaction tower 1. An air inlet pipe 2 is installed at the upper end of the reaction tower 1, and an exhaust pipe 4 is installed at the lower end of the reaction tower 1. An ammonia injection grid is installed inside the upper grid mounting box 3, and a grid mounting frame 6 is inserted into the lower grid mounting box 3. A through hole 10 is provided inside the grid mounting frame 6, and a placement ring 9 is provided on the inner wall of the through hole 10. A rectifier grid 8 is placed on the surface of the placement ring 9. With this design, when the rectifier grid 8 needs to be replaced, the grid mounting frame 6 can be pulled out from inside the grid mounting box 3, improving the convenience of disassembly and the efficiency of disassembly and assembly.

[0031] Reference Figure 4 The four corners of the grille mounting frame 6 are equipped with reset springs 15. One end of the reset spring 15 is provided with a pressing plate 17 corresponding to the rectifier grille 8. Under the elastic force of the reset spring 15, the pressing plate 17 can be pushed to abut against the rectifier grille 8, thereby clamping the rectifier grille 8 and improving stability.

[0032] Reference Figure 4 One end of the extrusion plate 17 is provided with a connecting rod 16, which is located inside the return spring 15. Electromagnetic blocks 14 corresponding to the connecting rod 16 are installed inside the four corners of the grille mounting frame 6. Under the action of the electromagnetic blocks 14, the connecting rod 16 is attracted, thereby causing the extrusion plate 17 to retract into the grille mounting frame 6, releasing the clamping of the rectifier grille 8 and improving convenience.

[0033] Reference Figure 4 One side surface of the extrusion plate 17 is engraved with anti-slip texture. The anti-slip texture increases the friction between the extrusion plate 17 and the surface of the rectifier grille 8, thereby improving the stability of the clamping of the extrusion plate 17 and the rectifier grille 8.

[0034] Reference Figure 2-3 The grille mounting box 3 has limit grooves 13 on both sides. The grille mounting frame 6 has limit sliders 11 on both sides corresponding to the limit grooves 13. The limit sliders 11 are slidably connected inside the limit grooves 13. By sliding the limit sliders 11 inside the limit grooves 13, the movement of the grille mounting frame 6 is limited, making its movement more stable and improving the stability during disassembly and assembly.

[0035] Reference Figure 1-2 One end of the grille mounting frame 6 is provided with a sealing slot 12, and a sealing plate 5 corresponding to the sealing slot 12 is inserted into the inside of one end of the grille mounting box 3. The sealing plate 5 is inserted into the inside of the sealing slot 12. Under the action of the sealing plate 5, it is inserted into the inside of the sealing slot 12, thereby fixing and sealing the grille mounting frame 6 and improving stability and sealing performance.

[0036] Reference Figure 2 The surface of the rectifier grille 8 is coated with polytetrafluoroethylene (PTFE), which has extremely low surface energy, making it difficult for particulate matter to remain and accumulate on the surface of the rectifier grille 8. Particulate matter is easily carried away by the flue gas, reducing the likelihood of clogging the rectifier grille 8. At the same time, it also has good corrosion resistance and high-temperature resistance, extending the service life of the rectifier grille 8.

[0037] The implementation principle of the cement kiln precision ammonia injection ultra-low emission denitrification device embodiment of this application is as follows:

[0038] When the rectifier grid 8 needs to be replaced, pull the sealing insert 5 upward to release the fixing of the grid mounting frame 6, pull out the grid mounting frame 6, and move the rectifier grid 8 out of the reaction tower 1. Under the action of the electromagnetic block 14, the connecting rod 16 is attracted, which causes the extrusion plate 17 to retract into the grid mounting frame 6, releasing the clamping of the rectifier grid 8, and the rectifier grid 8 can be taken out, improving convenience and efficiency of disassembly and assembly. The reverse operation can also be used to install the rectifier grid 8.

[0039] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A cement kiln precise ammonia injection ultra-low emission denitration device, comprising a reaction tower (1), characterized in that: The upper end of the reaction tower (1) is provided with a flue gas inlet (7). The upper and lower ends of the outer surface of the reaction tower (1) are provided with a grid mounting box (3). The upper end of the reaction tower (1) is provided with an air inlet pipe (2). The lower end of the reaction tower (1) is provided with an exhaust pipe (4). The upper end of the grid mounting box (3) is provided with an ammonia injection grid. The lower end of the grid mounting box (3) is provided with a grid mounting frame (6). The grid mounting frame (6) is provided with a through hole (10). The inner wall of the through hole (10) is provided with a placement ring (9). The surface of the placement ring (9) is provided with a rectifier grid (8).

2. The device for precise ammonia injection and ultra-low emission denitration of a cement kiln according to claim 1, characterized in that: The four corners of the grid mounting frame (6) are equipped with reset springs (15), and one end of the reset spring (15) is provided with a pressing plate (17) corresponding to the rectifier grid (8).

3. The device for precise ammonia injection and ultra-low emission denitration of a cement kiln according to claim 2, characterized in that: One end of the extrusion plate (17) is provided with a connecting rod (16), the connecting rod (16) is located inside the return spring (15), and electromagnetic blocks (14) corresponding to the connecting rod (16) are installed inside the four corners of the grid mounting frame (6).

4. The device for precise ammonia injection and ultra-low emission denitration of a cement kiln according to claim 2, characterized in that: The extrusion plate (17) has anti-slip texture engraved on one side surface.

5. The device for precise ammonia injection and ultra-low emission denitration of a cement kiln according to claim 1, characterized in that: The grid mounting box (3) has a limiting groove (13) inside both sides. The grid mounting frame (6) has a limiting slider (11) on both sides corresponding to the limiting groove (13). The limiting slider (11) is slidably connected inside the limiting groove (13).

6. The device for precise ammonia injection and ultra-low emission denitration of a cement kiln according to claim 1, characterized in that: A sealing slot (12) is provided at one end of the grille mounting frame (6), and a sealing plate (5) corresponding to the sealing slot (12) is inserted into one end of the grille mounting box (3). The sealing plate (5) is inserted into the inside of the sealing slot (12).

7. The device for precise ammonia injection and ultra-low emission denitration of a cement kiln according to claim 1, characterized in that: The surface of the rectifier grille (8) is coated with polytetrafluoroethylene.

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