Flue gas denitration ammonia injection grid device
Through the design of the bracket and diffusion mechanism, the problem of uneven ammonia spraying in the existing flue gas denitrification ammonia spray grid device is solved, the uniform distribution of ammonia in the flue gas is achieved, and the denitrification efficiency and reaction effect are improved.
Patent Information
- Application Number
- CN202422616926.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-29
- Publication Date
- 2025-09-23
- Estimated Expiration
- 2034-10-29
AI Technical Summary
The ammonia spraying in the existing flue gas denitrification ammonia injection grid device is fixed and uneven, resulting in large differences in reaction effects and low treatment efficiency.
It uses components such as bracket, motor, half gear, bidirectional toothed slider and diffusion mechanism, and ensures the uniform distribution of ammonia in the flue gas flow through the movement and diffusion design, thereby improving the denitrification efficiency.
It achieves uniform distribution of ammonia in the flue gas, improves the denitrification reaction effect, reduces flow resistance, enhances reaction uniformity, avoids local excess and deficiency of ammonia, and improves treatment efficiency.
Smart Images
Figure CN223366638U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of ammonia injection grids, in particular to a flue gas denitration ammonia injection grid device. Background Art
[0002] The flue gas denitrification ammonia injection grid device is an important equipment used in the flue gas denitrification process. Its main function is to evenly spray ammonia into the flue gas to reduce the emission of nitrogen oxides. The working principle is to spray ammonia into the flue gas flow through a nozzle. Ammonia reacts chemically with nitrogen oxides to produce harmless nitrogen and water. The grid design helps to disperse and guide the flue gas flow, ensuring that ammonia is evenly diffused throughout the flue gas flow.
[0003] The application field of flue gas denitrification ammonia injection grid device is relatively wide. It is widely used in the flue gas treatment of coal-fired power plants in the power industry, for the denitrification of various industrial boilers in industrial boilers, and helps reduce the industry's nitrogen oxide emissions in the cement and metallurgical industries. The flue gas denitrification ammonia injection grid device plays an important role in environmental protection and emission control, helping enterprises achieve higher emission standards, and can adapt to different flue gas flow and composition changes to maintain a stable denitrification effect.
[0004] Flue gas denitrification ammonia spray grid devices are used in coal-fired power plants to reduce nitrogen oxide emissions generated by coal combustion to meet environmental protection regulations. They are used in various industrial boiler equipment in industrial boilers to help reduce nitrogen oxide emissions and improve environmental protection performance. The existing flue gas denitrification ammonia spray grid devices are fixedly installed on the equipment in use. The ammonia spray is fixed and uneven, which will cause local ammonia excess and deficiency. The ammonia concentration in each reaction area is different, the reaction effect varies greatly, and the treatment efficiency is low. Utility Model Content
[0005] In order to make up for the above shortcomings, the utility model provides a flue gas denitrification ammonia spraying grid device, which aims to improve the problems in the prior art of fixed and uneven ammonia spraying and large differences in reaction effects.
[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions: a flue gas denitrification ammonia spraying grid device, comprising a bracket, the top of the bracket is fixedly connected to a motor, the output end of the motor is fixedly connected to a half gear, the top lower side of the bracket is slidably connected to a two-way toothed slider, the outer wall of the half gear is meshingly connected to the inner wall of the two-way toothed slider, the left and right sides of the bottom of the two-way toothed slider are fixedly connected to connecting blocks, the bottom of the connecting block is fixedly connected to the ammonia outlet grid, the bottom of the ammonia outlet grid is fixedly connected to a moving block, a long slide rail is provided on the top upper side of the bracket, the inner wall of the long slide rail is slidably connected to the outer wall of the moving block, the middle part of the ammonia outlet grid is fixedly connected to an ammonia delivery cross pipe, and the front side of the ammonia outlet grid is evenly provided with a diffusion mechanism, which is used for diffusion and propagation.
[0007] As a further description of the above technical solution:
[0008] The diffusion mechanism includes an air outlet pipe, the rear side of the air outlet pipe is fixedly connected to the front side of the ammonia outlet grid, the inner wall of the air outlet pipe is fixedly connected to a connecting ring, the front outer wall of the connecting ring is provided with an annular slide rail, the outer wall of the annular slide rail is slidably connected to an annular slider, the outer wall of the annular slider is fixedly connected to a swivel, the outer wall of the swivel is fixedly connected to a diffusion fan, and the front end of the diffusion fan is provided with an overflow port.
[0009] As a further description of the above technical solution:
[0010] The right side of the bracket is fixedly connected with a right limiting ring, and the inner wall of the right limiting ring is slidably connected with a right ammonia inlet pipe.
[0011] As a further description of the above technical solution:
[0012] Reinforcement sheets are fixedly connected to the four corners of the bracket, and a protective shell is rotatably connected to the left side of the bracket.
[0013] As a further description of the above technical solution:
[0014] The left side of the bracket is fixedly connected with a left limiting ring, and the inner wall of the left limiting ring is slidably connected with a left ammonia inlet pipe.
[0015] As a further description of the above technical solution:
[0016] A controller is fixedly connected to the left side of the bracket, and the controller is electrically connected to the motor.
[0017] As a further description of the above technical solution:
[0018] The left side of the bracket is fixedly connected with a second bolt, and the second bolt is threadedly connected with an indicator plate.
[0019] As a further description of the above technical solution:
[0020] The bottom of the bracket is fixedly connected with a mounting plate, and the front and rear sides of the mounting plate are both threadedly connected with bolts 1.
[0021] The utility model has the following beneficial effects:
[0022] 1. In the present invention, when ammonia spraying is required, the controller is started to drive the motor to start working, the half gear starts to rotate, and the bidirectional toothed slider meshing with it moves left and right, driving the ammonia grid to move right through the connecting block. By moving back and forth left and right, the uniform distribution of the sprayed ammonia in the flue gas flow is ensured, the denitrification efficiency is improved, and the reaction effect is enhanced. The mobile design reduces the flow resistance caused by the fixed nozzle and improves the airflow distribution.
[0023] 2. In the present invention, the injection of ammonia needs to be uniform and wide-ranging. Ammonia is carried out through the exhaust pipe and blown through the connecting ring to rotate the diffusion fan. The ammonia is accelerated and diffused by the rotation of the diffusion fan. The diffusion design can ensure the uniform distribution of ammonia in the flue gas, thereby improving the efficiency of the denitrification reaction. Through diffusion, the ammonia concentration in each reaction area is ensured to be appropriate, thereby improving the reaction effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 This is a front perspective view of a bracket of a flue gas denitrification ammonia injection grid device proposed in the utility model;
[0025] Figure 2 This is a left-side perspective view of a bracket of a flue gas denitrification ammonia injection grid device proposed in the present invention;
[0026] Figure 3 This is a bottom view of the ammonia outlet grid of a flue gas denitrification ammonia injection grid device proposed in the utility model;
[0027] Figure 4 This is a diagram showing the partial structure of the moving block of a flue gas denitrification ammonia injection grid device proposed in the utility model;
[0028] Figure 5 This is a partial structural breakdown diagram of the diffusion mechanism of a flue gas denitrification ammonia injection grid device proposed in the utility model.
[0029] Legend:
[0030] 1. Bracket; 2. Diffusion mechanism; 201. Air outlet pipe; 202. Connecting ring; 203. Annular slide rail; 204. Swivel; 205. Annular slider; 206. Diffusion fan; 207. Overflow port; 3. Motor; 4. Half gear; 5. Bidirectional toothed slider; 6. Connecting block; 7. Ammonia outlet grid; 8. Moving block; 9. Long slide rail; 10. Ammonia delivery horizontal pipe; 11. Right ammonia inlet pipe; 12. Right limiting ring; 13. Reinforcement plate; 14. Mounting plate; 15. Bolt 1; 16. Instruction plate; 17. Bolt 2; 18. Controller; 19. Protective shell; 20. Left ammonia inlet pipe; 21. Left limiting ring. DETAILED DESCRIPTION
[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0032] Please see the attached Figure 1 , Attachment Figure 3 and attached Figure 4 The utility model provides an embodiment: a flue gas denitrification ammonia spraying grid device, including a bracket 1, the top of the bracket 1 is fixedly connected to a motor 3, the output end of the motor 3 is fixedly connected to a half gear 4, the top lower side of the bracket 1 is slidably connected to a two-way toothed slider 5, the outer wall of the half gear 4 is meshingly connected to the inner wall of the two-way toothed slider 5, the bottom left and right sides of the two-way toothed slider 5 are fixedly connected to connecting blocks 6, the bottom of the connecting block 6 is fixedly connected to an ammonia outlet grid 7, the bottom of the ammonia outlet grid 7 is fixedly connected to a moving block 8, and the top upper side of the bracket 1 is provided with a Long slide rail 9, the inner wall of the long slide rail 9 is slidably connected to the outer wall of the moving block 8, and the moving block 8 slides with the long slide rail 9 opened above the top of the bracket 1 to ensure smooth and stable movement. The middle part of the ammonia outlet grid 7 is fixedly connected to the ammonia delivery horizontal pipe 10, and the front side of the ammonia outlet grid 7 is evenly provided with a diffusion mechanism 2. The diffusion mechanism 2 is used for diffusion and propagation. The right side of the bracket 1 is fixedly connected to a right limiting ring 12, and the inner wall of the right limiting ring 12 is slidably connected to the right ammonia inlet pipe 11. The right limiting ring 12 ensures the stability and accuracy of the right ammonia inlet pipe 11 during movement;
[0033] Specifically, the bidirectional toothed slider 5 below the top of the half gear 4 bracket 1 is tightly engaged to achieve power transmission. The connecting block 6 fixes the ammonia outlet grid 7. In order to ensure that the ammonia outlet grid 7 can move smoothly, a moving block 8 is installed at the bottom. The moving block 8 slides with the long slide rail 9 opened above the top of the bracket 1 to ensure smooth and stable movement. The ammonia delivery cross pipe 10 is used to provide ammonia to the grid, and at the front end of the ammonia outlet grid 7, multiple diffusion mechanisms 2 are evenly arranged. The main function of these mechanisms is to optimize the diffusion and propagation effect of ammonia. The right limit ring 12 is slidably connected to the right ammonia inlet pipe 11 to ensure the stability and accuracy of the right ammonia inlet pipe 11 during movement.
[0034] Please see the attached Figure 2 and attached Figure 5The diffusion mechanism 2 includes an air outlet pipe 201, the rear side of the air outlet pipe 201 is fixedly connected to the front side of the ammonia outlet grid 7, the inner wall of the air outlet pipe 201 is fixedly connected to a connecting ring 202, and the front outer wall of the connecting ring 202 is provided with an annular slide rail 203, the outer wall of the annular slide rail 203 is slidably connected to an annular slider 205, and the outer wall of the annular slider 205 is fixedly connected to a swivel 204. The annular slider 205 and the annular slide rail 203 slide smoothly to ensure that ammonia can drive the rotation. The outer wall of the swivel 204 is fixedly connected to a diffusion fan 206, which allows the gas to be evenly dispersed when passing through. An overflow port 207 is provided at the front end of the diffusion fan 206. The four corners of the bracket 1 are fixedly connected with reinforcement plates 13, and the left side of the bracket 1 is rotatably connected to the protective shell 19;
[0035] Specifically, the rear end of the air outlet pipe 201 is tightly connected to the front edge of the ammonia outlet grid 7, ensuring that ammonia can flow in smoothly and stably. The connecting ring 202 provides a solid foundation for the stable operation of the entire mechanism. The surface of the annular slide rail 203 is smooth, serving as a bridge between the connecting ring 202 and the rotating ring 204. The outer wall of the rotating ring 204 is tightly connected to the diffusion fan 206. The diffusion fan 206 allows the gas to be evenly dispersed when passing through. The overflow port 207 enhances the diffusion effect of the gas. The reinforcement sheet 13 enhances the load-bearing capacity and stability of the bracket 1. The protective shell 19 effectively prevents external factors from interfering with and damaging the internal mechanism.
[0036] Please see the attached Figure 1 , Attachment Figure 2 and attached Figure 3 , The left side of the bracket 1 is fixedly connected with a left limiting ring 21, and the inner wall of the left limiting ring 21 is slidably connected with the left ammonia inlet pipe 20. The inner wall of the left limiting ring 21 is smooth and flat, ensuring the smooth sliding connection of the left ammonia inlet pipe 20 therein, which ensures the sealing. The left side of the bracket 1 is fixedly connected with a controller 18, and the controller 18 is electrically connected to the motor 3. The left side of the bracket 1 is fixedly connected with a bolt 2 17, and the bolt 2 17 is threadedly connected with an indicator plate 16. The bottom of the bracket 1 is fixedly connected with a mounting plate 14, and the front and rear sides of the mounting plate 14 are threadedly connected with a bolt 15. The mounting plate 14 has load-bearing capacity and corrosion resistance. The bolt 15 plays a role in firmly installing the bracket 1 in the desired position;
[0037] Specifically, under the guidance of the left limit ring 21, the left ammonia inlet pipe 20 can move accurately along the preset trajectory, thereby realizing precise control of the fluid flow direction. The controller 18 is electrically connected to the motor 3, which can realize real-time monitoring and precise regulation of the operating status of the motor 3. The threaded connection between the bolt 2 17 and the indicator sign 16 firmly fixes the indicator sign 16 on the bracket 1. The mounting plate 14 increases the contact area between the bracket 1 and the mounting surface, and also improves its load-bearing capacity and stability.
[0038] Working principle: When ammonia spraying is required, the start controller 18 drives the motor 3 to start working, the half gear 4 starts to rotate, and the two-way toothed slider 5 meshing with it moves left and right, driving the ammonia outlet grid 7 to move left and right through the connecting block 6. The moving block 8 fixedly connected to the bottom of the ammonia outlet grid 7 restricts the reciprocating movement of the ammonia outlet grid 7 in the long slide rail 9. The reciprocating movement ensures the uniform distribution of the sprayed ammonia in the flue gas flow, improves the denitrification efficiency, can better adapt to the changes in the flue gas flow field, ensures that the ammonia and flue gas are fully in contact, and enhances the reaction effect. The movable design reduces the flow resistance caused by the fixed nozzle and improves the airflow distribution.
[0039] The ammonia needs to be sprayed evenly and over a wide range. The ammonia is brought out through the exhaust pipe 201, blown through the connecting ring 202 to rotate the diffusion fan 206, and the annular slide rail 203 and the annular slider 205 of the rotating ring 204 work together to limit the rotation of the diffusion fan 206. The ammonia is accelerated and diffused by the rotation of the diffusion fan 206. The diffusion design can ensure the uniform distribution of ammonia in the flue gas, thereby improving the efficiency of the denitrification reaction. Through diffusion, local excess and deficiency of ammonia can be avoided, ensuring that the ammonia concentration in each reaction area is appropriate, improving the reaction effect, and uniform diffusion reduces the waste of ammonia and the potential risk of secondary pollution, which is conducive to environmental protection.
[0040] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A flue gas denitrification ammonia injection grid device, comprising a bracket (1), characterized in that: The top of the bracket (1) is fixedly connected to a motor (3), the output end of the motor (3) is fixedly connected to a half gear (4), the lower side of the top of the bracket (1) is slidably connected to a bidirectional toothed slider (5), the outer wall of the half gear (4) is meshingly connected to the inner wall of the bidirectional toothed slider (5), the left and right sides of the bottom of the bidirectional toothed slider (5) are fixedly connected to connecting blocks (6), the bottom of the connecting block (6) is fixedly connected to an ammonia outlet grid (7), the bottom of the ammonia outlet grid (7) is fixedly connected to a moving block (8), a long slide rail (9) is provided on the upper side of the top of the bracket (1), the inner wall of the long slide rail (9) is slidably connected to the outer wall of the moving block (8), the middle of the ammonia outlet grid (7) is fixedly connected to an ammonia delivery transverse pipe (10), and the front side of the ammonia outlet grid (7) is evenly provided with a diffusion mechanism (2), and the diffusion mechanism (2) is used for diffusion and propagation.
2. The flue gas denitrification ammonia injection grid device according to claim 1, characterized in that: The diffusion mechanism (2) comprises an air outlet pipe (201), the rear side of the air outlet pipe (201) is fixedly connected to the front side of the ammonia outlet grid (7), the inner wall of the air outlet pipe (201) is fixedly connected to a connecting ring (202), the front outer wall of the connecting ring (202) is provided with an annular slide rail (203), the outer wall of the annular slide rail (203) is slidably connected to an annular slider (205), the outer wall of the annular slider (205) is fixedly connected to a rotating ring (204), the outer wall of the rotating ring (204) is fixedly connected to a diffusion fan (206), and the front end of the diffusion fan (206) is provided with an overflow port (207).
3. The flue gas denitrification ammonia injection grid device according to claim 1, characterized in that: The right side of the bracket (1) is fixedly connected to a right limiting ring (12), and the inner wall of the right limiting ring (12) is slidably connected to a right ammonia inlet pipe (11).
4. The flue gas denitrification ammonia injection grid device according to claim 1, characterized in that: Reinforcement plates (13) are fixedly connected to the four corners of the bracket (1), and a protective shell (19) is rotatably connected to the left side of the bracket (1).
5. The flue gas denitrification ammonia injection grid device according to claim 1, characterized in that: A left limiting ring (21) is fixedly connected to the left side of the bracket (1), and a left ammonia inlet pipe (20) is slidably connected to the inner wall of the left limiting ring (21).
6. The flue gas denitrification ammonia injection grid device according to claim 1, characterized in that: A controller (18) is fixedly connected to the left side of the bracket (1), and the controller (18) is electrically connected to the motor (3).
7. The flue gas denitrification ammonia injection grid device according to claim 1, characterized in that: The left side of the bracket (1) is fixedly connected with a second bolt (17), and the second bolt (17) is threadedly connected with an indicator plate (16).
8. The flue gas denitrification ammonia injection grid device according to claim 1, characterized in that: The bottom of the bracket (1) is fixedly connected with a mounting plate (14), and the front and rear sides of the mounting plate (14) are both threadedly connected with bolts (15).