Accurate ammonia spraying device for denitration of thermal power plant

Abstract

The utility model relates to the technical field of flue gas denitration, and discloses a thermal power plant denitration accurate ammonia spraying device which comprises a connecting frame, a motor is fixedly connected to the upper surface of the connecting frame, a first gear is fixedly connected to the output end of the motor, a flow dividing box is fixedly connected to the interior of the connecting frame, an ammonia inlet pipeline is fixedly connected to the interior of the flow dividing box, and a second gear is fixedly connected to the output end of the first gear. A limiting pipe is rotationally connected into the flow dividing box, an external rack is fixedly connected to the outer wall of the limiting pipe and is in meshed connection with the first gear, a flow dividing pipe is fixedly connected to the lower surface of the limiting pipe, and a sleeve is arranged in the flow dividing pipe in a penetrating mode. According to the ammonia spraying device, through cooperation of the connecting frame, the motor, the first gear, the flow dividing box, the external rack, the limiting pipe, the flow dividing pipe, the sleeve, the first through hole, the adjusting assembly, the nozzle, the electric push rod and the fixing block, the effect that the device can adapt to the diameter of a smoke exhaust pipeline while the ammonia spraying angle is conveniently adjusted at multiple angles is achieved, and the high efficiency of ammonia spraying operation is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas denitration, in particular to a precise ammonia spraying device for denitration in a thermal power plant. Background Art

[0002] A thermal power plant is a facility that uses fuel combustion to generate heat energy and then converts it into electricity. The nitrogen oxides (NOx) released during its combustion process are one of the main air pollutants. In order to reduce this emission, thermal power plants usually use thermal power plant denitrification precision ammonia injection devices. This technology injects ammonia water into the flue gas to cause a chemical reaction with NOx, converting it into harmless nitrogen and water to comply with environmental regulations and emission standards. The use of denitrification devices not only helps to improve the environmental performance of thermal power plants, increase their competitiveness and sustainable development capabilities, but also improves air quality, reduces adverse effects on human health and the ecological environment, and thus promotes sustainable development.

[0003] The existing ammonia injection device adopts an adjustable movable tube during use. By rotating the rotating block, the rotating block pushes the movable tube to move to the right inside the support tube through the first connecting tube, and the position of the ammonia injection port on the upper and lower sides of the movable tube is adjusted so that the ammonia injection port can be better located in the middle of the exhaust gas flow.

[0004] However, in the use of the prior art, since only a single movable tube is used to spray ammonia inside the flue gas exhaust pipe, but only a single movable tube cannot spray ammonia at a place far away from the side of the movable tube, resulting in the problem that the ammonia spraying operation is not efficient enough and the practicality of the device is reduced. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides a precise ammonia spraying device for denitrification in a thermal power plant, aiming to improve the problem that the ammonia spraying structure adopted in the prior art is relatively single and cannot perform efficient ammonia spraying operations on flue gas.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a precise ammonia injection device for denitration in a thermal power plant comprises a connecting frame, the upper surface of the connecting frame is fixedly connected to a motor, the output end of the motor is fixedly connected to a gear 1, the connecting frame is fixedly connected to a shunt box inside, the shunt box is fixedly connected to an ammonia inlet pipeline inside, the shunt box is rotatably connected to a limit tube inside, the outer wall of the limit tube is fixedly connected to an external rack, the external rack is meshed with a gear 1, the lower surface of the limit tube is fixedly connected to a shunt pipe, the shunt pipe is penetrated by a sleeve, the sleeve penetrates a plurality of through holes 1, the sleeve is provided with an adjustment component, the shunt pipe is fixedly connected to a shunt hose, one end of the shunt hose is fixedly connected to a nozzle, the lower surface of the shunt pipe is fixedly connected to a fixing seat, the lower surface of the fixing seat is fixedly connected to an automatic push rod, the output end of the automatic push rod is fixedly connected to a fixing block, and a connecting rod is rotatably connected between the outer wall of the fixing block and the shunt hose.

[0007] Furthermore, the adjustment component includes an extension tube, which is slidably connected to the inside of the sleeve, and a plurality of through holes are arranged inside the extension tube. A limit block is fixedly connected to the outer wall of the extension tube, and the limit block is slidably connected to the inside of the sleeve.

[0008] Furthermore, a plurality of sleeves are fixedly connected to the outer wall of the connecting frame, and a hinge block is fixedly connected to the upper surface of the sleeve.

[0009] Furthermore, a rack column is slidably connected inside the sleeve, and one end of the rack column is fixedly connected to a mounting frame.

[0010] Furthermore, a resistance block is fixedly connected to one side of the outer wall of the mounting frame, and the resistance block is arranged on one side of the rack column.

[0011] Furthermore, the hinge block is internally rotatably connected with a limit bolt, and the outer wall of the limit bolt is threadedly connected with a nut.

[0012] Furthermore, one side of the outer wall of the nut is in contact with one side of the outer wall of the hinge block, and the outer wall of the limiting bolt is fixedly connected with a second gear, and the second gear is meshedly connected with the rack column.

[0013] Furthermore, the gear 2 is rotatably connected to the inner wall of the hinge block.

[0014] The utility model has the following beneficial effects:

[0015] 1. In the utility model, through the cooperation of the connecting frame, the motor, the gear one, the diverter box, the external rack, the limit tube, the diverter tube, the sleeve, the through hole one, the adjustment component, the nozzle, the electric push rod and the fixed block, the multi-angle adjustment of the ammonia spraying angle can be achieved while adapting to the diameter of the smoke exhaust pipe, thereby improving the efficiency of the ammonia spraying operation.

[0016] 2. In the utility model, by cooperating with the sleeve, the hinge block, the rack column, the mounting bracket, the abutment block, the limit bolt, the nut and the gear 2, the effect of facilitating the installation and fixing of the device according to the size of the smoke exhaust pipe is achieved, thereby improving the practicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a three-dimensional structural schematic diagram of a thermal power plant denitrification precision ammonia injection device proposed by the utility model;

[0018] Figure 2 This is a schematic cross-sectional diagram of a casing of a thermal power plant denitration precision ammonia injection device proposed by the utility model;

[0019] Figure 3 This is a schematic diagram of the gear splitting of a thermal power plant denitrification precision ammonia injection device proposed by the utility model.

[0020] Legend:

[0021] 1. Connecting frame; 2. Motor; 3. Gear 1; 4. Diverter box; 5. Ammonia inlet pipe; 6. Limiting pipe; 7. Diverter pipe; 8. Sleeve; 9. Through hole 1; 10. Adjustment assembly; 1001. Extension pipe; 1002. Through hole 2; 1003. Limiting block; 11. Diverter hose; 12. Nozzle; 13. Fixed seat; 14. Automatic push rod; 15. Fixed block; 16. Connecting rod; 17. Sleeve; 18. Articulated block; 19. Rack column; 20. Mounting frame; 21. Resistance block; 22. Limiting bolt; 23. Nut; 24. Gear 2; 25. External rack. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0023] Reference Figure 1 and Figure 2The utility model provides an embodiment: a precise ammonia injection device for denitration in a thermal power plant, comprising a connecting frame 1, a motor 2 is fixedly connected to the upper surface of the connecting frame 1, a gear 3 is fixedly connected to the output end of the motor 2, a shunt box 4 is fixedly connected inside the connecting frame 1, an ammonia inlet pipeline 5 is fixedly connected inside the shunt box 4, a limiting tube 6 is rotatably connected inside the shunt box 4, an external rack 25 is fixedly connected to the outer wall of the limiting tube 6, the external rack 25 is meshed with the gear 3, a shunt tube 7 is fixedly connected to the lower surface of the limiting tube 6, a sleeve 8 is penetrated inside the shunt tube 7, a plurality of through holes 9 are penetrated inside the sleeve 8, an adjusting component 10 is arranged inside the sleeve 8, and the shunt tube A diversion hose 11 is fixedly connected inside the diversion hose 11, and a nozzle 12 is fixedly connected to one end of the diversion hose 11. A fixing seat 13 is fixedly connected to the lower surface of the diversion pipe 7, and an automatic push rod 14 is fixedly connected to the lower surface of the fixing seat 13. A fixing block 15 is fixedly connected to the output end of the automatic push rod 14, and a connecting rod 16 is rotatably connected between the outer wall of the fixing block 15 and the diversion hose 11; the adjustment component 10 includes an extension tube 1001, the extension tube 1001 is slidably connected to the inside of the sleeve 8, a plurality of through holes 1002 are penetrated inside the extension tube 1001, and a limiting block 1003 is fixedly connected to the outer wall of the extension tube 1001, and the limiting block 1003 is slidably connected to the inside of the sleeve 8;

[0024] Specifically, first, ammonia water is transmitted to the inside of the diversion box 4 through the ammonia inlet pipe 5; at the same time, the motor 2 is started, and it rotates by meshing with the external rack 25 through the gear 13; through the rotation of the motor 2, the limit tube 6 also starts to rotate, thereby driving the diversion tube 7 to rotate; this process achieves the purpose of diverting ammonia water, so that ammonia water can be evenly distributed to various spraying points; in addition, the automatic push rod 14 is also started, and it drives the diversion hose 11 to adjust at multiple angles through the connecting rod 16; the key to this step is to achieve flexible adjustment of the ammonia water spraying angle to adapt to different spraying requirements; through the movement of the diversion hose 11, the nozzle 12 can spray ammonia water at multiple angles, thereby improving the spraying efficiency; by pulling the extension tube 1001, the limit block 1003 can slide on the inner wall of the sleeve 8; the key to this step is to achieve efficient ammonia spraying according to the diameter of the pipeline; through the sliding of the extension tube 1001, the spraying position can be adjusted, so that the ammonia water spraying is more accurate and efficient.

[0025] Reference Figure 1 and Figure 3, the outer wall of the connecting frame 1 is fixedly connected with a plurality of sleeves 17, and the upper surface of the sleeve 17 is fixedly connected with a hinge block 18; a rack column 19 is slidably connected inside the sleeve 17, and one end of the rack column 19 is fixedly connected with a mounting frame 20; a resistance block 21 is fixedly connected to one side of the outer wall of the mounting frame 20, and the resistance block 21 is arranged on one side of the rack column 19; the inner part of the hinge block 18 is rotatably connected with a limit bolt 22, and the outer wall of the limit bolt 22 is threadedly connected with a nut 23; one side of the outer wall of the nut 23 is in contact with one side of the outer wall of the hinge block 18, and the outer wall of the limit bolt 22 is fixedly connected with a gear 24, and the gear 24 is meshed with the rack column 19; the gear 24 is rotatably connected to the inner wall of the hinge block 18;

[0026] Specifically, firstly, the mounting bracket 20 is accurately placed at the appropriate position of the smoke exhaust duct; next, by loosening the nut 23, the position of the mounting bracket 20 can be adjusted so that it fits tightly on the duct; after tightening the nut 23, the next step is to rotate the limit bolt 22; the function of the limit bolt 22 is to control the degree of engagement between the gear 24 and the rack column 19; by accurately adjusting the limit bolt 22, the engagement between the gear 24 and the rack column 19 can be ensured; this engagement mode enables the gear 24 to rotate through the rack column 19; when the gear 24 rotates, the rack column 19 will move along its surface, thereby pushing the abutment block 21; the design of the abutment block 21 enables it to closely contact the inner wall of the duct, in this way, it can adapt to the size of the duct and keep the position of the mounting bracket 20 fixed; after adjusting the position of the abutment block 21, the last step is to tighten the nut 23 again; the purpose of this step is to ensure that the gear 24 is fixed in place, in this way, the mounting bracket 20 can be firmly fixed at the outlet of the smoke exhaust duct.

[0027] Working principle: When the ammonia spraying device is needed, the mounting frame 20 is set up at the outlet of the smoke exhaust pipe. At this time, the nut 23 is loosened, and the limit bolt 22 is rotated to make the gear 24 mesh with the rack column 19 and rotate. The rack column 19 pushes the abutment block 21 to abut against the inner wall of the pipe to adapt to the pipe size and fix it, and then the nut 23 is tightened to fix the gear 24;

[0028] Secondly, when the device is fixed, the ammonia water is transmitted to the inside of the diversion box 4 through the ammonia inlet pipe 5, and the motor 2 is started at the same time, and the motor 2 drives the gear 3 to engage and rotate with the external rack 25, so that the limit tube 6 is rotated, and the diversion tube 7 is rotated by the limit tube 6. At the same time, the automatic push rod 14 is started to drive the connecting rod 16, and then the connecting rod 16 drives the diversion hose 11 to adjust the angles. Through the movement of the diversion hose 11, the nozzle 12 can spray the ammonia water at multiple angles. At the same time, the extension tube 1001 can be pulled to drive the limit block 1003 to slide on the inner wall of the sleeve 8. Through the sliding of the extension tube 1001, the effect of efficient ammonia spraying according to the pipeline diameter can be achieved.

[0029] 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 substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A precise ammonia injection device for denitration in a thermal power plant, comprising a connecting frame (1), characterized in that: The upper surface of the connecting frame (1) is fixedly connected to a motor (2), the output end of the motor (2) is fixedly connected to a gear one (3), the interior of the connecting frame (1) is fixedly connected to a shunt box (4), the interior of the shunt box (4) is fixedly connected to an ammonia inlet pipeline (5), the interior of the shunt box (4) is rotatably connected to a limit tube (6), the outer wall of the limit tube (6) is fixedly connected to an external rack (25), the external rack (25) is meshingly connected to the gear one (3), the lower surface of the limit tube (6) is fixedly connected to a shunt tube (7), the interior of the shunt tube (7) is provided with a sleeve (8) running through it. The sleeve (8) has a plurality of through holes (9) extending therethrough, an adjusting assembly (10) is arranged therein, a diversion hose (11) is fixedly connected thereinto the diversion tube (7), one end of the diversion hose (11) is fixedly connected thereto with a nozzle (12), a fixing seat (13) is fixedly connected to the lower surface of the diversion tube (7), an automatic push rod (14) is fixedly connected to the lower surface of the fixing seat (13), an output end of the automatic push rod (14) is fixedly connected to a fixing block (15), and a connecting rod (16) is rotatably connected between the outer wall of the fixing block (15) and the diversion hose (11).

2. According to claim 1, a thermal power plant denitrification precision ammonia injection device is characterized by: The adjustment component (10) comprises an extension tube (1001), the extension tube (1001) is slidably connected to the inside of the sleeve (8), a plurality of through holes (1002) are provided through the inside of the extension tube (1001), a limit block (1003) is fixedly connected to the outer wall of the extension tube (1001), and the limit block (1003) is slidably connected to the inside of the sleeve (8).

3. A precise ammonia injection device for denitrification in a thermal power plant according to claim 2, characterized in that: A plurality of sleeves (17) are fixedly connected to the outer wall of the connecting frame (1), and a hinge block (18) is fixedly connected to the upper surface of the sleeve (17).

4. A precise ammonia injection device for denitration in a thermal power plant according to claim 3, characterized in that: A rack column (19) is slidably connected inside the sleeve (17), and one end of the rack column (19) is fixedly connected to a mounting frame (20).

5. A precise ammonia injection device for denitrification in a thermal power plant according to claim 4, characterized in that: A resistance block (21) is fixedly connected to one side of the outer wall of the mounting frame (20), and the resistance block (21) is arranged on one side of the rack column (19).

6. A precise ammonia injection device for denitration in a thermal power plant according to claim 5, characterized in that: The hinge block (18) is internally rotatably connected to a limit bolt (22), and the outer wall of the limit bolt (22) is threadedly connected to a nut (23).

7. A precise ammonia injection device for denitrification in a thermal power plant according to claim 6, characterized in that: One side of the outer wall of the nut (23) is in contact with one side of the outer wall of the hinge block (18); the outer wall of the limiting bolt (22) is fixedly connected with a second gear (24); and the second gear (24) is meshingly connected with the rack column (19).

8. A precise ammonia injection device for denitrification in a thermal power plant according to claim 7, characterized in that: The second gear (24) is rotatably connected to the inner wall of the hinge block (18).

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