Intelligent ammonia spraying device for flue gas denitration
Through the filtering components and ammonia spraying mechanism of the intelligent ammonia spraying device, the problem that ammonia gas cannot be evenly mixed with flue gas in traditional ammonia spraying systems is solved, achieving more efficient denitrification effect and environmental protection.
Patent Information
- Application Number
- CN202420792321.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-17
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-04-17
AI Technical Summary
In traditional ammonia spraying systems, the ammonia gas cannot be mixed evenly with the flue gas, resulting in unsatisfactory denitrification and may lead to ammonia escape and environmental pollution.
An intelligent ammonia spraying device is designed, including a filter assembly and an ammonia spraying mechanism, which filters flue gas particles through the filter assembly. The ammonia spraying mechanism adopts a rotating nozzle and an adjustable baffle to ensure uniform distribution of ammonia and control the spray range.
It improves the uniform contact between nitrogen oxides and ammonia, enhances the denitrification efficiency, reduces ammonia escape, and avoids equipment blockage and increased pressure drop.
Smart Images
Figure CN222131485U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of denitration, in particular to an intelligent ammonia spraying device for flue gas denitration. Background Art
[0002] The ammonia injection device for flue gas denitrification is a highly efficient and environmentally friendly device used in coal-fired power plants or other industrial combustion facilities. It effectively reduces nitrogen oxide (NOx) emissions by precisely controlling the injection of ammonia (or urea aqueous solution).
[0003] In traditional ammonia injection systems, ammonia may not be able to mix evenly with nitrogen oxides in flue gas, resulting in unsatisfactory denitrification effects in some areas, which will affect the overall denitrification efficiency and may lead to the presence of local high concentrations of ammonia; and if the amount of ammonia sprayed is too large, unreacted ammonia may escape into the atmosphere, causing environmental pollution; this not only reduces the denitrification efficiency, but may also cause other environmental problems, such as reacting with SO3 to form ammonium bisulfate, resulting in equipment blockage and increased pressure drop. Therefore, an intelligent ammonia injection device for flue gas denitrification is proposed to solve the above problems. Utility Model Content
[0004] In view of the deficiencies in the prior art, the utility model provides an intelligent ammonia spraying device for flue gas denitrification, which has the advantages of adjustable ammonia spraying range and solves the above-mentioned problems.
[0005] To achieve the above object, the utility model provides the following technical solution: an intelligent ammonia spraying device for flue gas denitrification, comprising a pipeline, a filter box is arranged on the top of the pipeline, a filter assembly is arranged inside the filter box, and an ammonia spraying mechanism and a control mechanism are arranged inside the pipeline from top to bottom;
[0006] The ammonia spraying mechanism comprises a fixing frame, the fixing frame is fixedly installed inside the pipeline, a second motor is fixedly installed on the top of the fixing frame, a rotating rod penetrating the middle of the fixing frame is fixedly installed at the output shaft of the second motor, a receiving box is fixedly installed at the bottom of the rotating rod, connecting pipes are installed at equal distances on the outer surface of the receiving box, nozzles are installed at equal distances at the bottom of the connecting pipes, and a rotating joint is rotatably installed at the bottom of the receiving box;
[0007] The control mechanism includes motor three, which is fixedly installed on the left side of the pipeline, a screw rod rotatably connected to the right inner wall of the pipeline is fixedly installed at the output shaft of motor three, a sliding rod is fixedly installed inside the pipeline, a sliding seat is movably installed at equal distances on the outer surfaces of the screw rod and the sliding rod, a baffle is hinged at the bottom of the sliding seat, a sliding opening is opened inside the baffle, and a round rod movably connected to the inside of the sliding opening is fixedly installed on the rear inner wall of the pipeline.
[0008] Furthermore, the filter assembly includes a filter screen, the filter screen is movably installed inside the filter box, connecting parts are provided at both ends of the bottom of the filter screen, a motor 1 is fixedly installed on the rear side of the filter box, and a cam located at the bottom of the filter screen is fixedly installed at the output shaft of the motor 1.
[0009] Furthermore, the number of the connecting pipes is seven, and the seven connecting pipes are distributed in a ring shape on the outer surface of the rotating rod with the rotating rod as the center. The bottom of the rotating joint is connected to a hydrogen inlet pipe extending to the outside of the pipeline.
[0010] Furthermore, the number of the slide seats, baffles, sliding ports and round rods is five, the five slide seats are all threadedly connected to the screw rod, and the five slide seats are all slidably connected to the slide rod.
[0011] Furthermore, the two connecting members each include a fixing block and a spring, the fixing blocks are fixedly installed on the left and right inner walls of the pipeline, and the springs are fixedly installed between the two ends of the bottom of the filter screen and the two fixing blocks.
[0012] Furthermore, the filter screen is arranged at an angle, and a waste pipe is arranged on the right side wall of the pipeline.
[0013] Compared with the prior art, the technical solution of this application has the following beneficial effects:
[0014] 1. The intelligent ammonia spraying device for flue gas denitrification can filter the particles carried in the flue gas entering the pipeline by setting a filtering component, and can achieve the effect of automatically cleaning the filter. The particles on the filter can be discharged through the exhaust pipe to prevent the particles in the flue gas from entering the interior of the pipeline and causing nozzle blockage.
[0015] 2. The intelligent ammonia spraying device for flue gas denitrification is equipped with an ammonia spraying mechanism. Multiple connecting pipes can be rotated to spray ammonia. The rotating nozzle can efficiently complete the spraying task and ensure that the ammonia is evenly distributed in the pipeline.
[0016] 3. The intelligent ammonia spraying device for flue gas denitrification can control the long and short range of ammonia sprayed from the ammonia spraying mechanism and the spraying amount by setting a control mechanism. By adjusting the inclination angles of multiple baffles, the spraying range and distribution of ammonia can be changed, so that ammonia and nitrogen oxides in the flue gas can be more evenly contacted, thereby improving the efficiency of the chemical reaction and the denitrification effect; when the multiple baffles are in a vertical state, the spraying range is the farthest, which helps to achieve better coverage when the flue gas flow rate is fast, and when the baffles are tilted, the spraying distance is shortened, which can reduce the situation where ammonia fails to fully react and escapes due to excessive distance. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1It is a schematic diagram of the structure of the utility model;
[0018] Figure 2 It is a partial structural schematic diagram of the ammonia spraying mechanism of the utility model;
[0019] Figure 3 For this utility model Figure 1 A magnified view of the structure in the middle.
[0020] In the figure: 1. pipeline; 2. filter box; 3. filter assembly; 301. filter screen; 302. connector; 303. motor one; 304. cam; 4. ammonia spraying mechanism; 401. fixing bracket; 402. motor two; 403. rotating rod; 404. connecting pipe; 405. nozzle; 406. containing box; 407. rotary joint; 5. control mechanism; 501. motor three; 502. screw rod; 503. sliding rod; 504. sliding seat; 505. baffle; 506. sliding mouth; 507. round rod. DETAILED DESCRIPTION
[0021] 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.
[0022] See also Figure 1-3 In this embodiment, an intelligent ammonia spraying device for flue gas denitrification includes a pipeline 1, a filter box 2 is arranged on the top of the pipeline 1, a filter assembly 3 is arranged inside the filter box 2, and an ammonia spraying mechanism 4 and a control mechanism 5 are arranged inside the pipeline 1 from top to bottom.
[0023] The filter assembly 3 includes a filter screen 301, the filter screen 301 is movably installed inside the filter box 2, and connecting parts 302 are provided at both ends of the bottom of the filter screen 301. A motor 303 is fixedly installed on the rear side of the filter box 2, and a cam 304 located at the bottom of the filter screen 301 is fixedly installed at the output shaft of the motor 303.
[0024] By setting the filter 301, the effect of filtering the particulate matter in the smoke is achieved to prevent the particulate matter from entering the pipe 1. Under the action of the motor 303 and the cam 304, the filter 301 can be shaken through the connecting piece 302 to achieve automatic cleaning of the filter 301.
[0025] The two connectors 302 each include a fixing block and a spring. The fixing blocks are fixedly mounted on the left and right inner walls of the pipe 1, and springs are fixedly mounted between the two ends of the bottom of the filter 301 and the two fixing blocks.
[0026] The connecting member 302 elastically supports the filter 301 so that the filter 301 can be in a shaking state, thereby preventing the filter 301 from being blocked and ensuring the filtering effect.
[0027] The filter screen 301 is arranged at an angle, and a waste discharge pipe is arranged on the right side wall of the pipeline 1, and the particles intercepted by the filter screen 301 can be discharged through the waste discharge pipe.
[0028] The ammonia spraying mechanism 4 includes a fixing frame 401, the fixing frame 401 is fixedly installed inside the pipeline 1, a motor 2 402 is fixedly installed on the top of the fixing frame 401, a rotating rod 403 that runs through the middle of the fixing frame 401 is fixedly installed at the output shaft of the motor 2 402, a receiving box 406 is fixedly installed at the bottom of the rotating rod 403, connecting pipes 404 are installed at equal distances on the outer surface of the receiving box 406, nozzles 405 are installed at equal distances at the bottom of the connecting pipes 404, and a rotating joint 407 is rotatably installed at the bottom of the receiving box 406.
[0029] The number of the connecting pipes 404 is seven. By arranging a plurality of connecting pipes 404 and arranging a plurality of nozzles at the bottom of each connecting pipe 404, when the motor 2 402 drives the rotating rod 403 to rotate, hydrogen can be sprayed over a large range.
[0030] The bottom of the rotary joint 407 is connected to a hydrogen inlet pipe extending to the outside of the pipeline 1. By setting the rotary joint 407 and the hydrogen inlet pipe, external hydrogen can be introduced into the containing box 406 through the hydrogen inlet pipe and the rotary joint 407, enter the connecting pipe 404 and be sprayed out through the nozzle 405.
[0031] The control mechanism 5 includes a motor 3 501, which is fixedly installed on the left side of the pipeline 1, a screw rod 502 rotatably connected to the right inner wall of the pipeline 1 is fixedly installed at the output shaft of the motor 3 501, a slide rod 503 is fixedly installed inside the pipeline 1, a slide seat 504 is movably installed at an equal distance on the outer surfaces of the screw rod 502 and the slide rod 503, a baffle plate 505 is hinged at the bottom of the slide seat 504, a slide opening 506 is opened inside the baffle plate 505, and a round rod 507 movably connected to the inside of the slide opening 506 is fixedly installed on the rear inner wall of the pipeline 1.
[0032] The number of slides 504, baffles 505, sliding openings 506 and round rods 507 are all five. By setting multiple slides 504 and baffles 505, when the motor 3 501 drives the screw rod 502 to rotate, the movement of the multiple slides 504 can drive the baffles 505 to move.
[0033] The five sliding openings 506 are all movably connected to the round rod 507. With the cooperation of the sliding openings 506 and the round rod 507, the movement of the baffle 505 is limited, so that the angle of the baffle 505 changes, and the distance and spraying amount of hydrogen spraying can be adjusted and controlled according to actual needs.
[0034] When implementing, follow these steps:
[0035] 1) First, smoke enters the filter box 2, and the particles in the smoke are intercepted on the filter screen 301, and are discharged along the slope of the filter screen 301 through the exhaust pipe, and the smoke enters the pipeline 1;
[0036] 2) When cleaning the filter 301, the motor 303 drives the cam 304 to rotate, so that the filter 301 is shaken under the expansion and contraction of the two springs, and the impurities on the filter 301 are shaken off;
[0037] 3) The flue gas enters the pipe 1, the motor 2 402 drives the rotating rod 403 to rotate, the rotating rod 403 drives the multiple connecting pipes 404 to rotate, thereby driving the nozzle 405 to rotate and spray the ammonia gas;
[0038] 4) Finally, the spraying range and amount of ammonia are adjusted through the control mechanism 5, and the motor 501 drives the screw rod 502 to rotate, so that the multiple slide seats 504 move horizontally under the limit of the slide rod 503. With the cooperation of the slide 506 and the round rod 507, the inclination angle of the multiple baffles 505 is changed to change the distribution of hydrogen. When the multiple baffles 505 are vertical, the spraying range is the farthest, which is suitable for the situation of faster flue gas flow rate. When the baffles 505 are tilted, the spraying distance is shortened to reduce hydrogen escape.
[0039] To sum up, the intelligent ammonia spraying device for flue gas denitrification can filter the particles carried in the flue gas entering the pipe 1 by setting the filter component 3, and can achieve the effect of automatically cleaning the filter 301. The particles on the filter 301 can be discharged through the exhaust pipe to prevent the particles in the flue gas from entering the interior of the pipe 1 and causing the nozzle 405 to be blocked.
[0040] Furthermore, by providing an ammonia spraying mechanism 4 , a plurality of connecting pipes 404 can be rotated to spray ammonia, and the rotating nozzle can efficiently complete the spraying task, ensuring that the ammonia is evenly distributed in the pipeline 1 .
[0041] Moreover, by setting up the control mechanism 5, the ammonia sprayed from the ammonia spraying mechanism 4 can be controlled in a long and short range, as well as the spraying amount. By adjusting the inclination angles of the multiple baffles 505, the spraying range and distribution of the ammonia can be changed, so that the ammonia and the nitrogen oxides in the flue gas can be more evenly contacted, thereby improving the efficiency of the chemical reaction and the denitrification effect; when the multiple baffles 505 are in a vertical state, the spraying range is the farthest, which helps to achieve better coverage when the flue gas flow rate is fast, and when the baffles 505 are tilted, the spraying distance is shortened, which can reduce the situation where the ammonia fails to fully react and escapes due to the long distance.
[0042] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.
[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. An intelligent ammonia spraying device for flue gas denitrification, comprising a pipeline (1), Features: A filter box (2) is arranged at the top of the pipeline (1), a filter assembly (3) is arranged inside the filter box (2), and an ammonia spraying mechanism (4) and a control mechanism (5) are arranged inside the pipeline (1) from top to bottom; The ammonia spraying mechanism (4) comprises a fixed frame (401), the fixed frame (401) is fixedly installed inside the pipeline (1), a second motor (402) is fixedly installed on the top of the fixed frame (401), a rotating rod (403) penetrating the middle of the fixed frame (401) is fixedly installed at the output shaft of the second motor (402), a receiving box (406) is fixedly installed at the bottom of the rotating rod (403), connecting pipes (404) are installed at equal distances on the outer surface of the receiving box (406), nozzles (405) are installed at equal distances at the bottom of the connecting pipe (404), and a rotating joint (407) is rotatably installed at the bottom of the receiving box (406); The control mechanism (5) comprises a motor three (501), the motor three (501) is fixedly installed on the left side of the pipeline (1), a screw rod (502) rotatably connected to the right inner wall of the pipeline (1) is fixedly installed at the output shaft of the motor three (501), a sliding rod (503) is fixedly installed inside the pipeline (1), a sliding seat (504) is movably installed at an equal distance on the outer surfaces of the screw rod (502) and the sliding rod (503), a baffle plate (505) is hinged at the bottom of the sliding seat (504), a sliding opening (506) is opened inside the baffle plate (505), and a round rod (507) movably connected to the inside of the sliding opening (506) is fixedly installed on the rear inner wall of the pipeline (1).
2. According to claim 1, an intelligent ammonia spraying device for flue gas denitrification, Features: The filter assembly (3) comprises a filter screen (301), the filter screen (301) is movably mounted inside the filter box (2), connecting pieces (302) are provided at both ends of the bottom of the filter screen (301), a motor (303) is fixedly mounted on the rear side of the filter box (2), and a cam (304) located at the bottom of the filter screen (301) is fixedly mounted at the output shaft of the motor (303).
3. The intelligent ammonia spraying device for flue gas denitrification according to claim 1, Features: The number of the connecting pipes (404) is seven, and the seven connecting pipes (404) are distributed in a ring shape on the outer surface of the rotating rod (403) with the rotating rod (403) as the center. The bottom of the rotating joint (407) is connected to a hydrogen inlet pipe extending to the outside of the pipeline (1).
4. The intelligent ammonia spraying device for flue gas denitrification according to claim 1, Features: The number of the slide seats (504), baffles (505), slide openings (506) and round rods (507) is five, and the five slide seats (504) are all threadedly connected to the screw rod (502), and the five slide seats (504) are all slidably connected to the slide rod (503).
5. The intelligent ammonia spraying device for flue gas denitrification according to claim 2, Features: The two connecting members (302) each comprise a fixing block and a spring. The fixing blocks are fixedly mounted on the left and right inner walls of the pipeline (1). Springs are fixedly mounted between the two ends of the bottom of the filter screen (301) and the two fixing blocks.
6. The intelligent ammonia spraying device for flue gas denitrification according to claim 2, Features: The filter screen (301) is arranged at an angle, and a waste discharge pipe is arranged on the right side wall of the pipeline (1).