Flue gas denitration ammonia spraying device
By introducing gas guide components and catalytic components into the flue gas denitrification and ammonia spraying device, the mixing and catalytic reaction between ammonia and flue gas is improved, and the problem of unsatisfactory mixing effect in traditional devices is solved, which improves the denitrification efficiency and enhances the practicality of the device.
Patent Information
- Application Number
- CN202421724035.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-19
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-07-19
AI Technical Summary
In the traditional flue gas denitrification and ammonia spraying device, the injection hole design is consistent with the flue gas flow direction, resulting in unsatisfactory mixing effect and reducing the denitrification efficiency of the device.
The gas conduction assembly is used in combination with the catalytic assembly, and ammonia is uniformly introduced into the ventilation duct through the uniform pipe and the gas separation nozzle, and catalytic reaction is carried out using the catalytic fins and the catalytic plate, combining the S-type guide air duct and the mixing baffle to improve the mixing efficiency of ammonia and flue gas.
It effectively improves the mixing effect of ammonia and flue gas, enhances the efficiency of catalytic reaction, thereby improving the denitrification efficiency, and reduces the impact of solid foreign matter on the device through protective filter covers and sewage discharge systems, and extends the service life.
Smart Images
Figure CN223127729U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of flue gas treatment, and particularly to a flue gas denitration ammonia injection device. Background Art
[0002] With the acceleration of the industrialization process, the problem of nitrogen oxide emissions generated by the combustion of fossil fuels such as coal and oil is becoming increasingly serious, posing a huge pressure on the atmospheric environment. As an effective means of nitrogen oxide emission reduction, flue gas denitration technology has received extensive attention and application. Among them, the flue gas denitration ammonia injection device, as an important part of the flue gas denitration system, its technical background and application value are worthy of in-depth discussion.
[0003] The main function of the flue gas denitration ammonia injection device is to accurately inject ammonia water or ammonia gas, so that it reacts chemically with nitrogen oxides in the flue gas, thereby converting nitrogen oxides into harmless nitrogen and water, so as to achieve the purpose of denitration.
[0004] In traditional flue gas denitration ammonia injection devices, the injection holes are generally designed with the injection direction consistent with the flue gas flow direction. This nozzle arrangement usually has an unsatisfactory mixing effect, and it is necessary to increase the flue length to extend the ammonia-air mixing distance, thereby reducing the denitration efficiency of the device. Utility Model Content
[0005] The purpose of this application is to provide a flue gas denitration ammonia injection device to solve the problem that in traditional flue gas denitration ammonia injection devices, the injection holes are generally designed with the injection direction consistent with the flue gas flow direction, which reduces the denitration efficiency of the device.
[0006] To achieve the above object, this application specifically adopts the following technical solutions:
[0007] A flue gas denitration ammonia injection device includes a ventilation duct. One end of the ventilation duct is fixedly connected to a flue gas guiding pipe, and the other end of the ventilation duct is provided with an air outlet. A exhaust fan is fixedly connected inside the air outlet. A plurality of mixing baffles are uniformly and obliquely fixedly connected inside the ventilation duct. Adjacent two of the mixing baffles are arranged staggered inside the ventilation duct, and an S-shaped guiding air duct is formed between adjacent two of the mixing baffles. An air pump is fixedly connected to the top of the ventilation duct. A gas guiding component is installed at the output end of the air pump. A catalytic component is installed on one side of the mixing baffle.
[0008] By adopting the above technical solution, through the combined use of the air guiding component and the catalytic component, when the exhaust fan is started to pump the flue gas through the flue gas guiding pipe and pass through the inside of the ventilation duct, it is convenient to evenly introduce ammonia into the inside of the ventilation duct by using the air guiding component, and make the flue gas fully mix with ammonia when hitting one side of the mixing baffle, and cooperate with the catalytic component to carry out the catalytic reaction, thereby effectively improving the denitration efficiency of the device.
[0009] Further, the air guiding component includes a uniform air pipe fixedly connected to the output end of the air pump. One end of the uniform air pipe is fixedly connected with a plurality of air distribution nozzles evenly. The output end of the air distribution nozzle passes through the ventilation duct and extends to one side of the top of the mixing baffle.
[0010] By adopting the above technical solution, through the combined use of the uniform air pipe and the air distribution nozzles, it is convenient to evenly distribute the ammonia pumped into the ventilation duct by the air pump to the input ends of the plurality of air distribution nozzles by using the uniform air pipe, and cooperate with the plurality of air distribution nozzles to evenly input the ammonia to one side of the plurality of mixing baffles inside the ventilation duct, thereby effectively improving the uniformity of the ammonia input into the ventilation duct.
[0011] Further, the catalytic component includes a catalytic plate fixedly connected to one side of the mixing baffle. One side of the catalytic plate is fixedly connected with a plurality of catalytic fins evenly. The surfaces of the catalytic plate and the catalytic fins are coated with a metal oxide coating.
[0012] By adopting the above technical solution, through the combined use of the catalytic fins and the catalytic plate, it is convenient to use the catalytic fins to cooperate with the metal oxide coating to increase the catalytic reduction area on the surface of the catalytic plate, and thus effectively improve the denitration efficiency of the device.
[0013] Further, protective filter covers are evenly fixedly connected to the inner top of the ventilation duct, and the protective filter covers are wrapped around the periphery of the output ends of the air distribution nozzles.
[0014] By adopting the above technical solution, through the combined use of the protective filter covers and the air distribution nozzles, the influence of solid foreign matters in the flue gas on the air distribution nozzles is effectively reduced, and the practicability of the device is improved.
[0015] Further, an arc-shaped dust collection groove is formed in the inner bottom of the ventilation duct. A sewage auger is rotatably connected to the inside of the arc-shaped dust collection groove. A sewage motor is fixedly connected to one side of the ventilation duct. The output end of the sewage motor is fixedly connected to the sewage auger. A blanking component is installed at one end of the ventilation duct.
[0016] By adopting the above technical solution, through the combined use of the arc-shaped dust collection tank, the sewage auger, and the feeding component, it is convenient for the solid foreign matters in the flue gas to slide down into the interior of the arc-shaped dust collection tank under the action of gravity when passing through the interior of the ventilation duct. Then, by starting the sewage motor to drive the sewage auger to push the solid foreign matters to move along the length direction of the arc-shaped dust collection tank, and cooperating with the feeding component to collect the solid foreign matters, the practicability of the device is effectively improved.
[0017] Further, the feeding component includes a sewage outlet opened at the bottom of the arc-shaped dust collection tank. A sewage box is inserted into the interior of the sewage outlet. One end of the sewage box is symmetrically and fixedly connected with a lock catch. The side of the ventilation duct is symmetrically and fixedly connected with a lock adapted to the lock catch.
[0018] By adopting the above technical solution, through the combined use of the lock catch and the lock, after the foreign matters inside the arc-shaped dust collection tank are pushed into the interior of the sewage box for collection, by unlocking the connection between the lock catch and the lock, the sewage box is separated from the ventilation duct, so as to facilitate taking out the sewage box to clean the solid foreign matters collected inside, and the practicability of the device is improved.
[0019] Further, a filter screen is inclined and fixedly connected to the interior of the ventilation duct. The filter screen is installed on one side of the air outlet.
[0020] By adopting the above technical solution, through the combined use of the filter screen and the air outlet, it is convenient to filter and intercept the gas passing through the air outlet and discharging from the interior of the ventilation duct, so as to effectively reduce the solid foreign matters in the gas from passing through the air outlet and discharging from the interior of the ventilation duct, and further improve the practicability of the device.
[0021] Further, the surface of the protective filter cover, the sewage auger, and the filter screen is coated with a corrosion-resistant resin coating.
[0022] By adopting the above technical solution, by setting the corrosion-resistant resin coating, the corrosion resistance of the surface of the protective filter cover, the sewage auger, and the filter screen is effectively improved, and the service life of the device is prolonged.
[0023] In summary, the present application includes at least the following beneficial effects:
[0024] 1. By the combined use of the air guiding component and the catalytic component, when starting the exhaust fan to pump the flue gas to pass through the interior of the ventilation duct through the flue gas guiding pipe, it is convenient to uniformly introduce ammonia gas into the interior of the ventilation duct by using the air guiding component, and make the flue gas fully mix with the ammonia gas when hitting one side of the mixing baffle, and cooperate with the catalytic component for catalytic reaction, so as to effectively improve the denitrification efficiency of the device.
[0025] 2. By setting the combined use of the arc-shaped dust collection tank with the sewage auger and the feeding component, it is convenient for the solid foreign matters in the flue gas to slide down into the interior of the arc-shaped dust collection tank under the action of gravity when passing through the interior of the ventilation duct. Then, by starting the sewage discharge motor to drive the sewage auger to push the solid foreign matters to move along the length direction of the arc-shaped dust collection tank, and cooperating with the feeding component to collect the solid foreign matters, the practicability of the device is effectively improved. Brief Description of the Drawings
[0026] Figure 1 is a three-dimensional structural schematic diagram of the device main body in the present application.
[0027] Figure 2 is a side sectional view of the device main body in the present application.
[0028] Figure 3 is a front sectional view of the device main body in the present application.
[0029] Description of the Reference Numerals:
[0030] 1, ventilation duct; 2, flue gas guiding pipe; 3, air outlet; 4, exhaust fan; 5, mixing baffle; 6, air pump; 8, air distributing pipe; 9, air distributing nozzle; 10, catalytic plate; 11, catalytic fin; 12, protective filter cover; 13, arc-shaped dust collection tank; 14, sewage auger; 15, sewage discharge motor; 16, sewage outlet; 17, sewage tank; 18, lock; 19, lock; 20, filter screen. Detailed Description of the Embodiment
[0031] The following is a further detailed description of the present application in conjunction with the attached Figures 1-3 Drawings.
[0032] The embodiment of the present application discloses a flue gas denitration ammonia injection device.
[0033] Referring to Figures 1-3 , a flue gas denitration ammonia injection device includes a ventilation duct 1. One end of the ventilation duct 1 is fixedly connected with a flue gas guiding pipe 2, and the other end of the ventilation duct 1 is provided with an air outlet 3. An exhaust fan 4 is fixedly connected inside the air outlet 3. A plurality of mixing baffles 5 are uniformly and obliquely fixedly connected inside the ventilation duct 1. Adjacent two mixing baffles 5 are arranged staggered inside the ventilation duct 1, and an S-shaped guiding air duct is formed between adjacent two mixing baffles 5. An air pump 6 is fixedly connected to the top of the ventilation duct 1. A gas guiding component is installed at the output end of the air pump 6. A catalytic component is installed on one side of the mixing baffle 5;
[0034] Among them, the gas guiding component includes an air distributing pipe 8 fixedly connected to the output end of the air pump 6. One end of the air distributing pipe 8 is uniformly fixedly connected with a plurality of air distributing nozzles 9. The output end of the air distributing nozzle 9 passes through the ventilation duct 1 and extends to one side of the top of the mixing baffle 5;
[0035] Moreover, the catalytic component includes a catalytic plate 10 fixedly connected to one side of the mixing baffle 5. A plurality of catalytic fins 11 are evenly and fixedly connected to one side of the catalytic plate 10. The surfaces of the catalytic plate 10 and the catalytic fins 11 are coated with a metal oxide coating;
[0036] Moreover, protective filters 12 are evenly and fixedly connected to the inner top of the ventilation duct 1. The protective filters 12 are wrapped around the periphery of the output end of the air distribution nozzle 9.
[0037] During use, first, an ammonia storage tank is externally connected to the air pump 6, and ammonia is pumped into the inside of the air distribution pipe 8. In cooperation with the air distribution nozzle 9, the ammonia input into the air distribution pipe 8 by the air pump 6 is evenly sprayed into one side of the mixing baffle 5 inside the ventilation duct 1. At the same time, by starting the exhaust fan 4 and cooperating with the flue gas guiding pipe 2, the flue gas to be treated is sucked into the inside of the ventilation duct 1 and passes through between a plurality of mixing baffles 5, and then is discharged through the exhaust port 3;
[0038] Moreover, while the flue gas passes through the inside of the ventilation duct 1, the flue gas contacts the ammonia sprayed by the air distribution nozzle 9 and collides with the catalytic plate 10 on one side of the mixing baffle 5. At the same time, the flue gas and ammonia collide and mix along the surfaces of the catalytic plate 10 and the catalytic fins 11, and are catalyzed by the metal oxide coating on the surfaces of the catalytic plate 10 and the catalytic fins 11 to produce nitrogen and water. Then, the flue gas and ammonia pass through the S-shaped guiding air duct formed between two adjacent mixing baffles 5, and continuously collide with the catalytic plate 10, improving the mixing efficiency of the flue gas and ammonia. At the same time, by arranging the protective filters 12, the flue gas blowing into the inside of the air distribution nozzle 9 is filtered and intercepted, effectively reducing the blockage of the air distribution nozzle 9 caused by solid foreign matters in the flue gas. In this way, it is convenient to use the cooperation of the mixing baffle 5 and the S-shaped air duct to guide the flue gas and ammonia to fully collide and fuse when passing through the inside of the ventilation duct 1, thereby improving the denitration efficiency of the device.
[0039] Refer to Figure 1 and Figure 2 An arc-shaped dust collection trough 13 is provided at the inner bottom of the ventilation duct 1. A sewage auger 14 is rotatably connected to the inside of the arc-shaped dust collection trough 13. A sewage motor 15 is fixedly connected to one side of the ventilation duct 1. The output end of the sewage motor 15 is fixedly connected to the sewage auger 14. A blanking component is installed at one end of the ventilation duct 1;
[0040] Among them, the blanking component includes a sewage discharge port 16 opened at the bottom of the arc-shaped dust collection trough 13. A sewage discharge box 17 is inserted into the inside of the sewage discharge port 16. A lock 18 is symmetrically and fixedly connected to one end of the sewage discharge box 17. Locks 19 adapted to the locks 18 are symmetrically and fixedly connected to one side of the ventilation duct 1;
[0041] Moreover, a filter screen 20 is inclined and fixedly connected to the inside of the ventilation duct 1. The filter screen 20 is installed on one side of the exhaust port 3.
[0042] During use, when the flue gas and ammonia pass through the inside of the ventilation duct 1, solid foreign matters in the flue gas are filtered and intercepted by the filter net 20. Then, under the action of gravity, the solid foreign matters slide down along the inner wall of the ventilation duct 1 into the inside of the arc-shaped dust collection tank 13. Next, by starting the sewage discharge motor 15 to drive the sewage discharge auger 14 to rotate, the sewage discharge auger 14 pushes the solid foreign matters collected inside the arc-shaped dust collection tank 13 towards the inside of the sewage discharge port 16. At the same time, using gravity, the solid foreign matters pass through the sewage discharge port 16 and fall into the inside of the sewage discharge tank 17 for collection. Then, by pulling the buckle 18 to release the buckling with the lock 19, the sewage discharge tank 17 is disengaged from the fixed connection with the ventilation duct 1, so as to facilitate the cleaning of the solid foreign matters collected inside the sewage discharge tank 17. In this way, by using the cooperation of the sewage discharge auger 14 and the arc-shaped dust collection tank 13, the solid foreign matters inside the ventilation duct 1 are pushed into the inside of the sewage discharge tank 17 for collection, effectively improving the practicability of the device.
[0043] Refer to Figure 1 and Figure 2 The surfaces of the protective filter cover 12, the sewage discharge auger 14, and the filter net 20 are coated with a corrosion-resistant resin coating.
[0044] During use, by coating a corrosion-resistant resin coating on the surfaces of the protective filter cover 12, the sewage discharge auger 14, and the filter net 20, a corrosion-resistant protective layer is formed on the surfaces of the protective filter cover 12, the sewage discharge auger 14, and the filter net 20. Thus, the corrosion resistance of the surfaces of the protective filter cover 12, the sewage discharge auger 14, and the filter net 20 is effectively improved, and the service life of the device is prolonged.
[0045] The implementation principle of a flue gas denitrification ammonia injection device in this embodiment is as follows: First, an ammonia storage tank is externally connected to the gas pump 6, and ammonia is pumped into the inside of the air distribution pipe 8. In cooperation with the air distribution nozzle 9, the ammonia input into the inside of the air distribution pipe 8 by the gas pump 6 is evenly sprayed into the inside of the ventilation duct 1 on one side of the mixing baffle 5. At the same time, by starting the exhaust fan 4 and cooperating with the flue gas guiding pipe 2, the flue gas to be treated is sucked into the inside of the ventilation duct 1 and passes through between multiple mixing baffles 5, and then is discharged through the exhaust port 3;
[0046] And while the flue gas passes through the inside of the ventilation duct 1, the flue gas contacts the ammonia sprayed by the air distribution nozzle 9 and collides with the catalytic plate 10 on one side of the mixing baffle 5. At the same time, the flue gas and ammonia collide and mix along the surfaces of the catalytic plate 10 and the catalytic fins 11, and are catalyzed by the metal oxide coating on the surfaces of the catalytic plate 10 and the catalytic fins 11 to produce nitrogen and water. Then, the flue gas and ammonia pass through the S-shaped guiding air duct formed between two adjacent mixing baffles 5 and continuously collide with the catalytic plate 10, improving the mixing efficiency of the flue gas and ammonia;
[0047] Meanwhile, when the flue gas and ammonia gas pass through the inside of the ventilation duct 1, the solid foreign matters in the flue gas are filtered and intercepted by the filter net 20. Thus, under the action of gravity, the solid foreign matters slide down along the inner wall of the ventilation duct 1 into the inside of the arc-shaped dust collecting tank 13. Then, by starting the sewage discharge motor 15 to drive the sewage discharge auger 14 to rotate, the sewage discharge auger 14 pushes the solid foreign matters collected inside the arc-shaped dust collecting tank 13 to move towards the inside of the sewage discharge port 16. At the same time, the solid foreign matters fall into the inside of the sewage discharge tank 17 through the sewage discharge port 16 by means of gravity for collection. Then, by pulling the latch 18 to release the buckling with the lock 19, the sewage discharge tank 17 is disengaged from the fixed connection with the ventilation duct 1, so as to facilitate the cleaning of the solid foreign matters collected inside the sewage discharge tank 17.
Claims
1. A flue gas denitrification ammonia injection device, comprising a ventilation duct (1), characterized in that: One end of the ventilation duct (1) is fixedly connected to a flue gas guiding pipe (2), and the other end of the ventilation duct (1) is provided with an air outlet (3). An exhaust fan (4) is fixedly connected inside the air outlet (3). A plurality of mixing baffles (5) are uniformly and obliquely fixedly connected inside the ventilation duct (1). Adjacent two of the mixing baffles (5) are arranged staggeredly inside the ventilation duct (1), and an S-shaped guiding air duct is formed between adjacent two of the mixing baffles (5). An air pump (6) is fixedly connected to the top of the ventilation duct (1). A gas guiding component is installed at the output end of the air pump (6), and a catalytic component is installed on one side of the mixing baffle (5).
2. The ammonia injection device for flue gas denitration according to claim 1, characterized in that: The gas guiding component includes a uniform air pipe (8) fixedly connected to the output end of the air pump (6). A plurality of air distribution nozzles (9) are uniformly and fixedly connected to one end of the uniform air pipe (8). The output end of the air distribution nozzle (9) passes through the ventilation duct (1) and extends to one side of the top of the mixing baffle (5).
3. The ammonia injection device for flue gas denitrification according to claim 1, characterized in that: The catalytic component includes a catalytic plate (10) fixedly connected to one side of the mixing baffle (5). A plurality of catalytic fins (11) are uniformly and fixedly connected to one side of the catalytic plate (10). The surfaces of the catalytic plate (10) and the catalytic fins (11) are coated with a metal oxide coating.
4. The ammonia injection device for flue gas denitrification according to claim 1, characterized in that: A plurality of protective filters (12) are uniformly and fixedly connected to the inner top of the ventilation duct (1). The protective filters (12) wrap around the periphery of the output end of the air distribution nozzle (9).
5. The ammonia injection device for flue gas denitration according to claim 1, wherein: An arc-shaped dust collecting trough (13) is opened at the inner bottom of the ventilation duct (1). A sewage auger (14) is rotatably connected inside the arc-shaped dust collecting trough (13). A sewage discharge motor (15) is fixedly connected to one side of the ventilation duct (1). The output end of the sewage discharge motor (15) is fixedly connected to the sewage auger (14). A blanking component is installed at one end of the ventilation duct (1).
6. The ammonia injection device for flue gas denitrification according to claim 5, characterized in that: The blanking component includes a sewage discharge port (16) opened at the bottom of the arc-shaped dust collecting trough (13). A sewage discharge box (17) is inserted inside the sewage discharge port (16). Two locking latches (18) are symmetrically and fixedly connected to one end of the sewage discharge box (17). Two locks (19) adapted to the locking latches (18) are symmetrically and fixedly connected to one side of the ventilation duct (1).
7. The flue gas denitration ammonia injection device according to claim 1, characterized in that: A filter net (20) is obliquely fixedly connected inside the ventilation duct (1). The filter net (20) is installed on one side of the air outlet (3).
8. A flue gas denitration ammonia injection device according to claim 4, characterized in that: The surfaces of the protective filters (12), the sewage auger (14), and the filter net (20) are coated with a corrosion-resistant resin coating.