Industrial kiln flue gas low-temperature denitration device

Abstract

The application discloses a kind of industrial kiln flue gas low-temperature denitration device, it is related to flue gas denitration technical field, including assembly sheath, the inner portion of assembly sheath is respectively equipped with liquid curtain integration mechanism and secondary cooling mechanism, the liquid curtain integration mechanism includes reaction box body, two built-in shelves are fixedly installed between the inner wall top and bottom of reaction box body, the outer surface wall of each built-in shelf is fixedly installed with a group of locking joints, the inner surface wall between every two locking joints is fixedly inserted with horizontal pipeline, multiple horizontal pipelines are equidistantly distributed in the inside of reaction box body, the outer surface wall of each horizontal pipeline is fixedly communicated with a group of liquid distribution pipes, the exhaust end of each liquid distribution pipe is fixedly communicated with hollow joint, mechanism reduces the size of reaction chamber, adopts equidistant arrangement to complete nozzle assembly, ensure that the liquid mist sprayed by each nozzle can form complete liquid curtain, fill every area inside chamber, to avoid part of flue gas escape.

Description

Technical Field

[0001] This invention relates to the field of flue gas denitrification technology, specifically to a low-temperature denitrification device for industrial kiln flue gas. Background Technology

[0002] Industrial kilns are equipment made of refractory materials used to calcine materials or fire products. During use, industrial kilns produce a large amount of flue gas, which contains a large amount of pollutants such as nitrogen oxides and dust, the most common of which are NO, NO2 and other nitrates.

[0003] In the prior art, such as the low-temperature oxidation denitrification equipment for industrial kiln flue gas disclosed in Chinese Patent Publication No. CN211098347U, the flow velocity of flue gas when passing through the working chamber can be reduced, allowing liquid ozone to fully react with the flue gas, effectively reducing cost input; it includes a box body, four sets of support legs and connecting pipes. The box body is provided with a working chamber. The upper half of the left side wall of the box body is provided with an inspection port, and a baffle is detachably installed at the inspection port. The lower half of the left side wall of the box body is connected to an air inlet pipe. The central area of ​​the top of the box body is connected to an air outlet pipe. The bottom end of the connecting pipe is provided with multiple sets of nozzles near the left side. The left half of the bottom of the box body is connected to a drain pipe, and a control valve is installed on the drain pipe.

[0004] However, the aforementioned patents have the following shortcomings:

[0005] If NOx in flue gas is directly released into the atmosphere, it will react with H2O and O2 in the atmosphere to generate nitric acid molecules, causing acid rain in the region. The equipment involved in the aforementioned patent, by improving traditional structural components, can reduce the flow velocity of flue gas in the working chamber, effectively avoiding turbulence in the working chamber. However, some shortcomings still exist, such as:

[0006] 1) The equipment uses a wet denitrification method, which is completed by a set of spray components. Due to the large internal cavity area and wide flue gas diffusion range, some flue gas will escape the scattered denitrification agent, resulting in unsatisfactory flue gas denitrification.

[0007] 2) The optimal operating temperature of conventional denitrification agents is between 50℃ and 150℃, while the flue gas emission temperature is between 200℃ and 400℃. Since this equipment cannot create a standard denitrification environment, it is easy for NH3 in the denitrification agent to be oxidized, increasing the production of NOx.

[0008] Therefore, we propose a low-temperature denitrification device for industrial kiln flue gas to solve the problems mentioned above. Summary of the Invention

[0009] The purpose of this invention is to provide a low-temperature denitrification device for industrial kiln flue gas. Through a liquid curtain integration mechanism connected to the assembly shell, the cooled flue gas is accelerated into the low-pressure manifold for diffusion and distribution, avoiding narrow flue gas transport channels that could cause molecular accumulation. Multiple flue gas diversion pipes act as diversion pipes, ensuring that the flue gas can enter the reaction chamber evenly. Before this, because the specifications and liquid inflow of each horizontal pipe are equal, the liquid mist sprayed by each atomizing nozzle has a consistent range. Utilizing the even distribution of each atomizing nozzle, the final liquid curtain can be dispersed to various areas within the reaction chamber, avoiding the formation of gaps and solving the problems mentioned in the background.

[0010] To achieve the above objectives, the present invention provides the following technical solution: a low-temperature denitrification device for industrial kiln flue gas, comprising an assembly shell, wherein the interior of the assembly shell is respectively provided with a liquid curtain integration mechanism and a secondary cooling mechanism;

[0011] The liquid curtain integration mechanism includes a reaction chamber. Two built-in support plates are fixedly installed between the top and bottom of the inner wall of the reaction chamber. A set of locking connectors is fixedly installed on the outer wall of each built-in support plate. A horizontal pipe is fixedly inserted between the inner walls of every two locking connectors. Multiple horizontal pipes are equidistantly distributed inside the reaction chamber. A group of liquid distribution pipes is fixedly connected to the outer wall of each horizontal pipe. A hollow connector is fixedly connected to the exhaust end of each liquid distribution pipe. A set of atomizing nozzles is fixedly connected inside each hollow connector. A set of flue gas diversion pipes is fixedly connected to the top of the reaction chamber. A manifold is fixedly connected between the inlet ends of the set of flue gas diversion pipes. A set of discharge holes is opened at the bottom of the reaction chamber. A discharge funnel is fixedly connected to the discharge end of each discharge hole.

[0012] Preferably, a reinforcing plate is fixedly installed on one side of the outer wall of the assembly shell, and two external plates are welded to the outer wall of the reinforcing plate. A set of lifting bases is fixedly installed on the top of one of the external plates, and a liquid storage tank is fixedly installed between the tops of the set of lifting bases. A T-shaped pipe is fixedly connected to the bottom of the liquid storage tank.

[0013] Preferably, a set of first hollow sleeves is fixedly installed inside one of the outer plates, and the number of the first hollow sleeves is equal to that of the horizontal pipes. A first air pump is fixedly inserted inside each of the first hollow sleeves. The input end of each first air pump is fixedly connected to a primary liquid flow pipe. The inlet end of each primary liquid flow pipe penetrates the outer wall of the T-shaped pipe and is connected to the inside of the T-shaped pipe. The output end of each first air pump is fixedly connected to a secondary liquid flow pipe. The outlet end of each secondary liquid flow pipe penetrates the outer wall of a corresponding horizontal pipe and is connected to the inside of the horizontal pipe.

[0014] Preferably, the secondary cooling mechanism includes an inner support plate, which is fixedly installed inside the assembly housing. An air inlet box is fixedly installed on the top of the inner support plate, and an air inlet connector is fixedly connected to the top of the air inlet box. A second electromagnetic valve is provided inside the air inlet connector.

[0015] Preferably, a first rectangular frame is fixedly installed at the bottom of the inner support plate. Inner connecting plates are welded to both sides of the inner wall of the first rectangular frame. A second hollow sleeve is fixedly installed inside each inner connecting plate. A drive motor is fixedly inserted into the inner surface wall of each second hollow sleeve. A transmission rod is fixedly connected to the output end of each drive motor. A fan blade is fixedly sleeved on the outer surface wall of each transmission rod. A limit sleeve is fixedly installed at the bottom of each drive motor. The outer surface wall of each transmission rod is movably placed inside a corresponding limit sleeve.

[0016] Preferably, two extension brackets are welded to the bottom of the first rectangular frame, and a second rectangular frame is fixedly installed between the bottoms of the two extension brackets. A compression ventilation assembly is fixedly installed between the opposite sides of the two extension brackets. A refrigeration pipe is fixedly installed at the bottom of the compression ventilation assembly. The input end of the refrigeration pipe is connected to the output end of the compression ventilation assembly, and the refrigeration pipe is located inside the second rectangular frame. The wiring end of the refrigeration pipe is connected to the internal wiring of the equipment.

[0017] Preferably, a third rectangular frame is fixedly installed inside the assembly shell, and a set of positioning bases is fixedly installed on both sides of the inner wall of the third rectangular frame. A path pipe is fixedly installed between the opposite sides of the two sets of positioning bases, and the air inlet end of the path pipe is connected to one side of the outer wall of the air inlet box.

[0018] Preferably, a fourth rectangular frame is fixedly installed inside the assembly housing. Locking blocks are fixedly installed on both sides of the inner wall of the fourth rectangular frame. A junction box is fixedly installed between the opposite sides of the two locking blocks. The exhaust end of the path pipe passes through the top of the junction box and is connected to the interior of the junction box. A temperature sensor is fixedly installed at the bottom of the junction box. The sensing end of the temperature sensor is located inside the junction box. A discharge pipe is fixedly connected to the bottom of the junction box. The exhaust end of the discharge pipe is connected to the top of the manifold. A first electromagnetic valve is provided inside the discharge pipe.

[0019] Preferably, a grafting plate is fixedly installed at the bottom of the junction box, and a third hollow sleeve is fixedly installed inside the grafting plate. A second air pump is fixedly inserted into the inner wall of the third hollow sleeve. The output end of the second air pump is fixedly connected to a first return pipe. The air inlet end of the first return pipe passes through the bottom of the junction box and is connected to the interior of the junction box. The output end of the second air pump is fixedly connected to a second return pipe. The exhaust end of the second return pipe passes through the outer wall of the first rectangular frame and is connected to the interior of the first rectangular frame.

[0020] Preferably, the reaction chamber is fixedly installed inside the assembly shell, and a metal plate is fixedly installed on the outer wall of the assembly shell, with a load-bearing bracket welded to the bottom of the metal plate.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. This invention incorporates a liquid curtain integration mechanism. The gas delivery method is top-down, utilizing the high and low pressure difference generated by the upper chamber. The cooled flue gas is accelerated into the low-pressure manifold for diffusion and distribution, preventing narrow flue gas delivery channels that could cause molecule accumulation. Multiple flue gas diversion pipes act as diverters, ensuring uniform entry of flue gas into the reaction chamber. Prior to this, the equal specifications and liquid volume of each horizontal pipe ensure consistent spray range from each atomizing nozzle. Utilizing the even distribution of each atomizing nozzle, the resulting liquid curtain is dispersed throughout the reaction chamber, preventing gaps. Flue gas entering the reaction chamber must pass completely through the liquid curtain. The mechanism reduces the size of the reaction chamber and uses equidistant nozzle assembly to ensure each nozzle sprays a complete liquid curtain, filling every area within the chamber and preventing some flue gas from escaping.

[0023] 2. This invention employs a two-stage cooling mechanism that allows for two rounds of flue gas collection. After the cooled flue gas enters the manifold, the connected manifold monitors the flue gas stability in real time and provides rapid data feedback to provide theoretical support for the equipment system. If the flue gas temperature does not meet the standard, the equipment system sequentially controls relevant components to prevent the flue gas from continuing to be transported to the next stage, slow down the amount of flue gas entering from the previous stage, and continuously transport the non-compliant flue gas back to the initial chamber for secondary cooling. This method effectively creates optimal operating conditions for the denitrification agent, avoids excessively high or low flue gas temperatures, and effectively reduces the occurrence of denitrification agent deactivation or oxidation problems. Attached Figure Description

[0024] Figure 1 This is a perspective view of the main structure of a low-temperature denitrification device for industrial kiln flue gas according to the present invention;

[0025] Figure 2This is a side view perspective of the low-temperature denitrification device for industrial kiln flue gas according to the present invention;

[0026] Figure 3 This is a perspective view of the bottom side structure of a low-temperature denitrification device for industrial kiln flue gas according to the present invention;

[0027] Figure 4 This is an enlarged perspective view of the liquid curtain integration mechanism in a low-temperature denitrification device for industrial kiln flue gas according to the present invention.

[0028] Figure 5 This invention provides a low-temperature denitrification device for industrial kiln flue gas. Figure 4 Enlarged 3D view of the structure at point A in the middle;

[0029] Figure 6 This is an enlarged perspective view of the secondary cooling mechanism in a low-temperature denitrification device for industrial kiln flue gas according to the present invention.

[0030] Figure 7 This invention provides a low-temperature denitrification device for industrial kiln flue gas. Figure 6 Enlarged 3D view of the structure at point A in the middle.

[0031] Figure 8 This is an enlarged perspective view of a portion of the structure of a low-temperature denitrification device for industrial kiln flue gas according to the present invention.

[0032] In the diagram: 1. Assembly shell; 2. Liquid curtain integration mechanism; 201. Reaction chamber; 202. Internal support plate; 203. Locking connector; 204. Horizontal pipe; 205. Liquid distribution pipe; 206. Hollow connector; 207. Atomizing nozzle; 208. Flue gas diversion pipe; 209. Manifold; 210. Discharge hole; 211. Discharge funnel; 212. Reinforcing plate; 213. External plate; 214. Lifting base; 215. Liquid storage tank; 216. First hollow sleeve; 217. Primary liquid flow pipe; 218. Secondary liquid flow pipe; 219. T-shaped pipe; 220. First air pump; 3. Secondary cooling mechanism; 301. Inner support plate; 302. Air inlet box; 303. First rectangular frame; 304. Inner plate; 305. Second hollow sleeve; 306. Drive motor; 307. Limiting sleeve; 308. Transmission rod; 309. Fan blade; 310. Extension frame; 311. Second rectangular frame; 312. Compression and ventilation assembly; 313. Refrigeration pipe; 314. Third rectangular frame; 315. Positioning base; 316. Path pipe; 317. Fourth rectangular frame; 318. Locking block; 319. Junction box; 320. Temperature sensor; 321. Grafting plate; 322. Third hollow sleeve; 323. Second air pump; 324. First return pipe; 325. Second return pipe; 326. Discharge pipe; 327. First solenoid valve; 4. Metal plate; 5. Load-bearing bracket; 6. Air inlet connector; 7. Second solenoid valve. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Please see the appendix Figure 1 -Appendix Figure 8 As shown, the present invention provides a technical solution: a low-temperature denitrification device for industrial kiln flue gas, including an assembly shell 1, wherein the assembly shell 1 is provided with a liquid curtain integration mechanism 2 and a secondary cooling mechanism 3.

[0035] according to Figure 1 , Figure 3 , Figure 4 and Figure 5 As shown, the liquid curtain integration mechanism 2 includes a reaction chamber 201. Two built-in support plates 202 are fixedly installed between the top and bottom of the inner wall of the reaction chamber 201. A set of locking connectors 203 is fixedly installed on the outer wall of each built-in support plate 202. A horizontal pipe 204 is fixedly inserted between the inner walls of every two locking connectors 203. Multiple horizontal pipes 204 are equidistantly distributed inside the reaction chamber 201. The outer wall of each horizontal pipe 204 is fixedly connected to a component liquid pipe. 205, each liquid separation pipe 205 has a hollow joint 206 fixedly connected to its exhaust end, and a set of atomizing nozzles 207 fixedly connected inside each hollow joint 206. A set of flue gas diversion pipes 208 is fixedly connected to the top of the reaction chamber 201, and a manifold 209 is fixedly connected between the air inlet ends of the set of flue gas diversion pipes 208. A set of discharge holes 210 is opened at the bottom of the reaction chamber 201, and a discharge funnel 211 is fixedly connected to the discharge end of each discharge hole 210.

[0036] according to Figure 4 As shown, a reinforcing plate 212 is fixedly installed on one side of the outer wall of the housing 1. Two external plates 213 are welded to the outer wall of the reinforcing plate 212. A set of lifting bases 214 are fixedly installed on the top of one external plate 213. A liquid storage tank 215 is fixedly installed between the tops of the set of lifting bases 214. A T-shaped pipe 219 is fixedly connected to the bottom of the liquid storage tank 215. By pre-setting the above components, the denitrification agent stored in the liquid storage tank 215 can fall vertically into the T-shaped pipe 219 to replenish the denitrification agent consumed inside.

[0037] according to Figure 4As shown, a set of first hollow sleeves 216 are fixedly installed inside an external plate 213, and the number of the first hollow sleeves 216 is equal to that of the horizontal pipe 204. A first air pump 220 is fixedly inserted inside each first hollow sleeve 216. The input end of each first air pump 220 is fixedly connected to a primary liquid flow pipe 217. The liquid inlet end of each primary liquid flow pipe 217 penetrates the outer wall of the T-shaped pipe 219 and is connected to the inside of the T-shaped pipe 219. The output end of each first air pump 220 is fixedly connected to a secondary liquid flow pipe 218. The discharge end of each secondary liquid flow pipe 218 is respectively connected to... The components are connected to the outer wall of a corresponding horizontal pipe 204 and to the interior of the horizontal pipe 204. By pre-setting the above components, since the output power of each first air pump 220 is equal, the rate at which the denitrification agent is drawn is almost the same. When the denitrification agent in each horizontal pipe 204 is full, some liquid will be squeezed out and released by each atomizing nozzle 207. The purpose of constructing a consistent liquid inlet rate in each horizontal pipe 204 is to ensure that the liquid mist sprayed by each atomizing nozzle 207 has an equal diffusion range, ensuring that the formed liquid curtain barrier can fully diffuse to all areas inside the reaction chamber 201 and prevent some flue gas from escaping.

[0038] according to Figure 1 , Figure 6 and Figure 8 As shown, the secondary cooling mechanism 3 includes an inner support plate 301, which is fixedly installed inside the assembly housing 1. An air inlet box 302 is fixedly installed on the top of the inner support plate 301. An air inlet connector 6 is fixedly connected to the top of the air inlet box 302. A second electromagnetic valve 7 is provided inside the air inlet connector 6. By presetting the above components, the second electromagnetic valve 7 can control the expansion range of the internal channel of the air inlet connector 6, thereby indirectly controlling the amount of flue gas entering the stage of the air inlet box 302.

[0039] according to Figure 6 and Figure 7As shown, a first rectangular frame 303 is fixedly installed at the bottom of the inner support plate 301. Inner connecting plates 304 are welded to both sides of the inner wall of the first rectangular frame 303. A second hollow sleeve 305 is fixedly installed inside each inner connecting plate 304. A drive motor 306 is fixedly inserted into the inner surface of each second hollow sleeve 305. A transmission rod 308 is fixedly connected to the output end of each drive motor 306. A fan blade 309 is fixedly sleeved on the outer surface of each transmission rod 308. A limiting sleeve 307 is fixedly installed at the bottom of each drive motor 306. The outer surface of each transmission rod 308 is movably placed inside a corresponding limiting sleeve 307. By pre-setting the above components, the drive component can drive the fan blade 309 to rotate at high speed. The resulting high-speed airflow directly acts on the refrigeration pipe 313, accelerating the diffusion speed of cold air, accelerating the cooling of the refrigeration pipe 313 material, increasing the amount of cold air penetrating into the refrigeration pipe 313, and continuously cooling the flue gas flowing in the refrigeration pipe 313.

[0040] according to Figure 6 As shown, two extension brackets 310 are welded to the bottom of the first rectangular frame 303. A second rectangular frame 311 is fixedly installed between the bottoms of the two extension brackets 310. A compression ventilation assembly 312 is fixedly installed between the opposite sides of the two extension brackets 310. A refrigeration pipe 313 is fixedly installed at the bottom of the compression ventilation assembly 312. The input end of the refrigeration pipe 313 is connected to the output end of the compression ventilation assembly 312, and the refrigeration pipe 313 is located inside the second rectangular frame 311. The wiring terminal of the refrigeration pipe 313 is connected to the internal wiring of the equipment. By presetting the above components, the output power of the compression ventilation assembly 312 is determined by the real-time situation. If the flue gas temperature entering the manifold 319 is too high during a certain period, the equipment system will reasonably control the cooling capacity of the compression ventilation assembly 312, and the temperature of the cold air produced on the surface of the refrigeration pipe 313 will also decrease accordingly. Conversely, the cooling capacity will be reduced to effectively control the flue gas temperature within the standard range and avoid excessively high or low temperatures.

[0041] according to Figure 6 and Figure 8 As shown, a third rectangular frame 314 is fixedly installed inside the housing 1. A set of positioning bases 315 are fixedly installed on both sides of the inner wall of the third rectangular frame 314. A path pipe 316 is fixedly installed between the opposite sides of the two sets of positioning bases 315. The air inlet end of the path pipe 316 is connected to one side of the outer wall of the air inlet box 302. By pre-setting the above components, the mechanism fully separates the cooling component from the flue gas pipe, so as to avoid the flue gas overflow temperature from interfering with the cooling component and improving the continuity of cold air generation. At the same time, the path pipe 316 is a bent pipe with a longer movement path, which aims to increase the flue gas cooling time.

[0042] according to Figure 8As shown, a fourth rectangular frame 317 is fixedly installed inside the housing 1. Locking blocks 318 are fixedly installed on both sides of the inner wall of the fourth rectangular frame 317. A manifold 319 is fixedly installed between the opposite sides of the two locking blocks 318. The exhaust end of the path pipe 316 passes through the top of the manifold 319 and is connected to the interior of the manifold 319. A temperature sensor 320 is fixedly installed at the bottom of the manifold 319, with its sensing end located inside the manifold 319. A discharge pipe 326 is fixedly connected to the bottom of the manifold 319. The exhaust end of the discharge pipe 326 is connected to the top of the manifold hood 209. The interior of the discharge pipe 326... The unit is equipped with a first solenoid valve 327. Through the preset components, the cooled flue gas will continuously flow into the junction box 319. At this time, the temperature sensor 320 monitors the flue gas temperature in real time, and the obtained data will be fed back to the equipment system in real time. If the value range is within the range, it will be discharged to the next level through the discharge pipe 326. If the value range is not within the range, the first solenoid valve 327, the second solenoid valve 7, and the second air pump 323 will be controlled in sequence to close the internal channel of the discharge pipe 326, reduce the size of the internal channel of the air inlet connector 6, and slow down the amount of flue gas entering. The second air pump 323 can transport the flue gas in the junction box 319 back to the air inlet box 302 through the connected pipe for secondary cooling.

[0043] according to Figure 8 As shown, a grafting plate 321 is fixedly installed at the bottom of the junction box 319. A third hollow sleeve 322 is fixedly installed inside the grafting plate 321. A second air pump 323 is fixedly inserted into the inner wall of the third hollow sleeve 322. The output end of the second air pump 323 is fixedly connected to a first return pipe 324. The air inlet end of the first return pipe 324 passes through the bottom of the junction box 319 and is connected to the interior of the junction box 319. The output end of the second air pump 323 is fixedly connected to a second return pipe 325. The exhaust end of the second return pipe 325 passes through the outer wall of the first rectangular frame 303 and is connected to the interior of the first rectangular frame 303. By pre-setting the above components, the flue gas in the junction box 319 is extracted and circulated for a second time until the flue gas temperature is reduced to the standard range.

[0044] according to Figure 1 , Figure 2 and Figure 3 As shown, the reaction chamber 201 is fixedly installed inside the assembly shell 1, and a metal plate 4 is fixedly installed on the outer wall of the assembly shell 1. A load-bearing bracket 5 is welded to the bottom of the metal plate 4.

[0045] The overall effect of the mechanism is as follows: during the equipment preparation stage, the equipment is moved to the designated work area and the bottom of the load-bearing bracket 5 is fully in contact with the ground. Then, the external line is connected to the power supply of the equipment to provide energy for the multiple electrical components inside. Furthermore, the equipment is connected to the kiln exhaust pipe through the flange plate on the air inlet connector 6.

[0046] During the flue gas cooling stage, when the kiln is in use, the flue gas generated can continuously enter the inlet box 302 from the inlet joint 6. As the cubic volume of the flue gas inside the inlet box 302 increases, the gas pressure intensity also increases. Utilizing the interaction force generated by the collision of molecules in the flue gas, some of the flue gas will be pushed into the path pipe 316. Before this, the drive motor 306 and the compression and ventilation assembly 312 are turned on. The former can directly act on the transmission rod 308, driving the fan blade 309 to rotate at high speed and generate a downward high-speed airflow. The cold air generated by the latter can continuously circulate in the cooling pipe 313 and continuously diffuse to the outside. The high-speed airflow generated by the fan blade 309 will blow the cold air onto the surface of the path pipe 316, accelerating the cooling of the material of the path pipe 316. The cold air that seeps into it cools the circulating flue gas. The continuously processed flue gas can enter the junction box 319 from the exhaust end of the path pipe 316.

[0047] During the flue gas denitrification stage, based on the above principle, as the volume of flue gas entering the manifold 319 increases, its internal pressure also gradually increases. When the discharge pipe 326 is open, the flue gas in the manifold 319 continuously enters the manifold 209 through the discharge pipe 326 and diffuses rapidly. After being diverted by each flue gas diversion pipe 208, the density of flue gas molecules can be dispersed. Before this, each of the first air pumps 220 is turned on. Since the output power of each first air pump 220 is equal, the rate at which the denitrification agent is drawn from the T-shaped pipe 219 is consistent. Then, through the transport of the primary liquid flow pipe 217 and the secondary liquid flow pipe 218, the denitrification agent is sequentially transferred to each horizontal pipe 204. When the liquid in each horizontal pipe 204 is full, the denitrification agent is partially transferred to the manifold 204. The denitrification agent is squeezed out and transported by each liquid distribution pipe 205 to a corresponding hollow joint 206. Finally, after being compressed by each atomizing nozzle 207, the denitrification agent is sprayed in the form of atomization into the reaction chamber 201. Because a group of horizontal pipes 204 are evenly distributed and the number and position of the atomizing nozzles 207 in each horizontal pipe 204 are consistent, the emitted liquid mist can be dispersed to any position inside the reaction chamber 201. The flue gas entering the reaction chamber 201 can only pass through the formed liquid curtain longitudinally and continue to carry out the reduction reaction. The dust in the flue gas will be adsorbed by the water molecules generated by the reaction and fall into the discharge funnel 211 under the action of gravity. Finally, the mixture and gas are discharged from the end of the discharge funnel 211.

[0048] During the secondary cooling stage of the flue gas, as the cooled flue gas continuously flows into the manifold 319, the temperature sensor 320 monitors the flue gas temperature in real time, and the measured data is fed back to the equipment system in real time. If the value exceeds the standard value, the equipment system sequentially controls the opening of the second air pump 323, the first solenoid valve 327, and the second solenoid valve 7 to achieve the purpose of closing the internal channel of the discharge pipe 326, extracting the flue gas in the manifold 319, and narrowing the internal channel of the inlet connector 6. Closing the internal channel of the discharge pipe 326 can prevent the flue gas in the manifold 319 from being transported to the next stage, and narrowing the internal channel of the inlet connector 6 can reduce the initial amount of flue gas entering. After the second air pump 323 is turned on, the flue gas is transported back to the inlet box 302 by the first return pipe 324 and the second return pipe 325. The secondary cooling is completed through the above steps. After the conditions are met, the equipment system will restore each component and increase the original output power of the compression and ventilation assembly 312 to increase the cooling capacity, so that the temperature of the cold air entering the cooling pipe 313 is further reduced.

[0049] Although the present invention 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 invention should be included within the protection scope of the present invention.

Claims

1. A low-temperature denitrification device for industrial kiln flue gas, characterized in that: It includes an assembly shell (1), and the interior of the assembly shell (1) is respectively provided with a liquid curtain integration mechanism (2) and a secondary cooling mechanism (3); The liquid curtain integration mechanism (2) includes a reaction chamber (201). Two built-in support plates (202) are fixedly installed between the top and bottom of the inner wall of the reaction chamber (201). A set of locking connectors (203) is fixedly installed on the outer wall of each built-in support plate (202). A horizontal pipe (204) is fixedly inserted between the inner walls of every two locking connectors (203). Multiple horizontal pipes (204) are equidistantly distributed inside the reaction chamber (201). The outer wall of each horizontal pipe (204) is fixedly connected to a component liquid pipe (205). Each of the liquid distribution pipes (205) has a hollow connector (206) fixedly connected to its exhaust end. Each of the hollow connectors (206) has a set of atomizing nozzles (207) fixedly connected inside. The top of the reaction chamber (201) has a set of flue gas diversion pipes (208) fixedly connected. The inlet ends of the set of flue gas diversion pipes (208) are fixedly connected to a manifold (209). The bottom of the reaction chamber (201) has a set of discharge holes (210). The discharge end of each discharge hole (210) is fixedly connected to a discharge funnel (211).

2. The low-temperature denitrification device for industrial kiln flue gas according to claim 1, characterized in that: A reinforcing plate (212) is fixedly installed on one side of the outer wall of the assembly shell (1). Two external plates (213) are welded to the outer wall of the reinforcing plate (212). A set of lifting bases (214) is fixedly installed on the top of one of the external plates (213). A liquid storage tank (215) is fixedly installed between the tops of the set of lifting bases (214). A T-shaped pipe (219) is fixedly connected to the bottom of the liquid storage tank (215).

3. The low-temperature denitrification device for industrial kiln flue gas according to claim 2, characterized in that: An external plate (213) has a set of first hollow sleeves (216) fixedly installed inside, and the number of the set of first hollow sleeves (216) is equal to that of the horizontal pipe (204). A first air pump (220) is fixedly inserted inside each of the first hollow sleeves (216). The input end of each first air pump (220) is fixedly connected to a primary liquid flow pipe (217). The liquid inlet end of each primary liquid flow pipe (217) penetrates the outer wall of the T-shaped pipe (219) and is connected to the inside of the T-shaped pipe (219). The output end of each first air pump (220) is fixedly connected to a secondary liquid flow pipe (218). The liquid outlet end of each secondary liquid flow pipe (218) penetrates the outer wall of a corresponding horizontal pipe (204) and is connected to the inside of the horizontal pipe (204).

4. The low-temperature denitrification device for industrial kiln flue gas according to claim 1, characterized in that: The secondary cooling mechanism (3) includes an inner support plate (301), which is fixedly installed inside the assembly shell (1). An air inlet box (302) is fixedly installed on the top of the inner support plate (301), and an air inlet connector (6) is fixedly connected to the top of the air inlet box (302). A second electromagnetic valve (7) is provided inside the air inlet connector (6).

5. The low-temperature denitrification device for industrial kiln flue gas according to claim 4, characterized in that: The bottom of the inner support plate (301) is fixedly installed with a first rectangular frame (303). The inner walls of the first rectangular frame (303) are welded with inner connecting plates (304) on both sides. The interior of each inner connecting plate (304) is fixedly installed with a second hollow sleeve (305). The inner surface wall of each second hollow sleeve (305) is fixedly inserted with a drive motor (306). The output end of each drive motor (306) is fixedly connected with a transmission rod (308). The outer surface wall of each transmission rod (308) is fixedly fitted with a fan blade (309). The bottom of each drive motor (306) is fixedly installed with a limiting sleeve (307). The outer surface wall of each transmission rod (308) is movably placed inside a corresponding limiting sleeve (307).

6. The low-temperature denitrification device for industrial kiln flue gas according to claim 5, characterized in that: Two extension brackets (310) are welded to the bottom of the first rectangular frame (303). A second rectangular frame (311) is fixedly installed between the bottoms of the two extension brackets (310). A compression ventilation assembly (312) is fixedly installed between the opposite sides of the two extension brackets (310). A refrigeration pipe (313) is fixedly installed at the bottom of the compression ventilation assembly (312). The input end of the refrigeration pipe (313) is connected to the output end of the compression ventilation assembly (312), and the refrigeration pipe (313) is located inside the second rectangular frame (311). The wiring terminal of the refrigeration pipe (313) is connected to the internal wiring of the equipment.

7. The low-temperature denitrification device for industrial kiln flue gas according to claim 4, characterized in that: The assembly housing (1) is fixedly installed with a third rectangular frame (314). A set of positioning bases (315) is fixedly installed on both sides of the inner wall of the third rectangular frame (314). A path pipe (316) is fixedly installed between the opposite sides of the two sets of positioning bases (315). The air inlet end of the path pipe (316) is connected to one side of the outer wall of the air inlet box (302).

8. The low-temperature denitrification device for industrial kiln flue gas according to claim 7, characterized in that: The assembly housing (1) is fixedly installed with a fourth rectangular frame (317). Locking blocks (318) are fixedly installed on both sides of the inner wall of the fourth rectangular frame (317). A junction box (319) is fixedly installed between the opposite sides of the two locking blocks (318). The exhaust end of the path pipe (316) passes through the top of the junction box (319) and is connected to the interior of the junction box (319). A temperature sensor (320) is fixedly installed at the bottom of the junction box (319). The sensing end of the temperature sensor (320) is located inside the junction box (319). A discharge pipe (326) is fixedly connected to the bottom of the junction box (319). The exhaust end of the discharge pipe (326) is connected to the top of the manifold (209). A first electromagnetic valve (327) is provided inside the discharge pipe (326).

9. The low-temperature denitrification device for industrial kiln flue gas according to claim 8, characterized in that: A grafting plate (321) is fixedly installed at the bottom of the junction box (319). A third hollow sleeve (322) is fixedly installed inside the grafting plate (321). A second air pump (323) is fixedly inserted into the inner wall of the third hollow sleeve (322). The output end of the second air pump (323) is fixedly connected to a first return pipe (324). The air inlet end of the first return pipe (324) penetrates the bottom of the junction box (319) and is connected to the interior of the junction box (319). The output end of the second air pump (323) is fixedly connected to a second return pipe (325). The exhaust end of the second return pipe (325) penetrates the outer wall of the first rectangular frame (303) and is connected to the interior of the first rectangular frame (303).

10. The low-temperature denitrification device for industrial kiln flue gas according to claim 1, characterized in that: The reaction chamber (201) is fixedly installed inside the assembly shell (1), and a metal plate (4) is fixedly installed on the outer wall of the assembly shell (1). A load-bearing bracket (5) is welded to the bottom of the metal plate (4).

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