SCR denitration efficiency optimization device and method based on multivariate data fusion

Abstract

The application provides a kind of SCR denitration efficiency optimization device and method based on multivariate data fusion, including main casing and the catalytic reaction module and tail gas treatment module being arranged in it.Catalytic reaction module is reduced to speed and depth dedusting to flue gas by inlet air buffer tank, multistage filtering speed reduction mechanism;Real-time monitoring is carried out using temperature and gas detector, and reaction temperature and ammonia gas mixing are accurately controlled by air heater and ammonia gas supply heating system;Reciprocating closed frame driven by vibrating screen motor, which is internally equipped with multiple layers of honeycomb catalytic block to realize vibration dust removal and online replacement.Tail gas treatment module then cools and by-product separates the gas after reaction by external exhaust cold filter tank, removes ammonium bisulfate condensate using slag removal mechanism, and realizes tail gas composition detection and recirculation through gas analyzer and circulating backflow pipe.The application effectively solves the problems of catalyst blockage, unstable temperature control and inconvenient maintenance through multivariate data fusion closed-loop control.

Description

Technical Field

[0001] This invention relates to the field of industrial flue gas purification technology, and in particular to a device and method for optimizing SCR denitrification efficiency based on multivariate data fusion. Background Technology

[0002] SCR (Selective Catalytic Reduction) denitrification technology is one of the most widely used flue gas denitrification technologies. Its principle involves injecting a reducing agent (such as ammonia) into the flue gas under the action of a catalyst, selectively reducing nitrogen oxides (NOx) into harmless nitrogen and water. However, existing SCR denitrification units face numerous challenges in actual operation. First, industrial flue gas typically contains a large amount of dust and particulate matter. Existing technologies often fail to effectively pretreat the flue gas, causing this dust to easily coat the catalyst surface as it passes through the catalyst bed, clogging the catalyst pores. This significantly reduces the effective contact area for the catalytic reaction, lowers denitrification efficiency, and increases system pressure drop.

[0003] Secondly, the efficiency of the catalytic reaction is closely related to the reaction temperature. Existing technologies often lack precise and stable control over the reaction temperature. Excessively high temperatures can cause the injected ammonia to decompose, reducing reduction efficiency and potentially leading to ammonia escape; excessively low temperatures can cause some reactants (such as ammonium bisulfate) to condense and adhere to the catalyst surface, exacerbating blockage and catalyst poisoning, thus affecting the catalytic effect and the long-term stable operation of the device. For example, Chinese patent application CN202421459879.1 discloses a "Denitrification SCR Ammonia Injection Optimization Device," which focuses on solving the problem of uneven distribution of flue gas across the catalyst cross-section, but does not address key issues such as deep filtration of flue gas particles, online cleaning and replacement of the catalyst, and precise multi-stage control of the reaction temperature. Therefore, there is an urgent need in this field for an SCR denitrification efficiency optimization device that can comprehensively solve problems such as flue gas blockage, unstable temperature control, and difficult catalyst maintenance. Summary of the Invention

[0004] The purpose of this invention is to provide an SCR denitrification efficiency optimization device and method based on multivariate data fusion. Through integrated structural design, the device can perform multi-stage dust removal, precise temperature control, uniform mixing, online ash removal, and convenient catalyst replacement of flue gas, thereby comprehensively improving the denitrification efficiency, operational stability, and maintenance convenience of the SCR system.

[0005] According to one objective of the present invention, the present invention provides an SCR denitrification efficiency optimization device based on multivariate data fusion, comprising a main shell, wherein a catalytic reaction module and an exhaust gas treatment module are disposed within the main shell;

[0006] The catalytic reaction module includes:

[0007] An air intake buffer box is located at the bottom of the main housing. The air intake buffer box is equipped with a porous guide bucket to slow down the air intake airflow and initially settle impurities.

[0008] The multi-stage filtration and deceleration mechanism is located above the air intake buffer box inside the main housing. It includes a perforated limiting plate, a blocking and deceleration perforated bucket, and a blocking mesh cylinder, which are used to decelerate the flue gas in multiple stages and remove dust deeply.

[0009] Temperature detectors and gas detectors are installed inside the main housing to monitor flue gas temperature and gas composition;

[0010] An air heater, disposed within the main housing, is used to heat the flue gas;

[0011] The ammonia supply and heating system includes an inlet heat conduction pipe, an annular heating pipe and an upper spray I-Card pipe connected in sequence. The inlet heat conduction pipe is thermally coupled to the exhaust gas treatment module to absorb waste heat. The annular heating pipe is equipped with an electric heating fixing box for auxiliary heating, which is used to evaporate and heat the liquid ammonia and then spray it into the main shell to mix with the flue gas.

[0012] The reciprocating closing frame is connected to the main housing via a spring linkage rod and is driven by a vibrating screen motor to generate vibration. It contains multiple layers of honeycomb catalyst blocks that can be detachably installed inside.

[0013] A recirculation return pipe connects the exhaust gas treatment module and the intake buffer box, and is equipped with a return fan;

[0014] The exhaust gas treatment module includes:

[0015] An external exhaust cold filter box is connected to the top of the main housing. The external exhaust cold filter box is equipped with a flow deceleration frame and a cooling mesh plate to reduce the exhaust gas velocity and temperature.

[0016] The slag removal mechanism includes a slag removal scraper driven by a slag removal motor, used to remove byproducts condensed on the deceleration frame;

[0017] A gas analyzer is installed inside the external exhaust cold filter box to detect the composition of the treated exhaust gas.

[0018] Furthermore, the reciprocating closing frame is connected to a lower pressure upper support plate via a spring hinge on its inner side, and the honeycomb catalyst block is placed in a frame composed of an upper convex and lower clamping structure and supported on the lower pressure upper support plate.

[0019] Furthermore, the side of the main housing is provided with a sealed isolation plate driven by a sealed electric slide rail. Inside the sealed isolation plate is an upward push electric push rod. The top of the upward push electric push rod is provided with an upward feeding rack. Both the upward feeding rack and the downward pressing support plate are provided with a feed electromagnet for adsorbing and fixing the upper convex lower bracket.

[0020] Furthermore, the main housing and the reciprocating closing frame are provided with an external discharge operation port, and the external discharge operation port is provided with a closing arc limiting plate driven by the closing electric slide rail, which is used to seal or open the external discharge operation port.

[0021] Furthermore, one end of the air intake buffer box is hinged with a sealing cover plate, and an internal cleaning treatment plate driven by an internal cleaning electric slide rail is provided inside.

[0022] Furthermore, the exhaust gas treatment module also includes a vacuum cleaner, which is connected to the vacuum cleaning box on the side of the main housing and the external exhaust cold filter box via a vacuuming operation pipe.

[0023] Furthermore, the intake heat pipe is coiled inside a protective isolation sleeve, which is attached to the outer wall of the exhaust cold filter box to achieve heat exchange.

[0024] Furthermore, the temperature detector, the gas detector, the gas analyzer, the vibrating screen motor, the air heater, the electric heating fixing box, the return flow fan, the slag cleaning motor, the upward push electric actuator, and the advance and stop electromagnet are all electrically connected to an external controller, forming a closed-loop control system based on multivariate data feedback.

[0025] Furthermore, the porous guide bucket, the porous limiting plate, the blocking and decelerating porous bucket, the blocking mesh cylinder, and the flow limiting mesh plate are arranged alternately in the main shell along the airflow direction. By changing the cross-sectional area and direction of the airflow channel, turbulence and counterflow are formed to promote dust settling.

[0026] According to another objective of the present invention, the present invention provides a method for using the above-mentioned SCR denitrification efficiency optimization device based on multivariate data fusion, comprising the following steps:

[0027] The flue gas is slowed down and deeply dusted through a multi-stage filtration and deceleration mechanism;

[0028] The flue gas temperature is monitored using a temperature detector, and the flue gas is heated to a preset reaction temperature using an air heater;

[0029] Using an ammonia supply and heating system, liquid ammonia is evaporated and heated by absorbing waste heat from the tail gas and electric auxiliary heating, and then mixed with the pretreated flue gas.

[0030] The mixed gas undergoes a catalytic reduction reaction by passing through a multi-layered honeycomb catalytic block within a vibrating reciprocating closed frame.

[0031] The composition of gases during the reaction process is monitored in real time using a gas detector, and the circulation volume of unreacted gases is adjusted by using a circulation reflux pipe and a reflux fan.

[0032] The exhaust gas after the reaction is cooled in an external cold filter box, which condenses the ammonium bisulfate and removes it through a slag removal mechanism.

[0033] The final exhaust gas is tested using a gas analyzer, and emissions are only allowed after it meets the standards.

[0034] This invention significantly improves the overall performance of the SCR denitrification system through integrated structural design and intelligent control. By employing multi-stage deceleration, counter-current, and mesh interception technologies, it deeply removes dust from flue gas, and combined with vibration cleaning, effectively prevents catalyst blockage, ensuring long-term stability of the catalytic reaction area and efficiency. Utilizing a multi-stage temperature detection and heating system, it ensures the reaction temperature remains within the optimal range. Simultaneously, through gas detection and data fusion, it achieves closed-loop optimized control of ammonia injection and tail gas recirculation, significantly improving denitrification efficiency and reducing ammonia escape. The integrated automatic slag removal, centralized dust collection, and rapid material replacement mechanisms enable non-stop online maintenance and catalyst replacement without disassembly, greatly reducing maintenance intensity and costs, and ensuring continuous and reliable system operation. Attached Figure Description

[0035] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0036] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of the present invention;

[0037] Figure 2 This is a schematic diagram of the structure of the multi-catalyst component according to an embodiment of the present invention;

[0038] Figure 3 This is a schematic diagram of the installation structure of the honeycomb catalyst block according to an embodiment of the present invention;

[0039] Figure 4 This is a schematic diagram of the installation structure of the vibrating screen motor according to an embodiment of the present invention;

[0040] Figure 5 This is a schematic diagram of the installation structure of the sealing and isolation ring according to an embodiment of the present invention;

[0041] Figure 6 This is a schematic diagram of the installation structure of the lower support plate according to an embodiment of the present invention;

[0042] Figure 7 This is a schematic diagram of the installation structure of the current-limiting mesh plate according to an embodiment of the present invention;

[0043] Figure 8This is a schematic diagram of the installation structure of the porous guide bucket according to an embodiment of the present invention;

[0044] Figure 9 This is a schematic diagram of the structure of the sorting and separating component according to an embodiment of the present invention;

[0045] Figure 10 This is a schematic diagram of the installation structure of the cooling mesh plate according to an embodiment of the present invention;

[0046] Figure 11 This is a schematic diagram of the installation structure of the slag-cleaning motor according to an embodiment of the present invention;

[0047] In the diagram: 1. Closed-spaced limit frame;

[0048] 2. Multi-stage catalyst assembly; 201. Spring linkage rod; 202. Reciprocating closing frame; 203. Vibrating screen motor; 204. Sealing isolation ring; 205. Lower pressure upper support plate; 206. Upper convex lower clamping bracket; 207. Honeycomb catalyst block; 208. External discharge operation port; 209. Closed-lock electric slide rail; 210. Closed-lock arc limiting plate; 211. Multi-hole limiting plate; 212. Blocking and decelerating multi-hole bucket; 213. Blocking screen cylinder; 214. Flow limiting screen plate; 215. Temperature... 216. Gas detector; 217. Inlet buffer box; 218. Multi-hole guide bucket; 219. Gas injection operation pipe; 220. Circulation return pipe; 221. Return fan; 222. External exhaust cold filter box; 223. Protective isolation sleeve; 224. Inlet heat conduction pipe; 225. Electric heating fixing box; 226. Annular heating pipe; 227. Top spray anti-lock pipe; 228. Slow spray inlet bucket; 229. Air heater; 230. Linkage processing valve;

[0049] 3. Sorting and cleaning components; 301. Dust collection fixing box; 302. Locking fixing ring; 303. Slowing and cooling mesh plate; 304. Flow diversion and deceleration frame; 305. Slag cleaning motor; 306. Slag cleaning scraper; 307. Closing sealing plate; 308. Limiting guide frame; 309. Gas analyzer; 310. External discharge operation pipe; 311. Vacuum cleaner; 312. Dust collection operation pipe; 313. Operation processing valve; 314. Sealing cover plate; 315. Internal cleaning electric slide rail; 316. Internal cleaning processing plate; 317. Upward push electric push rod; 318. Upward push material rack; 319. Infeed and stop electromagnet; 320. Sealed electric slide rail; 321. Sealed isolation plate. Detailed Implementation

[0050] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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.

[0051] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0052] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they may refer to a fixed connection, a detachable connection, or an integral connection; they may refer to a mechanical connection or an electrical connection; they may refer to a direct connection or an indirect connection through an intermediate medium; and they may refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0053] Example 1

[0054] like Figures 1-11 As shown, an SCR denitrification efficiency optimization device based on multivariate data fusion includes a sealed limiting frame 1, and a multi-catalyst component 2 with a dividing block is provided on the side of the sealed limiting frame 1.

[0055] The multi-catalyst component 2 includes a spring linkage rod 201, a reciprocating closing frame 202, a vibrating screen motor 203, a sealing isolation ring 204, a lower pressure upper support plate 205, an upper convex lower clamping bracket 206, a honeycomb catalytic block 207, an external discharge operation port 208, a closing electric slide rail 209, a closing arc limiting plate 210, a multi-hole limiting plate 211, a blocking deceleration multi-hole bucket 212, a blocking net cylinder 213, a flow limiting net plate 214, a temperature detector 215, a gas detector 216, an air inlet buffer box 217, a multi-hole guide bucket 218, an air injection operation pipe 219, a circulating return pipe 220, a return fan 221, an external discharge cold filter box 222, a protective isolation sleeve 223, an air inlet heat conduction pipe 224, an electric heating fixing box 225, an annular heating pipe 226, an upper spray anti-blocking pipe 227, a slow spray air inlet bucket 228, an air heater 229, and a linkage processing valve 230.

[0056] A spring linkage rod 201 is symmetrically installed on the side end of the close-separated fixed-limit frame 1, and a reciprocating closing frame 202 is installed between the bottom ends of the two spring linkage rods 201.

[0057] A vibrating screen motor 203 is mounted on one end of the reciprocating closing frame 202 via a motor mount, and sealing isolation rings 204 are fitted on the top and bottom of the side end of the reciprocating closing frame 202.

[0058] The reciprocating closed frame 202 is equidistantly connected to the lower support plate 205 by spring hinges. The upper support plate 205 has an upper convex lower bracket 206 at the top. There are four upper convex lower brackets 206 to realize multi-stage catalytic treatment. The reciprocating closed frame 202 is placed inside the sealed limit frame 1. The outer end of the sealing isolation ring 204 is attached to the inner end of the sealed limit frame 1. The upper convex lower bracket 206 is placed inside the reciprocating closed frame 202 to realize multi-stage linkage, ensure the stability of the overall series connection and the structural sealing, and avoid the overflow and discharge of exhaust gas and ammonia.

[0059] A honeycomb catalytic block 207 is embedded in the inner side of the upper convex lower clamp 206. The honeycomb catalytic block 207 is placed inside the reciprocating closing frame 202 to achieve stable clamping and catalytic treatment.

[0060] Both the sealed limit frame 1 and the reciprocating closing frame 202 have several external discharge operation ports 208 symmetrically and at equal intervals on their sides, and the external discharge operation ports 208 are symmetrically installed with locking electric slide rails 209 on their sides.

[0061] A locking arc limiting plate 210 is installed at one end of the locking electric slide rail 209 via a slide rail seat. The locking arc limiting plate 210 is slidably installed inside the external discharge operation port 208 to achieve locking treatment of the external discharge operation port 208, ensuring overall sealing and quick opening and closing operation.

[0062] Several perforated limiting plates 211 are installed at equal intervals on the inner side of the closed-cell fixed-limit frame 1, and several blocking and deceleration perforated buckets 212 are welded at equal intervals on the bottom end of the perforated limiting plates 211.

[0063] A blocking mesh cylinder 213 is snapped into the inner side of the blocking and decelerating porous bucket 212;

[0064] A flow-limiting mesh plate 214 is snapped into the middle of the inner side of the airtight frame 1, and a temperature detector 215 is snapped into the bottom end of the flow-limiting mesh plate 214.

[0065] Gas detectors 216 are embedded and installed on the inner side of the air-limiting frame 1 near the flow-limiting mesh plate 214 and at the top of the upper convex lower clip 206.

[0066] The bottom end of the air-intake buffer box 217 is welded to the air-intake buffer box 217, and the top of the inner side of the air-intake buffer box 217 is welded to a perforated guide bucket 218.

[0067] One end of the air intake buffer box 217 is connected to an air injection operation pipe 219, and the other end of the air intake buffer box 217 is connected to several circulating return pipes 220 at equal intervals.

[0068] A return fan 221 is installed at one end of the inner side of the recirculation return pipe 220;

[0069] An external discharge cold filter box 222 is installed at the top of the sealed limit frame 1, and a protective isolation sleeve 223 is installed on the outer end of the external discharge cold filter box 222.

[0070] An air inlet heat conduction pipe 224 is installed inside the protective isolation sleeve 223;

[0071] A heating box 225 is symmetrically installed in the middle of the side of the sealed limiting frame 1. An annular heating tube 226 is sleeved inside the heating box 225. The other ends of multiple circulating return pipes 220 are installed through the sealed limiting frame 1 and the side of the external exhaust cold filter box 222. The side of the inlet heat conduction pipe 224 is attached to the side of the external exhaust cold filter box 222. One end of the inlet heat conduction pipe 224 is connected to one end of the annular heating tube 226 through an adapter to realize the heating treatment of ammonia and increase the temperature of the ammonia gas injected into the reaction.

[0072] The top end of the annular heating tube 226 is connected to the upper spray anti-lock tube 227 via an adapter. The top end of the upper spray anti-lock tube 227 is connected to the slow spray air inlet 228. Both the upper spray anti-lock tube 227 and the slow spray air inlet 228 are placed inside the sealed fixed limit frame 1 to achieve gas injection reaction and positioning exhaust mixing treatment.

[0073] Air heaters 229 are installed inside both the reciprocating closed frame 202 and the close-range fixed limit frame 1;

[0074] One end of the gas injection operation pipe 219, the circulation return pipe 220, the gas inlet heat conduction pipe 224, and the annular heating pipe 226 is embedded with a linkage processing valve 230.

[0075] To ensure stable operation of the equipment, the input terminals of the vibrating screen motor 203, the closed-loop electric slide rail 209, the temperature detector 215, the gas detector 216, the return fan 221, the electric heating box 225, the air heater 229, and the linkage processing valve 230 are all electrically connected to the output terminal of the external controller.

[0076] The signal output terminals of both temperature detector 215 and gas detector 216 are electrically connected to the signal input terminal of an external controller;

[0077] The input terminal of the external controller is electrically connected to the output terminal of the external power supply.

[0078] A barrier separation component 3 is provided on the side end of the close-separated limit frame 1;

[0079] The sorting and separating assembly 3 includes a dust collection fixing box 301, a locking fixing ring 302, a slowing and cooling mesh plate 303, a flow guiding and deceleration frame 304, a slag cleaning motor 305, a slag cleaning scraper 306, a closing sealing plate 307, a limiting guide frame 308, a gas analyzer 309, an external discharge operation pipe 310, a vacuum cleaner 311, a dust collection operation pipe 312, an operation processing valve 313, a sealing cover plate 314, an internal cleaning electric slide rail 315, an internal cleaning processing plate 316, an upward push electric push rod 317, an upward push material rack 318, an infeed electromagnet 319, a sealed electric slide rail 320, and a sealed isolation plate 321.

[0080] A dust collection fixing box 301 is installed at the side end of the close-fitting frame 1, corresponding to the position of the reciprocating closing frame 202 and the perforated limiting plate 211;

[0081] Several locking rings 302 are welded at equal intervals on the inner side of the external discharge cold filter box 222, and a cooling mesh plate 303 is snapped into the inner side of the locking rings 302;

[0082] A flow-guiding speed reducer 304 is welded to the inner side of the external discharge cold filter box 222, and a slag cleaning motor 305 is installed at the top of the flow-guiding speed reducer 304 through a motor base;

[0083] The output shaft of the slag cleaning motor 305 is clamped to the slag cleaning scraper 306, which is rotatably installed inside the diversion speed reducer 304 to achieve steady slag cleaning.

[0084] A closed sealing plate 307 is welded to the top of the side end of the flow deceleration frame 304. One end of the closed sealing plate 307 is welded to the inner side of the external discharge cold filter box 222. The longitudinal section of the limiting flow guide frame 308 is trapezoidal, which realizes the deceleration, cooling and slag removal treatment of air intake and airflow.

[0085] A limiting guide frame 308 is welded to the top of the inner side of the external discharge cold filter box 222, and a gas analyzer 309 is installed at the bottom of the limiting guide frame 308.

[0086] An external discharge operation pipe 310 is connected through the top center of the external discharge cold filter box 222;

[0087] A vacuum cleaner 311 is installed at one end of the air intake buffer box 217. A vacuum cleaner operation pipe 312 is connected through the top of the vacuum cleaner 311. The side ends of the vacuum cleaner operation pipe 312 are respectively installed through the vacuum cleaner fixed box 301 and one end of the external discharge cold filter box 222 to realize the vacuuming and slag discharge treatment.

[0088] Both the vacuuming operation pipe 312 and the exhaust operation pipe 310 have an operation processing valve 313 embedded at one end;

[0089] A sealing cover plate 314 is hinged to one end of the air intake buffer box 217, and an internal cleaning electric slide rail 315 is installed on one end of the inner side of the air intake buffer box 217. An internal cleaning treatment plate 316 is installed on one end of the internal cleaning electric slide rail 315 through the slide rail seat.

[0090] An upward push electric actuator 317 is installed at one end of the inner side of the close-separated limit frame 1. An upward push material rack 318 is installed at the top of the upward push electric actuator 317. The upward push material rack 318 is placed inside the close-separated limit frame 1 to realize the upward push to replace the upper convex lower clamp 206.

[0091] Both the top of the upper pusher frame 318 and the lower pressure support plate 205 are embedded with a feed electromagnet 319.

[0092] A sealed electric slide rail 320 is equidistantly embedded on one side of the sealed limit frame 1, and a sealed isolation plate 321 is installed on one end of the sealed electric slide rail 320 through the slide rail seat.

[0093] To ensure stable operation of the equipment, the input terminals of the slag cleaning motor 305, gas analyzer 309, vacuum cleaner 311, operation processing valve 313, internal cleaning electric slide rail 315, upward push electric actuator 317, advance and stop electromagnet 319, and sealed electric slide rail 320 are all electrically connected to the output terminal of the external controller.

[0094] The signal output terminal of the gas analyzer 309 is electrically connected to the signal input terminal of the external controller.

[0095] The working principle and usage process of this invention are as follows: When purifying nitrogen oxides in industrial exhaust gas using SCR catalysis, the injection operation pipe 219 is opened through the linkage treatment valve 230. At this time, the industrial exhaust gas enters the inner side of the intake buffer box 217 through the injection operation pipe 219. When the exhaust gas enters the inner side of the intake buffer box 217 through the injection operation pipe 219, the airflow enters the large space from the small space. At this time, the airflow decreases and flows upward. The porous guide bucket 218 is used to block and limit the airflow. At this time, the airflow flows downward from the intake buffer box 217. The airflow injection and the downward airflow impact each other, further slowing down the airflow velocity. At this time, some impurities in the airflow settle downward to the inner side of the intake buffer box 217 under the action of gravity, realizing the partial slag removal treatment of the exhaust gas.

[0096] Part of the exhaust gas after slag removal enters the inner side of the sealed limiting frame 1 through the air intake buffer box 217. The exhaust gas flows upward along the sealed limiting frame 1. When the exhaust gas reaches the position of the porous limiting plate 211, the airflow is restricted again, causing it to flow in reverse for counter-current treatment. In conjunction with the porous guide bucket 218 reducing the size of the air inlet and limiting the airflow, the blocking screen cylinder 213 further slows down the airflow, and the flow limiting screen plate 214 intercepts impurities. Through the counter-current counter-current of the exhaust gas and the small-hole air intake, the exhaust gas is effectively countered. Large-hole air outlet and multi-position mesh components block air intake impurities. By using multiple stages to slow down the airflow and block impurities, the exhaust gas is fully deslag-removed, reducing the content of smoke and dust in the exhaust gas. After the exhaust gas passes through the multi-hole limiting plate 211, the temperature of the exhaust gas is detected by the temperature detector 215. When the temperature is below 300°C, the air heater 229 heats the exhaust gas. After the exhaust gas is heated to above 300°C, it flows towards the reciprocating closing frame 202.

[0097] Simultaneously with exhaust gas injection, filtration, and temperature control, the intake heat pipe 224 is opened via the linkage treatment valve 230. Liquid ammonia flows along the intake heat pipe 224, which is then protected by the protective isolation sleeve 223. The intake heat pipe 224 absorbs heat emitted from the exhaust cold filter box 222, achieving liquid ammonia heating treatment. The pre-heated liquid ammonia flows along the intake heat pipe 224 to the annular heating pipe 226. The annular heating pipe 226 and the upper spray retainer pipe 227 are electrically heated by the electric heating fixing box 225. Under the combined effects of natural heat absorption and electric heating, the liquid ammonia evaporates into ammonia gas, which is then heated to 300°C. The high-temperature ammonia gas is injected into the inner side of the sealed limiting frame 1 through the upper spray retainer pipe 227 and the slow-spray intake hopper 228. At this point, ammonia gas is injected from bottom to top. When the ammonia gas rushes into the inner side of the sealed limiting frame 1, it mixes with the exhaust gas. At this point, the gas detector 216 detects the nitrogen oxide content in ammonia and exhaust gas. The mixed gas continues to flow upward and eventually contacts the upper convex lower bracket 206 position inside the reciprocating closed frame 202. At this point, the air at the upper convex lower bracket 206 position is heated by the air heater 229, and the internal temperature is controlled at 350°C. The mixed gas flows to the upper convex lower bracket 206 position and is catalytically treated by the honeycomb catalytic block 207. At this point, ammonia reacts with nitrogen oxides to generate nitrogen and water vapor. At the same time, a small amount of sulfides in the exhaust gas reacts with ammonia to catalytically generate ammonium bisulfate gas. During the catalytic process, the gas detector 216 located at the upper convex lower bracket 206 position detects and processes the gas after the reaction. At this point, the intake speed is controlled according to the catalytic reaction processing speed to improve the catalytic effect.

[0098] After the reaction is complete, the exhaust gas is discharged upward through the reciprocating closed frame 202, and the mixed gas is discharged into the inner side of the external exhaust cold filter box 222. At this time, the airflow is slowed down by the guide deceleration frame 304 and the closed sealing plate 307 in the external exhaust cold filter box 222. The heat in the mixed gas is transferred to the protective isolation sleeve 223 through the guide deceleration frame 304 and the external exhaust cold filter box 222. The heat is absorbed by the inlet heat conduction pipe 224, and the temperature of the exhaust gas continues to decrease, reducing it to 200°C. At this time, the ammonium bisulfate gas contained in the exhaust gas will condense to form a viscous liquid, achieving the desired effect. Ammonium bisulfate in the exhaust gas is separated and treated. The separated exhaust gas continues to flow along the deceleration frame 304 and the slow-down cooling mesh plate 303, and finally flows to the position of the limiting guide frame 308. At this time, the exhaust gas is detected by the gas analyzer 309. When there is an excess of ammonia or nitrogen oxides in the exhaust gas, the circulation return pipe 220 is opened by the linkage treatment valve 230. The return fan 221 draws the exhaust gas in the external exhaust cold filter box 222 and returns the exhaust gas to the inside of the intake buffer box 217 along the circulation return pipe 220, so as to achieve full gas treatment and improve its catalytic purification effect.

[0099] The exhaust gas after denitrification is completed is discharged through the external discharge operation pipe 310, realizing continuous gas purification operation from bottom to top. When the gas is reduced and ammonium bisulfate is separated, the slag cleaning motor 305 drives the slag cleaning scraper 306 to rotate along the flow reduction frame 304. The slag cleaning scraper 306 pushes the ammonium bisulfate attached to the surface of the flow reduction frame 304 and pushes it into the inside of the external discharge cold filter box 222. Through continuous slag cleaning, the stability of continuous gas intake and exhaust at the position of the flow reduction frame 304 is ensured.

[0100] After a period of processing, the air injection operation pipe 219 is closed by the linkage processing valve 230, and the closing arc limit plate 210 is moved by the closing electric slide rail 209 to open the external discharge operation port 208. At this time, the reciprocating closing frame 202 driven by the vibrating screen motor 203, under the vibration assistance of the spring linkage rod 201, vibrates and separates the impurities and dust attached to the surface of the upper convex lower card frame 206 and the honeycomb catalyst block 207. At the same time as separation, the dust suction operation pipe 312 is opened by the operation processing valve 313, and the dust and dust located at the dust suction fixed box 301 and the external discharge cold filter box 222 are extracted by the vacuum cleaner 311 and the dust suction operation pipe 312. Impurities are removed, and internal slag removal is achieved quickly to prevent excessive dust accumulation from clogging the honeycomb catalyst block 207 and the blocking deceleration porous bucket 212, thereby improving the efficiency of air intake and catalysis. At the same time, the rotating sealing cover 314 opens the air intake buffer box 217, and the internal cleaning plate 316 moves along the air intake buffer box 217 via the internal cleaning electric slide rail 315. The internal cleaning plate 316 pushes the deposited dust outward, achieving cleaning treatment inside the air intake buffer box 217. Through multi-position automatic cleaning treatment, excessive dust accumulation is prevented, which could cause dust to be stirred up and block the equipment, thus improving the stability of continuous operation of the equipment.

[0101] When it is necessary to replace the honeycomb catalyst block 207, the sealed isolation plate 321 is opened by the sealed electric slide rail 320. At this time, the staff puts the new upper convex lower clamp 206 and the honeycomb catalyst block 207 into the top of the upper pusher rack 318 in the sealed isolation rack 1. The upper convex lower clamp 206 is magnetically attracted by the upper convex lower clamp 206 by the feed electromagnet 319. The upper pusher rack 318 is raised by the upper push electric push rod 317. The upper pusher rack 318 pushes the upper... The convex lower bracket 206 rises, at which point the top of the upper convex lower bracket 206 contacts the bottom of the upper convex lower bracket 206 located at the position of the reciprocating closing frame 202, pushing the upper convex lower bracket 206 to rise. During the rising process, the side of the upper convex lower bracket 206 contacts the bottom of the lower pressure upper support plate 205, pushing the lower pressure upper support plate 205 to rotate. When the upper convex lower bracket 206 located at the top of the reciprocating closing frame 202 is pushed close to the sealing isolation plate 321... When the position is reached, the worker removes the upper convex lower bracket 206 from the top. Then, the worker continues to push the upper convex lower bracket 206 past the position of the lower pressing upper support plate 205. At this point, under the action of the spring hinge, the lower pressing upper support plate 205 rotates back to its original position along the reciprocating closing frame 202. At this point, the lower pressing upper support plate 205 is perpendicular to the reciprocating closing frame 202. The upward push electric actuator 317 drives the upward pusher frame 318 to move downward, pulling the upper convex lower bracket 206 downward, causing the upper convex lower bracket to... The bottom end of the lower clamp 206 is attached to the upper end of the lower support plate 205 and the upper clamp 206 is magnetically fixed by the upper support plate 205 and the upper clamp 206, so as to realize the replacement of the upper clamp 206. Then, the upper push rod 317 drives the upper push material rack 318 to reset, so as to realize the rapid loading and unloading process, ensuring the speed and efficiency of material changing, while eliminating the need for disassembly and assembly of the equipment, reducing the difficulty and cumbersomeness of operation.

[0102] This invention effectively removes dust from flue gas through multi-stage deceleration, counter-impact, screen interception, and online vibration cleaning of the catalyst, preventing catalyst blockage and ensuring the effective surface area for the catalytic reaction. Combined with temperature detection and multi-stage heating (flue gas heating, ammonia preheating, and electric auxiliary heating), the entire reaction process is ensured to be within the optimal and stable temperature range, preventing ammonia decomposition and avoiding byproduct condensation.

[0103] This invention utilizes data from gas detectors and gas analyzers to adjust the ammonia injection rate and recirculation ratio in real time, achieving closed-loop optimization control based on multivariate data (temperature, NOx concentration, NH3 concentration). This improves reaction efficiency and reduces ammonia slip. It integrates automatic slag removal, dust extraction, and rapid material change mechanisms, significantly reducing equipment maintenance intensity, time, and costs, and ensuring continuous and stable system operation.

[0104] Example 2

[0105] like Figures 1-11 As shown in the figure, this embodiment provides an SCR denitrification efficiency optimization device based on multivariate data fusion, the main body of which is a vertically arranged cylindrical main shell (sealed limiting frame 1). The bottom of the sealed limiting frame 1 is connected to the air inlet buffer box 217, and the top is connected to the external exhaust cold filter box 222.

[0106] Flue gas process and treatment:

[0107] Industrial exhaust gas enters the intake buffer box 217 through the injection control pipe 219. The airflow suddenly expands within the box, its velocity decreases, and some large particles settle under gravity. Subsequently, the flue gas rises into the sealed limiting frame 1, passing sequentially through the porous guide hopper 218, the multi-stage porous limiting plate 211, the blocking mesh cylinder 213, and the flow-limiting mesh plate 214. These components, by altering the flow cross-section, cause the airflow to repeatedly experience acceleration, deceleration, reversal, and even counter-current, creating turbulence, and efficiently intercepting and capturing dust in the flue gas.

[0108] During the flow of the flue gas through the aforementioned components, the temperature detector 215 monitors the flue gas temperature in real time. If the temperature is below 300°C, the air heater 229 is activated to heat the flue gas, ensuring that it reaches the optimal reaction temperature (300-400°C).

[0109] Ammonia process and mixing:

[0110] Liquid ammonia is transported via an inlet heat-conducting pipe 224. This pipe, installed within a protective isolation sleeve 223, absorbs residual heat from the high-temperature exhaust gas in the cold filter box 222, providing initial heating to the liquid ammonia. Subsequently, the liquid ammonia enters an annular heating pipe 226, where an electrically heated fixing box 225 provides precise electric auxiliary heating, ensuring complete vaporization and heating to approximately 300°C. The high-temperature ammonia gas is then ejected upwards from the bottom region of the sealed limiting frame 1 via an upward-spraying I-Card 227 and a top-mounted slow-spraying inlet hopper 228, thoroughly mixing with the pre-treated and heated flue gas flowing downwards. A gas detector 216 monitors the concentrations of NH3 and NOx in the mixed gas in real time.

[0111] Catalytic reaction:

[0112] The thoroughly mixed gas continues to rise and enters the core region of the catalytic reaction. This region consists of a reciprocating closed frame 202 and its internal multi-layered upper and lower convex brackets 206 and honeycomb catalyst blocks 207. Under the action of the catalyst, NH3 and NOx undergo a reduction reaction to produce N2 and H2O. Simultaneously, the vibrating screen motor 203 can operate periodically, driving the entire reciprocating closed frame 202 to produce slight vibrations via the spring linkage rod 201, shaking off the dust adhering to the surface of the honeycomb catalyst blocks 207 and maintaining the catalyst activity.

[0113] Exhaust gas aftertreatment and recirculation:

[0114] The exhaust gas after the reaction enters the external cold filter box 222. Here, the exhaust gas flows through the flow-guiding deceleration frame 304 and the slowing cooling mesh plate 303, increasing the flow path and slowing the flow velocity. At the same time, its heat is continuously absorbed by the liquid ammonia in the inlet heat conduction pipe 224 coiled outside the box, and the temperature drops rapidly to about 200°C. During this process, the gaseous ammonium bisulfate (ABS) in the exhaust gas condenses into a liquid viscous substance, which adheres to the surface of the flow-guiding deceleration frame 304. The slag removal motor 305 drives the slag removal scraper 306 to rotate, scraping off these by-products, which are then collected and cleaned periodically.

[0115] Gas analyzer 309 performs final testing on the exhaust gas before it is emitted. If NOx or NH3 exceed the standard, the control system will activate the return fan 221, which will guide part of the exhaust gas back to the intake buffer box 217 through the recirculation return pipe 220 for secondary treatment to ensure that the emission meets the standards. The finally purified gas is discharged through the exhaust operation pipe 310.

[0116] Dust removal and maintenance:

[0117] After the equipment has been running for a period of time, the dust removal procedure can be initiated. Close the air injection control pipe 219, open the external exhaust control port 208, start the vibrating screen motor 203 to vibrate and remove dust, and simultaneously start the vacuum cleaner 311. The dust that has been shaken off, as well as the accumulated dust in the external exhaust cold filter box 222, will be sucked away through the vacuum control pipe 312. Additionally, open the sealing cover 314 of the air inlet buffer box 217, and the internal cleaning plate 316 can be moved via the internal cleaning electric slide rail 315 to clean the dust accumulated at the bottom of the box.

[0118] When catalyst replacement is required, the sealed isolation plate 321 is opened via the sealed electric sliding rail 320. The new upper convex lower clamp 206 (with the honeycomb catalyst block 207 already installed) is placed into the upper pusher rack 318, and the step-holding electromagnet 319 is energized to hold it in place. The upper pusher rod 317 pushes the upper pusher rack 318 upward, pushing the new catalyst rack into the reciprocating closed frame 202, while simultaneously pushing out the top old catalyst rack, which can then be removed from the top by the operator. The entire replacement process does not require disassembly of the main equipment structure, making it quick and convenient.

[0119] All electrical components, including the vibrating screen motor 203, temperature detector 215, gas detector 216, backflow fan 221, air heater 229, electric heating box 225, slag cleaning motor 305, gas analyzer 309, vacuum cleaner 311, upward push electric actuator 317, and advance and stop electromagnet 319, are electrically connected to an external controller to achieve automated operation and intelligent control.

[0120] This invention utilizes a combination of a multi-catalytic separation component and a separation and filtration component, along with interception and screening, vibrating screening, dust collection and cleaning, heat absorption and heating, temperature measurement, and gas detection, to continuously and synchronously treat the smoke and dust in the exhaust gas, the temperature of the catalytic reaction, the catalytic contact area, and the diversion and filtration of the catalytic exhaust gas. This enhances the catalytic reaction effect of nitrogen oxides and injected ammonia in the exhaust gas, thereby effectively improving the efficiency of exhaust gas denitrification.

[0121] This invention features a multi-stage catalytic converter assembly. Air is injected into the intake buffer box via an injection pipe. Combined with a porous guide bucket, the intake deceleration and convection are utilized. Further deceleration is achieved through a porous limiting plate, a blocking and decelerating porous bucket, and a blocking mesh cylinder. Simultaneously, the exhaust gas flows in the opposite direction after reaching the top. Through a small-space intake, a large-space exhaust, and the counter-current flow of the exhaust gas, the airflow velocity is reduced, creating turbulence and further slowing the flow. Under the reduced airflow velocity and the restrictive effect of the mesh blocking structure, the dust in the exhaust gas is intercepted, achieving dust removal. A spring linkage rod, a reciprocating closing frame, a vibrating screen motor, and a sealing isolation ring drive the upper and lower brackets and the honeycomb catalytic block to vibrate. This slow vibration achieves dust removal from the catalytic components. Through dust interception and removal, the dust content when the flue gas contacts the catalytic components is reduced, while dust adhesion is decreased, increasing the contact area for the catalytic reaction and ensuring the efficiency of the catalytic reaction.

[0122] The temperature of the exhaust gas is detected by a temperature detector, and the exhaust gas is continuously and constantly heated by a multi-position air heater. This is achieved through a combination of an intake heat pipe, an external exhaust cold filter box, an electric heating fixing box, a ring heating pipe, and an upper spray duct. Utilizing the principle of liquid ammonia vaporization and heat absorption, and employing multi-stage heating, the ammonia flows through multiple stages to absorb heat and mix with the exhaust gas. This, along with multi-position and bottom air intake mixing, ensures thorough mixing of the ammonia and exhaust gas. The temperature of the exhaust gas is controlled, and the temperature of the catalytic environment is kept constant through temperature control and multi-position uniform mixing. A gas detector monitors the nitrogen oxide content in the ammonia and exhaust gas, and a recirculation pipe and recirculation fan drive airflow circulation to adjust the mixing amount of ammonia and exhaust gas, improving the catalytic effect and efficiency, reducing ammonia overflow and incomplete exhaust gas treatment, and ultimately enhancing the actual catalytic efficiency and effect.

[0123] By coordinating multi-stage airflow control and removal treatment with equipment temperature control and mixture quantity control, this technology effectively solves the problem in existing technologies where dust in the flue gas comes into contact with the catalytic components, causing dust to cover the catalytic components and affecting catalytic efficiency. By using dust interception and vibration dust removal treatment, the catalytic components are cleaned, ensuring their catalytic contact area. Combined with temperature control, this improves catalytic efficiency and effect, guarantees the speed of actual catalytic reaction and tail gas treatment, and enhances denitrification efficiency.

[0124] This invention is equipped with a filtration and separation component. The exhaust gas after catalysis is cooled by an external cold filter box. The flow rate is reduced by a flow deceleration frame and a closed sealing plate. By extending the flow path and using liquid ammonia to absorb heat for rapid cooling, the ammonium bisulfate gas in the exhaust gas will condense into a viscous liquid, thus separating the ammonium bisulfate from the exhaust gas. The exhaust gas is detected by a gas analyzer. The exhaust gas is circulated by a return fan and a circulating return pipe, which improves the thoroughness of exhaust gas treatment and ensures the effectiveness of catalytic purification.

[0125] The cleaning motor drives the cleaning scraper to rotate, which in turn moves impurities on the surface of the deceleration frame, thus achieving cleaning. This, combined with a vacuum cleaner and suction pipe, removes dust and impurities from the dust collection box and external cold filter box, enabling rapid internal cleaning. This prevents excessive dust accumulation from clogging the honeycomb catalyst blocks again, improving catalytic stability and extending the lifespan of the catalyst components. The upward-pushing electric actuator drives the upward-pushing feed rack, which in turn moves the upper and lower convex brackets up and down. The downward-pressing support plate positions and supports the upper and lower convex brackets, allowing for quick replacement of catalyst components without disassembly, reducing operational difficulty and complexity, and improving maintenance efficiency.

[0126] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for optimizing SCR denitrification efficiency based on multivariate data fusion, characterized in that, It includes a main housing, within which a catalytic reaction module and an exhaust gas treatment module are disposed; The catalytic reaction module includes: An air intake buffer box is located at the bottom of the main housing. The air intake buffer box is equipped with a porous guide bucket to slow down the air intake airflow and initially settle impurities. The multi-stage filtration and deceleration mechanism is located above the air intake buffer box inside the main housing. It includes a perforated limiting plate, a blocking and deceleration perforated bucket, and a blocking mesh cylinder, which are used to decelerate the flue gas in multiple stages and remove dust deeply. Temperature detectors and gas detectors are installed inside the main housing to monitor flue gas temperature and gas composition; An air heater, disposed within the main housing, is used to heat the flue gas; The ammonia supply and heating system includes an inlet heat conduction pipe, an annular heating pipe and an upper spray I-Card pipe connected in sequence. The inlet heat conduction pipe is thermally coupled to the exhaust gas treatment module to absorb waste heat. The annular heating pipe is equipped with an electric heating fixing box for auxiliary heating, which is used to evaporate and heat the liquid ammonia and then spray it into the main shell to mix with the flue gas. The reciprocating closing frame is connected to the main housing via a spring linkage rod and is driven by a vibrating screen motor to generate vibration. It contains multiple layers of honeycomb catalyst blocks that can be detachably installed inside. A recirculation return pipe connects the exhaust gas treatment module and the intake buffer box, and is equipped with a return fan; The exhaust gas treatment module includes: An external exhaust cold filter box is connected to the top of the main housing. The external exhaust cold filter box is equipped with a flow deceleration frame and a cooling mesh plate to reduce the exhaust gas velocity and temperature. The slag removal mechanism includes a slag removal scraper driven by a slag removal motor, used to remove byproducts condensed on the deceleration frame; A gas analyzer is installed inside the external exhaust cold filter box to detect the composition of the treated exhaust gas.

2. The SCR denitrification efficiency optimization device based on multivariate data fusion according to claim 1, characterized in that, The reciprocating closed frame is connected to a lower pressure upper support plate via a spring hinge on its inner side. The honeycomb catalyst block is placed in a frame composed of an upper convex and lower clamping structure and is supported on the lower pressure upper support plate.

3. The SCR denitrification efficiency optimization device based on multivariate data fusion according to claim 2, characterized in that, The main housing is provided with a sealed isolation plate driven by a sealed electric slide rail on the side. Inside the sealed isolation plate is an upward push electric push rod. The top of the upward push electric push rod is provided with an upward feeding rack. Both the upward feeding rack and the downward pressing support plate are provided with a feed electromagnet for adsorbing and fixing the upper convex lower bracket.

4. The SCR denitrification efficiency optimization device based on multivariate data fusion according to claim 1, characterized in that, The main housing and the reciprocating closing frame are provided with an external discharge operation port. The external discharge operation port is provided with a closing arc limit plate driven by a closing electric slide rail, which is used to seal or open the external discharge operation port.

5. The SCR denitrification efficiency optimization device based on multivariate data fusion according to claim 1, characterized in that, The intake buffer box is hinged to a sealing cover at one end, and an internal cleaning plate driven by an internal cleaning electric slide rail is installed inside.

6. The SCR denitrification efficiency optimization device based on multivariate data fusion according to claim 1, characterized in that, The exhaust gas treatment module also includes a vacuum cleaner, which is connected to the vacuum fixing box on the side of the main housing and the external exhaust cold filter box via a vacuum operation pipe.

7. The SCR denitrification efficiency optimization device based on multivariate data fusion according to claim 1, characterized in that, The intake heat pipe is coiled inside the protective isolation sleeve, which is attached to the outer wall of the exhaust cold filter box to achieve heat exchange.

8. The SCR denitrification efficiency optimization device based on multivariate data fusion according to claim 3, characterized in that, The temperature detector, the gas detector, the gas analyzer, the vibrating screen motor, the air heater, the electric heating box, the return fan, the slag cleaning motor, the upward push electric actuator, and the advance electromagnet are all electrically connected to an external controller, forming a closed-loop control system based on multivariate data feedback.

9. The SCR denitrification efficiency optimization device based on multivariate data fusion according to claim 1, characterized in that, The porous guide bucket, the porous limiting plate, the blocking and decelerating porous bucket, the blocking mesh cylinder, and the flow limiting mesh plate are arranged alternately in the main shell along the airflow direction. By changing the cross-sectional area and direction of the airflow channel, turbulence and counterflow are formed to promote dust settling.

10. The method of using the SCR denitrification efficiency optimization device based on multivariate data fusion according to any one of claims 1-9, characterized in that, Includes the following steps: The flue gas is slowed down and deeply dusted through a multi-stage filtration and deceleration mechanism; The flue gas temperature is monitored using a temperature detector, and the flue gas is heated to a preset reaction temperature using an air heater; Using an ammonia supply and heating system, liquid ammonia is evaporated and heated by absorbing waste heat from the tail gas and electric auxiliary heating, and then mixed with the pretreated flue gas. The mixed gas undergoes a catalytic reduction reaction by passing through a multi-layered honeycomb catalytic block within a vibrating reciprocating closed frame. The composition of gases during the reaction process is monitored in real time using a gas detector, and the circulation volume of unreacted gases is adjusted by using a circulation reflux pipe and a reflux fan. The exhaust gas after the reaction is cooled in an external cold filter box, which condenses the ammonium bisulfate and removes it through a slag removal mechanism. The final exhaust gas is tested using a gas analyzer, and emissions are only allowed after it meets the standards.

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