A waste flue gas denitrification device and method for thermal power plants

Abstract

The present invention discloses a waste flue gas denitrification device and method for thermal power plants, which relates to the field of waste gas treatment technology. The device comprises a water storage tank, a dust suppression cooling assembly disposed inside a pretreatment tank, a filter plate fixedly connected to the bottom of a denitrification tower, a guide plate fixedly connected to the top surface of a support rod, a filter screen disposed above the guide plate, and a flue gas denitrification assembly disposed inside the filter screen. The flue gas denitrification assembly comprises two drive motors fixedly connected to one end of the top surface of the filter screen, and a chimney fixedly mounted on the top surface of the denitrification tower. The device and method for waste flue gas denitrification for thermal power plants disclosed by the present invention have the advantages of cooling high-temperature waste flue gas, removing fly ash from the waste flue gas, preventing fly ash from entering the denitrification tower and causing blockage, performing multi-stage denitrification treatment on the waste flue gas by spraying an adsorption liquid, allowing the waste flue gas to fully contact and react with the adsorption liquid, and achieving good denitrification effect and high efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas treatment, and in particular to a waste flue gas denitration device and method for thermal power plants. Background Art

[0002] Thermal power plants, also known as thermal power plants, are factories that use combustible materials as fuel to produce electricity. When boilers burn pulverized coal for energy conversion, they also emit large amounts of pollutants into the environment. Statistics show that 67% of atmospheric NOx emissions come from coal combustion. Nitrogen oxides (NO, NO2, abbreviated as NOx) emissions are one of the main causes of a series of serious pollution problems such as acid rain and photochemical smog. Therefore, it is very necessary to control NOx in coal-fired boilers in thermal power plants.

[0003] During the operation of a thermal power plant, a large amount of harmful flue gas will be generated by the combustion of combustibles. The existing flue gas denitrification device mainly uses the denitrification spray method. During the spray denitrification process, there is insufficient contact between the flue gas and the adsorption liquid. Denitrification relying solely on a single spraying method will result in uneven spraying, which directly affects the denitrification effect and has low denitrification efficiency. Summary of the Invention

[0004] The present invention discloses a waste flue gas denitrification device and method for thermal power plants, aiming to solve the technical problems of insufficient contact between flue gas and adsorption liquid during spray denitrification, uneven spraying when relying solely on a single spraying method, directly affecting the denitrification effect and low denitrification efficiency.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A waste flue gas denitrification device for a thermal power plant includes a water storage tank, a pretreatment box fixedly installed on the top surface of the water storage tank, one end of the pretreatment box fixedly connected to a smoke inlet pipe, and a dust reduction cooling component is provided inside the pretreatment box, an end of the pretreatment box away from the smoke inlet pipe is fixedly connected to a smoke outlet pipe, and an end of the smoke outlet pipe away from the pretreatment box is fixedly connected to a denitrification tower, a filter plate is fixedly connected to the bottom of the denitrification tower, a support rod is fixedly connected to the top surface of the filter plate, a guide plate is fixedly connected to the top surface of the support rod, a filter mesh cylinder is fixedly connected to the inner wall of the denitrification tower, the filter mesh cylinder is arranged above the guide plate, and a flue gas denitrification component is provided inside the filter mesh cylinder, the flue gas denitrification component includes two drive motors, the two drive motors are fixedly connected to one end of the top surface of the filter mesh cylinder, and an outlet chimney is fixedly installed on the top surface of the denitrification tower.

[0007] By arranging a water storage tank, a pretreatment tank, a smoke inlet pipe, a dust reduction cooling component, a smoke outlet pipe, a denitrification tower, a filter plate, a support rod, a guide plate, a filter mesh cylinder, a flue gas denitrification component and a smoke outlet chimney, the water in the water storage tank is sprayed on the waste flue gas through the dust reduction cooling component to cool the waste flue gas and remove fly ash in the waste flue gas. Then, the adsorption liquid is sprayed downward through the flue gas denitrification component to realize flue gas denitrification treatment, and the adsorption liquid is sprayed on the inner wall of the filter mesh cylinder at the same time. After the preliminary denitrification treatment, the waste flue gas enters the filter mesh cylinder and further contacts with the adsorption liquid to realize further denitrification treatment, so that the waste flue gas and the adsorption liquid are fully contacted and reacted, and the denitrification effect is good and the efficiency is high.

[0008] In a preferred solution, the dust reduction cooling component includes a water pump, which is fixedly connected to the outer wall of the water storage tank, and the input end of the water pump is fixedly connected to the water outlet of the water storage tank through a pipeline, the output end of the water pump is fixedly connected to a water pipe, the end of the water pipe away from the water pump is fixedly connected to a spray seat, the output end of the spray seat is fixedly connected to a spray head, the spray head is arranged inside the pretreatment box, a filter screen is fixedly installed on the inner wall of the bottom surface of the pretreatment box, and sewage doors are installed on the outer walls of both sides of the pretreatment box, and the sewage doors are arranged at both ends of the filter screen; the outer wall of the pretreatment box is fixedly connected to a sealing box, and a dual-axis motor 1 is fixedly installed on the middle of the inner wall of the sealing box, and a dual-axis motor 1 is fixedly installed on the middle of the inner wall of the sealing box. The two output shafts are connected to the screw rod through the coupling, and the surface of the screw rod is threadedly connected to the moving seat 1, and the inside of the sealing box is fixedly connected to the guide rod, and the moving seat 1 is slidably arranged on the surface of the guide rod; the outer wall of the moving seat 1 is fixedly connected to the moving frame, and the bottom surface of the moving frame is fixedly connected to multiple elastic rods, the bottom end of the elastic rod is fixedly connected to the cleaning brush 1, and the cleaning brush 1 is slidably arranged on the top surface of the filter screen plate. A rack is movably provided inside the moving frame, and the surface of the rack is meshed with a toothed gear. The outer wall of the moving frame is fixedly connected to the fixed plate, and the outer wall of the fixed plate is fixedly connected to the driving motor 1. The power output shaft of the driving motor 1 is connected to the toothed gear through the coupling.

[0009] By setting up a dust reduction cooling component and starting the water pump, water is sprayed on the waste flue gas from the sprinkler head to cool the waste flue gas and remove fly ash in the waste flue gas. The sprayed water is filtered through the filter plate and then re-enters the water storage tank, realizing the recycling of water and improving the utilization efficiency of water resources. The water pipe is started to clean the soot on the filter plate to avoid clogging of the filter plate.

[0010] In a preferred solution, the power output shaft of the driving motor 2 is connected to the gear 1 through a coupling transmission, the surface of the gear 1 is meshed with the gear 2, the gear 2 is rotatably arranged in the middle of the top inner wall of the denitrification tower, and the bottom surface of the gear 2 is fixedly connected to the rotating rod, and the outer wall of the rotating rod is fixedly connected to the centrifugal fan blade; the bottom outer wall of the rotating rod is fixedly connected to two symmetrically arranged mounting brackets, and the mounting bracket is rotatably arranged with a gear 3 at one end away from the rotating rod, the bottom inner wall of the filter cylinder is fixedly connected to an annular rack, the gear 3 is meshed with the annular rack, the top surface of the gear 3 is fixedly connected to a rotating disk, one end of the top surface of the rotating disk is fixedly connected to an eccentric rod, and the surface of the eccentric rod is rotatably provided with a steering plate, The internal sliding of the mounting frame is provided with a movable seat 2, the top surface of the movable seat 2 is fixedly connected with a fixed rod, the end of the steering plate away from the eccentric rod is rotatably provided on the surface of the fixed rod, and the bottom surface of the output end of the movable seat 2 is fixedly connected with an atomizing nozzle 1; the outer wall of the water storage tank on the side away from the smoke inlet pipe is fixedly connected with a bracket 3, the outer wall of the bracket 3 is fixedly connected with a bracket 4, the bracket 4 is fixedly connected to the outer wall of the denitrification tower, the bottom surface of the bracket 3 is fixedly installed with an adsorption liquid tank, and the bottom surface of the bracket 3 is fixedly installed with a liquid outlet pump, the input end of the liquid outlet pump is fixedly connected to the liquid outlet of the bracket 3 through a pipeline, the output end of the liquid outlet pump is fixedly connected with an upper pipeline, and the end of the upper pipeline away from the liquid outlet pump is rotatably connected with a rotary joint, which rotates The joint is rotatably arranged at the top end of the filter screen cylinder, the interior of the rotary joint is fixedly connected to the lower pipeline, the outer wall of the lower pipeline is fixedly connected to the infusion tube 1, and the infusion tube 1 is fixedly connected to the input end surface of the movable seat 2; the interior of the rotating rod is fixedly connected to the dual-axis motor 2, and the outer wall of the rotating rod is fixedly connected to the bracket 1, the two power output shafts of the dual-axis motor 2 are fixedly connected to the output rod through a coupling, the surface of the output rod is rotatably provided with an eccentric plate, the eccentric plate is rotated and slidably provided with an eccentric rotating rod at one end away from the output rod, the eccentric rotating rod is slidably provided with a connecting rod 1 at one end away from the eccentric plate, both ends of the connecting rod 1 are fixedly connected to the connecting plate, and both ends of the outer wall of the bracket 1 are fixedly connected to the fixed seat, The end of the fixed seat away from the bracket one is fixedly connected to the connecting rod 2, and the end of the connecting plate away from the connecting rod one is rotatably set on the surface of the connecting rod 2. The outer wall of the connecting rod 2 is fixedly connected to the atomizing nozzle 2, and the output direction of the atomizing nozzle 2 is toward the side of the filter cylinder. The input end of the atomizing nozzle 2 is fixedly connected to the infusion tube 2, and the end of the infusion tube 2 away from the atomizing nozzle 2 is fixedly connected to the surface of the lower pipeline; the bottom surface of the rotating rod is fixedly connected to the lower connecting rod, and the outer walls on both sides of the bottom of the lower connecting rod are fixedly connected to the bracket 2, and the outer walls of the side where the two brackets 2 are close to each other are fixedly connected to a spring, and the end of the spring away from the bracket 2 is fixedly connected to the cleaning brush 2, and the cleaning brush 2 is slidably set on the outer wall of the filter cylinder.

[0011] By providing a flue gas denitrification component, a third bracket, a fourth bracket, an adsorption liquid tank, a liquid outlet pump and an upper pipeline, starting the second driving motor, the second movable seat slides back and forth along the inside of the mounting frame, and at the same time the mounting frame drives the first atomizing nozzle to rotate together, starting the liquid outlet pump and opening the first atomizing nozzle, so that the adsorption liquid in the adsorption liquid tank is sprayed downward by the first atomizing nozzle, the adsorption liquid is evenly contacted with the waste flue gas, and denitrification treatment of the waste flue gas is achieved, starting the second dual-axis motor, so that the second atomizing nozzle rotates back and forth up and down, opening the second atomizing nozzle, the adsorption liquid in the adsorption liquid tank is sprayed by the second atomizing nozzle on different positions of the inner wall of the filter mesh tube, so that the adsorption liquid is evenly attached to the inner wall of the filter mesh tube, the waste flue gas is further evenly contacted with the adsorption liquid, and further denitrification treatment of the waste flue gas is achieved, with good denitrification effect and high efficiency.

[0012] A method for denitrifying waste flue gas from a thermal power plant, using the above-mentioned denitrifying device for waste flue gas from a thermal power plant, comprises the following steps:

[0013] Step 1: The waste flue gas enters the pretreatment box 2 through the flue gas inlet pipe 3, and the water pump 501 is started. The water in the water storage tank 1 is sprayed on the waste flue gas through the spray head 504 to cool the waste flue gas and remove fly ash in the waste flue gas;

[0014] Step 2: The pre-treated waste flue gas is discharged through the flue gas outlet pipe 7 and enters the denitrification tower 8. The second drive motor 1301 is started to rotate the rotating rod 1304, and the liquid outlet pump 18 is turned on to spray the adsorption liquid downward through the atomizing nozzle 1314 to achieve flue gas denitrification treatment;

[0015] Step 3: Start the dual-axis motor 2 1318 and open the atomizing nozzle 2 1327. The adsorption liquid is sprayed onto the inner wall of the filter cylinder 12 through the atomizing nozzle 2 1327. After preliminary denitrification treatment, the waste flue gas enters the filter cylinder 12 and further contacts with the adsorption liquid to achieve further denitrification treatment. The treated waste flue gas is discharged through the chimney 14.

[0016] From the above, it can be seen that the waste flue gas denitrification device for thermal power plants provided by the present invention has the function of cooling the high-temperature waste flue gas and removing fly ash in the waste flue gas to prevent fly ash from entering the denitrification tower and causing blockage. The waste flue gas is subjected to multi-stage denitrification treatment by spraying adsorption liquid, so that the waste flue gas and the adsorption liquid are fully contacted and reacted, and the denitrification effect is good and the efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of a waste flue gas denitrification device for a thermal power plant proposed by the present invention.

[0018] Figure 2 This is a side view of the overall structure of a waste flue gas denitrification device for a thermal power plant proposed by the present invention.

[0019] Figure 3 This is a side structural cross-sectional view of the water storage tank of a waste flue gas denitration device for a thermal power plant proposed by the present invention.

[0020] Figure 4 This is a side view of the structure of a cleaning brush of a waste flue gas denitrification device for a thermal power plant proposed by the present invention.

[0021] Figure 5 This is a side structural cross-sectional view of a denitration tower of a waste flue gas denitration device for a thermal power plant proposed by the present invention.

[0022] Figure 6 This is a side structural cross-sectional view of the filter cylinder of a waste flue gas denitration device for a thermal power plant proposed by the present invention.

[0023] Figure 7 This is a side structural cross-sectional view of the rotating rod of a waste flue gas denitrification device for a thermal power plant proposed by the present invention.

[0024] Figure 8 This is a side view of the structure of the annular rack of a waste flue gas denitrification device for a thermal power plant proposed by the present invention.

[0025] Figure: 1, water storage tank; 2, pre-treatment box; 3, smoke inlet pipe; 4, sealing box; 5, dust suppression cooling assembly; 501, water pump; 502, water pipe; 503, spray seat; 504, spray head; 505, filter plate; 506, dual-axis motor 1; 507, screw rod; 508, movable seat 1; 509, guide rod; 510, movable frame; 511, elastic rod; 512, cleaning brush 1; 513, gear 514, missing tooth gear; 515, fixed plate; 516, drive motor 1; 6, sewage door; 7, smoke outlet pipe; 8, denitrification tower; 9, filter plate; 10, support rod; 11, guide plate; 12, filter cylinder; 13, flue gas denitrification assembly; 1301, drive motor 2; 1302, gear 1; 1303, gear 2; 1304, rotating rod; 1305, centrifugal fan blade; 1306, mounting bracket;

[0026] 1307, gear three; 1308, ring rack; 1309, rotating disk; 1310, eccentric rod;

[0027] 1311. Steering plate; 1312. Moving seat 2; 1313. Fixed rod; 1314. Atomizing nozzle 1; 1315. Infusion tube 1; 1316. Lower pipeline; 1317. Rotary joint; 1318. Dual-axis motor 2; 1319. Bracket 1; 1320. Output rod; 1321. Eccentric plate; 1322. Eccentric rotating rod; 1323. Connecting rod 1; 1324. Connecting plate; 1325. Connecting rod 2; 1326. Fixed seat; 1327. Atomizing nozzle 2; 1328. Infusion tube 2; 1329. Lower connecting rod; 1330. Bracket 2; 1331. Cleaning brush 2; 14. Chimney; 15. Bracket 3; 16. Bracket 4; 17. Adsorption liquid tank; 18. Liquid outlet pump; 19. Upper pipeline. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0029] The waste flue gas denitrification device for thermal power plants disclosed in the present invention is mainly used in the process of spray denitrification, where there is insufficient contact between flue gas and adsorption liquid. Denitrification relying solely on a single spraying method results in uneven spraying, which directly affects the denitrification effect and leads to low denitrification efficiency.

[0030] Reference Figures 1-8 , a waste flue gas denitrification device for a thermal power plant, comprising a water storage tank 1, a pretreatment box 2 is fixedly installed on the top surface of the water storage tank 1, one end of the pretreatment box 2 is fixedly connected to a smoke inlet pipe 3, and a dust reduction cooling component 5 is arranged inside the pretreatment box 2, the end of the pretreatment box 2 away from the smoke inlet pipe 3 is fixedly connected to a smoke outlet pipe 7, the end of the smoke outlet pipe 7 away from the pretreatment box 2 is fixedly connected to a denitrification tower 8, the bottom of the denitrification tower 8 is fixedly connected to a filter plate 9, the top surface of the filter plate 9 is fixedly connected to a support rod 10, the top surface of the support rod 10 is fixedly connected to a guide plate 11, the inner wall of the denitrification tower 8 is fixedly connected to a filter mesh cylinder 12, the filter mesh cylinder 12 is arranged above the guide plate 11, and a flue gas denitrification component 13 is arranged inside the filter mesh cylinder 12, the flue gas denitrification component 13 includes a second drive motor 1301, the second drive motor 1301 is fixedly connected to one end of the top surface of the filter mesh cylinder 12, and a chimney 14 is fixedly installed on the top surface of the denitrification tower 8.

[0031] Specifically, the waste flue gas enters the pretreatment box 2 through the smoke inlet pipe 3, and the water in the water storage tank 1 is sprayed on the waste flue gas through the dust reduction cooling component 5 to cool the waste flue gas and remove fly ash in the waste flue gas. The pretreated waste flue gas is discharged through the smoke outlet pipe 7 and enters the denitrification tower 8, and the adsorption liquid is sprayed downward through the flue gas denitrification component 13 to achieve flue gas denitrification treatment. At the same time, the adsorption liquid is sprayed on the inner wall of the filter mesh tube 12. After preliminary denitrification treatment, the waste flue gas enters the filter mesh tube 12 and further contacts with the adsorption liquid to achieve further denitrification treatment. The treated waste flue gas is discharged through the chimney 14, realizing multi-stage denitrification treatment of the waste flue gas, so that the waste flue gas and the adsorption liquid are fully contacted and reacted, with good denitrification effect and high efficiency.

[0032] Reference Figure 1 and Figure 4 In a preferred embodiment, the dust reduction cooling component 5 includes a water pump 501, which is fixedly connected to the outer wall of the water storage tank 1, and the input end of the water pump 501 is fixedly connected to the water outlet of the water storage tank 1 through a pipeline, and the output end of the water pump 501 is fixedly connected to a water pipe 502, and the end of the water pipe 502 away from the water pump 501 is fixedly connected to a spray seat 503, and the output end of the spray seat 503 is fixedly connected to a spray head 504, which is arranged inside the pretreatment box 2, and a filter screen 505 is fixedly installed on the inner wall of the bottom surface of the pretreatment box 2. Both sides of the outer wall of the pretreatment box 2 are equipped with sewage discharge doors 6, and the sewage discharge doors 6 are arranged at both ends of the filter screen 505; the outer wall of the pretreatment box 2 is fixedly connected to the sealing box 4, and the middle part of the inner wall of the sealing box 4 is fixedly installed with a dual-axis motor 506, and the two output shafts of the dual-axis motor 506 are both connected. The screw rod 507 is connected to the transmission through the coupling, and the surface of the screw rod 507 is threadedly connected to the movable seat 1 508. The inside of the sealing box 4 is fixedly connected to the guide rod 509, and the movable seat 1 508 is slidably set on the surface of the guide rod 509; the outer wall of the movable seat 1 508 is fixedly connected to the movable frame 510, the bottom surface of the movable frame 510 is fixedly connected to a plurality of elastic rods 511, the bottom end of the elastic rod 511 is fixedly connected to a cleaning brush 1 512, and the cleaning brush 1 512 is slidably set on the top surface of the filter plate 505, and the interior of the movable frame 510 is movably provided with a rack 513, and the surface of the rack 513 is meshed with a toothless gear 514, the outer wall of the movable frame 510 is fixedly connected to a fixed plate 515, and the outer wall of the fixed plate 515 is fixedly connected to a drive motor 1 516, and the power output shaft of the drive motor 1 516 is transmission-connected with the toothless gear 514 through a coupling.

[0033] Specifically, the waste flue gas enters the pretreatment box 2 through the smoke inlet pipe 3, the water pump 501 is started, and the water in the water storage tank 1 is finally sprayed on the waste flue gas by the spray head 504 through the water pipe 502 and the spray seat 503, so as to cool the waste flue gas and remove the fly ash in the waste flue gas. The water after spraying is filtered through the filter plate 505 and then re-enters the water storage tank 1, so as to realize the recycling of water and improve the utilization efficiency of water resources. During the treatment process, the water pipe 502 is started to rotate the screw rod 507, which drives the movable seat 508 to slide along the surface of the screw rod 507. Under the elastic action of the elastic rod 511, the cleaning brush 512 slides along the surface of the filter plate 505, and the filter plate 505 is cleaned. The ash can be cleaned by opening the sewage door 6. When the cleaning brush 1 512 slides to the end of the filter screen plate 505, the dual-axis motor 1 506 is started to rotate the toothless gear 514. The toothless gear 514 engages with the rack 513, so that the rack 513 drives the cleaning brush 1 512 to move upward to the highest position, and the dual-axis motor 1 506 is driven in reverse to return the cleaning brush 1 512 to the upper end of the initial position, and then the driving motor 1 516 is continued to be driven to make the teeth on the toothless gear 514 disengage from the rack 513, so that the cleaning brush 1 512 contacts the filter screen plate 505 again, thereby realizing the cyclic cleaning of the ash on the filter screen plate 505 and avoiding the clogging of the filter screen plate 505.

[0034] It should be noted that the thread structures of the two (507) are in opposite directions, and when driving (506), the two (508) move in opposite directions.

[0035] Reference Figure 1 and Figure 3In a preferred embodiment, the power output shaft of the driving motor 2 1301 is connected to the gear 1 1302 through a coupling, the surface of the gear 1 1302 is meshed with the gear 2 1303, the gear 2 1303 is rotatably arranged in the middle of the inner wall of the top surface of the denitrification tower 8, and the bottom surface of the gear 2 1303 is fixedly connected to the rotating rod 1304, and the outer wall of the rotating rod 1304 is fixedly connected to the centrifugal fan blade 1305; the outer wall of the bottom of the rotating rod 1304 is fixedly connected to two symmetrically arranged mounting brackets 1306, and the mounting brackets 130 The end away from the rotating rod 1304 is provided with a gear 3 1307 for rotation. The bottom inner wall of the filter screen drum 12 is fixedly connected with an annular rack 1308. The gear 3 1307 meshes with the annular rack 1308. The top surface of the gear 3 1307 is fixedly connected with a rotating disk 1309. One end of the top surface of the rotating disk 1309 is fixedly connected with an eccentric rod 1310. The surface of the eccentric rod 1310 is provided with a steering plate 1311 for rotation. The interior of the mounting frame 1306 is provided with a movable seat 2 1312 for sliding. The top surface of the movable seat 2 1312 is fixed. A fixed rod 1313 is fixedly connected, and one end of the deflection plate 1311 away from the eccentric rod 1310 is rotatably arranged on the surface of the fixed rod 1313. The bottom surface of the output end of the movable seat 2 1312 is fixedly connected to the atomizing nozzle 1 1314; the outer wall of the water storage tank 1 away from the smoke inlet pipe 3 is fixedly connected to the bracket 3 15, the outer wall of the bracket 3 15 is fixedly connected to the bracket 4 16, the bracket 4 16 is fixedly connected to the outer wall of the denitrification tower 8, the bottom surface of the bracket 3 15 is fixedly installed with the adsorption liquid tank 17, and the bottom surface of the bracket 3 15 is fixedly installed with the liquid outlet pump 18 The input end of the liquid discharge pump 18 is fixedly connected to the liquid outlet of the bracket 3 15 through a pipe, and the output end of the liquid discharge pump 18 is fixedly connected to the upper pipeline 19. The end of the upper pipeline 19 away from the liquid discharge pump 18 is rotatably connected to the rotary joint 1317. The rotary joint 1317 is rotatably set on the top of the filter screen cylinder 12. The interior of the rotary joint 1317 is fixedly connected to the lower pipeline 1316. The outer wall of the lower pipeline 1316 is fixedly connected to the infusion tube 1315. The infusion tube 1315 is fixedly connected to the input end surface of the movable seat 2 1312.The interior of the rotating rod 1304 is fixedly connected to the dual-axis motor 2 1318, and the outer wall of the rotating rod 1304 is fixedly connected to the bracket 1319. The two power output shafts of the dual-axis motor 2 1318 are fixedly connected to the output rod 1320 through a coupling. The surface of the output rod 1320 is rotatably provided with an eccentric plate 1321. The eccentric plate 1321 is rotatably and slidingly provided with an eccentric rotating rod 1322 at one end away from the output rod 1320. The eccentric rotating rod 1322 is slidably provided with a connecting rod 1323 at one end away from the eccentric plate 1321. Both ends of the connecting rod 1323 are fixedly connected to the connecting plate 1324. Both ends of the outer wall of the bracket 1319 are fixedly connected to a fixing seat 1326. The end of the fixing seat 1326 away from the bracket 1319 is fixedly connected to the connecting rod 2 1325. The connecting plate 1324 is away from the connecting rod One end of shaft 1323 is rotatably mounted on the surface of connecting rod 2 1325. A second atomizing nozzle 1327 is fixedly mounted on the outer wall of connecting rod 2 1325. The output of atomizing nozzle 1327 is directed toward the filter cartridge 12. The input end of atomizing nozzle 1327 is fixedly connected to a second infusion tube 1328. The end of infusion tube 1328, away from atomizing nozzle 1327, is fixedly connected to the surface of lower conduit 1316. A lower connecting rod 1329 is fixedly connected to the bottom surface of rotating rod 1304. Two brackets 1330 are fixedly connected to the outer walls of both sides of the bottom of lower connecting rod 1329. A spring is fixedly attached to the outer walls of the two brackets 1330 on the sides adjacent to each other. A second cleaning brush 1331 is fixedly connected to the end of the spring away from bracket 1330. Cleaning brush 1331 slides against the outer wall of filter cartridge 12.

[0036] Specifically, after pre-treatment, the flue gas enters the denitrification tower 8 from the smoke outlet pipe 7, and the driving motor 2 1301 is started, and the rotating rod 1304 is driven to rotate through the gear 1 1302 and the gear 2 1303, and the rotating rod 1304 drives the mounting frame 1306 to rotate together, and the gear 3 1307 is engaged with the annular rack 1308, so that the rotating disk 1309 rotates accordingly, and the rotating disk 1309 drives the eccentric rod 1310 to move so that the movable seat 2 1312 moves along the mounting frame 1 The interior of 306 slides back and forth, and at the same time, the mounting frame 1306 drives the atomizing nozzle 1314 to rotate together, the liquid outlet pump 18 is started and the atomizing nozzle 1314 is opened, so that the adsorption liquid in the adsorption liquid tank 17 is sprayed downward from the atomizing nozzle 1314 through the upper pipe 19, the lower pipe 1316 and the liquid infusion pipe 1315, and the adsorption liquid is evenly contacted with the waste flue gas to achieve denitrification of the waste flue gas. At the same time, the dual-axis motor 2 1318 is started, and the dual-axis motor 2 1318 drives the output rod 1320 to rotate, causing the eccentric plate 1321 to slide along the surface of the eccentric rotating rod 1322. At the same time, the connecting plate 1324 drives the atomizing nozzle 2 1327 to change its angle, and the atomizing nozzle 2 1327 rotates up and down, opening the atomizing nozzle 2 1327. The adsorption liquid in the adsorption liquid tank 17 is sprayed by the atomizing nozzle 2 1327 at different positions on the inner wall of the filter mesh cylinder 12 through the upper pipeline 19, the lower pipeline 1316 and the infusion pipe 2 1328, so that the adsorption liquid is evenly attached to the inner wall of the filter mesh cylinder 12, and the waste flue gas is further evenly contacted with the adsorption liquid, and further denitrification treatment of the waste flue gas is achieved, with good denitrification effect and high efficiency. During the denitrification process, the rotating rod 1304 drives the lower connecting rod 1329 to rotate, causing the cleaning brush 2 1331 to slide along the outer wall of the filter mesh cylinder 12, cleaning the solid slag generated during the reaction process, avoiding clogging of the filter mesh cylinder 12, and ensuring the treatment efficiency of the waste flue gas.

[0037] A method for denitrifying waste flue gas from a thermal power plant, using the above-mentioned denitrifying device for waste flue gas from a thermal power plant, comprises the following steps:

[0038] Step 1: The waste flue gas enters the pretreatment box 2 through the flue gas inlet pipe 3, and the water pump 501 is started. The water in the water storage tank 1 is sprayed on the waste flue gas through the spray head 504 to cool the waste flue gas and remove fly ash in the waste flue gas;

[0039] Step 2: The pre-treated waste flue gas is discharged through the flue gas outlet pipe 7 and enters the denitrification tower 8. The second drive motor 1301 is started to rotate the rotating rod 1304, and the liquid outlet pump 18 is turned on to spray the adsorption liquid downward through the atomizing nozzle 1314 to achieve flue gas denitrification treatment;

[0040] Step 3: Start the dual-axis motor 2 1318 and open the atomizing nozzle 2 1327. The adsorption liquid is sprayed onto the inner wall of the filter cylinder 12 through the atomizing nozzle 2 1327. After preliminary denitrification treatment, the waste flue gas enters the filter cylinder 12 and further contacts with the adsorption liquid to achieve further denitrification treatment. The treated waste flue gas is discharged through the chimney 14.

[0041] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A waste flue gas denitrification device for a thermal power plant, comprising a water storage tank (1), characterized in that: A pretreatment box (2) is fixedly mounted on the top surface of the water storage tank (1), one end of the pretreatment box (2) is fixedly connected to a smoke inlet pipe (3), and a dust reduction cooling assembly (5) is provided inside the pretreatment box (2), one end of the pretreatment box (2) away from the smoke inlet pipe (3) is fixedly connected to a smoke outlet pipe (7), one end of the smoke outlet pipe (7) away from the pretreatment box (2) is fixedly connected to a denitration tower (8), a filter plate (9) is fixedly connected to the bottom of the denitration tower (8), and a support rod (10) is fixedly connected to the top surface of the filter plate (9) The top surface of the support rod (10) is fixedly connected to a guide plate (11), the inner wall of the denitrification tower (8) is fixedly connected to a filter screen cylinder (12), the filter screen cylinder (12) is arranged above the guide plate (11), and a flue gas denitrification component (13) is arranged inside the filter screen cylinder (12), the flue gas denitrification component (13) includes a second drive motor (1301), the second drive motor (1301) is fixedly connected to one end of the top surface of the filter screen cylinder (12), and a chimney (14) is fixedly installed on the top surface of the denitrification tower (8); The dust reduction cooling assembly (5) comprises a water pump (501), the water pump (501) is fixedly connected to the outer wall of the water storage tank (1), and the input end of the water pump (501) is fixedly connected to the water outlet of the water storage tank (1) through a pipeline, the output end of the water pump (501) is fixedly connected to a water delivery pipe (502), one end of the water delivery pipe (502) away from the water pump (501) is fixedly connected to a spray seat (503), the output end of the spray seat (503) is fixedly connected to a spray head (504), the spray head (504) is arranged inside the pretreatment box (2), a filter screen (505) is fixedly installed on the inner wall of the bottom surface of the pretreatment box (2), and sewage discharge doors (6) are installed on both sides of the outer wall of the pretreatment box (2), and the sewage discharge doors (6) are arranged at both ends of the filter screen (505); The outer wall of the pretreatment box (2) is fixedly connected to the sealing box (4), and a double-axis motor (506) is fixedly installed in the middle of the inner wall of the sealing box (4). The two output shafts of the double-axis motor (506) are both connected to the screw rod (507) through a coupling transmission, and the surface of the screw rod (507) is threadedly connected to the movable seat (508). The interior of the sealing box (4) is fixedly connected to the guide rod (509), and the movable seat (508) is slidably arranged on the surface of the guide rod (509); The outer wall of the movable seat (508) is fixedly connected to a movable frame (510), the bottom surface of the movable frame (510) is fixedly connected to a plurality of elastic rods (511), the bottom ends of the elastic rods (511) are fixedly connected to a cleaning brush (512), the cleaning brush (512) is slidably arranged on the top surface of the filter screen (505), the interior of the movable frame (510) is movably provided with a rack (513), the surface of the rack (513) is meshed with a toothless gear (514), the outer wall of the movable frame (510) is fixedly connected to a fixed plate (515), the outer wall of the fixed plate (515) is fixedly connected to a driving motor (516), and the power output shaft of the driving motor (516) is transmission-connected to the toothless gear (514) via a coupling; The power output shaft of the driving motor 2 (1301) is connected to the gear 1 (1302) through a coupling transmission, the surface of the gear 1 (1302) is meshed with the gear 2 (1303), the gear 2 (1303) is rotatably arranged in the middle of the inner wall of the top surface of the denitrification tower (8), and the bottom surface of the gear 2 (1303) is fixedly connected to the rotating rod (1304), and the outer wall of the rotating rod (1304) is fixedly connected to the centrifugal fan blade (1305); The bottom outer wall of the rotating rod (1304) is fixedly connected to two symmetrically arranged mounting brackets (1306), and a gear (1307) is rotatably arranged at one end of the mounting bracket (1306) away from the rotating rod (1304). The bottom inner wall of the filter screen cylinder (12) is fixedly connected to an annular rack (1308), and the gear (1307) is meshed with the annular rack (1308). The top surface of the gear (1307) is fixedly connected to a rotating disk (1309), and one end of the top surface of the rotating disk (1309) is fixedly connected to the rotating disk (1309). An eccentric rod (1310) is fixedly connected, a steering plate (1311) is rotatably provided on the surface of the eccentric rod (1310), a movable seat 2 (1312) is slidably provided inside the mounting frame (1306), a fixed rod (1313) is fixedly connected to the top surface of the movable seat 2 (1312), an end of the steering plate (1311) away from the eccentric rod (1310) is rotatably provided on the surface of the fixed rod (1313), and an atomizing nozzle 1 (1314) is fixedly connected to the bottom surface of the output end of the movable seat 2 (1312).

2. The waste flue gas denitrification device for thermal power plants according to claim 1, characterized in that: The outer wall of the water storage tank (1) away from the smoke inlet pipe (3) is fixedly connected to a bracket three (15), the outer wall of the bracket three (15) is fixedly connected to a bracket four (16), the bracket four (16) is fixedly connected to the outer wall of the denitrification tower (8), the bottom surface of the bracket three (15) is fixedly installed with an adsorption liquid tank (17), and the bottom surface of the bracket three (15) is fixedly installed with a liquid outlet pump (18), the input end of the liquid outlet pump (18) is fixedly connected to the liquid outlet of the bracket three (15) through a pipeline, and the liquid outlet pump (18) The output end of the upper pipe (19) is fixedly connected, and one end of the upper pipe (19) away from the liquid outlet pump (18) is rotatably connected to a rotary joint (1317). The rotary joint (1317) is rotatably arranged on the top of the filter screen cylinder (12). The interior of the rotary joint (1317) is fixedly connected to the lower pipe (1316). The outer wall of the lower pipe (1316) is fixedly connected to the first infusion pipe (1315). The first infusion pipe (1315) is fixedly connected to the input end surface of the second movable seat (1312).

3. The waste flue gas denitrification device for thermal power plants according to claim 2, characterized in that: The interior of the rotating rod (1304) is fixedly connected to the second dual-axis motor (1318), and the outer wall of the rotating rod (1304) is fixedly connected to the first bracket (1319). The two power output shafts of the second dual-axis motor (1318) are fixedly connected to the output rod (1320) through a coupling. The surface of the output rod (1320) is provided with an eccentric plate (1321) for rotation. The eccentric plate (1321) is provided with an eccentric rotating rod (1322) for rotation and sliding at one end away from the output rod (1320). The eccentric rotating rod (1322) is provided with a connecting rod (1323) for sliding at one end away from the eccentric plate (1321). Both ends of the connecting rod (1323) are fixedly connected to the connecting plate (1324). The first bracket (1304) is provided with a connecting rod (1324). The outer wall of the second connecting rod (1319) is fixedly connected to a fixing seat (1326) at both ends, and the end of the fixing seat (1326) away from the bracket (1319) is fixedly connected to the second connecting rod (1325). The end of the connecting plate (1324) away from the first connecting rod (1323) is rotatably arranged on the surface of the second connecting rod (1325). The outer wall of the second connecting rod (1325) is fixedly connected to the second atomizing nozzle (1327). The output direction of the second atomizing nozzle (1327) is toward the side of the filter cylinder (12). The input end of the second atomizing nozzle (1327) is fixedly connected to the second infusion pipe (1328). The end of the second infusion pipe (1328) away from the second atomizing nozzle (1327) is fixedly connected to the surface of the lower pipeline (1316).

4. The waste flue gas denitrification device for thermal power plants according to claim 3, characterized in that: The bottom surface of the rotating rod (1304) is fixedly connected to a lower connecting rod (1329), and the outer walls on both sides of the bottom of the lower connecting rod (1329) are fixedly connected to bracket 2 (1330), and the outer walls on the sides close to each other of the two brackets 2 (1330) are fixedly connected to a spring, and the end of the spring away from the bracket 2 (1330) is fixedly connected to a cleaning brush 2 (1331), and the cleaning brush 2 (1331) is slidably set on the outer wall of the filter cylinder (12).

5. A method for denitrifying waste flue gas from a thermal power plant, using the device for denitrifying waste flue gas from a thermal power plant as claimed in claim 4, characterized in that: The steps include: Step 1: The waste flue gas enters the pretreatment box (2) through the flue gas inlet pipe (3), the water pump (501) is started, and the water in the water storage tank (1) is sprayed on the waste flue gas through the spray head (504), thereby cooling the waste flue gas and removing fly ash from the waste flue gas; Step 2: The pre-treated waste flue gas is discharged through the flue gas outlet pipe (7) and enters the denitrification tower (8). The second drive motor (1301) is started to rotate the rotating rod (1304), and the liquid outlet pump (18) is turned on to spray the adsorption liquid downward through the atomizing nozzle (1314) to achieve flue gas denitrification treatment. Step 3: Start the second dual-axis motor (1318) and open the second atomizing nozzle (1327), spraying the adsorption liquid onto the inner wall of the filter cylinder (12) through the second atomizing nozzle (1327). After preliminary denitrification treatment, the waste flue gas enters the filter cylinder (12) and further contacts with the adsorption liquid to achieve further denitrification treatment. The treated waste flue gas is discharged through the chimney (14).

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