Waste flue gas denitration device and method for thermal power plant

Abstract

The invention discloses a waste flue gas denitration device and method for a thermal power plant, and relates to the technical field of waste gas treatment.The waste flue gas denitration device comprises a water storage tank, a dust falling and cooling assembly is arranged in a pretreatment box, a filter plate is fixedly connected to the bottom of a denitration tower, a flow guide plate is fixedly connected to the top face of a supporting rod, and a filter screen cylinder is arranged above the flow guide plate; a flue gas denitration assembly is arranged in the filter screen cylinder and comprises a driving motor II, the driving motor II is fixedly connected to one end of the top surface of the filter screen cylinder, and a chimney is fixedly mounted on the top surface of the denitration tower. According to the waste flue gas denitration device and method for the thermal power plant, high-temperature waste flue gas is cooled, meanwhile, fly ash in the waste flue gas is removed, the fly ash is prevented from entering the denitration tower to cause blockage, the waste flue gas is subjected to multi-stage denitration treatment by spraying the adsorption liquid, the waste flue gas and the adsorption liquid are fully contacted and reacted, and the denitration efficiency is improved. The denitration effect is good, and the efficiency is high.

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, referred to as thermal power plants, are factories that use combustibles as fuel to produce electricity. When boilers burn pulverized coal for energy conversion, they also emit a large amount of pollutants into the environment. According to statistics, 67% of atmospheric NOx emissions come from coal burning. The emission of nitrogen oxides (NO, NO2, referred to as NOx) is 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 thermal power plants, a large amount of harmful flue gas will be generated by the combustion of combustibles. The existing flue gas denitrification devices mainly use the denitrification spray method. During the spray denitrification process, there is insufficient contact between the flue gas and the adsorption liquid. Denitrification only relies on a single spraying method, which will result in uneven spraying, directly affecting the denitrification effect and low denitrification efficiency. Summary of the invention

[0004] The invention discloses a waste flue gas denitration device and method for a thermal power plant, aiming to solve the problem that in the process of spray denitration, there is insufficient contact between flue gas and adsorption liquid, and denitration only by a single spraying method has the phenomenon of uneven spraying, which directly affects the denitration effect and the technical problem of low denitration 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 comprises a water storage tank, a pretreatment box is fixedly installed on the top surface of the water storage tank, one end of the pretreatment box is fixedly connected to a smoke inlet pipe, and a dust reduction cooling component is arranged inside the pretreatment box, one end of the pretreatment box away from the smoke inlet pipe is fixedly connected to a smoke outlet pipe, and one 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 screen cylinder is fixedly connected to the inner wall of the denitrification tower, the filter screen cylinder is arranged above the guide plate, and a flue gas denitrification component is arranged inside the filter screen cylinder, the flue gas denitrification component comprises two drive motors, the two drive motors are fixedly connected to one end of the top surface of the filter screen cylinder, and a chimney is fixedly installed on the top surface of the denitrification tower.

[0007] By arranging a water storage tank, a pretreatment box, 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, and then the adsorption liquid is sprayed downward through the flue gas denitrification component to achieve flue gas denitrification treatment, and at the same time, the adsorption liquid is sprayed on the inner wall of the filter mesh cylinder. After the preliminary denitrification treatment, the waste flue gas enters the filter mesh cylinder and further contacts with the adsorption liquid to achieve 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 in the middle of the inner wall of the sealing box, and a dual-axis motor 1 The two output shafts are connected to the screw rod through a coupling transmission, the surface of the screw rod is threadedly connected to a moving seat 1, the inside of the sealing box is fixedly connected to a 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 a moving frame, the bottom surface of the moving frame is fixedly connected to a plurality of elastic rods, the bottom end of the elastic rod is fixedly connected to a cleaning brush 1, and the cleaning brush 1 is slidably arranged on the top surface of the filter screen plate, and a rack is movably arranged inside the moving frame, and a toothless gear is meshed on the surface of the rack, the outer wall of the moving frame is fixedly connected to a fixed plate, and the outer wall of the fixed plate is fixedly connected to a driving motor 1, and the power output shaft of the driving motor 1 is transmission-connected to the toothless gear through a 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 screen and then re-enters the water storage tank, thereby realizing the recycling of water and improving the utilization efficiency of water resources. The water pipe is started to clean the ash on the filter screen to avoid clogging of the filter screen.

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

[0011] By arranging the flue gas denitrification component, the third bracket, the fourth bracket, the adsorption liquid tank, the liquid outlet pump and the upper pipeline, the driving motor 2 is started, the moving seat 2 slides back and forth along the inside of the mounting frame, and the mounting frame drives the atomizing nozzle 1 to rotate together, the liquid outlet pump is started and the atomizing nozzle 1 is opened, so that the adsorption liquid in the adsorption liquid tank is sprayed downward by the atomizing nozzle 1, the adsorption liquid is evenly contacted with the waste flue gas, and the denitration treatment of the waste flue gas is realized, the double-axis motor 2 is started, the atomizing nozzle 2 is reciprocated up and down, the atomizing nozzle 2 is opened, and the adsorption liquid in the adsorption liquid tank is sprayed by the atomizing nozzle 2 on different positions of the inner wall of the filter mesh cylinder, so that the adsorption liquid is evenly attached to the inner wall of the filter mesh cylinder, the waste flue gas is further evenly contacted with the adsorption liquid, and further denitration treatment of the waste flue gas is realized, and the denitration effect is good and the efficiency is high.

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

[0013] Step 1: The waste flue gas enters the pretreatment box 2 through the smoke 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 denitration 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 denitration treatment;

[0015] Step three, start the dual-axis motor 1318 and open the atomizing nozzle 1327, spray the adsorption liquid onto the inner wall of the filter cylinder 12 through the atomizing nozzle 1327, after the preliminary denitrification treatment, the waste flue gas enters the filter cylinder 12 and further contacts with the adsorption liquid to achieve further denitrification treatment, and 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 The present invention is a schematic diagram of the overall structure of a waste flue gas denitrification device for a thermal power plant.

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

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

[0020] Figure 4 The present invention provides a side view of the structure of a cleaning brush for a waste flue gas denitration device for a thermal power plant.

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

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

[0023] Figure 7 The present invention is a side structural cross-sectional view of a rotating rod of a waste flue gas denitration device for a thermal power plant.

[0024] Figure 8 The present invention provides a side view of the structure of an annular rack of a waste flue gas denitration device for a thermal power plant.

[0025] In the figure: 1, water storage tank; 2, pretreatment box; 3, smoke inlet pipe; 4, sealing box; 5, dust reduction cooling assembly; 501, water pump; 502, water pipe; 503, spray seat; 504, spray head; 505, filter screen; 506, double-axis motor 1; 507, screw rod; 508, moving seat 1; 509, guide rod; 510, moving frame; 511, elastic rod; 512, cleaning brush 1; 513, gear strip; 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 screen cylinder; 13, flue gas denitration assembly; 1301, drive motor 2; 1302, gear 1; 1303, gear 2; 1304, rotating rod; 1305, centrifugal fan blade; 1306, mounting frame;

[0026] 1307, gear three; 1308, annular 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. Rotating 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 described clearly and completely 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, and denitrification only relying on a single spraying method has the phenomenon of uneven spraying, which directly affects the denitrification effect and leads to low denitrification efficiency.

[0030] Reference Figure 1-Figure 8 A waste flue gas denitrification device for a thermal power plant comprises 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, 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 denitrification tower 8, a filter plate 9 is fixedly connected to the bottom of the denitrification tower 8, a support rod 10 is fixedly connected to the top surface of the filter plate 9, a guide plate 11 is fixedly connected to the top surface of the support rod 10, a filter screen cylinder 12 is fixedly connected to the inner wall of the denitrification tower 8, 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 comprises a driving motor 2 1301, the driving motor 2 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.

[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 to achieve multi-stage denitrification treatment of the waste flue gas, 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.

[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, and the spray head 504 is arranged inside the pretreatment box 2, and a filter screen plate 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 the outer walls of both sides of the pretreatment box 2, and the sewage discharge doors 6 are arranged at both ends of the filter screen plate 505; the outer wall of the pretreatment box 2 is fixedly connected to a sealing box 4, and a dual-axis motor 506 is fixedly installed in the middle of the inner wall of the sealing box 4, and the two output shafts of the dual-axis motor 506 are both connected. A screw rod 507 is connected through a coupling transmission, and a movable seat 508 is threadedly connected to the surface of the screw rod 507. A guide rod 509 is fixedly connected to the inside of the sealing box 4, and the movable seat 508 is slidably set on the surface of the guide rod 509; the outer wall of the movable seat 508 is fixedly connected to a movable frame 510, and a plurality of elastic rods 511 are fixedly connected to the bottom surface of the movable frame 510. The bottom end of the elastic rod 511 is fixedly connected to a cleaning brush 512, and the cleaning brush 512 is slidably set on the top surface of the filter screen plate 505. A rack 513 is movably arranged inside the movable frame 510, and a toothless gear 514 is meshed on the surface of the rack 513. 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 driving motor 516, and the power output shaft of the driving motor 516 is transmission-connected to 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 through the water pipe 502 and the spray seat 503 by the spray head 504, so as to cool the waste flue gas and remove the fly ash in the waste flue gas. The water after spraying is filtered by the filter screen 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, so as to drive 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 screen 505, so as to clean the filter screen 505. The ash can be cleaned by opening the sewage door 6. When the cleaning brush 512 slides to the end of the filter screen plate 505, the dual-axis motor 506 is started to rotate the toothless gear 514, and the toothless gear 514 is meshed with the rack 513, so that the rack 513 drives the cleaning brush 512 to move upward to the highest position, and the dual-axis motor 506 is reversely driven to make the cleaning brush 512 return to the upper end of the initial position, and then continue to drive the driving motor 516 to make the teeth on the toothless gear 514 disengage from the rack 513, so that the cleaning brush 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 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 frames 1306, and the mounting frames 130 The end away from the rotating rod 1304 is rotatably provided with a gear 3 1307, the bottom inner wall of the filter screen cylinder 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 rotatably provided with a steering plate 1311, the interior of the mounting frame 1306 is slidably provided with a moving seat 2 1312, the top surface of the moving seat 2 1312 is fixedly connected with the rotating disk 1309, and the rotating disk 1309 is fixedly connected with an eccentric rod 1310. A fixed rod 1313 is fixedly connected, one end of the steering plate 1311 away from the eccentric rod 1310 is rotatably arranged on the surface of the fixed rod 1313, and the bottom surface of the output end of the movable seat 2 1312 is fixedly connected to an atomizing nozzle 1314; the outer wall of the water storage tank 1 away from the smoke inlet pipe 3 is fixedly connected to a bracket 3 15, the outer wall of the bracket 3 15 is fixedly connected to a 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 an adsorption liquid tank 17, and the bottom surface of the bracket 3 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 3 15 through a pipeline, and the output end of the liquid outlet pump 18 is fixedly connected to the upper pipeline 19. The end of the upper pipeline 19 away from the liquid outlet pump 18 is rotatably connected to a 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 a dual-axis motor 1318, and the outer wall of the rotating rod 1304 is fixedly connected to a bracket 1319, the two power output shafts of the dual-axis motor 1318 are fixedly connected to an output rod 1320 through a coupling, an eccentric plate 1321 is rotatably provided on the surface of the output rod 1320, an eccentric rotating rod 1322 is rotatably and slidably provided on the end of the eccentric plate 1321 away from the output rod 1320, a connecting rod 1323 is slidably provided on the end of the eccentric rotating rod 1322 away from the eccentric plate 1321, both ends of the connecting rod 1323 are fixedly connected to connecting plates 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 a connecting rod 2 1325, and the connecting plate 1324 is away from the connecting rod One end of the shaft rod 1323 is rotatably arranged on the surface of the second connecting rod 1325, and the outer wall of the second connecting rod 1325 is fixedly connected with the second atomizing nozzle 1327, the output direction of the second atomizing nozzle 1327 is toward the side of the filter screen cylinder 12, and the input end of the second atomizing nozzle 1327 is fixedly connected with the second infusion tube 1328, and the end of the second infusion tube 1328 away from the second atomizing nozzle 1327 is fixedly connected to the surface of the lower pipeline 1316; the bottom surface of the rotating rod 1304 is fixedly connected with the lower connecting rod 1329, and the outer walls on both sides of the bottom of the lower connecting rod 1329 are fixedly connected with the second bracket 1330, and the outer walls of the two brackets 1330 on the side close to each other are fixedly connected with a spring, and the end of the spring away from the second bracket 1330 is fixedly connected with the second cleaning brush 1331, and the second cleaning brush 1331 is slidably arranged on the outer wall of the filter screen cylinder 12.;

[0036] Specifically, after the flue gas is pre-treated, it enters the denitrification tower 8 through 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 meshed 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 moving seat 2 1312 moves along the mounting frame 1 The interior of 306 reciprocates, and 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 finally sprayed downward from the atomizing nozzle 1314 through the upper pipeline 19, the lower pipeline 1316 and the infusion pipe 1315, and the adsorption liquid is evenly contacted with the waste flue gas to achieve denitration treatment of the waste flue gas, and at the same time, the double-axis motor 2 1318 is started, and the double-axis motor 2 1318 drives the output rod 1320 to rotate, so that the eccentric plate 1321 slides along the surface of the eccentric rotating rod 1322, and at the same time, the connecting plate 1324 drives the atomizing nozzle 1327 to change its angle, and the atomizing nozzle 1327 reciprocates up and down, and the atomizing nozzle 1327 is opened. The adsorption liquid in the adsorption liquid tank 17 is sprayed on different positions of the inner wall of the filter mesh cylinder 12 by the atomizing nozzle 1327 through the upper pipeline 19, the lower pipeline 1316 and the second infusion pipe 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, so that the cleaning brush 1331 slides along the outer wall of the filter mesh cylinder 12, and the solid slag generated during the reaction process is cleaned to avoid clogging of the filter mesh cylinder 12 and ensure the treatment efficiency of the waste flue gas.

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

[0038] Step 1: The waste flue gas enters the pretreatment box 2 through the smoke 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 denitration 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 denitration treatment;

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

[0041] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope 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 arranged 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) comprises 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 smoke outlet chimney (14) is fixedly installed on the top surface of the denitrification tower (8).

2. The waste flue gas denitrification device for thermal power plants according to claim 1, characterized in that: 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 pipe (502), one end of the water 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 plate (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 plate (505).

3. A waste flue gas denitrification device for a thermal power plant according to claim 2, characterized in that: The outer wall of the pretreatment box (2) is fixedly connected to a sealing box (4), a dual-axis motor (506) is fixedly installed in the middle of the inner wall of the sealing box (4), the two output shafts of the dual-axis motor (506) are both connected to a screw rod (507) through a coupling transmission, the surface of the screw rod (507) is threadedly connected to a movable seat (508), the interior of the sealing box (4) is fixedly connected to a guide rod (509), and the movable seat (508) is slidably arranged on the surface of the guide rod (509).

4. The waste flue gas denitrification device for thermal power plants according to claim 3, characterized in that: 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 plate (505), a rack (513) is movably arranged inside the movable frame (510), 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.

5. The waste flue gas denitrification device for thermal power plants according to claim 4, characterized in that: 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).

6. The waste flue gas denitrification device for thermal power plants according to claim 5, characterized in that: The bottom outer wall of the rotating rod (1304) is fixedly connected to two symmetrically arranged mounting brackets (1306); one end of the mounting bracket (1306) away from the rotating rod (1304) is rotatably provided with a gear three (1307); the bottom inner wall of the filter screen cylinder (12) is fixedly connected to an annular rack (1308); the gear three (1307) meshes with the annular rack (1308); the top surface of the gear three (1307) is fixedly connected to a rotating disk (1309); 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).

7. The waste flue gas denitrification device for thermal power plants according to claim 6, characterized in that: The outer wall of the water storage tank (1) on one side 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 denitration 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 pipeline (19) is fixedly connected, and one end of the upper pipeline (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 a lower pipeline (1316), the outer wall of the lower pipeline (1316) is fixedly connected to an infusion tube 1 (1315), and the infusion tube 1 (1315) is fixedly connected to the input end surface of the movable seat 2 (1312).

8. The waste flue gas denitrification device for thermal power plants according to claim 7, characterized in that: The interior of the rotating rod (1304) is fixedly connected to a dual-axis motor 2 (1318), and the outer wall of the rotating rod (1304) is fixedly connected to a bracket 1 (1319). The two power output shafts of the dual-axis motor 2 (1318) are fixedly connected to an output rod (1320) through a coupling. An eccentric plate (1321) is rotatably provided on the surface of the output rod (1320). An eccentric rotating rod (1322) is rotatably and slidably provided at one end of the eccentric plate (1321) away from the output rod (1320). A coupling rod 1 (1323) is slidably provided at one end of the eccentric rotating rod (1322) away from the eccentric plate (1321). Both ends of the coupling rod 1 (1323) are fixedly connected to coupling plates (1324). The bracket 1 (1319) is fixedly connected to the output rod (1320) through a coupling. The two ends of the outer wall of the support frame 1 (1319) are fixedly connected with a fixing seat (1326), one end of the fixing seat (1326) away from the bracket 1 (1319) is fixedly connected with a second connecting rod (1325), one 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), and the outer wall of the second connecting rod (1325) is fixedly connected with a second atomizing nozzle (1327), the output direction of the second atomizing nozzle (1327) is toward the side of the filter screen cylinder (12), the input end of the second atomizing nozzle (1327) is fixedly connected with a second infusion tube (1328), and one end of the second infusion tube (1328) away from the second atomizing nozzle (1327) is fixedly connected to the surface of the lower pipeline (1316).

9. The waste flue gas denitrification device for thermal power plants according to claim 8, 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 brackets 2 (1330), and the outer walls on the sides close to each other of the two brackets 2 (1330) are fixedly connected to springs, 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 arranged on the outer wall of the filter screen cylinder (12).

10. A method for denitrifying waste flue gas for a thermal power plant, using the device for denitrifying waste flue gas for a thermal power plant as claimed in claim 9, characterized in that: The steps include: Step 1: 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 sprayed on the waste flue gas through the spray head (504), so as to cool the waste flue gas and remove fly ash in the waste flue gas; Step 2: the pre-treated waste flue gas is discharged through the flue gas outlet pipe (7) and enters the denitration tower (8), the second drive motor (1301) is started to rotate the rotating rod (1304), the liquid outlet pump (18) is turned on, and the adsorption liquid is sprayed downward through the atomizing nozzle (1314) to achieve flue gas denitration treatment; Step 3, start the second dual-axis motor (1318) and open the second atomizing nozzle (1327), spray the adsorption liquid onto the inner wall of the filter screen cylinder (12) through the second atomizing nozzle (1327), after the preliminary denitrification treatment, the waste flue gas enters the filter screen cylinder (12) and further contacts with the adsorption liquid to achieve further denitrification treatment, and the treated waste flue gas is discharged through the chimney (14).

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