Ozone flue gas denitration device and denitration method thereof

Abstract

The invention provides an ozone flue gas denitration device and a denitration method thereof, and belongs to the technical field of flue gas denitration. The ozone flue gas denitration device comprises a denitration tank, a gas inlet pipe and an exhaust pipe, the gas inlet pipe and the exhaust pipe are installed on the side wall of the denitration tank, a pretreatment mechanism is installed in the denitration tank, and the pretreatment mechanism comprises a spray pipe, a filter plate and a rotating seat. By arranging the pretreatment mechanism, an alkaline solution can be injected into a spray pipe through a water pump and is sprayed into flue gas through a spray head, particle impurities in the flue gas are removed, acid gas such as sulfur dioxide in the flue gas can be effectively removed, the flue gas is humidified, favorable conditions are provided for a subsequent ozone reaction, and in the spraying process, the treatment efficiency is improved. The temperature of the flue gas is reduced while the humidity is increased, so that the reaction efficiency of ozone is improved, then a rotating seat and a scraper blade are driven by a first rotating shaft to rotate, and under the action of centrifugal force, particle impurities attached to the surface of a filter plate are thrown into a collecting bin to be collected, so that the device is convenient to use.

Description

Technical Field

[0001] The present invention relates to the technical field of flue gas denitration, and in particular, to an ozone flue gas denitration device and a denitration method thereof. Background Art

[0002] Denitration refers to the removal of nitrogen oxides from the flue gas emitted by industries. Nitrogen oxides are one of the important causes of air pollution and acid rain. When nitrogen oxides react with substances such as water vapor and oxygen in the atmosphere, acid rain will be formed, resulting in soil acidification and water source pollution, seriously affecting the ecological environment and posing a threat to human health. Nitrogen oxides can cause respiratory diseases, especially diseases such as asthma and chronic bronchitis. Therefore, reducing nitrogen oxides in flue gas is of great significance to public health.

[0003] By injecting ozone into the flue gas, nitrogen oxides react with ozone to generate nitrogen dioxide, which is further decomposed into harmless nitrogen and oxygen by oxygen, thereby realizing the denitration of flue gas. However, in existing ozone flue gas denitration devices, ozone is usually directly injected into the flue gas. The high temperature of the flue gas and the solid particles contained therein will affect the reaction efficiency and reduce the denitration effect of the flue gas. Summary of the Invention

[0004] To make up for the above deficiencies, the present invention provides an ozone flue gas denitration device and a denitration method thereof that overcome the above technical problems or at least partially solve the above problems.

[0005] The present invention is implemented as follows: The present invention provides an ozone flue gas denitration device, including a denitration tank, an inlet pipe, and an exhaust pipe. The inlet pipe and the exhaust pipe are installed on the side wall of the denitration tank. A pretreatment mechanism is installed in the denitration tank for preprocessing the flue gas. The pretreatment mechanism includes: A spray pipe installed in the inner cavity of the denitration tank, and a plurality of nozzles are installed on the surface of the spray pipe for spraying the flue gas; A filter plate installed in the inner cavity of the denitration tank for filtering particulate impurities in the spray liquid; A rotating seat rotatably installed on the surface of the filter plate, and a scraping plate is fixedly installed on the side wall of the rotating seat; A replenishing mechanism is installed in the inner cavity of the denitration tank for replenishing the solvent in the spray liquid. The replenishing mechanism includes a solvent tank and a replenishing hole. The solvent tank is fixedly installed on the side wall of the denitration tank for storing the solvent. A replenishing hole is provided on the side wall of the denitration tank, and a water pipe is connected between the solvent tank and the replenishing hole.

[0006] In a preferred embodiment, a water pump is installed on the side wall of the denitration tank. A water pipe is connected between the water inlet end of the water pump and the inner cavity of the denitration tank, and a water pipe is connected between the water outlet end of the water pump and the spray pipe. A drain pipe is installed on the side wall of the denitration tank.

[0007] In a preferred embodiment, the scraper is in contact with the surface of the filter plate for scraping off the particulate impurities adhering to the surface of the filter plate. A collection bin is installed on the side wall of the denitration tank for collecting the particulate impurities. A first rotating shaft is fixedly penetrated through the inner cavity of the rotating seat for driving the scraper to rotate.

[0008] In a preferred embodiment, a sealing plate is slidably installed in the inner cavity of the denitration tank for closing the replenishment hole. A first spring is fixedly installed in the inner cavity of the denitration tank. One end of the first spring is fixedly connected to the denitration tank, and the other end of the first spring is fixedly connected to the sealing plate for driving the sealing plate to move upward.

[0009] In a preferred embodiment, an extrusion plate is fixedly installed on the side wall of the sealing plate. A second rotating shaft is rotatably installed on the side wall of the denitration tank. An eccentric wheel is fixedly installed at one end of the second rotating shaft. The extrusion plate is in contact with the surface of the eccentric wheel. A first motor is fixedly installed on the side wall of the denitration tank. The output end of the first motor is fixedly connected to one end of the second rotating shaft. A PH sensor is installed on the inner wall of the denitration tank for detecting the acidity and alkalinity of the spraying liquid.

[0010] In a preferred embodiment, a sleeve shaft is rotatably installed in the inner cavity of the denitration tank. A third rotating shaft is installed in the inner cavity of the sleeve shaft. A spline groove is formed in the inner cavity of the sleeve shaft. Spline teeth are fixedly installed on the surface of the third rotating shaft. The spline teeth are engaged with the spline groove. A lifting plate is sleeved on the surface of the third rotating shaft. The third rotating shaft is rotatably connected to the lifting plate.

[0011] In a preferred embodiment, a first chuck is fixedly installed on the surface of the third rotating shaft, and a second chuck is fixedly installed at the bottom of the first rotating shaft. The first chuck is adapted to the second chuck. A second spring is fixedly installed in the inner cavity of the denitration tank. The other end of the second spring is fixedly connected to the lifting plate for driving the lifting plate to move downward and abut against the surface of the eccentric wheel. A transverse shaft is fixedly installed on the side wall of the sleeve shaft. A plurality of stirring rods are installed on the surface of the transverse shaft for mixing the solvent into the spraying liquid.

[0012] In a preferred embodiment, a denitration mechanism is installed inside the denitration tank for injecting ozone to denitrate the flue gas. The denitration mechanism includes a fourth rotating shaft and a rotating roller. The fourth rotating shaft is rotatably installed inside the denitration tank. A rotating roller is fixedly installed on the surface of the fourth rotating shaft. A second motor is fixedly installed on the surface of the denitration tank. First gears are fixedly installed on the output end of the second motor and the surface of the fourth rotating shaft respectively. The two first gears are meshed with each other. A gear box is installed inside the denitration tank. Second gears are fixedly installed on the bottom of the fourth rotating shaft and the surface of the first rotating shaft respectively. A third gear is rotatably installed on the inner wall of the gear box. The third gear is meshed with the two second gears respectively to drive the fourth rotating shaft and the first rotating shaft to rotate in opposite directions.

[0013] In a preferred embodiment, a rotating ring is rotatably installed on the surface of the rotating roller. A dispersion blade is fixedly installed on the side wall of the rotating ring for dispersing the flue gas. A plurality of spray holes are formed in the side wall of the rotating roller for spraying ozone. The fourth rotating shaft is hollow. The hollow part of the fourth rotating shaft is communicated with the spray holes. An adjusting ring is slidably installed inside the rotating roller. A plurality of adjusting holes are formed in the side wall of the adjusting ring for adjusting the opening degree of the spray holes. A third spring is installed inside the rotating roller. The other end of the third spring is fixedly connected with the adjusting ring for driving the adjusting ring to move downward. A driving block is fixedly installed on the surface of the rotating ring. The surface of the driving block is wedge-shaped. A fourth spring is fixedly installed inside the rotating roller. The other end of the fourth spring is fixedly connected with the driving block for driving the rotating ring to rotate. An inclined groove is formed in the side wall of the adjusting ring. A flow disturbing rod is fixedly installed on the side wall of the rotating roller for mixing ozone into the flue gas.

[0014] An ozone flue gas denitration method applicable to the above-mentioned ozone flue gas denitration device includes the following steps: S1: Pretreatment; first, an alkaline solution is injected into the denitration tank. The flue gas is injected into the denitration tank through the inlet pipe. The alkaline solution is injected into the spray pipe through the water pump and sprayed into the flue gas by the spray head to spray the flue gas and remove the particulate impurities in the flue gas. Subsequently, the first rotating shaft drives the rotating seat and the scraper to rotate. Under the action of centrifugal force, the particulate impurities attached to the surface of the filter plate are thrown into the collection bin for collection; S2: Supplementary injection of solvent; the pH value of the spraying liquid is monitored in real time by the pH sensor, and a threshold value is preset in advance. When the alkalinity of the spraying liquid is lower than the threshold value, the first motor is started to drive the eccentric wheel to rotate half a turn. Under the action of the first spring, the sealing plate is driven to move upward to cancel the sealing of the supplementary injection hole. Then the solvent in the solvent tank flows into the denitration tank through the supplementary injection hole to realize the adjustment of the alkalinity of the spraying liquid. When the sealing plate moves upward and the solvent is injected, the lifting plate is driven to move upward synchronously by the eccentric wheel, so that the first chuck is engaged with the second chuck. Thus, the first rotating shaft drives the sleeve shaft and the stirring rod to rotate synchronously to mix the solvent into the spraying liquid; S3: Denitrification; drive the rotating roller to rotate by the second motor, generate ozone by the ozone generator, and inject it into the hollow part of the fourth rotating shaft. As the rotating roller rotates, drive the rotating ring and the dispersion blades to rotate synchronously. Then, disperse the flue gas through the dispersion blades, and the flue gas causes resistance to the dispersion blades, making the rotating ring rotate relative to the rotating roller, compressing the fourth spring. Moreover, the greater the flue gas flow rate, the greater the resistance on the dispersion blades, and the greater the compression amount of the fourth spring. Subsequently, drive the adjusting ring to move upward through the driving block, making the adjusting hole communicate with the spraying hole. Then, ozone can be sprayed from the spraying hole into the flue gas. And the greater the resistance on the dispersion blades, the greater the upward movement degree of the adjusting ring, and the greater the coincidence degree between the adjusting hole and the spraying hole, that is, the greater the ozone spraying flow rate, automatically adjusting the ozone flow rate.

[0015] An ozone flue gas denitrification device and its denitrification method provided by the present invention have the following beneficial effects: 1. By setting the pretreatment mechanism, the alkaline solution can be injected into the spray pipe through the water pump and sprayed into the flue gas by the nozzle to spray the flue gas, remove the particulate impurities in the flue gas, and effectively remove acidic gases such as sulfur dioxide in the flue gas, and humidify the flue gas, providing favorable conditions for the subsequent ozone reaction. During the spraying process, the temperature of the flue gas will decrease, and at the same time, the humidity will increase, which helps to improve the reaction efficiency of ozone. Subsequently, drive the rotating seat and the scraper to rotate through the first rotating shaft, and under the action of centrifugal force, throw the particulate impurities attached to the surface of the filter plate into the collection bin for collection, which is convenient for use.

[0016] 2. By setting the supplementary injection mechanism, the pH sensor can be used to monitor the pH value of the spraying liquid in real time, and a threshold is preset. When the alkalinity of the spraying liquid is lower than the threshold, the first motor starts, drives the eccentric wheel to rotate half a circle, and under the action of the first spring, drives the sealing plate to move upward, canceling the sealing of the supplementary injection hole. Then, the solvent in the solvent tank can flow into the denitrification tank through the supplementary injection hole, realizing the adjustment of the alkalinity of the spraying liquid and ensuring the spraying effect. Moreover, when the sealing plate moves upward for solvent filling, the lifting plate is driven to move upward synchronously by the eccentric wheel, making the first chuck engage with the second chuck. Thus, drive the sleeve shaft and the stirring rod to rotate synchronously through the first rotating shaft, mix the solvent into the spraying liquid, and improve the uniformity of the spraying liquid.

[0017] 3. By setting up a denitrification mechanism, the rotating roller is driven to rotate by a second motor, ozone is generated by an ozone generator and injected into the hollow part of the fourth rotating shaft. As the rotating roller rotates, the rotating ring and the dispersing blades rotate synchronously. Then, the flue gas is dispersed by the dispersing blades, and the flue gas can cause resistance to the dispersing blades, causing the rotating ring to rotate relative to the rotating roller, compressing the fourth spring. Moreover, the greater the flue gas flow rate, the greater the resistance on the dispersing blades, and the greater the compression amount of the fourth spring. Subsequently, the driving block pushes the adjusting ring upward, making the adjusting hole communicate with the spraying hole, so that ozone can be sprayed into the flue gas from the spraying hole. And the greater the resistance on the dispersing blades, the greater the upward movement degree of the adjusting ring, and the greater the coincidence degree between the adjusting hole and the spraying hole, that is, the greater the ozone spraying flow rate, realizing the automatic adjustment of the ozone flow rate, which is convenient for use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts. Figure 1 is the front perspective view provided by the embodiment of the present invention; Figure 2 is the side perspective view provided by the embodiment of the present invention; Figure 3 is the front sectional view provided by the embodiment of the present invention; Figure 4 is the side sectional view provided by the embodiment of the present invention; Figure 5 is provided by the embodiment of the present invention Figure 4 enlarged view of part A; <s Figure 6 is provided by the embodiment of the present invention Figure 4 enlarged view of part B; Figure 7 is the sectional view of the rotating roller provided by the embodiment of the present invention; Figure 8 is provided by the embodiment of the present invention Figure 7 enlarged view of part C; Figure 9 is the perspective view of the rotating ring provided by the embodiment of the present invention.

[0019] In the figure: 1, denitration tank; 2, intake pipe; 3, exhaust pipe; 4, pretreatment mechanism; 401, spray pipe; 402, spray head; 403, water pump; 404, drain pipe; 405, filter plate; 406, rotating seat; 407, scraper; 408, collection bin; 409, first rotating shaft; 5, replenishment mechanism; 501, solvent tank; 502, replenishment hole; 503, sealing plate; 504, first spring; 505, extrusion plate; 506, second rotating shaft; 507, eccentric wheel; 508, first motor; 509, PH sensor; 510, sleeve shaft; 511, third rotating shaft; 512, spline groove; 513, spline teeth; 514, lifting plate; 515, first chuck; 516, second chuck; 517, second spring; 518, horizontal shaft; 519, stirring rod; 6, denitration mechanism; 601, fourth rotating shaft; 602, roller; 603, second motor; 604, first gear; 605, gear box; 606, second gear; 607, third gear; 608, rotating ring; 609, dispersion blade; 610, spray hole; 611, adjusting ring; 612, adjusting hole; 613, third spring; 614, driving block; 615, fourth spring; 616, inclined groove; 617, spoiler rod. Specific embodiments

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0021] Refer to Figures 1-9As shown in the figure, the present invention provides a technical solution: an ozone flue gas denitrification device, which includes a denitrification tank 1, an air inlet pipe 2 and an exhaust pipe 3. The air inlet pipe 2 and the exhaust pipe 3 are installed on the side wall of the denitrification tank 1 and are used for air intake and exhaust respectively. A pretreatment mechanism 4 is installed in the denitrification tank 1 for pretreating the flue gas. The pretreatment mechanism 4 includes a spray pipe 401, a filter plate 405 and a rotating seat 406. The spray pipe 401 is installed in the inner cavity of the denitrification tank 1, and a number of spray nozzles 402 are installed on the surface of the spray pipe 401 for spraying the flue gas. A water pump 403 is installed on the side wall of the denitrification tank 1. The water inlet end of the water pump 403 is connected to the inner cavity of the denitrification tank 1 by a water pipe, and the water outlet end of the water pump 403 is connected to the spray pipe 401 by a water pipe. A drain pipe 404 is installed on the side wall of the denitrification tank 1. During use, first inject an alkaline solution into the denitrification tank 1, inject the flue gas into the denitrification tank 1 through the air inlet pipe 2, inject the alkaline solution into the spray pipe 401 through the water pump 403, and spray it into the flue gas by the spray nozzles 402 to spray the flue gas, remove the particulate impurities in the flue gas, and can effectively remove acidic gases such as sulfur dioxide in the flue gas, and humidify the flue gas, providing favorable conditions for the subsequent ozone reaction. During the spraying process, the temperature of the flue gas will decrease and the humidity will increase at the same time, which helps to improve the reaction efficiency of ozone.

[0022] Referring to Figures 1-4 As shown in the figure, in a preferred embodiment, the filter plate 405 is installed in the inner cavity of the denitrification tank 1 for filtering the particulate impurities in the spraying liquid. The rotating seat 406 is rotatably installed on the surface of the filter plate 405. A scraping plate 407 is fixedly installed on the side wall of the rotating seat 406. The scraping plate 407 is in contact with the surface of the filter plate 405 for scraping the particulate impurities attached to the surface of the filter plate 405. A collection bin 408 is installed on the side wall of the denitrification tank 1 for collecting the particulate impurities. A first rotating shaft 409 is fixedly penetrated through the inner cavity of the rotating seat 406 for driving the scraping plate 407 to rotate. By spraying the flue gas, the particulate impurities in the flue gas fall on the surface of the filter plate 405. Subsequently, the first rotating shaft 409 drives the rotating seat 406 and the scraping plate 407 to rotate. Under the action of centrifugal force, the particulate impurities attached to the surface of the filter plate 405 are thrown into the collection bin 408 for collection, which is convenient for use.

[0023] In a preferred embodiment, during use, an alkaline solution is first injected into the denitration tank 1, and flue gas is injected into the denitration tank 1 through the intake pipe 2. The alkaline solution can be injected into the spray pipe 401 by the water pump 403 and sprayed into the flue gas by the spray head 402 to spray the flue gas, remove particulate impurities in the flue gas, and effectively remove acidic gases such as sulfur dioxide in the flue gas, and humidify the flue gas, providing favorable conditions for the subsequent ozone reaction. During the spraying process, the temperature of the flue gas will decrease and the humidity will increase, which helps to improve the reaction efficiency of ozone. Subsequently, the first rotating shaft 409 drives the rotating seat 406 and the scraper 407 to rotate. Under the action of centrifugal force, the particulate impurities attached to the surface of the filter plate 405 are thrown into the collection bin 408 for collection, which is convenient for use.

[0024] Refer to Figures 1-6 As shown, in a preferred embodiment, a supplementary injection mechanism 5 is installed in the inner cavity of the denitration tank 1 for supplementing the solvent in the spraying liquid. As the flue gas is sprayed, the alkaline solution will react with the acidic gas in the gas to generate new compounds, gradually consuming the alkaline substances in the solution and causing the alkalinity of the solution to decrease. In order to maintain the effectiveness of the solution, it is necessary to supplement the alkaline solvent; the supplementary injection mechanism 5 includes a solvent tank 501 and a supplementary injection hole 502. The solvent tank 501 is fixedly installed on the side wall of the denitration tank 1 for storing the solvent. A supplementary injection hole 502 is provided on the side wall of the denitration tank 1. A water pipe is connected between the solvent tank 501 and the supplementary injection hole 502. A sealing plate 503 is slidably installed in the inner cavity of the denitration tank 1 for closing the supplementary injection hole 502. A first spring 504 is fixedly installed in the inner cavity of the denitration tank 1. One end of the first spring 504 is fixedly connected to the denitration tank 1, and the other end of the first spring 504 is fixedly connected to the sealing plate 503 for driving the sealing plate 503 to move upward.

[0025] Refer to Figures 1-6As shown, in a preferred embodiment, an extrusion plate 505 is fixedly installed on the side wall of the sealing plate 503. A second rotating shaft 506 is rotatably installed on the side wall of the denitration tank 1. One end of the second rotating shaft 506 is fixedly installed with an eccentric wheel 507. The extrusion plate 505 is in contact with the surface of the eccentric wheel 507. A first motor 508 is fixedly installed on the side wall of the denitration tank 1. The output end of the first motor 508 is fixedly connected to one end of the second rotating shaft 506. A PH sensor 509 is installed on the inner wall of the denitration tank 1 for detecting the acidity and alkalinity of the spraying liquid. The acidity and alkalinity of the spraying liquid can be monitored in real time through the PH sensor 509, and a threshold value is preset. When the alkalinity of the spraying liquid is lower than the threshold value, the first motor 508 is started to drive the eccentric wheel 507 to rotate half a turn. Under the action of the first spring 504, the sealing plate 503 is driven to move upward, canceling the sealing of the refilling hole 502. Then the solvent in the solvent tank 501 can flow into the denitration tank 1 through the refilling hole 502 to adjust the alkalinity of the spraying liquid, ensuring the spraying effect. After the alkalinity reaches the standard, the first motor 508 rotates half a turn again, driving the sealing plate 503 to descend through the eccentric wheel 507 to seal the refilling hole 502 again.

[0026] Referring to Figures 1-6 As shown, in a preferred embodiment, a sleeve shaft 510 is rotatably installed in the inner cavity of the denitration tank 1. A third rotating shaft 511 is installed in the inner cavity of the sleeve shaft 510. A spline groove 512 is formed in the inner cavity of the sleeve shaft 510. Spline teeth 513 are fixedly installed on the surface of the third rotating shaft 511. The spline teeth 513 are engaged with the spline groove 512. A lifting plate 514 is sleeved on the surface of the third rotating shaft 511. The third rotating shaft 511 is rotatably connected to the lifting plate 514. A first chuck 515 is fixedly installed on the surface of the third rotating shaft 511. A second chuck 516 is fixedly installed at the bottom of the first rotating shaft 409. The first chuck 515 is adapted to the second chuck 516. A second spring 517 is fixedly installed in the inner cavity of the denitration tank 1. The other end of the second spring 517 is fixedly connected to the lifting plate 514, which is used to drive the lifting plate 514 to move downward and abut against the surface of the eccentric wheel 507. A transverse shaft 518 is fixedly installed on the side wall of the sleeve shaft 510. A plurality of stirring rods 519 are installed on the surface of the transverse shaft 518 for mixing the solvent into the spraying liquid. When the sealing plate 503 moves upward for solvent filling, the lifting plate 514 is driven to move upward synchronously through the eccentric wheel 507, so that the first chuck 515 is engaged with the second chuck 516, thereby driving the sleeve shaft 510 and the stirring rods 519 to rotate synchronously through the first rotating shaft 409 to mix the solvent into the spraying liquid and improve the uniformity of the spraying liquid.

[0027] In a preferred embodiment, the pH sensor 509 can monitor the pH value of the spray liquid in real time, and a threshold value is set in advance. When the alkalinity of the spray liquid is lower than the threshold value, the first motor 508 starts and drives the eccentric wheel 507 to rotate half a circle. Under the action of the first spring 504, the sealing plate 503 is driven to move upward, and the seal of the filling hole 502 is cancelled. Then, the solvent in the solvent tank 501 can flow into the denitrification tank 1 through the filling hole 502, thereby adjusting the alkalinity of the spray liquid and ensuring the spraying effect. When the sealing plate 503 moves upward and the solvent is added, the lifting plate 514 is driven to move upward synchronously by the eccentric wheel 507, so that the first chuck 515 is engaged with the second chuck 516, thereby driving the sleeve shaft 510 and the stirring rod 519 to rotate synchronously through the first rotating shaft 409, mixing the solvent into the spray liquid, and improving the uniformity of the spray liquid.

[0028] Reference Figures 1-9 As shown, in a preferred embodiment, a denitrification mechanism 6 is installed in the inner cavity of the denitrification tank 1 for injecting ozone to denitrify the flue gas, and the denitrification mechanism 6 includes a fourth rotating shaft 601 and a roller 602. The fourth rotating shaft 601 is rotatably installed in the inner cavity of the denitrification tank 1, and the roller 602 is fixedly installed on the surface of the fourth rotating shaft 601. A second motor 603 is fixedly installed on the surface of the denitrification tank 1, and a first gear 604 is fixedly installed on the output end of the second motor 603 and the surface of the fourth rotating shaft 601. The two first gears 604 are meshed with each other. A gear box 605 is installed in the inner cavity of the denitrification tank 1, and a second gear 606 is fixedly installed on the bottom of the fourth rotating shaft 601 and the surface of the first rotating shaft 409. A third gear 607 is rotatably installed on the inner wall of the gear box 605. The third gear 607 is meshed with the two second gears 606 and is used to drive the fourth rotating shaft 601 and the first rotating shaft 409 to rotate in opposite directions.

[0029] Reference Figures 1-9As shown, in a preferred embodiment, a rotating ring 608 is rotatably mounted on the surface of the rotating roller 602. A dispersion blade 609 is fixedly mounted on the side wall of the rotating ring 608 for dispersing flue gas. A plurality of spray holes 610 are formed in the side wall of the rotating roller 602 for spraying ozone. The fourth rotating shaft 601 is hollow, and the hollow part of the fourth rotating shaft 601 is communicated with the spray holes 610. An adjusting ring 611 is slidably mounted in the inner cavity of the rotating roller 602. A plurality of adjusting holes 612 are formed in the side wall of the adjusting ring 611 for adjusting the opening degree of the spray holes 610, so as to control the injection flow rate of ozone. A third spring 613 is mounted in the inner cavity of the rotating roller 602, and the other end of the third spring 613 is fixedly connected with the adjusting ring 611 for driving the adjusting ring 611 to move downward. A driving block 614 is fixedly mounted on the surface of the rotating ring 608, and the surface of the driving block 614 is wedge-shaped. A fourth spring 615 is fixedly mounted in the inner cavity of the rotating roller 602, and the other end of the fourth spring 615 is fixedly connected with the driving block 614 for driving the rotating ring 608 to rotate. An inclined groove 616 is formed in the side wall of the adjusting ring 611, and a flow disturbing rod 617 is fixedly mounted on the side wall of the rotating roller 602 for mixing ozone into the flue gas.

[0030] In a preferred embodiment, during use, the rotating roller 602 is driven to rotate by the second motor 603. Ozone is generated by an ozone generator and injected into the hollow part of the fourth rotating shaft 601. As the rotating roller 602 rotates, the rotating ring 608 and the dispersion blade 609 are driven to rotate synchronously. Then, the flue gas is dispersed by the dispersion blade 609, and the flue gas can cause resistance to the dispersion blade 609, causing the rotating ring 608 to rotate relative to the rotating roller 602, and the fourth spring 615 is compressed. Moreover, the greater the flow rate of the flue gas, the greater the resistance received by the dispersion blade 609, and the greater the compression amount of the fourth spring 615. Subsequently, the adjusting ring 611 is pushed upward by the driving block 614, so that the adjusting holes 612 are communicated with the spray holes 610, and then ozone can be sprayed from the spray holes 610 into the flue gas. Moreover, the greater the resistance received by the dispersion blade 609, the greater the upward movement degree of the adjusting ring 611, and the greater the coincidence degree of the adjusting holes 612 and the spray holes 610, that is, the greater the spraying flow rate of ozone, realizing the automatic adjustment of the ozone flow rate and facilitating use.

[0031] Specifically, the working principle of the ozone flue gas denitration device is as follows: During use, an alkaline solution is first injected into the denitration tank 1, and the flue gas is injected into the denitration tank 1 through the air inlet pipe 2. The alkaline solution can be injected into the spray pipe 401 by the water pump 403 and sprayed into the flue gas by the spray head 402 to spray the flue gas, remove particulate impurities in the flue gas, and can effectively remove acidic gases such as sulfur dioxide in the flue gas, and humidify the flue gas, providing favorable conditions for the subsequent ozone reaction. Moreover, during the spraying process, the temperature of the flue gas will decrease and the humidity will increase, which helps to improve the reaction efficiency of ozone. Subsequently, the rotating seat 406 and the scraping plate 407 are driven to rotate by the first rotating shaft 409. Under the action of centrifugal force, the particulate impurities attached to the surface of the filter plate 405 are thrown into the collection bin 408 for collection, facilitating use.

[0032] The pH sensor 509 can monitor the pH value of the spray liquid in real time, and a threshold value is preset. When the alkalinity of the spray liquid is lower than the threshold value, the first motor 508 starts, driving the eccentric wheel 507 to rotate half a turn. Under the action of the first spring 504, the sealing plate 503 is driven to move upward, canceling the sealing of the make-up hole 502. Then the solvent in the solvent tank 501 can flow into the denitration tank 1 through the make-up hole 502, realizing the adjustment of the alkalinity of the spray liquid, ensuring the spray effect. When the sealing plate 503 moves upward for solvent filling, the lifting plate 514 is driven to move upward synchronously by the eccentric wheel 507, so that the first chuck 515 is engaged with the second chuck 516. Then the sleeve shaft 510 and the stirring rod 519 are driven to rotate synchronously by the first rotating shaft 409, mixing the solvent into the spray liquid and improving the uniformity of the spray liquid.

[0033] The second motor 603 drives the roller 602 to rotate, ozone is generated by the ozone generator and injected into the hollow part of the fourth rotating shaft 601. As the roller 602 rotates, the rotating ring 608 and the dispersion blades 609 are driven to rotate synchronously. Then the flue gas is dispersed by the dispersion blades 609, and the flue gas can cause resistance to the dispersion blades 609, making the rotating ring 608 rotate relative to the roller 602, and the fourth spring 615 is compressed. The greater the flue gas flow rate, the greater the resistance received by the dispersion blades 609, and the greater the compression amount of the fourth spring 615. Subsequently, the adjusting ring 611 is pushed upward by the driving block 614, making the adjusting hole 612 communicate with the spray hole 610. Then the ozone can be sprayed into the flue gas from the spray hole 610. The greater the resistance received by the dispersion blades 609, the greater the upward movement degree of the adjusting ring 611, and the greater the overlap degree between the adjusting hole 612 and the spray hole 610, that is, the greater the ozone spray flow rate, realizing the automatic adjustment of the ozone flow rate and facilitating use.

[0034] An ozone flue gas denitration method, applicable to the above-mentioned ozone flue gas denitration device, includes the following steps: S1: Pretreatment; first, inject an alkaline solution into the denitration tank 1, inject the flue gas into the denitration tank 1 through the air inlet pipe 2, inject the alkaline solution into the spray pipe 401 through the water pump 403, and spray it into the flue gas by the nozzle 402 to spray the flue gas and remove the particulate impurities in the flue gas. Subsequently, the rotating seat 406 and the scraper 407 are driven to rotate by the first rotating shaft 409, and under the action of centrifugal force, the particulate impurities attached to the surface of the filter plate 405 are thrown into the collection bin 408 for collection; S2: Supplementary injection of solvent; The pH value of the spray liquid is monitored in real time by the pH sensor 509, and a threshold value is preset. When the alkalinity of the spray liquid is lower than the threshold value, the first motor 508 is started to drive the eccentric wheel 507 to rotate half a turn. Under the action of the first spring 504, the sealing plate 503 is driven to move upward, canceling the seal of the supplementary injection hole 502. Then the solvent in the solvent tank 501 flows into the denitration tank 1 through the supplementary injection hole 502 to realize the adjustment of the alkalinity of the spray liquid. When the sealing plate 503 moves upward for solvent injection, the lifting plate 514 is driven to move upward synchronously by the eccentric wheel 507, so that the first chuck 515 is engaged with the second chuck 516. Thus, the sleeve shaft 510 and the stirring rod 519 are driven to rotate synchronously by the first rotating shaft 409, mixing the solvent into the spray liquid. S3: Denitration; The roller 602 is driven to rotate by the second motor 603. Ozone is generated by the ozone generator and injected into the hollow part of the fourth rotating shaft 601. As the roller 602 rotates, the rotating ring 608 and the dispersion blades 609 are driven to rotate synchronously. Then the flue gas is dispersed by the dispersion blades 609, and the flue gas causes resistance to the dispersion blades 609, causing the rotating ring 608 to rotate relative to the roller 602, and the fourth spring 615 is compressed. Moreover, the greater the flue gas flow rate, the greater the resistance received by the dispersion blades 609, and the greater the compression amount of the fourth spring 615. Subsequently, the adjusting ring 611 is pushed upward by the driving block 614, making the adjusting hole 612 communicate with the spray hole 610. Then the ozone can be sprayed into the flue gas from the spray hole 610. And the greater the resistance received by the dispersion blades 609, the greater the upward movement degree of the adjusting ring 611, and the greater the coincidence degree of the adjusting hole 612 and the spray hole 610, that is, the greater the ozone spray flow rate, realizing the automatic adjustment of the ozone flow rate.

[0035] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An ozone flue gas denitration device, comprising a denitration tank (1), an intake pipe (2) and an exhaust pipe (3), wherein the intake pipe (2) and the exhaust pipe (3) are installed on the side wall of the denitration tank (1), and is characterized in that, A pretreatment mechanism (4) is installed in the denitration tank (1) for pretreating the flue gas. The pretreatment mechanism (4) includes: A spray pipe (401) installed in the inner cavity of the denitration tank (1). A number of spray nozzles (402) are installed on the surface of the spray pipe (401) for spraying the flue gas. A filter plate (405) installed in the inner cavity of the denitration tank (1) for filtering particulate impurities in the spraying liquid. A rotating seat (406) rotatably installed on the surface of the filter plate (405). A scraping plate (407) is fixedly installed on the side wall of the rotating seat (406). A replenishing mechanism (5) is installed in the inner cavity of the denitration tank (1) for replenishing the solvent in the spraying liquid. The replenishing mechanism (5) includes a solvent tank (501) and a replenishing hole (502). The solvent tank (501) is fixedly installed on the side wall of the denitration tank (1) for storing the solvent. A replenishing hole (502) is provided on the side wall of the denitration tank (1). A water pipe is connected between the solvent tank (501) and the replenishing hole (502).

2. The ozone flue gas denitration device according to claim 1, wherein A water pump (403) is installed on the side wall of the denitration tank (1). A water pipe is connected between the water inlet end of the water pump (403) and the inner cavity of the denitration tank (1). A water pipe is connected between the water outlet end of the water pump (403) and the spray pipe (401). A drain pipe (404) is installed on the side wall of the denitration tank (1).

3. An ozone flue gas denitrification device according to claim 2, characterized in that, The scraping plate (407) is in contact with the surface of the filter plate (405) for scraping off the particulate impurities attached to the surface of the filter plate (405). A collection bin (408) is installed on the side wall of the denitration tank (1) for collecting the particulate impurities. A first rotating shaft (409) is fixedly penetrated through the inner cavity of the rotating seat (406) for driving the scraping plate (407) to rotate.

4. An ozone flue gas denitration device according to claim 3, characterized in that, A sealing plate (503) is slidably installed in the inner cavity of the denitration tank (1) for closing the replenishing hole (502). A first spring (504) is fixedly installed in the inner cavity of the denitration tank (1). One end of the first spring (504) is fixedly connected to the denitration tank (1), and the other end of the first spring (504) is fixedly connected to the sealing plate (503) for driving the sealing plate (503) to move upward.

5. An ozone flue gas denitration device according to claim 4, characterized in that, An extrusion plate (505) is fixedly installed on the side wall of the sealing plate (503). A second rotating shaft (506) is rotatably installed on the side wall of the denitration tank (1). An eccentric wheel (507) is fixedly installed at one end of the second rotating shaft (506). The extrusion plate (505) is in contact with the surface of the eccentric wheel (507). A first motor (508) is fixedly installed on the side wall of the denitration tank (1). The output end of the first motor (508) is fixedly connected to one end of the second rotating shaft (506). A PH sensor (509) is installed on the inner wall of the denitration tank (1) for detecting the acidity and alkalinity of the spraying liquid.

6. The ozone flue gas denitration device according to claim 5, characterized in that, A sleeve shaft (510) is rotatably installed in the inner cavity of the denitration tank (1). A third rotating shaft (511) is installed in the inner cavity of the sleeve shaft (510). A spline groove (512) is formed in the inner cavity of the sleeve shaft (510). A spline tooth (513) is fixedly installed on the surface of the third rotating shaft (511). The spline tooth (513) is engaged with the spline groove (512). A lifting plate (514) is sleeved on the surface of the third rotating shaft (511). The third rotating shaft (511) is rotatably connected to the lifting plate (514).

7. An ozone flue gas denitrification device according to claim 6, characterized in that, A first chuck (515) is fixedly installed on the surface of the third rotating shaft (511). A second chuck (516) is fixedly installed at the bottom of the first rotating shaft (409). The first chuck (515) is adapted to the second chuck (516). A second spring (517) is fixedly installed in the inner cavity of the denitration tank (1). The other end of the second spring (517) is fixedly connected to the lifting plate (514), which is used to drive the lifting plate (514) to move downward and abut against the surface of the eccentric wheel (507). A transverse shaft (518) is fixedly installed on the side wall of the sleeve shaft (510). A plurality of stirring rods (519) are installed on the surface of the transverse shaft (518), which are used to mix the solvent into the spray liquid.

8. An ozone flue gas denitration device according to claim 7, characterized in that, A denitration mechanism (6) is installed in the inner cavity of the denitration tank (1) for injecting ozone to denitrate the flue gas. The denitration mechanism (6) includes a fourth rotating shaft (601) and a roller (602). The fourth rotating shaft (601) is rotatably installed in the inner cavity of the denitration tank (1). A roller (602) is fixedly installed on the surface of the fourth rotating shaft (601). A second motor (603) is fixedly installed on the surface of the denitration tank (1). A first gear (604) is fixedly installed at the output end of the second motor (603) and on the surface of the fourth rotating shaft (601). The two first gears (604) are engaged with each other. A gear box (605) is installed in the inner cavity of the denitration tank (1). A second gear (606) is fixedly installed at the bottom of the fourth rotating shaft (601) and on the surface of the first rotating shaft (409). A third gear (607) is rotatably installed on the inner wall of the gear box (605). The third gear (607) is engaged with the two second gears (606), which is used to drive the fourth rotating shaft (601) and the first rotating shaft (409) to rotate in opposite directions.

9. The ozone flue gas denitration device according to claim 8, characterized in that, A rotating ring (608) is rotatably mounted on the surface of the rotating roller (602). A dispersion blade (609) is fixedly mounted on the side wall of the rotating ring (608) for dispersing flue gas. A plurality of spray holes (610) are formed in the side wall of the rotating roller (602) for spraying ozone. The fourth rotating shaft (601) is hollow, and the hollow part of the fourth rotating shaft (601) is communicated with the spray holes (610). An adjusting ring (611) is slidably mounted in the inner cavity of the rotating roller (602). A plurality of adjusting holes (612) are formed in the side wall of the adjusting ring (611) for adjusting the opening degree of the spray holes (610). A third spring (613) is mounted in the inner cavity of the rotating roller (602), and the other end of the third spring (613) is fixedly connected to the adjusting ring (611) for driving the adjusting ring (611) to move downward. A driving block (614) is fixedly mounted on the surface of the rotating ring (608), and the surface of the driving block (614) is wedge-shaped. A fourth spring (615) is fixedly mounted in the inner cavity of the rotating roller (602), and the other end of the fourth spring (615) is fixedly connected to the driving block (614) for driving the rotating ring (608) to rotate. An inclined groove (616) is formed in the side wall of the adjusting ring (611), and a flow disturbing rod (617) is fixedly mounted on the side wall of the rotating roller (602) for mixing ozone into the flue gas.

10. A method for denitrifying flue gas with ozone, applicable to the ozone flue gas denitrification device described in claim 9 above, is characterized in that, It includes the following steps: S1: Pretreatment; First, inject an alkaline solution into the denitration tank (1). Inject flue gas into the denitration tank (1) through the intake pipe (2). Inject the alkaline solution into the spray pipe (401) through the water pump (403), and spray it into the flue gas through the spray head (402) to spray the flue gas and remove particulate impurities in the flue gas. Subsequently, drive the rotating seat (406) and the scraper (407) to rotate through the first rotating shaft (409). Under the action of centrifugal force, the particulate impurities attached to the surface of the filter plate (405) are thrown into the collection bin (408) for collection; S2: Supplementary injection of solvent; The pH sensor (509) is used to monitor the pH value of the spraying liquid in real time, and a threshold value is preset in advance. When the alkalinity of the spraying liquid is lower than the threshold value, the first motor (508) is started to drive the eccentric wheel (507) to rotate half a turn. Under the action of the first spring (504), drive the sealing plate (503) to move upward to cancel the sealing of the supplementary injection hole (502). Then, the solvent in the solvent tank (501) flows into the denitration tank (1) through the supplementary injection hole (502) to adjust the alkalinity of the spraying liquid. When the sealing plate (503) moves upward for solvent injection, drive the lifting plate (514) to move upward synchronously through the eccentric wheel (507) to engage the first chuck (515) with the second chuck (516). Thus, drive the sleeve shaft (510) and the stirring rod (519) to rotate synchronously through the first rotating shaft (409) to mix the solvent into the spraying liquid; S3: Denitrification; Drive the rotating roller (602) to rotate through the second motor (603), generate ozone through the ozone generator, and inject it into the hollow part of the fourth rotating shaft (601). As the rotating roller (602) rotates, drive the rotating ring (608) and the dispersing blade (609) to rotate synchronously. Then, disperse the flue gas through the dispersing blade (609), and the flue gas causes resistance to the dispersing blade (609), making the rotating ring (608) rotate relative to the rotating roller (602), compressing the fourth spring (615). Moreover, the greater the flue gas flow rate, the greater the resistance received by the dispersing blade (609), and the greater the compression amount of the fourth spring (615). Subsequently, push the adjusting ring (611) upward through the driving block (614) to make the adjusting hole (612) communicate with the spraying hole (610). Then, ozone can be sprayed from the spraying hole (610) into the flue gas. And the greater the resistance received by the dispersing blade (609), the greater the upward movement degree of the adjusting ring (611), and the greater the coincidence degree of the adjusting hole (612) and the spraying hole (610), that is, the greater the ozone spraying flow rate, automatically adjusting the ozone flow rate.

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