Ozone flue gas denitrification device and denitrification method

Abstract

The present invention provides an ozone flue gas denitrification device and a denitrification method thereof, belonging to the technical field of flue gas denitrification. The ozone flue gas denitrification device comprises a denitrification tank, an air inlet pipe and an exhaust pipe, wherein the air inlet pipe and the exhaust pipe are installed on the side wall of the denitrification tank, and a pretreatment mechanism is installed in the denitrification tank, wherein the pretreatment mechanism comprises a nozzle, a filter plate and a rotating seat. The present invention sets a pretreatment mechanism, wherein an alkaline solution can be injected into the nozzle through a water pump, and sprayed into the flue gas through a nozzle, spraying the flue gas to 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 subsequent ozone reaction, and during the spraying process, the temperature of the flue gas will decrease, while the humidity will increase, which will help to improve the reaction efficiency of ozone, and then the rotating seat and the scraper are driven to rotate by the first rotating shaft, and 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, which is convenient for use.

Description

Technical Field

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

[0002] Denitrification refers to the removal of nitrogen oxides from industrial flue gases. Nitrogen oxides are a major cause of air pollution and acid rain. When nitrogen oxides react with water vapor, oxygen, and other substances in the atmosphere, they form acid rain, leading to soil acidification and water pollution, seriously impacting the ecological environment and posing a threat to human health. Nitrogen oxides can cause respiratory diseases, particularly 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 produce nitrogen dioxide, which is further decomposed by oxygen into harmless nitrogen and oxygen, thereby achieving flue gas denitrification. However, existing ozone flue gas denitrification devices usually inject ozone directly into the flue gas. The flue gas temperature is relatively high, and the solid particulate matter it contains will affect the reaction efficiency and reduce the flue gas denitrification effect. Summary of the Invention

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

[0005] The present invention is achieved in that:

[0006] The present invention provides an ozone flue gas denitrification device, comprising a denitrification tank, an air intake pipe, and an exhaust pipe, wherein the air intake pipe and the exhaust pipe are mounted on the side wall of the denitrification tank. A pretreatment mechanism is mounted in the denitrification tank for pretreating the flue gas, and the pretreatment mechanism comprises:

[0007] A nozzle, which is installed in the inner cavity of the denitrification tank and has a plurality of nozzles installed on the surface of the nozzle for spraying the flue gas;

[0008] A filter plate is installed in the inner cavity of the denitrification tank and is used to filter particulate impurities in the spray liquid;

[0009] A rotating seat, the rotating seat is rotatably mounted on the surface of the filter plate, and a scraper is fixedly mounted on the side wall of the rotating seat;

[0010] The inner cavity of the denitrification tank is equipped with a filling mechanism for filling solvent into the spray liquid. The filling mechanism includes a solvent box and a filling hole. The solvent box is fixedly mounted on the side wall of the denitrification tank for storing solvent. The side wall of the denitrification tank is provided with a filling hole. A water pipe is connected between the solvent box and the filling hole.

[0011] In a preferred embodiment, a water pump is installed on the side wall of the denitrification tank, a water pipe connects the water inlet of the water pump to the inner cavity of the denitrification tank, a water pipe connects the water outlet of the water pump to the nozzle, and a drain pipe is installed on the side wall of the denitrification tank.

[0012] In a preferred embodiment, the scraper contacts the surface of the filter plate and is used to scrape off particulate impurities attached to the surface of the filter plate. The side wall of the denitrification tank is equipped with a collection bin for collecting particulate impurities. The inner cavity of the rotating seat is fixed with a first rotating shaft for driving the scraper to rotate.

[0013] In a preferred solution, a sealing plate is slidably installed in the inner cavity of the denitrification tank for closing the refilling hole, and a first spring is fixedly installed in the inner cavity of the denitrification tank, one end of the first spring is fixedly connected to the denitrification tank, and the other end of the first spring is fixedly connected to the sealing plate for driving the sealing plate to move up.

[0014] In a preferred solution, 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 denitrification tank, an eccentric wheel is fixedly installed on 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 denitrification tank, the output end of the first motor is fixedly connected to one end of the second rotating shaft, and a pH sensor is installed on the inner wall of the denitrification tank for detecting the acidity and alkalinity of the spray liquid.

[0015] In a preferred embodiment, a sleeve shaft is rotatably installed in the inner cavity of the denitrification tank, a third rotating shaft is installed in the inner cavity of the sleeve shaft, a spline groove is opened 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, and the third rotating shaft is rotatably connected to the lifting plate.

[0016] In a preferred embodiment, a first chuck is fixedly mounted on the surface of the third rotating shaft, a second chuck is fixedly mounted on the bottom of the first rotating shaft, the first chuck is adapted to the second chuck, a second spring is fixedly mounted on the inner cavity of the denitrification tank, the other end of the second spring is fixedly connected to the lifting plate, and is used to drive the lifting plate to move downward and abut against the surface of the eccentric wheel, a horizontal shaft is fixedly mounted on the side wall of the sleeve shaft, and a number of stirring rods are mounted on the surface of the horizontal shaft, which are used to mix the solvent into the spray liquid.

[0017] In a preferred embodiment, a denitrification mechanism is installed in the inner cavity of the denitrification tank for injecting ozone to denitrify the flue gas. The denitrification mechanism includes a fourth rotating shaft and a roller. The fourth rotating shaft is rotatably installed in the inner cavity of the denitrification tank. A roller is fixedly installed on the surface of the fourth rotating shaft. A second motor is fixedly installed on the surface of the denitrification tank. A first gear is fixedly installed on the output end of the second motor and the surface of the fourth rotating shaft. The two first gears are engaged with each other. A gear box is installed in the inner cavity of the denitrification tank. A second gear is fixedly installed on the bottom of the fourth rotating shaft and the surface of the first rotating shaft. A third gear is rotatably installed on the inner wall of the gear box. The third gear is engaged with the two second gears and is used to drive the fourth rotating shaft and the first rotating shaft to rotate in opposite directions.

[0018] In a preferred embodiment, a rotating ring is rotatably installed on the surface of the roller, and a dispersion blade is fixedly installed on the side wall of the rotating ring for dispersing flue gas, and a plurality of nozzles are opened on the side wall of the roller for spraying ozone, the fourth rotating shaft is hollow, and the hollow part of the fourth rotating shaft is communicated with the nozzle, an adjusting ring is slidably installed in the inner cavity of the roller, and a plurality of adjusting holes are opened on the side wall of the adjusting ring for adjusting the opening of the nozzle, a third spring is installed in the inner cavity of the roller, and the other end of the third spring is fixedly connected to the adjusting ring for driving the adjusting ring to move downward, a driving block is fixedly installed on the surface of the rotating ring, and the surface of the driving block is wedge-shaped, a fourth spring is fixedly installed in the inner cavity of the roller, and the other end of the fourth spring is fixedly connected to the driving block for driving the rotating ring to rotate, an inclined groove is opened on the side wall of the adjusting ring, and a spoiler rod is fixedly installed on the side wall of the roller for mixing ozone into the flue gas.

[0019] An ozone flue gas denitrification method, applicable to the above-mentioned ozone flue gas denitrification device, comprises the following steps:

[0020] S1: Pretreatment: First, an alkaline solution is injected into the denitrification tank, and then the flue gas is injected into the denitrification tank through the air inlet pipe. The alkaline solution is injected into the nozzle through the water pump and sprayed into the flue gas through the nozzle to spray the flue gas to remove particulate impurities in the flue gas. Then, the rotating seat and scraper are driven by the first rotating shaft 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;

[0021] S2: Refilling solvent; the pH value of the spray liquid is monitored in real time by a pH sensor, and a threshold value is pre-set. When the alkalinity of the spray liquid is lower than the threshold value, the first motor starts, driving the eccentric wheel to rotate half a circle. Under the action of the first spring, the sealing plate is driven to move up, and the sealing of the filling hole is cancelled. Then, the solvent in the solvent tank flows into the denitrification tank through the filling hole, thereby adjusting the alkalinity of the spray liquid. When the sealing plate moves up, when the solvent is added, the lifting plate is driven to move up synchronously by the eccentric wheel, so that the first chuck is engaged with the second chuck, thereby driving the sleeve shaft and the stirring rod to rotate synchronously through the first rotating shaft, and the solvent is mixed into the spray liquid;

[0022] S3: Denitrification; the roller is driven to rotate by the second motor, and ozone is generated by the ozone generator and injected into the hollow part of the fourth shaft. As the roller rotates, the rotating ring and the dispersion leaves are driven to rotate synchronously, and the flue gas is dispersed by the dispersion leaves. The flue gas creates resistance to the dispersion leaves, causing the rotating ring to rotate relative to the roller, and the fourth spring is compressed. The greater the flue gas flow rate, the greater the resistance encountered by the dispersion leaves, and the greater the compression of the fourth spring. Subsequently, the adjusting ring is pushed upward by the driving block to connect the adjusting hole and the nozzle hole, so that ozone can be sprayed into the flue gas from the nozzle hole. The greater the resistance encountered by the dispersion leaves, the greater the upward movement of the adjusting ring, the greater the overlap between the adjusting hole and the nozzle hole, that is, the greater the ozone spray flow rate, and the ozone flow rate is automatically adjusted.

[0023] The present invention provides an ozone flue gas denitrification device and a denitrification method thereof, the beneficial effects of which include:

[0024] 1. By setting up a pretreatment mechanism, the alkaline solution can be injected into the nozzle through a water pump and sprayed into the flue gas through the nozzle to spray the flue gas, thereby removing particulate impurities in the flue gas, effectively removing acidic gases such as sulfur dioxide in the flue gas, and humidifying the flue gas, providing favorable conditions for the subsequent ozone reaction. In addition, during the spraying process, the temperature of the flue gas will decrease and the humidity will increase, which will help improve the reaction efficiency of the ozone. Subsequently, the rotating seat and the scraper are driven to rotate by the first rotating shaft. 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, which is convenient for use.

[0025] 2. By setting up a filling mechanism, the pH sensor can monitor the pH value of the spray liquid in real time and pre-set a threshold value. When the alkalinity of the spray liquid is lower than the threshold value, the first motor starts and drives the eccentric wheel to rotate half a circle. Under the action of the first spring, the sealing plate is driven to move up and the sealing of the filling hole is cancelled. Then, the solvent in the solvent tank can flow into the denitrification tank through the filling hole, thereby adjusting the alkalinity of the spray liquid and ensuring the spraying effect. When the sealing plate moves up and the solvent is added, the lifting plate is driven to move up synchronously by the eccentric wheel, so that the first chuck is engaged with the second chuck, thereby driving the sleeve shaft and the stirring rod to rotate synchronously through the first rotating shaft, mixing the solvent into the spray liquid and improving the uniformity of the spray liquid.

[0026] 3. By setting up a denitrification mechanism, the roller is driven to rotate by the second motor, ozone is generated by the ozone generator and injected into the hollow part of the fourth shaft. As the roller rotates, the rotating ring and the dispersion leaves are driven to rotate synchronously, and the flue gas is dispersed by the dispersion leaves. The flue gas can cause resistance to the dispersion leaves, causing the rotating ring to rotate relative to the roller, and the fourth spring is compressed. The greater the flue gas flow, the greater the resistance encountered by the dispersion leaves, and the greater the compression of the fourth spring. Subsequently, the adjusting ring is pushed upward by the driving block to connect the adjusting hole and the spray hole, so that ozone can be sprayed into the flue gas from the spray hole. The greater the resistance encountered by the dispersion leaves, the greater the upward movement of the adjusting ring, the greater the overlap between the adjusting hole and the spray hole, that is, the greater the ozone spray flow, thereby realizing automatic adjustment of the ozone flow and convenient use. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be considered as limiting the scope. A person of ordinary skill in the art can also derive other relevant drawings based on these drawings without inventive effort.

[0028] Figure 1 is a front perspective view provided by an embodiment of the present invention;

[0029] Figure 2 A side perspective view of an embodiment of the present invention is provided;

[0030] Figure 3 A front cross-sectional view of an embodiment of the present invention is provided;

[0031] Figure 4 A side cross-sectional view of an embodiment of the present invention is provided;

[0032] Figure 5 Provided for the embodiments of the present invention Figure 4 Enlarged view of point A in the middle;

[0033] Figure 6 Provided for the embodiments of the present invention Figure 4 Enlarged view of point B in the middle;

[0034] Figure 7 A cross-sectional view of a roller provided in an embodiment of the present invention;

[0035] Figure 8 Provided for the embodiments of the present invention Figure 7 Enlarged view of point C in the middle;

[0036] Figure 9 A three-dimensional diagram of a swivel provided in an embodiment of the present invention.

[0037] In the figure: 1. Denitrification tank; 2. Inlet pipe; 3. Exhaust pipe; 4. Pretreatment mechanism; 401. Nozzle; 402. Nozzle; 403. Water pump; 404. Drain pipe; 405. Filter plate; 406. Rotating seat; 407. Scraper; 408. Collection chamber; 409. First rotating shaft; 5. Refilling mechanism; 501. Solvent tank; 502. Refilling hole; 503. Closing 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 axis; 519, stirring rod; 6, denitrification mechanism; 601, fourth rotating shaft; 602, rotating 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 slot; 617, spoiler rod. DETAILED DESCRIPTION

[0038] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0039] Reference Figures 1-9As shown, the present invention provides a technical solution: an ozone flue gas denitrification device, comprising a denitrification tank 1, an air intake pipe 2 and an exhaust pipe 3, the air intake pipe 2 and the exhaust pipe 3 being installed on the side wall of the denitrification tank 1, respectively for air intake and exhaust, a pretreatment mechanism 4 being installed in the denitrification tank 1 for pretreatment of the flue gas, the pretreatment mechanism 4 comprising a nozzle 401, a filter plate 405 and a rotating seat 406, the nozzle 401 being installed in the inner cavity of the denitrification tank 1, a plurality of nozzles 402 being installed on the surface of the nozzle 401 for spraying the flue gas, a water pump 403 being installed on the side wall of the denitrification tank 1, a water inlet end of the water pump 403 being connected to the inner cavity of the denitrification tank 1 by a water pipe, A water pipe is connected between the water outlet of the water pump 403 and the nozzle 401, and a drain pipe 404 is installed on the side wall of the denitrification tank 1. When in use, an alkaline solution is first injected into the denitrification tank 1, and the flue gas is injected into the denitrification tank 1 through the air inlet pipe 2. The alkaline solution can be injected into the nozzle 401 through the water pump 403 and sprayed into the flue gas through the nozzle 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 subsequent ozone reaction. In addition, during the spraying process, the temperature of the flue gas will decrease and the humidity will increase, which will help to improve the reaction efficiency of ozone.

[0040] Reference Figures 1-4 As shown, in a preferred embodiment, a filter plate 405 is installed in the inner cavity of the denitrification tank 1 for filtering particulate impurities in the spray liquid, a rotating seat 406 is rotatably installed on the surface of the filter plate 405, a scraper 407 is fixedly installed on the side wall of the rotating seat 406, the scraper 407 contacts the surface of the filter plate 405, and is used to scrape off the particulate impurities attached to the surface of the filter plate 405, a collecting bin 408 is installed on the side wall of the denitrification tank 1 for collecting particulate impurities, a first rotating shaft 409 is fixedly passed through the inner cavity of the rotating seat 406, and is used to drive the scraper 407 to rotate, and by spraying the flue gas, the particulate impurities in the flue gas fall on the surface of the filter plate 405, and then 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 collecting bin 408 for collection, which is convenient for use.

[0041] In a preferred embodiment, when in use, an alkaline solution is first injected into the denitrification tank 1, and the flue gas is injected into the denitrification tank 1 through the air inlet pipe 2. The alkaline solution can be injected into the nozzle 401 through the water pump 403 and sprayed into the flue gas by the nozzle 402 to spray the flue gas, thereby removing particulate impurities in the flue gas, and effectively removing acidic gases such as sulfur dioxide in the flue gas, and humidifying the flue gas, providing favorable conditions for subsequent ozone reaction. During the spraying process, the temperature of the flue gas will decrease and the humidity will increase, which will help to improve the reaction efficiency of ozone. Subsequently, the rotating seat 406 and the scraper 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, which is convenient for use.

[0042] Reference Figures 1-6 As shown, in a preferred embodiment, the inner cavity of the denitrification tank 1 is equipped with a filling mechanism 5 for filling the solvent into the spray liquid. As the flue gas is sprayed, the alkaline solution will react with the acidic gas in the gas to generate new compounds, which will gradually consume the alkaline substances in the solution, causing the alkalinity of the solution to decrease. In order to maintain the effectiveness of the solution, the alkaline solvent needs to be replenished; the filling mechanism 5 includes a solvent box 501 and a filling hole 502. The solvent box 501 is fixedly installed on the side wall of the denitrification tank 1 for storing the solvent. The filling hole 502 is opened on the side wall of the denitrification tank 1. A water pipe is connected between the solvent box 501 and the filling hole 502. A sealing plate 503 is slidably installed in the inner cavity of the denitrification tank 1 for sealing the filling hole 502. A first spring 504 is fixedly installed in the inner cavity of the denitrification tank 1. One end of the first spring 504 is fixedly connected to the denitrification 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.

[0043] Reference 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, an eccentric wheel 507 is fixedly installed on 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 spray liquid, and the spray liquid can be monitored in real time through the pH sensor 509 The pH value of the spray liquid is determined, 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 is started, driving 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 up, 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. After the alkalinity reaches the standard, the first motor 508 rotates half a circle again, and drives the sealing plate 503 to descend through the eccentric wheel 507 to seal the filling hole 502 again.

[0044] Reference Figures 1-6 As shown, in a preferred embodiment, a sleeve shaft 510 is rotatably installed in the inner cavity of the denitrification tank 1, a third rotating shaft 511 is installed in the inner cavity of the sleeve shaft 510, a spline groove 512 is opened 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 meshed 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 on the bottom of the first rotating shaft 409, the first chuck 515 is adapted to the second chuck 516, and the inner cavity of the denitrification tank 1 is fixed. A second spring 517 is installed, and 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 horizontal shaft 518 is fixedly installed on the side wall of the sleeve shaft 510, and a number of stirring rods 519 are installed on the surface of the horizontal shaft 518, which are used to mix the solvent into the spray liquid. When the sealing plate 503 moves upward and the solvent is added, 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 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.

[0045] 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.

[0046] 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.

[0047] Reference Figures 1-9As shown, in a preferred embodiment, a rotating ring 608 is rotatably mounted on the surface of the roller 602, and a dispersion blade 609 is fixedly mounted on the side wall of the rotating ring 608 for dispersing the flue gas. A plurality of nozzles 610 are opened on the side wall of the roller 602 for spraying ozone. The fourth rotating shaft 601 is hollow, and the hollow part of the fourth rotating shaft 601 is connected to the nozzle 610. An adjusting ring 611 is slidably mounted on the inner cavity of the roller 602, and a plurality of adjusting holes 612 are opened on the side wall of the adjusting ring 611 for adjusting the opening of the nozzle 610, thereby controlling the injection flow of ozone. A third spring 613 is installed in the inner cavity of 02, and the other end of the third spring 613 is fixedly connected to the adjusting ring 611, which is used to drive the adjusting ring 611 to move downward. A driving block 614 is fixedly installed 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 installed in the inner cavity of the roller 602, and the other end of the fourth spring 615 is fixedly connected to the driving block 614, which is used to drive the rotating ring 608 to rotate. An inclined groove 616 is provided on the side wall of the adjusting ring 611, and a spoiler rod 617 is fixedly installed on the side wall of the roller 602, which is used to mix ozone into the flue gas.

[0048] In a preferred embodiment, when in use, the roller 602 is driven to rotate by the second motor 603, and ozone is generated by the ozone generator and injected into the hollow part of the fourth shaft 601. As the roller 602 rotates, the rotating ring 608 and the dispersion leaves 609 are driven to rotate synchronously, and the smoke is dispersed by the dispersion leaves 609. The smoke can cause resistance to the dispersion leaves 609, causing the rotating ring 608 to rotate relative to the roller 602, and the fourth spring 615 is compressed. The greater the smoke flow rate, the greater the resistance encountered by the dispersion leaves 609, and the greater the compression of the fourth spring 615. Subsequently, the adjusting ring 611 is pushed upward by the driving block 614 to connect the adjusting hole 612 with the nozzle 610, and the ozone can be sprayed into the smoke from the nozzle 610. The greater the resistance encountered by the dispersion leaves 609, the greater the upward movement of the adjusting ring 611, the greater the overlap between the adjusting hole 612 and the nozzle 610, that is, the greater the ozone spray flow rate, thereby realizing automatic adjustment of the ozone flow rate and convenient use.

[0049] Specifically, the working principle of the ozone flue gas denitrification device is as follows: when in use, an alkaline solution is first injected into the denitrification tank 1, and the flue gas is injected into the denitrification tank 1 through the air inlet pipe 2. The alkaline solution can be injected into the nozzle 401 through the water pump 403, and sprayed into the flue gas by the nozzle 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 subsequent ozone reactions. In addition, during the spraying process, the temperature of the flue gas will decrease and the humidity will increase, which will help improve the reaction efficiency of ozone. Subsequently, the rotating seat 406 and the scraper 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, which is convenient for use.

[0050] The pH sensor 509 can monitor the pH value of the spray liquid in real time and set a threshold value 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.

[0051] The roller 602 is driven to rotate by the second motor 603, and ozone is generated by the ozone generator and injected into the hollow part of the fourth shaft 601. As the roller 602 rotates, the rotating ring 608 and the dispersion leaves 609 are driven to rotate synchronously, so that the smoke is dispersed by the dispersion leaves 609. The smoke can cause resistance to the dispersion leaves 609, causing the rotating ring 608 to rotate relative to the roller 602, and the fourth spring 615 is compressed. The greater the smoke flow rate, the greater the resistance encountered by the dispersion leaves 609, and the greater the compression of the fourth spring 615. Then, the driving block 614 pushes the adjustment ring 611 upward to connect the adjustment hole 612 with the nozzle 610, so that ozone can be sprayed into the smoke from the nozzle 610. The greater the resistance encountered by the dispersion leaves 609, the greater the upward movement of the adjustment ring 611, and the greater the overlap between the adjustment hole 612 and the nozzle 610, that is, the greater the ozone spray flow rate, thereby realizing automatic adjustment of the ozone flow rate and convenient use.

[0052] An ozone flue gas denitrification method, applicable to the above-mentioned ozone flue gas denitrification device, comprises the following steps:

[0053] S1: Pretreatment; first, an alkaline solution is injected into the denitration tank 1, and then the flue gas is injected into the denitration tank 1 through the air inlet pipe 2. The alkaline solution is injected into the nozzle 401 through the water pump 403 and sprayed into the flue gas through the nozzle 402 to spray the flue gas to remove 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. 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;

[0054] S2: Refilling solvent; the pH sensor 509 monitors the pH value of the spray liquid in real time and pre-sets a threshold value. When the alkalinity of the spray liquid is lower than the threshold value, the first motor 508 is started, driving 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 refilling hole 502 is cancelled. Then, the solvent in the solvent tank 501 flows into the denitrification tank 1 through the refilling hole 502, thereby adjusting the alkalinity of the spray liquid. 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 to mix the solvent into the spray liquid.

[0055] S3: Denitrification; the roller 602 is driven to rotate by the second motor 603, and ozone is generated by the ozone generator and injected into the hollow part of the fourth shaft 601. As the roller 602 rotates, the rotating ring 608 and the dispersion leaves 609 are driven to rotate synchronously, and the flue gas is dispersed by the dispersion leaves 609. The flue gas creates resistance to the dispersion leaves 609, causing the rotating ring 608 to rotate relative to the roller 602, and the fourth spring 615 is compressed. The greater the flue gas flow rate, the greater the resistance encountered by the dispersion leaves 609, and the greater the compression of the fourth spring 615. Subsequently, the adjusting ring 611 is pushed upward by the driving block 614 to connect the adjusting hole 612 with the nozzle 610, so that ozone can be sprayed into the flue gas from the nozzle 610. The greater the resistance encountered by the dispersion leaves 609, the greater the upward movement of the adjusting ring 611, and the greater the overlap between the adjusting hole 612 and the nozzle 610, that is, the greater the ozone spray flow rate, and the ozone flow rate is automatically adjusted.

[0056] The above are only 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 principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An ozone flue gas denitrification device, comprising a denitrification tank (1), an air intake pipe (2) and an exhaust pipe (3), wherein the air intake pipe (2) and the exhaust pipe (3) are installed on the side wall of the denitrification tank (1), characterized in that: The denitrification tank (1) is provided with a pretreatment mechanism (4) for pre-treating the flue gas. The pretreatment mechanism (4) comprises: A nozzle (401), the nozzle (401) being installed in the inner cavity of the denitrification tank (1), and a plurality of nozzles (402) being installed on the surface of the nozzle (401) for spraying the flue gas; A filter plate (405), the filter plate (405) being installed in the inner cavity of the denitrification tank (1) and used for filtering particulate impurities in the spray liquid; A rotating seat (406), the rotating seat (406) is rotatably mounted on the surface of the filter plate (405), and a scraper (407) is fixedly mounted on the side wall of the rotating seat (406); The inner cavity of the denitrification tank (1) is provided with a filling mechanism (5) for filling the spray liquid with solvent, the filling mechanism (5) comprising a solvent box (501) and a filling hole (502), the solvent box (501) being fixedly mounted on the side wall of the denitrification tank (1) for storing the solvent, the filling hole (502) being provided on the side wall of the denitrification tank (1), and a water pipe being connected between the solvent box (501) and the filling hole (502); A first rotating shaft (409) is fixedly passed through the inner cavity of the rotating seat (406); The denitrification tank (1) is provided with a denitrification mechanism (6) for injecting ozone to denitrify the flue gas. The denitrification mechanism (6) comprises a fourth rotating shaft (601) and a roller (602). The fourth rotating shaft (601) is rotatably mounted in the denitrification tank (1). The roller (602) is fixedly mounted on the surface of the fourth rotating shaft (601). A second motor (603) is fixedly mounted on the surface of the denitrification tank (1). The output end of the second motor (603) and the surface of the fourth rotating shaft (601) are both fixedly mounted with A first gear (604), two of the first gears (604) are meshed with each other, a gear box (605) is installed in the inner cavity of the denitrification tank (1), 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), and the third gear (607) is meshed with the two second gears (606) to drive the fourth rotating shaft (601) and the first rotating shaft (409) to rotate in opposite directions; A rotating ring (608) is rotatably mounted on the surface of the rotating roller (602), and a dispersion blade (609) is fixedly mounted on the side wall of the rotating ring (608) for dispersing the flue gas. A plurality of spray holes (610) are provided on the side wall of the rotating roller (602) for spraying ozone. The fourth rotating shaft (601) is hollow, and the hollow portion of the fourth rotating shaft (601) is in communication with the spray holes (610). An adjusting ring (611) is slidably mounted on the inner cavity of the rotating roller (602), and a plurality of adjusting holes (612) are provided on the side wall of the adjusting ring (611) for adjusting the opening of the spray holes (610). A third spring (611) is mounted on the inner cavity of the rotating roller (602). 13), the other end of the third spring (613) is fixedly connected to the adjusting ring (611) and is used to drive the adjusting ring (611) to move downward, a driving block (614) is fixedly installed 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 installed in the inner cavity of the roller (602), and the other end of the fourth spring (615) is fixedly connected to the driving block (614) and is used to drive the rotating ring (608) to rotate, an inclined groove (616) is provided on the side wall of the adjusting ring (611), and a spoiler rod (617) is fixedly installed on the side wall of the roller (602) for mixing ozone into the flue gas.

2. The ozone flue gas denitrification device according to claim 1, characterized in that: 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 nozzle (401); and a drain pipe (404) is installed on the side wall of the denitration tank (1).

3. The ozone flue gas denitrification device according to claim 2, characterized in that: The scraper (407) contacts the surface of the filter plate (405) and is used to scrape off particulate impurities attached to the surface of the filter plate (405). A collecting bin (408) is installed on the side wall of the denitrification tank (1) for collecting particulate impurities and driving the scraper (407) to rotate.

4. The ozone flue gas denitrification device according to claim 3, characterized in that: A sealing plate (503) is slidably mounted in the inner cavity of the denitration tank (1) for sealing the refilling hole (502). A first spring (504) is fixedly mounted 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. The ozone flue gas denitrification device according to claim 4, characterized in that: An extrusion plate (505) is fixedly mounted on the side wall of the sealing plate (503); a second rotating shaft (506) is rotatably mounted on the side wall of the denitration tank (1); an eccentric wheel (507) is fixedly mounted on one end of the second rotating shaft (506); the extrusion plate (505) contacts the surface of the eccentric wheel (507); a first motor (508) is fixedly mounted on the side wall of the denitration tank (1); an output end of the first motor (508) is fixedly connected to one end of the second rotating shaft (506); and a pH sensor (509) is mounted on the inner wall of the denitration tank (1) for detecting the acidity or alkalinity of the spray liquid.

6. The ozone flue gas denitrification device according to claim 5, characterized in that: A sleeve shaft (510) is rotatably mounted in the inner cavity of the denitrification tank (1), a third rotating shaft (511) is mounted in the inner cavity of the sleeve shaft (510), a spline groove (512) is provided in the inner cavity of the sleeve shaft (510), spline teeth (513) are fixedly mounted on the surface of the third rotating shaft (511), the spline teeth (513) are meshed with the spline groove (512), a lifting plate (514) is sleeved on the surface of the third rotating shaft (511), and the third rotating shaft (511) is rotatably connected to the lifting plate (514).

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

8. An ozone flue gas denitrification method, applicable to the ozone flue gas denitrification device according to claim 7, characterized in that: The steps include: S1: Pretreatment; first, an alkaline solution is 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 is injected into the nozzle (401) through the water pump (403), and sprayed into the flue gas through the nozzle (402), spraying the flue gas to remove 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: Refilling the 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, and the eccentric wheel (507) is driven to rotate half a circle. Under the action of the first spring (504), the sealing plate (503) is driven to move upward, and the sealing of the refilling hole (502) is cancelled. Then, the solvent in the solvent box (501) flows into the denitrification tank (1) through the refilling hole (502), thereby adjusting the alkalinity of the spray liquid. 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) and the second chuck (516) are engaged, thereby driving the sleeve shaft (510) and the stirring rod (519) to rotate synchronously through the first rotating shaft (409), and the solvent is mixed into the spray liquid; S3: Denitrification; the roller (602) is driven to rotate by the second motor (603), and ozone is generated by the ozone generator and injected into the hollow portion 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, and the smoke is dispersed by the dispersion blades (609). The smoke creates resistance to the dispersion blades (609), causing the rotating ring (608) to rotate relative to the roller (602). The fourth spring (615) is compressed, and the greater the smoke flow rate, the more the dispersion blades (609) are dispersed. The greater the resistance encountered by the dispersion leaf (609), the greater the compression of the fourth spring (615), and then the adjusting ring (611) is pushed upward by the driving block (614), so that the adjusting hole (612) and the nozzle hole (610) are connected, and ozone can be sprayed from the nozzle hole (610) into the flue gas. Moreover, the greater the resistance encountered by the dispersion leaf (609), the greater the upward movement of the adjusting ring (611), the greater the overlap between the adjusting hole (612) and the nozzle hole (610), that is, the greater the ozone spray flow rate, and the ozone flow rate is automatically adjusted.

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