Incineration flue gas denitration purification system

Abstract

The utility model relates to an incineration flue gas denitration purification system which comprises an oxidation tower and an absorption tower, the oxidation tower communicates with the absorption tower through a connecting pipe, an exhaust pipe is arranged at the top end of the absorption tower, a main shaft and a plurality of auxiliary shafts are rotationally arranged in the oxidation tower, the main shaft is arranged in the center of the oxidation tower, and the auxiliary shafts are circumferentially and uniformly distributed on the peripheral side of the main shaft; a plurality of mixing rods are arranged on the main shaft and the plurality of auxiliary shafts, a rotating assembly for driving the main shaft and the auxiliary shafts to synchronously rotate is arranged in the oxidation tower, the rotating assembly drives the mixing rods to synchronously rotate around the main shaft and the auxiliary shafts, and the rotating mixing rods break the laminar flow state of flue gas flowing through mechanical force; and the flue gas is fully dispersed into the oxidation tower and is fully contacted with the gas-phase oxidant, so that the flue gas is fully oxidized in the oxidation tower. The flue gas denitration device has the effect of improving the flue gas denitration effect.

Description

Technical Field

[0001] The present application relates to the technical field of flue gas treatment, and in particular to an incineration flue gas denitrification purification system. Background Art

[0002] Waste incineration is a thermal oxidation treatment of combustible organic waste at high temperature. Since it is a relatively complete and thorough method of decomposing and destroying waste, it is widely used in the treatment of hazardous waste. However, a large amount of nitric acid is mixed in the flue gas after the incineration of nitro-containing waste. Before treating this part of the flue gas, it is necessary to denitrify the flue gas.

[0003] Existing denitrification treatment methods usually adopt an oxidative liquid absorption method. During the treatment, the flue gas is first passed into an oxidation tower, and the gas-phase oxidant in the oxidation tower is used to oxidize the nitrogen monoxide with a lower solubility in the flue gas into nitrogen dioxide. The oxidized flue gas enters the absorption tower through a connecting pipe. After contacting the absorption liquid in the absorption tower, the nitrogen dioxide in the flue gas reacts with the alkaline substance in the absorption liquid to form nitrates, thereby achieving denitrification treatment of the flue gas.

[0004] However, after the flue gas enters the absorption tower, it usually combines with the gas-phase oxidant only through the flow of the flue gas itself. Due to the slow natural diffusion efficiency of the flue gas and the uneven flow, the gas-phase oxidant in the absorption tower cannot fully contact with the flue gas, resulting in the nitric acid in the flue gas cannot be fully oxidized, resulting in a lower content of nitrogen dioxide flowing into the absorption tower and absorbed by the absorption liquid, and ultimately the denitrification effect of the flue gas becomes worse, which is obviously insufficient. Utility Model Content

[0005] In order to improve the denitrification effect on flue gas, the present application provides an incineration flue gas denitrification purification system.

[0006] The incineration flue gas denitrification purification system provided in this application adopts the following technical solution:

[0007] A combustion flue gas denitrification purification system comprises an oxidation tower and an absorption tower, wherein the oxidation tower and the absorption tower are connected via a connecting pipe, an exhaust pipe is provided at the top of the absorption tower, a main shaft and a plurality of secondary shafts are rotatably arranged in the oxidation tower, the main shaft is arranged at the center of the oxidation tower, a plurality of the secondary shafts are circumferentially evenly distributed on the outer peripheral side of the main shaft, a plurality of mixing rods are arranged on the main shaft and the plurality of the secondary shafts, and a rotating assembly for driving the main shaft and the secondary shaft to rotate synchronously is arranged in the oxidation tower.

[0008] By adopting the above technical solution, the rotating assembly drives the main shaft and multiple secondary shafts to rotate synchronously, and the rotation of the main shaft and the secondary shaft drives the mixing rod to rotate in the absorption tower. When the flue gas enters the absorption tower, the rotating mixing rod breaks the laminar flow state of the flue gas through mechanical force, and the flue gas is fully dispersed into the oxidation tower and fully contacts with the gas-phase oxidant. The gas-phase oxidant improves the oxidation effect of nitric oxide in the flue gas, and the nitric oxide is fully oxidized, thereby increasing the content of nitrogen dioxide in the flue gas flowing into the absorption tower, increasing the probability of nitrogen dioxide being absorbed by the absorption liquid, and thereby improving the denitrification effect of the flue gas.

[0009] Optionally, the rotating assembly includes a driving gear fixedly connected to the main shaft, a driven gear fixedly connected to the secondary shaft and meshing with the driving gear, the driving gear and the driven gear are slidably connected inside the oxidation tower, and a gear ring is provided on the inner circumferential side wall of the oxidation tower, and the gear ring is meshed with multiple driven gears.

[0010] By adopting the above technical solution, after the first motor is started, it drives the main shaft to rotate, the main shaft drives the driving gear to rotate, the driving gear drives the multiple meshing driven gears to rotate, and the driven gear drives the multiple secondary shafts to rotate synchronously. At the same time, under the setting of the ring gear, the driven gear will move along the circumference of the ring gear during the rotation process, and the movement of the driven gear drives the multiple secondary shafts to move along the inner peripheral side wall of the oxidation tower, and the inside of the oxidation tower is stirred in all directions during the movement. Such a setting further expands the range of action of the mixing rod, thereby further increasing the contact area between the flue gas and the gas-phase oxidant, and further improving the denitrification effect on the flue gas.

[0011] Optionally, a first baffle is fixedly connected to the main shaft, and the first baffle is rotatably arranged inside the oxidation tower. A second baffle is fixedly connected to the inner wall of the oxidation tower, and the surface of the second baffle is tightly fitted with the bottom surface of the first baffle. A plurality of first openings are opened on the first baffle, and a plurality of second openings are opened on the second baffle. When the main shaft is not rotating, the first openings and the second openings are staggered.

[0012] By adopting the above technical solution, during the rotation of the main shaft, the rotation of the main shaft drives the rotation of the second baffle. When the first port and the second port are not on the same straight line, the flow of the flue gas is blocked by the first baffle and the second baffle and cannot flow into the connecting pipe. When the first port and the second port are interconnected, the oxidized flue gas flows into the connecting pipe through the first port and the second port. Such an arrangement realizes the intermittent opening and blocking of the flue gas flow passage, thereby prolonging the reaction time of the flue gas and the gas-phase oxidant, further increasing the probability of nitric acid being oxidized, and further improving the denitrification effect of the flue gas.

[0013] Optionally, a spray assembly is provided in the absorption tower, and the spray assembly includes a liquid supply box arranged on the outer wall of the absorption tower, the liquid supply box is provided with a liquid supply pipe, the liquid supply pipe is provided with a liquid supply pump, the liquid outlet end of the liquid supply pipe extends to the interior of the absorption tower and is connected with a bellows, a plurality of liquid outlet pipes are connected with the bellows, a plurality of nozzles are provided on the liquid outlet pipe, the water outlet direction of the nozzles is arranged toward the interior of the absorption tower, and a moving assembly is provided in the absorption tower for driving the plurality of liquid outlet pipes to reciprocate along the length direction of the bellows.

[0014] By adopting the above technical scheme, the water pump is started to extract the absorption liquid in the liquid supply box into the liquid supply pipe. The absorption liquid flows through the liquid supply pipe and the bellows to the movable liquid outlet pipe, and is finally sprayed from the nozzle to the flue gas flowing from bottom to top. When the absorption liquid contacts the flue gas, it absorbs the nitrogen dioxide in the flue gas. The setting of the moving component enables the liquid outlet pipe to drive the nozzle to move back and forth in the absorption tower, and the spray range of the absorption liquid is expanded, thereby increasing the contact area between the absorption liquid and the flue gas, thereby increasing the probability of nitrogen dioxide in the flue gas being absorbed, thereby further improving the denitrification effect of the flue gas.

[0015] Optionally, the moving component includes a second motor arranged on the outer wall of the absorption tower, the output shaft of the second motor is fixedly connected to a driving shaft, the driving shaft is rotatably arranged inside the absorption tower, a reciprocating groove corresponding to a plurality of liquid outlet pipes is opened on the driving shaft, the reciprocating groove is composed of a left spiral groove and a right spiral groove connected end to end, a moving block is slidably connected to the reciprocating groove via a ball slider, and the moving block is arranged on the closed end face of the liquid outlet pipe.

[0016] By adopting the above technical solution, the second motor drives the driving shaft to rotate. During the rotation of the driving shaft, the moving block connected to the reciprocating groove through the sliding of the ball slider reciprocates along the reciprocating groove. The movement of the moving block drives the liquid outlet pipe to move, and the movement of the liquid outlet pipe drives the nozzle to move, thereby expanding the spray range of the absorption liquid and increasing the contact area between the absorption liquid and the flue gas.

[0017] Optionally, a demister is provided in the absorption tower, and the demister is composed of a plurality of wavy demister plates, a demister channel is formed between two adjacent demister plates, and the demister is arranged above the liquid outlet pipe.

[0018] By adopting the above technical solution, the flue gas will carry harmful droplets after being absorbed by the absorption liquid. When the flue gas carrying droplets flows to the demister, the flow direction of the flue gas is changed by the wavy demister plate. The droplets in the flue gas deviate from the flow direction of the flue gas under the action of inertia, and finally hit the demister plate and are separated. This setting reduces the content of harmful droplets in the flue gas after denitrification, ensuring that the discharged flue gas will not affect the atmosphere or subsequent flue gas treatment equipment.

[0019] Optionally, an anti-blocking component is provided in the absorption tower, and slide grooves are provided on opposite side walls of the absorption tower. The anti-blocking component gradually includes a slider slidably connected to the slide groove, and a connecting frame is provided on the two sliders. Brushes corresponding to the multiple defogger channels are provided on the connecting frame. A driving groove is provided on the inner side wall of one of the slide grooves, and a driving component for driving the connecting frame to reciprocate along the slide groove is provided in the driving groove. When the slider moves to the end face of the slide groove facing the defogger plate, the brush extends into the inside of the defogger channel.

[0020] By adopting the above technical solution, when the driving component drives the connecting frame to reciprocate along the slide groove, the connecting frame drives the brush to intermittently enter the defogger channel. In the process of the brush moving in the defogger channel, the brush will poke the particle deposits blocking the defogger channel out of the defogger channel, and at the same time, it can also puncture the condensed droplet film in the defogger channel. Such a setting reduces the possibility of the defogger channel being blocked and causing the flue gas to be unable to flow smoothly, thereby improving the defogger effect of the defogger.

[0021] Optionally, the driving assembly includes an incomplete gear rotatably connected to the driving groove, the toothed end of the incomplete gear is meshed with a rack plate, the rack plate is slidably connected to the driving groove, a spring is provided in the driving groove, one end of the spring is connected to the inner wall of the driving groove, and the other end is connected to the rack plate, when the spring is in a natural state, the brush is disengaged from the defogger channel, and a pulley is coaxially fixedly connected to the output shaft of the second motor and the incomplete gear, the pulley is rotatably connected to the outer wall of the absorption tower, and a belt is commonly sleeved on the outside of the pulley.

[0022] By adopting the above technical solution, the second motor drives the incomplete gear to rotate through the transmission action of the pulley and the belt. When the gear end of the incomplete gear engages with the rack plate, the incomplete gear drives the rack plate to move toward the defogger, the spring is stretched by the rack plate, the rack plate drives the connecting frame to move downward, and the brush enters the defogger channel. When the toothed end of the incomplete gear disengages from the rack plate, the tension on the spring disappears, the spring resets and pulls the rack plate upward, and the rack plate drives the connecting frame upward, thereby realizing the reciprocating motion of the connecting frame along the slide groove.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. The present application sets a main shaft, a secondary shaft, a mixing rod and a rotating assembly. The rotating assembly drives the mixing rod to rotate synchronously around the main shaft and the secondary shaft. The rotating mixing rod breaks the laminar flow state of the flue gas through mechanical force, and the flue gas is fully dispersed into the oxidation tower and fully contacts with the gas-phase oxidant. The gas-phase oxidant improves the oxidation effect of nitric oxide in the flue gas, and the nitric oxide is fully oxidized, thereby improving the denitrification effect of the flue gas;

[0025] 2. The present application sets up a driving component and an anti-blocking component. The driving component drives the brush in the anti-blocking component to intermittently enter the defogger channel. When entering the defogger channel, the brush pokes the blocked particle deposits out of the defogger channel, and at the same time punctures the condensed droplet film in the defogger channel. Such a setting reduces the possibility of blockage of the defogger channel causing the flue gas to be unable to flow smoothly, thereby improving the defogger effect of the defogger. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of this application.

[0027] Figure 2 It is a cross-sectional view of the oxidation tower in the embodiment of the present application.

[0028] Figure 3 It is a cross-sectional view of the absorption tower in the embodiment of the present application.

[0029] Figure 4 It is a cross-sectional view of the slide groove and the drive groove in the embodiment of the present application.

[0030] Description of the reference numerals: 1, oxidation tower; 2, absorption tower; 201, exhaust pipe; 3, connecting pipe; 4, spray assembly; 41, liquid supply box; 42, liquid supply pipe; 43, liquid supply pump; 44, bellows; 45, liquid outlet pipe; 46, nozzle; 5, main shaft; 6, secondary shaft; 7, mixing rod; 8, rotating assembly; 81, first motor; 82, driving gear; 83, driven gear; 84, gear ring; 9, first baffle; 91, first port; 10, second baffle; 1001, The second opening; 11. the moving component; 111. the second motor; 112. the driving shaft; 1121. the reciprocating groove; 113. the moving block; 12. the defogger; 121. the defog plate; 122. the defog channel; 13. the anti-blocking component; 131. the slider; 132. the connecting frame; 133. the brush; 14. the slide groove; 141. the driving groove; 15. the driving component; 151. the incomplete gear; 152. the rack plate; 153. the spring; 154. the pulley; 155. the belt. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-4 This application is described in further detail.

[0032] The embodiment of the present application discloses a combustion flue gas denitrification purification system.

[0033] Reference Figure 1 A denitrification purification system for incineration flue gas includes an oxidation tower 1 and an absorption tower 2. The air inlet end of the oxidation tower 1 is connected to the smoke exhaust pipe of the incineration system. The oxidation tower 1 is provided with an air connection pipe connected to a gas-phase oxidant. The bottom end of the oxidation tower 1 is connected with a connecting pipe 3. The air outlet end of the connecting pipe 3 is connected to the bottom end of the absorption tower 2. A spray assembly 4 for spraying absorption liquid is provided in the absorption tower 2. An exhaust pipe 201 is provided at the top of the absorption tower 2.

[0034] The flue gas generated by the incineration system enters the oxidation tower 1 and contacts and mixes with the gas-phase oxidant. The gas-phase oxidant oxidizes the nitrogen monoxide in the flue gas that is not easily absorbed by the absorption liquid into nitrogen dioxide. The oxidized flue gas enters the bottom of the absorption tower 2 through the connecting pipe 3. The flue gas contacts with the absorption liquid sprayed from the spray assembly 4 in the process of flowing from bottom to top. The alkaline substances in the absorption liquid react with the nitrogen dioxide in the flue gas to generate nitrates, thereby realizing denitrification of the flue gas. The denitrified flue gas continues to flow upward and is discharged from the exhaust pipe 201.

[0035] Reference Figure 1 and Figure 2 A main shaft 5 and a plurality of secondary shafts 6 are rotatably connected in the oxidation tower 1. In the present embodiment, there are three secondary shafts 6, wherein the main shaft 5 is arranged at the center of the oxidation tower 1, and the three secondary shafts 6 are equidistantly distributed circumferentially on the outer peripheral side of the main shaft 5. A plurality of mixing rods 7 are fixedly connected to the main shaft 5 and the secondary shaft 6, and a rotating assembly 8 is arranged in the oxidation tower 1.

[0036] Reference Figure 1 and Figure 2 The rotating assembly 8 includes a first motor 81 fixedly mounted on the top surface of the oxidation tower 1, the output shaft of the first motor 81 is coaxially fixedly connected to the main shaft 5, a driving gear 82 is fixedly connected to the side of the main shaft 5 close to the inner top wall of the oxidation tower 1, and driven gears 83 corresponding to the three secondary shafts 6 are meshed on the driving gear 82. The three driven gears 83 are respectively fixedly connected to the corresponding secondary shafts 6, and a gear ring 84 meshing with the three driven gears 83 is fixedly connected to the inner peripheral side wall of the oxidation tower 1. A support block is fixedly connected to one end of the secondary shaft 6 close to the inner top wall of the oxidation tower 1. An annular cavity that slides with the T-block is opened on the inner top wall of the oxidation tower 1, and the cross-section of the support block is T-shaped.

[0037] When the flue gas flows in the oxidation tower 1, the first motor 81 is started, and the first motor 81 drives the main shaft 5 to rotate, and the main shaft 5 drives the driving gear 82 to rotate, and the driving gear 82 drives the meshing multiple driven gears 83 to rotate, and the driven gear 83 drives the multiple secondary shafts 6 to rotate synchronously. At the same time, under the setting of the ring gear 84, the driven gear 83 will move circumferentially along the ring gear 84 during the rotation process, and the driven gear 83 drives the multiple secondary shafts 6 to move along the inner peripheral side wall of the oxidation tower 1. During the movement, the mixing rod 7 rotating around the secondary shaft 6 stirs the flue gas inside the oxidation tower 1 in all directions, and the laminar flow state of the flue gas flow is broken. The flue gas is fully dispersed into the oxidation tower 1 and fully contacts with the gas-phase oxidant. The gas-phase oxidant improves the oxidation effect of nitric oxide in the flue gas, and the nitric oxide is fully oxidized, thereby increasing the content of nitrogen dioxide in the flue gas flowing into the absorption tower 2, and increasing the probability of nitrogen dioxide being absorbed by the absorption liquid, thereby improving the denitrification effect of the flue gas.

[0038] Reference Figure 2 A first baffle 9 is fixedly connected to one end of the main shaft 5 close to the connecting pipe 3, and the outer peripheral side wall of the first baffle 9 is tightly fitted with the inner peripheral side wall of the oxidation tower 1. The first baffle 9 is rotatably connected to the inside of the oxidation tower 1, and a second baffle 10 is fixedly connected to the inner side wall of the oxidation tower 1, and the bottom surface of the second baffle 10 is tightly fitted with the bottom surface of the first baffle 9. The first baffle 9 and the second baffle 10 are both arranged above the air inlet end of the connecting pipe 3. A plurality of first openings 91 are opened on the first baffle 9, and a plurality of second openings 1001 are opened on the second baffle 10. When the main shaft 5 is not rotating, the first openings 91 and the second openings 1001 are alternately arranged.

[0039] During the rotation of the main shaft 5, the rotation of the main shaft 5 drives the second baffle 10 to rotate. When the first opening 91 and the second opening 1001 are not on the same straight line, the flue gas is blocked by the first baffle 9 after passing through the second opening 1001 and cannot continue to flow into the connecting pipe 3. When the first opening 91 and the second opening 1001 are interconnected, the oxidized flue gas flows into the connecting pipe 3 through the second opening 1001 and the first opening 91 in turn. This arrangement realizes the intermittent opening and blocking of the flue gas flow path, thereby prolonging the reaction time of the flue gas and the gas-phase oxidant, further increasing the probability of nitric acid being oxidized, and further improving the denitrification effect of the flue gas.

[0040] Reference Figure 1 and Figure 3The spray assembly 4 includes a liquid supply box 41 fixedly installed on the outer wall of the absorption tower 2, and alkaline absorption liquid is stored in the liquid supply box 41. A liquid supply pipe 42 is fixedly connected to the liquid supply box 41, and a liquid supply pump 43 is installed on the liquid supply pipe 42. The water inlet end of the liquid supply pipe 42 is connected to the inside of the liquid supply box 41, and the water outlet end extends into the inside of the absorption tower 2 and is connected to a bellows 44. The bellows 44 is connected to a plurality of liquid outlet pipes 45. In the present embodiment, the number of the liquid outlet pipes 45 is three, and the length direction of the liquid outlet pipes 45 is perpendicular to the length direction of the bellows 44. A plurality of nozzles 46 are installed on each of the liquid outlet pipes 45. The plurality of nozzles 46 are evenly distributed in the length direction of the liquid outlet pipes 45 at equal distances. The spraying direction of the nozzles 46 is arranged toward the inside of the absorption tower 2. A moving assembly 11 for driving the liquid outlet pipe 45 to reciprocate along the length direction of the bellows 44 is arranged in the absorption tower 2.

[0041] Reference Figure 1 and Figure 3 The moving component 11 includes a second motor 111 fixedly mounted on the outer wall of the absorption tower 2, the output shaft of the second motor 111 is fixedly connected to the driving shaft 112, the driving shaft 112 and the bellows 44 are respectively arranged on both sides of the absorption tower 2 perpendicular to the flue gas flow direction, the driving shaft 112 is rotatably arranged inside the absorption tower 2, and a reciprocating groove 1121 corresponding to three liquid outlet pipes 45 is opened on the driving shaft 112, the reciprocating groove 1121 is connected by a left spiral groove and a right spiral groove connected end to end, and a moving block 113 is slidably connected in the reciprocating groove 1121 through a ball slider 131, and the moving block 113 is fixedly connected to the closed end surface of the liquid outlet pipe 45.

[0042] The water pump and the second motor 111 are started synchronously, the second motor 111 drives the driving shaft 112 to rotate, the driving shaft 112 drives the reciprocating screw to rotate, the reciprocating screw drives the moving block 113 to reciprocate along the reciprocating groove 1121 through the ball slider 131, the movement of the moving block 113 drives the liquid outlet pipe 45 to move, the movement of the liquid outlet pipe 45 drives the nozzle 46 to move, and at the same time, the absorption liquid in the liquid supply tank 41 is pumped by the liquid supply pump 43 and moves to the liquid outlet pipe 45 through the liquid supply pipe 42 and the bellows 44, and the absorption liquid is finally sprayed from the moving nozzle 46 to the upward flowing flue gas. Such a configuration effectively increases the spray range of the absorption liquid, thereby increasing the contact area between the absorption liquid and the flue gas, and increasing the probability of nitrogen dioxide in the flue gas being absorbed, thereby further improving the denitrification effect of the flue gas.

[0043] Reference Figure 3A demister 12 is fixedly connected to the inside of the absorption tower 2. The demister 12 is arranged above the liquid outlet pipe 45. The demister 12 is composed of a plurality of wavy demister plates 121. A demister channel 122 is formed between two adjacent demister plates 121. When the flue gas flows upward, it passes through the curved demister channel 122. Harmful droplets in the flue gas deviate from the flow direction of the flue gas under the action of inertia, and finally hit the demister plate 121 and are separated. Such a setting reduces the content of harmful droplets in the flue gas after denitrification, and ensures that the discharged flue gas will not affect the atmosphere or subsequent flue gas treatment equipment.

[0044] Reference Figure 1 , Figure 3 and Figure 4 An anti-blocking component 13 is provided in the absorption tower 2, and slide grooves 14 are provided on the opposite side walls of the absorption tower 2. The anti-blocking component 13 includes a slider 131 slidably connected in the slide groove 14, and a connecting frame 132 is commonly connected to the two sliders 131. The connecting frame 132 is provided with brushes 133 corresponding to multiple defogger channels 122. The brushes 133 are made of flexible material. A driving groove 141 is provided on the inner side wall of one of the slide grooves 14. A driving component 15 for driving the connecting frame 132 to reciprocate along the length direction of the slide groove 14 is provided in the driving groove 141. When the slider 131 moves to the end face of the slide groove 14 facing the defogger plate 121, the brush 133 penetrates the inside of the defogger channel 122.

[0045] Reference Figure 1 , Figure 3 and Figure 4 The driving assembly 15 includes an incomplete gear 151 rotatably connected to the driving groove 141, a rack plate 152 is meshed at the toothed end of the incomplete gear 151, the rack plate 152 is slidably connected to the driving groove 141, a spring 153 is provided in the driving groove 141, one end of the spring 153 is fixedly connected to the inner wall of the driving groove 141, and the other end is fixedly connected to the rack plate 152. In the natural state of the spring 153, the slider 131 abuts against the end surface of the slide groove 14 away from the defogger plate 121, and a pulley 154 is coaxially fixedly connected to the output shaft of the second motor 111 and the incomplete gear 151, and a belt 155 is commonly sleeved on the outside of the pulley 154.

[0046] The second motor 111 drives the incomplete gear 151 to rotate through the transmission action of the pulley 154 and the belt 155. When the gear end of the incomplete gear 151 meshes with the rack plate 152, the incomplete gear 151 drives the rack plate 152 to move toward the defogger 12, and the spring 153 is stretched by the rack plate 152. The rack plate 152 drives the connecting frame 132 to move downward, and the connecting frame 132 drives the brush 133 to move in the defogger channel 122. During the movement, the brush 133 pokes the particle deposits blocked in the defogger channel 122 out of the defogger channel 122, and at the same time punctures the condensed droplet film in the defogger channel 122. When the toothed end of the incomplete gear 151 is separated from the rack plate 152, the tension on the spring 153 disappears, and the spring 153 resets to pull the rack plate 152 upward, and the rack plate 152 drives the connecting frame 132 to move upward.

[0047] The implementation principle of the incineration flue gas denitrification purification system of the present application embodiment is as follows: the flue gas generated by the incineration system enters the interior of the oxidation tower 1, the first motor 81 is started, the first motor 81 drives the main shaft 5 to rotate, the main shaft 5 drives the driving gear 82 to rotate, the driving gear 82 drives the meshing multiple driven gears 83 to rotate, the driven gear 83 drives the multiple secondary shafts 6 to rotate synchronously, and at the same time, under the setting of the ring gear 84, the driven gear 83 will move circumferentially along the ring gear 84 during the rotation process, and the driven gear 83 moves to drive the multiple secondary shafts 6 The mixing rod 7 moves along the inner peripheral side wall of the oxidation tower 1. During the movement, the mixing rod 7 rotating around the secondary shaft 6 stirs the flue gas inside the oxidation tower 1 in all directions. The laminar flow state of the flue gas is broken, and the flue gas is fully dispersed into the oxidation tower 1 and fully contacts the gas-phase oxidant. The gas-phase oxidant improves the oxidation effect of the nitric oxide in the flue gas, and the nitric oxide is fully oxidized. The fully oxidized flue gas flows to the connecting pipe 3 through the connected first port 91 and the second port 1001, and moves along the connecting pipe 3 to the absorption tower 2.

[0048] As the flue gas flows upward, it comes into countercurrent contact with the absorption liquid sprayed from the spray system. The alkaline substances in the absorption liquid react with the nitrogen dioxide in the flue gas to generate nitrates, thereby achieving denitrification of the flue gas. The denitrified flue gas continues to flow upward and is discharged from the exhaust pipe 201.

[0049] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An incineration flue gas denitration purification system, comprising an oxidation tower (1) and an absorption tower (2), wherein the oxidation tower (1) and the absorption tower (2) are connected via a connecting pipe (3), and an exhaust pipe (201) is provided at the top of the absorption tower (2), characterized in that: A main shaft (5) and a plurality of secondary shafts (6) are rotatably arranged in the oxidation tower (1); the main shaft (5) is arranged at the center of the oxidation tower (1); the plurality of secondary shafts (6) are evenly distributed circumferentially on the outer peripheral side of the main shaft (5); a plurality of mixing rods (7) are arranged on the main shaft (5) and the plurality of secondary shafts (6); and a rotating assembly (8) for driving the main shaft (5) and the secondary shafts (6) to rotate synchronously is arranged in the oxidation tower (1).

2. The incineration flue gas denitration purification system according to claim 1, characterized in that: The rotating assembly (8) comprises a driving gear (82) fixedly connected to the main shaft (5); a driven gear (83) meshing with the driving gear (82) is fixedly connected to the secondary shaft (6); the driving gear (82) and the driven gear (83) are slidably connected inside the oxidation tower (1); a gear ring (84) is provided on the inner peripheral side wall of the oxidation tower (1); the gear ring (84) meshes with a plurality of the driven gears (83).

3. The incineration flue gas denitration purification system according to claim 1, characterized in that: A first baffle (9) is fixedly connected to the main shaft (5), and the first baffle (9) is rotatably arranged inside the oxidation tower (1). A second baffle (10) is fixedly connected to the inner wall of the oxidation tower (1), and the surface of the second baffle (10) is tightly fitted with the bottom surface of the first baffle (9). The first baffle (9) is provided with a plurality of first openings (91), and the second baffle (10) is provided with a plurality of second openings (1001). When the main shaft (5) is not rotating, the first openings (91) and the second openings (1001) are staggered.

4. The incineration flue gas denitration purification system according to claim 1, characterized in that: A spray assembly (4) is arranged in the absorption tower (2), and the spray assembly (4) comprises a liquid supply box (41) arranged on the outer wall of the absorption tower (2), a liquid supply pipe (42) is arranged on the liquid supply box (41), a liquid supply pump (43) is arranged on the liquid supply pipe (42), a liquid outlet end of the liquid supply pipe (42) extends to the inside of the absorption tower (2) and is connected to a bellows (44), a plurality of liquid outlet pipes (45) are connected to the bellows (44), a plurality of spray heads (46) are arranged on the liquid outlet pipe (45), and the water outlet direction of the spray heads (46) is arranged toward the inside of the absorption tower (2), and a moving assembly (11) is arranged in the absorption tower (2) for driving the plurality of liquid outlet pipes (45) to reciprocate along the length direction of the bellows (44).

5. The incineration flue gas denitration purification system according to claim 4, characterized in that: The moving assembly (11) comprises a second motor (111) arranged on the outer wall of the absorption tower (2); a driving shaft (112) is fixedly connected to the output shaft of the second motor (111); the driving shaft (112) is rotatably arranged inside the absorption tower (2); a reciprocating groove (1121) corresponding to a plurality of liquid outlet pipes (45) is provided on the driving shaft (112); the reciprocating groove (1121) is composed of a left spiral groove and a right spiral groove connected end to end; a moving block (113) is slidably connected in the reciprocating groove (1121) via a ball slider (131); the moving block (113) is arranged on the closed end surface of the liquid outlet pipe (45).

6. The incineration flue gas denitration purification system according to claim 5, characterized in that: A demister (12) is arranged in the absorption tower (2). The demister (12) is composed of a plurality of wave-shaped demister plates (121). A demister channel (122) is formed between two adjacent demister plates (121). The demister (12) is arranged above the liquid outlet pipe (45).

7. The incineration flue gas denitration purification system according to claim 6, characterized in that: An anti-blocking component (13) is arranged in the absorption tower (2), and a slide groove (14) is provided on opposite side walls of the absorption tower (2). The anti-blocking component gradually includes a slider (131) slidably connected in the slide groove (14), and a connecting frame (132) is commonly provided on the two sliders (131). The connecting frame (132) is provided with brushes (133) corresponding to a plurality of the defogger channels (122) one by one. A driving groove (141) is provided on the inner side wall of one of the slide grooves (14), and a driving component (15) is provided in the driving groove (141) for driving the connecting frame (132) to reciprocate along the slide groove (14). When the slider (131) moves to the end face of the slide groove (14) facing the defogger plate (121), the brush (133) extends into the inside of the defogger channel (122).

8. The incineration flue gas denitration purification system according to claim 7, characterized in that: The driving assembly (15) comprises an incomplete gear (151) rotatably connected to the driving groove (141); a toothed end of the incomplete gear (151) is meshed with a rack plate (152); the rack plate (152) is slidably connected to the driving groove (141); a spring (153) is arranged in the driving groove (141); one end of the spring (153) is connected to the inner wall of the driving groove (141), and the other end is connected to the rack plate (152); when the spring (153) is in a natural state, the brush (133) is separated from the defogger passage (122); a pulley (154) is coaxially fixedly connected to the output shaft of the second motor (111) and the incomplete gear (151); the pulley (154) is rotatably connected to the outer wall of the absorption tower (2); and a belt (155) is provided on the outside of the pulley (154).

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