High-efficiency denitration device and denitration method for hazardous waste incineration flue gas

Abstract

The invention relates to the technical field of waste gas treatment, and discloses a hazardous waste incineration flue gas efficient denitration device and method.The hazardous waste incineration flue gas efficient denitration device comprises a first tower body, a top tray is fixedly installed at the top of the first tower body, a spraying box is arranged on the side face of the first tower body, and the output end of the spraying box communicates with a heat exchanger; the heat exchanger penetrates through the top tray and is communicated with the first tower body, a denitration mechanism, a driving mechanism and an adjusting mechanism are respectively arranged in the first tower body, a front deacidification pool is arranged below the first tower body, a mixer is arranged in the front deacidification pool, a plurality of spray valves are arranged at the top of the mixer, and the spray valves are communicated with the first tower body. The input end and the output end of the front deacidification pool are respectively communicated with a waste gas channel and a bag-type dust collector, the bag-type dust collector is communicated with the spraying box, and the denitration mechanism is arranged, so that the first catalyst bed is movably arranged, the side surface of the first catalyst bed is provided with a corresponding heat discharge port, and when the temperature of the first catalyst bed is high, the first catalyst bed is subjected to heat dissipation treatment.

Description

Technical Field

[0001] This invention relates to the field of waste gas treatment equipment technology, specifically to a high-efficiency denitrification device and method for hazardous waste incineration flue gas. Background Technology

[0002] Hazardous waste refers to waste that has one or more hazardous characteristics such as corrosivity, toxicity, flammability, reactivity or infectivity, and that can cause serious harm to the ecological environment and human health if not handled properly. It includes categories such as chemical waste residue, medical waste, sludge containing heavy metals, waste organic solvents, and incineration fly ash. This type of waste has a complex composition and is highly toxic, containing a large amount of acidic gas precursors such as HCl, HF, and SO2.

[0003] During denitrification, the catalytic bed, which is in contact with the exhaust gas generated from the incineration of hazardous waste, has a high degree of reaction and is more prone to high temperature. If not treated in time, it will reduce the subsequent denitrification efficiency. To address this, we propose a high-efficiency denitrification device and method for hazardous waste incineration flue gas to solve the above-mentioned defects. Summary of the Invention

[0004] The purpose of this invention is to provide a high-efficiency denitrification device and method for hazardous waste incineration flue gas, so as to solve the problems mentioned in the background art. To achieve the above objective, this invention provides the following technical solution: It includes a first tower body, a top plate fixedly installed on the top of the first tower body, a spray box arranged on the side of the first tower body, a heat exchanger connected to the output end of the spray box, the heat exchanger penetrating the top plate and communicating with the first tower body, and a denitrification mechanism, a driving mechanism, and an adjusting mechanism respectively arranged inside the first tower body;

[0005] The denitrification mechanism includes a second tower body disposed inside the first tower body. The diameter of the second tower body is smaller than that of the first tower body. Four heat exhaust ports are provided around and through the upper part of the second tower body. Baffles that are fixedly connected to the second tower body are provided below the heat exhaust ports. Positioning grooves are provided on both sides of the heat exhaust ports on the surface of the second tower body.

[0006] The second tower body has a mounting frame that is slidably installed inside. The surface of the mounting frame has an outlet that is adapted to the heat exhaust port. The mounting frame has several first catalyst beds that are arranged around it, corresponding to the outlets. A separator is provided on the mounting frame between every two outlets. The separator is located between every two first catalyst beds. A connecting ring is fixedly connected to the bottom of each first catalyst bed and the separator.

[0007] The mounting bracket has folding arms hinged around its bottom. A rotating shaft is fixedly connected to one bottom end of the folding arm. The rotating shaft is rotatably mounted on the second tower body. The rotating shaft passes through the second tower body and a control arm is fixedly connected to one end. The bottom side of the control arm abuts against the baffle. A torsion spring is provided at the end of the rotating shaft near the control arm.

[0008] A blocking ring is fixedly connected to the outer surface of the second tower body. The outer wall of the blocking ring is connected to the inner wall of the first tower body. A radiator is provided on the outer surface of the first tower body. The radiator is connected to the interior of the first tower body.

[0009] A second catalyst bed is provided at the bottom of the second tower body.

[0010] Preferably, the driving mechanism includes a mounting plate fixedly installed on the top of the second tower body, a diameter-changing chamber fixedly installed at the center of the mounting plate, a gas inlet penetrating through the bottom of the diameter-changing chamber, the gas inlet being correspondingly arranged with the first catalyst bed, a closing ring slidably connected to the inner surface of the diameter-changing chamber, a first force-bearing rod fixedly connected through the top of the closing ring through the mounting plate, and return springs movably sleeved on both sides of the bottom of the first force-bearing rod, the return springs being located at the top of the mounting plate.

[0011] Preferably, a blade is rotatably connected to the bottom of the inner surface of the diameter-changing chamber, the top of the blade passes through the mounting plate and is connected to a pulley assembly, and a drive motor is provided at the other end of the pulley assembly, and the blade is driven by the drive motor through the pulley assembly.

[0012] Preferably, a second force-bearing rod is provided above the mounting plate. The second force-bearing rod is slidably connected to the first tower body. A gravity ring is fixedly connected to the bottom of the second force-bearing rod. A dial wheel is rotatably installed around the bottom of the gravity ring. The dial wheel abuts against the side of the control arm opposite to the baffle.

[0013] Preferably, a sealing ring is fixedly installed between the bottom of the gravity ring and the dial wheel. The inner surface of the sealing ring is provided with a rubber strip that slides with the positioning groove. The rubber strip is used to seal the sealing ring with the second tower body and to open and close the heat exhaust port.

[0014] Preferably, a temperature detection ring is fixedly connected to the bottom of the diameter-changing chamber, and the temperature detection ring is located below the first catalyst bed.

[0015] Preferably, the adjustment mechanism includes a side bracket fixedly mounted on the mounting plate, a first coupling is rotatably mounted below the side bracket, the bottom of the first coupling meshes with one side of the bottom of the pulley assembly for being driven by the pulley assembly, a second coupling is mounted above the first coupling, a forward and reverse screw is slidably connected at the axis of the second coupling, and the bottom of the forward and reverse screw passes through the first coupling and is rotatably connected to the mounting plate.

[0016] Preferably, a sliding member is fixedly connected to the top of the second coupling through the side bracket, a hydraulic rod is provided on the top of the side bracket, the output shaft of the hydraulic rod is fixedly connected to the top side end of the sliding member, and a transmission frame is screwed to both sides of the forward and reverse screw respectively, and the two transmission frames abut against the first force rod and the second force rod respectively.

[0017] Preferably, a pre-desulfurization tank is provided below the first tower body, and a mixer is provided in the pre-desulfurization tank. Several spray valves are arranged on the top of the mixer. The input end and output end of the pre-desulfurization tank are respectively connected to an exhaust gas duct and a bag filter. The bag filter is connected to a spray box.

[0018] Preferably, a denitrification method for a high-efficiency denitrification device for hazardous waste incineration flue gas includes the following steps:

[0019] S1: Hazardous incineration exhaust gas is introduced into the exhaust duct and enters the mixer to narrow its flow space. Quicklime is sprayed into the mixer through the spray valve to react with HCl and HF components in the exhaust gas and remove them. The powder generated by the deacidification reaction enters the bag filter with the flue gas. The gas is then introduced into the spray box by the bag filter and enters the heat exchanger to heat the exhaust gas.

[0020] S2: The exhaust gas enters the reducer chamber, and the blades rotate continuously to turbulent the introduced exhaust gas, changing the flow path. It then comes into contact with and reacts with the first catalyst bed, reducing the impact on the catalyst bed. It then continues to flow downwards and reacts with the second catalyst bed.

[0021] S3: When the temperature of the first catalyst bed is higher than the set safety value, the hydraulic cylinder is activated and outputs downward, so that the second coupling engages with the first coupling, thereby causing the two transmission frames on the forward and reverse screws to move upward and downward simultaneously.

[0022] S4: The downward-moving transmission frame squeezes the first force-bearing rod, sealing the air inlet and stopping the outward flow of exhaust gas. Simultaneously, the second force-bearing rod is lifted by an upward-moving transmission frame, causing the rotating shaft to drive the folding arm on the other side to fold. After all four folding arms are folded, the output port of the mounting frame is connected to the heat dissipation port, and the fan built into the radiator is started to dissipate heat from the first catalyst bed.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] In this invention, the first catalyst bed is movable by a denitrification mechanism, and a corresponding heat dissipation port is opened on the side to dissipate heat when the catalyst bed is at high temperature.

[0025] In this invention, through the set drive mechanism and adjustment mechanism, when the catalyst bed is at high temperature, the two force rods are driven upward and downward respectively by the engagement of the first coupling and the second coupling. One control is to block the gas inlet with the closed ring to stop the output of waste gas, and the other control is to raise the gravity ring to open the heat exhaust port, so that the output port of the mounting frame is aligned with the heat exhaust port, and the heat sink is used to dissipate heat from the first catalyst bed, thereby improving the operating efficiency.

[0026] In this invention, the exhaust gas is mixed and swirled out by the blades, and the flow direction of the exhaust gas is changed, thereby changing the situation where the exhaust gas directly hits the catalyst bed and reducing the degree of pulverization of the catalyst bed caused by this. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the cross-sectional structure of the first tower body of the present invention;

[0029] Figure 3 This is a schematic diagram of the cross-sectional structure of the second tower body of the present invention;

[0030] Figure 4 This is a schematic diagram of the structure of the second tower body and the heat exhaust port of the present invention;

[0031] Figure 5 This is a schematic diagram of the mounting frame and the first catalyst bed of the present invention;

[0032] Figure 6 This is a schematic diagram of the drive mechanism of the present invention;

[0033] Figure 7 This is a schematic diagram of the modified diameter chamber and air guide port of the present invention;

[0034] Figure 8 This is a schematic diagram of the structure of the dial and control arm of the present invention;

[0035] Figure 9 This is a schematic diagram of the structure of the folding arm, rotating shaft, and control arm of the present invention;

[0036] Figure 10 For the present invention Figure 6 Enlarged structural diagram of region A in the middle;

[0037] Figure 11 This is a schematic diagram of the structure of the first coupling and the forward and reverse lead screw of the present invention.

[0038] In the diagram: 1. First tower body; 2. Top plate; 3. Spray box; 4. Heat exchanger; 5. Denitrification mechanism; 501. Second tower body; 502. Heat exhaust port; 503. Baffle; 504. Positioning groove; 505. Mounting bracket; 506. Output port; 507. First catalyst bed; 508. Separator; 509. Connecting ring; 510. Folding arm; 511. Rotating shaft; 512. Control arm; 513. Torsion spring; 514. Blocking ring; 515. Radiator; 516. Second catalyst bed; 6. Drive mechanism; 601. Mounting plate; 602. Diameter adjustment chamber; 603. Gas guide port; 604. 605. Closed ring; 606. Blade; 607. First force-bearing rod; 608. Return spring; 609. Pulley assembly; 610. Drive motor; 611. Second force-bearing rod; 612. Gravity ring; 613. Dial wheel; 614. Sealing ring; 615. Rubber strip; 616. Temperature detection ring; 7. Adjustment mechanism; 701. Side mount; 702. First coupling; 703. Second coupling; 704. Forward and reverse screw; 705. Sliding component; 706. Hydraulic cylinder; 707. Conductor frame; 8. Pre-acidification tank; 9. Mixer; 10. Spray valve; 11. Exhaust gas duct; 12. Baghouse dust collector. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] Please see Figures 1 to 11 The present invention provides a technical solution: including a first tower body 1, a top plate 2 fixedly installed on the top of the first tower body 1, a spray box 3 provided on the side of the first tower body 1, a heat exchanger 4 connected to the output end of the spray box 3, the heat exchanger 4 passing through the top plate 2 and communicating with the first tower body 1, and a denitrification mechanism 5, a driving mechanism 6 and an adjusting mechanism 7 respectively provided inside the first tower body 1.

[0041] The denitrification mechanism 5 includes a second tower body 501 disposed inside the first tower body 1. The diameter of the second tower body 501 is smaller than the diameter of the first tower body 1. Four heat exhaust ports 502 are provided around and through the upper part of the second tower body 501. Baffles 503 fixedly connected to the second tower body 501 are provided below the heat exhaust ports 502. Positioning grooves 504 are provided on both sides of the heat exhaust ports 502 on the surface of the second tower body 501.

[0042] The second tower body 501 has a mounting frame 505 slidably installed inside. The surface of the mounting frame 505 has an outlet 506 that is adapted to the heat exhaust port 502. The mounting frame 505 has several first catalyst beds 507 that are corresponding to the outlets 506 arranged around it. A separator 508 is provided on the mounting frame 505 between every two outlets 506. The separator 508 is located between every two first catalyst beds 507. A connecting ring 509 is fixedly connected to the bottom of each first catalyst bed 507 and the separator 508.

[0043] The bottom of the mounting bracket 505 is hinged with folding arms 510. One end of the bottom of the folding arm 510 is fixedly connected to a rotating shaft 511. The rotating shaft 511 is rotatably mounted on the second tower body 501. The rotating shaft 511 passes through the second tower body 501 and one end is fixedly connected to a control arm 512. The bottom side of the control arm 512 abuts against the baffle 503. A torsion spring 513 is provided at the end of the rotating shaft 511 near the control arm 512.

[0044] A blocking ring 514 is fixedly connected to the outer surface of the second tower body 501. The outer wall of the blocking ring 514 is connected to the inner wall of the first tower body 1. A radiator 515 is provided on the outer surface of the first tower body 1. The radiator 515 is connected to the interior of the first tower body 1.

[0045] A second catalyst bed 516 is provided at the lower part of the second tower body 501;

[0046] The drive mechanism 6 includes a mounting plate 601 fixedly installed on the top of the second tower body 501. A diameter-changing chamber 602 is fixedly installed at the center of the mounting plate 601. A gas guide port 603 is opened through the bottom of the diameter-changing chamber 602. The gas guide port 603 is correspondingly arranged with the first catalyst bed 507. A sealing ring 604 is slidably connected to the inner surface of the diameter-changing chamber 602. A first force-bearing rod 606 is fixedly connected through the mounting plate 601 to the top of the sealing ring 604. Return springs 607 are movably sleeved on both sides of the bottom of the first force-bearing rod 606. The return springs 607 are located at the top of the mounting plate 601.

[0047] A blade 605 is rotatably connected to the bottom of the inner surface of the diameter-changing chamber 602. The top of the blade 605 passes through the mounting plate 601 and is connected to a pulley set 608. A drive motor 609 is provided at the other end of the pulley set 608. The blade 605 is driven by the drive motor 609 through the pulley set 608.

[0048] In this embodiment, the exhaust gas first enters the diameter-changing chamber 602. At this time, the sealing ring 604 is in the raised state, and the bottom air guide port 603 is open. When the exhaust gas flows, the blades 605 are continuously rotated by the pulley group 608, which turbulently introduces the exhaust gas, so that the flow path changes from vertical flow to horizontal swirling flow during the downward flow. Thus, it is evenly discharged through the air guide port 603, and comes into contact with and reacts with the corresponding first catalyst bed 507, reducing the impact on the catalyst bed. After passing through the first catalyst bed 507, the exhaust gas continues to flow downward and reacts with the second catalyst bed 516.

[0049] A second force-bearing rod 610 is provided above the mounting plate 601. The second force-bearing rod 610 is slidably connected to the first tower body 1. A gravity ring 611 is fixedly connected to the bottom of the second force-bearing rod 610. A dial wheel 612 is rotatably installed around the bottom of the gravity ring 611. The dial wheel 612 abuts against the side of the control arm 512 relative to the baffle 503.

[0050] A sealing ring 613 is fixedly installed between the bottom of the gravity ring 611 and the dial 612. The inner surface of the sealing ring 613 is provided with a rubber strip 614 that slides with the positioning groove 504. The rubber strip 614 is used to seal the sealing ring 613 with the second tower body 501 and to open and close the heat exhaust port 502.

[0051] A temperature detection ring 615 is fixedly connected to the bottom of the diameter-changing chamber 602, and the temperature detection ring 615 is located below the first catalyst bed 507;

[0052] The adjustment mechanism 7 includes a side bracket 701 fixedly mounted on the mounting plate 601. A first coupling 702 is rotatably mounted below the side bracket 701. The bottom of the first coupling 702 meshes with one side of the bottom of the pulley group 608 and is driven by the pulley group 608. A second coupling 703 is mounted above the first coupling 702. A forward and reverse screw 704 is slidably connected at the shaft of the second coupling 703. The bottom of the forward and reverse screw 704 passes through the first coupling 702 and is rotatably connected to the mounting plate 601.

[0053] The top of the second coupling 703 is fixedly connected to the slide 705 through the side bracket 701. The top of the side bracket 701 is provided with a hydraulic rod. The output shaft of the hydraulic rod is fixedly connected to the top side of the slide 705. The two sides of the forward and reverse screw 704 are respectively screwed with the transmission frame 707. The two transmission frames 707 abut against the first force rod 606 and the second force rod 610 respectively.

[0054] In this embodiment, when the temperature of the first catalyst bed 507 is higher than the set safety value during denitrification, the first catalyst bed 507 is cooled, the hydraulic cylinder 706 is activated and outputs downward, driving the sliding member 705 and the second coupling 703 to move downward. The second coupling 703 engages with the first coupling 702, so that during the rotation of the first coupling 702, the forward and reverse screw 704 is rotated through the second coupling 703, thereby causing the two transmission frames 707 on the forward and reverse screw 704 to move upward and downward simultaneously.

[0055] In this embodiment, the downward-moving transmission frame 707 compresses the first force-bearing rod 606, causing it to compress the return spring 607 and push the closing ring 604 downward to the bottom of the diameter-changing chamber 602, sealing the air inlet 603 and stopping the outward flow of exhaust gas. At the same time, the second force-bearing rod 610 is lifted by the upward-moving transmission frame 707, causing the gravity ring 611 to move upward. The gravity ring 611 causes the dial wheels 612 around the bottom to gradually move away from the side of the control arm 512. After the control arm 512 swings ninety degrees to the side, the dial wheels 612 stop moving. During the swing of arm 512, the rotating shaft 511 drives the folding arm 510 on the other side to fold. After all four folding arms 510 are folded, the horizontal height of the mounting frame 505 and the first catalyst bed 507 decreases. The output port 506 of the mounting frame 505 is connected to the heat exhaust port 502. The sealing ring 613 is opened synchronously during the rise of the gravity ring 611. After the sealing ring 613 is opened, the drive motor 609 stops running. At this time, the fan built into the radiator 515 is started to absorb the heat in the first tower body 1 and perform heat dissipation operation on the first catalyst bed 507.

[0056] In this embodiment, gears are provided on the bottom of the first coupling 702 and on the pulley of the pulley group 608. The pulley group 608 drives the first coupling 702 to rotate through gear meshing. The first coupling 702 is not connected to the forward and reverse screw 704.

[0057] Below the first tower body 1, there is a pre-desulfurization tank 8. Inside the pre-desulfurization tank 8, there is a mixer 9. Several spray valves 10 are arranged on the top of the mixer 9. The input and output ends of the pre-desulfurization tank 8 are respectively connected to the exhaust gas duct 11 and the bag filter 12. The bag filter 12 is connected to the spray box 3.

[0058] In this embodiment, during the denitrification process, hazardous incineration exhaust gas is introduced from the exhaust gas duct 11. The exhaust gas first enters the pre-deacidification tank 8 and then enters the mixer 9 to narrow its flow space, thereby increasing the exhaust gas content in the mixer 9. Subsequently, quicklime is sprayed into the mixer 9 through the spray valve 10. The quicklime reacts with and removes the HCl and HF components in the exhaust gas. The powder generated by the deacidification reaction enters the bag filter 12 with the flue gas and is collected by the filter bags. The flue gas is then introduced into the spray box 3 from the bag filter 12, sprayed with ammonia water, and then enters the heat exchanger 4 to heat the exhaust gas to reach the temperature required for denitrification. The exhaust gas then passes through the first tower 1 and enters the second tower 501.

[0059] The method of use and advantages of the present invention: The denitrification method of the high-efficiency denitrification device for hazardous waste incineration flue gas operates as follows:

[0060] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 As shown:

[0061] S1: Hazardous incineration exhaust gas is introduced into the exhaust duct 11 and enters the mixer 9 to narrow its flow space. Quicklime is sprayed into the mixer 9 through the spray valve 10 to react with the HCl and HF components in the exhaust gas and remove them. The powder generated by the deacidification reaction enters the bag filter 12 with the flue gas. The gas is then introduced into the spray box 3 from the bag filter 12 and enters the heat exchanger 4 to heat the exhaust gas.

[0062] S2: The exhaust gas enters the diameter-changing chamber 602. The blades 605 rotate continuously to turbulent the introduced exhaust gas, changing the flow path. It comes into contact with and reacts with the corresponding first catalyst bed 507, reducing the impact on the catalyst bed. Then it continues to flow downwards and reacts with the second catalyst bed 516.

[0063] S3: When the temperature of the first catalyst bed 507 is higher than the set safety value, the hydraulic cylinder 706 is activated and outputs downward, so that the second coupling 703 engages with the first coupling 702, thereby causing the two transmission frames 707 on the forward and reverse screw 704 to move upward and downward simultaneously.

[0064] S4: The downward-moving transmission frame 707 squeezes the first force rod 606 and seals the air inlet 603, stopping the outward flow of exhaust gas. Simultaneously, the second force rod 610 is lifted by the upward-moving transmission frame 707, causing the rotating shaft 511 to drive the folding arm 510 on the other side to fold. After all four folding arms 510 are folded, the output port 506 of the mounting frame 505 is connected to the heat exhaust port 502, and the fan built into the radiator 515 is started to dissipate heat from the first catalyst bed 507.

[0065] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency denitrification device for hazardous waste incineration flue gas, characterized in that, The first tower body (1) is provided with a top plate (2) fixedly installed on the top of the first tower body (1), a spray box (3) is provided on the side of the first tower body (1), and a heat exchanger (4) is connected to the output end of the spray box (3). The heat exchanger (4) passes through the top plate (2) and is connected to the first tower body (1). The first tower body (1) is provided with a denitrification mechanism (5), a driving mechanism (6) and an adjusting mechanism (7) respectively. The denitrification mechanism (5) includes a second tower body (501) disposed inside the first tower body (1). The diameter of the second tower body (501) is smaller than the diameter of the first tower body (1). The upper part of the second tower body (501) is provided with four heat exhaust ports (502) that are circumferentially and penetratingly provided. Below the heat exhaust ports (502), there are baffles (503) that are fixedly connected to the second tower body (501). The surface of the second tower body (501) is provided with positioning grooves (504) on both sides of the heat exhaust ports (502). The second tower body (501) is slidably provided with a mounting frame (505). The surface of the mounting frame (505) is provided with an outlet (506). The outlet (506) is adapted to the heat exhaust port (502). The mounting frame (505) is surrounded by several first catalyst beds (507) corresponding to the outlets (506). A separator (508) is provided on the mounting frame (505) between every two outlets (506). The separator (508) is located between every two first catalyst beds (507). A connecting ring (509) is fixedly connected to the bottom of each first catalyst bed (507) and the separator (508). The mounting bracket (505) has folding arms (510) hinged around its bottom. A rotating shaft (511) is fixedly connected to one end of the bottom of the folding arm (510). The rotating shaft (511) is rotatably mounted on the second tower body (501). The rotating shaft (511) passes through the second tower body (501) and a control arm (512) is fixedly connected to one end. The bottom side of the control arm (512) abuts against the baffle (503). A torsion spring (513) is provided at one end of the rotating shaft (511) near the control arm (512). A blocking ring (514) is fixedly connected to the outer surface of the second tower body (501). The outer wall of the blocking ring (514) is connected to the inner wall of the first tower body (1). A radiator (515) is provided on the outer surface of the first tower body (1). The radiator (515) is connected to the interior of the first tower body (1). The lower part of the second tower body (501) is provided with a second catalyst bed (516).

2. The high-efficiency denitrification device for hazardous waste incineration flue gas according to claim 1, characterized in that: The drive mechanism (6) includes a mounting plate (601) fixedly installed on the top of the second tower body (501). A diameter-changing chamber (602) is fixedly installed at the center of the mounting plate (601). A gas inlet (603) is opened through the bottom of the diameter-changing chamber (602). The gas inlet (603) is correspondingly arranged with the first catalyst bed (507). A closing ring (604) is slidably connected to the inner surface of the diameter-changing chamber (602). A first force-bearing rod (606) is fixedly connected through the mounting plate (601) to the top of the closing ring (604). Return springs (607) are movably sleeved on both sides of the bottom of the first force-bearing rod (606). The return springs (607) are located at the top of the mounting plate (601).

3. The high-efficiency denitrification device for hazardous waste incineration flue gas according to claim 2, characterized in that: The bottom of the inner surface of the diameter-changing chamber (602) is rotatably connected to a blade (605). The top of the blade (605) passes through the mounting plate (601) and is connected to a pulley assembly (608). The other end of the pulley assembly (608) is provided with a drive motor (609). The blade (605) is driven by the drive motor (609) through the pulley assembly (608).

4. The high-efficiency denitrification device for hazardous waste incineration flue gas according to claim 2, characterized in that: A second force-bearing rod (610) is provided above the mounting plate (601). The second force-bearing rod (610) is slidably connected to the first tower body (1). A gravity ring (611) is fixedly connected to the bottom of the second force-bearing rod (610). A dial wheel (612) is rotatably installed around the bottom of the gravity ring (611). The dial wheel (612) abuts against the side of the control arm (512) relative to the baffle (503).

5. The high-efficiency denitrification device for hazardous waste incineration flue gas according to claim 4, characterized in that: A sealing ring (613) is fixedly installed between the bottom of the gravity ring (611) and the dial wheel (612). The inner surface of the sealing ring (613) is provided with a rubber strip (614) that slides with the positioning groove (504). The rubber strip (614) is used to seal the sealing ring (613) with the second tower body (501) and to open and close the heat exhaust port (502).

6. The high-efficiency denitrification device for hazardous waste incineration flue gas according to claim 2, characterized in that: A temperature detection ring (615) is fixedly connected to the bottom of the diameter-changing chamber (602), and the temperature detection ring (615) is located below the first catalyst bed (507).

7. The high-efficiency denitrification device for hazardous waste incineration flue gas according to claim 1, characterized in that: The adjustment mechanism (7) includes a side bracket (701) fixedly mounted on the mounting plate (601). A first coupling (702) is rotatably mounted below the side bracket (701). The bottom of the first coupling (702) meshes with one side of the bottom of the pulley group (608) and is driven by the pulley group (608). A second coupling (703) is mounted above the first coupling (702). A forward and reverse screw (704) is slidably connected at the axis of the second coupling (703). The bottom of the forward and reverse screw (704) passes through the first coupling (702) and is rotatably connected to the mounting plate (601).

8. The high-efficiency denitrification device for hazardous waste incineration flue gas according to claim 7, characterized in that: The top of the second coupling (703) is fixedly connected to the side bracket (701) and the slide (705). The top of the side bracket (701) is provided with a hydraulic rod. The output shaft of the hydraulic rod is fixedly connected to the top side of the slide (705). The two sides of the forward and reverse screw (704) are respectively screwed with a transmission frame (707). The two transmission frames (707) abut against the first force rod (606) and the second force rod (610) respectively.

9. The high-efficiency denitrification device for hazardous waste incineration flue gas according to claim 1, characterized in that: A pre-desulfurization tank (8) is provided below the first tower body (1). A mixer (9) is provided inside the pre-desulfurization tank (8). Several spray valves (10) are arranged on the top of the mixer (9). The input end and output end of the pre-desulfurization tank (8) are respectively connected to an exhaust gas duct (11) and a bag filter (12). The bag filter (12) is connected to the spray box (3).

10. The denitrification method of a high-efficiency denitrification device for hazardous waste incineration flue gas according to any one of claims 1-9, characterized in that, Includes the following steps: S1: The waste gas duct (11) introduces the waste gas from the incineration of hazardous materials. It enters the mixer (9) to narrow its flow space. Quicklime is sprayed into the mixer (9) through the spray valve (10) to react with the HCl and HF components in the waste gas and remove them. The powder generated by the deacidification reaction enters the bag filter (12) with the flue gas. The gas is introduced into the spray box (3) from the bag filter (12) and enters the heat exchanger (4) to heat the waste gas. S2: The exhaust gas enters the diameter-changing chamber (602), and the blades (605) continuously rotate to turbulent the introduced exhaust gas, changing the flow path. It comes into contact with and reacts with the corresponding first catalyst bed (507), reducing the impact on the catalyst bed. Then it continues to flow downward and reacts with the second catalyst bed (516). S3: When the temperature of the first catalyst bed (507) is higher than the set safety value, the hydraulic cylinder (706) is activated and outputs downward, so that the second coupling (703) engages with the first coupling (702), thereby causing the two transmission frames (707) on the forward and reverse screw (704) to move upward and downward simultaneously. S4: The downward-moving transmission frame (707) squeezes the first force rod (606) and seals the air inlet (603), stopping the outward flow of exhaust gas. Simultaneously, the second force rod (610) is lifted by an upward-moving transmission frame (707), causing the rotating shaft (511) to drive the folding arm (510) on the other side to fold. After all four folding arms (510) are folded, the output port (506) of the mounting frame (505) is connected to the heat dissipation port (502), and the fan built into the radiator (515) is started to dissipate heat from the first catalyst bed (507).

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