A mist and dust removal device for coke oven gas purification pretreatment

Abstract

The present invention relates to the technical field of coke oven gas purification and treatment, and discloses a coke oven gas purification pretreatment device for removing fog and dust, which includes a body. A first gas transmission pump and a second gas transmission pump are fixedly arranged on the top of the body. The output end of the first gas transmission pump is fixedly connected with an intake pipeline through a flange. An integrated dust and fog removal component is arranged in the cavity of the body. The integrated dust and fog removal component includes a conical exhaust part, a vertical part fixedly connected with the exhaust part, and a liquid storage part fixedly connected with the vertical part. The outer wall of the exhaust part is fixedly installed on the inner wall of the body through a bracket. Through the arranged integrated dust and fog removal component, the present invention can achieve multi-stage purification treatment of coke oven gas containing fog and dust, including diversion collision and coagulation, electrostatic dust removal, solidification of dust in a reagent solution, and foam physical filtration, and can overall improve the pretreatment purification efficiency of the gas.

Description

Technical Field

[0001] The present invention belongs to the technical field of coke oven gas purification and treatment. Specifically, it relates to a coke oven gas purification pretreatment device for removing fog and dust. Background Art

[0002] Coke oven gas, as a by-product of the coking industry, contains complex pollutants such as dust, tar, fog droplets, and hydrogen sulfide, and needs to be efficiently pretreated before entering subsequent processes such as desulfurization. In the prior art, the pretreatment of coke oven gas generally adopts single or combined processes such as multi-stage physical filtration, wet washing, or electrostatic dust removal, but there are still problems such as low purification efficiency, easy blockage of equipment, and high maintenance costs.

[0003] The patent with the publication number CN117683572A discloses a coke oven gas water washing and spraying dust removal device, which includes a vertical tower body, a vortex water washing mixer, a support, a Venturi acceleration and turbulence mechanism, a secondary spraying pipe, and a demister. The support is arranged on the side wall at the lower end of the inner cavity of the vertical tower body, the vortex water washing mixer is arranged on the support, the Venturi acceleration and turbulence mechanism is arranged above the vortex water washing mixer, the secondary spraying pipe is arranged above the Venturi acceleration and turbulence mechanism, and the demister is arranged above the secondary spraying pipe.

[0004] The above technical solution mainly adopts the method of spray water washing, which has limited removal effect on micron-sized dust and tar fog droplets, and does not combine deep treatment means such as chemical coagulation or electrostatic adsorption, making it difficult to meet the pretreatment requirements of high-purity gas; and tar is easily adhered to the surface of the equipment during the water washing process, and it is necessary to frequently stop the machine for cleaning; the Venturi structure is easily blocked due to the deposition of particulate matter in the flow channel, resulting in high maintenance costs. Therefore, there is an urgent need for a coke oven gas purification pretreatment device for removing fog and dust to solve the above problems.

[0005] In view of this, the present invention is specifically proposed. Summary of the Invention

[0006] To solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0007] A coke oven gas purification pretreatment device for removing fog and dust includes a machine body. A first gas transmission pump and a second gas transmission pump are fixedly arranged at the top of the machine body. The output end of the first gas transmission pump is fixedly connected to an intake pipeline through a flange, and an integrated dust and fog removal component is arranged in the cavity of the machine body;

[0008] The integrated dust and fog removal component includes a conical exhaust part, a vertical part fixedly connected to the exhaust part, and a liquid storage part fixedly connected to the vertical part. The outer wall of the exhaust part is fixedly installed with the inner wall of the machine body through a bracket. Both sides of the liquid storage part are fixedly connected with bending parts. The upper ends of the two bending parts are fixedly connected with guide parts. The guide parts on both sides respectively penetrate through the corresponding sides of the exhaust part and extend into the cavity of the exhaust part. The other ends of the two guide parts are fixedly connected together to form a gas guide cover. The top end of the gas guide cover is fixedly connected with the top wall surface of the cavity of the exhaust part. A gas transmission cover is fixedly installed at the top of the exhaust part. The gas transmission cover is in a horn shape and is communicated with the gas guide cover. An air inlet is opened at the center position of the top of the machine body. The output end of the air inlet pipe is fixedly connected to the top position of the machine body through a flange. The air inlet pipe is communicated with the air inlet. Reagent adding pipes and exhaust pipes are respectively fixedly installed on the top sides of both sides of the exhaust part. Solenoid valves are installed in both the reagent adding pipes and the exhaust pipes, and both the reagent adding pipes and the exhaust pipes fixedly penetrate through the top wall surface of the machine body. The input end of the second air transmission pump is connected to the exhaust pipe through a flange. The fixedly penetrating parts of the two guide parts and the exhaust part are in a sealed state. The tops of the two guide parts are fixedly connected to form an inverted V shape. The bending part is in an S shape, and the connection part between the bending part and the corresponding guide part on one side is also sealed. The connection part between the liquid storage part and the two bending parts is also in a sealed state. The connection part between the liquid storage part and the vertical part is also in a sealed state. A flow guiding structure for continuously changing the air flow trend is arranged in the cavities of the two guide parts.

[0009] The flow guiding structure includes multiple groups of flow guiding vanes fixedly arranged on the side walls of the guide parts. The flow guiding vanes on both sides in the cavity of the guide part are distributed in a staggered state. The flow guiding vanes are in an arc shape. The air flow passes through the flow guiding vanes on both sides in an S shape. The connection part between the flow guiding vane on the side far from the vertical part and the guide part is in an inward concave arc state. The connection part between the flow guiding vane on the side close to the vertical part and the guide part is in an inclined straight state.

[0010] Multiple groups of electrostatic dust removal units are arranged in the bending parts on both sides. The electrostatic dust removal unit includes an electrostatic dust removal ball with a hollow metal shell. The electrostatic dust removal ball is movably arranged in the cavity of the bending part. There is a certain gap between the electrostatic dust removal ball and the inner wall of the bending part. A star-shaped radial electrode is fixedly installed at the central axis of the electrostatic dust removal ball. Air channels are arranged along both sides in the cavity of the bending part of the electrostatic dust removal ball. The air flow enters the electrostatic dust removal ball through one air channel and then exits through the other air channel. Multiple groups of dust collecting electrodes are fixedly arranged on the inner wall of the electrostatic dust removal ball. The dust collecting electrodes are in an S shape. Vibration motors for controlling the vibration of the electrostatic dust removal balls are fixedly installed on the outer walls of the two bending parts through brackets. A shielding shell is arranged outside the vibration motors. The output shaft of the vibration motor penetrates through the wall surface of the bending part through a socket bearing and a sealing ring. The connection part between the bending part and the vibration motor is in a sealed state.

[0011] As a preferred embodiment of the present invention, a multifunctional stirring structure is provided in the cavities of the liquid storage part and the vertical part. The multifunctional stirring structure includes a servo motor fixedly installed in the cavity of the exhaust part through a bracket. A protective housing is arranged outside the servo motor. A rotating rod vertically downward is fixedly provided at the output end of the servo motor. A protective sleeve is movably installed on the outer wall below the rotating rod. The protective sleeve is fixedly connected to the inner wall of the vertical part through a bracket. A wire mesh demister is fixedly provided at the middle inner wall of the cavity of the vertical part. The protective sleeve and the rotating rod penetrate through the wire mesh demister; a plurality of connecting structures are arranged at the bottom of the rotating rod. The other ends of the connecting structures are commonly fixedly connected to a cam disc. The cam disc is hollow; sealing blocks are fixedly installed on the inner walls at the joints of the liquid storage part and the bending parts on both sides. The sealing blocks are arc-shaped bodies. The positions of the sealing blocks correspond to those of the cam disc; a plurality of air guide channels are opened on each sealing block. The air guide channels are in a horn shape. The side of the air guide channel close to the rotating rod is in a state where the inner diameter gradually decreases. A silicon carbide coating is fixedly provided on the inner wall of the air guide channel. Air guide rods are movably installed in the cavities of the air guide channels. The air guide rods are also in a horn shape. The minimum diameter ends of the air guide rods are fixedly connected to driving rods. The driving rods on each side are commonly movably connected to a turning plate. A rotating shaft rod penetrates through the center position of the turning plate. The rotating shaft rod is fixedly installed on the inner wall of the liquid storage part. The turning plate can perform a turning motion through the rotating shaft rod. A first spring is sleeved on the outer wall of the driving rod located above on each side. The cam disc intermittently rotates and presses against the upper outer walls of the two turning plates.

[0012] As a preferred embodiment of the present invention, the bottom of the rotating rod is located at an eccentric position in the cavity of the cam disc. Each connecting structure includes two connecting plates. The connecting plates are arc-shaped bodies. The connecting plates are fixedly installed between the outer wall at the bottom of the rotating rod and the inner wall of the cam disc. A plurality of stirring parts are movably arranged between the two connecting plates. The stirring part includes a stirring plate body. Sliding grooves are opened on the side walls of the two connecting plates close to each other. Sliders are fixedly provided at the positions of the stirring plate body close to the two sliding grooves. The sliders are slidably installed in the sliding grooves. Air bags are fixedly installed on the side walls of adjacent two stirring plate bodies close to and away from each other. A plurality of telescopic plates that can slide through a piston are movably installed on the outer wall of the stirring plate body. The outer wall of the telescopic plate is in a conical shape. The stirring plate body is in a hollow state. The stirring plate body is communicated with the air bag. The cavities of the stirring plate body and the air bag form a sealed space. Second springs are fixedly installed on the air bags between adjacent two stirring plate bodies. Second springs are also fixedly installed between the air bag of the outermost stirring plate body and the inner wall of the cam disc and the wall surface of the rotating rod. The length of the stirring plate body close to the rotating rod side gradually decreases.

[0013] As a preferred embodiment of the present invention, the bottom of the liquid storage part is in a downward conical state, a sewage discharge pipe is fixedly arranged at the conical bottom of the liquid storage part, and an electromagnetic valve is arranged in the sewage discharge pipe; an annular liquid accumulation pipe is fixed at the bottom wall surface of the cavity of the machine body, the sewage discharge pipe extends into the liquid accumulation pipe, a sewage discharge main pipe is fixedly arranged at the bottom of the liquid accumulation pipe, the sewage discharge main pipe is located below the bottom wall surface of the machine body, an electromagnetic valve is arranged at the bottom of the sewage discharge main pipe, a ring-shaped second cleaning disc is fixedly arranged on the upper side of the inner wall of the liquid accumulation pipe, a second cleaning pipe is fixedly arranged on one side wall surface of the second cleaning disc, and the second cleaning pipe penetrates through the wall surface of the machine body.

[0014] As a preferred embodiment of the present invention, a ring-shaped third cleaning disc is fixed on the outer wall of the middle part of the air delivery hood, a third cleaning pipe is fixedly arranged on the top wall surface of one side of the third cleaning disc, the third cleaning pipe penetrates through the top wall surface of the machine body, a plurality of groups of jet pipes corresponding to the position of the third cleaning disc are fixedly arranged on the inner wall of the middle part of the air delivery hood, the jet pipes are communicated with the third cleaning disc, electromagnetic valves are assembled in the jet pipes, and the jet pipes are inclined towards the diversion parts on both sides.

[0015] As a preferred embodiment of the present invention, a ring-shaped first cleaning disc is also fixedly arranged at the inner wall position of the exhaust part, a plurality of groups of injection pipes along the inner wall direction of the exhaust part are fixedly arranged at the bottom of the first cleaning disc, a first cleaning pipe is fixedly arranged at the top of one side of the first cleaning disc, an electromagnetic valve is installed in the first cleaning pipe, the first cleaning pipe fixedly penetrates through the side wall surface of the exhaust part and the penetration part is sealed, and the other end of the first cleaning pipe also penetrates through the side wall of the machine body.

[0016] The present invention has the following beneficial effects compared with the prior art:

[0017] 1. Through the provided integrated dust and fog removal assembly, the present invention can realize multi-stage purification treatment of coke oven gas containing fog and dust, including diversion collision condensation, electrostatic dust removal, dust coagulation in the reagent solution, and foam physical filtration, which can overall improve the pretreatment and purification efficiency of the gas.

[0018] 2. With the diversion structure set in the present invention, the fog droplets, dust, or tar droplets contained in the flue gas will continuously contact or collide with the diversion vanes under the guiding action of the air flow, enabling the collided liquids to gradually coagulate together, thereby improving the efficiency of capturing fog droplets, dust, and tar droplets.

[0019] 3. The diversion vanes provided in the present invention are in a concave arc state at the connection between the diversion vanes on the side away from the vertical part and the diversion part. Such a setting is to facilitate the smooth downward sliding of the condensed droplets. The connection between the diversion vanes on the side close to the vertical part and the diversion part is in an inclined straight state. Such a design is also to facilitate the downward sliding of the droplets. The surface of the diversion vanes is coated with silicon carbide, which can reduce corrosion, reduce tar adhesion, and facilitate later flushing and maintenance.

[0020] 4. Through the electrostatic dust removal unit provided in the present invention, after the coke oven gas containing fog and dust enters the air duct, the charged particles approach the dust collecting electrode under the action of the electric field force and finally adsorb on the dust collecting electrode. The vibration motor drives the electrostatic dust removal ball to vibrate slightly, which can enable the upward flowing air to better enter the air duct. The dust collecting electrode during swinging can also increase the contact efficiency and contact area with the air flow, thereby improving the electrostatic dust removal efficiency of the flue gas to a certain extent.

[0021] 5. Through the electrostatic dust removal unit provided in the present invention, during the subsequent injection of water or reagent for cleaning and maintenance, the appropriate vibration of the vibration motor can accelerate the dropping of the dust particles on the dust collecting electrode. Combined with the flushing of the water body, the water body can be made to shake to a certain extent inside the electrostatic dust removal ball. The shaking water body can impact back and forth, and the impact can better flush the dust collecting electrode, improving the efficiency of later maintenance and cleaning.

[0022] 6. Through the multifunctional stirring structure provided in the present invention, the air flow passing through the bending part will be compressed and injected into the liquid storage part. The cam disk intermittently reciprocally presses the two side turning plates, enabling the air flow to continuously turn into bubbles through the air guide channel. After the air flow turns into bubbles, it continuously enters the PAM solution. The dust particles or tar droplets in the air flow will continuously coagulate with the CPAM solution, forming larger particulate matters remaining in the CPAM solution, thereby realizing the purification treatment of the flue gas.

[0023] 7. Through the multifunctional stirring structure provided in the present invention, the cam disk mixes and stirs the PAM solution and siloxane in the cavity of the liquid storage part to a certain extent. When the bubbles rise from the bottom of the cavity of the liquid storage part, the surface of the bubbles adsorbs siloxane molecules, forming a "gas-liquid-siloxane" three-phase interface. After the bubbles reach the liquid surface, the siloxane molecules accumulate on the liquid surface, forming a foam layer. The bubbles generated on the liquid can filter the gas rising from the bottom again. The bubbles can further capture particles and tar, thereby further improving the treatment efficiency of the flue gas.

[0024] 8. The silicon carbide coating is provided to reduce the problems of tar adhesion and blockage. During the later maintenance and when using water for cleaning, the water flowing from top to bottom carries the previously cleaned particulate matter and tar and flows downward. By continuously squeezing the flip plate, the particulate matter and tar can pass through the air duct. When the particulate matter blocks the air duct, through the continuous reciprocating motion of the air guide rod, it can be extruded, thus avoiding blockage and improving the flow efficiency of the cleaning water or reagent. The material of the silicon carbide coating itself can minimize the problem of tar adhesion and also improve the overall later maintenance efficiency.

[0025] 9. When the rotating rod drives the cam disk to rotate through multiple sets of connection structures, under the action of centrifugal force, the stirring plate body moves toward the side away from the rotating rod, causing two adjacent stirring plate bodies to approach each other, and the airbag is compressed by the second spring. At this time, the telescopic plate on the stirring plate body is compressed, which causes the telescopic plate to further extend. The extended telescopic plate can increase the contact area with the liquid, so that the bubbles can be better mixed with the CPAM solution or silicone. Therefore, by appropriately adjusting the working speed of the servo motor, the extension length of the telescopic plate can be adjusted to meet the gas treatment selection in different situations.

[0026] The following further describes in detail the specific embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In the drawings:

[0028] Figure 1 is the overall three-dimensional view of the present invention;

[0029] Figure 2 is the cross-sectional view of the body of the present invention;

[0030] Figure 3 is the present invention Figure 2 magnified view at A in;

[0031] Figure 4 is the present invention Figure 2 magnified view at B in;

[0032] Figure 5 is the present invention Figure 2 magnified view at C in;

[0033] Figure 6 is the present invention Figure 2 magnified view at D in;

[0034] Figure 7 is the present invention Figure 6 magnified view at E in;

[0035] Figure 8 is the present invention Figure 2Enlarged view at position F in the [Chinese context];

[0036] Figure 9 This is for the present invention Figure 2 Enlarged view at position G in the [Chinese context];

[0037] Figure 10 This is the three - dimensional view of the integrated dust and fog removal component of the present invention;

[0038] Figure 11 This is the three - dimensional view of the cam disk of the present invention;

[0039] Figure 12 This is the three - dimensional view of the connection structure of the present invention;

[0040] Figure 13 This is the three - dimensional view of the stirring plate body and the connecting plate of the present invention;

[0041] Figure 14 This is the cross - sectional view of the stirring plate body of the present invention.

[0042] In the figure: 10, the machine body; 11, the first air delivery pump; 12, the air inlet pipeline; 13, the air inlet; 14, the second air delivery pump; 15, the exhaust pipeline; 16, the reagent addition pipeline; 17, the first cleaning pipeline; 18, the second cleaning pipeline; 19, the second cleaning disk; 20, the sewage main pipe; 21, the liquid accumulation pipe; 22, the first cleaning disk; 23, the third cleaning disk; 24, the third cleaning pipeline; 25, the spray pipe; 26, the sewage discharge pipe; 27, the liquid storage part; 31, the exhaust part; 32, the vertical part; 33, the bending part; 34, the diversion part; 35, the air guide cover; 36, the air delivery cover; 37, the diversion vane; 38, the electrostatic dust removal ball; 39, the star - shaped radial electrode; 40, the air duct; 41, the dust collecting electrode; 42, the vibration motor; 43, the blocking block; 44, the air guide channel; 45, the air guide rod; 46, the silicon carbide coating; 47, the driving rod; 48, the first spring; 49, the flipping plate; 50, the cam disk; 51, the servo motor; 52, the rotating rod; 53, the protective sleeve; 54, the connecting plate; 55, the sliding groove; 56, the slider; 57, the air bag; 58, the telescopic plate; 59, the second spring; 60, the stirring plate body; 61, the wire mesh demister. Detailed implementation manners

[0043] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments in conjunction with the accompanying drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention.

[0044] A coke oven gas purification and pretreatment dust and fog removal device, as Figure 1 , Figure 2 , Figure 10As shown in the figure, it includes a body 10. A first air delivery pump 11 and a second air delivery pump 14 are fixedly installed on the top of the body 10. The output end of the first air delivery pump 11 is fixedly connected to an air inlet pipe 12 through a flange. An integrated dust and fog removal component is arranged in the cavity of the body 10. The integrated dust and fog removal component includes a conical exhaust part 31, a vertical part 32 fixedly connected to the exhaust part 31, and a liquid storage part 27 fixedly connected to the vertical part 32. The outer wall of the exhaust part 31 is fixedly installed on the inner wall of the body 10 through a bracket. Both sides of the liquid storage part 27 are fixedly connected with bending parts 33. The upper ends of the two bending parts 33 are fixedly connected with diversion parts 34. The two diversion parts 34 respectively penetrate through the corresponding two sides of the exhaust part 31 and extend into the cavity of the exhaust part 31. The other ends of the two diversion parts 34 are fixedly connected together to form a gas guide cover 35. The top end of the gas guide cover 35 is fixedly connected to the inner top wall surface of the exhaust part 31. A gas delivery cover 36 is fixedly installed on the top of the exhaust part 31. The gas delivery cover 36 is in a horn shape and is communicated with the gas guide cover 35. An air inlet 13 is opened at the center position of the top of the body 10. The output end of the air inlet pipe 12 is fixedly connected to the top position of the body 10 through a flange. The air inlet pipe 12 is communicated with the air inlet 13. A reagent addition pipe 16 and an exhaust pipe 15 are respectively fixedly installed on the two top sides of the exhaust part 31. Solenoid valves are installed in both the reagent addition pipe 16 and the exhaust pipe 15, and both the reagent addition pipe 16 and the exhaust pipe 15 fixedly penetrate through the top wall surface of the body 10. The input end of the second air delivery pump 14 is connected to the exhaust pipe 15 through a flange. The penetration parts where the two diversion parts 34 are fixedly connected to the exhaust part 31 are in a sealed state. The top parts of the two diversion parts 34 are fixedly connected to form an inverted V shape. The bending part 33 is in an S shape. The connection part between the bending part 33 and the corresponding diversion part 34 on one side is also sealed. The connection part between the liquid storage part 27 and the two bending parts 33 is also in a sealed state. The connection part between the liquid storage part 27 and the vertical part 32 is also in a sealed state. Diversion structures for continuously changing the air flow trend are arranged in the cavities of the two diversion parts 34.

[0045] Specifically, the coke oven gas containing fog and dust is cooled and then injected into the intake pipeline 12 by the first gas transmission pump 11. At the same time, the working switch of the second gas transmission pump 14 is turned on. When the second gas transmission pump 14 operates, the second gas transmission pump 14 sucks air through the exhaust pipeline 15. The exhaust pipeline 15 sucks air through the exhaust part 31. The gas enters the gas transmission hood 36 through the air inlet 13, and then enters the gas guiding hood 35 through the gas transmission hood 36. After entering the gas guiding hood 35, it can enter the two-sided diversion parts 34 and move inside. It should be noted that the cavity of the exhaust part 31 and the cavity of the gas guiding hood 35 are separated and not connected. The overall structure composed of the exhaust part 31, the vertical part 32, the bending part 33, the diversion part 34, and the gas guiding hood 35 of this device is similar to the structure of a "Klein bottle"; after the gas enters the two-sided diversion parts 34, it will enter the two-sided bending parts 33, and finally enter the liquid storage part 27, then enter the vertical part 32, and finally enter the exhaust part 31 and be sucked away. It should be noted that the output end of the second gas transmission pump 14 is connected to other tail gas treatment equipment, and the pretreated gas processed by this device is further transported to other treatment devices for treatment.

[0046] As Figure 2 , Figure 3 , Figure 10 shown, the bottom of the liquid storage part 27 is in a downward conical state. A sewage discharge pipe 26 is fixedly installed at the conical bottom of the liquid storage part 27, and an electromagnetic valve is configured in the sewage discharge pipe 26; an annular liquid accumulation pipe 21 is fixed on the inner bottom wall surface of the cavity of the machine body 10. The sewage discharge pipe 26 extends into the liquid accumulation pipe 21. A sewage discharge main pipe 20 is fixedly installed at the bottom of the liquid accumulation pipe 21. The sewage discharge main pipe 20 is located below the bottom wall surface of the machine body 10, and an electromagnetic valve is configured at the bottom of the sewage discharge main pipe 20. An annular second cleaning disc 19 is fixedly installed on the upper side of the inner wall of the liquid accumulation pipe 21. A second cleaning pipe 18 is fixedly installed on one side wall surface of the second cleaning disc 19, and the second cleaning pipe 18 penetrates the wall surface of the machine body 10. A third cleaning disc 23 is fixedly installed on the outer wall of the middle part of the gas transmission hood 36. A third cleaning pipe 24 is fixedly installed on the top wall surface of one side of the third cleaning disc 23, and the third cleaning pipe 24 penetrates the top wall surface of the machine body 10. A plurality of jet pipes 25 corresponding to the position of the third cleaning disc 23 are fixedly installed on the inner wall of the middle part of the gas transmission hood 36. The jet pipes 25 are communicated with the third cleaning disc 23, and electromagnetic valves are assembled in the jet pipes 25. The jet pipes 25 are inclined towards the two-sided diversion parts 34. An annular first cleaning disc 22 is also fixedly installed at the inner wall position of the exhaust part 31. A plurality of injection pipes along the inner wall direction of the exhaust part 31 are fixedly installed at the bottom of the first cleaning disc 22. A first cleaning pipe 17 is fixedly installed on the top of one side of the first cleaning disc 22, and an electromagnetic valve is installed in the first cleaning pipe 17. The first cleaning pipe 17 fixedly penetrates the side wall surface of the exhaust part 31 and the penetration part is sealed. The other end of the first cleaning pipe 17 also penetrates the side wall of the machine body 10.

[0047] Specifically, open the solenoid valve of the reagent addition pipeline 16. The input end of the reagent addition pipeline 16 can be connected to a CPAM solution addition device or a siloxane addition device, specifically as follows:

[0048] Add a certain amount of CPAM solution into the exhaust part 31 through the reagent addition pipeline 16. The CPAM solution flows along the inner wall of the exhaust part 31 into the vertical part 32 and finally converges in the liquid storage part 27. When the coke oven gas containing fog and dust enters the CPAM solution, dust coagulation will occur. Small droplets and dust will coalesce into large particles, so that the large particles will remain in the CPAM solution, thus realizing the filtration of the gas. After adding the CPAM solution, add a certain amount of siloxane into the exhaust part 31 through the reagent addition pipeline 16. The siloxane can be polydimethylsiloxane. After the gas treatment is completed, the liquid can be discharged into the liquid accumulation pipe 21 by opening the solenoid valve in the sewage discharge pipe 26 and finally discharged through the sewage discharge main pipe 20. The setting of the second cleaning disc 19 and the second cleaning pipeline 18 can facilitate the spraying and cleaning of the inner wall of the liquid accumulation pipe 21.

[0049] Similarly, the setting of the third cleaning disc 23, the third cleaning pipeline 24, and the jet pipe 25 is to connect the input end of the third cleaning pipeline 24 to the water outlet of the water pump every time after the gas treatment is completed. The water pump injects clean water or reagent solution into the jet pipe 25 under high pressure. Open the solenoid valve in the jet pipe 25, and the clean water or reagent solution can be sprayed out through the jet pipe 25. Spray through the jet pipe 25 into the diversion parts 34 on both sides to wash away and flush pollutants such as particulate matter, impurities, dirt, and tar through high pressure, and then enter the bending part 33 for flushing. After flushing, it can also be discharged through the liquid storage part 27.

[0050] Similarly, the setting of the first cleaning disc 22, the injection pipe, and the first cleaning pipeline 17 is also for the cleaning and maintenance of the entire device. After the pretreatment of the flue gas, connect the input end of the first cleaning pipeline 17 to the pump body as well. The pump body injects clean water or reagent solution into the first cleaning pipeline 17 under high pressure. Spray downward along the inner wall of the exhaust part 31 through the injection pipe at the bottom of the first cleaning disc 22. The high-pressure water body scours the inner wall of the exhaust part 31, and at the same time, it will flow downward along the inner wall of the vertical part 32. Finally, the water body enters the liquid storage part 27 for flushing. After the flushing is completed, it can also be discharged through the sewage discharge pipe 26.

[0051] Such as Figure 2 and Figure 4As shown, the flow guiding structure includes multiple groups of flow guiding vanes 37 fixedly arranged on the two side walls of the flow guiding part 34. The flow guiding vanes 37 on both sides inside the cavity of the flow guiding part 34 are distributed in a staggered state. The flow guiding vanes 37 are arc-shaped. The air flow passes through the flow guiding vanes 37 on both sides in an S-shaped state. The connection part between the flow guiding vane 37 on the side far from the vertical part 32 and the flow guiding part 34 is in a concave arc state, and the connection part between the flow guiding vane 37 on the side close to the vertical part 32 and the flow guiding part 34 is in an inclined straight state.

[0052] Specifically, the coke oven gas containing fog and dust enters the arc-shaped flow guiding part 34 and will flow downward along the staggered flow guiding vanes 37. Under the guiding action of the air flow, the fog droplets, dust or tar droplets contained in the flue gas will continuously contact or collide with the flow guiding vanes 37, so that the collided liquids can slowly coagulate together, improving the efficiency of capturing fog droplets, dust and tar droplets. At the same time, the connection part between the flow guiding vane 37 on the side far from the vertical part 32 and the flow guiding part 34 is in a concave arc state, such a setting is to facilitate the condensed droplets to slide down smoothly, and the connection part between the flow guiding vane 37 on the side close to the vertical part 32 and the flow guiding part 34 is in an inclined straight state, such a design is also to facilitate the droplets to slide down. The surface of the flow guiding vane 37 is coated with silicon carbide, which can reduce corrosion and also reduce tar adhesion, facilitating later flushing and maintenance.

[0053] As Figure 2 , Figure 5 , Figure 10 shown, multiple groups of electrostatic dust removal units are arranged in both of the bending parts 33 on both sides. The electrostatic dust removal unit includes an electrostatic dust removal ball 38 with a hollow metal shell. The electrostatic dust removal ball 38 is movably arranged in the cavity of the bending part 33. There is a certain gap between the electrostatic dust removal ball 38 and the inner wall of the bending part 33. A star-shaped radial electrode 39 is fixedly installed at the central axis of the electrostatic dust removal ball 38. Air channels 40 are opened at both sides of the cavity of the bending part 33 along the electrostatic dust removal ball 38. The air flow enters the electrostatic dust removal ball 38 through the air channel 40 at one end and then discharges from the air channel 40 at the other end. Multiple groups of dust collecting electrodes 41 are fixedly arranged on the inner wall of the electrostatic dust removal ball 38. The dust collecting electrodes 41 are S-shaped. Vibration motors 42 for controlling the vibration of the electrostatic dust removal ball 38 are fixedly installed on the outer walls of both bending parts 33 through brackets. A shielding shell is arranged outside the vibration motors 42. The output shafts of the vibration motors 42 penetrate the wall surface of the bending part 33 through socket bearings and sealing rings. The connection part between the bending part 33 and the vibration motors 42 is in a sealed state.

[0054] During use, after the preliminary treatment by the above-mentioned diversion part 34, the flue gas will continue to flow downward. The flue gas will enter the electrostatic precipitation ball 38 through the air duct 40 along the bending part 33. Turn on the working switch of the vibration motor 42. The vibration frequency of the vibration motor 42 is adjustable. The vibration motor 42 will drive the electrostatic precipitation ball 38 to swing slightly. Turn on the working switch of the star-shaped radial electrode 39. After the coke oven gas containing fog and dust enters the air duct 40, the charged particles approach the dust collecting electrode 41 under the action of the electric field force and finally adsorb on the dust collecting electrode 41. It should be noted that at this time, the amplitude of the vibration motor 42 driving the electrostatic precipitation ball 38 to vibrate is small, so as to avoid the problem of the dust particles adsorbed on the dust collecting electrode 41 shaking and falling. At the same time, for the air duct 40 opened on the electrostatic precipitation ball 38, one end of the air duct 40 is for air inlet, and the other end is for air outlet, and the air ducts 40 at both ends need to be in a corresponding state, and the smoothness of the air flow needs to be ensured. At the same time, when the electrostatic precipitation ball 38 swings slightly, it can make the air flow flowing downward from above enter the air duct 40 better. The dust collecting electrode 41 during swinging can also increase the contact efficiency and contact area with the air flow, so as to improve the electrostatic precipitation efficiency of the flue gas to a certain extent.

[0055] It should be further noted that during the subsequent injection of water or reagent for cleaning and maintenance, it is necessary to disconnect the working switch of the star-shaped radial electrode 39 and turn on the working switch of the vibration motor 42. At this time, increase the vibration frequency of the vibration motor 42. In this way, the vibration motor 42 drives the electrostatic precipitation ball 38 to vibrate at a certain frequency, which can accelerate the falling of the dust particles on the dust collecting electrode 41. At the same time, in cooperation with the flushing of the water body, the water body can be made to shake to a certain extent inside the electrostatic precipitation ball 38. The water body during shaking can collide back and forth, and when colliding, it can better wash the dust collecting electrode 41 and improve the efficiency of later maintenance and cleaning.

[0056] Such as Figure 2 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 、 Figure 11 、 Figure 12 、 Figure 13As shown, a multi-functional stirring structure is provided in the cavities of the liquid storage part 27 and the vertical part 32. The multi-functional stirring structure includes a servo motor 51 fixedly installed in the cavity of the exhaust part 31 through a bracket. A protective housing is arranged outside the servo motor 51. A vertically downward rotating rod 52 is fixedly provided at the output end of the servo motor 51. A protective sleeve 53 is movably installed on the outer wall below the rotating rod 52. The protective sleeve 53 is fixedly connected with the inner wall of the vertical part 32 through a bracket. A wire mesh demister 61 is fixedly provided at the inner wall of the middle part of the cavity of the vertical part 32. The protective sleeve 53 and the rotating rod 52 penetrate through the wire mesh demister 61; a plurality of connecting structures are arranged at the bottom of the rotating rod 52, and the other ends of the connecting structures are fixedly connected together with a cam disc 50. The cam disc 50 is hollow; sealing blocks 43 are fixedly installed on the inner walls at the joints of the liquid storage part 27 and the two bending parts 33 on both sides. The sealing blocks 43 are arc-shaped bodies, and the positions of the sealing blocks 43 correspond to those of the cam disc 50; a plurality of air guide channels 44 are formed in each of the sealing blocks 43 on both sides. The air guide channels 44 are in a horn shape. The side of the air guide channel 44 close to the rotating rod 52 is in a state where the inner diameter gradually decreases. A silicon carbide coating 46 is fixedly provided on the inner wall of the air guide channel 44. Air guide rods 45 are movably installed in the cavities of the air guide channels 44. The air guide rods 45 are also in a horn shape. The minimum diameter ends of the air guide rods 45 are fixedly connected with driving rods 47. The driving rods 47 on each side are jointly movably connected with a turning plate 49. A rotating shaft rod movably penetrates through the center position of the turning plate 49. The rotating shaft rod is fixedly arranged on the inner wall of the liquid storage part 27. The turning plate 49 can perform a turning motion through the rotating shaft rod. A first spring 48 is sleeved on the outer wall of each of the driving rods 47 located above. The cam disc 50 intermittently rotates and presses against the upper outer walls of the two turning plates 49.

[0057] During use, after adding PAM solution and silicone into the cavity of the liquid storage part 27, the switch of the servo motor 51 is turned on. When the servo motor 51 is working, the servo motor 51 drives the rotating rod 52 to rotate. The rotating rod 52 drives the cam plate 50 to rotate through the connecting structure. The cam plate 50 mixes and stirs the PAM solution and silicone in the cavity of the liquid storage part 27 to a certain extent. At the same time, the airflow passing through the curved portion 33 is compressed and injected into the liquid storage part 27. When the airflow passes through the air guide channel 44, it is converted into bubbles. The cam plate 50 intermittently squeezes the flip plates 49 on both sides back and forth. When squeezing and pushing the upper side of the flip plates 49, the upper air guide rod 45 pushes outward to open the upper air guide channel 44. The lower air guide rod 45 moves toward one side of the cavity of the liquid storage part 27. The airflow passes through the air guide channel 44 and is then pushed by the air guide rod 45. When the cam plate 50 and one side After the flip plate 49 contacts and separates, the elastic force of the first spring 48 causes the upper air guide rod 45 to move toward one side of the cavity of the liquid storage part 27. Under the action of this reciprocating cycle, the air flow can continuously pass through the air guide channel 44 and turn into bubbles. After the air flow turns into bubbles, it continuously enters the PAM solution. The dust particles or tar droplets in the air flow will continuously condense with the CPAM solution to form larger particles that remain in the CPAM solution, thereby achieving purification of the flue gas.

[0058] At the same time, when the bubbles rise from the bottom of the cavity of the liquid storage part 27, the surface of the bubbles adsorbs silicone molecules to form a "gas-liquid-silicone" three-phase interface. After the bubbles reach the liquid surface, the silicone molecules accumulate on the liquid surface to form a foam layer. Due to the hydrophobicity and elastic membrane effect of silicone, the foam can exist stably for several minutes to tens of minutes. The bubbles generated on the liquid can filter the gas rising from the bottom again, and the bubbles can further capture particles and tar, thereby further improving the treatment efficiency of the flue gas.

[0059] At the same time, the wire mesh demister 61 is provided to block the bubbles when there are too many bubbles. At the same time, the upward airflow will pass through the wire mesh demister 61 and prevent the airflow from carrying foam upward.

[0060] It's worth noting that during operation, CPAM solution and siloxane need to be replenished regularly. As the foam rises, it can carry CPAM solution with it, leading to reagent loss. The presence of a wire mesh demister 61 minimizes CPAM solution loss. The siloxane concentration can range from 0.01% to 0.08%, preferably 0.05%, as excess siloxane can encapsulate CPAM molecules, reducing coagulation efficiency.

[0061] Further, the silicon carbide coating 46 is provided to reduce the problems of tar adhesion and blockage. During later maintenance and when cleaning with water, the water flowing from top to bottom carries the previously cleaned particulate matter and tar downward. By continuously squeezing the flip plate 49, the particulate matter and tar can pass through the air guide channel 44. When the particulate matter blocks the air guide channel 44, through the continuous reciprocating motion of the air guide rod 45, it can be extruded, thus avoiding blockage and improving the flow efficiency of the cleaning water or reagent. The material of the silicon carbide coating 46 itself can minimize the problem of tar adhesion.

[0062] Meanwhile, after the bubbles are generated, the agitation of the cam disk 50 enables the bubbles to better mix with the CPAM solution and also better mix with the siloxane, improving the overall working efficiency.

[0063] As Figure 11 、 Figure 12 、 Figure 13 、 Figure 8 、 Figure 14 and Figure 6 As shown, the bottom of the rotating rod 52 is located at an eccentric position within the cavity of the cam disk 50. Each connecting structure includes two connecting plates 54. The connecting plates 54 are arc-shaped bodies. The connecting plates 54 are fixedly installed between the outer wall of the bottom of the rotating rod 52 and the inner wall of the cam disk 50. A plurality of groups of stirring parts are movably arranged between the two connecting plates 54. The stirring part includes a stirring plate body 60. Sliding grooves 55 are formed on the side walls of the two connecting plates 54 close to each other. Sliders 56 are fixedly provided at positions of the stirring plate body 60 close to the two sliding grooves 55. The sliders 56 are slidably installed in the sliding grooves 55. Air bags 57 are fixedly installed on the side walls of adjacent two stirring plate bodies 60 close to and away from each other. A plurality of groups of telescopic plates 58 that can slide through the piston are movably installed on the outer wall of the stirring plate body 60. The outer wall of the telescopic plate 58 is conical. The stirring plate body 60 is in a hollow state. The stirring plate body 60 is communicated with the air bag 57. The cavities of the stirring plate body 60 and the air bag 57 form a sealed space. Second springs 59 are fixedly installed on the air bags 57 between adjacent two stirring plate bodies 60. Second springs 59 are also fixedly installed between the air bag 57 of the outermost stirring plate body 60 and the inner wall of the cam disk 50 and the wall surface of the rotating rod 52. The length of the stirring plate body 60 on the side close to the rotating rod 52 gradually decreases.

[0064] During use, the rotation speed of the servo motor 51 can be adjusted. When the rotating rod 52 drives the cam disc 50 to rotate through multiple sets of connection structures, under the action of centrifugal force, the stirring plate body 60 moves towards the side away from the rotating rod 52, causing two adjacent stirring plate bodies 60 to approach each other. The airbag 57 is then compressed by the second spring 59. At this time, the telescopic plate 58 on the stirring plate body 60 is compressed, causing the telescopic plate 58 to further extend. The extended telescopic plate 58 can increase the contact area with the liquid, allowing the bubbles to mix better with the CPAM solution or silicone. Therefore, by appropriately adjusting the working speed of the servo motor 51, the extension length of the telescopic plate 58 can be adjusted to meet the gas treatment selection under different conditions.

[0065] It can be understood that the present invention is described through some embodiments. As is known to those skilled in the art, without departing from the spirit and scope of the present invention, various changes or equivalent replacements can be made to these features and embodiments. Additionally, under the teachings of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the present invention.

Claims

1. A demisting and dust-removing device for coke oven gas purification pretreatment, comprising a machine body (10), a first gas transmission pump (11) and a second gas transmission pump (14) are fixedly arranged at the top of the machine body (10), the output end of the first gas transmission pump (11) is fixedly connected with an air inlet pipe (12) through a flange, and it is characterized in that, An integrated dust and fog removal component is arranged in the cavity of the machine body (10); The integrated dust and fog removal component includes a conical exhaust part (31), a vertical part (32) fixedly connected to the exhaust part (31), and a liquid storage part (27) fixedly connected to the vertical part (32). The outer wall of the exhaust part (31) is fixedly installed on the inner wall of the machine body (10) through a bracket. Both sides of the liquid storage part (27) are fixedly connected with bending parts (33). The upper ends of the two bending parts (33) are fixedly connected with diversion parts (34). The diversion parts (34) on both sides respectively penetrate through the corresponding sides of the exhaust part (31) and extend into the cavity of the exhaust part (31). The other ends of the two diversion parts (34) are commonly fixedly connected with a gas guide cover (35). The top end of the gas guide cover (35) is fixedly connected to the top wall surface of the cavity of the exhaust part (31). A gas transmission cover (36) is fixedly arranged at the top of the exhaust part (31). The gas transmission cover (36) is in a horn shape and is communicated with the gas guide cover (35). An air inlet (13) is opened at the center position of the top of the machine body (10). The output end of the air inlet pipe (12) is fixedly connected to the top position of the machine body (10) through a flange. The air inlet pipe (12) is communicated with the air inlet (13). A reagent adding pipe (16) and an exhaust pipe (15) are respectively fixedly installed on the top sides of both sides of the exhaust part (31). Solenoid valves are installed in both the reagent adding pipe (16) and the exhaust pipe (15), and both the reagent adding pipe (16) and the exhaust pipe (15) fixedly penetrate through the top wall surface of the machine body (10). The input end of the second air transmission pump (14) is connected to the exhaust pipe (15) through a flange. The fixedly penetrating parts of the two diversion parts (34) and the exhaust part (31) are in a sealed state. The top parts of the two diversion parts (34) are fixedly connected to form an inverted V shape. The bending part (33) is in an S shape, and the connection part of the bending part (33) and the corresponding diversion part (34) on one side is also sealed. The connection part of the liquid storage part (27) and the two bending parts (33) is also in a sealed state. The connection part of the liquid storage part (27) and the vertical part (32) is also in a sealed state. Diversion structures for continuously changing the air flow trend are arranged in the cavities of the two diversion parts (34); The diversion structure includes multiple groups of diversion vanes (37) fixedly arranged on the side walls of the diversion part (34). The diversion vanes (37) on both sides in the cavity of the diversion part (34) are distributed in a staggered state. The diversion vanes (37) are in an arc shape. The air flow passes through the diversion vanes (37) on both sides in an S shape. The connection part of the diversion vane (37) on the side far from the vertical part (32) and the diversion part (34) is in an inward concave arc shape. The connection part of the diversion vane (37) on the side close to the vertical part (32) and the diversion part (34) is in an inclined straight state; A plurality of electrostatic dust removal units are provided in the bending portions (33) on both sides. The electrostatic dust removal unit includes an electrostatic dust removal ball (38) with a hollow metal shell. The electrostatic dust removal ball (38) is movably arranged in the cavity of the bending portion (33). A star-shaped radial electrode (39) is fixedly installed at the central axis of the electrostatic dust removal ball (38). Air channels (40) are provided at both sides of the cavity of the bending portion (33) along the electrostatic dust removal ball (38). Airflow enters the electrostatic dust removal ball (38) through the air channel (40) at one end and then exits from the air channel (40) at the other end. A plurality of dust collecting electrodes (41) are fixedly arranged on the inner wall of the electrostatic dust removal ball (38). The dust collecting electrodes (41) are in an S shape. Vibration motors (42) for controlling the vibration of the electrostatic dust removal balls (38) are fixedly installed on the outer walls of the two bending portions (33) through brackets. A shielding shell is arranged outside the vibration motors (42). The output shafts of the vibration motors (42) penetrate through the wall surface of the bending portion (33) through socket bearings and sealing rings. The connection between the bending portion (33) and the vibration motor (42) is in a sealed state.

2. The demisting and dedusting device for coke oven gas purification pretreatment according to claim 1, wherein, A multi-functional stirring structure is arranged in the cavities of the liquid storage part (27) and the vertical part (32). The multi-functional stirring structure includes a servo motor (51) fixedly installed in the cavity of the exhaust part (31) through a bracket. A protective housing is arranged outside the servo motor (51). A vertically downward rotating rod (52) is fixedly installed at the output end of the servo motor (51). A protective sleeve (53) is movably installed on the outer wall below the rotating rod (52). The protective sleeve (53) is fixedly connected with the inner wall of the vertical part (32) through a bracket. A wire mesh demister (61) is fixedly installed at the middle inner wall of the cavity of the vertical part (32). The protective sleeve (53) and the rotating rod (52) penetrate through the wire mesh demister (61). A plurality of connecting structures are arranged at the bottom of the rotating rod (52). The other ends of the connecting structures are fixedly connected together with a cam disc (50). The cam disc (50) is hollow. Sealing blocks (43) are fixedly installed on the inner walls at the joints of the liquid storage part (27) and the bending parts (33) on both sides. The sealing blocks (43) are arc-shaped bodies. The positions of the sealing blocks (43) correspond to those of the cam disc (50). A plurality of air guide channels (44) are formed in each of the sealing blocks (43). The air guide channels (44) are in a horn shape. The side of the air guide channel (44) close to the rotating rod (52) is in a state where the inner diameter gradually decreases. A silicon carbide coating (46) is fixedly installed on the inner wall of the air guide channel (44). Air guide rods (45) are movably installed in the cavities of the air guide channels (44). The air guide rods (45) are also in a horn shape. The smallest diameter ends of the air guide rods (45) are fixedly connected with driving rods (47). The driving rods (47) on each side are jointly movably connected with a turning plate (49). A rotating shaft rod penetrates through the center position of the turning plate (49) movably. The rotating shaft rod is fixedly installed on the inner wall of the liquid storage part (27). The turning plate (49) can rotate through the rotating shaft rod. A first spring (48) is sleeved on the outer wall of the driving rod (47) located above on each side. The cam disc (50) intermittently rotates and presses against the upper outer walls of the two turning plates (49).

3. The demisting and dedusting device for coke oven gas purification pretreatment according to claim 2, wherein, The bottom of the rotating rod (52) is located at an eccentric position inside the cam disc (50) cavity. Each connecting structure includes two connecting plates (54). The connecting plates (54) are arc-shaped bodies. The connecting plates (54) are fixedly installed between the outer wall of the bottom of the rotating rod (52) and the inner wall of the cam disc (50). A plurality of groups of stirring parts are movably arranged between the two connecting plates (54). The stirring part includes a stirring plate body (60). On the side wall surfaces of the two connecting plates (54) close to each other, sliding grooves (55) are formed. At positions of the stirring plate body (60) close to the two sliding grooves (55), sliders (56) are fixedly provided. The sliders (56) are slidably installed in the sliding grooves (55). On the side wall surfaces of adjacent two stirring plate bodies (60) close to each other and away from each other, air bags (57) are fixedly installed. On the outer wall of the stirring plate body (60), a plurality of groups of telescopic plates (58) that can slide by piston expansion and contraction are movably installed. The outer wall of the telescopic plate (58) is conical. The stirring plate body (60) is in a hollow state. The stirring plate body (60) is communicated with the air bag (57). The cavities of the stirring plate body (60) and the air bag (57) form a sealed space. On the air bags (57) between adjacent two stirring plate bodies (60), second springs (59) are fixedly installed. Between the air bag (57) of the outermost stirring plate body (60) and the inner wall of the cam disc (50) and the wall surface of the rotating rod (52), a second spring (59) is also fixedly installed. The length of the stirring plate body (60) on the side close to the rotating rod (52) gradually decreases.

4. The demisting and dedusting device for coke oven gas purification pretreatment according to claim 1, characterized in that The bottom of the liquid storage part (27) is in a downward conical state. A sewage discharge pipe (26) is fixedly provided at the conical bottom of the liquid storage part (27). An electromagnetic valve is arranged inside the sewage discharge pipe (26). At the bottom wall surface of the cavity of the machine body (10), an annular liquid accumulation pipe (21) is fixed. The sewage discharge pipe (26) extends into the liquid accumulation pipe (21). A sewage discharge main pipe (20) is fixedly provided at the bottom of the liquid accumulation pipe (21). The sewage discharge main pipe (20) is located below the bottom wall surface of the machine body (10). An electromagnetic valve is arranged at the bottom of the sewage discharge main pipe (20). On the upper side of the inner wall of the liquid accumulation pipe (21), an annular second cleaning disc (19) is fixedly provided. On one side wall surface of the second cleaning disc (19), a second cleaning pipe (18) is fixedly provided. The second cleaning pipe (18) penetrates through the wall surface of the machine body (10).

5. The demisting and dedusting device for coke oven gas purification pretreatment according to claim 1, characterized in that, On the outer wall of the middle part of the air delivery cover (36), an annular third cleaning disc (23) is fixed. On the top wall surface of one side of the third cleaning disc (23), a third cleaning pipe (24) is fixedly provided. The third cleaning pipe (24) penetrates through the top wall surface of the machine body (10). On the inner wall of the middle part of the air delivery cover (36), a plurality of groups of spray pipes (25) corresponding to the position of the third cleaning disc (23) are fixedly provided. The spray pipes (25) are communicated with the third cleaning disc (23). An electromagnetic valve is assembled inside the spray pipes (25). The spray pipes (25) are inclined towards the two diversion parts (34) on both sides.

6. The demisting and dedusting device for coke oven gas purification pretreatment according to claim 1, wherein, An annular first cleaning tray (22) is also fixedly arranged at the inner wall position of the exhaust part (31). A plurality of groups of spray pipes along the direction of the inner wall of the exhaust part (31) are fixedly arranged at the bottom of the first cleaning tray (22). A first cleaning pipeline (17) is fixedly arranged at the top of one side of the first cleaning tray (22). An electromagnetic valve is installed in the first cleaning pipeline (17). The first cleaning pipeline (17) fixedly penetrates through the side wall surface of the exhaust part (31) and the penetration part is sealed. The other end of the first cleaning pipeline (17) also penetrates through the side wall of the machine body (10).

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