Demisting and dedusting device for purification pretreatment of coke oven gas

Abstract

The invention relates to the technical field of coke oven gas purification treatment, and discloses a coke oven gas purification pretreatment demisting and dedusting device which comprises a machine body, a first gas delivery pump and a second gas delivery pump are fixedly arranged at the top of the machine body, and the output end of the first gas delivery pump is fixedly connected with a gas inlet pipeline through a flange; an integrated dedusting and demisting assembly is arranged in a cavity of the machine body, the integrated dedusting and demisting assembly comprises a conical exhaust part, a vertical part fixedly connected with the exhaust part and a liquid storage part fixedly connected with the vertical part, and the outer wall of the exhaust part and the inner wall of the machine body are fixedly installed together through a support. According to the invention, through the integrated dedusting and demisting assembly, the coke oven gas containing mist and dust can be subjected to multi-stage purification treatment, including flow guide collision condensation, electrostatic precipitation, dust solidification entering a reagent solution and foam physical filtration, so that the pretreatment and purification efficiency of gas can be improved on the whole.

Description

Technical Field

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

[0002] As a byproduct of the coking industry, coke oven gas contains complex pollutants such as dust, tar, droplets and hydrogen sulfide, and needs to be efficiently pre-treated before entering the subsequent desulfurization process. In the existing technology, the pretreatment of coke oven gas generally adopts a single or combined process such as multi-stage physical filtration, wet scrubbing or electrostatic dust removal, but there are still problems such as low purification efficiency, easy clogging of equipment and high maintenance cost.

[0003] The patent with announcement number CN117683572A discloses a coke oven gas water washing spray dust removal equipment, including a vertical tower body, a vortex water washing mixer, a bracket, a Venturi acceleration turbulence mechanism, a secondary spray pipe and a demister, wherein the bracket is arranged on the side wall of the lower end of the inner cavity of the vertical tower body, the vortex water washing mixer is arranged on the bracket, the Venturi acceleration turbulence mechanism is arranged above the vortex water washing mixer, the secondary spray pipe is arranged above the Venturi acceleration turbulence mechanism, and the demister is arranged above the secondary spray pipe.

[0004] The above technical solution mainly adopts the spray-type water washing method, which has limited effect on the removal of micron-sized dust and tar droplets, and is not combined with deep treatment methods such as chemical coagulation or electrostatic adsorption, which makes it difficult to meet the pretreatment requirements of high-purity coal gas; and during the water washing process, tar is easy to adhere to the surface of the equipment, requiring frequent shutdowns for cleaning; the Venturi structure is prone to blockage of the flow channel due to particle deposition, and the maintenance cost is high. Therefore, a coke oven gas purification pretreatment demisting and dust removal device is urgently needed to solve the above problems.

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

[0006] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is: A demisting and dust removing device for purifying and pre-treating coke oven gas comprises a body, a first air delivery pump and a second air delivery pump are fixedly arranged on the top of the body, an output end of the first air delivery pump is fixedly connected to an air intake pipe via a flange, and an integrated demisting and dust removing component is arranged in the cavity of the body; The integrated dust and mist removal assembly includes a conical exhaust portion, a vertical portion fixedly connected to the exhaust portion, and a liquid storage portion fixedly connected to the vertical portion. The outer wall of the exhaust portion is fixedly installed with the inner wall of the body through a bracket, and both sides of the liquid storage portion are fixedly connected with a curved portion, and the upper ends of the two curved portions are fixedly connected with a guide portion. The guide portions on both sides respectively penetrate the corresponding two sides of the exhaust portion and extend into the cavity of the exhaust portion. The other ends of the two guide portions are commonly fixedly connected with an air guide cover, and the top of the air guide cover is fixedly connected to the top wall of the cavity of the exhaust portion; the top of the exhaust portion is fixedly provided with an air supply cover, which is trumpet-shaped and communicated with the air supply cover, an air inlet is opened at the top center of the body, and the output end of the air intake pipe is fixedly connected to the body through a flange At the top position, the air intake pipe is connected with the air inlet, and reagent adding pipes and exhaust pipes are fixedly installed on the tops of both sides of the exhaust part, solenoid valves are installed in the reagent adding pipes and the exhaust pipes, and the reagent adding pipes and the exhaust pipes are fixedly passed through the top wall of the machine body, and the input end of the second air pump is connected to the exhaust pipe through a flange; the fixed penetration points of the two guide parts and the exhaust part are in a sealed state, and the tops of the two guide parts are fixedly connected to form an inverted V shape, and the bent part is S-shaped, and the connection between the bent part and the guide part on the corresponding side is also sealed, and the connection between the liquid storage part and the two bent parts is also sealed, and the connection between the liquid storage part and the vertical part is also sealed; the cavities of the two guide parts are provided with guide structures that continuously change the trend of the airflow.

[0007] As a preferred embodiment of the present invention, the guide structure includes a plurality of groups of guide blades fixedly mounted on the wall surfaces on both sides of the guide portion, the guide blades on both sides of the guide portion cavity are distributed in a staggered state, the guide blades are arc-shaped, the airflow passes through the guide blades on both sides in an S-shaped state, the connection between the guide blades on the side away from the vertical portion and the guide portion is in an inwardly concave arc state, and the connection between the guide blades on the side close to the vertical portion and the guide portion is in an inclined straight state.

[0008] As a preferred embodiment of the present invention, multiple groups of electrostatic dust removal units are arranged in the curved parts on both sides, and the electrostatic dust removal units include electrostatic dust removal balls with hollow metal shells, which are movably arranged in the cavity of the curved part, and a certain gap is left between the electrostatic dust removal ball and the inner wall of the curved part, and star-shaped radial electrodes are fixedly installed at the central axis of the electrostatic dust removal ball. The electrostatic dust removal ball is provided with air passages at positions on both sides along the cavity of the curved part, and the airflow enters the electrostatic dust removal ball through the air passage at one end and is discharged from the air passage at the other end. Multiple groups of dust collecting poles are fixedly arranged on the inner wall of the electrostatic dust removal ball, and the dust collecting poles are S-shaped. Vibration motors for controlling the vibration of the electrostatic dust removal balls are fixedly installed on the outer walls of the two curved parts through brackets, and a shielding shell is arranged on the outside of the vibration motor. The output shaft of the vibration motor passes through the wall of the curved part through a sleeve bearing and a sealing ring, and the connection between the curved part and the vibration motor is in a sealed state.

[0009] As a preferred embodiment of the present invention, a multifunctional stirring structure is arranged in the cavity of the liquid storage part and the vertical part, and the multifunctional stirring structure includes a servo motor fixedly installed in the cavity of the exhaust part through a bracket, a protective shell is arranged on the outside of the servo motor, and a rotating rod facing vertically downward is fixedly arranged at the output end of the servo motor, a protective sleeve is movably installed on the lower outer wall of the rotating rod, the protective sleeve is fixedly arranged together with the inner wall of the vertical part through the bracket, a wire mesh demister is fixedly arranged on the inner wall of the middle part of the cavity of the vertical part, and the protective sleeve and the rotating rod penetrate the wire mesh demister; a plurality of connecting structures are arranged at the bottom of the rotating rod, and a cam plate is fixedly connected to the other end of the connecting structure, and the cam plate is hollow; the inner wall of the connection between the liquid storage part and the curved parts on both sides is fixedly arranged. The blocking block is an arc-shaped body, and the position of the blocking block corresponds to that of the cam disc; multiple groups of air ducts are provided on the blocking block on each side, and the air ducts are trumpet-shaped, and the inner diameter of the air duct close to the rotating rod is gradually reduced. A silicon carbide coating is fixed on the inner wall of the air duct, and an air guide rod is movably installed in the cavity of the air duct, and the air guide rod is also trumpet-shaped. The smallest diameter end of the air guide rod is fixedly connected with a driving rod, and the driving rods on each side are movably connected to a flip plate, and a rotating shaft rod movably penetrates the center position of the flip plate, and the rotating shaft rod is fixed on the inner wall of the liquid storage part, and the flip plate can be flipped by the rotating shaft rod, and a first spring is inserted into the outer wall of the driving rod on each side, and the cam disc intermittently rotates and squeezes the upper outer walls of the two flip plates.

[0010] As a preferred embodiment of the present invention, the bottom of the rotating rod is located at an eccentric position in the cam disc cavity, and each connecting structure includes two connecting plates, which are arc-shaped bodies and are fixedly installed between the bottom outer wall of the rotating rod and the inner wall of the cam disc. Multiple groups of stirring parts are movably arranged between the two connecting plates, and the stirring part includes a stirring plate body. Slide grooves are provided on the wall surfaces of one side of the two connecting plates close to each other, and sliders are fixedly provided at the positions of the stirring plate bodies close to the slide grooves on both sides. The sliders are slidably installed in the slide grooves, and the adjacent two stirring plate bodies are close to each other and relative to each other. Airbags are fixedly installed on the wall surfaces on the sides away from each other, and multiple groups of telescopic plates that can slide and retract through pistons are movably installed on the outer wall of the stirring plate body. The outer wall of the telescopic plate is conical, and the stirring plate body is hollow. The stirring plate body is connected with the airbag, and the cavity of the stirring plate body and the airbag constitutes a sealed space. A second spring is fixedly installed on the airbag between two adjacent stirring plate bodies, and a second spring is also fixedly installed between the airbag of the stirring plate body on the outermost side and the inner wall of the cam plate and the wall of the rotating rod. The length of the stirring plate body close to the rotating rod is gradually reduced.

[0011] As a preferred embodiment of the present invention, the bottom of the liquid storage portion is in a downward conical state, and a drain pipe is fixedly provided at the conical bottom of the liquid storage portion, and an electromagnetic valve is arranged in the drain pipe; an annular liquid accumulation pipe is fixed at the bottom wall of the cavity of the body, and the drain pipe extends into the liquid accumulation pipe, and a main drain pipe is fixedly provided at the bottom of the liquid accumulation pipe, and the main drain pipe is located below the bottom wall of the body, and an electromagnetic valve is arranged at the bottom of the main drain pipe, and an annular second cleaning disk is fixedly provided on the upper side of the inner wall of the liquid accumulation pipe, and a second cleaning pipe is fixedly provided on one side wall of the second cleaning disk, and the second cleaning pipe runs through the wall of the body.

[0012] As a preferred embodiment of the present invention, a third annular cleaning disk is fixed on the middle outer wall of the gas hood, a third cleaning pipe is fixed on the top wall of one side of the third cleaning disk, the third cleaning pipe runs through the top wall of the body, a plurality of groups of jet pipes corresponding to the position of the third cleaning disk are fixed on the middle inner wall of the gas hood, the jet pipes are connected with the third cleaning disk, an electromagnetic valve is installed in the jet pipes, and the jet pipes are inclined toward the guide parts on both sides.

[0013] As a preferred embodiment of the present invention, a first annular cleaning disk is fixedly provided at the inner wall of the exhaust portion, a plurality of spray pipes along the inner wall of the exhaust portion are fixedly provided at the bottom of the first cleaning disk, a first cleaning pipe is fixedly provided at the top of one side of the first cleaning disk, an electromagnetic valve is installed in the first cleaning pipe, the first cleaning pipe fixes and penetrates the side wall of the exhaust portion and the penetration point is sealed, and the other end of the first cleaning pipe also penetrates the side wall of the machine body.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention can achieve multi-stage purification of coke oven gas containing mist and dust through the integrated dust removal and demisting assembly, including diversion collision condensation, electrostatic dust removal, dust coagulation entering the reagent solution and foam physical filtration, which can improve the pre-treatment purification efficiency of the gas as a whole.

[0015] 2. The guide structure provided by the present invention enables the mist droplets, dust or tar droplets contained in the flue gas to continuously contact or collide with the guide blades under the guiding effect of the airflow, so that the liquid after the collision can slowly condense together, thereby improving the efficiency of capturing mist droplets, dust and tar droplets.

[0016] 3. The guide vanes provided in the present invention have a concave arc-shaped connection with the guide part on the side away from the vertical part. This arrangement is to facilitate the smooth sliding down of the condensed droplets, while the connection between the guide vanes and the guide part on the side close to the vertical part is inclined and straight. This design is also to facilitate the sliding down of the droplets. The surface of the guide vanes is coated with silicon carbide, which can reduce corrosion and tar adhesion, and is convenient for subsequent flushing and maintenance.

[0017] 4. The present invention provides an electrostatic precipitator unit. After the coke oven gas containing mist and dust enters the airway, the charged particles approach the dust collecting electrode under the action of the electric field force and are finally adsorbed on the dust collecting electrode. The vibration motor drives the electrostatic precipitator ball to vibrate slightly, which can allow the airflow flowing downward from above to enter the airway better. The swinging dust collecting electrode can also increase the contact efficiency and contact area with the airflow, thereby improving the electrostatic precipitator efficiency of the flue gas to a certain extent.

[0018] 5. Through the electrostatic dust removal unit provided in the present invention, when water or reagents are subsequently injected for cleaning and maintenance, the appropriate vibration of the vibration motor can accelerate the falling of dust particles on the dust collecting electrode. Combined with the flushing of the water body, the water body can be shaken to a certain extent in the electrostatic dust removal ball. The shaking water body can collide back and forth, and the dust collecting electrode can be better flushed during the collision, thereby improving the efficiency of subsequent maintenance and cleaning.

[0019] 6. The present invention provides a multifunctional stirring structure, and the airflow passing through the curved portion will be compressed and injected into the liquid storage portion. The cam plate intermittently reciprocates the flip plates on both sides, so that the airflow can continuously pass through the air guide channel and become bubbles. After the airflow becomes bubbles, it continuously enters the PAM solution. The dust particles or tar droplets in the airflow will continuously condense with the CPAM solution to form larger particles that remain in the CPAM solution, thereby achieving purification of the flue gas.

[0020] 7. The present invention provides a multifunctional stirring structure, and the cam plate mixes and stirs the PAM solution and siloxane in the liquid storage cavity to a certain extent. When the bubbles rise from the bottom of the cavity of the liquid storage portion, the surface of the bubbles adsorbs siloxane molecules to form a "gas-liquid-siloxane" three-phase interface. After the bubbles reach the liquid surface, the siloxane molecules accumulate on the liquid surface to form a foam layer. 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.

[0021] 8. The silicon carbide coating is set to reduce the problem of tar adhesion and blockage. Because in the later maintenance and water cleaning, the water from top to bottom carries the previously cleaned particles and tar and flows downward. By continuously squeezing the flip plate, the particles and tar can pass through the air duct. When the particles are blocked by the air duct, they can be squeezed out through the continuous reciprocating motion of the air rod, thereby avoiding blockage and improving the flow efficiency of cleaning water or reagents. The material of the silicon carbide coating itself can minimize the problem of tar adhesion and improve the overall efficiency of later maintenance.

[0022] 9. When the rotating rod drives the cam plate to rotate through multiple sets of connection structures, the stirring plate moves to the side away from the rotating rod under the action of centrifugal force, so that the two adjacent stirring plates are close to each other, and the airbag is compressed by the second spring. At this time, the telescopic plate on the stirring plate is compressed, which makes the telescopic plate further extended. 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, the extension length of the telescopic plate can be adjusted by appropriately adjusting the working speed of the servo motor, which can meet the gas processing options under different situations.

[0023] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In the attached picture: Figure 1 It is an overall stereogram of the present invention; Figure 2 It is a cross-sectional view of the body of the present invention; Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle; Figure 4 For the present invention Figure 2 Enlarged view of point B in the middle; Figure 5 For the present invention Figure 2 Enlarged view of point C in the middle; Figure 6 For the present invention Figure 2 Enlarged view of point D in the middle; Figure 7 For the present invention Figure 6 Enlarged view of point E in the middle; Figure 8 For the present invention Figure 2 Enlarged view of point F in the middle; Fig. 9 For the present invention Figure 2 Enlarged view of point G in the middle; Fig.10 A three-dimensional diagram of the integrated dust and mist removal assembly of the present invention; Fig.11 It is a three-dimensional diagram of the cam disc of the present invention; Fig.12 It is a three-dimensional diagram of the connection structure of the present invention; Fig.13 A three-dimensional diagram of the stirring plate and the connecting plate of the present invention; Fig.14 This is a cross-sectional view of the stirring plate of the present invention.

[0025] In the figure: 10, body; 11, first air delivery pump; 12, air inlet pipe; 13, air inlet; 14, second air delivery pump; 15, exhaust pipe; 16, reagent adding pipe; 17, first cleaning pipe; 18, second cleaning pipe; 19, second cleaning tray; 20, sewage main pipe; 21, liquid collection pipe; 22, first cleaning tray; 23, third cleaning tray; 24, third cleaning pipe; 25, jet pipe; 26, sewage pipe; 27, liquid storage part; 31, exhaust part; 32, vertical part; 33, curved part; 34, flow guide part; 35, air guide cover; 36, Gas hood; 37. guide vane; 38. electrostatic dust removal ball; 39. star-shaped radial electrode; 40. air duct; 41. dust collecting electrode; 42. vibration motor; 43. blocking block; 44. air duct; 45. air guide rod; 46. silicon carbide coating; 47. driving rod; 48. first spring; 49. flip plate; 50. cam plate; 51. servo motor; 52. rotating rod; 53. protective cover; 54. connecting plate; 55. slide groove; 56. slider; 57. air bag; 58. telescopic plate; 59. second spring; 60. stirring plate; 61. wire mesh demister. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention.

[0027] A coke oven gas purification pretreatment demisting and dust removal device, such as Figure 1 , Figure 2 , Fig.10As shown, it includes a body 10, a first air delivery pump 11 and a second air delivery pump 14 are fixedly arranged on the top of the body 10, the output end of the first air delivery pump 11 is fixedly connected to the air intake pipe 12 through a flange, and an integrated dust removal and demisting assembly is arranged in the cavity of the body 10; the integrated dust removal and demisting assembly includes a conical exhaust portion 31, a vertical portion 32 fixedly connected to the exhaust portion 31, and a liquid storage portion 27 fixedly connected to the vertical portion 32, and the outer wall of the exhaust portion 31 is fixedly installed on the inner wall of the body 10 through a bracket. The two sides of the liquid storage part 27 are fixedly connected with a bent part 33, and the upper ends of the two bent parts 33 are fixedly connected with a guide part 34. The guide parts 34 on both sides respectively penetrate 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 guide parts 34 are fixedly connected with an air guide cover 35. The top of the air guide cover 35 is fixedly connected with the top wall of the cavity of the exhaust part 31; the top of the exhaust part 31 is fixedly provided with an air delivery cover 36, which is trumpet-shaped and connected to the air delivery cover 35. The top center of the machine body 10 is provided with an air inlet 13, the output end of the air inlet pipe 12 is fixedly connected to the top of the machine body 10 through a flange, the air inlet pipe 12 is connected to the air inlet 13, and the tops of both sides of the exhaust part 31 are respectively fixedly installed with a reagent adding pipe 16 and an exhaust pipe 15, and both the reagent adding pipe 16 and the exhaust pipe 15 are installed with solenoid valves and the reagent adding pipe 16 and the exhaust pipe 15 are fixedly passed through the top wall of the machine body 10, and the input end of the second air delivery pump 14 is connected to the top of the machine body 10 through the second air delivery pump 14. The flange is connected to the exhaust pipe 15; the fixed penetration points of the two guide parts 34 and the exhaust part 31 are in a sealed state, the tops of the two guide parts 34 are fixedly connected to form an inverted V shape, the curved part 33 is S-shaped, and the connection between the curved part 33 and the guide part 34 on the corresponding side is also sealed, the connection between the liquid storage part 27 and the two curved parts 33 is also in a sealed state, and the connection between the liquid storage part 27 and the vertical part 32 is also in a sealed state; the cavities of the two guide parts 34 are both provided with guide structures that continuously change the airflow trend.

[0028] Specifically, the coke oven gas containing mist and dust is injected into the air intake pipe 12 through the first air delivery pump 11 after being cooled, and the working switch of the second air delivery pump 14 is turned on at the same time. When the second air delivery pump 14 is working, the second air delivery pump 14 sucks air through the exhaust pipe 15, and the exhaust pipe 15 sucks air through the exhaust part 31. The gas enters the air delivery cover 36 through the air inlet 13, and then enters the air guide cover 35 through the air delivery cover 36. After entering the air guide cover 35, it can go to the guide parts 3 on both sides. 4 enters and goes inside. It is worth noting that the cavity of the exhaust part 31 and the cavity of the air guide cover 35 are separated and not connected. The exhaust part 31, the vertical part 32, the curved part 33, the guide part 34 and the air guide cover 35 of the device are composed of a whole similar to the "Klein bottle" structure; after the gas is passed into the guide parts 34 on both sides, it will enter the curved parts 33 on both sides, and finally enter the liquid storage part 27, then enter the vertical part 32, and finally enter the exhaust part 31, and then be sucked away. It is worth noting that the output end of the second gas delivery pump 14 is connected to other exhaust gas treatment equipment, and the pre-treated gas treated by the device is then transported to other treatment devices for treatment.

[0029] like Figure 2 , Figure 3 , Fig.10 As shown, the bottom of the liquid storage portion 27 is in a downwardly conical state, and a drain pipe 26 is fixedly provided at the conical bottom of the liquid storage portion 27, and an electromagnetic valve is arranged in the drain pipe 26; an annular liquid accumulation pipe 21 is fixed at the bottom wall of the cavity of the body 10, and the drain pipe 26 extends into the liquid accumulation pipe 21, and a main drain pipe 20 is fixedly provided at the bottom of the liquid accumulation pipe 21, and the main drain pipe 20 is located below the bottom wall of the body 10, and an electromagnetic valve is arranged at the bottom of the main drain pipe 20, and an annular second cleaning tray 19 is fixedly provided on the upper side of the inner wall of the liquid accumulation pipe 21, and a second cleaning pipe 18 is fixedly provided on one side wall of the second cleaning tray 19, and the second cleaning pipe 18 passes through the wall of the body 10. A third annular cleaning disk 23 is fixed on the middle outer wall of the gas supply hood 36, a third cleaning pipe 24 is fixed on the top wall of one side of the third cleaning disk 23, and the third cleaning pipe 24 penetrates the top wall of the machine body 10. A plurality of jet pipes 25 corresponding to the position of the third cleaning disk 23 are fixed on the middle inner wall of the gas supply hood 36, and the jet pipes 25 are connected to the third cleaning disk 23. Solenoid valves are installed in the jet pipes 25, and the jet pipes 25 are inclined toward the guide parts 34 on both sides. A first annular cleaning disk 22 is also fixed at the inner wall of the exhaust part 31, and a plurality of jet pipes along the inner wall of the exhaust part 31 are fixed at the bottom of the first cleaning disk 22. A first cleaning pipe 17 is fixed on the top of one side of the first cleaning disk 22, and a solenoid valve is installed in the first cleaning pipe 17. The first cleaning pipe 17 penetrates the side wall of the exhaust part 31 and the penetration is sealed. The other end of the first cleaning pipe 17 also penetrates the side wall of the machine body 10.

[0030] Specifically, the electromagnetic valve of the reagent adding pipeline 16 is opened, and the input end of the reagent adding pipeline 16 can be connected to the CPAM solution adding device or the siloxane adding device, as follows: A certain amount of CPAM solution is added to the exhaust section 31 through the reagent adding pipeline 16. The CPAM solution flows into the vertical section 32 along the inner wall of the exhaust section 31, and finally converges in the liquid storage section 27. After the coke oven gas containing mist and dust enters the CPAM solution, dust condensation will be carried out, and small droplets and dust will aggregate into large particles, which will cause the large particles to remain in the CPAM solution, thereby filtering the gas. After the CPAM solution is added, a certain amount of siloxane is added to the exhaust section 31 through the reagent adding pipeline 16. The siloxane can be polydimethylsiloxane. After the gas treatment is completed, the liquid can be discharged into the liquid collection pipe 21 by opening the electromagnetic valve in the sewage pipe 26, and finally discharged through the sewage main pipe 20. The second cleaning tray 19 and the second cleaning pipeline 18 are arranged to facilitate the water spray cleaning of the inner wall of the liquid collection pipe 21.

[0031] Similarly, the third cleaning tray 23, the third cleaning pipe 24, and the jet pipe 25 are arranged so that after each gas treatment is completed, the input end of the third cleaning pipe 24 is connected to the water outlet of the water pump, and the water pump injects clean water or reagent solution into the jet pipe 25 under high pressure, and the electromagnetic valve in the jet pipe 25 is opened, and the clean water or reagent solution can be sprayed out through the jet pipe 25, and sprayed into the guide parts 34 on both sides through the jet pipe 25, and pollutants such as particulate matter, impurities, dirt, tar, etc. are flushed away and rinsed by high pressure, and then enter the curved part 33 for flushing, and can also be discharged through the liquid storage part 27 after flushing.

[0032] Similarly, the first cleaning tray 22, the spray pipe, and the first cleaning pipeline 17 are also provided for cleaning and maintenance of the entire equipment. After the pretreatment of the flue gas is completed, the input end of the first cleaning pipeline 17 is also connected to the pump body. The pump body injects clean water or reagent solution into the first cleaning pipeline 17 under high pressure, and sprays it downward along the inner wall of the exhaust part 31 through the spray pipe at the bottom of the first cleaning tray 22. The high-pressure water flushes the inner wall of the exhaust part 31, and flows downward along the inner wall of the vertical part 32. Finally, the water enters the liquid storage part 27 for flushing, and can also be discharged through the sewage pipe 26 after flushing.

[0033] like Figure 2 and Figure 4As shown, the guide structure includes a plurality of guide blades 37 fixedly arranged on the wall surfaces on both sides of the guide portion 34. The guide blades 37 on both sides of the cavity of the guide portion 34 are distributed in a staggered state. The guide blades 37 are arc-shaped. The airflow passes through the guide blades 37 on both sides in an S-shaped state. The connection between the guide blades 37 on the side away from the vertical portion 32 and the guide portion 34 is in a concave arc state, and the connection between the guide blades 37 on the side close to the vertical portion 32 and the guide portion 34 is in an inclined straight state.

[0034] Specifically, the coke oven gas containing mist and dust will flow downward along the staggered guide blades 37 when entering the arc-shaped guide part 34. The mist droplets, dust or tar droplets contained in the flue gas will continuously contact or collide with the guide blades 37 under the guidance of the airflow, so that the liquid after the collision can slowly condense together, thereby improving the efficiency of capturing mist droplets, dust and tar droplets. At the same time, the connection between the guide blade 37 on the side away from the vertical part 32 and the guide part 34 is in a concave arc state, and this setting is to facilitate the smooth sliding down of the condensed droplets, while the connection between the guide blade 37 on the side close to the vertical part 32 and the guide part 34 is in an inclined straight state, and this design is also to facilitate the sliding down of the droplets. The surface of the guide blade 37 adopts a silicon carbide coating, which can reduce corrosion and tar adhesion, and is convenient for later flushing and maintenance.

[0035] like Figure 2 , Figure 5 , Fig.10 As shown, the curved portions 33 on both sides are provided with a plurality of electrostatic dust removal units, the electrostatic dust removal units include electrostatic dust removal balls 38 with hollow metal shells, the electrostatic dust removal balls 38 are movably arranged in the cavity of the curved portion 33, a certain gap is left between the electrostatic dust removal balls 38 and the inner wall of the curved portion 33, a star-shaped radial electrode 39 is fixedly installed at the central axis of the electrostatic dust removal balls 38, and air passages 40 are opened at both sides of the electrostatic dust removal balls 38 along the cavity of the curved portion 33, and the airflow enters through the air passage 40 at one end. The dust enters the electrostatic dust removal ball 38 and is then discharged from the air duct 40 at the other end. A plurality of dust collecting poles 41 are fixedly provided on the inner wall of the electrostatic dust removal ball 38. The dust collecting poles 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 the two curved parts 33 through brackets. A shielding shell is provided on the outer side of the vibration motor 42. The output shaft of the vibration motor 42 passes through the wall surface of the curved part 33 through a sleeve bearing and a sealing ring. The connection between the curved part 33 and the vibration motor 42 is in a sealed state.

[0036] During use, after the preliminary treatment of the above-mentioned guide part 34, the flue gas will continue to flow downward, and the flue gas will enter the electrostatic dust removal ball 38 through the air duct 40 along the curved part 33, and the working switch of the vibration motor 42 is turned on. The vibration frequency of the vibration motor 42 is adjustable, and the vibration motor 42 will drive the electrostatic dust removal ball 38 to swing slightly. The working switch of the star-shaped radial electrode 39 is turned on, and the coke oven gas containing mist 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 are finally adsorbed on the dust collecting electrode 41. It is worth noting that at this time, the vibration amplitude of the electrostatic dust removal ball 38 driven by the vibration motor 42 is relatively small, so as to avoid the problem of dust particles adsorbed on the dust collecting electrode 41 shaking and falling. At the same time, the air duct 40 opened on the electrostatic dust removal ball 38, the air duct 40 at one end is for air intake, and the air duct 40 at the other end is for air outlet, and the air ducts 40 at both ends need to be in corresponding states, and the smoothness of the airflow passing through needs to be ensured. At the same time, when the electrostatic dust removal ball 38 swings slightly, it can allow the airflow flowing downward from the top to better enter the air duct 40. The dust collecting pole 41 when swinging can also increase the contact efficiency and contact area with the airflow, thereby improving the electrostatic dust removal efficiency of the flue gas to a certain extent.

[0037] It should be further explained that when water or reagents are subsequently injected 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, the vibration frequency of the vibration motor 42 is increased, so that the vibration motor 42 drives the electrostatic dust removal ball 38 to vibrate at a certain frequency, which can accelerate the falling of dust particles on the dust collecting electrode 41. At the same time, in conjunction with the flushing of the water body, the water body can be allowed to shake a certain amount in the electrostatic dust removal ball 38, and the shaking water body can collide back and forth, which can better flush the dust collecting electrode 41 and improve the efficiency of subsequent maintenance and cleaning.

[0038] like Figure 2 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.11 , Fig.12 , Fig.13As shown, a multifunctional stirring structure is arranged in the cavity of the liquid storage part 27 and the vertical part 32, and the multifunctional stirring structure includes a servo motor 51 fixedly installed in the cavity of the exhaust part 31 through a bracket, and a protective shell is arranged on the outside of the servo motor 51, and a vertical downward rotating rod 52 is fixedly arranged at the output end of the servo motor 51, and a protective sleeve 53 is movably installed on the lower outer wall of the rotating rod 52, and the protective sleeve 53 is fixedly arranged together with the inner wall of the vertical part 32 through the bracket, and a wire mesh demister 61 is fixedly arranged on the inner wall of the middle part of the cavity of the vertical part 32, and the protective sleeve 53 and the rotating rod 52 penetrate the wire mesh demister 61; a plurality of connecting structures are arranged at the bottom of the rotating rod 52, and a cam plate 50 is fixedly connected to the other end of the connecting structure, and the cam plate 50 is hollow; a blocking block 43 is fixedly installed on the inner wall of the connection between the liquid storage part 27 and the curved parts 33 on both sides, and the blocking block 4 3 is an arc-shaped body, and the blocking block 43 corresponds to the position of the cam disc 50; a plurality of groups of air guide channels 44 are provided on the blocking block 43 on each side, and the air guide channels 44 are trumpet-shaped, and the inner diameter of the air guide channels 44 on the side close to the rotating rod 52 is gradually reduced. A silicon carbide coating 46 is fixedly provided on the inner wall of the air guide channels 44, and an air guide rod 45 is movably installed in the cavity of the air guide channels 44, and the air guide rod 45 is also trumpet-shaped. The smallest diameter end of the air guide rod 45 is fixedly connected with a driving rod 47, and the driving rod 47 on each side is movably connected with a flip plate 49, and a rotating shaft rod is movably penetrated at the center position of the flip plate 49, and the rotating shaft rod is fixed on the inner wall of the liquid storage part 27, and the flip plate 49 can be flipped by the rotating shaft rod, and a first spring 48 is inserted into the outer wall of the driving rod 47 on each side, and the cam disc 50 intermittently rotates and squeezes the upper outer wall of the two flip plates 49.

[0039] During use, after adding PAM solution and siloxane 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, and 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 siloxane in the cavity of the liquid storage part 27 to a certain extent. At the same time, the airflow passing through the curved part 33 will be compressed and injected into the liquid storage part 27, and the airflow will be turned into bubbles when passing through the air guide channel 44. 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 plate 49, the upper air guide rod 45 pushes outward to open the upper air guide channel 44, and the lower air guide rod 45 moves to 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 is in contact and separated, the upper air guide rod 45 moves toward one side of the cavity of the liquid storage part 27 under the elastic force of the first spring 48. Under the action of this reciprocating cycle, the airflow can continuously pass through the air guide channel 44 to become bubbles. After the airflow becomes bubbles, it continuously enters the PAM solution. The dust particles or tar droplets in the airflow will continuously condense with the CPAM solution to form larger particles that remain in the CPAM solution, thereby achieving purification of the flue gas.

[0040] 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 siloxane molecules to form a "gas-liquid-siloxane" three-phase interface. After the bubbles reach the liquid surface, the siloxane molecules accumulate on the liquid surface to form a foam layer. Due to the hydrophobicity and elastic membrane effect of siloxane, 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 flue gas treatment efficiency.

[0041] 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 bubbles upward.

[0042] It is worth noting that during the work, the CPAM solution and siloxane need to be replenished regularly. When the foam rises, it may carry the CPAM solution, resulting in reagent loss. The setting of the wire mesh demister 61 can avoid the loss of CPAM solution as much as possible. The concentration of siloxane can be 0.01% to 0.08%, preferably 0.05%, because excessive siloxane may wrap the CPAM molecules and reduce the coagulation efficiency.

[0043] Furthermore, the silicon carbide coating 46 is provided to reduce the problems of tar adhesion and blockage. Because during later maintenance and water cleaning, the water from top to bottom carries the previously cleaned particles and tar and flows downward. By continuously squeezing the flip plate 49, the particles and tar can pass through the air duct 44. When the particles are blocked by the air duct 44, they can be squeezed out by the continuous reciprocating motion of the air guide rod 45, thereby 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.

[0044] At the same time, when bubbles are generated, the stirring of the cam plate 50 can allow the bubbles to be better mixed with the CPAM solution and the silicone, thereby improving the overall work efficiency.

[0045] like Fig.11 , Fig.12 , Fig.13 , Figure 8 , Fig.14 and Figure 6 As shown, the bottom of the rotating rod 52 is located at an eccentric position in the cavity of the cam plate 50, and each connecting structure includes two connecting plates 54. The connecting plates 54 are arc-shaped bodies, and are fixedly installed between the bottom outer wall of the rotating rod 52 and the inner wall of the cam plate 50. Multiple groups of stirring parts are movably arranged between the two connecting plates 54, and the stirring parts include stirring plate bodies 60. Slide grooves 55 are provided on the side walls of the two connecting plates 54 close to each other. Slide blocks 56 are fixedly provided at the positions of the stirring plate bodies 60 close to the slide grooves 55 on both sides. The slide blocks 56 are slidably installed in the slide grooves 55. The side walls of the two adjacent stirring plate bodies 60 close to each other and away from each other are arranged on the side walls. An airbag 57 is fixedly installed on the top, and multiple groups of telescopic plates 58 that can slide and retract through pistons are movably installed on the outer wall of the stirring plate body 60. The outer wall of the telescopic plate 58 is conical, and the stirring plate body 60 is hollow. The stirring plate body 60 is connected with the airbag 57, and the cavities of the stirring plate body 60 and the airbag 57 form a sealed space. A second spring 59 is fixedly installed on the airbag 57 between two adjacent stirring plate bodies 60, and a second spring 59 is also fixedly installed between the airbag 57 located at the edge of the stirring plate body 60 and the inner wall of the cam plate 50 and the wall of the rotating rod 52. The length of the stirring plate body 60 close to the rotating rod 52 is gradually reduced.

[0046] When in use, the rotation speed of the servo motor 51 can be adjusted. When the rotating rod 52 drives the cam plate 50 to rotate through multiple sets of connecting structures, the stirring plate body 60 moves to the side away from the rotating rod 52 under the action of centrifugal force, so that the two adjacent stirring plate bodies 60 are close to each other, and the airbag 57 is compressed by the second spring 59. At this time, the telescopic plate 58 on the stirring plate body 60 is compressed, so that the telescopic plate 58 is further extended. The extended telescopic plate 58 can increase the contact area with the liquid, so that the bubbles can be better mixed with the CPAM solution or silicone. Therefore, the extension length of the telescopic plate 58 can be adjusted by appropriately adjusting the working speed of the servo motor 51, so as to meet the gas processing options under different situations.

[0047] It is to be understood that the present invention is described by some embodiments, and it is known to those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances 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 are within the scope of protection of the present invention.

Claims

1. A demisting and dust removing device for purifying and pre-treating coke oven gas, comprising a body (10), a first air delivery pump (11) and a second air delivery pump (14) being fixedly arranged on the top of the body (10), an output end of the first air delivery pump (11) being fixedly connected to an air intake pipe (12) via a flange, characterized in that: An integrated dust and mist removal component is arranged in the cavity of the machine body (10); The integrated dust and mist removal assembly comprises a conical exhaust portion (31), a vertical portion (32) fixedly connected to the exhaust portion (31), and a liquid storage portion (27) fixedly connected to the vertical portion (32); the outer wall of the exhaust portion (31) is fixedly mounted on the inner wall of the body (10) via a bracket; both sides of the liquid storage portion (27) are fixedly connected to a curved portion (33); the upper ends of the two curved portions (33) are fixedly connected to a guide portion (34); the guide portions (34) on both sides respectively penetrate the exhaust portion (31) corresponding to the inner wall of the body (10); The two guide portions (34) are connected to the exhaust portion (31) on both sides and extend into the cavity of the exhaust portion (31); the other ends of the two guide portions (34) are fixedly connected to an air guide cover (35); the top of the air guide cover (35) is fixedly arranged with the top wall of the cavity of the exhaust portion (31); a gas delivery cover (36) is fixedly arranged on the top of the exhaust portion (31); the gas delivery cover (36) is trumpet-shaped, and the gas delivery cover (36) is connected to the gas guide cover (35); an air inlet (13) is opened at the center of the top of the machine body (10); the output end of the air inlet pipe (12) is fixedly connected to the exhaust portion (31) by a flange At the top of the machine body (10), the air inlet pipe (12) is connected to the air inlet (13), and reagent adding pipes (16) and exhaust pipes (15) are respectively fixedly installed on the tops of both sides of the exhaust part (31), and electromagnetic valves are installed in the reagent adding pipes (16) and the exhaust pipes (15). The reagent adding pipes (16) and the exhaust pipes (15) are fixedly passed through the top wall of the machine body (10), and the input end of the second air delivery pump (14) is connected to the exhaust pipe (15) through a flange; the two guide parts (31) are connected to the exhaust pipe (15) through a flange; 4) The fixed penetration point with the exhaust part (31) is in a sealed state, the tops of the two guide parts (34) are fixedly connected to form an inverted V shape, the curved part (33) is S-shaped, the connection between the curved part (33) and the guide part (34) on the corresponding side is also sealed, the connection between the liquid storage part (27) and the two curved parts (33) is also in a sealed state, and the connection between the liquid storage part (27) and the vertical part (32) is also in a sealed state; the cavities of the two guide parts (34) are both provided with a guide structure that continuously changes the airflow trend.

2. The demisting and dust removing device for the purification pretreatment of coke oven gas according to claim 1, characterized in that: The flow guide structure comprises a plurality of groups of flow guide blades (37) fixedly arranged on the wall surfaces on both sides of the flow guide portion (34); the flow guide blades (37) on both sides of the cavity of the flow guide portion (34) are distributed in a staggered state; the flow guide blades (37) are arc-shaped; airflow passes through the flow guide blades (37) on both sides in an S-shaped state; the connection between the flow guide blade (37) on the side away from the vertical portion (32) and the flow guide portion (34) is in a concave arc state; and the connection between the flow guide blade (37) on the side close to the vertical portion (32) and the flow guide portion (34) is in an inclined straight state.

3. The demisting and dust removing device for the purification pretreatment of coke oven gas according to claim 1, characterized in that: A plurality of electrostatic dust removal units are arranged in the curved portions (33) on both sides. The electrostatic dust removal units include electrostatic dust removal balls (38) with hollow metal shells. The electrostatic dust removal balls (38) are movably arranged in the cavity of the curved portion (33). A star-shaped radial electrode (39) is fixedly installed at the central axis of the electrostatic dust removal ball (38). Airways (40) are opened at positions on both sides of the cavity of the curved portion (33). Airflow enters the electrostatic dust removal ball (38) through the airway (40) at one end and then flows out from the other end. The static dust removal ball (38) is discharged through an air passage (40); a plurality of dust collecting electrodes (41) are fixedly provided on the inner wall of the static dust removal ball (38); the dust collecting electrodes (41) are S-shaped; a vibration motor (42) for controlling the vibration of the static dust removal ball (38) is fixedly installed on the outer wall of the two curved portions (33) via a bracket; a shielding shell is provided on the outer side of the vibration motor (42); an output shaft of the vibration motor (42) passes through the wall surface of the curved portion (33) via a sleeve bearing and a sealing ring; and a connection between the curved portion (33) and the vibration motor (42) is in a sealed state.

4. The demisting and dust removing device for the purification pretreatment of coke oven gas according to claim 1, characterized in that: A multifunctional stirring structure is arranged in the cavity of the liquid storage portion (27) and the vertical portion (32), and the multifunctional stirring structure comprises a servo motor (51) fixedly mounted in the cavity of the exhaust portion (31) via a bracket, a protective shell is arranged on the outside of the servo motor (51), a rotating rod (52) facing vertically downward is fixedly arranged at the output end of the servo motor (51), a protective sleeve (53) is movably mounted on the outer wall below the rotating rod (52), and the protective sleeve (53) is connected to the inner wall of the vertical portion (32) via the bracket. The vertical portion (32) is fixedly provided with a wire mesh demister (61) on the inner wall of the middle part of the cavity, and the protective sleeve (53) and the rotating rod (52) penetrate the wire mesh demister (61); a plurality of connection structures are provided at the bottom of the rotating rod (52), and a cam plate (50) is fixedly connected to the other end of the connection structure, and the cam plate (50) is hollow; a sealing block (43) is fixedly installed on the inner wall of the connection between the liquid storage portion (27) and the curved portions (33) on both sides, and the sealing block (43) is The arc-shaped body has a blocking block (43) corresponding to the position of the cam plate (50); a plurality of air guide channels (44) are provided on each side of the blocking block (43); the air guide channels (44) are trumpet-shaped; the inner diameter of the air guide channels (44) on the side close to the rotating rod (52) is gradually reduced; a silicon carbide coating (46) is fixed on the inner wall of the air guide channels (44); an air guide rod (45) is movably installed in the cavity of the air guide channels (44); the air guide rod (45) is also trumpet-shaped; the diameter of the air guide rod (45) is The smallest ends are fixedly connected with a driving rod (47), and the driving rods (47) on each side are movably connected to a flip plate (49). A rotating shaft rod movably penetrates the center position of the flip plate (49), and the rotating shaft rod is fixed on the inner wall of the liquid storage part (27). The flip plate (49) can flip and move through the rotating shaft rod. The outer wall of the driving rod (47) on each side is sleeved with a first spring (48), and the cam plate (50) intermittently rotates and squeezes the upper outer walls of the two flip plates (49).

5. The demisting and dust removing device for the purification pretreatment of coke oven gas according to claim 4, characterized in that: The bottom of the rotating rod (52) is located at an eccentric position in the cavity of the cam plate (50), and each connecting structure includes two connecting plates (54). The connecting plates (54) are arc-shaped bodies and are fixedly installed between the bottom outer wall of the rotating rod (52) and the inner wall of the cam plate (50). Multiple groups of stirring parts are movably arranged between the two connecting plates (54), and the stirring parts include stirring plate bodies (60). Slide grooves (55) are provided on the side walls of the two connecting plates (54) close to each other. Slide blocks (56) are fixedly installed at positions of the stirring plate bodies (60) close to the slide grooves (55) on both sides. The slide blocks (56) are slidably installed in the slide grooves (55). The side walls of the two adjacent stirring plate bodies (60) close to each other and away from each other are fixedly provided with An airbag (57) is installed, and a plurality of groups of telescopic plates (58) that can be telescopically slid by a piston are movably installed on the outer wall of the stirring plate body (60), the outer wall of the telescopic plate (58) is tapered, the stirring plate body (60) is in a hollow state, the stirring plate body (60) is communicated with the airbag (57), and the cavities of the stirring plate body (60) and the airbag (57) form a sealed space, and a second spring (59) is fixedly installed on the airbag (57) between two adjacent stirring plate bodies (60), and a second spring (59) is also fixedly installed between the airbag (57) located at the outermost stirring plate body (60) and the inner wall of the cam plate (50) and the wall surface of the rotating rod (52), and the length of the stirring plate body (60) close to the rotating rod (52) is gradually reduced.

6. The demisting and dust removing device for the purification pretreatment of coke oven gas according to claim 1, characterized in that: The bottom of the liquid storage portion (27) is in a downwardly tapered state, a drain pipe (26) is fixedly provided at the tapered bottom of the liquid storage portion (27), and an electromagnetic valve is arranged in the drain pipe (26); an annular liquid accumulation pipe (21) is fixedly provided at the bottom wall surface of the cavity of the machine body (10), the drain pipe (26) extends into the liquid accumulation pipe (21), a drain main pipe (20) is fixedly provided at the bottom of the liquid accumulation pipe (21), the drain main pipe (20) is located below the bottom wall surface of the machine body (10), and an electromagnetic valve is arranged at the bottom of the drain main pipe (20); an annular second cleaning disk (19) is fixedly provided on the upper side of the inner wall of the liquid accumulation pipe (21), a second cleaning pipe (18) is fixedly provided on one side wall surface of the second cleaning disk (19), and the second cleaning pipe (18) passes through the wall surface of the machine body (10).

7. The demisting and dust removing device for the purification pretreatment of coke oven gas according to claim 1, characterized in that: A third annular cleaning disk (23) is fixed on the central outer wall of the gas delivery hood (36); a third cleaning pipe (24) is fixedly arranged on the top wall of one side of the third cleaning disk (23); the third cleaning pipe (24) passes through the top wall of the machine body (10); a plurality of jet pipes (25) corresponding to the positions of the third cleaning disk (23) are fixedly arranged on the central inner wall of the gas delivery hood (36); the jet pipes (25) are connected to the third cleaning disk (23); an electromagnetic valve is installed in the jet pipes (25); and the jet pipes (25) are inclined toward the guide portions (34) on both sides.

8. The demisting and dust removing device for purification pretreatment of coke oven gas according to claim 1, characterized in that: A first annular cleaning disc (22) is fixedly provided at the inner wall of the exhaust portion (31); a plurality of spray pipes are fixedly provided at the bottom of the first cleaning disc (22) along the inner wall of the exhaust portion (31); a first cleaning pipe (17) is fixedly provided at the top of one side of the first cleaning disc (22); an electromagnetic valve is installed in the first cleaning pipe (17); the first cleaning pipe (17) is fixedly penetrated through the side wall of the exhaust portion (31) and the penetration point is sealed; the other end of the first cleaning pipe (17) also penetrates through the side wall of the machine body (10).

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