Environment-friendly flue gas safe treatment filtering device

Abstract

The invention relates to an environment-friendly flue gas safe treatment filtering device which comprises a base, a smoke removal tower filled with washing liquid and a liquid supply pump used for enabling the washing liquid in the smoke removal tower to circularly flow, a pretreatment pipe is arranged in the base, a liquid supply pipe and a smoke inlet pipe are arranged at one end of the pretreatment pipe, the liquid supply pipe is communicated with the liquid supply pump, and the smoke inlet pipe is communicated with the liquid supply pump. The smoke inlet pipe is communicated with the public flue, a water wheel is rotatably connected to the interior of the pretreatment pipe, a spiral conveying blade and a driving bevel gear are coaxially arranged on the water wheel, a hollow rotating shaft is rotatably connected to the end, away from the smoke inlet pipe, of the pretreatment pipe, and a driven bevel gear meshed with the driving bevel gear is arranged at the lower end of the hollow rotating shaft; hollow stirring blades communicated with the interior of the hollow rotating shaft are distributed on the hollow rotating shaft in the smoke removal tower; by increasing the contact area of the flue gas and the washing liquid, the flue gas and the washing liquid are fully mixed and contacted, oil stains and particulate matters in the flue gas are favorably removed, and the purification degree is high.

Description

Technical Field

[0001] The invention relates to the technical field of flue gas treatment, and in particular to an environmentally friendly flue gas safety treatment and filtering device. Background Art

[0002] Flue gas is a mixture of gas and smoke, and is the main cause of air pollution in residential areas. The composition of flue gas is very complex. Gases include water vapor, sulfur dioxide, nitrogen, oxygen, carbon monoxide, carbon dioxide, hydrocarbons, and nitrogen oxides, and smoke includes fuel ash, coal particles, oil droplets, and high-temperature cracking products. Therefore, flue gas pollution to the environment is a complex pollution of multiple poisons. Smoke pollution to the air is closely related to meteorological conditions. Wind, atmospheric stability, turbulence, etc. are closely related to the state of atmospheric pollution. In addition, photochemistry and biochemistry also have a certain impact on flue gas pollution. The harmfulness of smoke to the human body is related to the size of the particles. Most of the harmful things to the human body are floating dust with a diameter of less than 10um, especially 1-2.5um floating dust, which is the most harmful.

[0003] High-rise residential areas are generally equipped with public flues. A large amount of flue gas containing grease and impurity particles will be generated during cooking. The range hood will collectively discharge the flue gas through the public flue. In the prior art, there are many methods for treating oily flue gas, including catalytic combustion oxidation, condensation absorption, spray absorption and other processes. Among them, the catalytic combustion oxidation and condensation absorption methods have the disadvantages of high operating costs, complex equipment structure and cumbersome operation. The spray absorption method is widely used because the washing liquid can be reused and the equipment structure is simple.

[0004] The principle of the spray absorption method is to spray the washing liquid into the flue gas, and the spray (the droplets formed after the washing liquid is sprayed out) mixes and contacts with the flue gas, and the particulate matter in the flue gas is adsorbed by the spray to purify the flue gas. However, the spray relies on gravity to settle down and mix with the flue gas. The movement state of the flue gas is uncertain, and part of the flue gas cannot be fully mixed and contacted with the spray, resulting in a certain amount of grease and particulate matter in the exhaust gas. The purification degree is low and cannot meet actual needs. Therefore, we invented an environmentally friendly flue gas safety treatment filter device. Summary of the invention

[0005] The embodiment of the present invention provides an environmentally friendly flue gas safety treatment and filtering device, which can solve the problem in the prior art that the flue gas cannot be fully mixed and contacted with the washing liquid, resulting in the exhaust gas still containing a certain amount of grease and particulate matter and a low degree of purification.

[0006] In order to solve the above technical problems, the present invention adopts the following technical scheme: an environmentally friendly flue gas safety treatment and filtering device, comprising a base, a smoke removal tower filled with a washing liquid, and a liquid supply pump for circulating the washing liquid in the smoke removal tower, the smoke removal tower is arranged on the base, and a pretreatment pipe is arranged inside the base, one end of the pretreatment pipe is arranged with a liquid supply pipe and a smoke inlet pipe, the liquid supply pipe is connected with the liquid supply pump, the smoke inlet pipe is connected with a public flue, the interior of the pretreatment pipe is rotatably connected with a water wheel, the water wheel is coaxially provided with a spiral conveying blade and an active bevel gear, the end of the pretreatment pipe away from the smoke inlet pipe is rotatably connected with a hollow rotating shaft, the lower end of the hollow rotating shaft is provided with a driven bevel gear meshing with the active bevel gear, the upper end of the hollow rotating shaft extends into the interior of the smoke removal tower, and a hollow stirring blade connected with the interior of the hollow rotating shaft is arranged on the hollow rotating shaft located inside the smoke removal tower, and a gas-liquid outlet hole connected with the interior of the stirring blade is arranged on the stirring blade.

[0007] Preferably, a plurality of support rods are arranged on the inner wall of the smoke removal tower, and an annular cover close to the inner bottom wall of the smoke removal tower is arranged at the proximal ends of the plurality of support rods, and rectangular grooves are arranged in an annular manner on the edge of the annular cover, and the stirring blades are located inside the annular cover.

[0008] Preferably, a plurality of baffles located below the level of the washing liquid are arranged above the annular cover.

[0009] Preferably, the liquid supply pipe is provided with a branch pipe extending into the interior of the smoke removal tower, and the end of the branch pipe is provided with a nozzle with a spraying direction facing downward.

[0010] Preferably, an airflow distribution plate is provided inside the smoke removal tower, which is located above the liquid level of the scrubbing liquid and below the nozzle, and air holes are arranged on the surface of the airflow distribution plate.

[0011] Preferably, a packing layer is provided inside the smoke removal tower between the airflow distribution plate and the nozzle, and the inside of the packing layer is filled with lightweight balls made of polyethylene, polypropylene, expanded polystyrene or porous rubber.

[0012] Preferably, a sedimentation tank is provided on the base, an overflow port connected to the sedimentation tank is provided on the side wall of the smoke removal tower, and a reflux pipe connected to the inside of the sedimentation tank is provided on the liquid supply pump.

[0013] Preferably, a filter screen is provided in the middle of the sedimentation tank, and the reflux pipe extends below the filter screen.

[0014] Preferably, a solid rotating shaft is rotatably connected to the middle part of the bottom wall of the sedimentation tank, the upper end of the solid rotating shaft passes through a filter screen and is provided with a cleaning brush, the lower end of the solid rotating shaft is provided with a driven pulley, the hollow rotating shaft is provided with a driving pulley, and a belt is connected for transmission between the driving pulley and the driven pulley.

[0015] Preferably, a demister is provided at the inner top of the smoke removal tower.

[0016] Compared with the prior art, the present invention is provided with a base, a smoke removal tower, a liquid supply pump, a pretreatment pipe, a liquid supply pipe, a smoke inlet pipe, a water wheel, a spiral conveying blade, an active bevel gear, a hollow rotating shaft, a driven bevel gear, a hollow stirring blade and a gas-liquid outlet hole. Smoke enters the pretreatment pipe from the smoke inlet pipe, the liquid supply pump pressurizes the washing liquid and enters the pretreatment pipe from the liquid supply pipe, the washing liquid impacts the water wheel, so that the water wheel drives the spiral conveying blade and the active bevel gear to rotate, and the rotation of the spiral conveying blade causes the smoke and the washing liquid to be preliminarily mixed in the pretreatment pipe, so that the oil stain is removed. After preliminary dissolution and purification, the flue gas enters the hollow stirring blade from the hollow rotating shaft and is discharged into the washing liquid in the smoke removal tower from the gas-liquid outlet hole on the hollow stirring blade. The flue gas discharged from the gas-liquid outlet hole generates a large number of bubbles in the washing liquid. The active bevel gear drives the driven bevel gear to rotate, and the driven bevel gear drives the hollow stirring blade to rotate through the hollow rotating shaft, breaking up the bubbles to form smaller bubbles. These bubbles can increase the contact area between the flue gas and the washing liquid, so that the flue gas and the washing liquid are fully mixed and contacted again, which is beneficial to remove oil and particulate matter in the flue gas, and the degree of purification is high.

[0017] Compared with the prior art, the present invention is beneficial to improving the subsequent flue gas purification effect by means of preliminary mixing in the pretreatment tube, and adopts a method in which the washing liquid is mixed with the flue gas and discharged from the gas-liquid outlet at the same time, which is beneficial to preventing oil stains from clogging the gas-liquid outlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the main cross-sectional structure of the smoke removal tower of the present invention;

[0020] Figure 3 This is a schematic diagram of the main cross-sectional structure of the pretreatment tube of the present invention;

[0021] Figure 4 This is a schematic diagram of the cross-sectional structure of the hollow stirring blade of the present invention;

[0022] Figure 5 This is a schematic diagram of the top view of the airflow distribution plate of the present invention;

[0023] Figure 6 This is a schematic diagram of the top view of the cleaning brush of the present invention.

[0024] In the figure: 1. smoke removal tower; 2. liquid supply pump; 3. base; 4. pretreatment pipe; 5. liquid supply pipe; 6. smoke inlet pipe; 7. water wheel; 8. spiral conveying blade; 9. active bevel gear; 10. hollow rotating shaft; 11. driven bevel gear; 12. hollow stirring blade; 13. gas-liquid outlet; 14. support rod; 15. annular cover; 16. rectangular groove; 17. baffle; 18. branch pipe; 19. nozzle; 20. air flow distribution plate; 21. air hole; 22. packing layer; 23. demister; 24. sedimentation tank; 25. overflow port; 26. reflux pipe; 27. filter; 28. solid rotating shaft; 29. ​​cleaning brush; 30. driven pulley; 31. active pulley; 32. belt; 33. heat dissipation coil; 34. sewage pipe. DETAILED DESCRIPTION

[0025] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the technical solutions of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] like Figure 1 to Figure 6 As shown, an environmentally friendly smoke safety treatment and filtering device comprises a base 3, a smoke removal tower 1 filled with washing liquid, and a liquid supply pump 2 for circulating the washing liquid in the smoke removal tower 1. The smoke removal tower 1 is arranged on the base 3, a pretreatment pipe 4 is arranged inside the base 3, a liquid supply pipe 5 and a smoke inlet pipe 6 are arranged at one end of the pretreatment pipe 4, the liquid supply pipe 5 is connected to the liquid supply pump 2, the smoke inlet pipe 6 is connected to the public flue, and a water wheel 7 is rotatably connected inside the pretreatment pipe 4, and the water wheel 7 is coaxially arranged There are spiral conveying blades 8 and a driving bevel gear 9. The end of the pretreatment tube 4 away from the smoke inlet pipe 6 is rotatably connected with a hollow rotating shaft 10. The lower end of the hollow rotating shaft 10 is provided with a driven bevel gear 11 meshing with the driving bevel gear 9. The upper end of the hollow rotating shaft 10 extends into the interior of the smoke removal tower 1, and the hollow rotating shaft 10 located inside the smoke removal tower 1 is provided with a hollow stirring blade 12 connected to the interior of the hollow rotating shaft 10, and the stirring blade 12 is provided with a gas-liquid outlet 13 connected to the interior thereof.

[0027] During specific use, the flue gas enters the pretreatment tube 4 from the smoke inlet pipe 6, the liquid supply pump 2 pressurizes the washing liquid and enters the pretreatment tube 4 from the liquid supply pipe 5, the washing liquid impacts the water wheel 7, the water wheel 7 drives the spiral conveying blade 8 and the active bevel gear 9 to rotate, the rotation of the spiral conveying blade 8 makes the flue gas and the washing liquid be preliminarily mixed in the pretreatment tube 4, so that the oil pollution is preliminarily dissolved and purified, and then enters the hollow stirring blade 12 from the hollow rotating shaft 10, and is discharged into the washing liquid in the smoke removal tower 1 through the gas-liquid outlet hole 13 on the hollow stirring blade 12, the flue gas discharged from the gas-liquid outlet hole 13 generates a large number of bubbles in the washing liquid, the active bevel gear 9 drives the driven bevel gear 11 to rotate, the driven bevel gear 11 drives the hollow stirring blade 12 to rotate through the hollow rotating shaft 10, and breaks up the bubbles to form smaller bubbles, which can increase the contact area between the flue gas and the washing liquid, so that the flue gas and the washing liquid are fully mixed and contacted again, which is beneficial to removing the oil pollution and particulate matter in the flue gas, and the purification degree is high.

[0028] In order to achieve the purpose of improving the flue gas treatment effect, preferably, a plurality of support rods 14 are arranged on the inner wall of the smoke removal tower 1, and an annular cover 15 close to the inner bottom wall of the smoke removal tower 1 is arranged at the proximal ends of the plurality of support rods 14. The edge of the annular cover 15 is provided with a rectangular groove 16 in a ring shape, and the stirring blades 12 are located inside the annular cover 15. The rotating hollow stirring blades 12 will form a negative pressure inside the annular cover 15, and the detergent and flue gas at the bottom will be sucked into the annular cover 15. Grease and particulate impurities in the flue gas will collide and shear with the inner wall of the annular cover 15 under the action of centrifugal force, and the dispersed small particles will pass through the rectangular groove 16. The grease and particulate impurities that do not pass through the rectangular groove 16 will collide with the inner wall of the annular cover 15 to form smaller particle bubbles, thereby further increasing the contact area with the detergent, and further improving the flue gas treatment effect.

[0029] In order to achieve the purpose of improving the flue gas treatment effect, preferably, a plurality of baffles 17 located below the liquid level of the washing liquid are arranged above the annular cover 15, and the baffles 17 include outer baffles located at the upper and lower ends and inner baffles located between the outer baffles. The airflow rising channel of the outer baffle is at its center position, and the airflow rising channel of the inner baffle is on both sides thereof. When the flue gas rises in the washing liquid, it will be hindered by the baffles 17 and change the flow direction, which is beneficial to increase the contact time of the flue gas with the washing liquid during the rising process, thereby further improving the flue gas treatment effect.

[0030] In order to achieve the purpose of improving the flue gas treatment effect, preferably, a branch pipe 18 extending into the interior of the smoke removal tower 1 is provided on the liquid supply pipe 5, and a nozzle 19 with a downward spraying direction is provided at the end of the branch pipe 18. The liquid supply pump 2 transports part of the washing liquid to the nozzle 19 through the branch pipe 18, and the washing liquid sprayed from the nozzle 19 contacts and mixes with the flue gas again, thereby further improving the flue gas treatment effect.

[0031] In order to achieve the purpose of improving the flue gas treatment effect, preferably, the interior of the smoke removal tower 1 is provided with an air flow distribution plate 20 located above the liquid level of the washing liquid and below the nozzle 19, and the surface of the air flow distribution plate 20 is provided with pores 21. The interior of the smoke removal tower 1 is provided with a packing layer 22 located between the air flow distribution plate 20 and the nozzle 19, and the interior of the packing layer 22 is filled with lightweight balls made of polyethylene, polypropylene, expanded polystyrene or porous rubber. The flue gas overflowing from the liquid level of the washing liquid inside the smoke removal tower 1 will rise evenly under the guidance of the surface pores 21 of the air flow distribution plate 20, and under the dispersion effect of the filler inside the packing layer 22, the contact area between the flue gas and the washing liquid sprayed from the nozzle 19 is increased, thereby improving the flue gas treatment effect. It is worth noting that the lightweight balls made of polyethylene, polypropylene, expanded polystyrene or porous rubber have a high porosity, a large specific surface area, and good surface wetting performance, which can increase the contact area between the flue gas and the washing liquid, and the flue gas purification is more thorough.

[0032] In order to save washing liquid, preferably, a sedimentation tank 24 is provided on the base 3, an overflow port 25 connected to the sedimentation tank 24 is provided on the side wall of the smoke removal tower 1, a reflux pipe 26 connected to the inside of the sedimentation tank 24 is provided on the liquid supply pump 2, a filter screen 27 is provided in the middle of the sedimentation tank 24, the reflux pipe 26 extends under the filter screen 27, a solid rotating shaft 28 is rotatably connected to the middle of the bottom wall of the sedimentation tank 24, the upper end of the solid rotating shaft 28 passes through the filter screen 27 and is provided with a cleaning brush 29, a driven pulley 30 is provided at the lower end of the solid rotating shaft 28, a driving pulley 31 is provided on the hollow rotating shaft 10, and a transmission connection is provided between the driving pulley 31 and the driven pulley 30. A belt 32 is connected. During the flue gas treatment process, the washing liquid in the smoke removal tower 1 enters the sedimentation tank 24 through the overflow port 25. The filter screen 27 in the sedimentation tank 24 blocks the impurity particles, and the clean detergent is stored under the filter screen 27 through the filter screen 27. The liquid supply pump 2 extracts the washing liquid under the filter screen 27 for secondary use, thereby improving the utilization rate of the washing liquid. In addition, the rotation of the hollow shaft 10 will drive the driving pulley 31 to rotate, and the driving pulley 31 drives the driven pulley 30 to rotate through the belt 32. The driven pulley 30 drives the cleaning brush 29 to rotate through the solid shaft 28, so as to clean the surface of the filter screen 27 and prevent the filter screen 27 from being blocked by oil.

[0033] In order to save washing liquid, preferably, a demister 23 is provided at the inner top of the smoke removal tower 1. The demister 23 is streamlined or folded. The demister 23 can separate the mist in the airflow and gather it to form washing liquid droplets. The washing liquid droplets fall into the washing liquid inside the smoke removal tower 1 under the action of gravity and are reused, thereby saving washing liquid.

[0034] Preferably, a drain pipe 34 is provided on the side wall of the sedimentation tank 24 , and a drain valve is provided on the drain pipe 34 , through which the washing waste liquid can be discharged and replaced with new washing liquid.

[0035] Preferably, a heat dissipation coil 33 is provided on the liquid supply pipe 5. Since the flue gas has a certain temperature, the heat dissipation coil 33 cools down and dissipates the washing liquid to avoid the continuous increase in the temperature of the washing liquid after multiple cycles. The higher the liquid temperature, the higher the temperature of the spray droplets, the easier it is to evaporate and reduce the volume of the droplets, thereby reducing the adsorption performance of particulate matter and grease in the flue gas. At the same time, it will accelerate the rise of the flue gas, shorten the adsorption time, and improve the adsorption performance of the reused washing liquid on particulate matter in the flue gas.

[0036] Compared with the prior art, the present invention is provided with a base 3, a smoke removal tower 1, a liquid supply pump 2, a pretreatment pipe 4, a liquid supply pipe 5, a smoke inlet pipe 6, a water wheel 7, a spiral conveying blade 8, a driving bevel gear 9, a hollow rotating shaft 10, a driven bevel gear 11, a hollow stirring blade 12 and a gas-liquid outlet 13. The smoke enters the pretreatment pipe 4 from the smoke inlet pipe 6, the liquid supply pump 2 pressurizes the washing liquid and enters the pretreatment pipe 4 from the liquid supply pipe 5, the washing liquid impacts the water wheel 7, so that the water wheel 7 drives the spiral conveying blade 8 and the driving bevel gear 9 to rotate, and the rotation of the spiral conveying blade 8 causes the smoke and the washing liquid to be preliminarily mixed in the pretreatment pipe 4, so that The oil stain is initially dissolved and purified, and then enters the hollow stirring blade 12 from the hollow rotating shaft 10, and is discharged into the washing liquid in the smoke removal tower 1 through the gas-liquid outlet 13 on the hollow stirring blade 12. The flue gas discharged from the gas-liquid outlet 13 generates a large number of bubbles in the washing liquid, and the active bevel gear 9 drives the driven bevel gear 11 to rotate, and the driven bevel gear 11 drives the hollow stirring blade 12 to rotate through the hollow rotating shaft 10, breaking up the bubbles to form smaller bubbles. These bubbles can increase the contact area between the flue gas and the washing liquid, so that the flue gas and the washing liquid are fully mixed and contacted again, which is beneficial to removing the oil stains and particulate matter in the flue gas, and the purification degree is high.

[0037] Compared with the prior art, the present invention improves the subsequent flue gas purification effect by initially mixing in the pretreatment tube 4, and prevents oil stains from clogging the gas-liquid outlet 13 by mixing the washing liquid with the flue gas and discharging them simultaneously from the gas-liquid outlet 13.

[0038] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An environmentally friendly smoke safety treatment and filtering device, comprising a base (3), a smoke removal tower (1) filled with a washing liquid, and a liquid supply pump (2) for circulating the washing liquid in the smoke removal tower (1), characterized in that: The smoke removal tower (1) is arranged on a base (3), a pretreatment pipe (4) is arranged inside the base (3), a liquid supply pipe (5) and a smoke inlet pipe (6) are arranged at one end of the pretreatment pipe (4), the liquid supply pipe (5) is connected to the liquid supply pump (2), the smoke inlet pipe (6) is connected to the public flue, a water wheel (7) is rotatably connected inside the pretreatment pipe (4), a spiral conveying blade (8) and a driving bevel gear (9) are coaxially arranged on the water wheel (7), and a screw conveying blade (8) and a driving bevel gear (9) are arranged on the pretreatment pipe (4). A hollow rotating shaft (10) is rotatably connected to one end of the smoke inlet pipe (6); a driven bevel gear (11) meshing with the driving bevel gear (9) is provided at the lower end of the hollow rotating shaft (10); the upper end of the hollow rotating shaft (10) extends into the interior of the smoke removal tower (1); and a hollow stirring blade (12) communicating with the interior of the hollow rotating shaft (10) is arranged on the hollow rotating shaft (10) located inside the smoke removal tower (1); and a gas-liquid outlet hole (13) communicating with the interior of the stirring blade (12) is arranged on the stirring blade (12).

2. The environmentally friendly smoke safety treatment and filtering device according to claim 1 is characterized in that: A plurality of support rods (14) are arranged on the inner wall of the smoke removal tower (1), and an annular cover (15) close to the inner bottom wall of the smoke removal tower (1) is arranged at the proximal ends of the plurality of support rods (14). A rectangular groove (16) is arranged in an annular shape on the edge of the annular cover (15), and the stirring blade (12) is located inside the annular cover (15).

3. The environmentally friendly smoke safety treatment and filtering device according to claim 1 or 2, characterized in that: A plurality of baffles (17) located below the level of the washing liquid are arranged above the annular cover (15).

4. The environmentally friendly smoke safety treatment and filtering device according to claim 3 is characterized in that: The liquid supply pipe (5) is provided with a branch pipe (18) extending into the interior of the smoke removal tower (1), and the end of the branch pipe (18) is provided with a spray head (19) with a spraying direction facing downward.

5. The environmentally friendly smoke safety treatment and filtering device according to claim 4 is characterized in that: An airflow distribution plate (20) is arranged inside the smoke removal tower (1) and is located above the level of the scrubbing liquid and below the nozzle (19). Air holes (21) are arranged on the surface of the airflow distribution plate (20).

6. The environmentally friendly smoke safety treatment and filtering device according to claim 5 is characterized in that: The smoke removal tower (1) is provided with a packing layer (22) between the airflow distribution plate (20) and the nozzle (19), and the packing layer (22) is filled with lightweight small balls made of polyethylene, polypropylene, expanded polystyrene or porous rubber.

7. The environmentally friendly smoke safety treatment and filtering device according to claim 6 is characterized in that: The base (3) is provided with a sedimentation tank (24), the side wall of the smoke removal tower (1) is provided with an overflow port (25) connected to the sedimentation tank (24), and the liquid supply pump (2) is provided with a reflux pipe (26) connected to the inside of the sedimentation tank (24).

8. The environmentally friendly smoke safety treatment and filtering device according to claim 7 is characterized in that: A filter screen (27) is provided in the middle of the sedimentation tank (24), and the reflux pipe (26) extends below the filter screen (27).

9. The environmentally friendly smoke safety treatment and filtering device according to claim 8 is characterized in that: A solid rotating shaft (28) is rotatably connected to the middle of the bottom wall of the sedimentation tank (24); the upper end of the solid rotating shaft (28) passes through a filter screen (27) and is provided with a cleaning brush (29); the lower end of the solid rotating shaft (28) is provided with a driven pulley (30); a driving pulley (31) is provided on the hollow rotating shaft (10); a belt (32) is transmission-connected between the driving pulley (31) and the driven pulley (30).

10. The environmentally friendly smoke safety treatment and filtering device according to claim 1 is characterized in that: A demister (23) is provided at the inner top of the smoke removal tower (1).

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