Waste gas collection and treatment device for PE film processing

Abstract

A waste gas collection and treatment device for PE film processing is used for solving the problems that oligomer oil mist and carbonized smoke in waste gas generated after polyethylene resin in a waste gas treatment device in the prior art are not removed in advance and directly enter an activated carbon adsorption system, so that the service life of the activated carbon adsorption system is short, and the waste gas cannot be recycled. The device comprises a spraying tower and a purifying box communicated with the bottom of the spraying tower, a stirring paddle used for accelerating fusion of waste gas and liquid in the purifying box is rotationally arranged in the purifying box, a filtering box is fixedly arranged on one side of the purifying box, and a gas inlet pipe used for allowing the waste gas to enter is arranged at the bottom of the filtering box in a communicated mode; a circulation pipe is arranged between the top of the filter box and the purification box in a communicating mode, a first filter screen used for filtering waste gas is arranged in the filter box and located between the gas inlet pipe and the circulation pipe, a cleaning brush used for cleaning the first filter screen is rotationally arranged in the filter box, and a driving assembly used for driving the stirring paddle and the cleaning brush to rotate is arranged on the purification box.

Description

Technical Field

[0001] The invention relates to the technical field of waste gas treatment, and in particular to a waste gas collection and treatment device for PE film processing. Background Art

[0002] PE film, also known as polyethylene film, refers to a film produced from PE particles. PE film is moisture-proof and has low moisture permeability. Polyethylene film (PE) can be made into products with different properties such as low-density, medium-density, high-density polyethylene and cross-linked polyethylene according to different manufacturing methods and control methods.

[0003] The waste gas treatment device of the prior art, such as the utility model patent document with authorization announcement number "CN219949751U" and patent name "A tail gas treatment equipment for polyethylene production", discloses a waste gas treatment device, including a waste gas treatment box, a convenient replacement mechanism and a powder filtering mechanism; the waste gas treatment box: a treatment tank is opened inside, and an avoidance groove is opened at the middle end of the waste gas treatment box; the convenient replacement mechanism: it is arranged at the middle end of the bottom wall of the treatment tank, and the middle end of the convenient replacement mechanism is slidably connected with the inside of the avoidance groove; the powder filtering mechanism: it is arranged at the front end of the bottom wall of the treatment tank, and the lower end of the powder filtering mechanism is installed in cooperation with the discharge port opened on the bottom wall of the waste gas treatment box.

[0004] In the above patent documents, the oligomer oil mist and carbonized smoke in the exhaust gas generated after the polyethylene resin is heated and melted are not removed in advance, and directly enter the activated carbon adsorption system, condense and recombine on the surface of the activated carbon, which can easily cause the activated carbon adsorption system to be blocked, resulting in a short service life of the activated carbon adsorption system and the need for frequent replacement of activated carbon. Summary of the invention

[0005] The purpose of the present invention is to address the deficiencies in the prior art and to propose a waste gas collection and treatment device for PE film processing, which is used to solve the technical problem mentioned in the background technology that in the waste gas treatment device of the prior art, the oligomer oil mist and carbonized smoke in the waste gas generated after the polyethylene resin is heated and melted are not removed in advance, but directly enter the activated carbon adsorption system, condense and recombine on the surface of the activated carbon, which easily causes the activated carbon adsorption system to be blocked, resulting in a short service life of the activated carbon adsorption system and the need for frequent replacement of activated carbon.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions:

[0007] A waste gas collection and treatment device for PE film processing, comprising a spray tower and a purification box connected to the bottom of the spray tower, a stirring paddle rotatably provided in the purification box for accelerating the fusion of waste gas and liquid in the purification box, a filter box fixedly provided on one side of the purification box, an air inlet pipe for the entry of waste gas is provided at the bottom of the filter box, a flow pipe is provided between the top of the filter box and the purification box, a first filter screen for filtering waste gas is provided in the filter box and the first filter screen is located between the air inlet pipe and the flow pipe, a cleaning brush for cleaning the first filter screen is rotatably provided in the filter box, and a driving assembly for driving the stirring paddle and the cleaning brush to rotate is provided on the purification box.

[0008] Working principle:

[0009] First, the operator discharges the exhaust gas into the filter box through the air intake pipe. The first filter in the filter box can filter the exhaust gas and adsorb the carbides remaining in the exhaust gas. The filtered exhaust gas is guided to the purification box through the flow pipe. Then the operator injects water into the purification box, and the exhaust gas merges with the water in the purification box. The water can adsorb the oligomer oil mist remaining in the exhaust gas. The driving component can drive the stirring paddle to accelerate the fusion of the exhaust gas and water, and accelerate the adsorption of the oligomer oil mist. The cleaning brush can clean the first filter under the action of the driving component. After that, the exhaust gas flows through the purification box to the spray tower. The spray tower sprays the exhaust gas again to further reduce the carbonized smoke and oil mist remaining in the exhaust gas. Finally, the treated exhaust gas is discharged to the outside through the spray tower.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] First, a filter box and a first filter screen are provided. The first filter screen can absorb carbonized smoke in the exhaust gas to reduce the content of carbonized smoke in the exhaust gas.

[0012] Second, it is equipped with a purification box and a stirring paddle, which can accelerate the fusion of water and exhaust gas and accelerate the adsorption of residual oil mist in the exhaust gas.

[0013] Third, a driving assembly is provided, which can drive the stirring paddle to stir, and the driving assembly can drive the cleaning brush to clean the first filter, thereby extending the service life of the first filter.

[0014] Fourth, a spray tower is provided, which can filter the exhaust gas passing through the filter box and the purification box again, further reducing the content of oil mist and carbonized smoke in the exhaust gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0016] Figure 2 It is a schematic diagram of the cross-sectional structure of the purification box, the filter box and the filter pool;

[0017] Figure 3 It is a schematic diagram of the cross-sectional structure of the spray tower.

[0018] Explanation of the reference numerals: spray tower 1, purification box 2, stirring paddle 3, filter box 4, air inlet pipe 5, circulation pipe 6, first filter screen 7, cleaning brush 8, first motor 9, rotating shaft 10, first bevel gear 11, second bevel gear 12, rotating shaft 13, first exhaust pipe 14, rotating rod 15, guide fan 16, third bevel gear 17, filter tank 18, second filter screen 19, first return pipe 20, water pump 21, second return pipe 22, water outlet 23, grille plate 24, filling barrel 25, spray disc 26, spray head 27, water tank 28, water inlet pipe 29, negative pressure fan 30, second exhaust pipe 31, air outlet pipe 32, water outlet 33. DETAILED DESCRIPTION

[0019] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Example:

[0021] like Figure 1 and Figure 2 As shown, a waste gas collection and treatment device for PE film processing includes a spray tower 1 and a purification box 2 connected to the bottom of the spray tower 1. A stirring paddle 3 is rotatably provided in the purification box 2 for accelerating the fusion of the waste gas and the liquid in the purification box 2. The stirring paddle 3 can accelerate the fusion of the waste gas and water and reduce the oil mist in the waste gas. A filter box 4 is fixedly provided on one side of the purification box 2. An air intake pipe 5 for the waste gas to enter is connected to the bottom of the filter box 4. The waste gas can be sucked into the air intake pipe 5 through an external air suction device and discharged into the filter box 4 through the air intake pipe 5.

[0022] like Figure 1 and Figure 2 As shown, a flow pipe 6 is provided between the top of the filter box 4 and the purification box 2, and the air outlet end of the flow pipe 6 is below the water surface. A first filter screen 7 for filtering exhaust gas is provided in the filter box 4, and the first filter screen 7 is located between the air inlet pipe 5 and the flow pipe 6. The exhaust gas in the filter box 4 can be filtered through the first filter screen 7 to reduce the carbonized smoke and other substances remaining in the flue gas. The filtered exhaust gas can enter the purification box 2 through the flow pipe 6 to process the exhaust gas again. A cleaning brush 8 for cleaning the first filter screen 7 is rotatably provided in the filter box 4. The surface of the first filter screen 7 can be cleaned by the cleaning brush 8 to avoid the accumulation of impurities on the surface of the first filter screen 7 and extend the service life of the first filter screen 7. The filter box 4 is a hollow cylindrical shape, and the first filter screen 7 fits the inner wall of the filter box 4.

[0023] like Figure 1 and Figure 2As shown, the purification box 2 is provided with a driving assembly for driving the stirring paddle 3 and the cleaning brush 8 to rotate, and the driving assembly includes a first motor 9, a rotating shaft 10, a first bevel gear 11, a second bevel gear 12 and a rotating shaft 13. The first motor 9 is fixedly mounted on the purification box 2, and the rotating shaft 10 is rotatably mounted on the purification box 2. The bottom of the rotating shaft 10 extends vertically into the purification box 2. The first bevel gear 11 is fixedly mounted on the output end of the first motor 9, and the second bevel gear 12 is fixedly mounted on the rotating shaft 10 and the second bevel gear 12 is meshed with the first bevel gear 11. The stirring paddle 3 is fixedly mounted on a section of the rotating shaft 10 located in the purification box 2. The first motor 9 drives the first bevel gear 11 to rotate. The wheel 11 can drive the second bevel gear 12 and the rotating shaft 10 to rotate, and the stirring paddle 3 can be driven by the rotation of the rotating shaft 10. The rotating shaft 13 is coaxial with the rotating shaft 10 and is fixedly arranged at the bottom end of the rotating shaft 10. The rotating shaft 13 slides through the purification box 2 and extends into the filter box 4. The cleaning brush 8 slides through the first filter screen 7 and is fixedly connected to the rotating shaft 13. The connection between the rotating shaft 13 and the filter box 4 and the purification box 2 is connected through bearings, and sealing rings are provided at the connection between the purification box 2 and the filter box 4 to prevent water in the purification box 2 from entering the filter box 4. The cleaning brush 8 can be driven to clean the first filter screen 7 by driving the rotating shaft 10.

[0024] like Figure 1 and Figure 2 As shown, a first exhaust pipe 14 is provided between the spray tower 1 and the purification box 2, and the exhaust pipe can be used to discharge the preliminarily treated exhaust gas in the purification box 2 into the spray tower 1. A rotating rod 15 is rotatably provided in the first exhaust pipe 14, and a guide fan 16 is fixedly provided on the rotating rod 15. A third bevel gear 17 is fixedly provided at the end of the rotating rod 15, and the third bevel gear 17 is meshed with the second bevel gear 12. The third bevel gear 17 and the rotating rod 15 can be driven to rotate through the second bevel gear 12, thereby rotating and driving the fan to rotate, and the exhaust gas in the purification box 2 flows into the spray tower 1.

[0025] like Figure 1 and Figure 2As shown, a filter pool 18 is provided on one side of the purification box 2, a second filter screen 19 is provided in the filter pool 18, a first return pipe 20 is provided on the top of the filter pool 18 and the side wall of the purification box 2, when the water level in the purification box 2 is higher than the first return pipe 20, the water in the purification box 2 can enter the filter pool 18 through the first return pipe 20, the second filter screen 19 can filter the waste water, a water pump 21 is provided at the bottom of the filter pool 18, a second return pipe 22 is provided on the water outlet of the water pump 21, and the rotating shaft 10 is a hollow structure, the second return pipe 22 is connected to the top of the rotating shaft 10 away from the end of the water pump 21, and a plurality of water outlet holes 23 are opened on the rotating shaft 10. The filtered water falls to the bottom of the filter pool 18 through the second filter screen 19. The water pump 21 can make the water at the bottom of the filter pool 18 flow back to the rotating shaft 10 through the second return pipe 22. A bearing is provided at the connection between the rotating shaft 10 and the second water flow pipe. The water outlet holes 23 on the rotating shaft 10 can guide the filtered water to the purification box 2.

[0026] like Figure 1 and Figure 3 As shown, a plurality of grid plates 24 are fixedly arranged in the spray tower 1, a filling barrel 25 is fixedly arranged on the plurality of grid plates 24, an activated carbon adsorption layer is arranged in the plurality of filling barrels 25, and the activated carbon can further adsorb the impurities remaining in the exhaust gas, a plurality of grid plates 24 are provided with a spray plate 26 on the side away from the filling barrel 25, a plurality of spray heads 27 are arranged on the spray plate 26, a water tank 28 is arranged outside the spray tower 1, a water inlet pipe 29 is arranged on the water tank 28, and a plurality of water outlets 33 on the water inlet pipe 29 are respectively connected to the plurality of spray plates 26, and the water tank 28 pumps water through an external water flow pumping device. The water flow is directed to the water inlet pipe 29, and the water flow in the water inlet pipe 29 enters the spray plate 26 through the water outlet 33. Finally, the water flows through the spray head 27 to treat the exhaust gas in the spray tower 1 again. A negative pressure fan 30 is provided on one side of the spray tower 1, and a second exhaust pipe 31 is provided on the top of the spray tower 1. The other end of the second exhaust pipe 31 is fixedly connected to the air inlet of the negative pressure fan 30, and an exhaust pipe 32 is fixedly installed on the air outlet of the negative pressure fan 30. The treated exhaust gas flows from the second exhaust pipe 31 to the exhaust pipe 32 through the negative pressure fan 30 and is finally discharged to the outside.

[0027] Working principle:

[0028] First, the operator sucks the exhaust gas into the intake pipe 5 through the external suction device, and then the operator starts the first motor 9, the first motor 9 drives the first bevel gear 11, the first bevel gear 11 drives the rotating shaft 10 and the rotating shaft 13 to rotate, the exhaust gas passes through the first filter 7 and moves toward the flow pipe 6, the rotating shaft 13 drives the cleaning brush 8 to clean the first filter 7, the exhaust gas flows through the flow pipe 6 to the liquid in the purification box 2, the rotating shaft 10 drives the stirring paddle 3 to accelerate the fusion of the exhaust gas and the liquid, and then the exhaust gas flows toward the spray tower 1 through the first exhaust pipe 14. When the exhaust gas flows toward the spray tower 1, the second bevel gear 12 drives the third bevel gear 17, and the third bevel gear 17 drives The rotating rod 15 and the guide fan 16 rotate to speed up the flow of the exhaust gas. When the exhaust gas flows into the spray tower 1, the operator uses an external pumping device to make the liquid in the water tank 28 flow to the spray plate 26 through the outlet 33 on the water inlet pipe 29. The spray head 27 on the spray plate 26 can spray the exhaust gas in the spray tower 1 to further reduce the content of impurities in the exhaust gas. When the exhaust gas passes through several filling barrels 25, the activated carbon in the filling barrels 25 will adsorb the impurities in the exhaust gas again. Finally, the operator starts the negative pressure fan 30, and the negative pressure fan 30 makes the exhaust gas in the spray tower 1 flow from the second exhaust pipe 31 to the outlet pipe 32, and discharges the exhaust gas in the spray tower 1 to the external space.

[0029] When the liquid level in the purification box 2 is higher than the first return pipe 20, the liquid in the purification box 2 flows into the filter tank 18 through the first return pipe 20, and the second filter screen 19 in the filter tank 18 can filter the liquid. The filtered liquid moves toward the second return pipe 22 through the water pump 21, and finally the liquid in the second return pipe 22 flows into the purification box 2 through the water outlet 23 on the rotating shaft 10, completing the circulation filtration of the liquid.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A waste gas collection and treatment device for PE film processing, characterized in that: The invention comprises a spray tower (1) and a purification box (2) connected to the bottom of the spray tower (1); a stirring paddle (3) for accelerating the fusion of waste gas and liquid in the purification box (2) is rotatably provided in the purification box (2); a filter box (4) is fixedly provided on one side of the purification box (2); an air inlet pipe (5) for waste gas to enter is rotatably provided in the bottom of the filter box (4); a flow pipe (6) is rotatably provided between the top of the filter box (4) and the purification box (2); a first filter screen (7) for filtering waste gas is rotatably provided in the filter box (4); and a cleaning brush (8) for cleaning the first filter screen (7) is rotatably provided in the filter box (4); and a driving assembly for driving the stirring paddle (3) and the cleaning brush (8) to rotate is provided on the purification box (2).

2. The waste gas collection and treatment device for PE film processing according to claim 1, characterized in that: The driving assembly comprises a first motor (9), a rotating shaft (10), a first bevel gear (11), a second bevel gear (12) and a rotating shaft (13); the first motor (9) is fixedly mounted on the purification box (2); the rotating shaft (10) is rotatably mounted on the purification box (2); the bottom of the rotating shaft (10) vertically extends into the purification box (2); the first bevel gear (11) is fixedly mounted on the output end of the first motor (9); the second bevel gear (12) is fixedly mounted on the rotating shaft (10) and the second bevel gear (12) is meshed with the first bevel gear (11); the stirring paddle (3) is fixedly mounted on a section of the rotating shaft (10) located in the purification box (2); the rotating shaft (13) is coaxial with the rotating shaft (10) and fixedly mounted on the bottom end of the rotating shaft (10); the rotating shaft (13) slides through the purification box (2) and extends into the filter box (4); the cleaning brush (8) slides through the first filter screen (7) and is fixedly connected to the rotating shaft (13).

3. The waste gas collection and treatment device for PE film processing according to claim 2, characterized in that: A first exhaust pipe (14) is provided between the spray tower (1) and the purification box (2), a rotating rod (15) is rotatably provided in the first exhaust pipe (14), a guide fan (16) is fixedly provided on the rotating rod (15), a third bevel gear (17) is fixedly provided at the end of the rotating rod (15), and the third bevel gear (17) is meshed with the second bevel gear (12).

4. The waste gas collection and treatment device for PE film processing according to claim 2, characterized in that: A filter pool (18) is provided on one side of the purification box (2), a second filter screen (19) is provided in the filter pool (18), and a first return pipe (20) is provided on the top of the filter pool (18) and connected to the side wall of the purification box (2).

5. The waste gas collection and treatment device for PE film processing according to claim 4 is characterized in that: A water pump (21) is provided at the bottom of the filter pool (18), a second return pipe (22) is provided at the water outlet end of the water pump (21), the rotating shaft (10) is a hollow structure, the second return pipe (22) is connected to the top of the rotating shaft (10) at the end away from the water pump (21), and a plurality of water outlet holes (23) are provided on the rotating shaft (10).

6. The waste gas collection and treatment device for PE film processing according to claim 1, characterized in that: A plurality of grid plates (24) are fixedly arranged in the spray tower (1), a filling barrel (25) is fixedly arranged on the plurality of grid plates (24), a spray plate (26) is arranged on the side of the plurality of grid plates (24) away from the filling barrel (25), a plurality of spray heads (27) are arranged on the spray plate (26), a water tank (28) is arranged outside the spray tower (1), a water inlet pipe (29) is arranged on the water tank (28), and a plurality of water outlets (33) on the water inlet pipe (29) are respectively connected to the plurality of spray plates (26).

7. The waste gas collection and treatment device for PE film processing according to claim 6, characterized in that: A negative pressure fan (30) is provided on one side of the spray tower (1), a second exhaust pipe (31) is provided on the top of the spray tower (1), the other end of the second exhaust pipe (31) is fixedly connected to the air inlet of the negative pressure fan (30), and an air outlet pipe (32) is fixedly installed on the air outlet of the negative pressure fan (30).

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