Waste gas treatment device in asphalt production

Abstract

The utility model provides a waste gas treatment device in asphalt production. The waste gas treatment device comprises a spray tank, a waste gas inlet pipe, a first spray pipe, a filler ball layer, a combustion chamber, a second spray pipe, a hose, a spray liquid system, a blow-off pipe, a gas outlet pipe, an activated carbon layer, a filter chamber and an exhaust pipe, according to the utility model, the spraying tank is arranged, smoke dust adsorption can be carried out on waste gas after combustion, the filler ball layer is arranged in the spraying tank, the contact duration and the contact area of spraying liquid and the combustion waste gas are increased, so that the smoke dust absorption quality is improved, and toxic gas adsorption is carried out on the sprayed combustion waste gas through the activated carbon layer; therefore, the phenomenon that a large number of smoke particles and some harmful substances in combustion waste gas flow into the atmosphere when a combustion method is adopted is eliminated.

Description

Technical Field

[0001] This utility model relates to the technical field of waste gas treatment equipment, specifically to a waste gas treatment device in asphalt production. Background Technology

[0002] In the production of various asphalt-based waterproofing materials, asphalt needs to be heated, transported, and processed into asphalt mixtures that meet various process requirements for production use. This process generates a large amount of asphalt fumes. These fumes contain various organic compounds, including carbocyclic hydrocarbons, cyclic hydrocarbon derivatives, and other compounds, many of which are harmful to human health. Asphalt fumes contain various polycyclic aromatic hydrocarbons such as benzo[a]pyrene, benz[a]anthracene, and carbazole, most of which are carcinogenic or potent carcinogens. One method for treating the waste gas generated during asphalt production is combustion. While this method can decompose a large amount of organic matter in the asphalt, the combustion process also produces a large amount of particulate matter and other harmful substances. Utility Model Content

[0003] The purpose of this utility model is to design a waste gas treatment device for asphalt production to solve the problems mentioned in the background art. To achieve the above objective, this utility model provides the following technical solution: It includes a waste gas inlet pipe connected to a spray tank, several first spray pipes installed at the top of the spray tank, and a packing ball layer installed inside the spray tank. The waste gas inlet pipe is connected to a combustion chamber. Several second spray pipes are fixedly connected to the bottom of the packing ball layer. Both the first and second spray pipes are connected to a spray liquid system via flexible hoses. A drain pipe is connected to the bottom of the spray tank. An outlet pipe is provided at the top of the spray tank, and the outlet pipe is connected to a filter chamber. A drying layer and an activated carbon layer are sequentially arranged inside the filter chamber. An exhaust pipe is provided at the end of the filter chamber opposite to the outlet pipe.

[0004] Furthermore, the bottom of the packing ball layer is provided with an opening and closing assembly for unloading the packing balls in the packing ball layer, the second spray pipe is installed at the bottom of the opening and closing assembly, and the lower part of the spray tank is provided with an opening and closing door.

[0005] Furthermore, the opening and closing assembly includes two rotating rods symmetrically distributed and rotatably connected to the inner wall of the spray tank. The two rotating rods are fixedly connected to a rotating plate, which has several through holes. The packing ball is located at the top of the rotating plate. One end of each of the two rotating rods penetrates the spray tank, and meshing gears are fixedly connected to the ends of the two rotating rods that penetrate the spray tank.

[0006] Furthermore, the opening and closing assembly also includes a fixed box fixed to the outer wall of the spray tank, and a motor is fixed inside the fixed box. The output end of the motor is connected to the end of one of the rotating rods.

[0007] Furthermore, the mounting box is also equipped with heat dissipation grooves.

[0008] Furthermore, a conical cover plate is fixed to the inner wall of the spray tank above the rotating rod, and the two rotating rods located inside the spray tank are both located inside the conical cover plate.

[0009] Furthermore, a perforated plate is also fixed to the inner wall of the spray tank located below the opening and closing door.

[0010] Furthermore, a ladder is fixed to the outer wall of the spray tank, and a platform is provided at the top of the ladder. An upwardly inclined feed cylinder is connected to the side wall of the spray tank located above the packing ball layer. An observation window is detachably connected to the end of the feed cylinder, and the observation window is located directly above the platform.

[0011] Furthermore, a vertical pipe is fixedly connected to the end of the exhaust gas inlet pipe, the top of the vertical pipe is provided with several first through holes, the bottom of the vertical pipe is fixedly connected with a baffle plate, and several second through holes are distributed circumferentially on the side of the vertical pipe.

[0012] Furthermore, the second through holes are all located below the exhaust gas inlet pipe.

[0013] Furthermore, the diameter of the first through hole is smaller than the diameter of the second through hole.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model is equipped with a spray tank, which can adsorb soot in the exhaust gas after combustion. The spray tank is equipped with a layer of packing balls, which increases the contact time and contact area between the spray liquid and the exhaust gas, thereby improving the quality of soot absorption. The exhaust gas after spraying is then adsorbed by the activated carbon layer for toxic gases. Therefore, this utility model eliminates the problem of a large number of soot particles and some harmful substances in the exhaust gas flowing into the atmosphere when the combustion method is used. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of the spray tank;

[0017] Figure 2 This is a partial cross-sectional view of the spray tank;

[0018] Figure 3 This is another partial cross-sectional view of the spray tank.

[0019] The components are as follows: 1. Exhaust pipe; 2. Spray tank; 3. Observation window; 4. Feed cylinder; 5. Platform; 6. Fixed box; 7. Exhaust gas inlet pipe; 8. Heat dissipation trough; 9. Opening and closing door; 10. Ladder; 11. Sewage pipe; 12. First spray pipe; 13. Motor; 14. Rotating plate; 15. Conical cover plate; 16. First through hole; 17. Vertical pipe; 18. Air baffle plate; 19. Second through hole; 20. Mesh plate; 21. Second spray pipe; 22. Rotating rod. Detailed Implementation

[0020] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0021] Example: Please refer to Figure 1-3 A waste gas treatment device for asphalt production includes a waste gas inlet pipe 7 connected to a spray tank 2, several first spray pipes 12 installed at the top of the spray tank 2, and a packing ball layer installed inside the spray tank 2. The waste gas inlet pipe 7 is connected to a combustion chamber. Several second spray pipes 21 are fixed to the bottom of the packing ball layer to improve the adsorption quality of smoke and dust. Both the first spray pipes 12 and the second spray pipes 21 are connected to a spray liquid system via flexible hoses. A drain pipe 11 is connected to the bottom of the spray tank 2, and an outlet pipe 1 is provided at the top of the spray tank 2. The outlet pipe 1 is connected to a filter chamber. The filter chamber has a drying layer and an activated carbon layer arranged sequentially inside. An exhaust pipe is provided at the end of the filter chamber away from the outlet pipe 1. The combustion chamber and the spray liquid system use common equipment. The spray liquid system is a common spray liquid system for adsorbing smoke and dust, which will not be discussed further here. The combustion chamber burns the waste gas produced during asphalt production, thereby decomposing a large amount of organic matter in the asphalt. The soot particles and some harmful substances produced after combustion enter the spray tank 2 through the waste gas inlet pipe 7 and are sprayed out of the spray pipe to spray the waste gas, thereby eliminating the soot in the waste gas after combustion. The packing ball layer increases the contact time and contact area between the spray liquid and the combustion waste gas, thereby improving the quality of soot absorption. The combustion waste gas after spraying will be adsorbed by the activated carbon layer for toxic gases and then flow out through the exhaust pipe. Therefore, this invention eliminates the large amount of soot particles and some harmful substances in the combustion waste gas that flow into the atmosphere when the combustion method is used. In addition, the drying layer can dry the combustion waste gas after spraying and improve the service life of the activated carbon layer. The drying layer can be made of soda lime.

[0022] After the device has been used for a period of time, some impurities, such as oil and soot, will adhere to the surface of the packing balls, which can easily affect the purification quality of the exhaust gas after combustion. Therefore, the packing balls need to be replaced. Since the packing balls are located in the middle of the spray tank 2, which is relatively high, it is extremely inconvenient to unload the packing balls. Therefore, in this embodiment, the bottom of the packing ball layer is provided with an opening and closing assembly for unloading the packing balls in the packing ball layer. The second spray pipe 21 is installed at the bottom of the opening and closing assembly. The lower part of the spray tank 2 is provided with an opening and closing door 9. The opening and closing assembly includes two rotating rods 22 that are symmetrically distributed and rotatably connected to the inner wall of the spray tank 2. The two rotating rods 22 are fixedly connected to a rotating plate 14. The rotating plate 14 is provided with several through holes. At the top of the rotating plate 14, one end of each of the two rotating rods 22 penetrates the spray tank 2. Gears meshing with each other are fixedly connected to the ends of the two rotating rods 22 penetrating the spray tank 2. The opening and closing assembly also includes a fixed box 6 fixed to the outer wall of the spray tank 2. A motor 13 is fixedly connected inside the fixed box 6. The output end of the motor 13 is connected to the end of one of the rotating rods 22. Therefore, when the motor 13 starts, the rotating rods 22 and the rotating plate 14 rotate. Under the action of gear meshing, the rotation of the two rotating rods 22 is opposite. Therefore, when the rotating plate 14 rotates downwards, the packing balls will fall from the packing ball layer and into the bottom of the spray tank 2. At this time, the opening and closing door 9 can be opened to remove the packing balls that need to be replaced. This design facilitates the replacement of the packing balls; the fixed box 6 is also equipped with a heat dissipation groove 8 to facilitate the heat dissipation of the motor 13; and the inner wall of the spray tank 2 located below the opening and closing door 9 is also fixed with a mesh plate 20, which can separate the wastewater at the bottom of the spray tank 2 from the fallen packing balls, making it easy to remove the packing balls; a conical cover plate 15 is also fixed to the inner wall of the spray tank 2 above the rotating rod 22, and the two rotating rods 22 located inside the spray tank 2 are both located inside the conical cover plate 15, thereby preventing the original packing balls from getting stuck between the two rotating rods 22 when replacing the packing balls; and a ladder 10 is fixed to the outer wall of the spray tank 2, with a platform 5 at the top of the ladder 10, and an inclined road is connected to the side wall of the spray tank 2 above the packing ball layer. The feed cylinder 4 is located on the upper part of the platform 5. The end of the feed cylinder 4 is equipped with a detachable observation window 3, which is detachable by bolt connection. The observation window 3 is located directly above the platform 5, which facilitates the filling of new packing balls and observation of the interior of the spray tank 2. The end of the exhaust gas inlet pipe 7 is fixedly connected to a vertical pipe 17. The top of the vertical pipe 17 is provided with several first through holes 16, and the bottom of the vertical pipe 17 is fixedly connected to a baffle plate 18. Several second through holes 19 are distributed circumferentially on the side of the vertical pipe 17. The second through holes 19 are all located below the exhaust gas inlet pipe 7. The diameter of the first through holes 16 is smaller than the diameter of the second through holes 19, so that the exhaust gas after combustion can flow evenly to the packing ball layer, thereby improving the service life of the packing balls and improving the quality of flue gas purification.

[0023] The working principle of this embodiment: The smoke particles and some harmful substances generated by the combustion exhaust gas first enter the spray tank 2 through the exhaust gas inlet pipe 7 and the vertical pipe 17. They are then sprayed out of the spray tank 2 through the spray pipe to spray the exhaust gas, thereby eliminating the smoke particles in the combustion exhaust gas. The packing ball layer increases the contact time and contact area between the spray liquid and the combustion exhaust gas, thus improving the quality of smoke absorption. After spraying, the combustion exhaust gas will sequentially pass through the drying layer and the activated carbon layer for adsorption of toxic gases, and then flow out through the exhaust pipe. Therefore, this invention eliminates the problem of a large amount of smoke particles and some harmful substances in the combustion exhaust gas flowing into the atmosphere when using the combustion method.

[0024] When it is necessary to replace the packing balls, simply start the motor 13. The rotating rod 22 and the rotating plate 14 will rotate. Under the action of gear meshing, the two rotating rods 22 rotate in opposite directions. Therefore, when the rotating plate 14 rotates downward, the packing balls will fall from the packing ball layer and fall into the mesh plate 20. At this time, open the opening and closing door 9 to take out the packing balls that need to be replaced. Then the motor 13 reverses, the rotating plate 14 resets, and then the operator opens the observation window 3 and adds the packing balls from the feed cylinder 4 to the rotating plate 14.

[0025] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "upper," "lower," "left," "right," "front," "back," and similar expressions used in this document are for illustrative purposes only.

[0026] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A waste gas treatment device for asphalt production, characterized in that: The system includes an exhaust gas inlet pipe (7) connected to the spray tank (2), several first spray pipes (12) installed at the top of the spray tank (2), and a packing ball layer installed inside the spray tank (2). The exhaust gas inlet pipe (7) is connected to the combustion chamber. Several second spray pipes (21) are fixed to the bottom of the packing ball layer. The first spray pipes (12) and the second spray pipes (21) are both connected to the spray liquid system through hoses. A drain pipe (11) is connected to the bottom of the spray tank (2). An exhaust pipe (1) is provided at the top of the spray tank (2). The exhaust pipe (1) is connected to a filter chamber with an activated carbon layer. An exhaust pipe is provided at the end of the filter chamber away from the exhaust pipe (1). An opening and closing assembly for unloading the packing balls in the packing ball layer is provided at the bottom of the packing ball layer. The second spray pipes (21) Installed at the bottom of the opening and closing assembly, the spray tank (2) is provided with an opening and closing door (9) at the bottom. The opening and closing assembly includes two rotating rods (22) symmetrically distributed and rotatably connected to the inner wall of the spray tank (2). The two rotating rods (22) are fixedly connected to a rotating plate (14). The rotating plate (14) is provided with several through holes. The packing ball is located at the top of the rotating plate (14). One end of each of the two rotating rods (22) penetrates the spray tank (2). The ends of the two rotating rods (22) penetrating the spray tank (2) are respectively fixedly connected to meshing gears. The opening and closing assembly also includes a fixed box (6) fixedly connected to the outer wall of the spray tank (2). A motor (13) is fixedly connected inside the fixed box (6). The output end of the motor (13) is connected to the end of one of the rotating rods (22).

2. The waste gas treatment device in asphalt production according to claim 1, characterized in that: Above the rotating rod (22) is a conical cover plate (15) fixed to the inner wall of the spray tank (2), and the two rotating rods (22) located inside the spray tank (2) are both located inside the conical cover plate (15).

3. The waste gas treatment device in asphalt production according to claim 1, characterized in that: A perforated plate (20) is also fixed to the inner wall of the spray tank (2) located below the opening and closing door (9).

4. The waste gas treatment device in asphalt production according to claim 1, characterized in that: A ladder (10) is fixed to the outer wall of the spray tank (2). A platform (5) is provided at the top of the ladder (10). An inclined feed cylinder (4) is connected to the side wall of the spray tank (2) above the packing ball layer. An observation window (3) is detachably connected to the end of the feed cylinder (4). The observation window (3) is located directly above the platform (5).

5. The waste gas treatment device in asphalt production according to claim 1, characterized in that: The exhaust gas inlet pipe (7) is fixedly connected to a vertical pipe (17) at its end. The top of the vertical pipe (17) is provided with several first through holes (16). The bottom of the vertical pipe (17) is fixedly connected with a baffle plate (18). The side of the vertical pipe (17) is circumferentially distributed with several second through holes (19).

6. The waste gas treatment device in asphalt production according to claim 5, characterized in that: The second through hole (19) is located below the exhaust gas inlet pipe (7).

7. The waste gas treatment device in asphalt production according to claim 5, characterized in that: The diameter of the first through hole (16) is smaller than the diameter of the second through hole (19).

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