Waste gas treatment device for asphalt production

Abstract

The utility model provides a waste gas treatment device for asphalt production, which relates to the technical field of asphalt waste gas treatment and comprises a shell, the bottom of the shell is communicated with a gas inlet pipe, the top of the shell is fixedly connected with a top cover, the top of the top cover is communicated with a gas outlet pipe, the inner side of the shell is slidably connected with an electrostatic dust collector main body, and the inner side of the shell is provided with a waste heat recovery mechanism; the outer side of the partition plate is fixedly connected with the inner side of the shell. According to the utility model, multiple heating cylinders are matched with a double-layer heat conduction disc structure, so that the waste gas heat exchange area is increased, waste heat is efficiently converted into hot water for production, fuel consumption is reduced, waste gas enters a purification link after being cooled, loss of an electrostatic dust collector and an activated carbon plate caused by high temperature is reduced, and the service life of equipment is prolonged; the double activated carbon plates are adopted for alternate operation, the penetration risk caused by adsorption saturation is avoided, continuous use of the activated carbon plates is achieved on the premise that standard emission of tail gas is guaranteed, and the continuity of the production process is effectively guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of asphalt production waste gas treatment technology, and in particular to a waste gas treatment device for asphalt production. Background Technology

[0002] Currently, asphalt concrete production generates dust and exhaust gas, especially the exhaust gas from asphalt itself, which causes significant air pollution. Proper treatment is necessary before emissions meet standards. Traditionally, the exhaust gas is directly passed into a plasma purification machine for oxidation treatment before being released. However, the exhaust gas and dust generated during the heating and mixing process of existing asphalt concrete production have a certain degree of adhesion. While the plasma purification machine has a filter at the inlet to physically filter the dust in the exhaust gas, the adhesive nature of the mixed asphalt exhaust gas and dust causes a large amount of impurities to adhere to the filter, affecting its permeability and thus reducing treatment efficiency. Furthermore, the filter needs to be replaced every few days, resulting in frequent and costly replacements.

[0003] Existing technology, patent number CN219168033U, discloses a waste gas treatment device for asphalt concrete production. This device first filters the waste gas and dust through multiple coarse filter boxes, significantly reducing the load on the filter screens and minimizing the need for frequent screen replacements. The coarse filter boxes are filled with crushed stone, which adsorbs sticky impurities from the waste gas and dust. After a period of use, the adsorbed crushed stone can be recycled as aggregate in asphalt concrete production; new crushed stone is simply added to the coarse filter boxes, eliminating the cost of replacing the filter material inside. However, in the existing technology, the waste gas itself contains relatively high heat due to the production process. This heat is not significantly reduced during multiple filtrations. This heat not only leads to waste but also negatively impacts the filter components in the waste gas treatment device, reducing their lifespan. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing technology and provide a waste gas treatment device for asphalt production.

[0005] This utility model is achieved through the following technical solution:

[0006] A waste gas treatment device for asphalt production includes a shell, an air inlet pipe connected to the bottom of the shell, a top cover fixedly connected to the top of the shell, an air outlet pipe connected to the top of the top cover, an electrostatic precipitator body slidably connected to the inner side of the shell, and a waste heat recovery mechanism disposed on the inner side of the shell. The waste heat recovery mechanism includes a partition plate, the outer side of which is fixedly connected to the inner side of the shell, a plurality of air guide pipes fixedly connected to the top of the partition plate, a positioning frame fixedly connected to the inner side of the shell, and a water inlet pipe fixedly connected to one side of the shell, one end of which penetrates the inner wall of the shell and extends to the outer shell. On the outer side, multiple branch pipes are fixedly connected to the other end of the water inlet pipe. A heating cylinder is fixedly connected to one end of each branch pipe. A heat-conducting plate one and a heat-conducting plate two are fixedly connected to the outer side of the heating cylinder. The heat-conducting plate one and the heat-conducting plate two are distributed from bottom to top on the outer side of the heating cylinder. One end of the water inlet pipe is connected to the water inlet pipe. A merging pipe is fixedly connected to the top of the heating cylinder. A water outlet pipe is fixedly connected to one end of the merging pipe. One end of the water outlet pipe penetrates the inner wall of the outer shell and extends to the outer side of the outer shell. One end of the water outlet pipe is connected to the input end of the waste heat boiler. A waste gas treatment mechanism is provided on the inner side of the outer shell.

[0007] As can be seen, in the above technical solution, the exhaust gas can be concentrated and moved to the positions of multiple heating cylinders by the convergence and guidance of multiple air guide pipes, thereby improving the contact efficiency between the exhaust gas and the heating cylinders and improving the heat exchange efficiency between the heat in the exhaust gas and the water inside the heating cylinders, heat conduction plate one and heat conduction plate two.

[0008] Optionally, in one possible implementation, the exhaust gas treatment mechanism includes a fixed rod, the outer side of which is fixedly connected to the inner side of the air inlet pipe, a dispersion disc fixedly connected to the top of the fixed rod, the dispersion disc having a conical cross-section, three drawers slidably connected to the bottom of the outer casing, a placement plate snapped into the bottom of each drawer, the surface of the placement plate being covered with gravel, multiple slots being formed on the outer side of the placement plate, a protective shell fixedly connected to the top of the top cover, a servo motor fixedly connected to the inner side of the protective shell, a gear fixedly connected to the output end of the servo motor, a support plate slidably connected to the inner side of the top cover, multiple toothed grooves being formed on one side of the support plate, the inner side of the toothed grooves meshing with one side of the gear, and two activated carbon plates snapped into the top of the support plate.

[0009] As can be seen, in the above technical solution, the reciprocating movement of the pallet allows the two activated carbon plates to be replaced and used alternately, reducing equipment downtime and maintaining good waste gas treatment efficiency.

[0010] The beneficial effects of this utility model are:

[0011] This invention, by setting up a waste heat recovery mechanism, can convert part of the heat in the waste gas into production water required for production, compared with the prior art. By using heat-conducting plate one and heat-conducting plate two to increase the contact area between the waste gas and the heating cylinder, the efficiency of heat exchange between waste gas and water is improved, thereby reducing fuel consumption. After the waste gas is cooled down, it enters the subsequent electrostatic precipitator body and activated carbon plate, which can reduce the damage to the equipment caused by high temperature and improve the service life of the waste gas treatment device.

[0012] At the same time, by setting up a waste gas treatment mechanism, compared with existing technologies, the risk of penetration caused by local saturation of a single activated carbon plate can be avoided by using it alternately, thus maintaining the compliance of the outlet gas and ensuring production continuity without the need to stop the machine to replace the activated carbon. Attached Figure Description

[0013] Figure 1 A schematic diagram of the overall structure of this utility model is shown;

[0014] Figure 2 A schematic diagram of the rear structure in this utility model is shown;

[0015] Figure 3 A partial schematic diagram of the connection between the heating cylinder and the heat-conducting plate in this utility model is shown;

[0016] Figure 4 A partial schematic diagram of the connection between the partition and the air duct in this utility model is shown;

[0017] Figure 5 A partial schematic diagram of the connection between the air intake pipe and the fixing rod in this utility model is shown;

[0018] Figure 6 A partial schematic diagram of the connection between the drawer box and the shelf in this utility model is shown;

[0019] Figure 7 A partial schematic diagram of the connection between the top cover and the tray in this utility model is shown;

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Outer shell; 2. Inlet pipe; 3. Top cover; 4. Outlet pipe; 5. Electrostatic precipitator body; 6. Partition plate; 7. Air guide pipe; 8. Positioning frame; 9. Water inlet pipe; 10. Diverter pipe; 11. Heating cylinder; 12. Heat conduction plate one; 13. Heat conduction plate two; 14. Combination pipe; 15. Water outlet pipe; 16. Fixing rod; 17. Dispersion plate; 18. Drawer; 19. Placement plate; 20. Gear; 21. Support plate; 22. Gear groove; 23. Activated carbon plate; 24. Protective shell; 25. Servo motor. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and preferred embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0023] In the description of the utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0024] Example 1: A waste gas treatment device for asphalt production includes an outer shell 1, an air inlet pipe 2 connected to the bottom of the outer shell 1, a top cover 3 fixedly connected to the top of the outer shell 1, an air outlet pipe 4 connected to the top of the top cover 3, an electrostatic precipitator body 5 slidably connected to the inner side of the outer shell 1, and a waste heat recovery mechanism provided inside the outer shell 1. The waste heat recovery mechanism includes a partition 6, the outer side of the partition 6 is fixedly connected to the inner side of the outer shell 1, multiple air guide pipes 7 are fixedly connected to the top of the partition 6, a positioning frame 8 is fixedly connected to the inner side of the outer shell 1, a water inlet pipe 9 is fixedly connected to one side of the outer shell 1, one end of the water inlet pipe 9 penetrates the inner wall of the outer shell 1 and extends to the outer side of the outer shell 1, and the other end of the water inlet pipe 9 is fixedly connected to multiple diversion pipes 10. One end of the diversion pipe 10 is fixedly connected to a heating cylinder 11, and a heat conduction plate 12 and a heat conduction device are fixedly connected to the outer side of the heating cylinder 11. Heat-conducting plates 12 and 13 are arranged sequentially from bottom to top on the outside of the heating cylinder 11. One end of the water inlet pipe 9 is connected to the water inlet pipe. A merging pipe 14 is fixedly connected to the top of the heating cylinder 11. One end of the merging pipe 14 is fixedly connected to the water outlet pipe 15. One end of the water outlet pipe 15 penetrates the inner wall of the outer shell 1 and extends to the outside of the outer shell 1. One end of the water outlet pipe 15 is connected to the input end of the waste heat boiler. A waste gas treatment mechanism is provided inside the outer shell 1. Cold water is transported to the heating cylinder 11, heat-conducting plates 12 and 13 through the water inlet pipe 9 and the merging pipe 10. Under the heat conduction of the heating cylinder 11, heat-conducting plates 12 and 13, the waste gas heats the cold water. The heated water is then centrally output through the merging pipe 14 and the water outlet pipe 15 and centrally stored through the waste heat boiler.

[0025] Example 2: The exhaust gas treatment mechanism includes a fixed rod 16, the outer side of which is fixedly connected to the inner side of the intake pipe 2. A dispersion disc 17 is fixedly connected to the top of the fixed rod 16. The dispersion disc 17 has a conical cross-section. Three drawers 18 are slidably connected to the bottom of the outer shell 1. A placement plate 19 is snapped into the bottom of each drawer 18. The surface of the placement plate 19 is covered with gravel. Multiple slots are opened on the outer side of the placement plate 19. A protective shell 24 is fixedly connected to the top of the top cover 3. A servo motor 25 is fixedly connected to the inner side of the protective shell 24. A gear 20 is fixedly connected to the output end of the servo motor 25. A support plate 21 is slidably connected to the inside of the top cover 3. Multiple toothed grooves 22 are opened on one side of the support plate 21. The inner side of the toothed grooves 22 meshes with one side of the gear 20. Two activated carbon plates 23 are snapped onto the top of the support plate 21. The protective shell 24 drives the servo motor 25 to mesh and drive the support plate 21 and the toothed grooves 22, so that the support plate 21 can drive the two activated carbon plates 23 to reciprocate and change positions, so that the used activated carbon plates 23 can be replaced without stopping the machine.

[0026] Working principle of this utility model: This utility model designs a waste gas treatment device for asphalt production, the specific structure of which is shown in the attached instruction manual. Figure 1-7As shown, in this technical solution, through the cooperation of various structures, when treating the exhaust gas from asphalt production, water is first transported through the inlet pipe 9 and multiple branch pipes 10 to the interior of the heating cylinder 11, the first heat-conducting plate 12, and the second heat-conducting plate 13. The exhaust gas is then transported into the interior of the outer shell 1 through the air inlet pipe 2. During this process, the exhaust gas is dispersed by the conical surface of the dispersion plate 17 upon entering the interior of the outer shell 1. Simultaneously, crushed stone blocks are placed inside the three drawers 18 and laid on top of the placement plate 19. The exhaust gas then passes through the three drawers 18, the placement plate 19, and the laid-out crushed stone blocks, filtering out larger impurities. After passing through the three drawers 18 and the placement plate 19, the exhaust gas is guided by the partition plate 6 and multiple air guide pipes 7, allowing it to gather at the bottom of multiple corresponding heating cylinders 11. Then, the exhaust gas flows upwards and heats the cylinders. 11. The surfaces of heat-conducting plate 12 and heat-conducting plate 23 make good contact, so that the heat mixed in the exhaust gas heats the water inside the heating cylinder 11, heat-conducting plate 12 and heat-conducting plate 23. Then, under the continuous heating of the exhaust gas, the water inside the heating cylinder 11, heat-conducting plate 12 and heat-conducting plate 23 is heated. After that, the heated water is transported to the waste heat boiler through multiple confluence pipes 14 and water outlet pipes 15 for storage and subsequent use. After that, the treated exhaust gas passes through multiple heating cylinders 11 upward and passes through the ionization zone inside the electrostatic precipitator body 5. The high voltage electric field therein ionizes the gas, and then the particulate matter becomes charged. Under the action of the electric field, the charged particulate matter moves towards the dust collection electrode. Then the particulate matter is captured by the dust collection electrode. After that, the treated exhaust gas undergoes secondary filtration through the activated carbon plate 23 on the top of the tray 21 inside the top cover 3. After that, the treated exhaust gas is discharged through the exhaust pipe 4.

[0027] After a period of use, the protective shell 24 will drive the servo motor 25 to engage the toothed groove 22 on one side of the support plate 21, so that the support plate 21 can drive the two activated carbon plates 23 to move back and forth at the air outlet of the top cover 3 and the air outlet pipe 4, so that the staff can clean and replace the activated carbon plates 23 after use, and the exhaust gas treatment device can be used continuously.

[0028] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A waste gas treatment device for asphalt production comprising a housing (1), characterized in that, The bottom of the shell (1) is communicated with an air inlet pipe (2), the top of the shell (1) is fixedly connected with a top cover (3), the top of the top cover (3) is communicated with an air outlet pipe (4), the inside of the shell (1) is slidably connected with an electrostatic precipitator body (5), and the inside of the shell (1) is provided with a waste heat recovery mechanism. The waste heat recovery mechanism comprises a partition plate (6), the outside of the partition plate (6) is fixedly connected with the inside of the shell (1), a plurality of air guide pipes (7) are fixedly connected to the top of the partition plate (6), a positioning frame (8) is fixedly connected to the inside of the shell (1), a water inlet pipe (9) is fixedly connected to one side of the shell (1), one end of the water inlet pipe (9) penetrates through the inner wall of the shell (1) and extends to the outside of the shell (1), and the other end of the water inlet pipe (9) is fixedly connected with a plurality of shunt pipes (10); and the inside of the shell (1) is provided with a waste gas treatment mechanism.

2. The exhaust gas treatment device for asphalt production according to claim 1, characterized in that, One end of the shunt pipe (10) is fixedly connected with a heating cylinder (11), the outside of the heating cylinder (11) is fixedly connected with a heat conduction disc one (12) and a heat conduction disc two (13), the heat conduction disc one (12) and the heat conduction disc two (13) are distributed on the outside of the heating cylinder (11) from bottom to top, and one end of the water inlet pipe (9) is connected with the water inlet pipe.

3. The exhaust gas treatment device for asphalt production according to claim 2, characterized in that, The top of the heating cylinder (11) is fixedly connected with a confluence pipe (14), one end of the confluence pipe (14) is fixedly connected with a water outlet pipe (15), one end of the water outlet pipe (15) penetrates through the inner wall of the shell (1) and extends to the outside of the shell (1), and one end of the water outlet pipe (15) is communicated with the input end of the waste heat boiler.

4. The exhaust gas treatment device for asphalt production according to claim 1, characterized in that, The waste gas treatment mechanism comprises a fixed rod (16), the outside of the fixed rod (16) is fixedly connected with the inside of the air inlet pipe (2), the top of the fixed rod (16) is fixedly connected with a dispersion disc (17), and the cross section of the dispersion disc (17) is in the shape of a cone.

5. The exhaust gas treatment device for asphalt production according to claim 4, characterized in that, The bottom of the shell (1) is slidably connected with three drawers (18), the bottom of the drawer (18) is clamped with a placing plate (19), the surface of the placing plate (19) is paved with gravel blocks, and a plurality of grooves are formed in the outside of the placing plate (19).

6. The exhaust gas treatment device for asphalt production according to claim 5, characterized in that, The top of the top cover (3) is fixedly connected with a protective shell (24), the inside of the protective shell (24) is fixedly connected with a servo motor (25), and the output end of the servo motor (25) is fixedly connected with a gear (20).

7. The exhaust gas treatment device for asphalt production according to claim 6, characterized in that, The inside of the top cover (3) is slidably connected with a supporting plate (21), a plurality of gear grooves (22) are formed in one side of the supporting plate (21), the inside of the gear groove (22) is meshed with one side of the gear (20), and the top of the supporting plate (21) is clamped with two activated carbon plates (23).

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