An environmentally friendly asphalt production exhaust gas treatment equipment

Abstract

This utility model discloses an environmentally friendly asphalt production tail gas treatment device, relating to the field of asphalt production tail gas treatment technology. It includes an inlet pipe rotatably installed at the lower end of a cleaning tower. A spiral exhaust pipe is installed outside the inlet pipe and is fixedly connected to the inlet pipe. A fine exhaust net is installed outside the spiral exhaust pipe. This device, with its spiral exhaust pipe, allows the asphalt tail gas to spirally exit the device, enabling it to pass evenly through the fine exhaust net into the alkaline cleaning liquid inside the cleaning tower. This ensures sufficient contact between the asphalt tail gas and the alkaline cleaning liquid, increasing the contact area and improving the device's treatment efficiency. The installation of a bubble-breaking shaft allows for the rapid breaking and mixing of asphalt tail gas bubbles in the alkaline cleaning liquid, ensuring that the bubbles are evenly distributed within the liquid and guaranteeing sufficient contact between the asphalt tail gas and the alkaline cleaning liquid.

Description

Technical Field

[0001] This utility model relates to the field of asphalt production exhaust gas treatment technology, specifically an environmentally friendly asphalt production exhaust gas treatment device. Background Technology

[0002] During the asphalt production process, the asphalt raw materials need to be heated, which generates a large amount of waste flue gas containing a variety of organic compounds, including carbocyclic hydrocarbons, cyclic hydrocarbon derivatives and other compounds. Many of these components are harmful to human health, and if they are directly discharged into the atmosphere, they will cause serious air pollution.

[0003] The existing tail gas treatment equipment for asphalt production lines mainly adopts tail gas treatment alkaline scrubbing towers, which use alkaline solution absorption combined with activated carbon filtration to treat tail gas. Although the existing tail gas treatment equipment for asphalt production lines has a certain absorption and treatment effect on tail gas, the alkaline solution and asphalt are not mixed sufficiently, resulting in unsatisfactory absorption effect and difficulty in guaranteeing the quality of tail gas treatment.

[0004] For example, the Chinese authorized patent with announcement number CN 211537214 U (A kind of asphalt production line tail gas treatment equipment): In actual use, the asphalt tail gas first enters the bottom of the cleaning tower vertically downward through the elbow and then rises, which can significantly reduce the flow rate of the asphalt tail gas and make the asphalt tail gas diffuse, increasing the reaction time and reaction area between the subsequent alkali solution and the asphalt tail gas, so that the mixing is more complete and the absorption is more thorough. Then, when the asphalt tail gas rises and passes through the Raschig ring packing layer, the flow rate is further slowed down. The alkali solution sprayed from the nozzle adheres to the Raschig ring packing layer to form a liquid film, increasing the reaction area between the alkali solution and the asphalt tail gas, which can better absorb the acidic gases in the asphalt tail gas. When the asphalt tail gas continues to rise and passes through the nozzle, it will have a secondary reaction with the alkali solution sprayed from the nozzle, improving the absorption effect of the tail gas. Then, the asphalt tail gas first passes through the demister to remove the liquid, and then passes through the activated carbon layer to further adsorb and purify the impurities. Finally, the treated asphalt tail gas is discharged through the exhaust pipe, which can make the alkali solution and the asphalt tail gas fully mixed, improving the treatment effect of the asphalt tail gas. This technical solution solves the above problems.

[0005] However, the technical solution of this utility model still has some technical problems. When the asphalt production line tail gas treatment equipment is in use, the asphalt tail gas is directly introduced into the lower end of the cleaning tower. The asphalt tail gas forms bubbles in the alkaline cleaning liquid and floats upward quickly. As a result, the alkaline cleaning liquid cannot fully contact the asphalt tail gas in the center of the bubbles in time, which affects the cleaning efficiency of the asphalt tail gas.

[0006] Therefore, an environmentally friendly asphalt production exhaust gas treatment device is proposed. Utility Model Content

[0007] The purpose of this utility model is to provide an environmentally friendly asphalt production tail gas treatment device to solve the problem mentioned in the background art that when the asphalt production line tail gas treatment device is used, the asphalt tail gas is directly introduced into the lower end of the cleaning tower, and the asphalt tail gas forms bubbles in the alkaline cleaning liquid and floats upward quickly, which leads to the alkaline cleaning liquid not being able to fully contact the asphalt tail gas in the center of the bubbles in time, thus affecting the cleaning efficiency of the asphalt tail gas.

[0008] To achieve the above objectives, this utility model provides the following technical solution: an environmentally friendly asphalt production tail gas treatment device, comprising a cleaning tower:

[0009] An air intake pipe is rotatably installed at the lower end of the cleaning tower. A spiral exhaust pipe is installed on the outside of the air intake pipe. The spiral exhaust pipe is fixedly connected to the air intake pipe. A fine air outlet mesh is installed on the outside of the spiral exhaust pipe. The fine air outlet mesh is welded to the spiral exhaust pipe. A rotating support is installed at the upper end of the air intake pipe.

[0010] The upper sealing plate is fixedly installed at the upper end of the cleaning tower. The upper sealing plate is rotatably connected to the rotating support through bearings. The outer annular array of the air inlet pipe has bubble breaking shafts, which are fixedly connected to the air inlet pipe. Several bubble breaking shafts are provided.

[0011] Preferably, the lower annular array outside the cleaning tower has six supporting legs, and all six supporting legs are welded to the cleaning tower.

[0012] Preferably, a drive motor is fixedly installed at the upper end of the upper sealing plate, and the drive motor is connected to the rotating bracket through a coupling.

[0013] Preferably, an exhaust pipe is installed on one side of the upper end of the upper sealing plate, and the exhaust pipe is welded to the upper sealing plate.

[0014] Preferably, an alkaline cleaning solution spray pipe is installed on one side of the cleaning tower, and the alkaline cleaning solution spray pipe is welded to the cleaning tower.

[0015] Preferably, an activated carbon layer is installed on the upper part of the outer side of the rotating support, a demister is installed below the activated carbon layer, a Raschig ring packing layer is installed below the alkaline cleaning liquid spray pipe, the demister, the Raschig ring packing layer and the activated carbon layer are all connected to the cleaning tower by snap-fit, and the demister, the Raschig ring packing layer and the activated carbon layer are all rotatably connected to the rotating support.

[0016] Preferably, a safety valve is installed at the lower end of the intake pipe, a one-way valve is installed at the upper end of the spiral exhaust pipe, and the rotating bracket is fixedly connected to the intake pipe.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. This utility model allows asphalt exhaust gas to be spirally discharged inside the device by installing a spiral exhaust pipe, which in turn allows the asphalt exhaust gas to be evenly discharged into the alkaline cleaning liquid inside the cleaning tower through a fine exhaust net, thereby allowing the asphalt exhaust gas to fully contact the alkaline cleaning liquid, increasing the contact area between the alkaline cleaning liquid and the asphalt exhaust gas, and improving the device's treatment efficiency for asphalt exhaust gas.

[0019] 2. This utility model can quickly break and mix the asphalt exhaust gas bubbles in the alkaline cleaning solution by installing a bubble breaking shaft, so that the asphalt exhaust gas bubbles are evenly distributed in the alkaline cleaning solution, ensuring that the asphalt exhaust gas and the alkaline cleaning solution are in full contact. Attached Figure Description

[0020] Figure 1 This is a three-dimensional perspective view of an environmentally friendly asphalt production exhaust gas treatment device according to this utility model.

[0021] Figure 2 This is a schematic diagram of the internal structure of an environmentally friendly asphalt production tail gas treatment device according to this utility model.

[0022] Figure 3 This is a diagram showing the connection relationship between the spiral exhaust pipe and the fine air outlet mesh of this utility model;

[0023] Figure 4 This diagram shows the connection relationship between the spiral exhaust pipe and the intake pipe of this utility model.

[0024] In the diagram: 1. Cleaning tower; 2. Alkaline cleaning solution spray pipe; 3. Exhaust pipe; 4. Drive motor; 5. Top sealing plate; 6. Support leg; 7. Air inlet pipe; 8. Activated carbon layer; 9. Demister; 10. Raschig ring packing layer; 11. Rotary support; 12. Spiral exhaust pipe; 13. Fine air outlet mesh; 14. Bubble breaking shaft; 15. Check valve; 16. Safety valve. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] Please see Figure 1-4 One embodiment of this utility model is an environmentally friendly asphalt production tail gas treatment device, comprising a cleaning tower 1.

[0027] The air inlet pipe 7 is rotatably installed at the lower end of the cleaning tower 1. A spiral exhaust pipe 12 is installed on the outside of the air inlet pipe 7. The installation of the spiral exhaust pipe 12 can make the asphalt tail gas spirally discharged inside the device, and then the asphalt tail gas can be evenly discharged into the alkaline cleaning liquid inside the cleaning tower 1 through the fine exhaust net 13, so that the asphalt tail gas and the alkaline cleaning liquid can be fully contacted, increasing the contact area between the alkaline cleaning liquid and the asphalt tail gas, and improving the treatment efficiency of the device for asphalt tail gas. The spiral exhaust pipe 12 is fixedly connected to the air inlet pipe 7. A fine exhaust net 13 is installed on the outside of the spiral exhaust pipe 12 and welded to the spiral exhaust pipe 12. A rotating support 11 is installed at the upper end of the air inlet pipe 7.

[0028] The upper sealing plate 5 is fixedly installed at the upper end of the cleaning tower 1. The upper sealing plate 5 is rotatably connected to the rotating support 11 through bearings. The outer annular array of the air inlet pipe 7 has bubble breaking shafts 14. Installing the bubble breaking shafts 14 can quickly break and mix the asphalt tail gas bubbles in the alkaline cleaning liquid, so that the asphalt tail gas bubbles are evenly distributed in the alkaline cleaning liquid, ensuring that the asphalt tail gas and the alkaline cleaning liquid are in full contact. The bubble breaking shafts 14 are fixedly connected to the air inlet pipe 7, and several bubble breaking shafts 14 are provided.

[0029] Please see Figure 1 , Figure 2 , Figure 3 and Figure 4 The lower end of the cleaning tower 1 has six supporting legs 6 arranged in a ring. All six supporting legs 6 are welded to the cleaning tower 1. A drive motor 4 is fixedly installed on the upper end of the upper sealing plate 5. The drive motor 4 is connected to the rotating bracket 11 via a coupling. An exhaust pipe 3 is installed on one side of the upper end of the upper sealing plate 5 and is welded to the upper sealing plate 5. An alkaline cleaning liquid spray pipe 2 is installed on one side of the cleaning tower 1. Installing the alkaline cleaning liquid spray pipe 2 facilitates the spraying of alkaline cleaning liquid into the device, allowing the asphalt exhaust gas to be fully reacted by the alkaline cleaning liquid, ensuring the integrity of the device's functionality. The spray pipe 2 is welded to the cleaning tower 1. An activated carbon layer 8 is installed on the upper part of the outside of the rotating support 11. A demister 9 is installed below the activated carbon layer 8. A Raschig ring packing layer 10 is installed below the alkaline cleaning liquid spray pipe 2. The demister 9, the Raschig ring packing layer 10 and the activated carbon layer 8 are all connected to the cleaning tower 1 by snap-fit. The demister 9, the Raschig ring packing layer 10 and the activated carbon layer 8 are all rotatably connected to the rotating support 11. A safety valve 16 is installed at the lower end of the air inlet pipe 7. A one-way valve 15 is installed at the upper end of the spiral exhaust pipe 12. The rotating support 11 is fixedly connected to the air inlet pipe 7.

[0030] Working Principle: During operation, the operator connects the air inlet pipe 7 to the external pipe of the device via a pipe rotary joint. Then, the alkaline cleaning solution is sprayed into the device through the alkaline cleaning solution spray pipe 2. Next, the asphalt exhaust gas enters the device through the air inlet pipe 7 and is discharged into the alkaline cleaning solution through the fine exhaust net 13 outside the spiral exhaust pipe 12. At this time, the drive motor 4 drives the rotating support 11 to rotate, which in turn drives the air inlet pipe 7 and the spiral exhaust pipe 12 to rotate, thus ensuring that the asphalt exhaust gas is evenly discharged into the alkaline cleaning solution. Simultaneously, the bubble breaking shaft 14 breaks and mixes the bubbles in the alkaline cleaning solution, refining the asphalt bubbles and causing them to rise more slowly in the alkaline cleaning solution. This increases the contact time and contact area between the alkaline cleaning solution and the asphalt exhaust gas bubbles, improving the device's processing efficiency for the asphalt exhaust gas bubbles. The asphalt exhaust gas then enters the Raschig ring packing. In the material layer 10, the alkaline cleaning liquid is sprayed onto the upper end of the Raschig ring packing layer 10, forming a liquid film inside the Raschig ring packing layer 10. When the asphalt tail gas passes through the Raschig ring packing layer 10, the alkaline cleaning liquid further treats the asphalt tail gas. Then, the activated carbon layer 8 further treats the impurities in the asphalt tail gas. Finally, the air is discharged. The device is equipped with a spiral exhaust pipe 12, which allows the asphalt tail gas to be spirally discharged inside the device. This allows the asphalt tail gas to be evenly discharged into the alkaline cleaning liquid inside the cleaning tower 1 through the fine exhaust net 13, thereby ensuring that the asphalt tail gas and the alkaline cleaning liquid are in full contact, increasing the contact area between the alkaline cleaning liquid and the asphalt tail gas, and improving the device's treatment efficiency for the asphalt tail gas. The bubble breaking shaft 14 is installed to quickly break and mix the asphalt tail gas bubbles in the alkaline cleaning liquid, so that the asphalt tail gas bubbles are evenly distributed in the alkaline cleaning liquid, ensuring that the asphalt tail gas and the alkaline cleaning liquid are in full contact.

[0031] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An environmentally friendly asphalt production tail gas treatment device, comprising a scrubbing tower (1), characterized in that: An air intake pipe (7) is rotatably installed at the lower end of the cleaning tower (1). A spiral exhaust pipe (12) is installed on the outside of the air intake pipe (7). The spiral exhaust pipe (12) is fixedly connected to the air intake pipe (7). A fine air outlet mesh (13) is installed on the outside of the spiral exhaust pipe (12). The fine air outlet mesh (13) is welded to the spiral exhaust pipe (12). A rotating bracket (11) is installed at the upper end of the air intake pipe (7). The upper sealing plate (5) is fixedly installed at the upper end of the cleaning tower (1). The upper sealing plate (5) is rotatably connected to the rotating bracket (11) through a bearing. The outer annular array of the air inlet pipe (7) has bubble breaking shafts (14). The bubble breaking shafts (14) are fixedly connected to the air inlet pipe (7). Several bubble breaking shafts (14) are provided.

2. The environmentally friendly asphalt production tail gas treatment equipment according to claim 1, characterized in that: The lower end of the cleaning tower (1) has a ring array of six support legs (6), and the six support legs (6) are welded to the cleaning tower (1).

3. The environmentally friendly asphalt production tail gas treatment equipment according to claim 1, characterized in that: The upper end of the upper sealing plate (5) is fixedly installed with a drive motor (4), and the drive motor (4) is connected to the rotating bracket (11) through a coupling.

4. The environmentally friendly asphalt production tail gas treatment equipment according to claim 1, characterized in that: An exhaust pipe (3) is installed on one side of the upper end of the upper sealing plate (5), and the exhaust pipe (3) is welded to the upper sealing plate (5).

5. The environmentally friendly asphalt production tail gas treatment equipment according to claim 1, characterized in that: An alkaline cleaning liquid spray pipe (2) is installed on one side of the cleaning tower (1), and the alkaline cleaning liquid spray pipe (2) is welded to the cleaning tower (1).

6. The environmentally friendly asphalt production tail gas treatment equipment according to claim 5, characterized in that: An activated carbon layer (8) is installed on the upper part of the outside of the rotating support (11). A demister (9) is installed below the activated carbon layer (8). A Raschig ring packing layer (10) is installed below the alkaline cleaning liquid spray pipe (2). The demister (9), the Raschig ring packing layer (10) and the activated carbon layer (8) are all connected to the cleaning tower (1) by snap-fit. The demister (9), the Raschig ring packing layer (10) and the activated carbon layer (8) are all rotatably connected to the rotating support (11).

7. The environmentally friendly asphalt production tail gas treatment equipment according to claim 1, characterized in that: A safety valve (16) is installed at the lower end of the air intake pipe (7), a one-way valve (15) is installed at the upper end of the spiral exhaust pipe (12), and the rotating bracket (11) is fixedly connected to the air intake pipe (7).

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