An asphalt exhaust gas treatment device

Abstract

The application relates to the technical field of waste gas treatment, and discloses a bitumen waste gas treatment device, which comprises a vertically arranged oil remover main body, a heater arranged on the outer wall of the oil remover main body and used for heating the oil remover main body, an air inlet arranged at the bottom of the oil remover main body and used for allowing waste gas to enter, an air outlet arranged at the top of the oil remover main body and used for discharging waste gas after oil removal, a flue gas cyclone device arranged in the oil remover main body and used for driving waste gas to rotate, the flue gas cyclone device comprises a plurality of guide vanes arranged in a circumferential interval around the central axis of the oil remover main body, the guide vanes are arranged in an inclined mode, adjacent two guide vanes form an air flow channel for waste gas to pass through, and the bottom of the oil remover main body is provided with an oil discharge port for discharging bitumen tar. The application can filter and collect bitumen flue gas in waste gas.

Description

Technical Field

[0001] This application relates to the technical field of waste gas treatment, and in particular to an asphalt waste gas treatment device. Background Technology

[0002] Currently, the production process of artificial graphite, a lithium-ion battery anode material, involves coating graphite anode material with asphalt, stirring and granulating it in a coating reactor, and then carbonizing it in a roller furnace. The production process of asphalt in lithium-ion battery anode materials requires thermal decomposition and thermal polymerization reactions ranging from room temperature to 2500℃. During the stirring in the coating reactor and the carbonization process in the roller furnace, a large amount of tar-containing, particulate asphalt fumes (toluene-soluble substances) and some organic waste gases from the production process are volatilized. These organic waste gases require purification treatment before being released into the atmosphere. The treatment of these organic waste gases requires the collection and filtration of tar and asphalt fumes before subsequent incineration.

[0003] Asphalt has a softening point of 80-120℃. In waste gas treatment, asphalt fumes are typically filtered using wire mesh and filter bags. However, asphalt fumes below their softening point easily adhere to the filter bags, affecting their filtration efficiency for other insoluble organic substances and causing bag clogging requiring frequent replacement. Furthermore, unfiltered asphalt fumes entering RTO (Regenerative Thermal Oxidizer) systems can cause asphalt to adhere to fan blades, heat storage media, and heat exchangers, leading to equipment malfunction. Therefore, a sustainable asphalt waste gas treatment device is needed to filter and collect asphalt fumes from waste gases. Summary of the Invention

[0004] This application provides an asphalt exhaust gas treatment device that can filter and collect asphalt fumes in the exhaust gas.

[0005] This application provides an asphalt waste gas treatment device, which adopts the following technical solution:

[0006] An asphalt exhaust gas treatment device includes a vertically arranged oil separator body. A heater for heating the oil separator body is provided on its outer wall. An air inlet for exhaust gas is provided at the bottom of the oil separator body, and an air outlet for exhaust gas to be discharged after oil removal is provided at the top of the oil separator body. A flue gas cyclone device for rotating the exhaust gas is provided inside the oil separator body. The flue gas cyclone device includes a plurality of guide vanes arranged circumferentially at intervals along the central axis of the oil separator body. The guide vanes are inclined, and an airflow channel for exhaust gas is formed between adjacent guide vanes. An oil outlet for discharging asphalt tar is provided at the bottom of the oil separator body.

[0007] By adopting the above technical solution, the exhaust gas containing asphalt will form a rotation and centrifugal motion after passing through the flue gas cyclone device. The upward swirling airflow will form small droplets of particulate asphalt flue gas and throw them toward the side wall of the oil separator body. The heater ensures the temperature of the oil separator body and inner wall, reduces the possibility of asphalt adhesion, keeps the asphalt softened, and the asphalt tar can flow down the inner wall of the oil separator body and be discharged through the oil outlet.

[0008] Optionally, the oil separator body is further provided with an oil removal and filtration device, which includes a conical exhaust pipe. The outer ring of the exhaust pipe abuts against the inner wall of the oil separator body. The opening of the exhaust pipe faces the air outlet, and the outlet of the exhaust pipe faces the oil discharge port. The side wall of the exhaust pipe is provided with perforations for the passage of flue gas.

[0009] By adopting the above technical solution, the asphalt tar on the inner wall of the oil separator body can fall down along the exhaust pipe. Since the air inlet is blowing upward from the bottom, although there are perforations, the asphalt tar will not flow out from the perforations under the action of the upward wind force, but will flow down with the exhaust pipe.

[0010] Optionally, a spiral air guide plate is provided on the outer wall of the exhaust pipe, and the air guide plate has the same air guiding direction as the air guide plate.

[0011] By adopting the above technical solution, the rotating and rising airflow can further enhance the rotation effect after passing through the air guide plate, maintain the centrifugal effect, and better throw the asphalt fumes toward the side wall of the oil separator body.

[0012] Optionally, the inner wall of the exhaust duct is provided with a plurality of guide plates for guiding asphalt tar at intervals. One end of the guide plate is connected to the top of the exhaust duct, and the other end is connected to the outlet of the exhaust duct.

[0013] By adopting the above technical solution, the asphalt tar will flow with the guide plate of the flue, which can guide the asphalt tar, and at the same time the guide plate can also increase the structural strength of the flue.

[0014] Optionally, the outlet of the flue is provided with an oil discharge pipe for conveying asphalt tar, the oil discharge pipe passing through the center of the flue gas cyclone device.

[0015] By adopting the above technical solution, the asphalt tar is fed into the oil discharge pipe along the guide plate on the flue pipe. The oil discharge pipe passes through the middle of the flue gas cyclone device, which will not affect the normal use of the flue gas cyclone device.

[0016] Optionally, multiple oil removal and filtration devices are provided, and the bottom of each oil removal and filtration device is located on top of another oil removal and filtration device.

[0017] By adopting the above technical solution, as the airflow rises, the rotation effect of the airflow will gradually decrease. By setting multiple oil removal and filtration devices, a strong rotation effect can be maintained continuously.

[0018] Optionally, a steam inlet is also provided at the top of the oil separator body.

[0019] By adopting the above technical solution, steam is introduced from the steam inlet, which can further soften the asphalt on the inner wall of the oil separator body, and at the same time better carry the asphalt downwards.

[0020] Optionally, the bottom of the oil separator body is provided with an oil collector for collecting asphalt tar.

[0021] By adopting the above technical solution, the oil collector can collect asphalt tar, which facilitates subsequent processing.

[0022] In summary, this application includes at least one of the following beneficial effects:

[0023] The exhaust gas containing asphalt and tar enters the main body of the oil separator. As it moves upward, it generates rotation and centrifugal motion, which throws the asphalt and tar off the inner wall of the main body of the oil separator in stages. The tar then flows downward along the inner wall of the main body of the oil separator and collects, thus achieving the removal of oil from the flue gas. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0025] Figure 2 This is a cross-sectional view of an embodiment of this application;

[0026] Figure 3 This is a schematic diagram of the structure of the oil removal filter and the flue gas cyclone device in the embodiments of this application.

[0027] Explanation of reference numerals in the attached drawings: 1. Oil separator body; 11. Insulation layer; 12. Heater; 13. Oil drain port; 14. Steam inlet; 15. Air inlet; 16. Air outlet; 2. Exhaust pipe; 21. Oil drain pipe; 22. Guide plate; 23. Air guide plate; 3. Flue gas cyclone device; 31. Guide vane; 4. Oil collector. Detailed Implementation

[0028] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0029] Reference Figure 1 and Figure 2This application discloses an asphalt exhaust gas treatment device, including a vertically arranged, cylindrical oil separator body 1. An air inlet 15 for exhaust gas to enter is located at the bottom of the side wall of the oil separator body 1, and an air outlet 16 for exhaust gas to exit after oil removal is located at the top of the oil separator body 1. The oil separator body 1 is provided with a heat insulation layer 11, and a heater 12 is embedded within the heat insulation layer 11. The heater 12 is used to heat the inner wall and inner cavity of the oil separator body 1 and maintain the temperature between 80-120℃ to prevent asphalt tar from adhering inside the oil separator body 1.

[0030] Reference Figure 2 and Figure 3 The oil separator body 1 is equipped with a flue gas cyclone device 3 that drives the exhaust gas to rotate. The flue gas cyclone device 3 includes several guide vanes 31 arranged circumferentially around the central axis of the oil separator body 1. The guide vanes 31 are inclined, and an airflow channel is formed between adjacent guide vanes 31 for the exhaust gas to pass through. The exhaust gas entering from the inlet 15 will rotate and centrifuge after passing through the airflow channel. The upward rotating airflow will throw the particulate asphalt fumes into small droplets and throw them towards the side wall of the oil separator body 1 to form asphalt tar. The asphalt tar can flow downward with the inner wall of the oil separator body 1 and be discharged through the oil outlet 13. The bottom of the oil outlet 13 is also connected to an oil collector 4 for collecting asphalt tar.

[0031] Reference Figure 3 Furthermore, an oil removal and filtration device is installed inside the oil separator body 1, above the flue gas cyclone device 3. The oil removal and filtration device includes a conical exhaust pipe 2 fixed by a bracket. The outer ring of the exhaust pipe 2 abuts against the inner wall of the oil separator body 1. Perforations for flue gas passage are provided on the side wall of the exhaust pipe 2. The opening of the exhaust pipe 2 faces the outlet 16. An oil drain pipe 21 for conveying asphalt tar is provided at the outlet of the exhaust pipe 2, extending through the center of the flue gas cyclone device 3. The asphalt tar on the inner wall of the oil separator body 1 can fall down along the exhaust pipe 2. Because the air inlet 15 blows air upwards from below, although perforations are provided, the asphalt tar will not flow out from the perforations due to the upward airflow. Instead, it will collect with the exhaust pipe 2 and flow downwards through the oil drain pipe 21.

[0032] To further improve the oil drainage effect of the exhaust pipe 2, several guide plates 22 for guiding asphalt tar are provided at intervals on the inner wall of the exhaust pipe 2. One end of the guide plate 22 is connected to the top of the exhaust pipe 2, and the other end is connected to the outlet of the exhaust pipe 2. The asphalt tar can flow with the guide plate 22 of the exhaust pipe 2, so as to better enter the oil drain pipe 21.

[0033] As the upward rotating flow of flue gas gradually reduces the rotation effect, a spiral air guide plate 23 is provided on the outer wall of the exhaust pipe 2 to reduce this drawback. The air guide plate 23 has the same air guide direction as the guide plate 31. The upward rotating airflow can pass through the air guide plate 23 to further enhance the rotation and centrifugal effect.

[0034] Furthermore, multiple oil removal and filtration devices are arranged along the direction of exhaust gas flow, i.e., multiple exhaust hoppers 2 are arranged, and the bottom of each exhaust hopper 2 is located at the top of another exhaust hopper 2, and the inclination of the guide plate 23 of the upper exhaust hopper 2 is greater than that of the guide plate 23 of the lower exhaust hopper 2. As the airflow rises sequentially through each exhaust hopper 2, its rotation speed will continuously increase, allowing the asphalt tar to be centrifugally ejected stage by stage.

[0035] Finally, a steam inlet 14 is also provided at the top of the oil separator body 1. The steam inlet 14 is directly opposite the inner wall of the oil separator body 1 and is eccentrically positioned on the oil separator body 1. As the steam enters the oil separator body 1, it will rotate, and the direction of rotation is opposite to the upward rotation direction of the flue gas. In this way, the steam and flue gas will collide, and the water droplets in the steam will further coat the asphalt droplets in the flue gas, making the asphalt droplets heavier and falling. Moreover, the steam can further improve the fluidity of the asphalt on the inner wall of the oil separator body 1, and better remove the asphalt tar on the inner wall of the oil separator body 1.

[0036] The implementation principle of the asphalt exhaust gas treatment device in this application embodiment is as follows:

[0037] The exhaust gas containing asphalt and tar enters the oil separator body 1. As it moves upward, it generates rotation and centrifugal motion, which throws the asphalt and tar off the inner wall of the oil separator body 1 in stages. The tar then flows downward along the inner wall of the oil separator body 1 and collects, thus achieving the removal of oil from the flue gas.

[0038] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An asphalt offgas treatment apparatus, characterized by: The oil remover body (1) is vertically arranged, a heater (12) for heating the oil remover body (1) is arranged on the outer wall of the oil remover body (1), an air inlet (15) for the exhaust gas to enter is arranged at the bottom of the oil remover body (1), an air outlet (16) for the exhaust gas after oil removal to discharge is arranged at the top of the oil remover body (1), a flue gas cyclone device (3) for driving the exhaust gas to rotate is arranged in the oil remover body (1), the flue gas cyclone device (3) comprises a plurality of guide vanes (31) arranged in the circumferential direction of the central axis of the oil remover body (1), the guide vanes (31) are arranged obliquely, and the air flow channels for the exhaust gas to pass through are formed between the adjacent two guide vanes (31), and an oil discharge port (13) for discharging the asphalt tar is arranged at the bottom of the oil remover body (1); The oil remover body (1) is further provided with an oil removal filter device, the oil removal filter device comprises a smoke discharge funnel (2) arranged in a conical shape, the outer ring of the smoke discharge funnel (2) is in abutment with the inner wall of the oil remover body (1), the opening of the smoke discharge funnel (2) faces the air outlet (16), the outlet of the smoke discharge funnel (2) faces the oil discharge port (13), and the side wall of the smoke discharge funnel (2) is provided with perforations for the flue gas to pass through; The outer wall of the smoke discharge funnel (2) is provided with a spiral air deflector (23), and the flow direction of the air deflector (23) is consistent with the flow direction of the guide vane (31).

2. The asphalt exhaust gas treatment device of claim 1, wherein: A plurality of drainage guide plates (22) for guiding the asphalt tar are arranged at intervals on the inner wall of the smoke discharge funnel (2), one end of the drainage guide plate (22) is connected to the top of the smoke discharge funnel (2), and the other end is connected to the outlet of the smoke discharge funnel (2).

3. The asphalt exhaust treatment device of claim 1, wherein: An oil discharge pipe (21) for discharging the asphalt tar is arranged at the outlet of the smoke discharge funnel (2), and the oil discharge pipe (21) penetrates the center of the flue gas cyclone device (3).

4. The asphalt exhaust treatment device of claim 1, wherein: A plurality of oil removal filter devices are arranged, and the bottom of each oil removal filter device is located at the top of another oil removal filter device.

5. The asphalt exhaust treatment device of claim 1, wherein: The top of the oil remover body (1) is further provided with a steam inlet (14).

6. The asphalt exhaust treatment device of claim 1, wherein: The bottom of the oil remover body (1) is provided with an oil collector (4) for collecting the asphalt tar.

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