Tail gas thermal oxidation treatment device and use method thereof

Abstract

The invention provides a tail gas thermal oxidation treatment device and a use method thereof. The tail gas thermal oxidation treatment device comprises a mounting seat, a heating element, a thermal insulation lining, a middle shell, an outer shell, a guide nozzle, a flow guide sleeve, a gas outlet pipe, a gas inflow adjusting device and a control system. The middle shell is arranged in the outer shell, the lower end of the air outlet pipe is communicated with the air inflow adjusting device, and the outer shell, the middle shell and the flow guide sleeve form an outer flow channel. The lower end of the shell is installed on the installation base, the heat insulation lining is arranged in the middle shell, and the guide nozzle is arranged at the joint of the flow guide sleeve and the middle shell. The heating element is arranged in the middle shell, the lower end of the heating element is connected with the mounting seat, the upper end of the heating element is communicated with the guide nozzle, and the heating element is electrically connected with the control system through a heating element power supply line; and temperature sensors are arranged on the flow guide sleeve and the mounting seat and are in electric signal connection with the control system. The device is small in size, suitable for while-drilling equipment, high in temperature control precision, safe to use, low in energy consumption and convenient to overhaul and maintain.

Description

Technical Field

[0001] The present invention belongs to the field of oil and gas field drilling operation equipment, and particularly relates to a tail gas thermal oxidation treatment device and a use method thereof. Background Art

[0002] With the large-scale development of national shale gas, the superiority of oil-based drilling fluid, which plays an irreplaceable role, is prominent. A large amount of oil-bearing cuttings, which belong to hazardous solid waste, will be generated during the drilling process, bringing great pressure to environmental protection and also affecting the sustainable development of enterprises. Therefore, finding a new technology for economically and effectively treating oil-based cuttings and recycling oil resources is of great significance for environmental protection, resource conservation and the sustainable development of enterprises.

[0003] The tail gas treatment device for grease thermal oxidation with the publication number of CN206853443U includes a feed inlet, an air inlet, an absorption tank, a discharge port, tail gas collection liquid, a partition plate and an exhaust port; the absorption tank is provided with the tail gas collection liquid, the air inlet is arranged at the bottom side of the absorption tank, and the exhaust port is located at the upper position of the absorption tank on the opposite side of the air inlet; a plurality of partition plates are arranged inside the absorption tank and partition the internal space of the absorption tank into a return-type tail gas absorption countercurrent contact reaction channel from bottom to top; the feed inlet is located on the upper end face of the absorption tank, and the discharge port is located at the lower end of the absorption tank. By installing this tail gas treatment device at the tail gas discharge port and absorbing and treating the tail gas, the emission of harmful gases can be reduced, achieving the purpose of environmental protection.

[0004] Currently, the following two methods are mainly adopted on site: One method is to use a cuttings box to collect and transport the oil-bearing cuttings to a centralized treatment site for treatment, with relatively high operation risks; the other method is to use a centrifuge to dehydrate on the well site and then store, collect and transport to a centralized treatment site for treatment. Although the transportation risk is reduced, the storage risk is increased. For this reason, an oil-based cuttings treatment device while drilling is developed. However, during the on-site operation of the treatment device while drilling, there are a small amount of CO, CH4, etc. in the tail gas. To reduce the emission pollution of the treatment device while drilling, the tail gas needs to be oxidized, but the existing tail gas treatment equipment has problems such as large treatment capacity, high energy consumption, non-explosion-proof, large volume, etc. Summary of the Invention

[0005] In order to overcome the problems of large existing storage and operation risks, the present invention provides a tail gas thermal oxidation treatment device and a use method thereof. The present invention is small in volume and suitable for equipment while drilling, has high temperature control accuracy, is safe to use, has low energy consumption and is convenient for overhaul and maintenance.

[0006] The technical solution adopted by the present invention is as follows: An exhaust gas thermal oxidation treatment device includes a mounting base, a heating element, a heat insulation lining, an intermediate shell, an outer shell, a guiding nozzle, a flow guiding sleeve, an air outlet pipe, an air intake amount adjusting device, and a control system; the intermediate shell is arranged inside the outer shell, the lower end of the air outlet pipe is communicated with the air intake amount adjusting device, and the lower end inlet direction of the air intake amount adjusting device is tangent to the lower end shell of the outer shell; the outer shell, the intermediate shell, and the flow guiding sleeve form an outer flow channel; the lower end of the outer shell is mounted on the mounting base, the heat insulation lining is arranged inside the intermediate shell, and the guiding nozzle is arranged at the connection between the flow guiding sleeve and the intermediate shell; the mounting base, the heat insulation lining, and the guiding nozzle form an inner flow channel; the heating element is arranged inside the intermediate shell, the lower end of the heating element is connected to the mounting base, the upper end of the heating element is communicated with the guiding nozzle, and the heating element is electrically connected to the control system through a heating element power supply wire; temperature sensors are arranged on both the flow guiding sleeve and the mounting base, and the temperature sensors are electrically connected to the control system by electrical signals; the air intake amount adjusting device is arranged at the lower part of the outer side wall of the outer shell.

[0007] The mounting base includes a bottom plate, an explosion-proof junction box, legs, a heating element fixing cylinder, and a heat insulation lining support. The explosion-proof junction box is arranged on the lower surface of the bottom plate, and the heating element fixing cylinder is arranged at the center of the upper surface of the bottom plate; the legs are arranged around the lower surface of the bottom plate; the heat insulation lining support supports the heat insulation lining inside the intermediate shell; the heating element fixing cylinder is connected to the heating element located inside the intermediate shell. The heating element adopts a double helix silicon carbide rod or a double helix silicon molybdenum rod.

[0008] The intermediate shell includes an intermediate shell flange, an intermediate shell body, and an intermediate shell top plate. The intermediate shell body is a hollow cylinder, and the intermediate shell top plate is arranged at the upper end of the intermediate shell body. The lower end of the intermediate shell body is connected to the outer shell flange through the intermediate shell flange.

[0009] Both the upper and lower ends of the outer shell are connected to the flow guiding sleeve and the mounting base through flanges.

[0010] The flow guiding sleeve includes a flow guiding sleeve lower flange, a flow guiding sleeve inner shell, a flow guiding sleeve outer shell, and a flow guiding sleeve upper flange. The flow guiding sleeve upper flange and the flow guiding sleeve lower flange are respectively arranged at the upper and lower ends of the flow guiding sleeve outer shell. The flow guiding sleeve inner shell is arranged inside the flow guiding sleeve outer shell. The flow guiding sleeve inner shell includes a vertical section, an upper opening section, and a lower opening section. The upper opening section at the upper end of the vertical section is funnel-shaped, and the lower opening section at the lower end of the vertical section is an inverted funnel-shaped; the maximum inner diameter of the upper opening section is greater than the maximum inner diameter of the lower opening section.

[0011] The air intake amount adjusting device includes an air inlet pipe and an air intake adjusting cylinder. The air intake amount adjusting device is arranged at the lower part of the outer shell. One end of the air inlet pipe is located outside the outer shell, and the other end penetrates the outer shell and is communicated with the space between the outer shell and the intermediate shell. The air intake adjusting cylinder is arranged at the end of the air inlet pipe.

[0012] The temperature sensor includes a high temperature sensor and a low temperature sensor. The high temperature sensor is installed on the inner shell of the guide sleeve in the guide sleeve; the low temperature sensor is installed on the bottom plate of the mounting seat in the guide sleeve. Both the high temperature sensor and the low temperature sensor are connected to the control system electrical signal.

[0013] A fireproof net is installed above the guide sleeve.

[0014] A method for using a tail gas thermal oxidation treatment device comprises the following steps: when the tail gas thermal oxidation treatment device is used, the port A on the bottom plate of the mounting seat is connected to the tail gas pipeline to be treated; the air intake regulating device is closed, the control system is turned on, and when the temperature reaches the set working temperature, the air intake regulating device is turned on; the tail gas to be treated enters from the port A, passes through the space between the guide nozzle and the guide sleeve of the heating element, and undergoes a first oxidation reaction with the air entering from the port B, and the gas that has not fully reacted undergoes an oxidation reaction again when passing through the heat insulation net, and is finally discharged from the port C.

[0015] Beneficial effects of the present invention: 1) Small size, suitable for drilling equipment The outer shell and the intermediate shell provided by the present invention adopt a concentric cylindrical structure, which is compact and small in size, and is suitable for use in places where installation space is limited.

[0016] 2) High temperature control accuracy and safe use The present invention controls the temperature sensor through the control system, the high temperature sensor ensures the process temperature, and the low temperature sensor monitors the internal temperature to ensure the normal working temperature of the electrical components.

[0017] During preheating before work, the air intake adjustment device is in the closed state. During work, the heating element and the fireproof net are always kept in a red hot state to ensure that the exhaust gas and the air do not explode.

[0018] In the present invention, the heat insulation lining is arranged in the multi-layer structure composed of the outer shell and the intermediate shell, and the heat reduction is limited to the intermediate shell to avoid burns to personnel.

[0019] 3) Low energy consumption The device provided by the present invention adopts a multi-layer structure, especially the air passes through the outer flow channel along the tangential direction, making full use of the heat. The air intake adjustment device can try to avoid a large amount of air entering and taking away the heat, and the heating element only needs to maintain the temperature, with low energy consumption.

[0020] 4) Easy maintenance The present invention adopts flange connection, which makes it easy to replace the heating element. Brief Description of the Figures

[0021] The present invention will be further described in detail below with reference to the accompanying drawings.

[0022] Figure 1 This is a schematic structural diagram of the device of the present invention.

[0023] In the figure, the reference numerals are as follows: 1. Mounting base; 2. Heating element; 3. Heat insulation liner; 4. Intermediate shell; 5. Outer shell; 6. Guide nozzle; 7. Flow guide sleeve; 8. Fire separation net; 9. Exhaust pipe; 10. High temperature sensor; 11. Intake air volume regulating device; 12. Low temperature detection head; 13. Heating element power supply wire; 14. Power supply wire; 15. Control system; 16. Instrument wire; 1-1. Bottom plate; 1-2. Explosion-proof junction box; 1-3. Leg; 1-4. Heating element fixing cylinder; 1-5. Heat insulation liner support; 4-1. Intermediate shell flange; 4-2. Intermediate shell body; 4-3. Intermediate shell top plate; 5-1. Lower flange of outer shell; 5-2. Outer shell body; 5-3. Upper flange of outer shell; 7-1. Lower flange of flow guide sleeve; 7-2. Inner shell of flow guide sleeve; 7-3. Outer shell of flow guide sleeve; 7-4. Upper flange of flow guide sleeve; 11-1. Intake pipe; 11-2. Intake air regulating cylinder; Specific embodiments Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0024] Various schematic structural diagrams according to the disclosed embodiments of the present invention are shown in the drawings. These figures are not drawn to scale, where for the purpose of clear expression, some details are enlarged and some details may be omitted. The shapes of various regions and layers shown in the figures, as well as their relative sizes and positional relationships, are only exemplary. In practice, there may be deviations due to manufacturing tolerances or technical limitations, and those skilled in the art can design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0025] Embodiment 1: In order to overcome the problem of large risks in existing storage and operation, the present invention provides a tail gas thermal oxidation treatment device and its use method as shown in Figure 1 the figure. The present invention is small in volume, suitable for coiled tubing equipment, has high temperature control accuracy, is safe to use, low in energy consumption, and convenient for inspection and maintenance.

[0026] A tail gas thermal oxidation treatment device, comprising a mounting seat 1, a heating element 2, a heat insulation lining 3, an intermediate shell 4, an outer shell 5, a guide nozzle 6, a guide sleeve 7, an air outlet pipe 9, an air intake amount adjustment device 11 and a control system 15; the intermediate shell 4 is arranged in the outer shell 5, the lower end of the air outlet pipe 9 is connected to the air intake amount adjustment device 7, and the inlet direction of the lower end of the air intake amount adjustment device 7 is tangent to the lower end shell of the outer shell 5; the outer shell 5, the intermediate shell 4 and the guide sleeve 7 form an outer flow channel; the lower end of the outer shell 5 is installed on the mounting seat 1, the heat insulation lining 3 is arranged in the intermediate shell 4 The guide nozzle 6 is arranged at the connection between the guide sleeve 7 and the intermediate shell 4; the mounting seat 1, the heat insulation lining 3 and the guide nozzle 6 form an inner flow channel; the heating element 2 is arranged in the intermediate shell 4, the lower end of the heating element 2 is connected to the mounting seat 1, the upper end of the heating element 2 is connected to the guide nozzle 6, and the heating element 2 is electrically connected to the control system 15 through the heating element power supply line 13; the guide sleeve 7 and the mounting seat 1 are both provided with temperature sensors, and the temperature sensors are connected to the control system 15 by electrical signals; the air intake adjustment device 11 is arranged at the lower part of the outer wall of the outer shell 5.

[0027] The device provided by the present invention is small in size and suitable for drilling equipment.

[0028] In the present invention, the outer shell 5 and the intermediate shell 4 adopt a multi-layer structure of concentric cylinders, which has a compact structure and a small volume, and is suitable for use in places with limited installation space.

[0029] In the present invention, the intermediate shell 4 is only used to protect the thermal insulation lining 3 to avoid damage during disassembly and assembly. The intermediate shell 4 is made of metal.

[0030] The device provided by the present invention has high temperature control accuracy and is safe to use.

[0031] The present invention controls the temperature sensor through the control system, the high temperature sensor 10 ensures the process temperature, and the low temperature sensor 12 monitors the internal temperature to ensure the normal working temperature of the electrical components.

[0032] During preheating before work, the air intake regulating device 11 is in a closed state. During work, the heating element 2 and the fireproof net 8 are always kept in a red hot state to ensure that the exhaust gas and the air do not explode. In the present invention, the heat reduction is limited to the middle shell 4 to avoid burns to personnel.

[0033] The device provided by the present invention has low energy consumption. The device provided by the present invention adopts a multi-layer structure, especially the air passes through the outer flow channel along the tangential direction, making full use of the heat. The air conditioning device can try to avoid a large amount of air entering to take away the heat. The heating element only needs to maintain the temperature, and the energy consumption is low.

[0034] The device provided by the present invention is easy to inspect and maintain. In the present invention, the various components are connected by flanges, and the heating element 2 can be easily replaced.

[0035] Example 2: Based on Embodiment 1, in the present invention, preferably, the mounting base 1 includes a bottom plate 1-1, an explosion-proof junction box 1-2, legs 1-3, a heating element fixing cylinder 1-4, and a heat-insulating lining support 1-5. The explosion-proof junction box 1-2 is provided on the lower surface of the bottom plate 1-1, and the heating element fixing cylinder 1-4 is provided at the center of the upper surface of the bottom plate 1-1; the legs 1-3 are provided around the lower surface of the bottom plate 1-1; the heat-insulating lining support 1-5 supports the heat-insulating lining 3 inside the intermediate shell 4; the heating element fixing cylinder 1-4 is connected to the heating element 2 located inside the intermediate shell 4. The present invention can be directly installed on-site. During installation, the legs 1-3 are installed at appropriate positions, the A port at the bottom plate 1-1 of the mounting base bottom 1 is connected to the tail gas pipeline to be treated, the intake air volume regulating device 11 is closed, and the power cord 14 is connected to the power supply. After confirming that the intake air volume regulating device 11 is closed, the control system 15 is turned on. When the temperature reaches the set working temperature, the intake air volume regulating device 11 is opened, and the tail gas thermal oxidation treatment device operates normally.

[0036] Preferably, the heating element 2 is a double-helix silicon carbide rod or a double-helix silicon molybdenum rod.

[0037] In the present invention, the heating element 2 is preferably a double-helix silicon carbide rod, which has a low temperature gradient across the partition and good effects. Using a double-helix silicon molybdenum rod is also possible, but the cost will be higher.

[0038] Preferably, the intermediate shell 4 includes an intermediate shell flange 4-1, an intermediate shell body 4-2, and an intermediate shell top plate 4-3. The intermediate shell body 4-2 is a hollow cylinder, and the intermediate shell top plate 4-3 is provided at the upper end of the intermediate shell body 4-2. The lower end of the intermediate shell body 4-2 is flange-connected to the outer shell 5 through the intermediate shell flange 4-1.

[0039] Preferably, the upper and lower ends of the outer shell 5 are both flange-connected to the flow guide sleeve 7 and the mounting base 1.

[0040] Preferably, the flow guide sleeve 7 includes a flow guide sleeve lower flange 7-1, a flow guide sleeve inner shell 7-2, a flow guide sleeve outer shell 7-3, and a flow guide sleeve upper flange 7-4. The flow guide sleeve upper flange 7-4 and the flow guide sleeve lower flange 7-1 are respectively provided at the upper and lower ends of the flow guide sleeve outer shell 7-3. The flow guide sleeve inner shell 7-2 is provided inside the flow guide sleeve outer shell 7-3. The flow guide sleeve inner shell 7-2 includes a vertical section, an upper opening section, and a lower opening section. The upper opening section at the upper end of the vertical section is funnel-shaped, and the lower opening section at the lower end of the vertical section is an inverted funnel-shaped; the maximum inner diameter of the upper opening section is greater than the maximum inner diameter of the lower opening section.

[0041] In the present invention, the high-temperature sensor 10 is provided at the vertical section of the flow guide sleeve inner shell 7-2.

[0042] Preferably, the air intake regulating device 11 includes an air inlet pipe 11-1 and an air intake regulating cylinder 11-2. The air intake regulating device 11 is arranged at the lower part of the outer shell 5. One end of the air inlet pipe 11-1 is located outside the outer shell 5, and the other end penetrates through the outer shell 5 and communicates with the space between the outer shell 5 and the intermediate shell 4. The air intake regulating cylinder 11-2 is arranged at the end of the air inlet pipe 11-1.

[0043] As Figure 1 shown, in the present invention, the outer shell 5 includes an outer shell lower flange 5-1, an outer shell housing 5-2, and an outer shell upper flange 5-3. The outer shell upper flange 5-3 and the outer shell lower flange 5-1 are respectively arranged at the upper and lower ends of the outer shell housing 5-2, and are respectively flange-connected to the flow guiding sleeve 7 and the mounting seat 1.

[0044] Preferably, the temperature sensor includes a high temperature sensor 10 and a low temperature sensor 12. The high temperature sensor 10 is installed on the inner shell 7-2 of the flow guiding sleeve 7 inside the flow guiding sleeve 7. The low temperature sensor 12 is installed on the bottom plate 1-1 of the mounting seat 1. Both the high temperature sensor 10 and the low temperature sensor 12 are electrically connected to the control system 15.

[0045] As Figure 1 shown, in the present invention, both the high temperature sensor 10 and the low temperature sensor 12 are prior arts, and no further description will be given in the present invention.

[0046] The high temperature sensor 10 is installed on the inner shell 7-2 of the flow guiding sleeve 7 inside the flow guiding sleeve 7 through an instrument wire 16. The purpose of installing the high temperature sensor 10 is to avoid too low temperature at the inner shell 7-2 of the flow guiding sleeve, which cannot achieve the effect of sufficient oxidation; too high temperature will reduce the service life of the heating element and increase energy consumption at the same time. The high temperature sensor 10 installed here is mainly used to adjust the heating power.

[0047] The low temperature sensor 12 is installed on the bottom plate 1-1 of the mounting seat 1 through an instrument wire 16. The purpose of installing the low temperature sensor 12 is to avoid too high temperature at the bottom plate 1-1, which will damage the electrical components at that place; too low temperature at the bottom plate 1-1 will increase the overall energy consumption of the device. The low temperature sensor 12 at the bottom plate 1-1 is mainly used to adjust the air intake volume.

[0048] When it is necessary to adjust the treatment temperature, set the stop heating temperature and the working temperature range in the control system 15. The control system 15 controls the temperature of the heating element 2 within the working temperature range, and the working temperature is set at 1000 ± 50 °C.

[0049] Preferably, a fire separation net 8 is installed above the inner part of the flow guiding sleeve 7.

[0050] The present invention provides a method for using a tail gas thermal oxidation treatment device, which includes the following steps. When the tail gas thermal oxidation treatment device is in use, connect the A port at the bottom plate 1-1 of the mounting base 1 to the tail gas pipeline to be treated; close the intake air volume adjustment device 11, turn on the control system 15, and when the temperature reaches the set working temperature, open the intake air volume adjustment device 11; the tail gas to be treated enters from the A port, undergoes a first oxidation reaction with the air entering from the B port in the space between the guiding nozzle 6 and the diversion sleeve 7 through the heating element 2, and the gas that has not fully reacted undergoes an oxidation reaction again when passing through the heat insulation net 8, and finally is discharged from the C port.

[0051] In the present invention, the air entering from the B port flows out to the preheated air.

[0052] When it is necessary to replace the heating element 2, stop feeding the tail gas to be treated before replacing the heating element 2, cut off the power supply, and after sufficient cooling, remove the connecting bolts between the mounting base 1 and the intermediate shell 4, lift the intermediate shell 4 and the heat insulation lining 3 to expose the heating element 2, remove the heating element 2, install the new heating element 2, lower the heat insulation lining 3 and the intermediate shell 4, and tighten the connecting bolts between the mounting base 1 and the intermediate shell 4. In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0053] It should also be understood that the terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the specification of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" are intended to include the plural forms.

[0054] The above examples are only illustrative of the present invention and do not constitute a limitation on the protection scope of the present invention. Any design identical or similar to the present invention falls within the protection scope of the present invention. The device structures and method steps not described in detail in the present invention are prior arts and will not be further described in the present invention.

Claims

1. A tail gas thermal oxidation treatment device, characterized in that: The invention comprises a mounting seat (1), a heating element (2), a heat insulating lining (3), an intermediate shell (4), an outer shell (5), a guide nozzle (6), a guide sleeve (7), an air outlet pipe (9), an air intake amount regulating device (11) and a control system (15); the intermediate shell (4) is arranged in the outer shell (5); the lower end of the air outlet pipe (9) is connected to the air intake amount regulating device (7); the inlet direction of the lower end of the air intake amount regulating device (7) is tangent to the lower end shell of the outer shell (5); the outer shell (5), the intermediate shell (4) and the guide sleeve (7) form an external flow channel; the lower end of the outer shell (5) is mounted on the mounting seat (1); the heat insulating lining (3) is arranged in the intermediate shell (4); the guide sleeve (7) The guide nozzle (6) is arranged at the connection between the guide sleeve (7) and the intermediate shell (4); the mounting seat (1), the heat insulation lining (3) and the guide nozzle (6) form an inner flow channel; the heating element (2) is arranged in the intermediate shell (4), the lower end of the heating element (2) is connected to the mounting seat (1), the upper end of the heating element (2) is connected to the guide nozzle (6), and the heating element (2) is electrically connected to the control system (15) through the heating element power supply line (13); the guide sleeve (7) and the mounting seat (1) are both provided with temperature sensors, and the temperature sensors are electrically connected to the control system (15); the air intake adjustment device (11) is arranged at the lower part of the outer wall of the outer shell (5).

2. The exhaust gas thermal oxidation treatment device according to claim 1, characterized in that: The mounting base (1) comprises a base plate (1-1), an explosion-proof junction box (1-2), legs (1-3), a heating element fixing cylinder (1-4), and a heat-insulating lining support (1-5); the explosion-proof junction box (1-2) is arranged on the lower surface of the base plate (1-1); the heating element fixing cylinder (1-4) is arranged at the center of the upper surface of the base plate (1-1); the legs (1-3) are arranged around the lower surface of the base plate (1-1); the heat-insulating lining support (1-5) supports the heat-insulating lining (3) in the intermediate shell (4); and the heating element fixing cylinder (1-4) is connected to the heating element (2) located in the intermediate shell (4).

3. The exhaust gas thermal oxidation treatment device according to claim 1, characterized in that: The heating element (2) is a double-helix silicon carbon rod or a double-helix silicon molybdenum rod.

4. The exhaust gas thermal oxidation treatment device according to claim 1, characterized in that: The intermediate shell (4) comprises an intermediate shell flange (4-1), an intermediate shell body (4-2) and an intermediate shell top plate (4-3); the intermediate shell body (4-2) is a hollow cylinder; the intermediate shell top plate (4-3) is arranged at the upper end of the intermediate shell body (4-2); and the lower end of the intermediate shell body (4-2) is flange-connected to the outer shell (5) via the intermediate shell flange (4-1).

5. The exhaust gas thermal oxidation treatment device according to claim 1, characterized in that: The upper and lower ends of the shell (5) are connected to the guide sleeve (7) and the mounting seat (1) via flanges.

6. The exhaust gas thermal oxidation treatment device according to claim 1, characterized in that: The guide sleeve (7) comprises a guide sleeve lower flange (7-1), a guide sleeve inner shell (7-2), a guide sleeve outer shell (7-3) and a guide sleeve upper flange (7-4); the guide sleeve upper flange (7-4) and the guide sleeve lower flange (7-1) are respectively arranged at the upper and lower ends of the guide sleeve outer shell (7-3); the guide sleeve inner shell (7-2) is arranged in the guide sleeve outer shell (7-3); the guide sleeve inner shell (7-2) comprises a vertical section, an upper opening section and a lower opening section; the upper opening section at the upper end of the vertical section is funnel-shaped, and the lower opening section at the lower end of the vertical section is inverted funnel-shaped; the maximum inner diameter of the upper opening section is greater than the maximum inner diameter of the lower opening section.

7. The exhaust gas thermal oxidation treatment device according to claim 1, characterized in that: The air intake amount regulating device (11) comprises an air intake pipe (11-1) and an air intake regulating cylinder (11-2). The air intake amount regulating device (11) is arranged at the lower part of the outer shell (5). One end of the air intake pipe (11-1) is located outside the outer shell (5), and the other end passes through the outer shell (5) and communicates with the space between the outer shell (5) and the intermediate shell (4). The air intake regulating cylinder (11-2) is arranged at the end of the air intake pipe (11-1).

8. The exhaust gas thermal oxidation treatment device according to claim 1, characterized in that: The temperature sensor comprises a high temperature sensor (10) and a low temperature sensor (12); the high temperature sensor (10) is mounted on a guide sleeve inner shell (7-2) inside the guide sleeve (7); the low temperature sensor (12) is mounted on a bottom plate (1-1) of a mounting seat (1) inside the guide sleeve (7); and both the high temperature sensor (10) and the low temperature sensor (12) are connected to a control system (15) by electrical signals.

9. The exhaust gas thermal oxidation treatment device according to claim 1, characterized in that: A fireproof net (8) is installed on the upper part of the guide sleeve (7).

10. The method for using any one of the tail gas thermal oxidation treatment devices according to claims 1-9, characterized in that: The exhaust gas thermal oxidation treatment device comprises the following steps: when in use, connecting the A port at the upper bottom plate (1-1) of the mounting seat (1) to the exhaust gas pipeline to be treated; closing the air intake regulating device (11), opening the control system (15), and opening the air intake regulating device (11) when the temperature reaches the set working temperature; the exhaust gas to be treated enters from the A port, passes through the space between the guide nozzle (6) and the guide sleeve (7) of the heating element (2), and undergoes a first oxidation reaction with the air entering from the B port; the gas that has not fully reacted undergoes an oxidation reaction again when passing through the heat insulation net (8), and is finally discharged from the C port.

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