Device and method for electromagnetic heat treatment of VOCs waste gas

Abstract

The invention relates to a device and a method for electromagnetic heat treatment of VOCs (volatile organic compounds) waste gas, and aims to treat small-volume and low-concentration VOCs waste gas. The device mainly comprises a waste gas booster fan, an air fan, a control valve group, a mixer, a heating coil, an electromagnetic heating system and a chimney unit; according to the technical scheme, the electromagnetic heating technology and the gas mixing technology are combined, waste gas in the metal pipeline is heated through vortex heat generated by the electromagnetic technology so that VOCs can be removed, smoke can reach the emission standard, the heating coil is made of stainless steel or carbon steel, the outer surface of the heating coil is wrapped with a ceramic fiber blanket so that the heat preservation effect can be enhanced, and the service life of the heating coil can be prolonged. The electromagnetic heating system comprises a winding coil and a frequency conversion control unit, the heating temperature and the standing time can be effectively controlled, and the treatment effect is guaranteed.

Description

Technical Field

[0001] The invention relates to a device and method for treating VOCs waste gas by electromagnetic heat. Background Art

[0002] The treatment of VOCs (volatile organic compounds) waste gas has always been a difficult point in the field of environmental protection. Traditional VOCs treatment technologies usually rely on high-temperature incineration. Although these methods can effectively remove harmful components in waste gas, they have some significant shortcomings. First, high-temperature incineration requires a large amount of fuel consumption, resulting in high operating costs. Secondly, incineration equipment usually occupies a large area and has a complex structure, which is not suitable for the treatment of small amounts of waste gas. In addition, temperature control during the incineration process is also more difficult. If the temperature is too low, the removal rate of VOCs will drop significantly; if the temperature is too high, it will increase equipment wear and energy consumption. In general, in order to pursue incineration efficiency, general incinerators have relatively high incineration temperatures, high fuel gas consumption, and a large area, which are not suitable for the treatment of small amounts of waste gas.

[0003] Electromagnetic heating technology is a mature technology, but this technology has not yet been used for ultra-low emissions of VOCs. Therefore, a device and method for electromagnetic heating treatment of VOCs waste gas is needed. Under the conditions of meeting certain gas heating temperature, residence time, and oxygen content, the VOCs molecules in a small amount of waste gas can be thermally decomposed, thereby increasing the treatment efficiency of the small amount of waste gas and reducing energy consumption. Summary of the Invention

[0004] The purpose of the present invention is to address the deficiencies of the above-mentioned prior art and provide a device for treating VOCs waste gas by electromagnetic heating, which is particularly suitable for treating small-volume, low-concentration VOCs waste gas. This solution combines electromagnetic heating with gas mixing technology and uses eddy current heat generated by electromagnetic technology to heat the waste gas in the metal pipe. Within the set heating temperature and residence time, VOCs in the waste gas are removed, so that the flue gas meets the emission standards. The following is a specific solution:

[0005] On the one hand, an electromagnetic heat treatment device for VOCs waste gas comprises an exhaust gas booster blower, an air blower, a control valve group, a mixer, a heating coil, an electromagnetic heating system and a chimney unit, wherein the inlet of the exhaust gas booster blower is connected to the VOCs waste gas source, for introducing the VOCs waste gas into the exhaust gas booster blower and pressurizing the VOCs waste gas, and the outlet of the exhaust gas booster blower is connected to the mixer; the inlet of the air blower is connected to the air source, and the outlet of the air blower is connected to the mixer, for providing oxygen to the mixer; the control valve group comprises at least one intake valve for adjusting the exhaust gas intake flow rate and at least one exhaust valve for adjusting the internal pressure of the system, and the intake valve is provided between the outlet of the exhaust gas booster blower and the mixer. The inlet of the mixer is connected to the outlet of the exhaust gas booster fan and the outlet of the air fan respectively, and the outlet of the mixer is connected to the inlet of the heating coil. The mixer is used to uniformly premix the exhaust gas and oxygen; the inlet of the heating coil is connected to the outlet of the mixer, and the outlet of the heating coil is connected to the inlet of the chimney unit. The heating coil is made of stainless steel or carbon steel, and the outer surface of the heating coil is wrapped with a ceramic fiber blanket; the electromagnetic heating system includes a fixed coil and a frequency conversion control unit. The fixed coil is arranged around the outside of the heating coil, and the frequency conversion control unit is connected to the fixed coil; the inlet of the chimney unit is connected to the outlet of the heating coil, and the outlet of the chimney unit is connected to the atmosphere through the exhaust port.

[0006] Furthermore, the exhaust gas booster fan is a multi-stage centrifugal fan to ensure stable pressurization of the exhaust gas under different working conditions, and the outlet exhaust gas pressure of the multi-stage centrifugal fan is not greater than 20kPa.

[0007] Furthermore, the inlet of the air blower is provided with a pre-filtering device for removing particulate matter and impurities in the air, and the outlet of the air blower is connected to the mixer through a high-temperature resistant delivery pipe to ensure the purity and stability of oxygen in the mixer to optimize the oxidation efficiency of VOCs waste gas.

[0008] Furthermore, the control valve group includes at least one variable flow control valve, a pressure regulating valve and an emergency shut-off valve, wherein the variable flow control valve adopts an electric adjustment method to adjust the intake flow of exhaust gas in real time; the pressure regulating valve monitors and adjusts the pressure inside the system through a built-in pressure sensor; the emergency shut-off valve is used to automatically close when a device fails to ensure system safety.

[0009] Furthermore, the heating coil is made of stainless steel or highly corrosion-resistant carbon steel, and the inner wall of the heating coil is coated with a heat transfer coating to enhance the corrosion resistance and heat transfer efficiency of the heating coil. The outer surface of the heating coil is wrapped with a high-density ceramic fiber blanket with a thickness of 50 to 80 mm. This fiber blanket not only has excellent thermal insulation performance, but also reduces heat loss by optimizing the winding process, so that the surface temperature of the coil is not higher than 150°C, effectively preventing the influence of thermal radiation from the external environment and improving the overall thermal efficiency of the system.

[0010] Furthermore, the fixed coil of the electromagnetic heating system is made of high-conductivity copper wire. The coil adopts a multi-layer winding structure and its number of turns, winding spacing and wire diameter are optimized through precise calculation to ensure efficient electromagnetic energy conversion at different frequencies. Combined with the dynamic adjustment of the frequency conversion control unit, the system can accurately heat the exhaust gas in the range of 760°C to 850°C, and automatically adjust the heating power according to the changes in the flow rate and composition of the exhaust gas, ensuring the stability and efficiency of the exhaust gas treatment.

[0011] Furthermore, the height of the chimney unit is at least 15 meters, and a real-time flue gas monitoring system is provided at the chimney outlet. The monitoring system includes a temperature sensor, a pressure sensor and multiple sets of gas composition analysis instruments for monitoring and recording the temperature, pressure and pollutant concentration of the flue gas.

[0012] On the other hand, a method for electromagnetic heat treatment of VOCs waste gas includes the following steps: A) pressurizing the VOCs waste gas to a set pressure through a waste gas booster fan, and maintaining the outlet waste gas pressure below 20 kPa through an automatic pressure regulation system, and the pressurized waste gas is transported to a mixer through a high-temperature resistant conveying pipe; B) introducing external air into the mixer through an air fan, and before the air enters the mixer, the air fan pre-filters it to remove particulate matter and impurities, so that the air and waste gas are premixed in the mixer with an oxygen content of 5%±0.2%; C) passing the premixed waste gas through a heating coil, and heating the coil through an electromagnetic heating system, and the heating temperature range is 760°C to 850°C; D) the heated waste gas is discharged into the atmosphere through a chimney unit, and the monitoring system monitors the temperature, pressure and pollutant concentration of the exhaust gas in real time, and the monitoring data is transmitted to the terminal for automatic analysis and generation of an emission report.

[0013] Beneficial effects: This solution can adapt to a variety of waste gas treatment conditions, has the characteristics of small footprint and flexible use, and is especially suitable for the treatment of small amounts of VOCs waste gas; the electromagnetic heating system adopts variable frequency control technology to automatically adjust the heating power according to the real-time changes in the waste gas flow and composition, ensuring the optimization of energy utilization during the heating process. This heating solution is suitable for the treatment of small amounts of VOCs waste gas; by adopting multi-stage centrifugal fan boosting, precision-controlled electric regulating valves and multi-layer stacked winding coils, precise boosting and efficient heating of the waste gas can be achieved, ensuring that the VOCs waste gas is fully oxidized and decomposed during the treatment process; by setting an emergency shut-off valve and an automatic pressure regulation system, it can quickly respond and protect the safety of equipment and operators in the event of a system failure or abnormality. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the pipeline principle of a device for treating VOCs waste gas with electromagnetic heat;

[0015] Figure 2 This is a schematic diagram of the structural connection of the electromagnetic heating system of a device for electromagnetic heat treatment of VOCs waste gas;

[0016] Figure 3 This is a flow chart of a method for treating VOCs waste gas using electromagnetic heat;

[0017] In the figure: 1. Exhaust gas booster fan, 2. Air fan, 3. Control valve group, 4. Mixer, 5. Heating coil, 6. Electromagnetic heating system, 7. Chimney, 8. Winding coil. DETAILED DESCRIPTION

[0018] In order to deepen the understanding of the present invention, the present invention will be further described in detail below with reference to embodiments and drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention.

[0019] Please see Figure 1-3The present invention provides a device for treating VOCs waste gas by electromagnetic heat, comprising a waste gas booster fan 1, an air blower 2, a control valve group 3, a mixer 4, a heating coil 5, an electromagnetic heating system 6 and a chimney unit 7. The inlet of the waste gas booster fan 1 is connected to the VOCs waste gas source, for introducing the VOCs waste gas into the waste gas booster fan 1 and pressurizing the VOCs waste gas. The outlet of the waste gas booster fan 1 is connected to the mixer 4; the inlet of the air blower 2 is connected to the air source, and the outlet of the air blower 2 is connected to the mixer 4 for providing oxygen to the mixer 4; the control valve group 3 includes at least one intake valve for adjusting the waste gas intake flow rate and at least one exhaust valve for adjusting the internal pressure of the system. The intake valve is provided on the waste gas booster fan 1 and the mixer 4; the inlet of the mixer 4 is connected to the outlet of the exhaust gas booster fan 1 and the outlet of the air fan 2 respectively, the outlet of the mixer 4 is connected to the inlet of the heating coil 5, and the mixer 4 is used to uniformly premix the exhaust gas and oxygen; the inlet of the heating coil 5 is connected to the outlet of the mixer 4, and the outlet of the heating coil 5 is connected to the inlet of the chimney unit 7. The material of the heating coil 5 is stainless steel or carbon steel, and the outer surface of the heating coil 5 is wrapped with a ceramic fiber blanket; the electromagnetic heating system 6 includes a fixed coil 8 and a frequency conversion control unit. The fixed coil 8 is arranged around the outside of the heating coil 5, and the frequency conversion control unit is connected to the fixed coil 8. The electromagnetic heating system 6 also includes a frequency conversion control unit for control and a power supply. Variable frequency power output module; the inlet of the chimney unit 7 is connected to the outlet of the heating coil 5, and the outlet of the chimney unit 7 is connected to the atmosphere through the exhaust port; the exhaust gas booster fan 1 is a multi-stage centrifugal fan to ensure stable pressurization of the exhaust gas under different working conditions, and the outlet exhaust gas pressure of the multi-stage centrifugal fan is not more than 20kPa; the inlet of the air fan 2 is provided with a pre-filtering device for removing particulate matter and impurities in the air, and the outlet of the air fan 2 is connected to the mixer 4 through a high-temperature resistant conveying pipe to ensure the purity and stability of oxygen in the mixer 4 to optimize the oxidation efficiency of VOCs exhaust gas; the control valve group 3 includes at least one variable flow control valve, a pressure regulating valve and an emergency shut-off valve, wherein the variable flow control valve adopts an electric regulating valve. The air flow control mode is used to adjust the intake flow of exhaust gas in real time; the pressure regulating valve monitors and adjusts the pressure inside the system through the built-in pressure sensor; the emergency shut-off valve is used to automatically close when a device fails to ensure system safety; the heating coil 5 is made of stainless steel or highly corrosion-resistant carbon steel, and the inner wall of the heating coil 5 is coated with a heat transfer coating to enhance the corrosion resistance and heat transfer efficiency of the heating coil 5. The outer surface of the heating coil 5 is wrapped with a high-density ceramic fiber blanket with a thickness of 50 to 80 mm. This fiber blanket not only has excellent thermal insulation performance, but also reduces heat loss through optimized winding process, so that the surface temperature of the coil is not higher than 150°C, effectively preventing the influence of thermal radiation from the external environment and improving the overall thermal efficiency of the system;The fixed coil 8 of the electromagnetic heating system 6 is made of high-conductivity copper wire. The coil adopts a multi-layer stacked winding structure, and its number of turns, winding spacing, and wire diameter are optimized through precise calculations to ensure efficient electromagnetic energy conversion at different frequencies. Combined with the dynamic adjustment of the frequency conversion control unit, the system can accurately heat the exhaust gas within a range of 760°C to 850°C, and automatically adjust the heating power based on the flow rate and composition of the exhaust gas, ensuring stable and efficient exhaust gas treatment. The chimney unit 7 is at least 15 meters tall, and a real-time flue gas monitoring system is installed at the chimney 7 outlet. The monitoring system includes temperature sensors, pressure sensors, and multiple gas composition analyzers to monitor and record the flue gas temperature, pressure, and pollutant concentration.

[0020] The present invention also provides a method for treating VOCs waste gas in the above-mentioned electromagnetic heat treatment device for VOCs waste gas: step A) introducing VOCs waste gas from a waste gas source into the device through a waste gas booster fan 1, the booster fan is a multi-stage centrifugal fan, and can boost the waste gas to a set pressure range of 15-20kPa. During the boosting process, the system's automatic pressure regulating device monitors and adjusts the waste gas pressure in real time to ensure the stability of waste gas transportation. The boosted waste gas is transported to the mixer 4 through a specially made high-temperature resistant delivery pipe;

[0021] Step B) introducing outside air into the mixer 4 through the air blower 2. A multi-stage filter system is provided at the inlet of the air blower 2. The primary filter is a high-efficiency particulate filter for removing most particulate matter and impurities in the air to ensure air cleanliness. Before the air enters the mixer 4, the air cleanliness is monitored in real time by an online sensor to ensure that the air entering the mixer 4 is pure and has a stable oxygen content. The air and exhaust gas are fully premixed in the mixer 4 at an oxygen content of 5% ± 0.2%. The exhaust gas and oxygen are evenly mixed by the spiral mixing blade device in the mixer 4 to optimize the subsequent heating and reaction efficiency;

[0022] Step C) The premixed exhaust gas is introduced into the heating coil 5. The heating coil 5 is made of highly corrosion-resistant stainless steel or special carbon steel, the inner wall of which is treated with an anti-corrosion coating and the exterior is wrapped with a high-density ceramic fiber blanket with a thickness of 60-80 mm. The heating coil 5 is heated by an electromagnetic heating system 6. The fixed coil 8 in the system is wound with high-conductivity copper wire. In conjunction with the frequency conversion control unit, the heating power and temperature are dynamically adjusted according to the changes in the exhaust gas flow rate and composition, so that the exhaust gas temperature is maintained in the range of 760°C to 850°C. At this temperature, the VOCs molecules in the exhaust gas are fully decomposed, achieving the purpose of efficient treatment;

[0023] Step D) The heated exhaust gas is discharged into the atmosphere through the chimney unit 7. The chimney 7 is not less than 15 meters high and is equipped with a real-time flue gas monitoring system on the top. The monitoring system includes a temperature sensor, a pressure sensor, and multiple gas composition analyzers. It can monitor the temperature, pressure, and concentration of pollutants such as non-methane total hydrocarbons in real time. The monitoring data is uploaded to the terminal device in real time via a wireless transmission system. The terminal automatically analyzes the data, generates an emission report, and automatically adjusts the system operating parameters based on the analysis results.

[0024] For the purpose of greater clarity, the present invention is described in detail with reference to the following examples.

[0025] Example 1:

[0026] The application scenario of an electromagnetic heat treatment device and method for VOCs waste gas is the treatment of small-volume VOCs waste gas in a chemical enterprise. The VOCs waste gas generated by the enterprise mainly comes from the volatilization of solvents in the production process. The waste gas contains harmful volatile organic compounds such as benzene, toluene, and xylene. The total amount of waste gas is about 2000Nm 3 / h, the concentration of VOCs in the exhaust gas is 300mg / Nm 3 According to the above conditions, the electromagnetic heat treatment system designed in this embodiment includes the following components:

[0027] A multi-stage centrifugal fan with a high-efficiency impeller design is used to increase the pressure of the exhaust gas to 15kPa, ensuring that the exhaust gas can enter the mixer 4 stably. A high-efficiency centrifugal fan with a multi-stage filter is used. The air blower 2 pre-treats the air through the multi-stage filter located at the inlet to remove particulate matter in the air and ensure the purity of oxygen. The air and exhaust gas are pre-mixed in the mixer 4 with an oxygen content of 5% to ensure the adequacy of the subsequent oxidation process. The system is equipped with a variable flow control valve and a pressure regulating valve. The variable flow control valve adjusts the exhaust gas intake flow in real time to ensure that the system can operate smoothly under various working conditions. The pressure regulating valve automatically adjusts the internal pressure of the system to maintain the normal operating pressure of the system.

[0028] The heating coil 5 is made of 310S stainless steel with a diameter of DN90. The inner wall is specially coated and the outer surface is wrapped with a ceramic fiber blanket with a thickness of 60mm. The electromagnetic heating system 6 uses high-conductivity copper wire to wind the coil 8. The electromagnetic field frequency is adjusted in conjunction with the frequency conversion control unit to achieve flexible treatment of small-volume, low-concentration exhaust gas. The single-unit power is 120kW, and the exhaust gas temperature is precisely controlled at 800℃. At this temperature, the VOCs molecules in the exhaust gas are efficiently decomposed; the heated flue gas is discharged through a chimney unit 7 with a height of 18 meters. A real-time flue gas monitoring system is installed on the chimney 7. The system is equipped with multiple sets of gas composition analysis instruments and temperature and pressure sensors. The monitoring data is automatically uploaded to the central control system to monitor emission compliance in real time.

[0029] After the system installation and commissioning of this embodiment was completed, operating data showed that the treatment efficiency of VOCs waste gas was as high as 99.9%, and the concentration of non-methane total hydrocarbons in the treated flue gas was less than 60 mg / Nm3, meeting the national environmental protection emission standards. At the same time, the system operated stably with low energy consumption, meeting the company's energy conservation and emission reduction requirements and the treatment requirements for small amounts of VOCs waste gas.

[0030] Example 2:

[0031] In the waste gas treatment of an electronic manufacturing enterprise, the VOCs waste gas produced has the characteristics of low concentration, small volume, and high composition complexity. The waste gas emitted during the production process of this enterprise contains trace amounts of formaldehyde and volatile organic compounds. The total amount of waste gas is 1000Nm 3 / h, VOCs concentration is 100mg / Nm 3 .

[0032] To cope with this special situation, a small electromagnetic heat treatment VOCs exhaust gas device in this embodiment is equipped with a low-noise, multi-stage centrifugal fan. The fan can pressurize the exhaust gas to 10kPa and adopt an automatic pressure regulation system to maintain a stable exhaust gas delivery pressure. An air blower 2 equipped with a HEPA filter is used to ensure that the air entering the mixer 4 is absolutely clean. The outlet of the air blower 2 is connected to the mixer 4. The air and exhaust gas are fully premixed in the mixer 4, and the oxygen content is controlled at 5.2%. A heating coil 5 with a diameter of DN80 is used. The material is highly corrosion-resistant carbon steel, the inner wall is treated with an anti-corrosion coating, and the outside is wrapped with a 70mm thick ceramic fiber blanket. The electromagnetic heating system 6 provides stable electromagnetic heating through multi-layer stacked coils, and cooperates with the frequency conversion control unit to heat the exhaust gas to 770°C, effectively removing the VOCs components in the exhaust gas. The treated exhaust gas is discharged through a 15-meter-high chimney 7. An intelligent monitoring system is installed on the top of the chimney 7 to monitor temperature, pressure and pollutant concentrations. The data is automatically uploaded and analyzed to ensure that emissions meet national standards. After debugging, the system operates stably and performs well in the treatment of low-concentration VOCs exhaust gas with a treatment efficiency of up to 98%. The treated exhaust gas meets the relevant national emission standards. The equipment operates stably and occupies a small area, which is suitable for the exhaust gas treatment needs of small manufacturing enterprises.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A device for treating VOCs waste gas by electromagnetic heat, characterized in that: The invention comprises an exhaust gas booster fan, an air fan, a control valve group, a mixer, a heating coil, an electromagnetic heating system and a chimney unit. The inlet of the exhaust gas booster fan is connected to a VOCs exhaust gas source, and is used to introduce VOCs exhaust gas into the exhaust gas booster fan and boost the VOCs exhaust gas. The outlet of the exhaust gas booster fan is connected to the mixer. The inlet of the air fan is connected to an air source, and the outlet of the air fan is connected to the mixer, and is used to provide oxygen to the mixer. The control valve group comprises at least one intake valve for adjusting the exhaust gas intake flow rate and at least one exhaust valve for adjusting the internal pressure of the system. The intake valve is arranged between the outlet of the exhaust gas booster fan and the mixer. The inlet is connected to the outlet of the exhaust gas booster fan and the outlet of the air fan respectively, the outlet of the mixer is connected to the inlet of the heating coil, and the mixer is used to uniformly premix the exhaust gas and oxygen; the inlet of the heating coil is connected to the outlet of the mixer, and the outlet of the heating coil is connected to the inlet of the chimney unit. The material of the heating coil is stainless steel or carbon steel, and the outer surface of the heating coil is wrapped with a ceramic fiber blanket; the electromagnetic heating system includes a fixed coil and a frequency conversion control unit, the fixed coil is arranged around the outside of the heating coil, and the frequency conversion control unit is connected to the fixed coil; the inlet of the chimney unit is connected to the outlet of the heating coil, and the outlet of the chimney unit is connected to the atmosphere through the exhaust port.

2. The device for treating VOCs waste gas by electromagnetic heat according to claim 1, characterized in that: The exhaust gas booster fan is a multi-stage centrifugal fan, and the outlet exhaust gas pressure of the multi-stage centrifugal fan is not greater than 20 kPa.

3. The device for treating VOCs waste gas by electromagnetic heat according to claim 1, characterized in that: The inlet of the air blower is provided with a pre-filtering device for removing particles and impurities in the air, and the outlet of the air blower is connected to the mixer through a high temperature resistant conveying pipeline.

4. The device for treating VOCs waste gas by electromagnetic heat according to claim 1, characterized in that: The control valve group includes at least one variable flow control valve, a pressure regulating valve and an emergency shut-off valve, wherein the variable flow control valve adopts an electric adjustment method to adjust the intake flow of the exhaust gas in real time; the pressure regulating valve monitors and adjusts the pressure inside the system through a built-in pressure sensor; the emergency shut-off valve is used to automatically close when a device fails.

5. The device for treating VOCs waste gas by electromagnetic heat according to claim 1, characterized in that: The heating coil is made of stainless steel or highly corrosion-resistant carbon steel, the inner wall of the heating coil is coated with a heat transfer coating, and the outer surface of the heating coil is wrapped with a high-density ceramic fiber blanket with a thickness of 50 to 80 mm.

6. The device for treating VOCs waste gas by electromagnetic heat according to claim 1, characterized in that: The fixed coil of the electromagnetic heating system is made of high conductivity copper wire.

7. The device for treating VOCs waste gas by electromagnetic heat according to claim 1, characterized in that: The height of the chimney unit is at least 15 meters, and a real-time flue gas monitoring system is provided at the chimney outlet. The monitoring system includes a temperature sensor, a pressure sensor and multiple groups of gas composition analysis instruments for monitoring and recording the temperature, pressure and concentration of pollutants of the flue gas.

8. A method for treating VOCs waste gas with electromagnetic heat, wherein the treatment of VOCs waste gas is achieved by using a device according to any one of claims 1 to 7, characterized in that: The following steps are involved: A) The VOCs waste gas is pressurized to a set pressure through a waste gas booster fan, and the outlet waste gas pressure is maintained below 20kPa through an automatic pressure regulating system. The pressurized waste gas is transported to the mixer through a high-temperature resistant conveying pipe; B) The outside air is introduced into the mixer through an air fan. Before the air enters the mixer, the air fan pre-filters it to remove particulate matter and impurities, so that the air and waste gas are premixed in the mixer with an oxygen content of 5%±0.2%; C) The premixed waste gas passes through a heating coil, and the coil is heated by an electromagnetic heating system, and the heating temperature ranges from 760℃ to 850℃; D) The heated waste gas is discharged into the atmosphere through a chimney unit, and the monitoring system monitors the temperature, pressure and pollutant concentration of the exhaust gas in real time, and the monitoring data is transmitted to the terminal for automatic analysis and generation of an emission report.

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