An energy-saving negative electrode material heat treatment volatile organic waste gas purification system

Abstract

The present invention discloses an energy-saving negative electrode material heat treatment volatile organic waste gas purification treatment system, comprising a sedimentation buffer whose air inlet is connected to an organic waste gas delivery pipe and realizes sedimentation of easily sedimentable substances in the organic waste gas, an explosion-proof mixed air system connected to the air outlet of the sedimentation buffer and realizes mixing of the organic waste gas with air, a thermal storage oxidation furnace connected to the air outlet of the explosion-proof mixed air system and oxidizing the organic waste gas, and an exhaust gas treatment system connected to the air outlet of the thermal storage oxidation furnace and purifying the exhaust gas discharged from the thermal storage oxidation furnace; in this solution, by providing a sedimentation buffer, sedimentation of sedimentary substances in the organic waste gas is first achieved before incineration, effectively avoiding the problem of carbon particles and asphalt deposition in the collection pipe during the incineration process. At the same time, the "water washing" process before organic waste gas treatment in the prior art is eliminated, avoiding secondary pollution and salvage operations of tar-containing hazardous wastes.

Description

Technical Field

[0001] This invention belongs to the field of tail gas purification in the heat treatment of anode materials, and more specifically relates to an energy-saving system for purifying volatile organic waste gas from the heat treatment of anode materials. Background Technology

[0002] The high concentration of organic waste gas generated during the heat treatment and volatilization process of the negative electrode material under the protection of inert gases such as nitrogen is due to its complex composition, pale yellow color, and strong pungent odor. The organic waste gas mainly contains methane and other alkanes, alkenes, benzene, toluene, ethylbenzene, hydroxyl sulfur, hydrogen sulfide, methanethiol, carbon monoxide, etc. The concentration of organic waste gas is generally higher than 12,000 ppm, approaching the methane explosion limit, and the waste gas temperature is high, containing asphalt, tar, and a small amount of carbon black particles.

[0003] The above-mentioned organic waste gas is generally treated by thermal oxidation (incineration). Conventional incineration processes can easily lead to the deposition of carbon particles and asphalt in the collection pipes, and even blockage of the heat storage ceramics in the incinerator's filter section and preheating section.

[0004] To address the aforementioned particulate matter deposition problem, the industry often employs water washing and spraying as a first step in treating this type of organic waste gas. This removes particles containing asphalt, tar, and small amounts of carbon black (sediment) before the gas is passed into an incinerator for oxidation. This method significantly reduces the combustible components in the organic waste gas, generating large quantities of tar-containing hazardous waste, increasing the company's hazardous waste collection and treatment costs, polluting the production environment, and substantially increasing the auxiliary fuel costs during the incineration oxidation process. Summary of the Invention

[0005] The purpose of this invention is to provide an energy-saving system for purifying volatile organic waste gas generated during the heat treatment of negative electrode materials, thereby overcoming the deficiencies in existing organic waste gas treatment technologies.

[0006] The present invention provides an energy-saving negative electrode material heat treatment volatile organic waste gas purification system, comprising an inlet connected to an organic waste gas conveying pipe for settling easily settled substances in the organic waste gas, an explosion-proof mixing system connected to the outlet of the settling buffer for mixing the organic waste gas with air, a regenerative oxidizer connected to the outlet of the explosion-proof mixing system for oxidizing the organic waste gas, and a tail gas treatment system connected to the outlet of the regenerative oxidizer for purifying the tail gas discharged from the regenerative oxidizer.

[0007] The settling buffer is equipped with a slag discharge port, which is connected to an electric arc gasification system. The outlet of the electric arc gasification system is connected to a cyclone separator. The settling material settled by the settling buffer enters the electric arc gasification system through the slag discharge port and is gasified. Finally, it enters the cyclone separator to separate carbon black particles. The gasified gas enters the explosion-proof mixing system through the outlet of the cyclone separator.

[0008] Preferably, the gas outlet of the regenerative oxidizer is connected to a first gas guide pipe and a second gas guide pipe. The other ends of the first gas guide pipe and the second gas guide pipe are respectively connected to a heat transfer oil heat exchanger and an air heat exchanger. The exhaust gas after being cooled by the heat transfer oil heat exchanger and the air heat exchanger enters the exhaust gas treatment system.

[0009] Preferably, the bottom of the settling buffer is provided with a heating coil for heating the settling material, and the two ends of the heating coil are respectively connected to the two oil ports of the heat transfer oil heat exchanger.

[0010] Preferably, the air heat exchanger includes a first air inlet, a second air inlet, a third air inlet, and a fourth air inlet. The first air inlet and the second air inlet are connected and respectively connected to a second air guide pipe and an exhaust gas treatment system. The third air inlet and the fourth air inlet are connected. The third air inlet is connected to the air inlet of the explosion-proof mixing system, and the fourth air inlet is connected to a fresh air duct that draws in external air.

[0011] Preferably, the fresh air duct is equipped with a proportional valve, which is controlled by a pressure signal within the explosion-proof mixing system and supplies fresh air to the explosion-proof mixing system as needed.

[0012] Preferably, the fresh air duct is also connected to a first pneumatic valve and a second pneumatic valve, both of which are connected in parallel with the proportional valve. Both the first and second pneumatic valves are controlled to open and close by a gas concentration signal within the explosion-proof mixing system. The explosion-proof mixing system is equipped with two combustible gas alarms, which obtain the gas concentration within the explosion-proof mixing system.

[0013] Preferably, the connection end between the fresh air duct and the air heat exchanger is connected to a bypass pipe via a tee, the bypass pipe is connected in parallel with the air heat exchanger and its other end is connected to the air inlet of the explosion-proof mixing system.

[0014] Preferably, the organic waste gas conveying pipe is provided with an organic gas inlet regulating valve for adjusting the pressure of the organic waste gas entering the settling buffer.

[0015] Preferably, the electric arc vaporization system is connected to a nitrogen inlet pipe, and the explosion-proof mixing system is connected to a spray device for cooling the exterior of the explosion-proof mixing system.

[0016] Preferably, the exhaust gas treatment system includes an SCR denitrification system, a high-temperature bag filter, an alkaline scrubbing tower, a water scrubbing tower, a centrifugal fan, and a high-altitude exhaust chimney arranged in sequence; the exhaust gas discharged from the regenerative oxidizer is cooled by a heat transfer oil heat exchanger and the air heat exchanger before being directly sent to the SCR denitrification system.

[0017] The beneficial effects of the energy-saving negative electrode material heat treatment volatile organic waste gas purification system of the present invention are as follows:

[0018] 1. By setting up a settling buffer, the sediment in the organic waste gas (asphalt, tar, and a small amount of carbon black particles) is pre-sedied before incineration, effectively avoiding the problem of carbon particles and asphalt depositing in the collection pipe during the incineration process. At the same time, the "water washing" process before organic waste gas treatment in existing technologies is eliminated, avoiding secondary pollution from tar-containing hazardous waste and the need for retrieval operations.

[0019] 2. An electric arc gasification system and a cyclone separator are installed to process the sediment, gasify and separate the sediment to separate carbon black particles. The carbon black particles can be reused as raw materials, or even shaped for use in negative electrode materials. Attached Figure Description

[0020] Figure 1 This is a system schematic diagram of an energy-saving negative electrode material heat treatment volatile organic waste gas purification system according to the technical solution of the present invention. Detailed Implementation

[0021] To facilitate understanding of the technical solution of the present invention by those skilled in the art, the technical solution of the present invention will now be further described in conjunction with the accompanying drawings.

[0022] like Figure 1 The present invention provides an energy-saving negative electrode material heat treatment volatile organic waste gas purification system, comprising an inlet connected to an organic waste gas conveying pipe 19 for settling easily settled substances (the main components of the settled substances are asphalt, tar and a small amount of carbon black particles) in the organic waste gas; an explosion-proof mixing system connected to the outlet of the settling buffer for mixing the organic waste gas with air; a regenerative oxidizer connected to the outlet of the explosion-proof mixing system for oxidizing the organic waste gas; and a tail gas treatment system connected to the outlet of the regenerative oxidizer for purifying the tail gas discharged from the regenerative oxidizer.

[0023] The main components of the aforementioned easily settling substances are asphalt, tar, and a small amount of carbon black particles. On the one hand, these substances have relatively large particles, making them easy to settle under their own gravity. On the other hand, they have relatively low boiling points, so they settle first when the temperature of the organic waste gas decreases.

[0024] Based on the above technical solution, after the organic waste gas is settled by the settling buffer, the remaining waste gas enters the explosion-proof mixing system and is evenly mixed with the air to obtain a mixed gas. The mixed gas enters the regenerative thermal oxidizer for incineration, and the exhaust gas is obtained after incineration (the main components of the exhaust gas are carbon dioxide, nitrogen and water vapor, as well as trace amounts of nitrogen oxides). The exhaust gas then enters the exhaust gas treatment system to achieve cooling and removal of nitrogen oxides. Finally, low-temperature nitrogen and carbon dioxide are emitted into the air, which meets the emission standards.

[0025] In the above technical solution, by setting up a settling buffer, the settling substances (asphalt, tar, and a small amount of carbon black particles) in the organic waste gas are pre-sedied before incineration, effectively avoiding the problem of carbon particles and asphalt depositing in the collection pipe during the incineration process. At the same time, the "water washing" process before organic waste gas treatment in existing technologies is eliminated, avoiding secondary pollution from tar-containing hazardous waste and the need for retrieval operations.

[0026] In this technical solution, the settling buffer is equipped with a slag discharge port, which is connected to an electric arc gasification system. The outlet of the electric arc gasification system is connected to a cyclone separator. The settling material from the settling buffer enters the electric arc gasification system through the slag discharge port and is gasified. Finally, it enters the cyclone separator, where carbon black particles are separated. The gasified gas enters the explosion-proof mixing system from the outlet of the cyclone separator.

[0027] Based on the above technical solution, by setting up an electric arc gasification system with an operating temperature above 1800℃, the asphalt and tar in the sediment are instantly gasified. Under nitrogen protection, the gasified asphalt and tar, along with the ungasified carbon black particles, enter a cyclone separator to separate the carbon black particles and the gasified gas. The gasified gas then enters an explosion-proof mixing system to mix with air before entering a regenerative oxidizer for incineration. The carbon black particles are collected and, after shaping and other processing, can be recycled and reused as raw materials.

[0028] Based on the above technical solution, on the one hand, the treatment of sedimented material is realized, solving the problem of sedimented material treatment; on the other hand, the sedimented material is converted into fuel, ensuring the combustible components of organic waste gas and reducing the use of auxiliary fuel; at the same time, the recovery and utilization of raw materials (carbon black particles) are realized, saving costs.

[0029] In the technical solution of this invention, a first gas guide pipe 11 and a second gas guide pipe 12 are connected in parallel to the gas outlet of the regenerative oxidizer. The other ends of the first gas guide pipe 11 and the second gas guide pipe 12 are respectively connected to a heat transfer oil heat exchanger and an air heat exchanger. The exhaust gas after being cooled by the heat transfer oil heat exchanger and the air heat exchanger enters the exhaust gas treatment system. That is, the exhaust gas in the heat transfer oil heat exchanger and the air heat exchanger is connected to the air inlet of the SCR denitrification system in the exhaust gas treatment system through gas pipe 16 and gas pipe 17 respectively.

[0030] Based on the above technical solution, the exhaust gas emitted from the regenerative oxidizer has a temperature of about 500°C. It is separated by the first gas guide pipe 11 and the second gas guide pipe 12 and enters the heat transfer oil heat exchanger and the air heat exchanger respectively, so as to utilize the heat in the exhaust gas and reduce the exhaust gas temperature. This reduces the combustion cost and the exhaust gas treatment cost.

[0031] High-temperature (around 500℃) exhaust gas enters the heat transfer oil heat exchanger, heating the heat transfer oil inside to approximately 150℃ to 180℃. This high-temperature heat transfer oil is then pumped into a settling buffer. A heating coil is installed at the bottom of the settling buffer to heat the settled material. Both ends of the heating coil are connected to the two oil ports of the heat transfer oil heat exchanger. In other words, the high-temperature exhaust gas heats the heat transfer oil in the heat transfer oil heat exchanger to approximately 150℃ to 180℃, and then pumps it into the heating coil of the settling buffer. The heating coil heats the settled material (asphalt, tar, and a small amount of carbon black particles) inside the settling buffer. At this temperature, the settled material inside the settling buffer is completely in a fluid state (a small amount of carbon black particles form a relatively fluid black emulsion with the liquid asphalt and tar), and is slowly pumped into an electric arc gasification system (electric arc gasification furnace) under inert gas (nitrogen) protection.

[0032] The temperature inside the electric arc gasification furnace exceeds 1800℃. The pumped-in asphalt and tar are instantly vaporized. Under nitrogen protection, the carbon black particles are first separated by a cyclone separator. The vaporized asphalt and tar are then introduced into an explosion-proof mixing system through collection pipe 20 to mix with air before being sent to a regenerative oxidizer for combustion and oxidation into carbon dioxide and water. The carbon black particles separated by the cyclone separator are then shaped and used as raw materials for the negative electrode material.

[0033] In this technical solution, the air heat exchanger includes a first air port, a second air port, a third air port, and a fourth air port. The first air port and the second air port are connected and used to transport high-temperature exhaust gas.

[0034] That is, the first air port and the second air port are respectively connected to the second air guide pipe 12 and the exhaust gas treatment system, and the second air port is connected to the air inlet of the SCR denitrification system through the air pipe 17.

[0035] The third and fourth air ports are connected. The third air port is connected to the air inlet of the explosion-proof mixing system via air pipe 15. The fourth air port is connected to a fresh air duct 13 that draws in outside air. Outside air enters the air heat exchanger through the fresh air duct 13. After being heated in the air heat exchanger, the air is delivered to the explosion-proof mixing system through air pipe 15. Delivering hot air at a certain temperature to the explosion-proof mixing system serves two purposes: firstly, it mixes the air with the organic waste gas, reducing the concentration of the organic waste gas and preventing it from reaching explosive levels; secondly, it provides sufficient oxygen for the combustion of the organic waste gas. Furthermore, delivering air at a certain temperature to the explosion-proof mixing system ensures that the internal temperature of the system is maintained between 80 and 150°C, preventing high-boiling-point substances in the organic waste gas from condensing and settling in the mixing chamber due to excessively low temperatures.

[0036] In this technical solution, to ensure and control the air supplied to the explosion-proof mixing system, a proportional valve 3 is installed on the fresh air duct 13. The proportional valve 3 is controlled by the pressure signal obtained from the pressure transmitter in the explosion-proof mixing system and supplies fresh air to the explosion-proof mixing system as needed.

[0037] The on-demand supply of fresh air operates as follows: A pressure sensor is installed within the explosion-proof mixing system to obtain the internal pressure. This pressure value is transmitted to the controller in real time. Simultaneously, a fixed pressure value for the explosion-proof mixing system is input into the controller. The proportional valve 3 is controlled in real time based on the real-time and fixed pressure values. When the real-time pressure value is lower than the fixed pressure value, air needs to be supplied to the explosion-proof mixing system. The proportional valve 3 then opens, supplying air to the system and mixing the organic waste gas with the air.

[0038] In this scheme, the gas pressure in the explosion-proof mixed air system is controlled by both organic waste gas and air. A pressure transmitter is installed in the settling buffer to obtain the pressure value in the settling buffer and transmit the pressure value on the transmitter to the controller. The controller controls the proportional opening of the proportional valve 3 to adjust the amount of air supplied to the explosion-proof mixed air system in real time according to the pressure of organic waste gas in the settling buffer. This enables the proportional mixing of organic waste gas and air, ensuring the full oxidation of organic waste gas.

[0039] An organic gas inlet regulating valve 1 is installed on the organic waste gas conveying pipe 19 to regulate the pressure of the organic waste gas entering the settling buffer. The organic gas inlet regulating valve 1 can be manually controlled or automatically controlled by a controller. By controlling the gas flow rate and velocity entering the settling buffer, the gas pressure entering the settling buffer can be controlled. By controlling the gas pressure entering the settling buffer, the amount and pressure of organic waste gas entering the explosion-proof mixing system can be controlled. The pressure of the entering organic waste gas, together with the fixed pressure value set in the explosion-proof mixing system, adjusts the opening of the proportional valve 3 on the fresh air pipe 13, realizing the on-demand delivery of fresh air. On-demand delivery of fresh air can achieve proportional mixing of organic waste gas and air, ensuring the full oxidation of organic waste gas.

[0040] In the above technical solution, the negative pressure value of the settling buffer should be controlled between -20 Pa and -40 Pa by the gas inlet regulating valve 1. If the negative pressure inside the settling buffer is too low, the volatiles cannot be discharged in time, resulting in unqualified volatile content in the product; if the negative pressure inside the settling buffer is too high, it will cause gas to be drawn in from the inlet and outlet of the heat treatment carbonization furnace and the sealing coil, causing safety accidents such as fire.

[0041] In this technical solution, the fresh air duct 13 is also connected to a first pneumatic valve 2 and a second pneumatic valve 4. Both the first pneumatic valve 2 and the second pneumatic valve 4 are connected in parallel with the proportional valve 3. The opening and closing of both the first pneumatic valve 2 and the second pneumatic valve 4 are controlled by the gas concentration signal within the explosion-proof mixing system. Two combustible gas alarms are installed within the explosion-proof mixing system, and the two combustible gas alarms obtain the gas concentration within the explosion-proof mixing system.

[0042] Based on the above technical solution, the first pneumatic valve 2 and the second pneumatic valve 4 are linked with two combustible gas alarms in the explosion-proof mixing system, and the alarm actions are set with gradients. For example, when the combustible gas concentration in the explosion-proof mixing system reaches 60%, the first pneumatic valve 2 automatically opens, and the proportional valve 3 remains open. At this time, air enters through the first pneumatic valve 2 to dilute the concentration. When the combustible gas concentration in the explosion-proof mixing system drops below 60%, it automatically closes, and the proportional valve 3 remains open and operates normally. When the combustible gas concentration reaches 65%, the second pneumatic valve 4 automatically opens to adjust the combustible gas concentration in the mixing box. At this time, the proportional valve 3 remains open and operates normally. When the concentration decreases, the second pneumatic valve 4 closes, and the proportional valve 3 operates independently.

[0043] In the above technical solution, the purpose of adjusting the gas pressure in the explosion-proof mixing system by the first pneumatic valve 2 and the second pneumatic valve 4 is to reduce the concentration of combustible gas in the explosion-proof mixing system so that the concentration of combustible gas does not reach the lower explosive limit. Otherwise, when the temperature in the explosion-proof mixing system reaches above 250°C during operation, an explosion may occur at any time.

[0044] In this technical solution, if the temperature inside the explosion-proof mixing system is too high after the concentration of combustible gas in the system reaches the lower explosive limit, it will have ignition energy and ignite the combustible gas. Therefore, a bypass pipe 14 is installed to supply unheated air to the explosion-proof mixing system. Specifically, the bypass pipe 14 is connected to the connection point between the fresh air duct 13 and the air heat exchanger via a tee. The bypass pipe 14 is connected in parallel with the air heat exchanger, and its other end is connected to the air inlet of the explosion-proof mixing system. This allows air passing through the fresh air duct 13 to directly enter the explosion-proof mixing system through the bypass pipe 14, avoiding the problem of excessively high temperatures within the system. Solenoid valves 5 and 6 are respectively installed on the bypass pipe 15 and the air pipe 15 to independently control their opening and closing. When the temperature in the explosion-proof mixed air system is higher than 200℃, the fresh air is not drawn through the air heat exchanger. Solenoid valve 6 is closed, air pipe 15 is cut off, solenoid valve 5 is opened, and bypass pipe 14 is opened, directly supplying air to the explosion-proof mixed air system.

[0045] In this technical solution, a nitrogen inlet pipe is connected to the electric arc vaporization system, and a sprinkler system is connected to the explosion-proof mixing system to cool the exterior of the system. When the temperature control measures (taking fresh air without passing through an air heat exchanger) within the explosion-proof mixing system fail and the temperature inside the system cannot be effectively reduced, the sprinkler system activates to cool the exterior of the system. When the gas temperature inside the explosion-proof mixing system falls below a set value, the fire sprinkler system automatically shuts off.

[0046] In this technical solution, the exhaust gas treatment system includes, in sequence, an SCR denitrification system, a high-temperature bag filter, an alkaline scrubbing tower, a water scrubbing tower, a centrifugal fan, and a high-altitude exhaust chimney. The exhaust gas discharged from the regenerative oxidizer is cooled by a heat transfer oil heat exchanger and an air heat exchanger before being directly discharged into the SCR denitrification system. The exhaust gas (containing carbon dioxide, nitrogen, water vapor, and trace amounts of nitrogen oxides) first enters the SCR denitrification system to remove nitrogen oxides, then enters the high-temperature bag filter to remove fine particulate matter. After dust removal, the gas enters the alkaline scrubbing tower and the water scrubbing tower to absorb any trace amounts of acidic gases such as sulfur dioxide that may be present in the gas. Finally, the flue gas is discharged into the high-altitude exhaust chimney by a centrifugal fan, completing the entire purification process.

[0047] This invention provides an energy-saving system for purifying volatile organic waste gas generated during the heat treatment of negative electrode materials. It effectively solves the problem of asphalt and particulate matter depositing in the collection pipes of the organic waste gas, eliminates the generation of hazardous waste, and rationally utilizes the heat of the combustible gas itself to maintain the oxidation temperature of the waste gas, reducing the cost of auxiliary fuel. Based on an annual production capacity of 50,000 tons, this system can reduce the annual cost of hazardous waste treatment, manual salvage, and auxiliary fuel for production enterprises by more than 6 million yuan.

[0048] The technical solution of the present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. An energy-saving system for purifying volatile organic waste gas from the heat treatment of negative electrode materials, characterized in that, It includes a settling buffer that connects the air inlet to the organic waste gas conveying pipe and settles easily settled substances in the organic waste gas; an explosion-proof mixing system that connects to the air outlet of the settling buffer and mixes the organic waste gas with air; a regenerative oxidizer that connects to the air outlet of the explosion-proof mixing system and oxidizes the organic waste gas; and a tail gas treatment system that connects to the air outlet of the regenerative oxidizer and purifies the tail gas discharged from the regenerative oxidizer. The settling buffer is equipped with a slag discharge port, which is connected to an electric arc gasification system. The outlet of the electric arc gasification system is connected to a cyclone separator. The settling material settled by the settling buffer enters the electric arc gasification system through the slag discharge port and is gasified. Finally, it enters the cyclone separator to separate carbon black particles. The gasified gas enters the explosion-proof mixing system through the outlet of the cyclone separator.

2. The energy-saving negative electrode material heat treatment volatile organic waste gas purification system according to claim 1, characterized in that, The gas outlet of the regenerative oxidizer is connected to a first gas guide pipe and a second gas guide pipe. The other ends of the first gas guide pipe and the second gas guide pipe are respectively connected to a heat transfer oil heat exchanger and an air heat exchanger. The exhaust gas after being cooled by the heat transfer oil heat exchanger and the air heat exchanger enters the exhaust gas treatment system.

3. The energy-saving negative electrode material heat treatment volatile organic waste gas purification system according to claim 2, characterized in that, The bottom of the settling buffer is equipped with a heating coil for heating the settling material, and the two ends of the heating coil are respectively connected to the two oil ports of the heat transfer oil heat exchanger.

4. The energy-saving negative electrode material heat treatment volatile organic waste gas purification system according to claim 2, characterized in that, The air heat exchanger includes a first air inlet, a second air inlet, a third air inlet, and a fourth air inlet. The first and second air inlets are connected and respectively connected to a second air duct and an exhaust gas treatment system. The third and fourth air inlets are connected, with the third air inlet connected to the air inlet of the explosion-proof mixing system and the fourth air inlet connected to a fresh air duct that draws in external air.

5. The energy-saving negative electrode material heat treatment volatile organic waste gas purification system according to claim 4, characterized in that, The fresh air duct is equipped with a proportional valve, which is controlled by a pressure signal from the explosion-proof mixing system and supplies fresh air to the explosion-proof mixing system as needed.

6. The energy-saving negative electrode material heat treatment volatile organic waste gas purification system according to claim 5, characterized in that, The fresh air duct is also connected to a first pneumatic valve and a second pneumatic valve. Both the first and second pneumatic valves are connected in parallel with the proportional valve. The opening and closing of both the first and second pneumatic valves are controlled by the gas concentration signal in the explosion-proof mixing system. Two combustible gas alarms are installed in the explosion-proof mixing system, and the two combustible gas alarms obtain the gas concentration in the explosion-proof mixing system.

7. The energy-saving negative electrode material heat treatment volatile organic waste gas purification system according to claim 5, characterized in that, The fresh air duct is connected to the air heat exchanger via a tee to a bypass pipe. The bypass pipe is connected in parallel with the air heat exchanger and its other end is connected to the air inlet of the explosion-proof mixing system.

8. The energy-saving negative electrode material heat treatment volatile organic waste gas purification system according to claim 1, characterized in that, The organic waste gas conveying pipe is equipped with an organic gas inlet regulating valve for adjusting the pressure of the organic waste gas entering the settling buffer.

9. The energy-saving negative electrode material heat treatment volatile organic waste gas purification system according to claim 1, characterized in that, The electric arc vaporization system is connected to a nitrogen inlet pipe, and the explosion-proof mixing system is connected to a spray device for cooling the exterior of the explosion-proof mixing system.

10. The energy-saving negative electrode material heat treatment volatile organic waste gas purification system according to claim 1, characterized in that, The exhaust gas treatment system includes an SCR denitrification system, a high-temperature bag filter, an alkaline scrubbing tower, a water scrubbing tower, a centrifugal fan, and a high-altitude exhaust chimney arranged in sequence; the exhaust gas discharged from the regenerative oxidizer is cooled by a heat transfer oil heat exchanger and the air heat exchanger before being directly discharged into the SCR denitrification system.

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