Integrated apparatus and method for hazardous waste resource plasma processing

Abstract

The application belongs to the technical field of hazardous waste treatment, and specifically discloses a hazardous waste resourceization plasma processing integrated device and method, which comprises a feeding system, a plasma furnace, a plasma torch system, an air combustion-supporting system, a secondary processing chamber and a gas processing system. The plasma torch system comprises a first plasma torch installed in the plasma furnace and a second plasma torch installed in the secondary processing chamber. The outlet of the plasma furnace is connected with a first flue and a second flue. The first flue is connected with the air combustion-supporting system, and the air combustion-supporting system and the second flue are both connected with the secondary processing chamber. The secondary processing chamber is connected with the gas processing system. The plasma furnace and the gas processing system are connected with a third flue. The third flue is connected with the gas processing system. A cut-off valve is installed on each of the first flue, the second flue and the third flue. The application can flexibly adopt different processing strategies according to different forms of hazardous waste on the same integrated device.

Description

Technical Field

[0001] This invention relates to the field of hazardous waste treatment technology, specifically to an integrated device and method for the resource recovery of hazardous waste using plasma treatment. Background Technology

[0002] Hazardous waste (such as medical waste, fly ash, liquid organic waste, and mixed industrial waste) possesses hazardous characteristics such as toxicity, corrosivity, flammability, reactivity, or infectivity. Improper handling can pose a serious threat to the ecological environment and public health. Currently, the mainstream treatment methods for hazardous waste include incineration, landfill, chemical stabilization, and solidification / stabilization. Incineration is widely used, but it suffers from problems such as low combustion temperatures, the generation of toxic byproducts like dioxins and furans, complex exhaust gas purification systems, and the need for further treatment of residues. Landfilling consumes land resources and poses a risk of leachate contamination of groundwater, making resource utilization difficult.

[0003] In recent years, plasma gasification pyrolysis technology has been gradually introduced into the field of hazardous waste treatment due to its characteristics of high temperature, high energy density, and fast reaction speed. This technology can completely pyrolyze organic matter into small-molecule combustible gases (such as H2, CO, CH4, etc.) at high temperatures, while inorganic matter melts to form a glassy residue, and heavy metals are effectively encapsulated and solidified, significantly reducing the risk of secondary pollution. However, existing plasma treatment systems are mostly fixed devices, with large equipment size, high investment, and long construction periods, making it difficult to achieve rapid response and on-site disposal. During the transportation of hazardous waste from its source to the treatment center, there are safety hazards such as leakage, diffusion, and cross-contamination, making it particularly suitable for public health emergencies, remote areas, or emergency response scenarios.

[0004] Furthermore, existing plasma treatment systems still have shortcomings in terms of process integration, modularity, exhaust gas purification efficiency, and product resource utilization. For example, exhaust gas treatment systems typically employ multi-stage independent equipment, resulting in large floor space, high energy consumption, and the generation of secondary waste (such as waste alkali and waste catalysts). Different forms of hazardous waste (solid, liquid, and fly ash) require different feeding and treatment strategies, which existing systems struggle to adapt flexibly. Some systems also rely on a single method for utilizing syngas, failing to fully realize the resource recovery of energy and materials. Summary of the Invention

[0005] This invention provides an integrated plasma treatment device for the resource recovery of hazardous waste, which aims to enable the flexible adoption of different treatment strategies based on the different forms of hazardous waste on the same integrated device.

[0006] This invention is achieved through the following technical solution: An integrated plasma treatment device for the resource recovery of hazardous waste, comprising a feeding system, a plasma furnace, a plasma torch system, an air combustion system, a secondary treatment chamber, and a gas treatment system;

[0007] The feeding system provides hazardous waste to the plasma furnace, and the plasma torch system includes a first plasma torch installed inside the plasma furnace and a second plasma torch installed inside the secondary treatment chamber.

[0008] The plasma furnace has a first flue and a second flue at its outlet. The first flue is connected to the air-assisted combustion system. Both the air-assisted combustion system and the second flue are connected to the secondary processing chamber. The secondary processing chamber is connected to the gas processing system.

[0009] A third flue connects the plasma furnace and the gas processing system; the third flue is connected to the gas processing system.

[0010] Shut-off valves are installed on the first, second, and third flues.

[0011] Compared with existing technologies, this solution has the following advantages and beneficial effects:

[0012] This solution involves setting up a first, second, and third flue at the plasma furnace outlet, and installing shut-off valves on each flue. This allows for flexible adoption of different treatment strategies based on the different forms of hazardous waste within the same integrated device. In other words, the system can flexibly switch flue gas paths according to the type of hazardous waste and the treatment objectives (such as generating syngas, power generation, or harmless emissions).

[0013] When it is necessary to recover syngas, the first and third flues can be closed, the second flue can be opened, and the syngas generated by the plasma furnace can be sent into the secondary treatment chamber for treatment, and then sent into the gas treatment system for purification and collection.

[0014] When it is necessary to perform secondary combustion of gas to utilize thermal energy, the first flue can be opened, the second and third flues can be closed, the flue gas can be introduced into the secondary treatment chamber for supplementary combustion, and then enter the gas treatment system for exhaust.

[0015] When the amount of gas produced is small and secondary combustion is not required, the third flue can be opened and the first and second flues can be closed, so that the gas produced by the plasma furnace can be directly sent to the gas treatment system for purification and exhaust.

[0016] This solution enables seamless switching between "resource recovery" and "energy utilization" modes, significantly improving the adaptability and economy of the equipment. When treating hazardous waste, the plasma torch power at different locations can be flexibly adjusted according to the demand for products, the actual amount of hazardous waste to be processed, and the physical state of the hazardous waste. Structurally, it allows for flexible switching and connection of various channels to complete process route conversion, obtaining reusable combustible syngas or pollution-free clean exhaust gas.

[0017] Furthermore, the gas treatment system includes an ammonia spraying tower, a dust and nitrogen filter cartridge, an alkaline spraying tower, a cooler, a gas storage tank, an adsorption unit, and a main induced draft fan;

[0018] The secondary treatment chamber and the third flue are both connected to the ammonia injection tower. A first connecting pipe connects the ammonia injection tower to the dust and nitrogen filter cartridge, and a second connecting pipe connects the dust and nitrogen filter cartridge to the alkaline spray tower. A third connecting pipe connects the ammonia injection tower to the alkaline spray tower. A fourth connecting pipe and a fifth connecting pipe connect the alkaline spray tower to the adsorption unit and the cooler, respectively. A sixth connecting pipe connects the adsorption unit and the cooler. The cooler is connected to the main induced draft fan and the gas storage tank through an exhaust pipe and a collection pipe, respectively.

[0019] A shut-off valve is installed on the first connecting pipe, the third connecting pipe, the fourth connecting pipe, and the fifth connecting pipe;

[0020] The ammonia injection tower, alkaline spray tower, adsorption unit, cooler, and main induced draft fan constitute the flue gas purification unit; the ammonia injection tower, dust and nitrogen filter cartridge, alkaline spray tower, cooler, and gas storage tank constitute the syngas separation unit.

[0021] The third flue is connected to the flue gas purification unit, and the secondary treatment chamber is connected to both the flue gas purification unit and the syngas separation unit.

[0022] In this scheme, by installing shut-off valves on the first, third, fourth, and fifth connecting pipes, the system can reconfigure the gas flow direction according to process requirements:

[0023] Syngas recovery mode: After preliminary treatment in the ammonia injection tower, the gas enters the dust and nitrogen filter cartridge through the first connecting pipe, then enters the alkaline spray tower through the second connecting pipe, and subsequently enters the cooler through the fifth connecting pipe, finally being collected in the gas storage tank. This path is specifically designed for the deep purification and separation of syngas, ensuring that the purity of the produced combustible gas meets the standards.

[0024] Flue gas purification and emission mode: The gas bypasses the ammonia injection tower and flows directly to the alkaline spray tower through the third connecting pipe, skipping the dust and nitrogen filter cartridge. It then enters the adsorption unit through the fourth connecting pipe, and then enters the cooler through the sixth connecting pipe. Finally, it is discharged by the main induced draft fan. This path simplifies the treatment process and is suitable for scenarios where there is no need to recover syngas and only harmless emission is required.

[0025] This solution utilizes pipeline design to allow the ammonia injection tower, alkali spray tower, and cooler to be shared between the "flue gas purification" and "syngas recovery" units.

[0026] When treating low-value or difficult-to-recover flue gas, deacidification and fine filtration are completed using an alkaline spray tower and an adsorption unit.

[0027] When processing high-value syngas, a dust-filter cartridge is used for denitrification and dust removal, followed by condensation and dehydration via a cooler before final storage in a tank. High-value toner can also be separated and retained at the dust-filter cartridge. This reusable design significantly reduces the number of devices and floor space required, lowering manufacturing costs, and is particularly suitable for space-constrained vehicle-mounted integrated systems.

[0028] In addition, the third flue gas in this scheme (directly generated gas from the plasma furnace) can directly enter the "flue gas purification unit" and achieve rapid and harmless emission without the need for secondary combustion.

[0029] Secondary treatment chamber gas (gas after reforming or reburning): can be selected to enter the flue gas purification unit for conventional emission, or enter the syngas separation unit for resource recovery.

[0030] This source-specific processing capability allows the system to flexibly handle gases with different compositions, avoiding poor processing results due to fluctuations in the gas source.

[0031] Furthermore, a check valve is installed on the second connecting pipe.

[0032] In this design, the check valve prevents gas backflow caused by a momentary increase in downstream pressure compared to upstream pressure. In syngas recovery mode, the gas enters the alkaline spray tower after passing through the dust and nitrogen filter cartridge for dust removal and denitrification. If the pressure on the alkaline spray tower side fluctuates (e.g., due to the start-up and shutdown of the spray pump), the check valve can close quickly to prevent gas backflow into the dust and nitrogen filter cartridge, maintain unidirectional airflow, ensure stable system pressure, and prevent process disturbances.

[0033] Furthermore, the feeding system includes a waste lifting unit, a waste mixing unit, a waste feeding pipe, and a feeding port;

[0034] The waste lifting unit is connected to the plasma furnace through the waste feeding pipe; the waste mixing unit and the feed inlet are both located on the plasma furnace; the waste mixing unit is used to add additives for mixing and treating hazardous waste into the plasma furnace; the feed inlet is used to inject liquid hazardous waste into the plasma furnace; and the bottom of the plasma furnace is provided with a discharge port.

[0035] In this solution, solid, semi-solid, or bagged hazardous waste can be automatically lifted and transported into the plasma furnace through the cooperation of the waste lifting unit and the waste feeding pipe.

[0036] Liquid hazardous waste can be directly injected into the plasma furnace through an independent feed port set on the plasma furnace using compressed gas assistance.

[0037] The waste blending unit is directly installed on the plasma furnace. According to the composition of the hazardous waste, additives (such as glass frit, limestone, flux, etc.) can be added to the furnace in proportion during the feeding or processing process. For example, for fly ash waste, blending glass frit can effectively reduce the melting temperature, improve the slag quality, and avoid coking in the furnace or blockage at the discharge point.

[0038] In this solution, the same plasma furnace can accommodate the feeding requirements of various forms of waste, including solid, semi-solid, liquid, and fly ash, without the need to replace equipment, thus significantly improving the adaptability and versatility of the device.

[0039] Furthermore, the air-assisted combustion system includes a blower, a buffer box, an air supply duct, and an air inlet pipe; the plasma furnace and the buffer box are connected through the first flue, and the blower and the buffer box are connected through the air supply duct; the buffer box and the secondary processing chamber are connected through the air inlet pipe.

[0040] In this scheme, the buffer box acts as an airflow buffer device, which can eliminate the pulsating fluctuations of the airflow output by the blower and provide continuous and stable combustion air for the secondary processing chamber. The buffer box also receives flue gas from the plasma furnace and air from the blower, playing a dual role of gas-gas mixing and pressure balance, thus avoiding unstable combustion or flame backflow in the secondary processing chamber due to air pressure fluctuations.

[0041] In addition, the first flue directly introduces the high-temperature flue gas generated by the plasma furnace into the buffer box, rather than directly discharging or simply cooling it; the high-temperature flue gas mixes and exchanges heat with the combustion air blown in by the blower in the buffer box, using the waste heat of the flue gas to preheat the combustion air; the preheated combustion air enters the secondary treatment chamber through the air inlet pipe, which significantly improves the thermal efficiency of secondary combustion and reduces the energy consumption of supplementary fuel or plasma torch.

[0042] Furthermore, both the first and second flues are equipped with gas monitoring units, which are used to determine the calorific value ratio of the combustible gas.

[0043] The gas monitoring unit detects the calorific value ratio of combustible gases (such as the concentration or calorific value of combustible components like H2, CO, and CH4) in the first and second flues in real time and feeds the monitoring signal back to the system controller.

[0044] When the calorific value of combustible gas is detected to be higher than the set threshold, the system can automatically switch to syngas recovery mode, close the corresponding flue shut-off valve, and introduce high-value syngas into the gas treatment system for purification and collection.

[0045] When the calorific value of combustible gas is detected to be lower than the set threshold, the system can switch to secondary combustion mode or direct emission mode to avoid energy waste caused by the recovery of low-calorific-value gas. This solution can realize intelligent process decision-making based on real-time gas composition and improve the automation level of system operation.

[0046] Furthermore, it also includes a vehicle-mounted container and a processing vehicle. The feeding system, plasma furnace, plasma torch system, air combustion system, secondary processing chamber, and gas processing system are integrated into the vehicle-mounted container, which is installed on the processing vehicle.

[0047] Each functional unit (feeding, plasma treatment, gas purification, auxiliary systems, etc.) is compactly arranged in a standard vehicle-mounted container after being miniaturized and modularized. The treatment vehicle can carry the vehicle-mounted container directly to the hazardous waste generation site (such as medical institutions, chemical plants, and the site of sudden pollution incidents) to achieve on-site and immediate treatment of hazardous waste. This avoids the secondary pollution risks such as leakage, diffusion, and cross-infection caused by the need for long-distance transportation of hazardous waste to a fixed treatment center in traditional treatment modes. It is especially suitable for emergency scenarios such as remote areas, areas with inconvenient transportation, or sudden public health events.

[0048] Furthermore, the processing vehicle is also equipped with a main electrical box and a main water tank, and the main electrical box and the main water tank are respectively provided with an external power supply interface and an external water source interface.

[0049] Once the treatment vehicle arrives at the work site, simply plug the external power cord into the external power interface and connect the external water pipe to the external water interface to complete the energy and medium supply connection; there is no need for complex electrical wiring or water pipe laying on site, which significantly shortens the time from equipment arrival to start-up and improves emergency response efficiency.

[0050] Furthermore, the processing vehicle is also equipped with a gas source and a chiller. The chiller provides coolant to the plasma torch system, and the gas source provides working gas to the plasma torch system.

[0051] In this solution, the gas generator can produce the working gas required for the plasma torch (such as nitrogen, argon, carbon dioxide, water vapor, etc.) on site, without the need for external high-pressure gas cylinders or on-site gas supply facilities.

[0052] The chiller provides circulating coolant (such as deionized water or coolant) for the plasma torch system, eliminating the need for external large cooling towers or reliance on on-site water supply; enabling the treatment vehicle to start and operate normally in remote areas or emergency sites where industrial gas supply or cooling water conditions are lacking.

[0053] In this solution, the chiller continuously provides forced cooling to the plasma torch electrodes and coils through a circulating cooling system, effectively removing the heat generated during high-temperature operation and preventing the electrodes from overheating and burning or the insulation from failing.

[0054] Stable coolant flow and temperature control ensure that the plasma torch maintains normal operating temperature under high power conditions, extending the torch's service life; the gas source provides continuous, stable, and adjustable pressure working gas, ensuring the stable generation and maintenance of the plasma torch arc, and avoiding arc extinction or fluctuation caused by gas pressure fluctuations.

[0055] A method for the plasma treatment of hazardous waste for resource recovery, using an integrated plasma treatment device for hazardous waste resource recovery as described above, includes the following steps:

[0056] Hazardous waste is fed into the plasma furnace through a feeding system;

[0057] When the hazardous waste is fly ash, the shut-off valves on the first and second flues are closed, the shut-off valve on the third flue is opened, additives are added to the plasma furnace and the fly ash is melted in the plasma furnace. The flue gas generated in the plasma furnace enters the gas treatment system through the third flue and is purified and discharged through the flue gas purification unit.

[0058] When the hazardous waste is liquid hazardous waste, the shut-off valves on the second and third flues are closed, the shut-off valve on the first flue is opened, and the air combustion system is started. The combustible gas generated by the reaction of the liquid hazardous waste in the plasma furnace enters the secondary treatment chamber through the first flue for supplementary combustion and then enters the gas treatment system, and is purified and discharged through the flue gas purification unit.

[0059] When the hazardous waste is mixed hazardous waste, the shut-off valves on the first and third flues are closed, and the shut-off valve on the second flue is opened. The mixed hazardous waste is melted in the plasma furnace. The flue gas generated in the plasma furnace enters the secondary treatment chamber through the second flue for supplementary combustion or plasma pyrolysis gasification reaction. The generated gas then enters the gas treatment system and is purified and collected by the syngas separation unit.

[0060] In this method, the same integrated device can flexibly switch treatment paths according to the form of hazardous waste (fly ash, liquid, and mixed) without replacing equipment. The goal for fly ash waste is harmless discharge; the goal for liquid waste is thermal energy utilization; and the goal for mixed waste is syngas resource recovery. This method directly purifies and discharges low-value flue gas, saving combustion energy consumption; and separates and collects high-value syngas, improving resource recovery benefits.

[0061] In all treatment modes, the exhaust gas undergoes a comprehensive purification system (denitrification, dust removal, acid removal, and demisting) to ensure compliance with emission standards. Mode switching is achieved by controlling the opening and closing of the shut-off valves on the three flues, making it simple to operate and suitable for vehicle-mounted mobile emergency response scenarios. Attached Figure Description

[0062] The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0063] Figure 1 This is a schematic diagram of the gas path state when treating fly ash waste in an embodiment of the integrated plasma treatment device for hazardous waste resource recovery according to the present invention.

[0064] Figure 2 This is a schematic diagram of the gas path during the treatment of liquid hazardous waste in an embodiment of the integrated plasma treatment device for hazardous waste resource recovery according to the present invention.

[0065] Figure 3 This is a schematic diagram of the gas path state when processing mixed hazardous waste in an embodiment of the integrated plasma treatment device for hazardous waste resource recovery according to the present invention;

[0066] Figure 4 This is a schematic diagram of another path state of gas when treating fly ash waste in an embodiment of the integrated plasma treatment device for hazardous waste resource recovery according to the present invention.

[0067] Figure 5 This is a flowchart of a plasma treatment method for the resource recovery of hazardous waste according to the present invention.

[0068] The attached diagram shows the markings and corresponding component names:

[0069] 1. First plasma torch 2. Second plasma torch 3. Plasma furnace 4. Secondary treatment chamber 5. Blower 6. Ammonia spraying tower 7. Dust and nitrogen filter cartridge 8. Alkali spraying tower 9. Cooler 10. Gas storage tank 11. Adsorption unit 12. Main induced draft fan 13. Nitrogen generator 14. Chiller 15. Waste lifting unit 16. Waste matching unit 17. Waste feed pipe 18. Discharge port 19. Ash silo 20. Check valve 21. Shut-off valve 22. Buffer tank 23. First flue 24. Second flue 25. Third flue 26. Air supply pipe 27. Inlet pipe 28. Outlet pipe 29. First connecting pipe 30. Second connecting pipe 31. Third connecting pipe 32. Fourth connecting pipe 33. Fifth connecting pipe 34. Sixth connecting pipe 35. Exhaust pipe 36. Collection pipe Detailed Implementation

[0070] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention.

[0071] As one embodiment of this application, such as Figure 1 As shown, this embodiment provides an integrated plasma treatment device for the resource recovery of hazardous waste, including a feeding system, a plasma furnace 3, a plasma torch system, an air combustion system, a secondary treatment chamber 4, and a gas treatment system;

[0072] The feeding system provides hazardous waste to the plasma furnace 3. The plasma torch system includes a first plasma torch 1 installed in the plasma furnace 3 and a second plasma torch 2 installed in the secondary treatment chamber 4. In this embodiment, the secondary treatment chamber 4 is a secondary combustion chamber or a reforming chamber.

[0073] The plasma furnace 3 has a first flue 23 and a second flue 24 connected to its outlet. The first flue 23 is connected to an air-assisted combustion system. Both the air-assisted combustion system and the second flue 24 are connected to a secondary processing chamber 4. The secondary processing chamber 4 is connected to a gas processing system. The air-assisted combustion system provides oxygen for the combustion of gas in the secondary processing chamber 4.

[0074] A third flue 25 connects the plasma furnace 3 to the gas processing system; the third flue 25 is connected to the gas processing system.

[0075] Shut-off valves 21 are installed on the first flue 23, the second flue 24, and the third flue 25.

[0076] In one embodiment, such as Figure 1 As shown, the feeding system includes a waste lifting unit 15, a waste matching unit 16, a waste feeding pipe 17, and a feeding port;

[0077] Waste lifting unit 15 is connected to plasma furnace 3 via waste feed pipe 17; waste mixing unit 16 and feed inlet are both located on plasma furnace 3. Waste mixing unit 16 is used to add additives for mixing and treating hazardous waste into plasma furnace 3; feed inlet is used to inject liquid hazardous waste into plasma furnace 3, and discharge port 18 is provided at the bottom of plasma furnace 3. In this embodiment, waste mixing unit 16 refers to a device or module for adding specific additives (such as glass frit, limestone, flux, etc.) to hazardous waste in proportion before or during treatment in plasma furnace 3.

[0078] In this embodiment, fly ash waste, liquid hazardous waste and mixed hazardous waste can be treated. When the hazardous waste is fly ash waste and mixed hazardous waste, the hazardous waste falls into the plasma furnace 3 through the waste feed pipe for plasma torch heat treatment. When treating fly ash waste, glass material of equal proportion is added into the plasma furnace 3 through the waste mixing unit 16, mixed with fly ash and then melted to form glass products.

[0079] When the hazardous waste is in liquid form, it is typically injected into the plasma furnace 3 through an inlet using existing nozzles with the assistance of compressed gas. The inlet is usually equipped with atomizing nozzles to atomize the liquid waste into fine droplets, increasing the contact area with the high-temperature flame of the plasma torch. The atomized droplets are rapidly heated, evaporated, and pyrolyzed within the furnace, improving processing efficiency and reaction uniformity. The inlet can be connected to a liquid waste storage tank, a transfer pump, and compressed gas pipelines to achieve continuous, quantitative, and stable injection of liquid waste, meeting the needs of continuous industrial processing.

[0080] The feed inlet, waste lifting unit 15, and waste matching unit 16 are arranged side by side to form a feeding system, which can select different feeding methods according to different types of hazardous waste. In this embodiment, by switching the shut-off valves 21 on different flues, three modes can be switched: a direct purification and emission mode for fly ash waste (low gas production, low calorific value), which produces glass products and harmless clean exhaust gas; a secondary combustion heat energy utilization mode for liquid hazardous waste (high gas production, certain calorific value), which recovers heat energy and cleans exhaust gas; and a syngas resource recovery mode for mixed hazardous waste (high organic content, high calorific value), which recovers combustible syngas and carbon powder.

[0081] In one embodiment, such as Figure 1 As shown, in this embodiment, the air-assisted combustion system includes a blower 5, a buffer tank 22, an air supply duct 26, and an air inlet pipe 27. The plasma furnace 3 and the buffer tank 22 are connected via a first flue 23, and the blower 5 and the buffer tank 22 are connected via the air supply duct 26. The buffer tank 22 and the secondary treatment chamber 4 are connected via the air inlet pipe 27. After the hazardous waste is pyrolyzed and gasified in the plasma furnace 3, the resulting combustible gases (such as H2, CO, CH4, etc.) enter the secondary treatment chamber 4, requiring the addition of oxygen for complete combustion. The air-assisted combustion system uses the blower 5 to pump outside air into the buffer tank 22, and then sends it into the secondary treatment chamber 4 via the air inlet pipe 27, providing sufficient oxygen for secondary combustion.

[0082] The high-temperature flue gas (reaching temperatures above 1000℃) generated by the plasma furnace 3 enters the buffer tank 22 through the first flue 23, where it mixes and exchanges heat with the cold air blown in by the blower 5. The combustion air is preheated by the high-temperature flue gas before entering the secondary treatment chamber 4, significantly improving the flame temperature and combustion stability of the secondary combustion. This waste heat recovery design reduces the external energy input required for secondary combustion (such as the power of the second plasma torch 2), achieving energy saving and consumption reduction. Furthermore, the preheated combustion air and combustible gas are fully mixed and combusted in the secondary treatment chamber 4, ensuring a combustion temperature above 1100℃ and a residence time greater than 2 seconds. This condition can effectively decompose persistent organic pollutants such as dioxins and furans, preventing toxic and harmful substances from being emitted with the exhaust gas.

[0083] The air-assisted combustion system is linked to the shut-off valve 21 on the first flue 23 for control: when secondary combustion is required (such as in the liquid hazardous waste treatment mode), the shut-off valve 21 on the first flue 23 is opened, and the high-temperature flue gas enters the buffer box 22 to preheat the air, while the blower 5 starts to supply air.

[0084] When secondary combustion is not required (such as in the mixed hazardous waste treatment mode or fly ash waste treatment mode), the first flue 23 shut-off valve 21 is closed or the blower 5 is stopped, and the air-assisted combustion system does not participate in the operation. This controllable design allows the system to flexibly switch between waste heat utilization and secondary combustion and syngas recovery modes.

[0085] In one embodiment, gas monitoring units are installed on both the first flue 23 and the second flue 24. The gas monitoring units are used to determine the calorific value ratio of combustible gas. When the calorific value of combustible gas is detected to be higher than a set threshold, the system automatically switches to syngas recovery mode (opens the second flue 24) to introduce high-value syngas into the gas treatment system for purification and collection.

[0086] When the calorific value of combustible gas is detected to be lower than the set threshold, the system automatically switches to secondary combustion mode (opening the first flue 23) or direct emission mode (opening the third flue 25) to avoid energy waste caused by the recovery of low-calorific-value gas.

[0087] When the gas enters the secondary treatment chamber 4 for supplementary combustion, the calorific value data provided by the gas monitoring unit is used to adjust the supply of combustion air (by adjusting the airflow through the blower 5) and the power of the second plasma torch 2. This ensures that the air-fuel ratio is within the optimal range, allowing the combustible gas to burn completely, maintaining a stable combustion temperature above 1100℃ and a residence time greater than 2 seconds, effectively cracking harmful substances such as dioxins. In traditional processes, whether syngas recovery or secondary combustion is needed often relies on the operator's experience and judgment. This invention, through the automatic detection and judgment of the gas monitoring unit, reduces the need for human intervention, enabling non-professionals to operate the integrated treatment device safely and efficiently.

[0088] The gas monitoring unit in this embodiment is an integrated detection device installed on the first flue 23 and the second flue 24. It mainly consists of a sampling pretreatment unit, a gas analyzer (such as an infrared or gas chromatography module), flue gas parameter sensors (temperature, pressure, flow rate), and a data control unit. Its core function is to monitor the component concentration (such as H2, CO, CH4) of the combustible gas produced by the plasma furnace 3 in real time and calculate the calorific value ratio. The signal is fed back to the system controller, which automatically determines whether to open the second flue 24 for syngas recovery, open the first flue 23 for secondary combustion, or open the third flue 25 for direct emission, thereby realizing intelligent switching of the processing mode and optimized adjustment of the combustion air volume.

[0089] In one embodiment, such as Figure 1 As shown, in this embodiment, the gas treatment system includes an ammonia spraying tower 6, a dust and nitrogen filter cartridge 7, an alkaline spraying tower 8, a cooler 9, a gas storage tank 10, an adsorption unit 11, and a main induced draft fan 12.

[0090] The secondary treatment chamber 4 and the third flue 25 are both connected to the ammonia injection tower 6. In this embodiment, an outlet pipe 28 connects the secondary treatment chamber 4 and the ammonia injection tower 6. A first connecting pipe 29 connects the ammonia injection tower 6 and the dust and nitrate filter cartridge 7. A second connecting pipe 30 connects the dust and nitrate filter cartridge 7 and the alkaline spray tower 8. In this embodiment, two ash hoppers 19 are provided at the bottom of the dust and nitrate filter cartridge 7. A third connecting pipe 31 connects the ammonia injection tower 6 and the spray tower. The alkaline spray tower 8 is connected to the adsorption unit 11 and the cooler 9 respectively. A fourth connecting pipe 32 and a fifth connecting pipe 33 are provided; a sixth connecting pipe 34 connects the adsorption unit 11 and the cooler 9. In this embodiment, the adsorption unit 11 refers to an adsorption filtration device filled with activated carbon or activated carbon fiber, which is usually a box-type structure; the cooler 9 is connected to the main induced draft fan 12 and the gas storage tank 10 through the exhaust pipe 35 and the collection pipe 36, respectively; a shut-off valve 21 is installed on the first connecting pipe 29, the third connecting pipe 31, the fourth connecting pipe 32, and the fifth connecting pipe 33.

[0091] The ammonia injection tower 6, the alkaline spray tower 8, the adsorption unit 11, the cooler 9, and the main induced draft fan 12 constitute the flue gas purification unit; the ammonia injection tower 6, the dust and nitrogen filter cartridge 7, the alkaline spray tower 8, the cooler 9, and the gas storage tank 10 constitute the syngas separation unit; the third flue duct 25 is connected to the flue gas purification unit, and the secondary treatment chamber 4 is connected to both the flue gas purification unit and the syngas separation unit.

[0092] In this embodiment, the ammonia injection tower 6 injects ammonia water or urea solution into the flue gas to provide a reducing agent for the subsequent denitrification reaction; the ammonia gas produced by the decomposition of ammonia water or urea solution mixes with the nitrogen oxides (NOx) in the flue gas to carry out a partial non-selective denitrification reaction and prepare for the selective catalytic denitrification in the dust and nitrification filter cartridge 7; the dust and nitrification filter cartridge 7 is a composite unit integrating denitrification and dust removal functions, and its interior is lined with a denitrification catalyst so that NOx reacts with ammonia gas to generate harmless N2 and H2O; it uses ceramic or metal filter cartridges to intercept particulate matter (dust, carbon black, etc.) in the flue gas, and the bottom ash bin 19 is used to collect ash powder and high-value carbon powder in the flue gas.

[0093] The alkaline spray tower 8 performs wet deacidification of flue gas by spraying alkaline solutions (such as NaOH solution), absorbing acidic gases (such as HCl, SO2, HF, etc.) in the flue gas, and at the same time, it also has a cooling effect.

[0094] Cooler 9 uses indirect heat exchange (such as gas-liquid heat exchanger) to further reduce flue gas temperature and condense and remove saturated water vapor from the flue gas to prevent corrosion of subsequent pipelines and equipment; in practice, the condensate can be returned to the main water tank for distribution and recycling.

[0095] In the syngas recovery mode, the gas storage tank 10 serves as a container for collecting syngas and storing purified combustible syngas (H2, CO, etc.) for subsequent resource utilization (such as power generation, heating, or chemical raw materials).

[0096] The adsorption unit 11 serves as a terminal fine purification device, filled with adsorption materials such as activated carbon to adsorb trace organic pollutants (such as dioxins, furans, and VOCs) and odor substances remaining in the flue gas, ensuring that the exhaust gas meets emission standards.

[0097] The main exhaust fan 12 provides negative pressure power for the entire system, maintains a slightly negative pressure state inside the system, and prevents harmful gases from leaking out; at the same time, it leads out the treated exhaust gas that meets the standards and discharges it safely.

[0098] In one embodiment, such as Figure 1 As shown, in this embodiment, a check valve 20 is installed on the second connecting pipe 30 to prevent gas backflow and ensure that gas can only flow from the dust and nitrate filter cartridge 7 to the alkaline spray tower 8, thereby protecting the upstream dust and nitrate filter cartridge 7 from damage.

[0099] In one embodiment, an integrated plasma treatment device for hazardous waste resource recovery further includes a vehicle-mounted container and a treatment vehicle. The feeding system, plasma furnace 3, plasma torch system, air combustion system, secondary treatment chamber 4, and gas treatment system are integrated inside the vehicle-mounted container, which is installed on the treatment vehicle.

[0100] In one embodiment, such as Figure 1As shown, the processing vehicle is also equipped with a main electrical box and a main water tank, which are respectively equipped with an external power supply interface and an external water supply interface.

[0101] The processing vehicle is also equipped with a gas generator and a chiller 14. The chiller 14 provides coolant to the plasma torch system, and the gas generator provides working gas to the plasma torch system. In this embodiment, the gas generator is fixedly installed inside one side of the processing container. In this embodiment, the gas generator is a nitrogen generator 13, and the nitrogen outlet of the gas generator is connected to the air inlet of the plasma torch system through a stainless steel high-pressure hose.

[0102] The chiller 14 is fixedly installed on the other side of the processing container. It is an air-cooled circulating chiller 14 set. The coolant outlet of the chiller 14 is connected to the coolant inlet of the plasma torch system through an insulated hose. After the coolant flows through the electrodes and coils of the plasma torch, it carries heat back to the coolant inlet of the chiller 14, forming a closed loop.

[0103] In this embodiment, the main electrical box is fixedly installed on one side of the processing vehicle chassis. It adopts a waterproof, dustproof, and shockproof sealed box structure with a protection level of not less than IP54. The main electrical box integrates a main circuit breaker, a leakage current protector, an overload protector, a surge protector, and multiple branch circuit breakers, which correspond to the electrical equipment of the plasma torch system, blower 5, induced draft fan, cooler 9, air source unit, chiller 14, and control system, respectively.

[0104] An external power interface is located on the side of the main electrical box, using an industrial-grade waterproof and explosion-proof plug and socket. This external power interface connects to the input terminal of the main circuit breaker inside the main electrical box via an armored cable. During on-site operations, operators only need to insert the power cord plug from the on-site distribution box into this external power interface and close the main circuit breaker to supply power to all equipment in the vehicle, without requiring any on-site wiring or electrical connection work.

[0105] The main water tank is fixedly installed on the other side of the processing vehicle chassis. It is welded from 304 stainless steel and contains a level gauge, an inlet filter, and an automatic water replenishment valve. The main water tank has an external water source interface at its inlet, which uses a DN25 quick connector (male / female fit). The main water tank's outlet is connected via branch pipelines to the plasma torch system's chiller 14 (providing initial filling and replenishment of cooling circulating water), alkali spray tower 8 (providing water for alkali preparation and spray replenishment), cooler 9 (providing indirect heat exchange cooling water), and gas source unit (providing cooling and humidification water for nitrogen / gas production feedstock air). Each branch pipeline is equipped with an independent ball valve and pressure gauge for regulating and monitoring the water supply and pressure of each water-using unit.

[0106] During on-site operations, operators only need to connect the on-site tap water or fire water hose to the external water source interface through a quick connector, open the tap water valve, and the main water tank will automatically replenish water to the set level, which can supply water to all water-using equipment in the vehicle without any on-site pipeline connection or welding work.

[0107] In another embodiment, such as Figure 5 As shown, this embodiment also discloses a method for the plasma treatment of hazardous waste for resource recovery, using an integrated plasma treatment device for hazardous waste resource recovery as described in the above embodiment, including the following steps:

[0108] 1. Hazardous waste is fed into plasma furnace 3 through the feeding system. The feeding method is flexibly switched according to the type of hazardous waste. Specifically:

[0109] When processing fly ash waste, an equal proportion of additives (in this embodiment, the additive is glass material) are added to the waste mixing unit 16 and mixed together. The mixture is then fed into the plasma furnace 3 and melted by the plasma torch system (here, the first plasma torch 1). The molten slag melts and enters the bottom discharge port 18, forming glass products which are then discharged.

[0110] When processing liquid hazardous waste, the liquid hazardous waste enters the plasma furnace 3 through a nozzle with the assistance of compressed gas. The temperature inside the plasma furnace 3 is controlled by adjusting the power of the first plasma torch 1, and the liquid hazardous waste undergoes a plasma pyrolysis and gasification reaction.

[0111] When processing mixed hazardous waste, the mixed hazardous waste enters the plasma furnace 3 through the waste lifting unit 15 and the waste feeding pipe 17, and the temperature inside the plasma furnace is controlled by adjusting the power of the first plasma torch 1.

[0112] 2. For example Figure 1 As shown, when the hazardous waste is fly ash, the shut-off valves 21 on the first flue 23 and the second flue 24 are closed, and the shut-off valve 21 on the third flue 25 is opened. Additives are added to the plasma furnace 3 and the fly ash is melted in the plasma furnace 3. The flue gas generated in the plasma furnace 3 enters the gas treatment system through the third flue 25 and is purified and discharged through the flue gas purification unit in the gas treatment system. Specifically: the shut-off valves 21 on the third connecting pipe 31 and the fourth connecting pipe 32 are opened, and the shut-off valves 21 on the first connecting pipe 29 and the fifth connecting pipe 33 are closed. The path of the tail gas from the third flue 25 into the gas treatment system is: third flue 25 - ammonia injection tower 6 - alkaline spray tower 8 - adsorption unit 11 - cooler 9 - main induced draft fan 12 (flue gas emission);

[0113] 3. For example Figure 2As shown, when the hazardous waste is liquid hazardous waste, the shut-off valves 21 on the second flue 24 and the third flue 25 are closed, the shut-off valve 21 on the first flue 23 is opened, and the air-assisted combustion system is started, so that the blower 5 provides oxygen for combustion in the secondary treatment chamber 4. The combustible gas generated by the reaction of the liquid hazardous waste in the plasma furnace 3 enters the secondary treatment chamber 4 through the first flue 23 under the action of negative pressure suction for supplementary combustion, and then enters the gas treatment system. In this embodiment, the blower 5 supplements the secondary treatment chamber 4 with combustion-supporting air, so that the combustible gas burns in the secondary treatment chamber 4, ensuring that the air and combustible gas are fully mixed, the combustion time is greater than 2 seconds, the combustion temperature is greater than 1100 degrees Celsius, and the gas is purified and discharged through the flue gas purification unit in the gas treatment system after complete combustion. Specifically:

[0114] Open the shut-off valves 21 on the third connecting pipe 31 and the fourth connecting pipe 32, and close the shut-off valves 21 on the first connecting pipe 29 and the fifth connecting pipe 33. The gas flowing out of the secondary treatment chamber 4 enters the gas treatment system via the following path: ammonia spray tower 6 - alkali spray tower 8 - adsorption unit 11 - cooler 9 - main induced draft fan 12. After the gas is fully combusted, it enters the two-stage treatment (ammonia spray tower 6 - alkali spray tower 8). After cooling and deacidification in this device, it enters the adsorption unit 11. After filtration and adsorption treatment, it is safely discharged. Finally, it is led out of the device by the main induced draft fan 12 to achieve flue gas emission.

[0115] 4. For example Figure 3 As shown, when the hazardous waste is mixed hazardous waste, the shut-off valves 21 on the first flue 23 and the third flue 25 are closed, and the shut-off valve 21 on the second flue 24 is opened. The mixed hazardous waste is melted in the plasma furnace 3. The temperature in the plasma furnace 3 is controlled by adjusting the power of the first plasma torch 1, and the hazardous waste undergoes plasma pyrolysis gasification reaction. The syngas generated in the plasma furnace 3 enters the secondary treatment chamber 4 from the second flue 24 under the action of negative pressure suction for supplementary combustion or plasma pyrolysis gasification reaction. The generated gas then enters the gas treatment system and is purified and collected by the syngas separation unit.

[0116] Specifically: In this embodiment, a gas monitoring unit is installed on the second flue 24 at the outlet of the plasma furnace 3 to determine the calorific value ratio of the combustible gas. Based on the output and monitoring of the combustible gas, the combustible gas can be selected to undergo supplementary combustion in the secondary treatment chamber 4 (at this time, the blower 5 is started to send oxygen into the secondary treatment chamber 4 to facilitate the combustion of the combustible gas in the secondary treatment chamber 4), and the generated gas will then enter the flue gas purification treatment unit for purification treatment; or the combustible gas can be selected to undergo secondary reforming treatment directly in the secondary treatment chamber 4, but without combustion, and the generated syngas will then enter the syngas separation unit for purification treatment.

[0117] After the syngas is cooled, purified and separated by the syngas separation unit, it enters the syngas collection device for collection. In this embodiment, the syngas collection device is a gas storage tank 10.

[0118] In this embodiment, the specific operation of the synthesis gas from the secondary treatment chamber 4 entering the synthesis gas separation unit of the gas treatment system is as follows: open the shut-off valve 21 on the first connecting pipe 29 and the fifth connecting pipe 33, and close the shut-off valve 21 on the third connecting pipe 31 and the fourth connecting pipe 32. The specific path is: ammonia spraying tower 6 - dust and nitrate filter cartridge 7 - alkaline spraying tower 8 - cooler 9 - gas storage tank 10. In this embodiment, after the combustible gas is reformed in the secondary treatment chamber 4, it enters the ammonia spraying tower 6, dust and nitrate filter cartridge 7, alkaline spraying tower 8, and cooler 9 to complete the cooling and deacidification, and is then collected by the gas storage tank 10. The carbon powder trapped in the dust and nitrate filter cartridge 7 enters the ash hopper 19 at its bottom for collection.

[0119] In another embodiment, such as Figure 4 As shown, when the hazardous waste is fly ash, the shut-off valves 21 on the first connecting pipe 29 and the fifth connecting pipe 33 can be opened, while the shut-off valves 21 on the third connecting pipe 31 and the fourth connecting pipe 32 can be closed; the fly ash trapped in the dust filter cartridge 7 enters the ash hopper 19 at its bottom for collection. At this time, the path of the exhaust gas from the third flue 25 into the gas treatment system is: third flue 25 - ammonia injection tower 6 - dust filter cartridge 7 - alkaline spray tower 8 - cooler 9 - main induced draft fan 12.

[0120] When treating hazardous waste, this invention allows for flexible adjustment of the plasma torch power at different locations based on the demand for products, the actual amount of hazardous waste to be treated, and the physical state of the hazardous waste. Structurally, it can be flexibly connected to the interface of the end-of-line gas treatment unit to complete the process route conversion and obtain reusable combustible syngas or pollution-free clean exhaust gas.

[0121] The key feature of this invention is the modular plasma furnace 3. The plasma furnace 3 has a standardized interface, allowing for the selection of different thermal plasma treatment processes for hazardous waste based on its source. Simultaneously, the gas treatment unit features a modular design, integrating denitrification and dust removal functions using a dust and nitrogen filter cartridge 7. This addresses the issue of byproducts generated by different discharge gas media, improves exhaust gas emission efficiency, and reduces the complexity of the gas purification system.

[0122] This invention relates to the thermal treatment of hazardous waste using a thermal plasma treatment system. The invention can use gases such as nitrogen, argon, or carbon dioxide as the gas source for the first plasma torch 1 and the second plasma torch 2. The first plasma torch 1 and the second plasma torch 2 are energized and discharged to generate plasma torch flames for hazardous waste treatment. During the treatment process, organic components of the waste form combustible syngas during the plasma thermal treatment. The plasma furnace 3 maintains a slightly negative pressure environment during the treatment process, and the entire system is kept under negative pressure by the main induced draft fan 12 to ensure that gaseous substances do not escape from the system.

[0123] In the first plasma torch 1 and the second plasma torch 2, under the conditions of nitrogen and oxygen in the furnace, oxygen and nitrogen react to produce thermal nitrogen oxides at the high temperature provided by the torch. These nitrogen oxides, along with the exhaust gas from the secondary treatment chamber 4, enter the downstream gas treatment system. The dust and nitrogen filter cartridge 7 installed in the gas treatment system can treat these nitrogen oxides and simultaneously collect the mixed particulate matter or carbon powder in the gas.

[0124] In the gas treatment system, indirect heat exchange is preferentially used for heat exchange and gas cooling. Once the gas temperature drops below 500℃, it can pass through the dust and nitrogen filter cartridge 7 for denitrification. The dust and nitrogen filter cartridge 7 uses high-temperature resistant material as the base filter medium and is pre-coated with a denitrification catalyst. The cooled gas undergoes further deacidification treatment. After wet deacidification in an alkaline scrubbing tower, the flue gas undergoes further cooling treatment through indirect cooling heat exchange via cooler 9, removing saturated water vapor present in the flue gas. The condensate collected in cooler 9 is returned to the main water tank and participates in the system's water circulation. The exhaust gas from this gas purification system is safely discharged through the main induced draft fan 12.

[0125] This invention aims to solve the problem of byproducts generated during plasma treatment of hazardous waste. By optimizing the gas treatment unit and increasing the composite functions of the unit equipment, the convenience of plasma thermal treatment of hazardous waste is greatly improved without generating additional secondary waste. The purified products can be selected according to actual needs. Through modular key unit process design, the process integration and optimization of thermal plasma treatment of hazardous waste is realized, and the energy of hazardous waste treatment is utilized in a resource-based manner. The generated syngas, carbon powder, or glass slag products can all be utilized in a resource-based manner.

[0126] This invention, through a unique modular design and optimized gas purification system, ensures the complete functionality and ease of use of the mobile integrated treatment vehicle. It provides an efficient solution for treating hazardous waste, saving transportation and management costs and enabling the resource utilization of hazardous waste.

[0127] It should be noted that the above description of the disclosed embodiments enables those skilled in the art to implement or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An integrated plasma treatment device for hazardous waste resource recovery, characterized in that, It includes a feeding system, plasma furnace, plasma torch system, air-assisted combustion system, secondary treatment chamber, and gas handling system; The feeding system provides hazardous waste to the plasma furnace, and the plasma torch system includes a first plasma torch installed inside the plasma furnace and a second plasma torch installed inside the secondary treatment chamber. The plasma furnace has a first flue and a second flue at its outlet. The first flue is connected to the air-assisted combustion system. Both the air-assisted combustion system and the second flue are connected to the secondary processing chamber. The secondary processing chamber is connected to the gas processing system. A third flue connects the plasma furnace and the gas processing system; the third flue is connected to the gas processing system. Shut-off valves are installed on the first, second, and third flues.

2. The integrated plasma treatment device for hazardous waste resource recovery according to claim 1, characterized in that, The gas treatment system includes an ammonia spraying tower, a dust and nitrogen filter cartridge, an alkaline spraying tower, a cooler, a gas storage tank, an adsorption unit, and a main induced draft fan; The secondary treatment chamber and the third flue are both connected to the ammonia injection tower. A first connecting pipe connects the ammonia injection tower to the dust and nitrogen filter cartridge, and a second connecting pipe connects the dust and nitrogen filter cartridge to the alkaline spray tower. A third connecting pipe connects the ammonia injection tower to the alkaline spray tower. A fourth connecting pipe and a fifth connecting pipe connect the alkaline spray tower to the adsorption unit and the cooler, respectively. A sixth connecting pipe connects the adsorption unit and the cooler. The cooler is connected to the main induced draft fan and the gas storage tank through an exhaust pipe and a collection pipe, respectively. A shut-off valve is installed on the first connecting pipe, the third connecting pipe, the fourth connecting pipe, and the fifth connecting pipe; The ammonia injection tower, alkaline spray tower, adsorption unit, cooler, and main induced draft fan constitute the flue gas purification unit; the ammonia injection tower, dust and nitrogen filter cartridge, alkaline spray tower, cooler, and gas storage tank constitute the syngas separation unit. The third flue is connected to the flue gas purification unit, and the secondary treatment chamber is connected to both the flue gas purification unit and the syngas separation unit.

3. The integrated plasma treatment device for hazardous waste resource recovery according to claim 2, characterized in that, A check valve is installed on the second connecting pipe.

4. The integrated plasma treatment device for hazardous waste resource recovery according to claim 1, characterized in that, The feeding system includes a waste lifting unit, a waste mixing unit, a waste feeding pipe, and a feeding port; The waste lifting unit is connected to the plasma furnace through the waste feeding pipe; the waste mixing unit and the feed inlet are both located on the plasma furnace; the waste mixing unit is used to add additives for mixing and treating hazardous waste into the plasma furnace; the feed inlet is used to inject liquid hazardous waste into the plasma furnace; and the bottom of the plasma furnace is provided with a discharge port.

5. The integrated plasma treatment device for hazardous waste resource recovery according to claim 1, characterized in that, The air-assisted combustion system includes a blower, a buffer box, an air supply duct, and an air inlet pipe; the plasma furnace and the buffer box are connected through the first flue, and the blower and the buffer box are connected through the air supply duct; the buffer box and the secondary processing chamber are connected through the air inlet pipe.

6. The integrated plasma treatment device for hazardous waste resource recovery according to claim 2, characterized in that, Both the first flue and the second flue are equipped with gas monitoring units, which are used to determine the calorific value ratio of the combustible gas.

7. An integrated plasma treatment device for hazardous waste resource recovery according to any one of claims 1-6, characterized in that, It also includes a vehicle-mounted container and a processing vehicle. The feeding system, plasma furnace, plasma torch system, air combustion system, secondary processing chamber and gas processing system are integrated in the vehicle-mounted container, which is installed on the processing vehicle.

8. The integrated plasma treatment device for hazardous waste resource recovery according to claim 7, characterized in that, The processing vehicle is also equipped with a main electrical box and a main water tank, and the main electrical box and the main water tank are respectively provided with an external power supply interface and an external water source interface.

9. The integrated plasma treatment device for hazardous waste resource recovery according to claim 7, characterized in that, The processing vehicle is also equipped with a gas source and a chiller. The chiller provides coolant to the plasma torch system, and the gas source provides working gas to the plasma torch system.

10. A method for the plasma treatment of hazardous waste for resource recovery, using an integrated plasma treatment device for hazardous waste resource recovery as described in claim 2, characterized in that, Includes the following steps: Hazardous waste is fed into the plasma furnace through a feeding system; When the hazardous waste is fly ash, the shut-off valves on the first and second flues are closed, the shut-off valve on the third flue is opened, additives are added to the plasma furnace and the fly ash is melted in the plasma furnace. The flue gas generated in the plasma furnace enters the gas treatment system through the third flue and is purified and discharged through the flue gas purification unit. When the hazardous waste is liquid hazardous waste, the shut-off valves on the second and third flues are closed, the shut-off valve on the first flue is opened, and the air combustion system is started. The combustible gas generated by the reaction of the liquid hazardous waste in the plasma furnace enters the secondary treatment chamber through the first flue for supplementary combustion and then enters the gas treatment system, and is purified and discharged through the flue gas purification unit. When the hazardous waste is mixed hazardous waste, the shut-off valves on the first and third flues are closed, and the shut-off valve on the second flue is opened. The mixed hazardous waste is melted in the plasma furnace. The flue gas generated in the plasma furnace enters the secondary treatment chamber through the second flue for supplementary combustion or plasma pyrolysis gasification reaction. The generated gas then enters the gas treatment system and is purified and collected by the syngas separation unit.

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