System and method for synergistically disposing hazardous waste by coupling microwave pyrolysis technology with coal-fired power plants

Abstract

An embodiment of the present invention provides a system and method for synergistically disposing of hazardous waste by coupling microwave pyrolysis technology with a coal-fired power plant, belonging to the field of multi-source organic hazardous waste disposal. The above system includes: a hazardous waste storage bin for storing hazardous waste materials; a metering feeder for controlling the feeding amount of hazardous waste materials into the microwave pyrolysis furnace; a microwave pyrolysis furnace for pyrolyzing the hazardous waste materials to obtain pyrolysis products; a cooling separator for performing gas-liquid separation on the pyrolysis products; an oil-water separator for performing oil-water separation on the pyrolysis products; a pyrolysis gas purification device for performing deacidification treatment on the pyrolysis products; a coal conveying trestle for mixing the pyrolysis products with the power plant coal; a coal mill for grinding the pyrolysis products; a coal-fired boiler for burning the pyrolysis products to obtain incineration flue gas; and an ultra-low emission system for purifying the incineration flue gas and discharging the purified incineration flue gas. The present invention realizes the thorough reduction, harmless treatment, and calorific value recovery and utilization of multi-source organic hazardous waste.

Description

Technical Field

[0001] The present invention relates to the field of multi-source organic hazardous waste disposal, and particularly to a system for co-disposing hazardous waste by coupling microwave pyrolysis technology with a coal-fired power plant and a method for co-disposing hazardous waste by coupling microwave pyrolysis technology with a coal-fired power plant. Background Art

[0002] At present, the main technology for the treatment and disposal of organic hazardous waste is incineration. The incineration treatment method is a high-temperature heat treatment technology, the purpose of which is to harmlessly, reduce the volume, and recycle the waste. However, the biggest drawback of hazardous waste incineration treatment is the generation of secondary pollution such as waste gas. Summary of the Invention

[0003] The purpose of the embodiments of the present invention is to provide a system and a method for co-disposing hazardous waste by coupling microwave pyrolysis technology with a coal-fired power plant to solve the above technical problems.

[0004] To achieve the above purpose, the embodiments of the present invention provide a system for co-disposing hazardous waste by coupling microwave pyrolysis technology with a coal-fired power plant. The system includes a hazardous waste storage bin, a coal conveying trestle, a coal mill, an oil-water separator, a secondary air duct of the boiler, a metering feeder, a microwave pyrolysis furnace, a cooling separator, a pyrolysis gas purification device, a coal-fired boiler, and an ultra-low emission system;

[0005] The hazardous waste storage bin is used for storing hazardous waste materials;

[0006] The metering feeder is connected to the discharge port of the hazardous waste storage bin and is used for controlling the feeding amount of hazardous waste materials into the microwave pyrolysis furnace;

[0007] The microwave pyrolysis furnace is connected to the discharge port of the metering feeder and is used for pyrolyzing the hazardous waste materials to obtain pyrolysis products; wherein, the pyrolysis products include pyrolysis oil gas and pyrolysis solid residue;

[0008] The cooling separator is connected to the outlet of the microwave pyrolysis furnace and is used for separating the pyrolysis oil gas into gas and liquid to obtain pyrolysis liquid and acid-containing pyrolysis gas;

[0009] The oil-water separator is connected to the liquid outlet of the cooling separator and is used for separating the pyrolysis liquid into oil and water to obtain pyrolysis oil and pyrolysis water, and inputting the pyrolysis oil into the coal-fired boiler;

[0010] The pyrolysis gas purification device is connected to the gas outlet of the cooling separator and is connected to the inlet of the coal-fired boiler through the secondary air duct of the boiler. The pyrolysis gas purification device is used for de-acidifying the acid-containing pyrolysis gas to obtain pyrolysis gas, and inputting the pyrolysis gas into the coal-fired boiler through the secondary air duct of the boiler;

[0011] The coal conveyor trestle is connected to the outlet of the microwave pyrolysis furnace and is used to mix the pyrolysis solid slag with the coal for power plants to obtain a mixed fuel.

[0012] The coal mill is connected to the coal conveyor trestle and the inlet of the coal-fired boiler, and is used to grind the mixed fuel to obtain a mixed powder and input the mixed powder into the coal-fired boiler.

[0013] The coal-fired boiler is used to burn the pyrolysis oil, pyrolysis gas and the mixed powder to obtain incineration flue gas.

[0014] The ultra-low emission system is connected to the exhaust port of the coal-fired boiler and is used to purify the incineration flue gas and discharge the purified incineration flue gas.

[0015] Optionally, the system further includes an electrical control system. The metering feeder, the microwave pyrolysis furnace, the cooling separator and the pyrolysis gas purification device are arranged in the electrical control system. The electrical control system is used to adjust and control the process parameters of the metering feeder, the microwave pyrolysis furnace, the cooling separator and the pyrolysis gas purification device correspondingly based on the types of hazardous waste materials.

[0016] Optionally, the electrical control system is further used to determine the type of hazardous waste to be processed currently based on a preset hazardous waste treatment sequence, and open the metering feeder corresponding to the determined type of hazardous waste.

[0017] Optionally, the oil-water separator is connected to the coal conveyor trestle and is further used to input the pyrolysis water into the coal conveyor trestle, so that the coal conveyor trestle uses the pyrolysis water for dust suppression.

[0018] Optionally, the microwave pyrolysis furnace is powered by a coal-fired power plant, and the thermal energy obtained from the incineration of the pyrolysis products by the coal-fired boiler is used to supply power to the coal-fired power plant.

[0019] In the second aspect of the embodiment of the present invention, a method for co-disposing hazardous waste by coupling microwave pyrolysis technology with a coal-fired power plant is provided. The method is implemented based on the system for co-disposing hazardous waste by coupling microwave pyrolysis technology with a coal-fired power plant provided in the first aspect. The method includes:

[0020] Obtain hazardous waste materials;

[0021] Perform pyrolysis treatment on the hazardous waste materials to obtain pyrolysis products; wherein, the pyrolysis products include pyrolysis oil and gas and pyrolysis solid slag.

[0022] Process the pyrolysis oil and gas and the pyrolysis solid slag respectively according to a preset disposal method to obtain pyrolysis oil, pyrolysis gas and a mixed powder.

[0023] Incinerate the pyrolysis oil, the pyrolysis gas and the mixed powder to obtain incineration flue gas;

[0024] Purify the incineration flue gas to obtain the purified incineration flue gas, and discharge the purified incineration flue gas.

[0025] Optionally, the preset disposal method includes:

[0026] Perform gas-liquid separation on the pyrolysis oil and gas to obtain pyrolysis liquid and acid-containing pyrolysis gas;

[0027] Perform deacidification treatment on the acid-containing pyrolysis gas to obtain the pyrolysis gas.

[0028] Optionally, the preset disposal method further includes:

[0029] Perform oil-water separation on the pyrolysis liquid to obtain pyrolysis oil and pyrolysis water;

[0030] Use the pyrolysis water to reduce the dust of the coal conveyor gallery.

[0031] Optionally, the preset disposal method further includes:

[0032] Mix the pyrolysis solid residue with the coal for power plants to obtain a mixed fuel;

[0033] Grind the mixed fuel to obtain a mixed powder.

[0034] Optionally, it includes:

[0035] Based on the preset hazardous waste treatment sequence, determine the type of hazardous waste to be treated currently;

[0036] Open the metering feeder corresponding to the type of hazardous waste according to the determined type of hazardous waste, and input the hazardous waste material of the type of hazardous waste into the microwave pyrolysis furnace through the metering feeder.

[0037] The embodiments of the present invention have the following beneficial effects:

[0038] (1) The embodiments of the present invention deeply couple the harmless treatment of organic hazardous waste with the incineration power generation of coal-fired power plants, use the low-grade steam of coal-fired power plants as the protective gas for microwave pyrolysis of organic hazardous waste to improve the steam utilization rate, the power consumption of microwave pyrolysis comes from coal-fired power plants, and at the same time, the high-calorie products of microwave pyrolysis are introduced into the boiler for incineration and power generation, and the incineration flue gas is purified by the existing ultra-low emission system of the power plant, finally realizing the complete reduction, harmless treatment and calorific value recovery and utilization of organic hazardous waste;

[0039] (2) The embodiments of the present invention perform anaerobic pyrolysis on organic hazardous waste, completely eliminate the generation of dioxins from the source, and at the same time use the existing flue gas purification system of coal-fired power plants to treat the incineration flue gas, so this solution will not cause secondary pollution of flue gas.

[0040] Other features and advantages of the embodiments of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The drawings are used to provide a further understanding of the embodiments of the present invention, and constitute a part of the specification. Together with the following specific implementation, they are used to explain the embodiments of the present invention, but do not constitute a limitation to the embodiments of the present invention. In the drawings:

[0042] Figure 1 is a schematic diagram showing the architecture of a system for co - disposing hazardous waste by coupling microwave pyrolysis technology with a coal - fired power plant according to an embodiment of the present invention;

[0043] Figure 2 is a schematic diagram showing the flow of a method for co - disposing hazardous waste by coupling microwave pyrolysis technology with a coal - fired power plant according to an embodiment of the present invention.

[0044] DESCRIPTION OF THE REFERENCE NUMERALS

[0045] 1 Hazardous waste storage bin; 2 Quantitative feeder; 3 Microwave pyrolysis furnace;

[0046] 4 Cooling separator; 5 Pyrolysis gas purification device; 6 Secondary air duct of the boiler;

[0047] 7 Coal conveyor trestle; 8 Coal mill; 9 Oil - water separator;

[0048] 10 Coal - fired boiler; 11 Ultra - low emission system; 12 Electrical control system. SPECIFIC IMPLEMENTATION

[0049] The following details the specific implementation of the embodiments of the present invention with reference to the drawings. It should be understood that the specific implementation described herein is only for explaining and understanding the embodiments of the present invention, and does not limit the embodiments of the present invention.

[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments, and are not intended to limit this application.

[0051] In the description of the embodiments of this application, technical terms such as "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity, specific order or primary - secondary relationship of the indicated technical features. In the description of the embodiments of this application, "a plurality of" means more than two, unless otherwise specifically defined.

[0052] Embodiment 1

[0053] Please refer toFigure 1 , Figure 1 is a schematic structural diagram of a system for co - disposing hazardous wastes by coupling microwave pyrolysis technology with a coal - fired power plant provided in this embodiment.

[0054] The system for co - disposing hazardous wastes by coupling microwave pyrolysis technology with a coal - fired power plant includes a hazardous waste storage bin 1, a metering feeder 2, a microwave pyrolysis furnace 3, a cooling separator 4, a pyrolysis gas purification device 5, a secondary air duct of the boiler 6, a coal conveyor trestle 7, a coal mill 8, an oil - water separator 9, a coal - fired boiler 10, an ultra - low emission system 11, and an electrical control system 12.

[0055] The multi - source organic hazardous wastes in this embodiment include oil sludge, coal tar residue, waste resin, waste mineral oil, paint sludge, etc.

[0056] It should be understood that in this embodiment, the system for co - disposing hazardous wastes by coupling microwave pyrolysis technology with a coal - fired power plant is two - way and multi - level coupled with the coal - fired power plant. The coal - fired power plant provides electric energy, steam, and coal to the above - mentioned system, and the above - mentioned system supplies power to the coal - fired power plant by burning pyrolysis products.

[0057] The system for co - disposing hazardous wastes by coupling microwave pyrolysis technology with a coal - fired power plant is provided with a plurality of hazardous waste storage bins 1, which are respectively used for storing various hazardous waste materials, and each hazardous waste storage bin 1 stores one type of hazardous waste material.

[0058] It can be understood that the metering feeder 2, the microwave pyrolysis furnace 3, the cooling separator 4, and the pyrolysis gas purification device 5 are all set in the electrical control system 12. The electrical control system 12 adjusts and controls the process parameters of the metering feeder 2, the microwave pyrolysis furnace 3, the cooling separator 4, and the pyrolysis gas purification device 5 correspondingly according to different types of hazardous waste materials input from the hazardous waste storage bin 1. For example, it adaptively adjusts the microwave power, pyrolysis temperature, and pyrolysis time of the microwave pyrolysis furnace 3 based on the type of the current hazardous waste material to be processed, making the current hazardous waste disposal more suitable for this type of hazardous waste material and improving the efficiency of hazardous waste purification. The electrical control system 12 can also open the metering feeder 2 corresponding to the determined hazardous waste type based on the preset hazardous waste treatment sequence, and the metering feeders 2 can be switched with each other for output to ensure that only one type of hazardous waste material is disposed of each time.

[0059] The system for co - disposing hazardous wastes by coupling microwave pyrolysis technology with a coal - fired power plant is provided with a plurality of metering feeders 2. The metering feeder 2 is a sealed metering feeder, and each metering feeder 2 is correspondingly set with each hazardous waste storage bin 1. The feed inlet of the metering feeder 2 is connected to the discharge outlet of the hazardous waste storage bin 1 for receiving the hazardous waste materials output from the corresponding hazardous waste storage bin 1.

[0060] The microwave pyrolysis furnace 3 is connected to the discharge port of the quantitative feeder 2, and is used to heat the hazardous waste materials input by the quantitative feeder 2 with microwaves under an oxygen-free steam condition to obtain pyrolysis oil gas and pyrolysis solid slag. The pyrolysis temperature can be set between 350 - 1000 °C, and the pyrolysis time is set to 5 - 30 min. It should be noted that in this embodiment, the low-pressure cylinder of the steam turbine in the coal-fired power plant is used to provide steam for the microwave pyrolysis furnace 3 as a pyrolysis protective gas, and the power supply of the microwave pyrolysis furnace 3 is provided by this coal-fired power plant to ensure that the hazardous waste materials are pyrolyzed in a steam environment, realizing the utilization of low-grade thermal energy and improving the steam utilization rate; and pyrolysis is carried out under an oxygen-free condition, completely eliminating the generation of dioxins from the source and avoiding secondary pollution.

[0061] The cooling separator 4 is respectively connected to the microwave pyrolysis furnace 3, the oil-water separator 9 and the pyrolysis gas purification device 5. The cooling separator 4 uses a multi-stage circulating water inter-wall cooling method to separate the pyrolysis liquid and the acid-containing pyrolysis gas, and respectively inputs the acid-containing pyrolysis gas and the pyrolysis liquid into the pyrolysis gas purification device 5 and the oil-water separator 9 to support the pyrolysis gas purification device 5 to deacidify the pyrolysis gas and support the oil-water separator 9 to separate the oil and water in the pyrolysis liquid. The setting of the cooling separator 4 reduces the generation of polluted water and reduces the difficulty and cost of subsequent sewage treatment.

[0062] The pyrolysis gas purification device 5 is connected to the gas outlet of the cooling separator 4, and is used to receive the acid-containing pyrolysis gas input by the cooling separator 4 and deacidify the acid-containing pyrolysis gas to remove the acidic substances in the pyrolysis gas to obtain purified pyrolysis gas, reducing the harmful substances in the pyrolysis gas. The acidic substances can be , etc. The purified pyrolysis gas is input into the coal-fired boiler 10 through the secondary air duct 6 of the boiler for incineration.

[0063] The oil-water separator 9 is respectively connected to the cooling separator 4, the coal conveyor bridge 7 and the coal-fired boiler 10, and is used to separate the oil and water in the pyrolysis liquid input by the cooling separator 4 to obtain pyrolysis water and pyrolysis oil. The pyrolysis oil is input into the coal-fired boiler 10 for incineration, and the pyrolysis water is input into the coal conveyor bridge 7 as dust suppression water, realizing water saving and consumption reduction.

[0064] The coal conveyor bridge 7 is respectively connected to the microwave pyrolysis furnace 3, the oil-water separator 9 and the coal mill 8, and is used to mix the pyrolysis solid slag input by the microwave pyrolysis furnace 3 with the power plant coal. The power plant coal can be the coal provided by the above coal-fired power plant, and use the pyrolysis water input by the oil-water separator 9 for dust suppression during the mixing process to obtain a mixed fuel, and input the mixed fuel into the coal mill 8, so that the coal mill 8 grinds the mixed fuel to obtain a mixed powder, and input the mixed powder into the coal-fired boiler 10 for incineration.

[0065] The coal-fired boiler 10 is used to incinerate pyrolysis gas, pyrolysis oil and mixed powder, obtaining incineration flue gas, and the incineration flue gas is then purified and discharged through the ultra-low emission system 11. It is worth mentioning that in this embodiment, the coal-fired boiler 10 is used to incinerate the pyrolysis products, and the heat energy obtained from the incineration is converted into electric energy for the use of the above-mentioned coal-fired power plant. Then, the existing ultra-low emission system 11 of the coal-fired power plant is used to purify and discharge the incineration flue gas.

[0066] This embodiment deeply couples the harmless treatment of multi-source organic hazardous waste with the incineration power generation of a coal-fired power plant, realizing the thorough reduction, harmless treatment and calorific value recovery and utilization of multi-source organic hazardous waste.

[0067] Embodiment Two

[0068] Please refer to Figure 2 , Figure 2 which is a schematic flow chart of a method for coupling a microwave pyrolysis technology with a coal-fired power plant to co-dispose of hazardous waste provided by an embodiment of the present application.

[0069] This embodiment is implemented based on the system for coupling a microwave pyrolysis technology with a coal-fired power plant to co-dispose of hazardous waste provided in Embodiment One.

[0070] Step S100: Obtain hazardous waste materials.

[0071] Specifically, a quantitative feeder 2 is used to weigh a quantitative amount of a certain type of hazardous waste material and input it into the microwave pyrolysis furnace 3.

[0072] It can be understood that in this embodiment, the electrical control system 12 can be used to determine the type of hazardous waste to be processed currently based on a preset sequence of hazardous waste treatment, and then open the corresponding quantitative feeder 2 for the determined type of hazardous waste based on the determined type of hazardous waste, so as to input the hazardous waste material of this type of hazardous waste into the microwave pyrolysis furnace 3 through the quantitative feeder 2. That is, this embodiment provides a method for controlling and switching the output of each quantitative feeder 2, so that only one type of hazardous waste material is disposed of each time, and this embodiment can also adjust the parameters of each device according to the hazardous waste materials of different types of hazardous waste to ensure the adaptive purification treatment of the hazardous waste materials of each type of hazardous waste.

[0073] Step S200: Perform pyrolysis treatment on the hazardous waste materials to obtain pyrolysis products; among them, the pyrolysis products include pyrolysis oil and gas and pyrolysis solid residue.

[0074] Specifically, in this embodiment, the low-pressure cylinder of the steam turbine of the coal-fired power plant is used to provide water vapor as a pyrolysis protective gas for the microwave pyrolysis furnace 3, and the microwave pyrolysis furnace 3 is used to pyrolyze the hazardous waste materials under the condition of oxygen-free water vapor to obtain pyrolysis oil and gas and pyrolysis solid residue.

[0075] Step S300: Treat the pyrolysis oil-gas and pyrolysis solid residue respectively according to preset treatment methods to obtain pyrolysis oil, pyrolysis gas and mixed powder.

[0076] After obtaining the pyrolysis oil-gas and pyrolysis solid residue, it is necessary to treat the pyrolysis oil-gas and pyrolysis solid residue respectively according to preset treatment methods, specifically including: for the pyrolysis oil-gas, use the cooling separator 4 to perform gas-liquid separation on the pyrolysis oil-gas to obtain pyrolysis liquid and acid-containing pyrolysis gas. One branch inputs the acid-containing pyrolysis gas into the pyrolysis gas purification device 5 for deacidification to obtain purified pyrolysis gas, and the purified pyrolysis gas is input into the coal-fired boiler 10 through the secondary air duct 6 of the boiler for incineration. Another branch inputs the pyrolysis liquid into the oil-water separator 9 for oil-water separation to obtain pyrolysis water and pyrolysis oil. The pyrolysis oil is input into the coal-fired boiler 10 for incineration, and the pyrolysis water is input into the coal conveyor gallery 7 as dust suppression water; for the pyrolysis solid residue, use the coal conveyor gallery 7 to mix the pyrolysis solid residue input from the microwave pyrolysis furnace 3 with the power plant coal provided by the coal-fired power plant, and use the pyrolysis water for dust suppression during the mixing process to obtain a mixed fuel. The mixed fuel is input into the coal mill 8 for grinding to obtain mixed powder, and finally the mixed powder is input into the coal-fired boiler 10 for incineration.

[0077] In this embodiment, the pyrolysis gas and pyrolysis oil are recycled for incineration power generation, realizing the harmless treatment and resource utilization of organic hazardous waste. At the same time, because the pyrolysis gas and pyrolysis oil have a high calorific value, it can save coal for the power plant, and the content of heteroatoms in the pyrolysis gas and pyrolysis oil is low, reducing the negative impact on the safe operation of the boiler.

[0078] Step S400: Incinerate the pyrolysis oil, pyrolysis gas and mixed powder to obtain waste flue gas.

[0079] In this step, the coal-fired boiler 10 is used to incinerate the pyrolysis gas, pyrolysis oil and mixed powder to obtain incineration flue gas.

[0080] Step S500: Purify the incineration flue gas to obtain purified incineration flue gas, and discharge the purified incineration flue gas.

[0081] In this embodiment, hazardous waste materials are obtained and pyrolyzed to obtain pyrolysis products, namely pyrolysis oil-gas and pyrolysis solid residue. Then, the pyrolysis oil-gas and pyrolysis solid residue are processed respectively according to a preset disposal method to obtain pyrolysis oil, pyrolysis gas and mixed powder. The pyrolysis oil, pyrolysis gas and mixed powder are incinerated, and the incineration flue gas after incineration is input into the ultra-low emission system 11 for purification and emission. That is, in this embodiment, the microwave pyrolysis furnace 3 is used to heat the organic hazardous waste materials. Compared with the existing heat conduction or autothermal cracking method, microwave heating is more uniform, faster, has less thermal inertia and more accurate temperature control. Therefore, the method provided in this embodiment is more convenient for continuous and automated production and is also more energy-saving. Moreover, in this embodiment, the hazardous waste materials are pyrolyzed, and then the heat energy is recovered through incineration and converted into electric energy to supply power to the coal-fired power plant, realizing the thorough reduction, harmless treatment and calorific value recovery and utilization of the organic hazardous waste.

[0082] In addition, it should be noted that, in the above specific embodiments, the various specific technical features described can be combined in any suitable manner without conflict. To avoid unnecessary repetition, the embodiments of the present invention will not separately describe various possible combination methods.

[0083] In addition, in each embodiment of the present application, the various functional modules can be integrated together to form an independent part, or each module can exist alone, or two or more modules can be integrated to form an independent part.

[0084] It should also be noted that the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent in such process, method, commodity or device. Without further limitation, the element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, commodity or device including the element.

[0085] The above are only the embodiments of the present application and are not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.

Claims

1. A system for co - disposing hazardous wastes by coupling microwave pyrolysis technology with a coal - fired power plant, characterized in that, The system includes a hazardous waste storage bin, a coal conveyor trestle, a coal mill, an oil-water separator, a secondary air duct of the boiler, a metering feeder, a microwave pyrolysis furnace, a cooling separator, a pyrolysis gas purification device, a coal-fired boiler, and an ultra-low emission system; The hazardous waste storage bin is used to store hazardous waste materials; The metering feeder is connected to the discharge port of the hazardous waste storage bin and is used to control the feeding amount of hazardous waste materials into the microwave pyrolysis furnace; The microwave pyrolysis furnace is connected to the discharge port of the metering feeder and is used to pyrolyze the hazardous waste materials to obtain pyrolysis products; wherein, the pyrolysis products include pyrolysis oil-gas and pyrolysis solid slag; The cooling separator is connected to the outlet of the microwave pyrolysis furnace and is used to perform gas-liquid separation on the pyrolysis oil-gas to obtain pyrolysis liquid and pyrolysis gas containing acid; The oil-water separator is connected to the liquid outlet of the cooling separator and is used to perform oil-water separation on the pyrolysis liquid to obtain pyrolysis oil and pyrolysis water, and input the pyrolysis oil into the coal-fired boiler; The pyrolysis gas purification device is connected to the gas outlet of the cooling separator and is connected to the inlet of the coal-fired boiler through the secondary air duct of the boiler. The pyrolysis gas purification device is used to perform deacidification treatment on the pyrolysis gas containing acid to obtain pyrolysis gas, and input the pyrolysis gas into the coal-fired boiler through the secondary air duct of the boiler; The coal conveyor trestle is connected to the outlet of the microwave pyrolysis furnace and is used to mix the pyrolysis solid slag with power plant coal to obtain a mixed fuel; The coal mill is connected to the coal conveyor trestle and the inlet of the coal-fired boiler and is used to grind the mixed fuel to obtain mixed coal powder, and input the mixed coal powder into the coal-fired boiler; The coal-fired boiler is used to burn the pyrolysis oil, pyrolysis gas, and mixed coal powder to obtain combustion flue gas; The ultra-low emission system is connected to the exhaust port of the coal-fired boiler and is used to purify the combustion flue gas and discharge the purified combustion flue gas; The system further includes an electrical control system. The metering feeder, the microwave pyrolysis furnace, the cooling separator, and the pyrolysis gas purification device are arranged in the electrical control system. The electrical control system is used to adjust and control the process parameters of the metering feeder, the microwave pyrolysis furnace, the cooling separator, and the pyrolysis gas purification device correspondingly based on the type of hazardous waste materials.

2. The system for co-disposing hazardous waste by coupling microwave pyrolysis technology with a coal-fired power plant according to claim 1, wherein The electrical control system is further used to determine the type of hazardous waste to be processed currently based on a preset hazardous waste treatment sequence, and open the metering feeder corresponding to the determined type of hazardous waste.

3. The system for co-disposing hazardous waste by coupling microwave pyrolysis technology with a coal-fired power plant according to claim 1, characterized in that, The oil-water separator is connected to the coal conveyor trestle and is further used to input the pyrolysis water into the coal conveyor trestle, so that the coal conveyor trestle uses the pyrolysis water for dust suppression.

4. The system for co - disposing hazardous waste by coupling microwave pyrolysis technology with a coal - fired power plant according to claim 1, wherein, The microwave pyrolysis furnace is powered by a coal-fired power plant, and the thermal energy obtained from the combustion of the pyrolysis products by the coal-fired boiler is used to supply power to the coal-fired power plant.

5. A method for co-disposing hazardous waste by coupling microwave pyrolysis technology with a coal-fired power plant, characterized in that, The method is implemented based on the system for synergistically disposing of hazardous waste by coupling microwave pyrolysis technology with a coal-fired power plant according to any one of claims 1-4. The method includes: Obtaining hazardous waste materials; Performing pyrolysis treatment on the hazardous waste materials to obtain pyrolysis products; wherein, the pyrolysis products include pyrolysis oil-gas and pyrolysis solid slag; Treat the pyrolysis oil gas and pyrolysis solid residue respectively according to the preset treatment methods to obtain pyrolysis oil, pyrolysis gas and mixed powder; Burn the pyrolysis oil, the pyrolysis gas and the mixed powder to obtain incineration flue gas; Purify the incineration flue gas to obtain the purified incineration flue gas, and discharge the purified incineration flue gas.

6. The method for co-disposing hazardous waste by coupling microwave pyrolysis technology with a coal-fired power plant according to claim 5, characterized in that, The preset treatment methods include: Perform gas-liquid separation on the pyrolysis oil gas to obtain pyrolysis liquid and acid-containing pyrolysis gas; Perform deacidification treatment on the acid-containing pyrolysis gas to obtain the pyrolysis gas.

7. The method for co-disposing hazardous waste by coupling microwave pyrolysis technology with coal-fired power plants according to claim 6, characterized in that, The preset treatment methods further include: Perform oil-water separation on the pyrolysis liquid to obtain pyrolysis oil and pyrolysis water; Use the pyrolysis water to reduce the dust of the coal conveying trestle.

8. The method for co - disposing hazardous waste by coupling microwave pyrolysis technology with coal - fired power plants according to claim 7, wherein, The preset treatment methods further include: Mix the pyrolysis solid residue with the power plant coal to obtain a mixed fuel; Grind the mixed fuel to obtain a mixed powder.

9. The method for co-disposing hazardous waste by coupling microwave pyrolysis technology with a coal-fired power plant according to claim 5, wherein Include: Determine the type of hazardous waste to be treated currently based on the preset hazardous waste treatment sequence; Open the quantitative feeder corresponding to the type of hazardous waste according to the determined type of hazardous waste, and input the hazardous waste material of the type of hazardous waste into the microwave pyrolysis furnace through the quantitative feeder.

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