System and method for cracking biomass liquid fuel by direct-current arc plasma

Abstract

The invention relates to the technical field of biomass energy thermochemical conversion, and discloses a system and method for cracking biomass liquid fuel through direct-current arc plasma, the system is characterized in that the feeding end of a plasma generating device is connected with an integrated atomization mixing device, and the integrated atomization mixing device is provided with two input ends; the plasma generating device is connected with the carrier gas assembly and the fuel supply assembly respectively, the plasma generating device is connected with the reaction assembly and used for cracking input fuel, a cracking output port of the reaction assembly is connected with a filtering and collecting assembly, and the plasma generating device is driven by the electric driving assembly. According to the system, liquid fuel is atomized into preheated micron-sized liquid drops by using the fuel supply assembly, so that the liquid fuel is quickly and fully cracked in a high-temperature environment of plasma in the reaction cavity, the gasification reaction rate of the biomass liquid fuel and the cracking gas yield are greatly improved, and the generation of coke and tar in the cracking process is effectively inhibited; therefore, efficient gasification of the biomass liquid fuel is realized.

Description

Technical Field

[0001] This invention relates to the field of biomass energy thermochemical conversion technology, specifically to a system and method for DC arc plasma pyrolysis of biomass liquid fuels. Background Technology

[0002] Titanium, the seventh most abundant metallic element in the Earth's crust, is an important strategic resource. Its low density, high strength, good ductility, and corrosion resistance make it widely used in many key fields. In titanium industrial production, electric furnace smelting is an important method for titanium slag refining, generally using coke as a reducing agent to reduce ilmenite under high-temperature conditions to obtain titanium-rich slag. However, coke is a non-renewable fossil fuel, and its smelting process emits large amounts of carbon monoxide, carbon dioxide, and soot, severely polluting the environment. The large-scale use of fossil fuels has led to energy shortages, threatening national energy security. Therefore, developing low-carbon and zero-carbon smelting processes to reduce carbon emissions is imperative.

[0003] Currently, the most common focus is on the research and development of hydrogen metallurgy technology. Short-process hydrogen metallurgy, especially hydrogen-based vertical shaft furnace short-process, can achieve carbon emission reductions of over 50%. Hydrogen metallurgy possesses a mature technological route and significant advantages in low-carbon products. However, the strong endothermic reaction during hydrogen reduction of oxides in hydrogen metallurgy can lead to uneven temperature distribution within the furnace, affecting product quality. Furthermore, the safety of hydrogen storage, transportation, and utilization, as well as the cost of hydrogen production, still require continuous improvement.

[0004] Another feasible approach is to replace traditional fossil fuels with biomass pyrolysis gasification cogeneration technology.

[0005] Existing research indicates that syngas produced by biomass pyrolysis gasification is cleaner, has a higher calorific value, and is more economically advantageous, making it the preferred method for efficiently utilizing biomass raw materials. Furthermore, utilizing plasma pyrolysis technology with a suitable carrier gas can achieve efficient biomass conversion, increasing syngas yield and quality, effectively suppressing the formation of coke and tar, significantly improving the reduction efficiency of titanium slag, and simultaneously inhibiting carbon dioxide generation during the smelting process.

[0006] Existing research shows that among several voltage power supply methods for generating plasma, DC arc discharge is more stable, simpler, and more efficient, easier to control, significantly quieter, has lower electrode wear, higher energy utilization, and is relatively less sensitive to changes in operating conditions. It also has more mature industrial application technology. Furthermore, DC arc plasma possesses high temperature and high energy density characteristics, enabling efficient energy transfer and selective breaking of complex chemical bonds, giving it unique advantages in industrial processes requiring extreme thermodynamic conditions, such as titanium slag smelting. However, current research on the bond breaking selection of biomass macromolecules and the reaction pathways of free radicals, as well as key influencing factors, during the ionization process of DC arc plasma pyrolysis of biomass liquid fuels remains incomplete. Further research is needed on the reaction mechanism of plasma pyrolysis of biomass liquid fuels and the yield of reducing gas under different parameters, exploring the energy transfer characteristics between high-energy particles and biomass macromolecules and the selective breaking mechanism of specific chemical bonds to overcome the problems of high energy consumption and difficulty in controlling product selectivity in plasma pyrolysis processes. Summary of the Invention

[0007] To address the shortcomings of existing technologies, this invention provides a system and method for pyrolyzing biomass liquid fuels using DC arc plasma, which has advantages such as high-efficiency pyrolysis of biomass liquid fuels and solves the aforementioned technical problems.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a system for pyrolyzing biomass liquid fuel using DC arc plasma, comprising a plasma generating device, wherein one inlet end of the plasma generating device is connected to... Carrier gas cylinder, by Argon gas is supplied by a carrier gas cylinder. The feed end of the plasma generator is connected to an integrated atomizing and mixing device, which has two input ends, connected to the carrier gas assembly and the fuel supply assembly respectively. The plasma generator is connected to a reaction assembly for cracking the input fuel. A filter collection assembly is connected to the cracking output port of the reaction assembly. The plasma generator is driven by an electric drive assembly.

[0009] As a preferred embodiment of the present invention, the carrier gas assembly includes / Carrier gas cylinder; The fuel supply assembly includes a biomass liquid fuel storage tank, a high-precision injection pump, and a temperature-controlled electric heating jacket. After being heated by the temperature-controlled electric heating jacket, the biomass liquid fuel storage tank outputs fuel through the high-precision injection pump. / The output from the carrier gas cylinder is atomized into droplets in an integrated atomizing and mixing device and then fed into the reaction assembly.

[0010] As a preferred embodiment of the present invention, the power drive assembly includes a DC power supply, an excitation power supply, and an oscilloscope; the plasma generator includes an anode, a cathode, and an insulating layer. Argon gas is introduced into the plasma generator from the carrier gas cylinder. A DC power supply is then used to energize the anode and cathode, causing the argon gas to ionize between the anode and cathode before entering the reaction assembly.

[0011] An electromagnetic coil is coaxially arranged around the plasma generator, and the electromagnetic coil is electrically connected to the excitation power supply.

[0012] As a preferred technical solution of the present invention, the reaction assembly includes a reaction chamber, a cooling and quenching device, a thermocouple, a PID controller, and an electrically adjustable circulating water tank. The reaction chamber is used to receive the output of the integrated atomizing mixing device and the plasma generating device. Its output end is connected to the cooling and quenching device. The cooling and quenching device works with the inlet and outlet of the electrically adjustable circulating water tank to achieve circulating water cooling. A thermocouple is connected to the inlet of the electrically adjustable circulating water tank. The thermocouple monitors the temperature of the cooling water discharged from the cooling and quenching device in real time and transmits the signal to the PID controller. The PID controller controls the output flow of the electrically adjustable circulating water tank.

[0013] As a preferred technical solution of the present invention, the pyrolysis products cooled in the cooling and quenching device pass through the pressure reducing valve and are sequentially connected to the gas-solid separation device, the low-temperature condensing device, the drying tower and the gas collection bag to complete gas-solid separation, dehydration and drying.

[0014] As a preferred technical solution of the present invention, the carrier gas assembly, The output ends of the carrier gas cylinder, fuel supply assembly, and electrically adjustable circulating water tank are each equipped with valves and mass flow meters connected in sequence.

[0015] This invention also provides a method for pyrolyzing biomass liquid fuel using DC arc plasma, based on the above-mentioned system for pyrolyzing biomass liquid fuel using DC arc plasma, comprising the following steps: S1: Argon gas is introduced into the plasma generator from the carrier gas cylinder. A DC power supply is then used to energize the anode and cathode, causing the argon gas to ionize between the anode and cathode before entering the reaction assembly. S2: After the biomass liquid fuel storage tank is heated by a temperature-controlled electric heating jacket, it outputs fuel through a high-precision injection pump. / The output from the carrier gas cylinder is atomized into droplets in an integrated atomizing and mixing device and then input into the reaction assembly; S3: The reaction chamber decomposes the components of S1 and S2, and achieves circulating water cooling through the cooling and quenching device in conjunction with the inlet and outlet of the electrically adjustable circulating water tank. A thermocouple is connected to the inlet of the electrically adjustable circulating water tank to monitor the temperature of the cooling water discharged from the cooling and quenching device in real time, and transmits the signal to the PID controller, which controls the output flow of the electrically adjustable circulating water tank. S4: After being cooled in the cooling and quenching device, the pyrolysis products pass through a pressure reducing valve and then through a gas-solid separation device, a low-temperature condensing device, a drying tower and a gas collecting bag connected in sequence to complete gas-solid separation, dehydration and drying. The content of each component in the final gaseous product is determined by gas chromatography-mass spectrometry.

[0016] Compared with the prior art, the present invention provides a system and method for pyrolyzing biomass liquid fuels using DC arc plasma, which has the following advantages: This invention achieves active control over the arc morphology and plasma jet trajectory by introducing an external controllable magnetic field, significantly improving the uniformity of energy distribution and the stability of the reaction process. Simultaneously, the fuel supply component atomizes liquid fuel into preheated micron-sized droplets, allowing for rapid and complete pyrolysis in the high-temperature plasma environment within the reaction chamber. This significantly enhances the gasification reaction rate and pyrolysis gas yield of biomass liquid fuel. The confinement effect of the magnetic field optimizes the arc plasma morphology, improves energy efficiency, and synergistically suppresses the formation of coke and tar with the high-temperature pyrolysis environment. This achieves highly efficient gasification of biomass liquid fuel, providing a clean source of reducing gas for low-carbon smelting. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the system structure of the present invention.

[0018] 1. Plasma generator; 2. 1. Carrier gas cylinder; 2. Valves; 3. Mass flow meter; 4. Excitation power supply; 5. DC power supply; 6. Oscilloscope; 7. Biomass liquid fuel storage tank; 8. High-precision injection pump; 9. Temperature-controlled electric heating mantle; 10. Integrated atomizing mixing device; 11. / 13. Carrier gas cylinder; 14. Reaction chamber; 15. Cooling and quenching device; 16. Pressure reducing valve; 17. Gas-solid separation device; 18. Low-temperature condensation device; 19. Drying tower; 20. Gas collection bag; 21. Thermocouple; 22. PID controller; 23. Electric adjustable circulating water tank. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figure 1 A system for pyrolyzing biomass liquid fuel using DC arc plasma includes a plasma generator 1, with one inlet end of the plasma generator 1 connected to... Carrier gas cylinder 2, by Argon gas is supplied by carrier gas cylinder 2. An electromagnetic coil 23 is coaxially arranged around the plasma generator 1. The electromagnetic coil 23 is electrically connected to the excitation power supply 5. An integrated atomizing mixing device 11 is connected to the feed end of the plasma generator 1. The integrated atomizing mixing device 11 has two input ends, which are respectively connected to the carrier gas assembly and the fuel supply assembly. The plasma generator 1 is connected to the reaction assembly for cracking the input fuel. A filter collection assembly is connected to the cracking output port of the reaction assembly. The plasma generator 1 is driven by an electric drive assembly.

[0021] Carrier gas assembly includes / Carrier gas cylinder 12; The fuel supply assembly includes a biomass liquid fuel storage tank 8, a high-precision injection pump 9, and a temperature-controlled electric heating jacket 10. After being heated by the temperature-controlled electric heating jacket 10, the biomass liquid fuel storage tank 8 is output through the high-precision injection pump 9. / The output of the carrier gas cylinder 12 is atomized into droplets in the integrated atomizing and mixing device 11 and input into the reaction components. The high-precision injection pump 9, model LSP-B01H14, provides power for the flow of biomass liquid fuel. The temperature-controlled electric heating jacket 10, model HDM-2000D, heats the fuel to improve fuel flowability while increasing the initial temperature of the fuel and reducing the reaction activation energy. The fuel supply assembly uses a high-precision injection pump 9 to inject heated liquid fuel into the reaction chamber 13. The fuel supply assembly mainly includes a biomass liquid fuel storage tank 8. / The biomass liquid fuel consists of a carrier gas cylinder 12, a temperature-controlled electric heating jacket 10, a high-precision injection pump 9, and an integrated atomizing and mixing device 11. The biomass liquid fuel is first preheated by the temperature-controlled electric heating jacket 10 to reduce viscosity and improve fluidity. Then, it is pumped by the high-precision injection pump 9 into the short-range metal cavity near the inlet of the plasma generator 1, where it is simultaneously injected. / The mixed carrier gas enables gas-assisted atomization, increasing the contact area and allowing biomass liquid fuel to rapidly pyrolyze and gasify under the high-temperature conditions of high-energy particles. This significantly improves the fuel gasification reaction rate and pyrolysis gas yield, thereby effectively suppressing the formation of coke and tar during the pyrolysis process. An integrated atomizing and mixing device 11 located on the upper left side of the reaction chamber forms micron-sized droplets from the biomass liquid fuel, which are then co-directed into the reaction chamber 13. The core role of the carrier gas is to facilitate this co-transportation. The plasma jet generated by the cathode and anode of the plasma generator 1 is injected into the reaction chamber 13 through a nozzle with a diameter of about 6 mm. The preheated micron-sized fuel droplets in the reaction chamber 13, which is lined with graphite, rapidly decompose under the high temperature conditions of the plasma jet.

[0022] The power drive assembly includes a DC power supply 6, an excitation power supply 5, and an oscilloscope 7. The plasma generator 1 includes an anode, a cathode, and an insulating layer. After argon gas is introduced into plasma generator 1 from carrier gas cylinder 2, DC power supply 6 is used to energize the anode and cathode, so that the argon gas is ionized between the anode and cathode and then enters the reaction assembly; The excitation power supply 5 is used to generate an adjustable axial or radial magnetic field in the electromagnetic coil surrounding the plasma generator 1. The magnetic field controls the shape, trajectory and energy distribution of the electric arc, thereby stabilizing the plasma jet, improving energy transfer efficiency, extending electrode lifespan, and optimizing the temperature field uniformity of the pyrolysis reaction. The oscilloscope 7 monitors the voltage and current waveforms of the plasma generator 1 in real time, which is used to diagnose the stability of the arc discharge, identify abnormal discharge phenomena, and provide real-time data support for adjusting the output parameters of the DC power supply 6 and the excitation power supply 5, thereby ensuring that the system operates in the best working condition.

[0023] The reaction assembly includes a reaction chamber 13, a cooling and quenching device 14, a thermocouple 20, a PID controller 21, and an electrically adjustable circulating water tank 22. The reaction chamber 13 is model XJSY202515. The preheated and atomized biomass liquid fuel is rapidly cracked and gasified under the high temperature of the plasma in the reaction chamber. The cooling and quenching device 14 is model XJSY202515. Cold water is injected to rapidly cool the cracking products in the cooling and quenching device. The reaction chamber 13 is used to receive the output of the integrated atomizing mixing device 11 and the plasma generating device 1. Its output end is connected to the cooling and quenching device 14. The cooling and quenching device 14 works with the inlet and outlet of the electrically adjustable circulating water tank 22 to achieve circulating water cooling. A thermocouple 20 is connected to the inlet of the electrically adjustable circulating water tank 22. The thermocouple 20 monitors the temperature of the cooling water discharged from the cooling and quenching device 14 in real time and transmits the signal to the PID controller 21. The PID controller 21 controls the output flow of the electrically adjustable circulating water tank 22.

[0024] The filter collection assembly includes a pressure reducing valve 15, a gas-solid separation device 16, a low-temperature condensing device 17, a drying tower 18, and a gas collection bag 19. The pyrolysis products, cooled in the cooling and quenching device 14, pass through the pressure reducing valve 15 and then sequentially through the gas-solid separation device 16, the low-temperature condensing device 17, the drying tower 18, and the gas collection bag 19 to complete gas-solid separation, dehydration, and drying. The gas-solid separation device 16, model CF0.5T0406H, is used to separate the pyrolysis gas from the coke in the pyrolysis products. The low-temperature condensing device 17, model XDYQ-5 / 20, can separate the pyrolysis gas from the coke in the cooling and quenching device 14. The quenching device separates residual moisture and tar carried by the pyrolysis gas during cooling. After cooling and quenching, the pyrolysis gas is depressurized by pressure reducing valve 15, and first passes through gas-solid separation filter element 16 to achieve gas-solid separation, retaining coke particles. Then, it passes through low-temperature condensation device 17 to remove residual moisture and tar from quenching. Finally, it passes through gas drying tower 18 for deep dehumidification, and the dried gas is introduced into gas collection bag 19 for temporary storage. Gas collection uses multi-layer composite membrane gas collection bag 19. After the experiment stabilizes, pyrolysis gas is continuously collected, with each sampling lasting 3 minutes. After sampling, the gas collection bag is immediately sealed and stored away from light. Gas component analysis is performed offline, using gas chromatography-mass spectrometry (GC-MS) to determine the content of major components such as H2, CO, and CH4. Finally, the correlation model between plasma parameters and fuel pyrolysis efficiency is optimized based on the GC-MS analysis results of gas products. This platform can realize quantitative research on the efficient pyrolysis process of biomass liquid fuels and provide data support for industrial applications.

[0025] Carrier gas assembly, The output ends of the carrier gas cylinder 2, the fuel supply assembly, and the electrically adjustable circulating water tank 22 are each independently equipped with a valve 3 and a mass flow meter 4 connected in sequence; In the plasma generation system, the DC power supply 6 provides energy using a constant current method, supplying input power to the plasma generator 1. By ionizing the inert gas argon, and with the precise control of the carrier gas flow rate by valve 3 and mass flow meter 4, a high-energy arc discharge is excited between the cathode tungsten and the anode copper, generating a high-temperature plasma jet. Simultaneously, an adjustable electromagnetic coil is introduced to change the arc shape, trajectory, and energy distribution by adjusting the magnetic field strength and direction. The system employs an inert gas pre-replacement process, introducing argon gas before discharge to completely purge the air from the reaction chamber, creating an oxygen-free environment to prevent side reactions. The lower part of the plasma generator 1 is connected to the upper part of the reaction chamber 13, allowing the generated high-temperature plasma jet to directly enter the reaction chamber 13.

[0026] This invention also provides a method for pyrolyzing biomass liquid fuel using DC arc plasma, based on the above-mentioned system for pyrolyzing biomass liquid fuel using DC arc plasma, comprising the following steps: S1: After argon gas is input into plasma generator 1 from carrier gas cylinder 2, the anode and cathode are energized through DC power supply 6. At the same time, excitation power supply 5 is started to drive electromagnetic coil 23 to generate a controllable magnetic field, so that argon gas is ionized between anode and cathode and then enters the reaction assembly. S2: After being heated by the temperature-controlled electric heating jacket 10, the biomass liquid fuel storage tank 8 outputs fuel through the high-precision injection pump 9. / The output of the carrier gas cylinder 12 is atomized into droplets in the integrated atomizing and mixing device 11 and then input into the reaction assembly; S3: The reaction chamber 13 decomposes the components of S1 and S2. During the process, the output of the excitation power supply 5 is dynamically adjusted according to the arc characteristics monitored by the oscilloscope 7. The magnetic field is controlled by the electromagnetic coil 23 to maintain the stability and uniform distribution of the plasma jet. The cooling and quenching device 14 works in conjunction with the inlet and outlet of the electrically adjustable circulating water tank 22 to achieve circulating water cooling. A thermocouple 20 is connected to the inlet of the electrically adjustable circulating water tank 22. The thermocouple 20 monitors the temperature of the cooling water discharged from the cooling and quenching device 14 in real time and transmits the signal to the PID controller 21. The PID controller 21 controls the output flow of the electrically adjustable circulating water tank 22. S4: The pyrolysis products cooled in the cooling and quenching device 14 pass through the pressure reducing valve 15 and then through the gas-solid separation device 16, the low-temperature condensing device 17, the drying tower 18 and the gas collecting bag 19 connected in sequence to complete gas-solid separation, dehydration and drying. The content of each component is determined by gas chromatography-mass spectrometry on the final gas product.

[0027] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A system for pyrolyzing biomass liquid fuel using DC arc plasma, characterized in that: Includes a plasma generator (1), one of the inlet ends of which is connected to Carrier gas cylinder (2), by The carrier gas cylinder (2) provides argon gas. The feed end of the plasma generator (1) is connected to an integrated atomizing mixing device (11), and the integrated atomizing mixing device (11) is provided with two input ends, which are respectively connected to the carrier gas assembly and the fuel supply assembly. The plasma generator (1) is connected to the reaction assembly for cracking the input fuel. A filter collection assembly is connected to the cracking output port of the reaction assembly. The plasma generator (1) is driven by an electric drive assembly.

2. The system for DC arc plasma pyrolysis of biomass liquid fuel according to claim 1, characterized in that: The carrier gas assembly includes Carrier gas cylinder (12); The fuel supply assembly includes a biomass liquid fuel storage tank (8), a high-precision injection pump (9), and a temperature-controlled electric heating jacket (10). After the biomass liquid fuel storage tank (8) is heated by the temperature-controlled electric heating jacket (10), the output of the high-precision injection pump (9) and the output of the Ar / N2 carrier gas cylinder (12) form atomized droplets in an integrated atomizing mixing device (11) and are input into the reaction assembly.

3. The system for DC arc plasma pyrolysis of biomass liquid fuel according to claim 2, characterized in that: The electric drive assembly includes a DC power supply (6), an excitation power supply (5), and an oscilloscope (7). The plasma generator (1) includes an anode, a cathode, and an insulating layer. After argon gas is introduced into the plasma generator (1) by the carrier gas cylinder (2), the anode and cathode are energized by the DC power supply (6) so that the argon gas is ionized between the anode and cathode and then enters the reaction assembly; The plasma generator (1) is equipped with an electromagnetic coil (23) on its periphery, and the electromagnetic coil (23) is electrically connected to the excitation power supply (5).

4. The system for DC arc plasma pyrolysis of biomass liquid fuel according to claim 3, characterized in that: The reaction assembly includes a reaction chamber (13), a cooling and quenching device (14), a thermocouple (20), a PID controller (21), and an electrically adjustable circulating water tank (22). The reaction chamber (13) is used to receive the output of the integrated atomizing mixing device (11) and the plasma generating device (1). Its output end is connected to the cooling and quenching device (14). The cooling and quenching device (14) works with the inlet and outlet of the electrically adjustable circulating water tank (22) to achieve circulating water cooling. A thermocouple (20) is connected to the inlet of the electrically adjustable circulating water tank (22). The thermocouple (20) monitors the temperature of the cooling water discharged from the cooling and quenching device (14) in real time and transmits the signal to the PID controller (21). The PID controller (21) controls the output flow of the electrically adjustable circulating water tank (22).

5. The system for DC arc plasma pyrolysis of biomass liquid fuel according to claim 4, characterized in that: The filtration and collection assembly, consisting of a pressure reducing valve (15), a gas-solid separation device (16), a low-temperature condensing device (17), a drying tower (18), and a gas collection bag (19), allows the pyrolysis products cooled in the cooling and quenching device (14) to pass through the pressure reducing valve (15) and then sequentially through the gas-solid separation device (16), the low-temperature condensing device (17), the drying tower (18), and the gas collection bag (19) to complete gas-solid separation, dehydration, and drying.

6. The system for pyrolyzing biomass liquid fuel using DC arc plasma according to claim 1, characterized in that: The carrier gas assembly, The output ends of the gas cylinder (2), fuel supply assembly and electrically adjustable circulating water tank (22) are each equipped with a valve (3) and a mass flow meter (4) connected in sequence.

7. A method for pyrolyzing biomass liquid fuel using direct current arc plasma, based on the system for pyrolyzing biomass liquid fuel using direct current arc plasma according to any one of claims 1-6, characterized in that: Includes the following steps: S1: After argon gas is introduced into the plasma generator (1) by the carrier gas cylinder (2), the anode and cathode are energized by the DC power supply (6) so that the argon gas is ionized between the anode and cathode and then enters the reaction assembly; S2: After the biomass liquid fuel storage tank (8) is heated by the temperature-controlled electric heating jacket (10), it outputs fuel through a high-precision injection pump (9). / The output of the carrier gas cylinder (12) is atomized into droplets in the integrated atomizing mixing device (11) and input into the reaction assembly; S3: The reaction chamber (13) decomposes the components of S1 and S2, and achieves circulating water cooling through the cooling and quenching device (14) in conjunction with the inlet and outlet of the electrically adjustable circulating water tank (22). A thermocouple (20) is connected to the inlet of the electrically adjustable circulating water tank (22). The thermocouple (20) monitors the temperature of the cooling water discharged from the cooling and quenching device (14) in real time and transmits the signal to the PID controller (21). The PID controller (21) controls the output flow of the electrically adjustable circulating water tank (22). S4: After being cooled in the cooling and quenching device (14), the pyrolysis products pass through the pressure reducing valve (15) and then through the gas-solid separation device (16), the low-temperature condensing device (17), the drying tower (18) and the gas collecting bag (19) connected in sequence to complete gas-solid separation, dehydration and drying. The content of each component is determined by gas chromatography-mass spectrometry for the final gas products.

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