A continuous reaction system and method for establishing molten salt pyrolysis

Abstract

The application relates to a continuous reaction system and method for establishing molten salt thermal cracking, and relates to the technical field of molten salt thermal cracking reaction. The application comprises a sealed molten salt reaction system, a suspension type orbiting conveying system, a movable reaction frame group, an oil gas condensation and recovery system, an RTO waste gas treatment system, an absorption type ice water supply system, a molten salt storage and supplementary supply system and a nitrogen generation and supplementary supply system. The orbit of the suspension type orbiting conveying system is arranged in the front and rear water seal tanks of the sealed molten salt reaction system, the gas entrained by the reactants and the thermal cracking reaction products is left in the original space, the front and rear water seal tanks form a free moving gate, the reactants and the thermal cracking reaction products pass through the gate, the air introduction and the thermal cracking gas leakage can be effectively prevented, the sealed molten salt reaction system space is established, the reactants are continuously moved into the front end, the thermal cracking reaction products are continuously moved out of the rear end, the gas in and out is effectively prevented, and the continuous thermal cracking reaction operation target is achieved.

Description

Technical Field

[0001] This invention relates to the field of molten salt thermal pyrolysis reaction technology, specifically to a method and system for establishing a continuous molten salt thermal pyrolysis reaction. Background Technology

[0002] Molten salt pyrolysis organic polymer blends can easily convert polymer materials into carbon and pyrolysis gases, allowing the original matrix components, such as... Figure 1 As shown, the substrates such as metals and fibers can be easily separated, and their pyrolysis gases can be easily converted into pyrolysis oil through condensation. Non-condensable gases can be incinerated to obtain stable carbon dioxide and water, enabling effective treatment and recycling. Currently, the molten salt pyrolysis process suffers from batch operation problems. The unidirectional introduction and removal process cannot simultaneously introduce and remove reactants and pyrolysis products, causing difficulties in large-scale production. Furthermore, the pyrolysis gas exhibits fluctuating volumes, increasing the challenges of downstream condensation and waste gas treatment. Molten salt replenishment cannot be done simultaneously with pyrolysis, affecting operating conditions and interrupting the production process. Moreover, the inability to plan production layout in accordance with the operational procedures hinders commercialization. For example, the invention patent application number CN200910041003.9, "Method and System for Classifying and Recycling Substrates of Pyrolysis Organic Polymer Mixtures," describes a processing system structure as follows... Figure 2 The system shown is a single-batch operation system. The amount of pyrolysis gas produced varies greatly, requiring a gas expansion and absorption device to balance the operating pressure. This makes continuous operation of the pyrolysis operation impossible. It is also impossible to simultaneously introduce reactants and directly remove pyrolysis reaction products during pyrolysis, which poses a challenge for quantitative production processes. The fluctuating amount of pyrolysis gas causes handling problems, and there are also issues with replenishing molten salt losses. Furthermore, it is impossible to combine the layout of the production site with the feeding and discharging operations. These and other challenges need to be overcome, making it difficult to promote the aforementioned patent.

[0003] Therefore, this study focuses on the molten salt thermal pyrolysis reaction system and method. How to establish a continuous operation thermal pyrolysis system and method that utilizes a conveying system for continuous introduction and removal has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] The main objective of this invention is to provide a method and system for establishing a continuous molten salt pyrolysis reaction system, which allows reactants and pyrolysis products to freely enter and exit a sealed molten salt reaction system, establishes a micro-pressure sealed operating environment, ensures that the pyrolysis reaction operates in an oxygen-deficient and safe environment, and establishes a continuous transport scheme that can move reactants into and out of the pyrolysis reaction without interrupting the pyrolysis reaction, thereby achieving the goal of continuous operation.

[0005] To achieve the above objectives, the present invention provides a continuous molten salt pyrolysis reaction system, comprising a sealed molten salt reaction system, a suspended track conveying system, a mobile reaction frame assembly, an oil and gas condensation and recovery system, an RTO waste gas treatment system, an absorption chilled water supply system, a molten salt storage and replenishment supply system, and a nitrogen generation and replenishment supply system; wherein,

[0006] The movable reaction frame assembly is connected to the suspended track-mounted conveying system and is used to carry the reactants;

[0007] The suspended track-mounted conveyor system is used to move the reactants mounted on the movable reaction frame through the sealed molten salt reaction system.

[0008] The sealed molten salt reaction system is used to heat and thermally decompose the reactants to generate thermal decomposition products and thermal decomposition gas. The thermal decomposition gas rises and enters the oil and gas condensation and recovery system.

[0009] The oil and gas condensation and recovery system is used to rapidly cool the pyrolysis gas to form pyrolysis oil, which flows down the condenser to the lower end of the oil and gas condensation and recovery system. The condensed non-condensable pyrolysis gas is introduced into the RTO waste gas treatment system through the outlet for treatment.

[0010] The RTO exhaust gas treatment system incinerates the non-condensable pyrolysis gas and converts it into harmless tail gas, which is then introduced into an absorption chilled water supply system.

[0011] The absorption chilled water supply system is used to convert the thermal energy of the exhaust gas into condensed cooling water.

[0012] The molten salt storage and replenishment system is used to replenish the molten salt carried out with the products of the pyrolysis reaction, and maintain a fixed amount of molten salt so that the pyrolysis reaction can continue.

[0013] The nitrogen generation and supply system provides the nitrogen required for deoxygenation before the sealed molten salt reaction system is put into operation.

[0014] Furthermore, the sealed molten salt reaction system includes a molten salt reaction tank, a front water seal tank, a rear water seal tank, and an isolation plate; the front water seal tank and the rear water seal tank are respectively distributed at the front and rear ends of the molten salt reaction tank; a molten salt reaction tank heater is provided below the molten salt reaction tank, a hot molten salt inlet is provided above the front end, and a hot molten salt overflow outlet is provided above the rear end, with the overflowing molten salt flowing back into the molten salt storage and replenishment tank; a molten salt discharge valve is provided at the bottom of the rear end for draining the molten salt in the molten salt reaction tank and returning it to the molten salt storage and replenishment tank; both the front and rear water seal tanks adopt a concave barrier design, and the water seal reaches a fixed water level through the front water seal inlet valve and the rear water seal inlet valve; an isolation plate is provided between the front and rear water seal tanks, allowing the water seal to form two spaces, inner and outer.

[0015] Furthermore, the suspended rail conveying system includes a conveying motor, a conveying chain, and a suspended conveying track; the suspended conveying track passes sequentially through the front water seal tank, above the molten salt reaction tank, and the rear water seal tank to form a closed loop, and the conveying chain is driven by the conveying motor and travels along the suspended conveying track.

[0016] Furthermore, the front end of the oil-gas condensation recovery system is connected to the exhaust gas outlet above the sealed molten salt reaction system, allowing the pyrolysis gas to be introduced into the oil-gas condensation recovery system. After entering the oil-gas condensation system, the temperature of the pyrolysis gas is reduced. Most of the pyrolysis gas in the pyrolysis gas condenses into pyrolysis oil and is led out through the pyrolysis oil outlet below. A small portion is pyrolysis non-condensable gas, which is discharged through the condensate gas outlet and introduced into the downstream RTO exhaust gas treatment system for incineration into stable and harmless gas.

[0017] Furthermore, the RTO waste gas treatment system is a regenerative waste gas treatment device. The inlet of the regenerative waste gas treatment device is connected to the gas outlet of the oil and gas condensation recovery system, and non-condensable gas from thermal cracking is introduced for incineration. The tail outlet is connected to an absorption chilled water supply system to produce chilled water for cooling the oil and gas condensation recovery system.

[0018] Furthermore, the molten salt storage and replenishment system includes a molten salt storage and replenishment tank, a molten salt supply pump, and a molten salt return filter. The molten salt storage and replenishment tank has a molten salt heater at the bottom, a molten salt outlet on the lower side, a molten salt outlet and a molten salt return port at the top, and a molten salt inlet on the upper side. The molten salt outlet is connected to the hot molten salt inlet of the molten salt reaction tank via the molten salt pump. The molten salt inlet is used to introduce solid molten salt into the molten salt storage and replenishment tank, where it is heated by the molten salt heater to melt and convert into liquid molten salt. This liquid molten salt is then introduced into the molten salt reaction tank via the molten salt circulation pump. Overflowing molten salt flows back through the hot molten salt overflow outlet of the molten salt reaction tank, and after passing through the molten salt return filter, it enters the molten salt storage and replenishment tank.

[0019] Furthermore, the nitrogen generation and supply system separates nitrogen and oxygen by passing compressed air gas through a molecular sieve to obtain high-purity nitrogen, which is used to provide the nitrogen required for deoxygenation before the operation of the sealed molten salt reaction system. The nitrogen from the nitrogen generation and supply system is temporarily stored in a storage tank and introduced into the sealed molten salt reaction system through a control valve to carry out deoxygenation operations within the sealed molten salt reaction system.

[0020] A method for establishing a continuous reaction of molten salt pyrolysis, implemented using any of the above-described methods for establishing a continuous reaction system of molten salt pyrolysis, is as follows:

[0021] (1) Using a sealed molten salt reaction system as a tool to generate a thermal pyrolysis reaction;

[0022] (2) Use a suspended fixed-track conveyor system as a means of transporting reactants and thermal decomposition reaction products into and out of a sealed molten salt reaction system;

[0023] (3) Use the movable reaction rack as a moving carrier for reactants and thermal decomposition reaction products;

[0024] (4) Use the oil and gas condensation recovery system as a tool for recovering thermal cracked oil;

[0025] (5) Use the RTO waste gas incineration system as a tool for treating non-condensable gases from thermal pyrolysis.

[0026] (6) Use an absorption chilled water supply system as a tool for recovering waste heat from exhaust gas in waste gas treatment.

[0027] (7) Utilize the molten salt storage and replenishment supply system as a tool for storing and replenishing molten salt in a sealed molten salt reaction system;

[0028] (8) Use the nitrogen generation and replenishment system as a deoxygenation tool in the space of the sealed molten salt reaction system.

[0029] Furthermore, the specific steps include the following:

[0030] Step S1: Deoxidation is carried out in a sealed molten salt reaction system;

[0031] The nitrogen introduced into the sealed molten salt reaction system displaces the air that was originally in the space of the sealed molten salt reaction system, and then enters the oil and gas condensation recovery system, RTO waste gas treatment system and absorption chilled water supply system in sequence before being discharged; the RTO waste gas treatment system is turned on to prepare for operation before treatment, and waste gas treatment can be carried out when the incineration temperature is reached.

[0032] Step S2: The movable reaction frame assembly is introduced into the molten salt of the molten salt reaction tank through a suspended conveyor track for heating and thermal decomposition reaction;

[0033] To prepare for the operation of the suspended rail-mounted conveyor system, the suspended conveyor motor is started for a conveying operation test. The reactants are placed on the movable reaction frame assembly, which is then hung on the suspended rail-mounted conveyor system. The suspended conveyor motor is started, pulling the rail-mounted rolling pulleys clockwise, continuously moving forward, allowing the movable reaction frame assembly containing the reactants to advance into the water seal trough. As it passes through the water seal trough, the movable reaction frame assembly descends with the suspended conveyor track into the water seal. The water in the water seal trough will squeeze out the air entrained in the reactants in the movable reaction frame assembly. After passing through the water seal, it rises with the suspended conveyor track above the molten salt reaction tank. The movable reaction frame assembly is then guided into the molten salt of the molten salt reaction tank for heating by fixing it in place by the suspended conveyor track. In the thermal cracking reaction, the thermally cracked gas rises into the oil and gas condensation and recovery system. Its thermal cracking time is the same as the travel time of the molten salt reaction tank in the suspended rail conveying system. After the reaction, it rises and falls along the suspended conveying track and is introduced into the rear water seal tank. The water in the rear water seal tank will squeeze out the thermal cracking gas from the removed thermal cracking reaction products and cool the thermal cracking reaction products, so that the thermal cracking reaction products removed from the movable reaction frame group stop the thermal cracking reaction, are safely removed and sent to the workplace where the movable reaction frame group is removed, and the thermal cracking reaction process is completed. By continuously conveying reactants into the sealed molten salt reaction system, thermal cracking reaction products can be continuously removed to achieve continuous reaction operation.

[0034] In step S3, the pyrolysis gas generated by the pyrolysis reaction is introduced into the oil and gas condensation recovery system. Circulating cooling water is introduced to rapidly cool the pyrolysis gas, forming pyrolysis oil that flows down the condenser to the lower end of the oil and gas condensation recovery system and is then led out through a control valve. The condensed non-condensable pyrolysis gas is introduced into the RTO waste gas treatment system for treatment. The non-condensable pyrolysis gas is incinerated by the RTO waste gas treatment system and converted into harmless tail gas. The tail gas is then introduced into the downstream absorption chilled water supply system, where its thermal energy is converted into cooling water for use in the oil and gas condensation recovery system. Subsequently, the tail gas is discharged through a chimney.

[0035] Furthermore, before step S1, the process also includes: step S0, performing pre-operation preparations before starting the molten salt pyrolysis continuous reaction system.

[0036] (1) Start the absorption chilled water supply system to circulate the chilled water for condensation and cooling;

[0037] (2) Start the RTO exhaust gas treatment system;

[0038] (3) Start the molten salt storage and replenishment supply system, introduce the pre-prepared molten salt into the molten salt storage and replenishment supply tank through the molten salt inlet, start the molten salt heater to melt the molten salt into liquid molten salt and reach the temperature required for thermal decomposition, turn on the reaction tank heater of the molten salt reaction tank to preheat the molten salt reaction tank to prevent the molten salt from cooling and clumping, after the reaction tank heater is preheated, start the molten salt circulation pump to circulate the molten salt; replenish the front water seal tank and the rear water seal tank with clean water so that the isolation plate and the suspended conveying track are deep under the water seal, so that the sealed molten salt reaction system is completely isolated from the external space; introduce compressed air into the nitrogen generation replenishment supply system, the molecular sieve draws out the oxygen and leaves the nitrogen, and then introduces the nitrogen into the top of the molten salt reaction tank.

[0039] The beneficial effects of this invention are as follows:

[0040] This invention utilizes a suspended track-mounted conveyor system, a movable reaction frame, and a sealed molten salt reaction system. The track of the suspended track-mounted conveyor system is set within the water seal tanks before and after the sealed molten salt reaction system. This allows the reactants and gases entrained by the pyrolysis reaction products to remain in the original space, while the water seal tanks form a freely movable gate. This allows reactants and pyrolysis reaction products to pass through while preventing entrained gases from passing through, effectively blocking the introduction of air and the leakage of pyrolysis gas. This establishes a sealed molten salt reaction system space, enabling the continuous insertion of reactants at the front end and the continuous removal of pyrolysis reaction products at the rear end, effectively blocking the entry and exit of gases and achieving the goal of continuous pyrolysis reaction operation. Attached Figure Description

[0041] Figure 1 This is a flow chart of the existing molten salt pyrolysis process;

[0042] Figure 2 This is a schematic diagram of the processing system structure in the prior art;

[0043] Figure 3 This is a schematic diagram of the overall structure of the present invention;

[0044] Figure 4 This is a flowchart of the method of the present invention.

[0045] In the figure:

[0046] 1. Sealed molten salt reaction system; 2. Suspended fixed-rail conveying system; 3. Movable reaction frame assembly; 4. Oil and gas condensation recovery system; 5. RTO waste gas treatment system; 6. Absorption chilled water supply system; 7. Molten salt storage and replenishment supply system; 8. Nitrogen generation and replenishment supply system; 10. Molten salt reaction tank; 11. Front water seal tank; 12. Rear water seal tank; 13. Isolation plate; 14. Molten salt inlet of molten salt reaction tank; 15. Molten salt overflow outlet of molten salt reaction tank; 16. Discharge outlet of molten salt reaction tank; 17. Molten salt; 18. Pyrolysis carbon slag and impurities; 19. 191. Pyrolysis gas; 192. Pyrolysis oil; 21. Non-condensable pyrolysis gas; 22. Suspended conveyor track; 73. Molten salt storage and replenishment tank; 74. Molten salt inlet; 75. Molten salt reflux filter; A. Reactants; B. Pyrolysis reaction products; Air. Compressed air; N2. Nitrogen; O2. Oxygen; H0. Molten salt heater; H1. Reaction tank heater; M. Suspended conveyor motor; P. Molten salt circulation pump; W0. Clean water; WL. Condensate cooling water; V1. Front water seal inlet valve; V2. Rear water seal inlet valve; V3. Molten salt discharge valve. Detailed Implementation

[0047] To achieve the above objectives and effects, the technical means and structure adopted by the present invention will be described in detail with reference to the accompanying drawings, focusing on the features and functions of the preferred embodiments of the present invention.

[0048] This invention delves into molten salt pyrolysis reaction systems and methods, establishing a continuous operation pyrolysis system and method that utilizes a conveying system for continuous introduction and removal of reactants. In particular, the sealing of the molten salt reactor must not be compromised during reactant transport, and the molten salt carried out by the pyrolysis reaction products can be replenished at any time. Furthermore, it addresses the effective recovery and utilization of pyrolysis gases and energy-saving and emission-reduction measures, significantly improving the operational efficiency of the molten salt pyrolysis system. Through years of testing and research, a continuous molten salt pyrolysis reaction method and system have been developed for industrial application.

[0049] like Figure 3 As shown, this invention provides a continuous molten salt pyrolysis reaction system, comprising a sealed molten salt reaction system 1, a suspended track-mounted conveying system 2, a movable reaction frame assembly 3, an oil and gas condensation and recovery system 4, an RTO waste gas treatment system 5, an absorption chilled water supply system 6, a molten salt storage and replenishment supply system 7, and a nitrogen generation and replenishment supply system 8; wherein,

[0050] The movable reaction frame assembly 3 is connected to the suspended fixed-track conveying system 2 and is used to carry reactant A;

[0051] The suspended track-mounted conveyor system 2 is used to drive the reactants set on the movable reaction frame group 3 through the sealed molten salt reaction system 1.

[0052] The sealed molten salt reaction system 1 is used to heat and thermally decompose reactant A to generate thermal decomposition product B and thermal decomposition gas. The thermal decomposition gas 19 rises and enters the oil and gas condensation and recovery system 4.

[0053] The oil and gas condensation recovery system 4 is used to rapidly cool the thermal cracking gas 19 to form thermal cracking oil 191, which flows down the condenser to the lower end of the oil and gas condensation recovery system 4; the condensed thermal cracking non-condensable gas is introduced into the RTO waste gas treatment system 5 through the outlet for treatment.

[0054] The non-condensable pyrolysis gas 192 of the RTO waste gas treatment system 5 is incinerated and converted into harmless tail gas, and the tail gas is introduced into the absorption chilled water supply system 6.

[0055] The absorption chilled water supply system 6 is used to convert the thermal energy of the exhaust gas into condensed cooling water.

[0056] The molten salt storage and replenishment system 7 is used to replenish the molten salt carried out with the products of the thermal decomposition reaction, and maintain a fixed amount of molten salt so that the thermal decomposition reaction can proceed continuously.

[0057] The nitrogen generation and supply system 8 provides the nitrogen required for deoxygenation before the operation of the sealed molten salt reaction system 1.

[0058] In this embodiment, the sealed molten salt reaction system 1 includes a molten salt reaction tank 10, a front water seal tank 11, a rear water seal tank 12, and a partition plate 13. The front water seal tank 11 and the rear water seal tank 12 are respectively distributed at the front and rear ends of the molten salt reaction tank 10. The molten salt reaction tank 10 is a long strip-shaped reaction tank. A heater is provided below the molten salt reaction tank 10 to provide the heat energy required for the pyrolysis reaction and maintain the required molten salt temperature. A hot molten salt inlet 14 is provided above the front end to provide a molten salt replenishment and storage circulation system to introduce liquid molten salt and provide the amount of molten salt required for pyrolysis. A hot molten salt overflow outlet 15 is provided above the rear end to allow for... Excess molten salt 17 introduced into the molten salt reaction tank 10 is returned to the molten salt storage and replenishment supply tank 71. The excess molten salt can be drawn back through natural reflux, allowing the molten salt 17 to circulate and carry out the pyrolysis task. A molten salt reaction tank discharge outlet 16 is provided at the lower rear end of the molten salt reaction tank 10, and a molten salt discharge valve V3 is provided to drain the molten salt in the molten salt reaction tank 10 and return it to the molten salt storage and replenishment supply tank 71. Both the front water seal tank 11 and the rear water seal tank 12 adopt a concave barrier design. The water seal reaches a fixed water level through the front water seal inlet valve V1 and the rear water seal inlet valve V2. An isolation plate 13 is provided between the front water seal tank 11 and the rear water seal tank 12 to form two spaces inside and outside the water seal. The rear water seal tank 12 has a function to stop the pyrolysis reaction. When removing the pyrolysis reactants, the rear water seal tank 12 can cool the pyrolysis reactants, stopping the pyrolysis reaction and ensuring that the removed pyrolysis products can safely stop reacting, avoiding the hazards of pyrolysis gas produced by continued reaction. The suspended conveyor track 21 of the suspended fixed-track conveying system 2 descends and is immersed in the front water seal tank 11, then rises and is fixed above the molten salt reaction tank 10, allowing the movable reaction frame assembly 3 to be immersed in the molten salt reaction tank 10. The reactants are heated in the molten salt to carry out a thermal decomposition reaction. After the thermal decomposition reaction, the track rises again and turns and descends into the rear water seal tank 12. The suspended conveyor track 21 is completely immersed in the water seal tank. After being isolated by the water seal, the suspended conveyor track 21 rises again and returns to the feeding position. Through the above-mentioned layout of the suspended conveyor track 21, the suspended fixed-track conveying system 2 can completely block the introduction of air and the discharge of thermal decomposition gas 19 by the water seal when conveying reactants and thermal decomposition reaction products, forming a completely sealed molten salt thermal decomposition reaction system.

[0059] The movable reaction frame assembly 3 provides a space for the thermal decomposition of reactants, allowing them to remain in molten salt during thermal decomposition. It can be directly suspended on the suspended rail conveyor system 2 for transport, and the thermal decomposition products can be easily retrieved and recovered. The movable reaction frame assembly 3 consists of a stainless steel frame surrounded by a stainless steel mesh to restrict the movement of reactants and thermal decomposition products out of the assembly. This mesh allows the liquid molten salt to freely enter and exit, heating the reactants and causing thermal decomposition. Reactants can be vertically introduced into the movable reaction frame assembly 3. The assembly can be customized according to the needs of the reactants, restricting and arranging them based on their size and thickness to prevent large-scale movement during thermal decomposition. The outer stainless steel mesh provides a channel for the liquid molten salt to enter and exit, allowing for uniform heating and thermal decomposition. The movable reaction frame assembly 3 is transported to a fixed position by the suspended rail conveyor system 2, allowing it to remain fixed in the molten salt for thermal decomposition. The movable reaction frame assembly 3 allows for the addition and removal of small batches of reactants at different times, achieving continuous operation.

[0060] In this embodiment, the suspended track-fixed conveying system 2 includes a conveying motor, a conveying chain, and a suspended conveying track 21. The suspended conveying track 21 passes sequentially through the front water seal trough 11, above the molten salt reaction tank 10, and the rear water seal trough 12, forming a closed loop. The conveying chain is driven by the conveying motor and travels along the suspended conveying track 21. The suspended track-fixed conveying system 2 can be laid out according to the operational requirements of the processing space. By fixing the suspended conveying track 21, a customized layout can be made according to the working space, including the working space for placing reactants into the movable reaction frame, the working space for conveying and hanging the movable reaction frame, the conveying walking space, the front water seal barrier space, the reactant pyrolysis space, the rear water seal barrier space, the working space for removing the movable reaction frame after pyrolysis, and the working space for removing the pyrolysis reaction products, etc., in series. It can be easily controlled according to the operation process of a single conveying system, effectively integrating the continuous reaction process of molten salt pyrolysis, achieving the target of track-fixed operation and spatial layout, and allowing the upper, lower, left, and right spaces of the track conveying to be completely fixed, thus determining the requirements for performing various tasks. The moving speed of the suspended fixed-rail conveyor system serves as the basis for controlling the pyrolysis reaction time. The pyrolysis reaction time can be controlled through the fixed-rail suspended conveyor system. When the pyrolysis time is long, the conveying speed can be reduced to meet the requirements of the extended pyrolysis reaction time. By linking the circulating moving speed with the pyrolysis reaction time, the purpose of control can be easily achieved.

[0061] In this embodiment, the front end of the oil-gas condensation recovery system 4 is connected to the exhaust gas outlet above the sealed molten salt reaction system 1, allowing the pyrolysis gas 19 to be introduced into the oil-gas condensation recovery system 4. The oil-gas condensation recovery system 4 uses ice water cooling, and the source of the ice water can be the ice water converted from the heat energy recovery of the tail gas in the later stage to improve operating efficiency. After the pyrolysis gas 19 enters the oil-gas condensation system, its temperature is reduced. Most of the pyrolysis gas in the pyrolysis gas 19 condenses into pyrolysis oil 191 and is led out through the lower pyrolysis oil 191 outlet. A small portion is pyrolysis non-condensable gas, which is discharged through the condensate gas outlet and introduced into the later RTO exhaust gas treatment system 5 to be incinerated into stable and harmless gas. The condensed pyrolysis oil 191 can be led out through the lower pyrolysis oil 191 outlet for further recycling.

[0062] In this embodiment, the RTO waste gas treatment system 5 is a regenerative waste gas treatment device that can use the heat energy of waste gas combustion to treat waste gas. The pyrolysis non-condensable gas is a high-concentration organic gas. When treating high-concentration organic gas, no additional energy supplement is required, which can reduce the operating cost of waste gas treatment. The inlet of the regenerative waste gas treatment device is connected to the gas outlet of the oil and gas condensation recovery system 4 to introduce the pyrolysis non-condensable gas for incineration treatment. The tail outlet is connected to the absorption chilled water supply system to produce the chilled water required for cooling the oil and gas condensation recovery system 4.

[0063] In this embodiment, the absorption chilled water supply system 6 uses thermal energy to generate chilled water. The exhaust gas discharged from the RTO exhaust gas treatment system 5 contains a large amount of thermal energy, which can be connected to the absorption chilled water supply system 6 to absorb the thermal energy of the exhaust gas and convert it into the cooling chilled water required by the oil and gas condensation recovery system 4 to improve the thermal energy recovery efficiency, reduce the gas emission temperature, and thus improve the equipment operating efficiency. After thermal energy recovery, the exhaust gas can be directly discharged through the chimney.

[0064] In this embodiment, the molten salt storage and replenishment system 7 includes a molten salt storage and replenishment tank, a molten salt supply pump, and a molten salt return filter 73. A molten salt heater is located below the molten salt storage and replenishment tank, with a molten salt outlet on the lower side, a molten salt outlet and a molten salt return port on the upper side, and a molten salt inlet 72 on the upper side. The molten salt outlet is connected to the hot molten salt inlet 14 of the molten salt reaction tank via the molten salt pump. The molten salt inlet 72 is used to introduce solid molten salt into the molten salt storage and replenishment tank, where it is heated by the molten salt heater to melt and convert into liquid molten salt. This liquid molten salt is then introduced into the molten salt reaction tank 10 via the molten salt circulation pump. Overflowing molten salt flows back through the hot molten salt overflow outlet 15 of the molten salt reaction tank, and after passing through the molten salt return filter 73, it enters the molten salt storage and replenishment tank. The closed molten salt reaction tank 10 has a molten salt reaction tank discharge outlet 16 at the rear bottom, which can be opened by the molten salt discharge valve V3 and the molten salt in the molten salt reaction tank 10 is led back to the molten salt storage replenishment tank through the molten salt return filter 73. The molten salt return filter 73 is mainly used to filter out the pyrolysis carbon slag and impurities 18 of the pyrolysis reaction to avoid contaminating the molten salt and affecting the pyrolysis reaction. The molten salt circulation pump mainly provides the function of hot molten salt circulation, replenishes the molten salt carried out with the pyrolysis reaction products, maintains a fixed amount of molten salt so that the pyrolysis reaction can continue.

[0065] In this embodiment, the nitrogen generation and supply system separates nitrogen and oxygen by passing compressed air through a molecular sieve to obtain high-purity nitrogen. This high-purity nitrogen is used to provide the nitrogen required for deoxygenation before the operation of the sealed molten salt reaction system 1. The more nitrogen input, the better the oxygen reduction effect, providing effective molten salt pyrolysis deoxygenation. The nitrogen from the nitrogen generation and supply system is temporarily stored in a storage tank and introduced into the sealed molten salt reaction system through a control valve to perform deoxygenation within the sealed molten salt reaction system. The nitrogen is then led out of the system through the exhaust outlet of the sealed molten salt reaction system, thus achieving the purpose of deoxygenation.

[0066] This invention utilizes a sealed molten salt reaction system 1 as a tool for generating a thermal decomposition reaction of reactants: the sealed molten salt reaction system 1 provides space for the molten salt to contact the reactants to generate a thermal decomposition reaction, the thermal decomposition reaction time, and the thermal decomposition gas 19 generated by the thermal decomposition reaction to be temporarily stored. When the temperature of the molten salt is above the melting point, it will form a liquid, providing the heat energy required for the thermal decomposition reaction. The liquid molten salt can quickly and fully contact the reactants and heat them uniformly. During the thermal decomposition reaction, it can penetrate the reactants more effectively, thereby accelerating the thermal decomposition reaction. The front water seal trough 11 and the rear water seal trough 12 serve as freely movable sealing gates at the front and rear of the sealed molten salt reaction system 1. The water penetration force and water pressure of the front water seal trough 11 force the air entrained by the reactants introduced into the movable reaction frame 3 to be expelled and prevented from entering the sealed molten salt reaction system 1. Upon passing through the rear water seal trough 12, the water pressure forces the thermal decomposition gas 19 entrained by the thermal decomposition reaction products out of the sealed molten salt reaction system 1, leaving it within the internal space of the sealed molten salt reaction system 1. The front and rear water seal troughs 12 form effective freely movable sealing gates, unrestricted by changes in the shape and space of the reactants and thermal decomposition reaction products. They can easily block the entry and exit of gas, achieving effective micro-pressure isolation, thereby maintaining the sealing of the molten salt reaction system and ensuring the safety of the molten salt thermal decomposition reaction. Meanwhile, the rear water seal tank 12 has the function of stopping the thermal decomposition reaction. When the thermal decomposition reactants are removed, the rear water seal tank 12 can cool down the thermal decomposition reactants to stop the thermal decomposition reaction, so that the removed thermal decomposition reaction products can safely stop the reaction and avoid the hazards of thermal decomposition gas generated by the continued reaction.

[0067] The suspended track-mounted conveyor system 2 is used as the means of transporting reactants and pyrolysis reaction products into and out of the sealed molten salt reaction system 1. The suspended track-mounted conveyor system 2 can be installed according to the production layout, ensuring clear pathways and space for the conveying route (up, down, left, right). When the suspended conveyor track 21 passes through the front water seal tank 11 and the rear water seal tank 12 within the water seal tank, it prevents air entrained by the reactants and pyrolysis gas 19 entrained by the pyrolysis reaction products from entering through water compression. This also maintains a slight pressure seal between the sealed molten salt reaction system 1 and the external space. Both the front water seal tank 11 and the rear water seal tank 12 form movable liquid gates, effectively establishing a slight pressure seal for the pyrolysis reaction space and allowing the reactants and pyrolysis reaction products to flow smoothly, achieving continuous transport. The rear water seal tank 12 has a function to stop the pyrolysis reaction; when the pyrolysis reaction products are removed, the rear water seal tank 12... The water seal tank 12 can cool down the products of the pyrolysis reaction, stop the pyrolysis reaction, and ensure that the removed products of the pyrolysis reaction can completely stop the reaction, thus eliminating the hazards of pyrolysis gases. The suspended track-mounted conveyor system 2 is installed above the molten salt reaction tank 10, allowing the reactants to be immersed in the molten salt for heating along with the movable reaction frame assembly 3, further generating a pyrolysis reaction. This reaction takes place on the reactants within the movable reaction frame assembly 3. After the pyrolysis reaction, the products of the pyrolysis reaction are still within the movable reaction frame assembly 3, and are transported and displaced by the suspended track-mounted conveyor system 2. The time that the reactants remain in the molten salt reaction tank 10 is the pyrolysis reaction time. The pyrolysis reaction time can be controlled by the suspended track-mounted conveyor system 2. When the time needs to be extended, the conveying speed is reduced to meet the extended pyrolysis reaction time. By linking the circulating conveying speed with the pyrolysis reaction time, the purpose of controllable operation can be easily achieved.

[0068] The movable reaction frame assembly 3 serves as a moving carrier for reactants and pyrolysis reaction products. Since the specific gravity of reactants and pyrolysis reaction products is less than that of molten salt, they will float on the surface of molten salt. To solve the problem that reactants and pyrolysis reaction products will float in molten salt and cannot be heated as a whole in molten salt, the movable reaction frame assembly 3 is needed. The reactants are introduced into molten salt along with the movable reaction frame assembly 3 for heating to produce a pyrolysis reaction. The movable reaction frame assembly 3 can be easily hung on the conveying system and can effectively carry reactants and pyrolysis reaction products. The reactants can be moved into molten salt for pyrolysis reaction, and the pyrolysis reaction products can be directly removed for recycling after the pyrolysis reaction.

[0069] The oil and gas condensation recovery system 4 is used as a tool for recovering thermal cracked oil: the thermal cracking reaction of polymer materials will produce a large amount of thermal cracked gas 19. This thermal cracked gas 19 can be cooled by the thermal cracked gas condensation system. Most of it condenses to form thermal cracked oil 191, which can be further recycled. A small part is non-condensable gas. In addition to using general commercial chillers, the oil and gas condensation recovery system 4 can also use the absorption chilled water supply system 6 to convert the waste heat of the exhaust gas into cooling chilled water for condensation, so as to reduce energy consumption and improve operating efficiency.

[0070] Using RTO waste gas incineration system as a tool for treating pyrolysis non-condensable gases: RTO waste gas incineration system is a regenerative waste gas treatment system that can effectively utilize the heat energy of waste gas for incineration. It does not require additional energy for the treatment of high-concentration organic waste gas. Compared with the pyrolysis gas19 produced by molten salt pyrolysis reaction, it is still a high-concentration pyrolysis non-condensable organic gas after condensation, which can be directly introduced into RTO waste gas incineration system. Its operation does not require additional energy, which can reduce energy consumption and improve operating efficiency.

[0071] The absorption chilled water supply system 6 is used as a tool for recovering waste heat from exhaust gas treatment: The absorption chilled water supply system 6 operates using thermal energy and can use the waste heat from exhaust gas treatment to cool chilled water production. On the one hand, it reduces the exhaust gas emission temperature, and on the other hand, it can generate chilled water for cooling, thereby achieving the purpose of energy recovery and improving operational efficiency.

[0072] The molten salt storage and replenishment supply system 7 is used as a tool for storing and replenishing molten salt in the sealed molten salt reaction system 1. In the sealed molten salt reaction system 1, molten salt replenishment must be done externally without damaging the original enclosed space. Therefore, the molten salt storage and replenishment supply system 7 is designed to preheat the molten salt to form liquid molten salt, which is then replenished to the molten salt reaction tank 10 by a molten salt circulation pump. The molten salt then overflows back to the molten salt storage and replenishment supply system 7, providing a fixed amount of molten salt to the molten salt reaction tank 10. This effectively replenishes the molten salt lost in the molten salt thermal decomposition reaction and also ensures that the molten salt reaction tank 10 has sufficient storage space when the molten salt is discharged and returned, thus realizing the functions of molten salt transfer in and out.

[0073] A nitrogen generation and supply system is used as a deoxygenation tool in the sealed molten salt reaction system 1: This nitrogen generation and supply system can provide high-purity nitrogen, which can be introduced into the sealed molten salt reaction system through a gas control tube. It can squeeze out the air in the space of the sealed molten salt reaction system before the molten salt thermal decomposition reaction, reduce the oxygen content, prevent combustion, and meet the thermal decomposition requirements.

[0074] This invention establishes energy-saving measures for a molten salt thermal pyrolysis reaction system, enabling the waste gas incineration treatment to utilize the thermal energy of the non-condensable thermal pyrolysis gas 19. Furthermore, the thermal energy of the exhaust gas can be converted into ice water through an absorption refrigeration system, which can be used as cooling water for the oil-gas separation and condensation system, thus making full use of energy and further improving operational efficiency.

[0075] like Figure 4 As shown, the present invention also provides a method for establishing a continuous reaction of molten salt thermal pyrolysis, the method being as follows:

[0076] (1) Using a sealed molten salt reaction system as a tool to generate a thermal pyrolysis reaction;

[0077] (2) Use a suspended fixed-track conveyor system as a means of transporting reactants and thermal decomposition reaction products into and out of a sealed molten salt reaction system;

[0078] (3) Use the movable reaction rack as a moving carrier for reactants and thermal decomposition reaction products;

[0079] (4) Use the oil and gas condensation recovery system as a tool for recovering thermal cracked oil;

[0080] (5) Use the RTO waste gas incineration system as a tool for treating non-condensable gases from thermal decomposition.

[0081] (6) Use an absorption chilled water supply system as a tool for recovering waste heat from exhaust gas in waste gas treatment.

[0082] (7) Utilize the molten salt storage and replenishment supply system as a tool for storing and replenishing molten salt in a sealed molten salt reaction system;

[0083] (8) Use the nitrogen generation and replenishment system as a deoxygenation tool in the space of the sealed molten salt reaction system.

[0084] A method for establishing a continuous reaction of molten salt thermal pyrolysis includes the following specific steps:

[0085] Step S0: Before starting the molten salt pyrolysis continuous reaction system, complete the pre-operation preparations:

[0086] (1) Start the absorption chilled water supply system to circulate the chilled water for condensation and cooling;

[0087] (2) Start the RTO exhaust gas treatment system;

[0088] (3) Start the molten salt storage and replenishment supply system 7, introduce the prepared molten salt into the molten salt storage and replenishment supply tank 71 through the molten salt inlet 72, start the molten salt heater H0, melt the molten salt into liquid molten salt and reach the temperature required for thermal decomposition, further turn on the reaction tank heater H1 of the molten salt reaction tank 10 to preheat the molten salt reaction tank 10 to prevent the molten salt 17 from cooling and clumping, after the reaction tank heater H1 has finished preheating, start the molten salt circulation pump P to circulate the molten salt 17; replenish the water in the front water seal tank 11 and the rear water seal tank 12 by introducing clean water WO so that the isolation plate 13 and the suspended conveying track 21 are deep under the water seal, so that the sealed molten salt reaction system 1 is completely isolated from the external space; introduce compressed air Air into the nitrogen generation and replenishment supply system 8, the molecular sieve draws out oxygen O2 and leaves nitrogen N2, and then introduces nitrogen N2 into the top of the molten salt reaction tank 10.

[0089] Step S1: Deoxidation is carried out in a sealed molten salt reaction system;

[0090] The nitrogen N2 introduced into the sealed molten salt reaction system will squeeze out the air originally present in the space of the sealed molten salt reaction system 1, and enter the oil and gas condensation recovery system 4. After further passing through the RTO waste gas treatment system 5 and the absorption chilled water supply system 6, it will be discharged. The RTO waste gas treatment system 5 is turned on to prepare for operation before treatment. When the incineration temperature is reached, the waste gas can be treated.

[0091] Step S2: The movable reaction frame assembly is introduced into the molten salt of the molten salt reaction tank through a suspended conveyor track for heating and thermal decomposition reaction;

[0092] To prepare for the operation of the suspended track-mounted conveyor system 2, the suspended conveyor motor M is started for a conveying operation test. Reactant A is placed on the movable reaction frame assembly 3, and then the suspended track-mounted conveyor system 2 is attached. The suspended conveyor motor M starts running, pulling the track-mounted rolling pulley forward, allowing the movable reaction frame assembly 3 containing reactant A to advance towards the water seal trough 11. As it passes through the water seal trough 11, the movable reaction frame assembly 3 descends along the suspended conveyor track 21 into the water seal. The water in the water seal trough 11 will squeeze out any air trapped in reactant A in the movable reaction frame assembly 3, eliminating the risk of air introduction during reactant A introduction. After passing through the water seal, it rises along the suspended conveyor track 21 above the molten salt reaction tank 10, and is further secured by the suspended conveyor track 21 to guide the movable reaction frame assembly 3 into the molten salt reaction tank 10. The molten salt 17 undergoes heating and thermal decomposition reaction. The thermal decomposition gas 19 rises into the oil and gas condensation and recovery system 4. Its thermal decomposition time is the same as the travel time of the molten salt reaction tank 10 in the suspended rail conveying system 2. After the reaction, it rises and falls with the suspended conveying track 21 and is introduced into the rear water seal tank 12. The water in the rear water seal tank 12 will squeeze out the thermal decomposition gas 19 from the removed thermal decomposition reaction product B, and at the same time cool the thermal decomposition reaction product B, so that the thermal decomposition reaction product B in the movable reaction frame group 3 stops the thermal decomposition reaction and can be safely removed to the workplace where the movable reaction frame group 3 is removed, thus completing the thermal decomposition reaction process. The continuous reaction operation can be achieved by continuously conveying reactant A into the sealed molten salt reaction system 1 and continuously removing thermal decomposition reaction product B.

[0093] In step S3, the thermally decomposed gas 19 is introduced into the oil and gas condensation recovery system 4, and the circulating condensing cooling water WL is introduced to allow the thermally decomposed gas 19 to cool down rapidly and form thermally decomposed oil 191. This oil flows down the condenser to the lower end of the oil and gas condensation recovery system 4 and is then led out of the system through a control valve. The condensed non-condensable thermally decomposed gas 192 is introduced into the RTO waste gas treatment system 5 for treatment. The non-condensable thermally decomposed gas 192 is incinerated by the RTO waste gas treatment system 5 and converted into harmless tail gas. The tail gas is then introduced into the downstream absorption chilled water supply system 6, where its heat energy can be converted into condensing cooling water WL, which is used as chilled water for cooling in the oil and gas condensation recovery. This reduces the tail gas emission temperature and increases the efficiency of heat energy recovery. The tail gas can then be discharged through the chimney.

[0094] This invention utilizes a suspended track-mounted conveyor system, a movable reaction frame, and a sealed molten salt reaction system. The track of the suspended track-mounted conveyor system is set within the water seal tanks before and after the sealed molten salt reaction system. This allows the reactants and gases entrained by the pyrolysis reaction products to remain in the original space, while the water seal tanks form a freely movable gate. This allows reactants and pyrolysis reaction products to pass through while preventing entrained gases from passing through, effectively blocking the introduction of air and the leakage of pyrolysis gas. This establishes a sealed molten salt reaction system space, enabling the continuous insertion of reactants at the front end and the continuous removal of pyrolysis reaction products at the rear end, effectively blocking the entry and exit of gases and achieving the goal of continuous pyrolysis reaction operation.

[0095] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the technical scope of the present invention. Therefore, any minor modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A method for establishing a continuous reaction system for molten salt thermal pyrolysis, characterized in that, This includes a sealed molten salt reaction system, a suspended rail conveying system, a mobile reaction frame assembly, an oil and gas condensation and recovery system, an RTO waste gas treatment system, an absorption chilled water supply system, a molten salt storage and replenishment supply system, and a nitrogen generation and replenishment supply system; among which, The movable reaction frame assembly is connected to the suspended track-mounted conveying system and is used to carry the reactants; The suspended track-mounted conveyor system is used to move the reactants mounted on the movable reaction frame through the sealed molten salt reaction system. The sealed molten salt reaction system is used to heat and thermally decompose the reactants to generate thermal decomposition products and thermal decomposition gas. The thermal decomposition gas rises and enters the oil and gas condensation and recovery system. The oil and gas condensation and recovery system is used to rapidly cool the pyrolysis gas to form pyrolysis oil, which flows down the condenser to the lower end of the oil and gas condensation and recovery system. The condensed non-condensable pyrolysis gas is introduced into the RTO waste gas treatment system through the outlet for treatment. The RTO exhaust gas treatment system incinerates the non-condensable pyrolysis gas and converts it into harmless tail gas, which is then introduced into an absorption chilled water supply system. The absorption chilled water supply system is used to convert the thermal energy of the exhaust gas into condensed cooling water. The molten salt storage and replenishment system is used to replenish the molten salt carried out with the products of the pyrolysis reaction, and maintain a fixed amount of molten salt so that the pyrolysis reaction can continue. The nitrogen generation and supply system provides the nitrogen required for deoxygenation before the operation of the sealed molten salt reaction system. The sealed molten salt reaction system includes a molten salt reaction tank, a front water seal tank, a rear water seal tank, and an isolation plate. The front and rear water seal tanks are respectively located at the front and rear ends of the molten salt reaction tank. A molten salt reaction tank heater is located below the molten salt reaction tank, a hot molten salt inlet is located above the front end, and a hot molten salt overflow outlet is located above the rear end. The overflowing molten salt flows back to the molten salt storage and replenishment tank. A molten salt discharge valve is located at the bottom of the rear end to drain the molten salt from the molten salt reaction tank and return it to the molten salt storage and replenishment tank. Both the front and rear water seal tanks adopt a concave barrier design. The water seal reaches a fixed water level through the front and rear water seal inlet valves. An isolation plate is provided between the front and rear water seal tanks to create two spaces within the water seal. The suspended track conveying system includes a conveying motor, a conveying chain, and a suspended conveying track. The suspended conveying track passes sequentially through the front water seal tank, above the molten salt reaction tank, and the rear water seal tank to form a closed loop. The conveying chain is driven by the conveying motor and travels along the suspended conveying track.

2. The method for establishing a continuous reaction system for molten salt pyrolysis as described in claim 1, characterized in that, The oil and gas condensation recovery system is connected to the exhaust gas outlet above the sealed molten salt reaction system, allowing pyrolysis gas to be introduced into the oil and gas condensation recovery system. After entering the oil and gas condensation system, the temperature of the pyrolysis gas is reduced. Most of the pyrolysis gas condenses into pyrolysis oil and is led out through the pyrolysis oil outlet below. A small portion is non-condensable pyrolysis gas, which is discharged through the condensate gas outlet and introduced into the downstream RTO exhaust gas treatment system for incineration into stable and harmless gas.

3. The method for establishing a continuous reaction system for molten salt thermal pyrolysis as described in claim 1, characterized in that, The RTO waste gas treatment system is a regenerative thermal condensate waste gas treatment device. The inlet of the regenerative thermal condensate waste gas treatment device is connected to the gas outlet of the oil and gas condensation recovery system, and the non-condensable gas from thermal cracking is introduced for incineration. The tail outlet is connected to an absorption chilled water supply system to produce chilled water for cooling the oil and gas condensation recovery system.

4. The method for establishing a continuous reaction system for molten salt pyrolysis as described in claim 1, characterized in that, The molten salt storage and replenishment system includes a molten salt storage and replenishment tank, a molten salt pump, and a molten salt reflux filter. The molten salt storage and replenishment tank has a molten salt heater at the bottom, a molten salt outlet on the lower side, a molten salt outlet and a molten salt reflux port at the top, and a molten salt inlet on the upper side. The molten salt outlet is connected to the hot molten salt inlet of the molten salt reaction tank via the molten salt pump. The molten salt inlet is used to introduce solid molten salt into the molten salt storage and replenishment tank, where it is heated by the molten salt heater to melt and convert into liquid molten salt. This liquid molten salt is then pumped into the molten salt reaction tank. Overflowing molten salt flows back through the hot molten salt overflow outlet of the molten salt reaction tank, passes through the molten salt reflux filter, and then enters the molten salt storage and replenishment tank.

5. The method for establishing a continuous reaction system for molten salt thermal pyrolysis as described in claim 1, characterized in that, The nitrogen generation and supply system separates nitrogen and oxygen by passing compressed air through a molecular sieve to obtain high-purity nitrogen, which is used to provide the nitrogen required for deoxygenation before the operation of the sealed molten salt reaction system. The nitrogen from the nitrogen generation and supply system is temporarily stored in a storage tank and introduced into the sealed molten salt reaction system through a control valve to carry out deoxygenation operations within the sealed molten salt reaction system.

6. A method for establishing a continuous reaction of molten salt thermal pyrolysis, characterized in that, The method for establishing a continuous molten salt thermal pyrolysis reaction system as described in any one of claims 1-5 is as follows: (1) Using a sealed molten salt reaction system as a tool for generating thermal decomposition reaction of reactants; (2) Use a suspended fixed-track conveyor system as a means of transporting reactants and thermal decomposition reaction products into and out of a sealed molten salt reaction system; (3) Use the movable reaction frame assembly as a moving carrier for reactants and thermal decomposition reaction products; (4) Use the oil and gas condensation recovery system as a tool for recovering thermal cracked oil; (5) Use the RTO waste gas treatment system as a tool for treating non-condensable gases from thermal decomposition; (6) Use an absorption chilled water supply system as a tool for recovering waste heat from exhaust gas during waste gas treatment; (7) Utilize the molten salt storage and replenishment supply system as a tool for storing and replenishing molten salt in a sealed molten salt reaction system; (8) Use the nitrogen generation and replenishment system as a deoxygenation tool in the space of the sealed molten salt reaction system.

7. The method for establishing a continuous reaction of molten salt thermal pyrolysis as described in claim 6, characterized in that, The specific steps include the following: Step S1: Deoxidation is carried out in a sealed molten salt reaction system; The nitrogen introduced into the sealed molten salt reaction system displaces the air that was originally in the space of the sealed molten salt reaction system, and then enters the oil and gas condensation recovery system, RTO waste gas treatment system and absorption chilled water supply system in sequence before being discharged; the RTO waste gas treatment system is turned on to prepare for operation before treatment, and waste gas treatment can be carried out when the incineration temperature is reached. Step S2: The movable reaction frame assembly is introduced into the molten salt of the molten salt reaction tank through a suspended conveyor track for heating and thermal decomposition reaction; To prepare for the operation of the suspended rail-mounted conveyor system, the suspended conveyor motor is started for a conveying operation test. The reactants are placed on the movable reaction frame assembly, which is then hung on the suspended rail-mounted conveyor system. The suspended conveyor motor is started, pulling the rail-mounted rolling pulleys clockwise, continuously moving forward, allowing the movable reaction frame assembly containing the reactants to advance into the water seal trough. As it passes through the water seal trough, the movable reaction frame assembly descends with the suspended conveyor track into the water seal. The water in the water seal trough will squeeze out the air entrained in the reactants in the movable reaction frame assembly. After passing through the water seal, it rises with the suspended conveyor track above the molten salt reaction tank. The movable reaction frame assembly is then introduced into the molten salt of the molten salt reaction tank via the suspended conveyor track for heating and... In the pyrolysis reaction, the pyrolysis gas rises into the oil and gas condensation and recovery system. Its pyrolysis time is the same as the travel time of the molten salt reaction tank in the suspended rail conveyor system. After the reaction, it rises and falls along the suspended conveyor track and is introduced into the rear water seal tank. The water in the rear water seal tank will squeeze out the pyrolysis gas from the removed pyrolysis reaction products and cool the pyrolysis reaction products, so that the pyrolysis reaction products removed from the movable reaction frame group stop the pyrolysis reaction, are safely removed and sent to the workplace where the movable reaction frame group is removed, and the pyrolysis reaction process is completed. By continuously conveying reactants into the sealed molten salt reaction system, pyrolysis reaction products can be continuously removed to achieve continuous reaction operation. In step S3, the pyrolysis gas generated by the pyrolysis reaction is introduced into the oil and gas condensation recovery system. Circulating cooling water is introduced to rapidly cool the pyrolysis gas, forming pyrolysis oil that flows down the condenser to the lower end of the oil and gas condensation recovery system and is then led out through a control valve. The condensed non-condensable pyrolysis gas is introduced into the RTO waste gas treatment system for treatment. The non-condensable pyrolysis gas is incinerated by the RTO waste gas treatment system and converted into harmless tail gas. The tail gas is then introduced into the downstream absorption chilled water supply system, where its thermal energy is converted into cooling water for use in the oil and gas condensation recovery system. Subsequently, the tail gas is discharged through a chimney.

8. The method for establishing a continuous reaction of molten salt thermal pyrolysis as described in claim 7, characterized in that, Before step S1, the process also includes step S0, which involves completing pre-operation preparations before starting the molten salt pyrolysis continuous reaction system. (1) Start the absorption chilled water supply system to circulate the chilled water for condensation and cooling; (2) Start the RTO exhaust gas treatment system; (3) Start the molten salt storage and replenishment supply system, introduce the pre-prepared molten salt into the molten salt storage and replenishment supply tank through the molten salt inlet, start the molten salt heater to melt the molten salt into liquid molten salt and reach the temperature required for thermal decomposition, turn on the reaction tank heater of the molten salt reaction tank to preheat the molten salt reaction tank to prevent the molten salt from cooling and clumping, and start the molten salt pump to circulate the molten salt after the reaction tank heater has finished preheating; replenish the front water seal tank and the rear water seal tank with clean water so that the isolation plate and the suspended conveying track are deep under the water seal, so that the sealed molten salt reaction system is completely isolated from the external space; introduce compressed air into the nitrogen generation replenishment supply system, the molecular sieve draws out the oxygen and leaves the nitrogen, and then introduces the nitrogen into the top of the molten salt reaction tank.

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