552 results about "Pyrolysis oil" patented technology

The invention belongs to the technical field of petroleum processing, and particularly relates to a catalyst and a preparation method and application thereof. The raw materials of the catalyst comprise a metal active component, a carrier and an auxiliary agent, the metal active component is sulfides of Mo and Ni elements, the carrier is spherical gamma-Al2O3 of 0.5-1 mm, and the auxiliary agent is P; the carrier is modified by using the metal active component and the auxiliary agent to serve as the catalyst. The high-activity catalyst is synthesized by adopting the strategy of changing the roasting temperature, adding the additive for doping modification and changing the molar ratio of metal active components, the additive is combined with surface aluminum atoms, the framework strength is enhanced, pore channel collapse caused by acid / water erosion is reduced, the water resistance and acid resistance of the catalyst are improved, and the catalytic reaction activity is further improved. The catalyst disclosed by the invention is accurate and controllable in structure, can be synthesized in batches, and can be applied to the co-catalytic hydrogenation process of biomass pyrolytic oil and / or a model compound thereof and petroleum distillate oil and / or VR.

A pyrolysis method and system are provided that enhances the production of alkanes and minimizes the production of aromatics in the resulting pyrolysis oil. More particularly, the disclosed pyrolysis method and system may be configured to enhance the production of alkanes due to the use of certain pyrolysis catalysts and more intense pyrolysis conditions.

Embodiments of the present disclosure relate to a method and system for producing refined hydrocarbons from waste plastic pyrolysis oil. The method and system for producing refined hydrocarbons from waste plastic pyrolysis oil according to the embodiments of the present disclosure may minimize formation of an ammonium salt (NH4Cl) and may prevent an adhesion phenomenon of impurity particles in a reactor in a refining process of waste plastic pyrolysis oil containing impurities including chlorine and nitrogen. In addition, the method and system for producing refined hydrocarbons according to the embodiments of the present disclosure may have excellent refining efficiency and may implement a long-term operation of a process because deactivation of a catalyst used in the process is prevented, and may produce refined hydrocarbons having a low content of impurities and a low content of olefins from waste plastic pyrolysis oil.

The invention discloses a cyclone separation and moving particle bed coupled pulverized coal pyrolysis oil gas high-temperature dust removal system, and belongs to the technical field of coal clean utilization. The system comprises a cyclone separator, a fine filtration unit, a filter material cyclic regeneration unit and an intelligent control unit, the fine filtration unit comprises a particle bed, a particle bin is arranged at the top end of the particle bed, and a composite filter material layer is arranged on the particle bed; a dust-containing high-temperature oil gas pipeline and a pretreatment high-temperature oil gas pipeline are arranged at the top end of the cyclone separator, dust-containing high-temperature oil gas is introduced into the cyclone separator through the dust-containing high-temperature oil gas pipeline to be pretreated, and the pretreated dust-containing high-temperature oil gas is introduced into the particle bed through the pretreatment high-temperature oil gas pipeline to be finely filtered; and a coke breeze discharge pipe is arranged at the bottom of the cyclone separator. The invention is used for solving the technical problem of low gas-solid separation efficiency at high temperature caused by the adoption of a single filter material in the existing pulverized coal dust removal system.

The invention relates to the technical field of carbon black materials, and discloses special carbon black with high specific surface area and a preparation method thereof, and the special carbon black is prepared by pyrolysis and activation treatment of a precursor mixture, a catalyst and a template agent. The precursor mixture contains a biomass refined product, waste polymer pyrolysis oil and a copolymer template agent, and the performance is optimized through a rotating flow field high-temperature reactor and a microwave-assisted activation process. The carbon black has a hierarchical porous structure, the specific surface area reaches 2000-2500m < 2 > / g, the conductivity is improved by 1-2 orders of magnitude, and the chemical properties can be regulated and controlled through surface functionalization. The low-cost and sustainable production is realized, the mechanical strength, the conductivity and the adsorption performance are remarkably improved, and the requirements of the high-end field are met.

The present invention discloses a pyrolysis oil and gas cutting device and method, comprising a waste rubber pellet pyrolysis module, a pyrolysis oil and gas high-efficiency cutting module, a pyrolysis oil and gas condensation module, a Roots blower, a non-condensable gas pressure-stabilizing and conveying module, and a control module. By spraying cooling water and circulating non-condensable gas onto the high-temperature pyrolysis oil and gas, the present invention utilizes the vaporization of the cooling water to absorb a large amount of latent heat of phase change, fully condensing the high-temperature pyrolysis oil and gas. Furthermore, the generated water vapor and non-condensable gas reduce the partial pressure of low-flash-point components in the oil and gas, causing them to continuously migrate from the liquid phase to the gas phase. While ensuring that the oil product flash point meets standards, the minimum flash point cutting temperature required for condensation of high-flash-point oil is lowered, thereby increasing the yield of high-flash-point oil.

The invention relates to an oil-rich coal in-situ underground combustion and pyrolysis oil and gas recovery cooperative system based on high-temperature heat pipes. The system comprises a vertical shaft, a horizontal drill hole and a high-temperature heat pipe set. A high-temperature heat pipe set is arranged on the coal seam of the vertical shaft. A plurality of vertical wells are arranged with the vertical well as the center. Each vertical well is communicated with two parallel horizontal drill holes with different depths in the coal seam, the horizontal drill holes communicated with the adjacent vertical wells are not at the same depth of the coal seam, and four horizontal drill hole groups with different depths are arranged in the coal seam. Oxygen and carbon dioxide are mixed into oxygen-enriched gas, and combustion of coal in a certain horizontal drill hole is achieved. Flue gas generated by coal combustion is subjected to heat exchange through the high-temperature heat pipe set, and water vapor or carbon dioxide is heated. The high-temperature water vapor or carbon dioxide and the high-temperature flue gas after heat exchange enter the other two horizontal drill holes in the coal seam respectively, coal is pyrolyzed, and pyrolysis gas and tar are generated. According to the system, high-quality tar and high-calorific-value pyrolysis gas can be obtained, and only a small amount of energy needs to be provided from the outside.

The invention belongs to the field of wind power, and relates to a waste wind power blade pyrolysis system and method. The system comprises a pyrolysis device, a combustion device, a carbon removal device and a gas return pipe, wherein the internal space of the pyrolysis device can receive external third gas to pyrolyze the blades, output pyrolysis solids to the carbon removal device and output pyrolysis oil gas to the combustion device; the external space of the pyrolysis device heats the internal space by using the first gas, and outputs a second gas; the combustion device is used for receiving and combusting pyrolysis oil gas and air and outputting first gas to an external space; the carbon removal device is used for receiving the pyrolysis solid and the carbon removal gas, removing residual carbon of the pyrolysis solid and then outputting glass fibers to the outside; the gas return pipe is connected with the internal space, and part of the second gas serves as third gas to be fed into the internal space. The blades are heated in a radiation and convection mode, the amount of smoke fed into the pyrolysis device can be adjusted, the pyrolysis process is stable, fiber strength loss is avoided, and the energy utilization rate is increased.

Processes and systems for making recycle content hydrocarbons, including olefins, from recycled waste material. Recycle waste material may be pyrolyzed to form recycle content pyrolysis oil composition (r-pyoil), at least a portion of which may then be cracked to form a recycle content olefin composition (r-olefin). The r-olefin may then be further separated into product streams in a separation zone downstream of the cracker furnace. The presence of recycle content hydrocarbons may facilitate more efficient operation of one or more distillation columns in the separation zone, including the propylene fractionator.

The invention discloses a device for preparing a molten carbon fertilizer through solid waste microwave pyrolysis and waste heat recovery, and belongs to the field of solid waste treatment and recycling. The device is composed of a pretreatment unit, a microwave pyrolysis unit, a gas-solid separation unit, a gas phase treatment unit, a solid phase treatment unit and a waste heat circulation unit, solid waste enters a microwave rotary kiln after being dried and crushed, a magnetron generates microwave anaerobic pyrolysis under photovoltaic power supply, and a high-temperature gas-solid product is generated; the cyclone separator is used for separating flue gas from solid carbon, the flue gas is condensed to obtain pyrolytic oil and gas, and waste heat of medium-temperature flue gas is recovered through the heat accumulating type heat exchanger for drying; cooling the solid carbon through a heat pipe heat exchanger, recovering waste heat and liquefying urea, and mixing the solid carbon and the urea in a stirring melting pool to prepare a molten carbon fertilizer; and the waste heat backflow fan sends the carbon waste heat back to the drying chamber. The system is driven by green electricity, gas and solid phase waste heat is recovered through double paths, solid waste efficient pyrolysis-product high value-energy self-circulation is achieved, and energy consumption and carbon emission are reduced.

The present application belongs to the technical field of cracking and dechlorination of chlorinated mixed plastics, and particularly relates to a preparation method of a red mud-based chlorinated mixed plastic pyrolysis composite dechlorination agent and a dechlorination method. First, the coffee grounds are converted into biochar through a hydrothermal carbonization reaction, and at the same time, the reducing gas released during the carbonization of the coffee grounds is used to reduce part of the hematite in the red mud to Fe3O4; then, through a high-temperature carbon thermal reaction, the residual hematite in the red mud is completely reduced to Fe3O4, and at the same time, the composite with the added CaO is realized, and finally, the composite dechlorination agent composed of the modified red mud, the biochar and the CaO is obtained. The dechlorination agent has a suitable specific surface area and an adjustable pore structure, can effectively fix HCl during the cracking of chlorinated mixed plastics, and can further obtain plastic pyrolysis oil with ultra-low chlorine content, and realize the high-value utilization of the red mud and coffee grounds solid waste.

The invention provides a method for preparing pigment carbon black from waste tires, which solves the problems of low product quality and resource waste in traditional waste tire treatment by optimizing a synergistic process of thermal cracking, oxidation modification, pyrolysis oil carbonization and tail gas closed-loop utilization. The method comprises the following specific steps: crushing the waste tires into rubber powder, and performing thermal cracking to generate a carbon residue and oil-gas mixture; carrying out magnetic separation, grinding and oxidation treatment on the carbon residues to generate oxidized carbon black; fractionating and refining the pyrolysis oil, mixing with carbon black oil, and spraying into a carbon black reaction furnace to generate carbon black; and finally, mixing and granulating the two parts of carbon black to prepare the pigment carbon black. The specific surface area of the prepared pigment carbon black reaches 80-200 m < 2 > / g, the coloring strength is 80-120%, the ash content is smaller than or equal to 18%, and the pigment carbon black can be applied to color master batches and black plastic products by limiting thermal cracking conditions, oxidation conditions and the ratio of mixed oil. The tail gas is recycled after being dedusted and purified, so that efficient cyclic utilization of resources is realized.

The invention belongs to the technical field of petroleum processing, and particularly relates to a preparation method and application of a catalyst. The catalyst comprises a metal active component and a molecular sieve, a metal complex is added in situ in the synthesis process of the molecular sieve, anchoring of metal in a molecular sieve cage is realized by using a confinement effect in the molecular sieve cage, sub-nanometer approaching of a metal site and an acid site is realized, and the synergistic effect of the metal site and the acid site is improved; the catalytic cracking catalyst is used for synergistic catalytic cracking of biomass pyrolytic oil and petroleum distillate oil. The high-activity confinement type catalyst is synthesized, the synthesis time of the catalyst is greatly shortened by adding the metal complex while the HY molecular sieve is synthesized, the original crystal structure is kept, metal dispersion is promoted, and the catalytic reaction activity is improved. The catalyst provided by the invention is simple and controllable in active component loading capacity and size, and can be applied to the co-catalytic cracking process of biomass pyrolytic oil and / or a model compound thereof and petroleum distillate oil and / or VGO.

The present disclosure relates to a method and system for producing refined hydrocarbons from waste plastic pyrolysis oil. The method and system for producing refined hydrocarbons from waste plastic pyrolysis oil according to the present disclosure may minimize formation of an ammonium salt (NH4Cl) and may prevent an adhesion phenomenon of impurity particles in a reactor in a refining process of waste plastic pyrolysis oil containing impurities including chlorine and nitrogen. In addition, the method and system for producing refined hydrocarbons according to the present disclosure may have excellent refining efficiency and may implement a long-term operation of a process because deactivation of a catalyst used in the process is reduced or prevented, and may produce refined hydrocarbons having a low content of impurities and a low content of olefins from waste plastic pyrolysis oil.

A composition having a recycle content value is obtained by reacting a recycle content feedstock to make a recycle content alpha olefin or by deducting from a recycle inventory a recycle content value applied to an alpha olefin composition. At least a portion of the recycle content value in the feedstock or in an allotment obtained by an alpha olefin manufacturer has its origin in recycled waste and / or pyrolysis of recycled waste and / or in thermal steam cracking of recycle content pyoil.

A composition having a recycle content value is obtained by reacting a recycle content feedstock to make a recycle content oxo alcohol or oxo plasticizer or by deducting from a recycle inventory a recycle content value applied to an oxo alcohol or oxo plasticizer composition. At least a portion of the recycle content value in the feedstock or in an allotment obtained by an oxo alcohol or oxo plasticizer manufacturer has its origin in recycled waste and / or pyrolysis of recycled waste and / or in thermal steam cracking of recycle content pyoil.

The invention discloses an artificial geothermal reservoir construction and development method based on oil shale reverse oxidation, and belongs to the technical field of resource exploitation, the method comprises the following steps: reservoir well construction: arranging an injection well, an exploitation well and a heat recovery well in a target layer section; an initial high-temperature environment is formed through manual heating, so that the oil shale is pyrolyzed to generate fixed carbon; injecting air to form an oxygen-enriched environment, initiating a fixed carbon oxidation self-heating reaction, and continuously pyrolyzing the oil shale; terrestrial heat is exploited through a circulating working medium, the air flow and components are dynamically controlled, and temperature control and safe operation are achieved; and finally reinjecting and sealing the carbon dioxide. The device can convert low-grade oil shale into clean geothermal energy, and has the advantages of energy conservation and environmental protection.

The application discloses a device and method for preparing green hydrogen through biomass pyrolysis and gasification, relates to the technical field of green hydrogen preparation, and solves the problems of blockage and corrosion caused by ash melting and slagging in the pure oxygen gasification process, and the problem of low energy utilization rate. The device for preparing green hydrogen through biomass pyrolysis and gasification comprises a pyrolysis reaction device, and the pyrolysis reaction device comprises a pyrolysis reaction tank connected with a high-temperature heat carrier conveying spiral, a biomass raw material storage bin, a biomass raw material conveying spiral and a pyrolysis solid-phase product conveying spiral. In the application, biomass raw materials are converted into biochar and pyrolysis oil gas through pyrolysis technology, the biomass ash is effectively cut, and problems such as blockage and corrosion caused by ash melting and slagging in the pure oxygen gasification process are effectively avoided; the high-temperature pyrolysis oil gas is directly subjected to pure oxygen gasification reaction through gasification technology, the sensible heat and latent heat in the pyrolysis oil gas are fully utilized, and the energy utilization rate is high.

This invention relates to the field of petroleum refining and chemical engineering, and discloses a method for hydrogenating waste tire pyrolysis oil. The method includes the following steps: (1) in the presence of hydrogen, the waste tire pyrolysis oil raw material undergoes a gas-phase desulfurization reaction in a first gas-phase hydrogenation reactor to obtain a gas-phase desulfurization reaction product; (2) the gas-phase desulfurization reaction product is subjected to gas-liquid separation to obtain a gas-phase component and a liquid-phase component; (3) the liquid-phase component is pressurized and mixed with hydrogen, and then subjected to a liquid-phase dearomatics reaction in a second hydrogenation reactor to obtain a liquid-phase dearomatics reaction product; the nitrogen content in the waste tire pyrolysis oil raw material is 3000-10000 μg / g. This method uses waste tire pyrolysis oil from the middle distillate as raw material, achieving deep desulfurization while reducing the removal of nitrogen oxides and monocyclic aromatic hydrocarbon saturation. It also simplifies the overall process flow, reduces the reaction severity, and lowers energy and hydrogen consumption.

The invention belongs to the technical field of plastic pyrolysis, and discloses a plastic pyrolysis oil gas fractionation control method and related equipment, and the method comprises the following steps: obtaining easily measured variable data in a fractionating tower operation process; extracting feature information reflecting the internal state change of the fractionating tower according to the easily measured variable data; according to the feature information, evaluating the actual separation performance of the fractionating tower to the set target fraction; calculating fractionating tower operation parameters according to the set target yield of the target fraction and the actual separation performance evaluation result; applying the calculated fractionating tower operation parameters to fractionating tower control; therefore, the internal state change of the fractionating tower can be sensed more accurately, so that the dynamic operation parameter adjustment based on the actual separation performance is realized, and the control precision of the target fraction yield and the production efficiency are improved.

The invention discloses a method for strengthening a co-pyrolysis synergistic effect based on hydrothermal-forming pretreatment. The method comprises the following steps: 1, grinding and screening raw materials, namely oil-rich coal and lignin, and then drying; 2, uniformly mixing with a CaO catalyst, and carrying out hydrothermal pretreatment to obtain a mixture to be formed; 3, mixing the to-be-formed mixture with deionized water, and carrying out double-roller forming treatment to obtain a formed substance; 4, carrying out a co-pyrolysis reaction on the molded product to generate solid semi-coke and a pyrolysis oil gas product; and 5, condensing and separating the pyrolysis oil-gas product to obtain pyrolysis tar and pyrolysis gas, and collecting solid semi-coke. According to the invention, the CaO catalyst, the hydrothermal pretreatment and the double-roller forming are utilized to synergistically improve the yield and the quality of the co-pyrolysis product of the oil-rich coal and the lignin, so that the co-pyrolysis synergistic effect of the oil-rich coal and the lignin can be enhanced to improve the yield of high-value components, and the emission of greenhouse gases and pollutants in the pyrolysis process can be reduced; and high-value utilization of oil-rich coal and waste lignin resources is realized.

A method for treating mixed plastic waste, the method comprising: (I) pyrolyzing the mixed plastic waste in a pyrolysis reactor at a temperature of 250 DEG C to 700 DEG C and a pressure of 1.0 bar to 100 bar to form a pyrolysis oil; (II) optionally transferring the pyrolysis oil directly to a hydrotreating unit via a filter, and subjecting the pyrolysis oil to hydrotreating with a catalyst in the presence of hydrogen at a temperature of 250 DEG C to 700 DEG C and a pressure of 1.0 bar to 100 bar to form a hydrotreated pyrolysis oil; (III) regenerating a portion of the hydrotreated pyrolysis oil directly from the hydrotreating unit to the pyrolysis reactor.

The invention discloses an oil-containing solid waste and plastic co-pyrolysis method based on carbon residue in-situ catalysis, and belongs to the technical field of solid waste resource utilization. The method comprises the following steps: pre-treating and mixing oil-containing solid waste and waste plastic, and co-pyrolyzing to prepare primary carbon residue and pyrolysis steam; performing acid dipping or oxidation modification on the primary carbon residue to obtain modified carbon residue, performing in-situ catalytic reforming on the pyrolysis steam and the modified carbon residue under the condition that the temperature is not lower than the final pyrolysis temperature, performing fractional condensation separation on a product to obtain pyrolytic oil and hydrogen-rich gas, and performing high-valued preparation on a functional material from the secondary residue. According to the method, the problems that a catalyst needs to be additionally added and the product quality is low in the existing co-pyrolysis technology are solved. No additional catalyst is needed in the whole process, the process cost is reduced, and related secondary pollution of the catalyst is avoided; product quality improvement is effectively achieved, two kinds of solid waste are treated synchronously, and remarkable environmental protection and economic and social benefits are achieved.

The utility model discloses a pyrolysis oil heat recovery device which comprises a fixed bin and a partition plate, and aims to solve the problems that in the prior art, when ordinary heat exchange equipment is used for recovering heat, a single cavity is adopted for heat exchange, on one hand, the heat recovery is not thorough enough, and the heat exchange efficiency is low. In order to solve the problems that in the prior art, a fixed bin is designed, a plurality of partition plates are arranged in the fixed bin, so that the interior of the fixed bin is divided into a plurality of cavities, during heat exchange, heat in the cavities close to the input end part can be concentrated, concentrated recovery is facilitated, and the heat exchange efficiency is improved. The heat exchange liquid is heated to a high temperature, the graded heat exchange function is achieved, further, an automatic conduction assembly is designed, the liquid in the cavity on the rear side can be automatically conveyed into the cavity on the front side through the automatic conduction assembly when the liquid level in the cavity drops, and the automatic supplementing effect is achieved.

The present invention relates to a process for treating a feedstock comprising plastics and / or tyres and / or solid recycled fuel pyrolysis oils containing halogenated compounds, said process comprising: a) a hydrotreating step to obtain a partially hydrotreated effluent having a reduced halogenated compound content, b) a separation step to obtain a partially hydrotreated effluent having a reduced halogenated compound content, and c) a separation step to obtain a partially hydrotreated effluent having a reduced halogenated compound content. The present invention relates to a process for the steam cracking of a petroleum feedstock fed with a partially hydrotreated effluent from step a) and an aqueous solution to obtain a gaseous effluent, an aqueous effluent and a partially hydrotreated hydrocarbon effluent, c) a steam cracking step of a petroleum feedstock wherein at least a portion of the partially hydrotreated hydrocarbon effluent is introduced as a common feedstock, the mixture of the petroleum feedstock and the partially hydrotreated hydrocarbon effluent from step b) has a halogenated compound content of less than or equal to 3 ppm by weight without first undergoing a further hydrotreating step carried out at a higher temperature and / or pressure.

The application discloses a catalytic combustion heater principle prototype, which comprises an air tank, a methane tank, a mixed gas tank and a combustion chamber, the air tank is connected with the mixed gas tank through a connecting pipeline, the gas outlet of the mixed gas tank is connected with the methane tank and the combustion chamber through two connecting pipelines respectively, the top of the combustion chamber is provided with a mixed gas inlet, and a blower is arranged outside the combustion chamber, the application simulates the operation state of the underground catalytic combustion heater, high-temperature tail gas released by catalytic combustion mixed gas is used for heating oil shale layers, so that the oil shale is pyrolyzed to obtain the purpose of exploiting oil and gas, the simulation reference result of the experimental prototype can be understood as the actual operation result, the application not only reduces the exploitation cost of the oil shale in-situ conversion exploitation, but also improves the oil and gas exploitation efficiency, reduces the exploitation cost and reduces the harm of the toxic tail gas generated by incomplete combustion to animals, plants and the environment caused by direct release of the toxic tail gas into the atmosphere.

The present invention belongs to the technical field of resource recovery and utilization, and discloses a method for selectively preparing monocyclic aromatic hydrocarbons by catalytic pyrolysis of waste tires. The steps are as follows: First, the USY molecular sieve is mixed with a Cu(NO3)2·3H2O solution by an impregnation method to prepare a Cu-USY molecular sieve; then the waste tires and the Cu-USY molecular sieve catalyst are loaded into a quartz tube reactor in layers for rapid catalytic pyrolysis to prepare waste tire pyrolysis oil. The present invention solves the problem that the selectivity of the USY catalyst for monocyclic aromatic hydrocarbons is not high during the pyrolysis of waste tires, resulting in a low yield of monocyclic aromatic hydrocarbons, especially the yield of p-cymene. At the same time, the USY molecular sieve is loaded with a cheap transition metal Cu, which saves costs and has high economic value. The pyrolysis oil rich in aromatic hydrocarbons prepared by this method has broad application prospects for the preparation of fuels or deep processing of chemicals.

A recycle content oxo glycol and method of making a recycle content oxo glycol wherein the recycle content is derived directly or indirectly from the cracking of recycle content pyrolysis oil and / or gas. The cracking of the pyrolysis oil can be conducted in a gas furnace or a split furnace.

This invention belongs to the field of ramjet technology and provides a wide-speed range ramjet fuel supply system and method driven by a pyrolysis oil-gas turbine. The system comprises a fuel tank, a centrifugal pump, a motor, an oil-gas turbine, a battery, an electromagnetic control module, fuel lines, a pyrolysis fuel vapor line, a combustion chamber, and a regenerative cooling channel on the outer wall of the combustion chamber. Through the connection between the centrifugal pump, the regenerative cooling channel, and the oil-gas turbine, the system utilizes the cracking of hydrocarbon fuel into small-molecule pyrolysis kerosene vapor to drive the turbine rotor to produce work. The motor then assists in starting the ramjet, thereby resolving the power generation challenges of the ramjet mode and alleviating thermal protection issues.

The present invention provides a system and method for catalytically pyrolyzing waste plastics to produce multiple products. This system belongs to the field of waste plastic pyrolysis and includes a plastic-based carbon source coupled air distribution unit, a catalyst circulation deposition unit, a pyrolysis oil condensation unit, and a hydrogen circulation enrichment unit. The system comprises: the plastic-based carbon source coupled air distribution unit for pyrolyzing the waste plastics and collecting pyrolysis gas and hydrogen-rich circulating gas to obtain a mixed gas, which is then fed into the catalyst circulation deposition unit; the catalyst circulation deposition unit for depositing the mixed gas to obtain carbon nanotubes, hydrogen-rich gas, and condensable gas, which is then fed into the pyrolysis oil condensation unit; the pyrolysis oil condensation unit for condensing the condensable gas to obtain pyrolysis oil, which is then fed into the hydrogen circulation enrichment unit; and the hydrogen circulation enrichment unit for collecting hydrogen-rich gas and providing hydrogen-rich circulating gas and hydrogen-rich gas. This system can effectively solve the problem of a single product in the catalytic pyrolysis of waste plastics, achieve high-value utilization of waste plastics, and realize continuous, industrialized production.