922 results about "Cracking reaction" patented technology

The invention belongs to the technical field of petrochemical process simulation and intelligent optimization control, and particularly relates to a method for constructing and optimizing a full-fraction oil catalytic cracking reaction kinetic model. The construction method comprises the steps of raw material matrix construction, reaction network construction, product property calculation, model parameter optimization and process prediction calculation. The optimization method comprises the following steps: constructing a process optimization index system comprehensively reflecting environmental and economic targets; systematic optimization of reaction conditions and product distribution is realized; intelligent regulation and efficient prediction of the catalytic cracking process are realized; and optimal reaction operation conditions meeting multiple requirements are obtained. The method is high in adaptability, process parameters can be adjusted according to the properties of the raw materials, and efficient conversion is achieved. By optimizing the catalytic cracking process, the yield of aromatic hydrocarbon can be remarkably improved. By predicting and optimizing reaction conditions through the kinetic model, the energy consumption is reduced, the reaction efficiency is improved, meanwhile, the equipment investment and operation cost can be reduced, and the production efficiency and economic benefits are improved.

The invention relates to the technical field of intelligent control of chemical reactors, and discloses an intelligent temperature control system for a step-by-step catalytic cracking reactor, which comprises a temperature field modeling module, a sensor configuration module, an index definition module, a control execution module, an analysis and diagnosis module and the like. The temperature field modeling module constructs a standard temperature field distribution model through infrared thermal imaging and generates virtual temperature points; the sensor configuration module is used for arranging a real temperature point and acquiring a temperature gradient and a temperature point missing rate; the index definition module sets a preset temperature index based on the thermodynamic parameters; the control execution module realizes steady state, dynamic response, heat balance and composite regulation and control; and the analysis and diagnosis module carries out fault tracing on the target which does not pass regulation and control and adjusts a strategy. The system further comprises a data acquisition module and a communication interface module, so that data storage and external communication are realized. The method improves the temperature control precision and the system self-adaption capability, and is suitable for the complex temperature control scene of the catalytic cracking reaction.

The invention discloses a photovoltaic-driven IDC electric-cooling linkage method and device, and belongs to the technical field of IDC electric-cooling linkage, and the method comprises the following steps: S1, constructing a gravity energy storage structure; s2, the gravity object is lifted to the highest point of the gravity object channel through the gravity energy storage structure; s3, air at the bottom of the gravity object channel is compressed for the second time, and a thermal cracking reaction is carried out; s4, thermal cracking gas generated by the thermal cracking reaction is drained, and combustion products are discharged into a gas storage chamber; s5, the generated steam waste heat pushes a turbine in a turbine chamber to do work for power generation; and S6, domestic hot water and night heating hot water are prepared, convective heat exchange is conducted, the low-temperature reclaimed water obtained after heat exchange is heated into high-temperature steam in a cooler, the high-temperature steam enters a turbine to become high-temperature reclaimed water, and the high-temperature reclaimed water flows into a control center or a water storage pool. The organic matter compressed garbage is used as a gravity object for gravity energy storage, and heavy oil, solid fuel, adsorbents and other high-value products are produced in the gravity energy storage process.

The invention discloses an alkaline earth metal modified aluminum oxide loaded nickel-based catalyst as well as preparation and application thereof. The alkaline earth metal modified aluminum oxide loaded nickel-based catalyst comprises a nanofiber-shaped gamma-Al2O3 carrier, Ni and alkaline earth metal oxide, wherein the Ni and the alkaline earth metal oxide are loaded on the carrier; the alkaline earth metal is at least one of Mg and Ca. The invention provides application of the alkaline earth metal modified aluminum oxide loaded nickel-based catalyst in a methane dry reforming reaction or a methane cracking reaction. The thermal stability and the carbon deposition resistance of the catalyst can be effectively improved, and the catalyst has good catalytic performance in a methane dry reforming reaction and a methane cracking reaction.

The present invention uses viscose-based carbon fiber as raw material, chops it and mixes it with auxiliary material A solution, then puts the mixed chopped fibers into a vacuum tube furnace for heating to obtain pretreated carbon fiber, then mixes auxiliary material B solution with the pretreated carbon fiber to obtain mixed carbon fiber, and puts the mixed carbon fiber into an oven for cross-linking and curing to obtain a mixed gel, and finally performs a high-temperature cracking reaction on the mixed gel to finally obtain a short-fiber hard thermal insulation composite material. The viscose-based short-fiber thermal insulation composite material of the present invention has low thermal conductivity, good mechanical properties, and excellent density and high-temperature resistance.

The invention provides an efficient environment-friendly petroleum passivator as well as a preparation method and application thereof, and belongs to the technical field of passivators. The preparation method comprises the following steps: reacting bismuth nitrate with tetra (4-carboxyl phenyl) porphyrin and benzoic acid to prepare a carboxyl phenyl porphyrin bismuth-MOF material, reacting antimony nitrate with tetra (4-pyridyl) porphyrin and benzoic acid to prepare a pyridyl porphyrin antimony-MOF material, and performing sol-gel reaction on lanthanum isopropoxide and cerium isopropoxide to prepare lanthanum-cerium sol; the preparation method comprises the following steps: mixing calcium nitrate, magnesium chloride, organic acid, organic amine and hydrogen peroxide for reaction to prepare a calcium / magnesium organic matter, mixing the calcium / magnesium organic matter with other substances, adding the mixture into an acetonitrile / ethanol mixed solvent, and uniformly stirring and mixing to prepare the efficient environment-friendly petroleum passivator. The high-efficiency environment-friendly petroleum passivator prepared by the invention is green, safe, non-toxic and efficient, has better capturing and passivating effects on metal ions such as nickel and vanadium in the catalytic cracking reaction process of heavy oil, improves the activity of a catalyst, prolongs the service life of the catalyst, and thus, has a wide application prospect.

The invention relates to the technical field of catalysis, and discloses a catalytic cracking device and method. The device comprises a multi-stage reaction unit and a cracking reaction unit, the multi-stage reaction unit comprises a variable-diameter riser and a multi-stage reaction settler, and the cracking reaction unit comprises a cracking riser and a cracking settler; the variable-diameter lifting pipe comprises a first reaction zone, a second reaction zone and a third reaction zone which are sequentially connected in series in the length direction, the inner diameter of the second reaction zone is larger than that of the first reaction zone and that of the third reaction zone, and an inner conveying pipe extending into the second reaction zone is arranged at the joint of the third reaction zone and the second reaction zone; the cracking settler comprises a cracking steam stripping section, a turbulence reaction section and a cracking settling section which are sequentially arranged along the length direction of the cracking settler, an outlet of the cracking riser is positioned in the turbulence reaction section, and the cracking steam stripping section is provided with a cracking catalyst outlet communicated with the second reaction area. The device can improve the reaction efficiency of catalytic cracking of heavy oil and light hydrocarbon, and realizes tight coupling of heavy oil and light hydrocarbon.

The invention discloses a shale oil in-situ thermal cracking reaction experimental device and a use method thereof, the shale oil in-situ thermal cracking reaction experimental device comprises a continuous gas injection pressurization system and a cracking reactor which are connected in sequence, and further comprises a sample collection system; an electric heating rod is arranged in the cracking reactor; the electric heating rod is an annular heating rod, and a reaction bin is arranged in the electric heating rod; a gas measuring assembly and a liquid measuring assembly are arranged in the sample collecting system. According to the invention, by changing the type and flow of injected gas and carrying out experiments at different heating rates, pyrolysis final temperatures and pyrolysis time, samples are collected and analyzed, the relationship between each reaction parameter and the product structure and yield can be determined, and the designed reaction bin can react with shale oil cores at the highest temperature of 800 DEG C and under the pressure of 20 MPa.

The invention provides an oil shale supercritical CO2 fracturing and in-situ conversion integrated device and a working method, belongs to the technical field of oil shale exploitation, and realizes efficient cooperation of supercritical CO2 fracturing and in-situ conversion by integrating a CO2 liquefaction storage system, a fracturing heating system, a stratum simulation system and a data monitoring system. The device comprises a CO2 liquefying and storing system, a CO2 liquefying and storing system, a CO2 liquid storage system, a CO2 liquid storage system and a CO2 liquid storage system, the oil shale fracturing and heating system is used for fracturing the rock core under the simulated formation confining pressure condition and triggering the oil shale in-situ cracking reaction through medium-frequency heating; the oil shale fracturing model is used for simulating an underground fracturing environment and guiding crack propagation; the data monitoring system collects temperature and pressure parameters in real time to optimize process regulation and control. The fracturing process and the conversion process are innovatively coupled, the supercritical CO2 has the characteristics of a fracturing medium, a heat transfer carrier and a reaction medium, the energy utilization rate and the CO2 circulation efficiency are remarkably improved, and the oil shale recovery rate is increased.

The invention relates to the technical field of waste tire recovery, in particular to a method and a system for preparing biological aviation fuel by hydrogenation of waste tire pyrolysis oil, a pretreatment unit is used for performing multi-stage filtration and preheating treatment on the waste tire pyrolysis oil; the hydrogenation reaction unit is used for carrying out hydrogenation reaction and shallow cracking reaction on the pretreated waste tire pyrolysis oil; the separation and purification unit comprises a hot high-pressure separator, a dechlorination reactor, a cold high-pressure separator, a hot low-pressure separator and a cold low-pressure separator, and is used for carrying out dechlorination reaction and gas-oil-water separation treatment on a product of the shallow cracking reaction; the circulating hydrogen unit is used for providing mixed hydrogen for the system; and the fractionation unit is used for fractionating the product separated by the separation and purification unit to obtain the biological aviation fuel. According to the method, the waste tire pyrolysis oil is converted into the biological aviation fuel by adopting a series hydrogenation process, so that the problem of waste tire treatment is solved, and high-value utilization of resources is also realized.

The invention relates to the technical field of methanol cracking hydrogen production, in particular to a process and a system for methanol cracking hydrogen production. Raw material methanol liquid is conveyed to a heat exchanger from a methanol storage tank through a metering pump and is heated and preheated through heat exchange of the heat exchanger, and the preheated raw material methanol liquid is conveyed into a methanol vaporizer to be vaporized into methanol steam; methanol steam enters a reactor and is catalyzed by a catalyst, a cracking reaction is carried out, high-temperature converted gas of hydrogen and carbon monoxide is generated, the high-temperature converted gas is conveyed to a product end after being subjected to heat exchange and cooling by a heat exchanger, the high-temperature converted gas is used as a heat source to exchange heat with fed methanol, and the converted gas is cooled while the methanol is preheated, so that energy complementation is realized; and the process ensures that methanol is fully vaporized, the temperature of the reactor is controlled at the optimal temperature for direct methanol cracking, and the direct methanol cracking reaction is sufficient and less in side reaction under the catalysis of a copper-based catalyst with high activity and good selectivity.

The invention discloses a composite aperture molecular sieve catalytic cracking catalyst and a preparation method thereof, and belongs to the technical field of catalytic cracking, the composite aperture molecular sieve catalytic cracking catalyst comprises 20-30% of a macroporous material, 40-60% of a mesoporous-microporous molecular sieve and 20-30% of a binder; the macroporous material is a macroporous alumina / kaolin compound, and the macroporous alumina / kaolin compound takes macroporous alumina as a core and macroporous kaolin as a shell; the mesoporous-microporous molecular sieve is a ZMQ-1 molecular sieve. According to the mode, the macroporous material is prepared from the macroporous aluminum oxide / kaolin compound, the ZMQ-1 molecular sieve and the binder, and the macroporous material takes macroporous aluminum oxide as a core and macroporous kaolin as a shell in the macroporous aluminum oxide / kaolin compound. The catalyst for catalytic cracking of heavy oil has the advantages of high yields of dry gas, liquefied gas, gasoline and diesel oil, low yields of coke and heavy oil and the like. The secondary cracking reaction of gasoline or diesel oil can be effectively prevented, so that the yield of gasoline and diesel oil is improved.

The invention discloses an intelligent catalytic thermal cracking reaction system and method for complex mixed waste plastics, and belongs to the technical field of waste plastic resourceful treatment. The system comprises a feeding device, a high-pressure multi-section cracking reaction kettle, a spraying type heat exchange temperature control system, a heating system, a sensing and analyzing unit, an intelligent control system and a product condensation separation and utilization unit, the method specifically comprises the following steps: (1) pretreating and feeding raw materials; (2) multi-section temperature control cracking reaction; (3) intelligent feedback control; (4) the catalyst has a synergistic effect; and (5) product separation and recovery. According to the invention, a unique spraying type high-pressure multi-section temperature control system is combined with intelligent control of a rate matching algorithm, so that efficient, directional and stable cracking of complex mixed waste plastics is realized, the yield of high-value products such as light olefins, aromatic hydrocarbons and the like is remarkably improved, byproduct residues and energy consumption are reduced, and long-term continuous operation is realized.

Hybrid catalysts for simultaneous dehalogenation and cracking of plastic derived oil include composite particles, where each of the composite particles includes red mud particles and Mordenite zeolite particles. A process includes contacting a plastic derived oil stream with the hybrid catalyst in an FCC reactor to produce an FCC effluent and a used hybrid catalyst. The plastic derived oil stream comprises halogen-containing compounds, and contacting the plastic derived oil stream with the hybrid catalyst causes halogen-containing compounds to react to form hydrocarbons and hydrogen halides, where the hydrogen halides are adsorbed onto surfaces of the red mud particles. The FCC effluent has a concentration of the halogen-containing compounds less than the plastic derived oil stream. Contacting the plastic derived oil stream with the hybrid catalyst causes hydrocarbons in the plastic derived oil stream to undergo cracking reactions over the Mordenite zeolite particles to produce the FCC effluent.

The present invention discloses a kind of mesoporous ZSM 5 molecular sieve and preparation method thereof, the preparation method comprises the following steps:Silicon source, aluminum source, alkali source, crystallization inducer, auxiliary agent, water are mixed to obtain crystallized gel, the crystallized gel is crystallized under hydrothermal conditions, washed, filtered, dried, roasted, and mesoporous ZSM 5 molecular sieve is obtained;Wherein, the silicon source is magadiite, the crystallization inducer is organic ammonium salt and seed crystal, and the auxiliary agent is selected from at least one of alcohol or amine. The molecular sieve obtained by the method of the present invention has the characteristics of high crystallinity, large specific surface area, and large micro-mesopore volume. The preparation method of the present invention adopts cheap silicon source, and in the case of adding a small amount of mesoporous template agent, mesoporous ZSM 5 molecular sieve can be synthesized, which is applied to light hydrocarbon catalytic cracking reaction with good low-carbon olefin selectivity.

The invention discloses a method for preparing low-grafted glucosyl stevioside at high temperature and high pressure, which comprises the following steps: taking stevioside as a receptor, beta-cyclodextrin as a donor and CGT enzyme as a catalyst for reaction to obtain reaction liquid containing glucosyl stevioside; putting the reaction liquid containing the glucosyl stevioside into a high-pressure reaction kettle, and adding a catalyst to carry out high-temperature and high-pressure cracking reaction; after the high-temperature and high-pressure cracking reaction is finished, cooling a cracking solution to room temperature, filtering, concentrating for multiple times by adopting a polymeric membrane, and collecting a trapped fluid; and carrying out spray drying on the trapped fluid to obtain the low-grafting glucosyl stevioside. According to the method, firstly, glucosyl stevioside is prepared by adopting an enzyme modification method, then splitting decomposition is performed under certain conditions, and then a specific purification process is performed, so that the prepared product is high in stability, the proportion of low-grafted glucosyl stevioside in the product is high, and the product tastes good.

The utility model discloses a methanol hydrogen production device which comprises a steam vaporization tank, a cracking reaction tank and a cooler which are connected in sequence, the steam vaporization tank comprises an outer container and an inner container arranged in the middle of the outer container in a sleeved mode, the inner container is used for containing heating media, and a heating pipe is arranged in the inner container; a methanol containing cavity is defined between the inner container and the outer container; and a steam outlet pipe is arranged at the top of the side wall of the outer container. The steam vaporization tank is of a double-layer structure, heat conduction oil is arranged in an inner container and is half-filled, methanol gas is arranged on the upper portion between the inner container and the outer container, liquid is arranged on the lower portion between the inner container and the outer container and is uniformly vaporized into methanol steam, gas on the upper portion is overheated and enters the cracking reaction tank, the cracking reaction tank is provided with a plurality of steel pipes filled with catalysts, and the methanol steam is long in gas path and is uniformly cracked into mixed hydrogen under the action of the catalysts.

The utility model belongs to the technical field of methane hydrogen production, and particularly relates to a methane cracking hydrogen production system which comprises a molten metal reactor, the bottom of the molten metal reactor is connected with a methane inlet pipe, and the upper portion of the molten metal reactor is connected with a hydrogen discharge pipe and a carbon flow guide pipe. A buffer area, a reaction area and a hydrogen buffer area are sequentially arranged in the shell from bottom to top, the buffer area is used for conducting gas diffusion on methane to enable the methane to enter the reaction area, the methane is subjected to a high-temperature cracking reaction in the reaction area to generate hydrogen and carbon black, and the hydrogen upwards enters the hydrogen buffer area and is discharged through a hydrogen discharging pipe I; carbon black is deposited upwards at the bottom of the hydrogen buffer area, a carbon scraping device is arranged in the methane cracking system and used for pushing and sweeping the carbon black, and the carbon black enters a carbon collecting and cleaning device through a carbon flow guide pipe.

The invention relates to the technical field of high-temperature industrial equipment manufacturing, and discloses a carbon black reaction furnace based on temperature control and an optimized production preparation process, the carbon black reaction furnace comprises the steps of raw material pretreatment, multi-temperature zone cracking reaction, quenching termination reaction, carbon black collection and tail gas cyclic utilization, and by designing a multi-temperature zone cooperative temperature control mechanism and combining a dynamic temperature compensation technology, the carbon black reaction furnace is optimized. The uniformity and the stability of thermal field distribution in the reaction furnace are improved, the problem of non-uniform reaction caused by temperature gradient of a traditional device is solved, the nucleation and growth process of the carbon black is carried out in a highly controllable thermal environment, and a guarantee is provided for obtaining products with highly uniform particle sizes; on-line monitoring and closed-loop feedback control are constructed, real-time sensing and intelligent regulation and control of key process parameters are achieved, fluctuation in the production process is inhibited in time, it is guaranteed that reaction conditions are always in the optimal interval, and therefore the consistency of product quality and the reliability of process operation are improved.

The invention relates to a method and system for producing conductive carbon black from waste tire pyrolysis oil, and the method comprises the following steps: the waste tire pyrolysis oil and carrier gas respectively enter a pyrolysis reactor which is heated to a reaction temperature through an electromagnetic induction coil, and are subjected to a pyrolysis reaction under an anaerobic condition, and the obtained reaction product is quenched by a quenching medium; and carrying out gas-solid separation to obtain a product containing the conductive carbon black. According to the method, efficient utilization of the waste tire pyrolysis oil is facilitated, high-performance carbon black can be prepared, the carbon black prepared through the method has good conductivity, and the value of the waste tire pyrolysis oil is increased.

The invention relates to the technical field of catalytic materials, in particular to a catalyst and a preparation method and application thereof. The invention provides a catalyst. The catalyst comprises organosilane modified mesoporous silica and nickel-molybdenum bimetallic loaded in the organosilane modified mesoporous silica. Nickel in the catalyst can promote hydrogen activation and hydrogenation, and molybdenum plays a role in catalytic cracking reaction. On the catalyst, the synergistic effect generated by combination of bimetal and acidic sites is more beneficial to efficient HDO reaction (catalytic hydrodeoxygenation reaction). The result of the embodiment shows that when the conversion rate of the model compound guaiacol is 100%, the highest selectivity of the obtained product naphthenic alcohol can reach 50.1%; when the catalyst is applied to the hydrodeoxygenation conversion reaction process of biomass alcoholysis derivative oil, the yield of naphthenic alcohol is greatly increased, and the relative content is increased from 3.5% to 49.8%.

To provide a process and an apparatus for the production of hydrogen gas from ammonia, and a use of the apparatus, so that the overall process has improved modularity while the process is made simple and has the optimized cost and conversion rate.SOLUTION: The invention relates to a process for the production of hydrogen gas (4) from ammonia, thereby obtaining an effluent gas (6) including hydrogen gas. The process includes the steps of providing an ammonia feedstock stream (8) and performing at least one electrical heating and conversion step, the step including: heating in at least one electric heater (12) the ammonia feedstock stream so as to produce a heated gas stream (14); and performing in at least one adiabatic reactor (16) an endothermic cracking reaction of the heated gas stream (14). The adiabatic reactor includes at least one catalyst bed (18) performing the endothermic cracking reaction of the ammonia feedstock stream into the effluent gas.SELECTED DRAWING: Figure 1

The invention relates to the technical field of petrochemical cracking furnaces, in particular to a cracking method of an electrified cracking furnace and an electrified cracking device. The raw material flow is heated and then mixed with the diluted steam flow, the mixture is fed into a convection section of a cracking furnace to be overheated and then fed into a radiation section of the cracking furnace to be subjected to a cracking reaction to obtain cracked gas, the cracked gas is cooled by a quench cooler to obtain a product, and a rotating unit in the cracking method is driven by a motor; the steam pocket generates medium-pressure steam flow, and the medium-pressure steam flow is fed into the quench cooler to be subjected to heat exchange with cracking gas and then is fed into a medium-pressure steam pipe network. According to the technical scheme, a rotating unit of the cracking furnace is changed to be driven by the motor to rotate, so that the control is simpler. And the energy utilization efficiency is improved by changing the technological process and the connection mode of the cracking furnace.

A process for upgrading a hydrocarbon feed comprises contacting the hydrocarbon feed with steam in the presence of a cracking catalyst composition at reaction conditions sufficient to cause at least a portion of hydrocarbons in the hydrocarbon feed to undergo one or more cracking reactions to produce a steam catalytic cracking effluent comprising light olefins, light aromatic compounds, or both, where the cracking catalyst composition comprises a cracking additive comprising metal species impregnated on a ZSM-5 zeolite, where the metal species comprises a metal selected from the group consisting of chromium, vanadium, iron, platinum, molybdenum, cerium, and nickel.

The invention discloses a method and device for treating inferior oil and waste plastics through a slurry bed, and the method comprises the following steps: S1, mixing the inferior oil with hydrogen, preheating, conveying to a slurry bed reactor for reaction, enabling a product to enter a thermal high-pressure separator for reaction, carrying out gas-liquid separation to obtain a gas-phase component and a liquid-phase component, washing the gas-phase component with water, and discharging; and S2, mixing the liquid phase component obtained in the step S1 with waste plastic, then carrying out thermal cracking reaction in a waste plastic cracking furnace, fractionating the product to obtain a light fraction and a heavy fraction, separating the heavy fraction into a heavy component and a light component through a centrifugal separation device, circulating the heavy component to the slurry bed reactor for reaction, and treating the light fraction and the light component to obtain the product.

The present invention relates to a method for catalytic cracking production of biomass liquid fuel, and the method is as follows: Take MCM-48 mesoporous molecular sieve and calcine it in a solution impregnated with cobalt salt and metal borate to obtain a molecular sieve catalyst. Take lignin raw material and sugar raw material, dry them, and then carry out temperature-raising microwave cracking in a cracking reaction fluidized bed. The oil and gas are further catalytically cracked by the molecular sieve catalyst, and the oil liquid is recovered by condensation. The oil liquid, hydrogen-supplying mixed solvent and Ru / C catalyst are subjected to hydrodeoxygenation, and centrifuged for supercritical extraction and upgrading. The material at the top of the extraction tower enters a first-stage separation tower and a second-stage separation tower under reduced pressure for continuous reduced-pressure separation to obtain the finished product of biomass liquid fuel. The modified MCM-48 molecular sieve catalyst catalytically cracks biomass lignin raw material and sugar raw material by a two-step method, strengthens the deoxygenation reaction, and then undergoes supercritical extraction and upgrading and reduced-pressure separation, reducing the reaction temperature and acid value of the biomass liquid fuel, and improving the liquid-gas conversion rate, high-carbon-number oil liquid yield and product calorific value.

The invention relates to the technical field of waste tire pyrolysis oil treatment, in particular to a method and system for series hydrotreatment of waste tire pyrolysis oil, and the method comprises the following steps: S1, mixing pretreated waste tire pyrolysis oil with mixed hydrogen, and then carrying out primary preheating and low-temperature hydrotreatment; s2, performing hydrofining reaction and shallow cracking reaction on the low-temperature hydrogenation effluent; s3, performing thermal high-pressure separation treatment on the cracking reaction product to obtain a first gas phase and a first liquid phase; s4, condensing the first gas phase, performing cold high-pressure separation treatment to obtain a second gas phase and a second liquid phase, and performing cold low-pressure separation treatment on the second liquid phase to collect an oil phase; the first liquid phase is subjected to thermal low-pressure separation treatment to obtain a third gas phase and a third liquid phase, and the third gas phase is condensed and then subjected to cold low-pressure separation treatment to collect an oil phase; and S5, mixing the third liquid phase and the oil phase, and carrying out reaction product fractionation treatment. According to the technical scheme, deep processing of the waste tire pyrolysis oil is achieved, energy consumption of the device is reduced, and the continuous operation period of the device is prolonged.

The invention discloses a waste plastic cracking device, and relates to the technical field of plastic cracking devices, the waste plastic cracking device comprises a conveying belt, and the conveying belt is used for feeding waste plastic through a feeding hopper; a cylindrical machine body is erected on the initial-section thermal cracking machine through a frame body, a conveying screw rod is arranged in the machine body, a feeding hopper is arranged on the front section of the machine body, a plurality of heat conduction layers wrap the peripheral wall of the machine body, a heating layer is arranged outside each heat conduction layer, an extrusion die is connected to the tail end of the machine body, and the extrusion die is connected with a discharging pipe; a feeding hole is formed in the thermal cracking main furnace body, so that the molten plastic waste can enter the cracking reaction chamber; a heating device is arranged on the periphery of the cracking reaction chamber; an oiling output pipe is arranged at the upper part of the cracking reaction chamber; a conveying pipe is arranged at the bottom of the cracking reaction chamber, and a slag outlet of the conveying pipe is connected with a slag outlet set. According to the invention, the waste plastics are cracked in a batch heating manner, so that the reaction time is shortened, the energy is saved, and the safety is improved.

The invention provides a heavy oil cracking and separating process based on supercritical carbon dioxide cooperation, and relates to the technical field of industrial oil refining. Comprising the following steps: fully mixing heavy material oil with supercritical carbon dioxide, adding the mixture into a microwave reactor, and carrying out cracking reaction under the action of a microwave field to obtain a cracking mixture; placing the cracking mixture in a supercritical separator, enriching light cracking products in a supercritical carbon dioxide phase and precipitating heavy components and impurities in a heavy phase by controlling the temperature and pressure in the supercritical separator, and separating the supercritical carbon dioxide phase from the heavy phase; performing vacuum flash evaporation or low-temperature separation on the supercritical carbon dioxide phase to obtain a gasoline fraction, a diesel fraction and C1-C4 cracked gas; through a triple core mechanism, the yield and quality of light oil which are far higher than those of a coking technology are obtained at the cost far lower than that of a hydrogenation technology.

A Silicalite-1 (at) ZSM-5 core-shell molecular sieve takes a Silicalite-1 molecular sieve as a core layer and a ZSM-5 molecular sieve as a shell layer, the particle size is 90-140nm, and a preparation method of the Silicalite-1 (at) ZSM-5 core-shell molecular sieve comprises the following steps: (1) mixing a template agent, a first silicon source and water to obtain a core-layer molecular sieve synthesis system, and performing aging I and crystallization I to obtain an intermediate product; and (2) mixing the intermediate product obtained in the step (1), an aluminum source, a second silicon source, an alkali source, a zwitterion balancing agent and water to obtain a shell molecular sieve synthesis system, carrying out aging II and crystallization II, washing and drying the obtained solid, and roasting to obtain the Sillicalite-1-coated ZSM-5 core-shell molecular sieve. The molecular sieve is high in carbon capacity, simple in preparation method and low in cost, and can be used for a low-carbon alkane catalytic cracking reaction, a heavy aromatic hydrocarbon lightening reaction and a light hydrocarbon aromatization reaction.