730 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 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 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 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 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 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.

The invention discloses a waste sulfuric acid treatment method, and relates to the technical field of environmental engineering, the waste sulfuric acid treatment method comprises: a pretreatment module configured with a multi-stage filtering device and a pH adjusting tank and used for removing suspended solids in waste acid and adjusting the acid concentration; a vanadium-titanium-cerium composite catalyst is arranged in the catalytic cracking reactor, sulfuric acid is decomposed at a set temperature under microwave-assisted heating to generate SO2 gas, and meanwhile heat energy is supplied to the pretreatment unit through a waste heat recovery device; the electrochemical separation module comprises a bipolar membrane electrodialyzer and a pulse electrode array and is used for separating and recovering metal ions Fe < 3 + > and Cu < 2 + > from the cracking raffinate and regenerating sulfuric acid with a set concentration; and the intelligent control center integrates an AI algorithm and an Internet of Things sensor, and dynamically optimizes the cracking temperature, the membrane voltage and the material flow. According to the invention, intelligent sorting, directional conversion and closed-loop recovery are taken as the core, and the problems of high energy consumption, difficulty in differential treatment and heavy pollution in waste sulfuric acid treatment are solved.

A hybrid catalyst for simultaneous dehalogenation and cracking of plastic derived oil includes a plurality of composite particles, where each of the composite particles includes red mud particles and USY zeolite particles. A process for upgrading plastic derived oil includes contacting the plastic derived oil with the hybrid catalyst in an FCC reactor to produce an FCC effluent and a used hybrid catalyst. The plastic derived oil comprises halogen-containing compounds, and the contacting at reaction conditions causes halogen-containing compounds to react to form hydrocarbons and hydrogen halides, which are adsorbed onto surfaces of the red mud particles. The contacting at reaction conditions also causes hydrocarbons in the plastic derived oil to undergo cracking reactions to produce the FCC effluent. The FCC effluent may have a reduced concentration of the halogen-containing compounds. A system that includes the hybrid catalyst is also disclosed.

The invention provides a method and a system for recycling polycrystalline silicon slag slurry. The recycling method of the polycrystalline silicon slag slurry comprises the following steps: carrying out aluminum removal treatment and titanium removal treatment on a high-boiling-point substance generated by slag slurry treatment to obtain an intermediate high-boiling-point substance; carrying out cracking reaction on the intermediate high-boiling residue and hydrogen chloride to obtain a cracking product and residual liquid; carrying out rectification treatment on the cracking product to obtain gas-phase chlorosilane and a low-boiling-point substance; carrying out concentration treatment on the residual liquid to obtain gas-phase chlorosilane and a concentrated product; and carrying out first hydrolysis treatment on the concentrated product to obtain hydrogen and waste liquid. According to the method for recovering the polycrystalline silicon slag slurry, the high-boiling residues in the polycrystalline silicon slag slurry can be efficiently recovered, and the resource utilization rate is increased.

The application discloses a method and device for preparing propylene by catalytic cracking of olefins. The method comprises the following steps: (1) feeding the raw material rich in olefins into a reactor from the bottom, and then into a catalyst bed layer through a gas distributor, and then flowing upwards into a separator at the upper part of the reactor after a catalytic cracking reaction occurs in the catalyst bed layer; (2) separating the product into a C3 and below fraction, a C4 fraction and a C5 and above fraction in the separator; and the ratio of the diameter to the height of the catalyst bed layer is 2:1-10:1, preferably 3:1-6:1. The application combines the thin-layer catalyst bed layer with the gas distributor and the design of directly connecting the separator to the upper part of the reactor, so that the reaction product is rapidly taken away from the olefin cracking reactor for separation, the reaction depth can be effectively controlled, the occurrence of a side reaction is avoided, the reaction efficiency is improved, and the load of a subsequent separation process is reduced.

The application discloses a modified ZSM-5 molecular sieve catalyst and a preparation method and application thereof. The preparation method of the modified ZSM-5 molecular sieve catalyst comprises the following steps: mixing ZSM-5 molecular sieve with a solvent to obtain a liquid-solid mixture; adding a modification precursor solution into the obtained liquid-solid mixture to perform a modification reaction, so as to obtain a modified liquid-solid mixture; performing drying and calcination on the modified liquid-solid mixture to obtain a catalyst precursor; and repeating the modification process for 2 to 10 times to obtain the modified ZSM-5 molecular sieve catalyst. According to the application, the surface diffusion performance of the molecular sieve is improved by regulating the properties of the surface hydroxyl and defects of the ZSM-5 molecular sieve, and the application of the molecular sieve in an olefin catalytic cracking reaction for preparing ethylene and propylene can improve the catalytic efficiency, the reaction life and the selectivity of the target product.

The present invention discloses an ammonia cracker with dynamically adjustable thermal field coupling and a control method, which includes an ammonia preheating device and an ammonia cracking reaction device. The ammonia preheating device includes a combustion preheating chamber and a controllable pure ammonia burner. The combustion preheating chamber includes a combustion chamber and an ammonia preheating chamber. The ammonia preheating chamber surrounds the outer periphery of the combustion chamber. The controllable pure ammonia burner includes an ammonia fuel nozzle and an air swirl assembly. The air swirl assembly includes a plurality of swirl fan blades, and the circumferential spacing between the plurality of swirl fan blades is adjustable. The ammonia cracking reaction device includes a tail gas inlet pipe, a mixed gas heat exchange chamber, and an ammonia cracking reaction tube. The ammonia cracking reaction tube is arranged in the mixed gas heat exchange chamber. The inlet of the mixed gas heat exchange chamber is simultaneously connected to the tail gas inlet pipe and the combustion chamber. The ammonia cracking reaction tube is connected to the ammonia preheating chamber, and an ammonia cracking catalyst is arranged inside the ammonia cracking reaction tube. The present invention realizes the requirements of high ammonia cracking rate and high energy utilization efficiency, and at the same time, the hydrogen production amount can be dynamically adjusted according to the hydrogen demand of the ammonia internal combustion engine.

The present application belongs to the technical field of acetylene preparation, and discloses a method and system for efficiently preparing acetylene and hydrogen from natural gas based on turbine cracking. The method comprises the following steps: obtaining 95%-100% purified methane gas through raw material pretreatment, preheating to 523-823 K, and then feeding into a turbine cracking reaction unit to be heated to 1800-2200 K within 1-10 ms and cracked for 1-10 ms; the cracked gas is quenched to below 800 K within 0.5-3 ms and the waste heat is recovered; finally, carbon black, high-purity acetylene and hydrogen are obtained through gas-solid and gas separation. The system comprises raw material pretreatment, preheating, turbine cracking reaction, quenching and waste heat recovery, gas-solid separation, gas separation units, and a matching monitoring and collaborative control module, and realizes multi-parameter collaborative control and online carbon cleaning. The present application does not introduce oxygen, the conversion rate of natural gas is 92%-95%, the acetylene yield is 83%-87.5%, the energy consumption is low, the products are easy to separate, it is green and environmentally friendly, and it is suitable for industrial continuous production.

A method for producing low-aromatic white oil involves the mercapto-olefin addition reaction of a nickel mercaptonicate complex with methylallyltri-n-butyltin and vinyl ferrocene, respectively, using a carbon molecular sieve as a support to prepare a hydrogenation catalyst. This catalyst exhibits good mass transfer performance, inhibiting cracking reactions and pore blockage. The porous structure of the carbon molecular sieve provides effective channels for hydrogen atoms to diffuse on and within the catalyst surface, thereby improving hydrogen utilization. Dispersing nickel metal ions on the support surface to form a monolayer or multilayer structure enhances catalyst activity. It also resists the influence of some harmful substances on catalyst activity. The hydrogenation catalyst prepared by this invention enhances catalyst stability, reduces sintering and deactivation rates, thereby extending catalyst life. Furthermore, it contributes to improving the efficiency and selectivity of the hydrocracking process.

This invention relates to the field of catalytic cracking catalyst preparation, and discloses a catalytic cracking catalyst, its preparation method, and its application. The catalytic cracking catalyst comprises a molecular sieve, a binder, and clay; based on the total mass of the catalyst, the mass content of the molecular sieve is 60-85%, the mass content of the clay is 5-20%, and the mass content of the binder is 10-35%; the mesopore size of the catalyst is 3-50 nm; in the catalyst, the volume of mesopores with a pore size of 6-10 nm accounts for 8-30% of the total mesopore volume; in the catalyst, the volume of mesopores with a pore size of 30-35 nm accounts for 10-30% of the total mesopore volume. This catalyst exhibits excellent catalytic performance and, when applied to catalytic cracking reactions, especially naphtha catalytic cracking reactions, demonstrates high conversion rates and low-carbon olefin yields.

The present invention provides a method for producing light olefins by catalytic cracking of light oil. The method comprises preparing light olefins using light oil as a raw material and a heat storage catalyst as a catalyst; based on 100% dry basis of the heat storage catalyst, the catalyst contains at least the following components in weight percentage: 10%-50% molecular sieve, 10%-40% heat storage material, and 40%-80% carrier; the heat storage material has a thermal conductivity of 20-500 W / m·K and a specific heat capacity of 600-1200 J / kg·K. The present invention electrically heats the heat storage catalyst to supplement heat for the regenerator and provide energy for the cracking reaction, replacing the existing method of adding fuel oil or pulverized coal for supplementary heat. This avoids local overheating that causes structural deactivation of the catalyst, helps slow the rate of catalyst activity reduction, reduces catalyst consumption, and eliminates additional carbon emissions.

The invention relates to the technical field of molecular sieve synthesis, in particular to a sheet ZSM-5 molecular sieve as well as a preparation method and application thereof. The preparation method of the sheet ZSM-5 molecular sieve comprises the following steps: S1) uniformly mixing an aqueous solution of a silicon source, a mineralizer, an aluminum source and a seed crystal to obtain gel; and S2) mixing the gel with a growth inhibitor, crystallizing, and calcining to obtain the sheet ZSM-5 molecular sieve. A mineralizer and a growth inhibitor are introduced in a molecular sieve crystallization process, and the sheet ZSM-5 molecular sieve is directly prepared by a one-pot method. The method is simple and convenient to operate and simple in step, and the prepared sheet molecular sieve has the characteristics of high specific surface area and short b axis, and is beneficial to reducing the diffusion resistance of macromolecular substrates and products. The molecular sieve is used as an active component in a naphtha cracking catalyst, and shows excellent conversion rate and diene selectivity in a naphtha cracking reaction.

This invention discloses a method and system for the comprehensive utilization of catalytic oil slurry. The method first involves hydrogenating the catalytic oil slurry. The separated hydrogenated tail oil then undergoes a cracking reaction. The cracking products are treated with an extractant. After separation, the extract phase is processed by recovering the extractant to obtain aromatic oil. The heavy fraction obtained from the separation of the aromatic oil enters a coking reaction zone, where it reacts to yield oil gas and needle coke products. A comprehensive utilization system for catalytic oil slurry using the above method is also provided. The method and system of this invention can improve the mechanical strength of the obtained needle coke, effectively improve the microstructure of the needle coke, and obtain high-quality needle coke.

The invention provides a combined process method for improving the yield of vacuum residue catalytic cracking products, which comprises the following steps: determining the asphaltene dispersion coefficient d of vacuum residue according to a formula (1), where w asphaltene, w colloid and w aromatics respectively represent the mass fractions of asphaltene, colloid and aromatics in vacuum residue; and carrying out modification and catalytic cracking reaction on the vacuum residue. According to the combined process method, the asphaltene dispersion coefficient d is ingeniously designed, and d is smaller than or equal to 0.5 and dgt; the vacuum residue of which the content is 0.5 is modified by adopting different modification methods, and then catalytic cracking reaction is performed under different conditions, so that the density of a catalyst in a reactor is improved, oil-agent contact in the reactor is improved, the contact instantaneous effective agent-oil ratio can be improved, the catalytic cracking reaction ratio can be remarkably improved, thermal cracking and condensation coke generation reactions are reduced, and the catalytic cracking efficiency is improved. Conversion of inferior heavy oil is promoted, meanwhile, the coke yield is remarkably reduced, and the yield of high-value products is increased.

The utility model discloses polycrystalline silicon and organic silicon high boiling pyrolysis reactor system of promoting gas solid liquid three -phase mass transfer relates to chemical industry technical field. The polycrystalline silicon and organic silicon high boiling pyrolysis reactor system of promoting gas solid liquid three -phase mass transfer, including reactor main part, catalyst stacking unit, liquid distributor main part and gas distribution unit. The polycrystalline silicon and organic silicon high boiling pyrolysis reactor system of promoting gas solid liquid three -phase mass transfer, gas catalyst passes into the exhaust pipe through the communication groove, and then gas catalyst is evenly sprayed into the catalytic filler of loading net cylinder through the spray head, and the liquid raw material is evenly flowed through the catalytic filler of loading net cylinder through the liquid distribution port, so that the gas and solid catalyst are mixed in the loading net cylinder, the reaction rate is improved, and the uniformity of mixing is ensured, the mixing effect of liquid raw material and gas is improved, and the reaction and product generation are accelerated.

The invention provides an energy-saving rotary continuous discharging cracking furnace. The energy-saving rotary continuous discharging cracking furnace comprises a rotary furnace and a combustion furnace used for providing a heat source for the rotary furnace; the rotary furnace at least comprises a furnace body and a heating tube nest arranged in the furnace body, an outlet of the heating tube nest penetrates through the furnace wall of the furnace body and leads to the outside of the furnace body, the outer wall of the heating tube nest and the furnace wall of the furnace body are sealed, a heat collecting cover is arranged at the position, located at the outlet of the heating tube nest, outside the furnace body, and the heat collecting cover is communicated to a waste heat utilization unit. The combustion furnace is used for combusting combustible gas, generating heating gas and leading the heating gas to the heating tube nest; and the combustion furnace is connected with the heating tube nest through a heat supply main pipe penetrating through the furnace body. The heat waste in the cracking reaction process of the cracking furnace can be reduced.