514 results about "Light hydrocarbons" patented technology

The invention discloses a production method and a production device of an energy-saving sustainable aviation fuel, and the production method comprises the following steps: S1, adsorbing carbon dioxide in air by using an adsorbent, desorbing through high-temperature carrier gas, and cooling and compressing the desorbed carbon dioxide; s2, carbon dioxide and deionized water are preheated and then electrolyzed, and synthesis gas and oxygen are generated; s3, after the synthesis gas is compressed, performing Fischer-Tropsch reaction to generate a mixture of Fischer-Tropsch oil wax, light hydrocarbon and water, cooling and separating, and returning the Fischer-Tropsch reaction heat to preheat the synthesis gas; s4, pressurizing the Fischer-Tropsch oil wax, mixing the Fischer-Tropsch oil wax with hydrogen, carrying out hydrofining reaction to generate a gas-liquid isomerous oil-gas mixture, cooling and separating, and recycling heat energy of a product to And S5, after gas-liquid separation, preheating a liquid phase, carrying out rectification operation, separating and cooling to obtain a sustainable aviation fuel product. By recovering the heat in each link, the heat is efficiently utilized, and the energy-saving performance of production is improved.

The invention belongs to the technical field of shale oil development and research, and discloses a shale oil mobility evaluation method based on a two-dimensional nuclear magnetic resonance experiment, which comprises the following steps: dividing an oil-containing shale sample harvested by a closed coring well into three parts which are respectively marked as a sample 1, a sample 2 and a sample 3; carrying out a TOC determination experiment on the sample 1 to obtain the TOC content of the sample; carrying out a step-by-step pyrolysis experiment on the sample 2 to obtain the contents of the sample S1-1 and the sample S2-2; calculating to obtain a shale oil mobility evaluation factor which is marked as FMO; carrying out a two-dimensional nuclear magnetic resonance experiment on the sample 3 before and after centrifugation to obtain the movable oil content of the sample before and after centrifugation, calculating to obtain the percentage of two-nuclear magnetic resonance movable oil, and recording the percentage as MO2D-NMR; and shale oil mobility evaluation is realized through analysis of the relationship between MO2D-NMR and FMO. According to the method provided by the invention, nondestructive testing of the sample can be realized in the two-dimensional nuclear magnetic resonance experiment process, the loss of light hydrocarbon can be reduced to the greatest extent, and the mobility evaluation precision of shale oil is effectively improved.

The invention provides a method for recovering free hydrocarbon contents of different lithologic shale. The method comprises the following steps: carrying out closed freezing heat release, freezing pyrolysis and freezing multi-temperature-order pyrolysis experiment test analysis on a closed coring well core; performing freezing pyrolysis experiment test analysis on the core of the non-closed coring well; carrying out pyrolysis experiment test analysis on the multi-courtyard core; determining the lithology type of the shale; and recovering the free hydrocarbon content of the shale according to an experimental test analysis result and the lithology type. According to the method, light hydrocarbon loss can be reduced to the greatest extent, the content of free hydrocarbons in different lithology non-closed coring well samples and placed samples is recovered, and the accuracy of shale oiliness evaluation is improved.

The invention discloses an alkynyl functionalized hydrogen bond organic framework (HOF) material for efficient reverse separation of propylene / propane as well as a preparation method and application of the alkynyl functionalized hydrogen bond organic framework (HOF) material. The preparation method comprises the following steps: dissolving a tetracarboxylic acid type organic ligand H4L in a benign organic solvent to obtain an H4L solution, then placing the H4L solution in a poor solvent steam atmosphere, and obtaining an HOF material through a gas phase diffusion method; after a low-boiling-point reagent is adopted to carry out solvent exchange on the HOF material, solvent molecules in pore channels of the HOF material are removed through an activation method, and then the alkynyl functionalized HOF material for propylene / propane efficient reverse separation is obtained. The material shows the characteristics of high propane adsorption capacity, excellent propylene / propane reverse separation performance, good cycle performance, easy repair and reproducibility, fills the technical blank of the HOF material in the field of efficient reverse separation of propylene / propane mixed gas, and provides a brand new thought and technical support for research and development in the field of light hydrocarbon separation.

The invention provides a method for preparing alkane olefin by catalyzing microalgae pyrolysis through an alkali modified molecular sieve, and belongs to the field of biomass energy utilization. According to the method, the ZSM-5 molecular sieve raw powder is modified by adopting the alkaline solution, so that the pore structure of the ZSM-5 molecular sieve can be improved, the distribution of acidic sites can be optimized, the regulation and control of a microalgae pyrolytic reaction path can be realized under relatively mild conditions, the deoxidation reaction can be promoted, the content of oxygen-containing products can be reduced, and the generation of alkane olefin substances can be promoted; the aromatization reaction strength is reduced, and the selectivity of light hydrocarbons is improved, so that the content of alkanes and olefins in the pyrolysis bio-oil reaches 70% or above, and the quality of the pyrolysis bio-oil is remarkably improved. Results of the embodiment show that the pyrolysis bio-oil provided by the invention is subjected to gas chromatography-mass spectrometry detection, and the alkane-olefin peak area content is greater than 70%.

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 provides an efficient technological method and system for preparing aromatic hydrocarbon through CO2 hydrogenation. The process method comprises the following steps: 1) mixing feed gas containing CO2 and H2 with recycle gas to obtain a mixture flow, and carrying out first-stage reaction on the mixture flow after heat exchange heating to obtain a first-stage reaction product; 2) performing heat exchange and separation on the primary reaction product to obtain a water phase, a gas phase and an oil phase, discharging the water phase out of the system, compressing most of the gas phase to obtain continuous circulating gas, and circulating the circulating gas back to the step 1) to continue the reaction; a small part of gas phase is discharged as purge gas; 3) distilling out light hydrocarbon from the top of the tower by rectifying the oil phase to obtain aromatic hydrocarbon-rich oil from a tower kettle; 4) heating the light hydrocarbon and then carrying out secondary reaction to obtain a secondary reaction product; and 5) carrying out heat exchange and separation on the secondary reaction product to obtain a gas-phase product and a liquid-phase product, discharging the gas-phase product as purge gas, and circulating the liquid-phase product back to the light component removal tower for rectification and separation to obtain aromatic hydrocarbon-rich oil. The first-stage reaction realizes high per-pass conversion of CO2, and the two-stage reaction is coupled to realize high selectivity of aromatic hydrocarbon.

A testing device for measuring oil, gas and water contents in rock has a heating desorption unit that has a sample chamber for placing a rock sample to be detected, a crushing mechanism arranged within the sample chamber, and a heating mechanism. The heating desorption unit crushes and heats the rock sample in a sealed manner to achieve gas analysis and desorption analysis of oil and water contained therein, thus obtaining components to be detected. The device further has a cold trap collection unit in communication with the sample chamber, a light hydrocarbon capture unit in communication with the cold trap collection unit, a gas measuring unit in communication with the light hydrocarbon capture unit for measuring and calculating a gas volume; and a central control unit for controlling the testing device.

The invention relates to an oil-containing rock sample batch freezing device, an analysis system and an analysis method, and relates to the technical field of oil exploration. A plurality of samples can be placed on the sample plate provided with the plurality of sample cavities at a time, and the sample plate can be quickly frozen by introducing the refrigerating fluid into the first flow channel in the sample plate, so that low-temperature storage of all the samples is realized. The heat preservation box is of a split structure, the heat preservation box is kept in a closed state when the samples do not need to be taken, and the heat preservation box is temporarily opened under the action of the driving mechanism when the samples need to be taken, so that the samples are always in a low-temperature state, and the analysis result is prevented from being influenced by loss of light hydrocarbon components. The oil-containing rock sample batch freezing device is arranged on the pyrolysis instrument, the manipulator of the pyrolysis instrument can grab samples in the sample cavity nearby and send the samples to the detection mechanism for analysis, the time for exposing the samples in the air is short, the analysis efficiency is high, and the result is accurate.

A continuous process includes supplying, to a hydrogen production unit, an energy source in the form of mechanical energy or electrical energy produced from thermal energy generated in a hydrogenation process in a hydrogenation reactor unit, and flowing a light hydrocarbon feed stream into the hydrogen production unit in the presence of a catalyst to produce a hydrogen gas enriched stream using the energy source.

The invention relates to the technical field of continuous light dydrocarbon, in particular to a dynamic configuration device and method for a continuous light dydrocarbon standard sample. Comprising a device main body, a driving unit, a sample feeding assembly and a sample discharging assembly, the device main body comprises a constant temperature layer and a sample preparation bin which are arranged from outside to inside, the sample preparation bin comprises a first bin body and a second bin body, and the opposite ends of the first bin body and the second bin body are respectively connected with a driving unit; according to the device, automatic operation of the whole process can be achieved, and manual intervention intensity and operation errors are greatly reduced; the standard sample concentration output by the device is accurate, stable and good in repeatability, system errors caused by standard sample concentration deviation of the light hydrocarbon instrument can be effectively inhibited, errors of hydrocarbon component content detection are controlled within a low range, the reliability of oil-gas-water layer recognition and evaluation results is remarkably improved, solid data support is provided for oil exploration and development, and the method is suitable for popularization and application. And the exploration decision risk is reduced.

The present invention relates to a process for purifying a plastic feedstock comprising polypropylene, involving:a) dissolving the plastic feedstock in a dissolution solvent comprising a hydrocarbon-based compound having a boiling point of between −15° C. and 100° C., at a dissolution temperature of between 150° C. and 250° C., a dissolution pressure of between 1.0 and 18.0 MPa absolute, to obtain a crude polymer solution;b) purifying the crude polymer solution, comprising:b1) separation of the insoluble matter;b2) washing, with a dense solution;b3) extraction, with an extraction solvent; and / orb4) adsorption of the impurities; and thenc) solvent-polymer separation, using a supercritical separation section, at a temperature of between 160 and 300° C. and a pressure of between 2.7 and 10.0 MPa absolute, followed by at least one solvent recovery section, to obtain purified polypropylene.

The invention provides a structure and thermodynamic parameter coupled natural gas turbine expander outlet state prediction method, and belongs to the technical field of modeling calculation of a thermal process of a non-variable-capacity expansion device. According to the method, structural parameters and working conditions of an expansion machine and thermophysical property data of a natural gas multi-component mixture are obtained, the theoretical outlet state in the ideal isentropic expansion process is calculated, and the total enthalpy loss in the expansion process is estimated. And correcting the outlet enthalpy value based on an energy conservation principle to obtain an actual outlet thermal state. And further performing constant-pressure constant-enthalpy multi-component flash evaporation calculation on the basis of the actual enthalpy value to obtain outlet temperature, gas phase rate, liquid phase rate and gas-liquid two-phase molar component distribution. According to the method, the outlet state parameters of the non-variable-capacity natural gas expansion device under the typical working condition can be accurately predicted, theoretical support is provided for design optimization of processes such as liquefied natural gas production, pressure energy recovery power generation and cryogenic separation of light hydrocarbon, and the system efficiency and the energy recovery level are improved.

The present invention relates to a cold-electricity integrated utilization system based on energy coupling, comprising: an LNG receiving station, wherein LNG is gasified into natural gas after being utilized for cold energy by a cold energy power generation and refrigeration system, a liquid air energy storage system, a cold energy air separation system, and a light hydrocarbon separation system. The natural gas then enters the natural gas pipeline network, the gas-fired power generation system, and the natural gas hydrogen production system; the cold energy power generation and refrigeration system utilizes cold energy to generate electricity for self-use within the plant area, with excess electricity transmitted to the power grid, while also producing refrigerated products; the liquid air energy storage system utilizes cold energy to generate electricity for self-use within the plant area, with excess electricity transmitted to the power grid; the cold energy air separation system utilizes cold energy to produce liquid oxygen, liquid nitrogen, and liquid helium; the light hydrocarbon separation system utilizes cold energy to produce ethane and LPG products; the gas-fired power generation system utilizes natural gas to generate electricity and transmits it directly to the power grid; and the natural gas hydrogen production system utilizes natural gas to produce hydrogen. The present invention can be widely applied to the field of LNG cold energy utilization technology.

A liquefied natural gas (LNG) production complex includes a gravity-based structure (GBS), with liquid storage tanks inside and topside modules on the GBS top slab including interconnecting modules along the GBS top slab centerline, and equipment modules at least some of which are on each side. Equipment modules include: first row on one side: at least one module of reception installations, a condensate stabilization installation, and an acid gas removal installation, and at least one module of mixed refrigerant compressors, second row on the other side: modules of gas dehydration, mercury removal, wide fraction of light hydrocarbons extraction, fractionation and liquefaction installations, and at least one module of boil-off gas, fuel gas system and heating medium compressors; the equipment modules along the GBS short end include: one or more power plant modules, modules with the main technical room and emergency diesel generators, and auxiliary systems modules.

The invention relates to the technical field of civil fuels, in particular to a civil ether-based fuel which is formed by mixing C5 and dimethyl ether. The content of the C5 is 10-30% by weight, the content of the dimethyl ether is 70-90% by weight, the C5 adopted by the civil ether-based fuel is a low-pressure flammable liquid and can still be stored in a common low-pressure steel drum after being mixed with the dimethyl ether, a high-pressure container is not needed, and the leakage and explosion risks are reduced; and during combustion, 'air-light hydrocarbon mixed gas' generated by a special gas generator is saturated gas, is easy to mix with air and is not easy to gather together, so that the occurrence of emergency accidents such as explosion or poisoning and the like is reduced.

A process for producing a sustainable aviation fuel component is described, wherein the process comprises two integrated sub-processes A and B. The sub-processes A comprises providing a renewable feedstock comprising triglycerides, hydrolyzing the triglycerides into free fatty acids which are subjected to a hydrocracking to produce a first hydrocarbon intermediate A. In the sub-processes B of the integrated process, any light hydrocarbons, oxygenates and glycerol released in the sub-processes A are refined into further hydrocarbons, hydrocarbon intermediate B, which together with hydrocarbon intermediate A are isomerized and a sustainable aviation fuel or sustainable aviation fuel component is provided.

The invention discloses a light hydrocarbon catalytic cracking catalyst for high-yield diene as well as a preparation method and application of the light hydrocarbon catalytic cracking catalyst, and belongs to the technical field of catalyst materials. The light hydrocarbon catalytic cracking catalyst for high-yield diene comprises a ZSM-5 molecular sieve with a regular structure, other molecular sieves, an RE-P-Al composite binder, a metal compound and the balance of natural clay, the specific surface area of the ZSM-5 molecular sieve with the regular structure is 320-500 m < 2 > / g, the micropore volume is 0.25-0.40 mL / g, the mesopore volume is 0.12-0.25 mL / g, the grain size is 50-250 nm, and the silica-alumina ratio is 18-150. And the RE-P-Al composite binder is prepared from RE2O3, P2O5 and Al2O3 (aluminum oxide). The light alkane cracking activity and wear resistance of the catalyst are improved, the diene yield is obviously increased, the cost of the catalyst is effectively reduced, and the competitive advantages of a light hydrocarbon catalytic cracking process are improved.

The invention relates to the technical field of environmental protection, and discloses a sewage treatment method and device and application. The method comprises the following steps: S1, spraying absorbent fog drops to the liquid level of the sewage to obtain a rich-liquid oil phase and a water phase; s2, the rich liquid oil phase is subjected to desorption treatment, and rich gas and a circulating absorbent are obtained; s3, condensing the rich gas to obtain gaseous light hydrocarbon and liquid light hydrocarbon; the sewage contains greasy dirt, and the greasy dirt contains at least one of VOCs with the carbon atom number not larger than 12. According to the method provided by the invention, VOCs volatilized from the sewage can be absorbed, volatilization of the VOCs in the sewage can be inhibited, and the liquid light hydrocarbon and the gaseous light hydrocarbon are prepared.

The utility model discloses a safe pressurization system for air-light hydrocarbon mixed fuel gas. The device at least comprises a fuel gas buffer tank and a gas storage tank, the buffer tank is used for buffering the air-light hydrocarbon mixed gas; a primary compressor; the pressurizing device is used for pressurizing the fuel gas output by the fuel gas buffer tank to 0.15 MPa; the first-stage cooler is used for cooling the fuel gas output by the first-stage compressor for the first time; the secondary cooler is used for cooling the fuel gas again; and the second-stage compressor is used for pressurizing the fuel gas cooled by the first-stage cooler to 0.3 MPa. By means of two-stage pressurization and two-stage cooling, pressurization safety control of large-flow 6000 Nm < 3 > / h pentane air-mixed fuel gas is well achieved.

The present application relates to the technical fields of chemical synthesis, and discloses a kind of aviation kerosene production process and equipment, production process includes: carbon source gas, hydrogen, circulating gas is sent into main reactor reaction and obtains including hydrocarbon, methanol, CO, water and unreacted gas mixed component a;Mixed component a is sent into cascade reactor and is prepared to obtain including aviation kerosene component, light hydrocarbon component and water mixed component b, wherein light hydrocarbon component includes one or more of C2-C7 light hydrocarbon;Mixed component b is fractionally condensed to collect liquid phase and gas phase, and liquid phase is carried out three-phase separation to obtain aviation kerosene component, light hydrocarbon component and water respectively, aviation kerosene component is hydrotreated, fractionation to obtain aviation kerosene.The present application realizes the step-by-step control of reaction path in carbon source hydrogenation process through the synergistic effect of main reactor and cascade reactor, improves the selectivity of aviation kerosene target product, so that the obtained product meets the 3# aviation kerosene standard requirements in key indicators such as distillation range distribution, aromatic content and low temperature performance.

The application discloses a method for judging the extension of the oil reservoir swept range of a microbial polymer system, and the steps are as follows: (1) taking the oil well samples in the oil reservoir before and after the microbial polymer flooding to perform the whole hydrocarbon gas chromatographic analysis of crude oil, and determining the small molecular weight light hydrocarbon marker component reflecting the change rule of the crude oil composition; (2) comparing the chromatographic peak area of the small molecular weight light hydrocarbon marker component with the chromatographic peak area of the high molecular weight carbon number, and obtaining the parameter for characterizing the effective action of the microbial polymer; (3) comparing and analyzing the crude oil samples in the oil well before and after the parameter for characterizing the effective action of the microbial polymer, and determining the swept degree of the oil reservoir by the microbial polymer. The application discloses the application of the above method in the microbial oil production for judging the swept volume of the microbial polymer in the oil reservoir.

The application discloses a hydroprocessing method and a hydroprocessing system. The hydroprocessing method comprises a first-stage hydroprocessing step, a middle-stage separation step and a second-stage hydroprocessing step under the condition of 4-15 MPa. The middle-stage separation step separates the effluent obtained in the first-stage hydroprocessing step into heavy components and light components. The second-stage hydroprocessing step processes the heavy components. The reaction raw material of the hydroprocessing method of the application comprises any one, two, three or four of crude benzene full fraction, heavy benzene, coal-based light hydrocarbon and coal tar. The hydroprocessing system is used for implementing the hydroprocessing method of the application. The application realizes two-stage hydroprocessing through the middle-stage separation processing, and effectively separates the heavy components and the light components, so that each reaction stage processes the corresponding best adaptation effect according to the different properties of the raw materials, and the best selection of each component in the raw material into the target product is ensured.

The present invention relates to field of separation processes, particularly to processes for separation of light hydrocarbons utilizing microporous molecular sieving membranes. The inventive process relies on a membrane system comprising at least two membrane units in sequential order, each membrane unit comprising a membrane where molecular sieves are tightly embedded in channels perpendicular to the membrane surface and the membrane comprises a polymer matrix and allows separating a target compound from a mixture of at least 3 compounds. The invention further provides for new membrane systems.

The utility model relates to the technical field of oil and gas field development engineering, in particular to a research experiment device for dissolved CO2 interphase mass transfer in a crude oil system. The experimental device comprises four high-pressure displacement pumps, three intermediate containers, a high-pressure five-way valve, a high-pressure four-way valve, a high-pressure energy accumulator, a high-pressure constant-volume sampling ring, a high-pressure buffer, a high-pressure sampler, a chromatographic analyzer, a programmable constant-temperature box, a high-temperature and high-pressure phase state instrument, a polarization camera and the like. Rapid energy compensation of a two-component fluid can be realized, pressure change disturbance caused by sampling is inhibited, and the interphase mass transfer process and degree of crude oil in which CO2 is dissolved when the crude oil is in contact with light hydrocarbon gas are intuitively tested.

A method for producing hydrogen from inferior heavy oil, comprising: contacting the inferior heavy oil with a catalyst containing large-pore zeolite and a metal oxide and undergoing a pre-decomposition reaction to obtain a reaction stream and a deactivated catalyst with carbon; the reaction stream is separated into reaction gas, light oil, and heavy oil; the light oil is sent to a hydrogen production reactor to obtain reaction gas and a deactivated catalyst with carbon; the reaction gas separated from the pre-decomposition reactor and the hydrogen production reactor is sent to a separation unit for further separation into hydrogen, CO, CO2, and light hydrocarbons; the deactivated catalyst with carbon is sent to a regenerator for regeneration; after the deactivated catalyst is regenerated by burning, a portion of the regenerated catalyst is returned to the pre-decomposition reactor for recycling, and the other portion of the regenerated catalyst is returned to the hydrogen production reactor for reduction and recycling, and the regenerated flue gas is separated to obtain CO and CO2. The present invention pre-decomposes the inferior heavy oil, not only improving the quality of the catalytic cracking feedstock, but also producing hydrogen, thereby achieving efficient utilization of inferior heavy oil resources.

The present disclosure provides methods and systems for producing a C4+ compound, including the steps of: (i) reacting a feed stream comprising C1+O1-3 hydrocarbons in the presence of an acid condensation (AC) catalyst at a condensation temperature and condensation pressure to produce an AC product stream including the C4+ compound; (ii) fractionating AC product stream into an AC liquid product stream including organic products and a vapor stream; (iii) fractionating the AC liquid product stream by a fractionation column into a liquid C4+ compound product stream and a gaseous overhead stream; (iv) cooling the gaseous overhead stream to produce a liquid reflux stream and a gaseous vent stream; (v) recycling a first portion of the liquid reflux stream to the fractionation column for the fractionation in step (iii); and (vi) recycling a second portion of the liquid reflux stream to the feed stream for the reaction in step (i).

The invention belongs to the technical field of natural gas treatment, and discloses a process and a system for recovering ethane and other light hydrocarbon components from oilfield associated gas. A washing tower is arranged before dehydration, heavy hydrocarbon components in the oilfield associated gas are removed, the influence of the heavy hydrocarbon components on a molecular sieve dehydration device is reduced, the service life of a molecular sieve is prolonged, and a liquid phase separated by a low-temperature separator is cooled by a cold box to be cooled and throttled to enter the top of a demethanizing tower; and the low-temperature freezing blockage influence of the carbon dioxide component on the demethanizer can be well reduced.

The invention relates to a generation method, device, equipment and medium of a natural gas cause identification chart, in particular to the technical field of natural gas exploration, and the generation method comprises the following steps: performing a hydrocarbon generation simulation test on a hydrocarbon source rock sample to obtain gaseous analysis gas; performing natural gas composition analysis, natural gas C6-C8 light hydrocarbon composition analysis and natural gas C1-C5 carbon isotope and hydrogen isotope analysis on gaseous analysis gas, and drawing a gas component-gas component relational graph, a light hydrocarbon component-light hydrocarbon component relational graph and a hydrocarbon gas carbon isotope-carbon isotope relational graph of different closed systems; and screening parameters with differences to establish a natural gas cause identification chart of the high-over mature multi-closed system. According to the generation method provided by the invention, a hydrocarbon generation simulation experiment and oil-gas product chemical analysis are carried out, a multi-closed system natural gas cause identification chart is established, and theoretical support is provided for cover layer closure evaluation in regional oil-gas exploration, regional oil-gas resource evaluation and oil-gas-containing distant view and exploration field evaluation.

The application relates to the adsorption and desorption technical field and discloses an adsorption and desorption device and a treatment method for treating light hydrocarbon VOCs waste gas, which comprises an inlet flame arrester, one end of the inlet flame arrester is fixed with a light hydrocarbon VOCs waste gas inlet, the other end of the inlet flame arrester is fixed with a plurality of air draft fans through Y-shaped pipelines, the air draft fans are fixed with adsorption and desorption devices through pipelines, a plurality of functional layers are arranged in the adsorption and desorption devices, the functional layers comprise adsorption and desorption layers, heat preservation and cold preservation layers and condensation and heat exchange layers, oil-water separators are fixed in the condensation and heat exchange layers of the adsorption and desorption devices through pipelines. Through the unique adsorption and desorption device structure design, the pipeline arrangement is greatly simplified, the device land occupation area is effectively reduced, the investment cost is reduced, the temperature control is guaranteed, the safety hidden danger caused by high temperature is avoided, and the problems of space and high investment cost are solved.