45 results about "Hydrogen+Methane" patented technology

The invention provides a multi-target collaborative optimization scheduling method for a hydrogen-containing comprehensive energy system, and the method comprises the steps: building a hydrogen energy diversified utilization model containing electrolytic hydrogen production, hydrogen-to-methane production, hydrogen-to-electricity conversion, carbon capture, hydrogen storage and thermoelectric hydrogen doping, and fully absorbing surplus wind power new energy; on the basis, economy and low-carbon property are taken into consideration, a hydrogen-containing comprehensive energy system multi-target optimization scheduling model with minimum total operation cost and minimum carbon emission as targets is established, the model is solved in combination with an epsilon-constraint method and a TOPSIS decision-making method, and quantity-quality cooperative operation of the comprehensive energy system is promoted. Under the condition that the hydrogen doping ratio of fuel gas is fixed, the total cost and the carbon emission amount are reduced along with the increase of the hydrogen doping ratio of the CHP unit, and when the hydrogen doping ratio reaches up to 20%, the economic benefit and the environmental benefit of the IES are the best. Compared with a traditional IES optimization scheduling problem, multi-objective optimization can better promote quantity-quality cooperative operation of the IES, the overall performance of the comprehensive energy system is improved, and the method can be widely applied and popularized.

The invention discloses a preparation method of a large-thickness (111) crystal orientation monocrystal diamond for a semiconductor, and aims to solve the problems of low growth rate and poor growth quality of the (111) crystal orientation diamond. The preparation method of the monocrystal diamond comprises the following steps: S1, heating and soaking a seed wafer in mixed acid; s2, performing etching treatment on the seed wafer by using hydrogen plasma; s3, oxygen is introduced into the vacuum cavity; s4, methane continues to be introduced into the vacuum cavity, the volume concentration of methane, hydrogen and oxygen is controlled, and microwave plasma chemical vapor deposition growth is carried out; s5, controlling the growth time; and S6, polycrystals on the surface of the blank are cut off. According to the method, the MPCVD process is adopted, and parameters such as gas concentration, temperature, pressure intensity and microwave energy in the growth process are controlled, so that homoepitaxial growth of the high-quality single crystal (111) crystal orientation diamond is realized, the production cost of the (111) crystal orientation diamond is reduced, and the realization of mass production of the (111) crystal orientation single crystal diamond is facilitated.

This invention discloses a thin-film composite membrane and process for the separation of carbon dioxide from non-hydrophilic gases such as methane, hydrogen, and nitrogen. The thin-film composite membrane has a gas-separation layer and a nonporous high-diffusion-rate layer, and has carbon dioxide to non-hydrophilic gas selectivity that is greater than the intrinsic selectivity of the gas-separation layer alone.

This utility model discloses a safety performance testing chamber for mining electromechanical equipment, including a chamber body, an explosion-proof door, an observation window, a top sealing mechanism, an intermediate sealing partition, a foundation, and pipeline interfaces. The chamber body is a rectangular steel structure, using a composite design of steel plates and grid-shaped reinforcing ribs, and is made of carbon steel and stainless steel composite materials, making it vibration-resistant and explosion-proof. The intermediate sealing partition is removable, dividing the chamber body into two small compartments or forming a complete large chamber, flexibly adapting to the testing of small or large diesel engines. The top sealing mechanism uses a U-shaped groove and a venting membrane seal, allowing for rapid pressure relief in the event of an explosion. The side walls are equipped with a rotating explosion-proof door and a high-temperature tempered glass observation window for easy entry, exit, and observation. The foundation is fixed with anchor bolts, and the interior and exterior of the chamber are coated with antistatic, flame-retardant, and rust-proof paint. This utility model can withstand the impact of a methane-air or methane-hydrogen-air mixture explosion, ensuring safety; it is suitable for verifying the safety performance of diesel engines in underground coal mines, and has the advantages of high efficiency, safety, and economy.

The present application belongs to the field of powder metallurgy technology, specifically discloses a kind of powder metallurgy composite material and preparation method thereof, including copper powder and aluminum powder are respectively subjected to low-energy ball milling, after obtaining smaller powder, cold-pressed into copper thin sheet blank and aluminum thin sheet blank respectively;In an oxygen-free box, thin sheet blank is sequentially placed in acetone, ethanol, water, dilute hydrochloric acid to ultrasonically remove surface oxide film, then sequentially cleaned with water, ethanol and acetone, dried;Copper thin sheet blank is transferred in a tube furnace, methane, hydrogen and argon are passed through to carry out the in-situ vapor deposition of graphene, the graphene-copper thin sheet blank after deposition is transferred in an oxygen-free box and stacked with aluminum thin sheet blank at intervals, then sealed and coated out of the box;After hot pressing and sintering in a sintering machine, it is put into a vacuum furnace and densified and sintered under an argon atmosphere. This method can effectively reduce the material cost of copper materials.

The invention relates to a methane, hydrogen and hydrogen-doped methane under-expansion jet fire flame evaluation processing method and application. The method comprises the following steps: acquiring the proportion of each gas component in a mixed gas, the absolute pressure of the mixed gas and the temperature of the mixed gas; determining the molar mass, the gas adiabatic index and the air-fuel ratio of the mixed gas according to the proportion of each gas component; the constant-pressure adiabatic combustion temperature of the mixed gas is determined according to the proportion of all the gas components and the first law of thermodynamics; the gas speed at the leakage opening is determined; determining the gas density at the leakage port; the flame Froude number of the under-expansion jet flame is determined according to the air-fuel ratio of the mixed gas, the constant-pressure adiabatic combustion temperature, the gas density at the leakage opening and the gas speed at the leakage opening; and determining the flame length of the under-expansion jet flame according to the flame Froude number of the under-expansion jet flame and the proportion of each gas component in the mixed gas. In this way, the flame length of the under-expansion jet flow flame can be accurately and consistently determined.

This invention relates to the field of metallurgical technology, and more particularly to a method for preparing vanadium nitride using a mixed reducing gas. The method includes: grinding vanadium trioxide uniformly and pressing it into vanadium pentoxide tablets; placing the tablets in an electric furnace; first heating to 500-700°C under a nitrogen atmosphere; then introducing a mixed gas of methane, hydrogen, and nitrogen and holding for 20 minutes; then further heating to 800-850°C and holding for 20 minutes to obtain high-purity vanadium trioxide; subsequently heating to 1050-1150°C and holding for 1-5 hours to obtain crude vanadium nitride; stopping the introduction of the reducing gas and holding at 1050-1150°C for 0-4 hours under a nitrogen atmosphere; and then cooling to room temperature to obtain high-quality vanadium nitride. The technical solution mentioned in this invention features a low-temperature, short-time, and simple-to-operate vanadium nitride preparation process, enabling its large-scale application. Simultaneously, the resulting products are carbon monoxide and hydrogen, both of which can be recycled, thus helping to reduce carbon emissions.

The utility model relates to the technical field of chemical production, and discloses a methane hydrogen recovery device which comprises a regeneration gas unit, a regeneration gas separation tank, a methane hydrogen compressor, a first overline pipeline and a second overline pipeline, the regeneration gas separation tank is connected with the regeneration gas unit through a second main pipeline, the methane hydrogen compressor is connected with the regeneration gas separation tank through a third main pipeline, and the methane hydrogen compressor is connected with the hydrogen production device through a fourth main pipeline; the first overline pipeline is connected with the first main pipeline and the second main pipeline, the second overline pipeline is connected with the first main pipeline and the third main pipeline, and each overline pipeline is provided with a regulating valve. Compared with the prior art, the methane hydrogen recovery device fully recovers the surplus methane hydrogen of the ethylene device and uses the surplus methane hydrogen as a raw material of the hydrogen production device, so that the problem that the surplus methane hydrogen of the ethylene device in the prior art can only release a torch is solved.

A methane and hydrogen mixer with a bionic DNA (deoxyribonucleic acid) double-helix structure relates to the technical field of hydrogen energy utilization, and through the DNA double-helix structure formed by two spiral columns and a guide plate, methane and hydrogen can be more fully contacted and mixed in the mixer, so that the mixing uniformity is improved. Meanwhile, the bionic DNA double-helix structure can optimize a fluid channel and flow velocity distribution in the mixing element, so that the fluid resistance is reduced, the energy loss in the mixing process is reduced, and the energy efficiency of the whole system is improved.

The invention discloses a comprehensive energy system optimized operation method considering stepped carbon transaction and hydrogen energy diversified utilization. The method comprises the steps that a hydrogen energy diversified utilization model including electrolytic hydrogen production, hydrogen-to-methane production, hydrogen-to-electricity conversion, carbon capture, hydrogen storage and fuel gas hydrogen doping is established; based on a hydrogen energy diversified utilization model, a stepped carbon transaction mechanism is introduced, the carbon emission of the system is converted into carbon transaction cost, and a stepped carbon transaction cost model is established; on the basis of the stepped carbon transaction cost model, the lowest total operation cost of the system is used as an optimization target, and a hydrogen-containing comprehensive energy system low-carbon economic dispatching model is constructed; and under the condition that the constraint of the integrated energy system is met, solving the low-carbon economic dispatching model of the hydrogen-containing integrated energy system to obtain the total operation cost, the carbon emission and the optimal output of each device in each time period of the integrated energy system. Therefore, consumption of new energy can be effectively promoted, carbon and emission are reduced, and low-carbon economic dispatching of the comprehensive energy system is achieved.

The invention provides a methane / hydrogen quality separation method and system.The method comprises the following specific steps that methane / hydrogen mixed raw material gas is pressurized, cooled and desulfurized and then mixed with a hydrate accelerant solution to react, and methane hydrate and a gas-phase product are obtained through separation; decomposing the methane hydrate, and separating to obtain methane; and after a gas-phase product is dried, a solid hydrogen storage alloy is utilized for adsorption, and separation of hydrogen and residual methane is achieved. Compared with hydrogen, methane is easier for water molecules to form hydrates, and hydrogen can be selectively combined with the hydrogen storage alloy to generate hydrides, so that efficient separation of methane and hydrogen can be realized through a multi-step process flow and equipment configuration based on selective host-guest interaction.

The embodiment of the invention provides a light hydrocarbon separation system and method and a light hydrocarbon preparation system. The system comprises a demethanation unit, a decarburized light hydrocarbon unit, a low-temperature heat exchange unit, a first expansion unit and a second expansion unit, the decarburized light hydrocarbon unit is used for receiving the residual material conveyed by the demethanation unit and separating out the decarburized light hydrocarbon; the first expansion unit is used for receiving the methane hydrogen, performing expansion treatment on the methane hydrogen, and conveying the expanded methane hydrogen to the low-temperature heat exchange unit to serve as a refrigerant of the low-temperature heat exchange unit to provide cooling capacity; and the second expansion unit is used for receiving the gas-phase carbon disulfide hydrocarbon, carrying out expansion treatment on the gas-phase carbon disulfide hydrocarbon and conveying the expanded carbon disulfide hydrocarbon to the low-temperature heat exchange unit so as to serve as a refrigerant of the low-temperature heat exchange unit to provide cooling capacity. According to the system, the carbon disulfide light hydrocarbon in the separation process is conveyed to the low-temperature heat exchange unit to serve as a refrigerant to provide cooling capacity, and energy consumption of light hydrocarbon separation is remarkably reduced.

The system is characterized in that the input end of a methane hydrogen heater is communicated with a demethanizer, and the output end of the methane hydrogen heater is communicated with the input end of a liquid phase dryer; the output end of the mixed C4 heater is communicated between the output end of the methane hydrogen heater and the input end of the liquid phase dryer; the output end of the gas-liquid separation tank is communicated with the input end of the regenerated methane hydrogen coalescer; and the output end of the regenerated methane hydrogen coalescer is communicated with the input end of an external fuel pipe network. According to the utility model, a mixed C4 steam stripping process and a regenerated methane hydrogen secondary dehydration process are added, so that the water content in regenerated methane hydrogen gas is ensured to meet the requirements of receiving conditions of a fuel gas pipe network. According to the system for regenerating and recycling olefin by using methane hydrogen, disclosed by the invention, a mixed C4 and methane hydrogen medium is self-produced, so that the purpose of regenerating and recycling ethylene-propylene olefin substances by using the liquid-phase dryer is achieved, the nitrogen consumption and the torch gas emission are reduced, and the ethylene-propylene yield and the resource utilization rate are improved.

The invention provides a system and a method for reducing ethylene loss of a light cracking raw material, and belongs to the field of petrochemical industry. The system comprises a compression unit, wherein pyrolysis gas is introduced into an inlet of the compression unit; the multi-stage cooling and separating unit comprises at least three stages of coolers and corresponding separating tanks, and an inlet of the multi-stage cooling and separating unit is communicated with an outlet of the compression unit; an inlet of the demethanizer is respectively communicated with liquid phase outlets of all stages in the multi-stage cooling and separating unit; the first expansion compressor unit is communicated with a gas phase outlet of the last stage of the multi-stage cooling separation unit and a tower top gas outlet of the demethanizer; an inlet of the second expansion compressor unit is communicated with a tower top gas outlet of the demethanizing tower, and an outlet of the second expansion compressor unit is communicated with an inlet of the compression unit. The system provided by the invention reduces the loss of ethylene along with hydrogen from two aspects of separation precision and circulation optimization, and finally reduces the loss of ethylene in the methane hydrogen product.

To provide a hydrogen supply device for a methane gas fermentation tank capable of safely and easily eliminating clogging SOLUTION: In a biomethanation reaction for converting carbon dioxide (CO2) contained in a biogas into methane (CH4) by adding hydrogen into a digestive liquid of a methane fermentation tank, a hydrogen gas feeder 11 is inserted and arranged through an insertion part 7 provided in the methane fermentation tank 1. The hydrogen gas supply device includes a first tube part configured such that a distal end region thereof is positioned in the digestive juice W, and a second tube part disposed in the first tube part so as to be capable of being inserted into and pulled out from the first tube part and having a length capable of protruding from a distal end open region of the first tube part, and the second tube part has a hydrogen gas blowing region communicating with the inside of the tube in a protruding region protruding from the distal end open region of the first tube part.SELECTED DRAWING: Figure 2

Apparatus for separation of a gaseous mixture containing CO2, hydrogen and water includes a compressor for compressing the gaseous mixture to a first pressure, a temperature swing adsorption unit for drying the compressed gas mixture comprising at least two adsorbent beds, a separation unit for separation of the dry and compressed gaseous mixture to produce at least two streams, being a liquid enriched in CO2 and depleted in at least one of methane, hydrogen or carbon monoxide as compared with the gaseous mixture and a first residual gas depleted in CO2 and enriched in at least one of methane, hydrogen or carbon monoxide as compared with the gaseous mixture, a pressure swing adsorption unit for separation of the first residual gas depleted in CO2 by adsorption in order to produce at least one gas richer in CO2 than the first residual gas and at least one gas depleted in CO2 and enriched in at least one of methane, hydrogen or carbon monoxide as compared to the first residual gas, a conduit for sending to one of said adsorbent beds a regeneration gas which is at least a part of at least one gas depleted in CO2.

The invention discloses a quantitative traceability measuring method for a mixed gas source of a working face, and belongs to the technical field of underground gas disaster prevention and control. At least two drill holes are drilled in each drill site upwards adjacent to the coal seam, at least two drill holes are drilled in the coal seam, at least two drill holes are drilled in the drill site downwards adjacent to the coal seam, and at least one coal sample is taken from each drill hole; s2, measuring a methane carbon isotope value (13C), an ethane carbon isotope value (13C), a carbon dioxide carbon isotope value (13C), a methane hydrogen isotope value (2H) and an ethane hydrogen isotope value (2H) of each coal sample; s3, measuring the isotope value of the gas sample of the mixed source gas; and s4, performing quantitative traceability analysis. According to the method, the hydrocarbon same-digit measuring technology is adopted, the symbolic hydrocarbon isotope value of each coal seam is effectively utilized, the proportion of the mixed source gas sample from each coal seam is calculated by establishing a mathematical model, the source of the mixed source gas sample is quantitatively traced, the distinction degree is high, and the accuracy is high.

The invention provides a light hydrocarbon separation system and a method thereof. The system comprises a demethanation unit, a decarburized light hydrocarbon unit and an expansion unit, wherein the demethanation unit comprises a first condenser; the demethanation unit, the decarburized light hydrocarbon unit and the expansion unit are sequentially connected through pipelines, and the expansion unit is connected with the first condenser through a pipeline; the demethanization unit is used for separating out methane hydrogen in a material, and the first condenser is used for cooling the methane hydrogen; the decarburized light hydrocarbon unit is used for receiving the residual material conveyed by the demethanation unit and separating out the decarburized light hydrocarbon; the expansion unit is used for receiving the gas-phase carbon disulfide hydrocarbon and conducting expansion treatment on the gas-phase carbon disulfide hydrocarbon, and liquid-phase carbon disulfide hydrocarbon obtained after expansion is conveyed to the first condenser to serve as a refrigerant of the first condenser to provide cooling capacity. According to the system, the carbon disulfide light hydrocarbon in the separation process is conveyed to the condenser to serve as a refrigerant to provide cooling capacity, and energy consumption and cost of light hydrocarbon separation are remarkably reduced.

The present invention belongs to the technical field of dry gas concentration and gas separation, and discloses a method and device for separating concentrated gas after concentration based on a change in dry gas raw material. The present invention adds an expander to the top of the absorption tower, and adds an ethylene coarse separation tower after the concentration, and provides the methane hydrogen cooling capacity of the expanded absorption tower top to the coarse separation tower. The crude ethane at the bottom of the coarse separation tower meets the ethane furnace feeding conditions without consuming the cooling capacity of the public works. The crude ethylene at the top of the tower does not contain carbon triple components and does not need to pass through a depropanizer, but only needs to pass through a demethanizer and an ethylene refining tower for separation. The dry gas raw material of the dry gas concentration device is changed from the hydrocarbonized tail gas produced by the gas-phase dry gas to ethylbenzene production device to catalytic dry gas. Compared with the original process, the present invention can reduce the total energy consumption by 21.2%; through the method of separation after concentration, the liquid-phase method is used to produce ethylbenzene instead of the gas-phase method, and 1.2 tons / h of high-grade ethylbenzene can be produced; thus significantly reducing energy consumption and improving product quality.

The invention belongs to the technical field of refinery dry gas treatment, and discloses a method and a system for preparing hydrogen for a fuel cell by refinery dry gas C2 recovery coupling, the method comprises the following steps: 1) deoxidizing; 2) compressing; 3) cooling; 4) absorption: feeding the cooled refinery dry gas into an absorption tower to obtain a tower kettle material flow and tower top tail gas; 5) desorption: the tower kettle material flow of the absorption tower enters a desorption tower, and the recovered C2 concentrated gas is obtained at the top of the tower; 6) reabsorption: enabling the tail gas at the top of the absorption tower to enter a reabsorption tower to obtain tower kettle material flow and methane hydrogen tail gas at the top of the tower; 7) stabilizing; and 8) performing vacuum pressure swing adsorption or membrane separation and pressure swing adsorption to obtain the hydrogen for the fuel cell. According to the method, the absorption temperature is high, ethylene and propylene refrigeration compressors and expansion machines are not needed, the energy consumption is low, the investment is small, and the operation is simple; and C2 and hydrogen resources in the refinery dry gas are effectively recovered.

The invention relates to a method and a system for regenerating a desulfurization adsorption bed of an ethylene unit, the method is characterized in that preheated vaporized ethane preheated by a cold box is divided into two streams, one stream is used as regenerated gas to perform regeneration treatment on the desulfurization adsorption bed and returns to a cracking furnace of the ethylene unit to participate in cracking reaction after being cooled; the other part is used as diluted temperature-adjusted ethane to return to the cracking furnace of the ethylene device to participate in cracking reaction, water is not introduced into the circulating ethane in the whole process, and wet hydrogen sulfide is not formed, so that an alkali washing system additionally arranged for treating the wet hydrogen sulfide can be reduced, the occupied area and equipment investment of the system are reduced, and the competitiveness of the ethylene device is further improved. Moreover, according to the system disclosed by the invention, the methane hydrogen generated by the ethylene device is directly used as a fuel to return to the combustor of the cracking furnace after heat exchange, and sulfides are not introduced, so that the problem that the sulfides in the discharged flue gas after combustion of the methane hydrogen exceed the limit can be avoided, and the environment-friendly up-to-standard emission of the flue gas is realized.

The present disclosure relates to a system and method for producing low-carbon olefins and aromatics from catalytic conversion of light hydrocarbon oil, which independently sets the device for cracking reaction and the device for catalyst regeneration, and can improve the adaptability and safety of the system. A second regeneration catalyst cooler is arranged on the second regeneration inclined pipe to reduce the temperature of a part of the regenerated catalyst, which can flexibly adjust the catalyst activity and concentration in the riser reactor, significantly increase the catalyst / oil ratio, improve the contact area between the raw material and the catalyst, significantly enhance the catalytic reaction, improve the yield of low-carbon olefins and low-carbon aromatics, and reduce the yield of methane hydrogen and coke. In addition, an oil-gas quencher is arranged in the system of the present disclosure to quickly reduce the temperature of the reaction oil-gas at the outlet of the reactor, avoid the safety hazards caused by excessive thermal cracking and condensation coking of the reaction oil-gas in the large oil-gas pipeline at the outlet of the reactor, and effectively utilize the heat in the high-temperature reaction oil-gas.

The application belongs to the technical field of membrane preparation and application, and discloses a modification method for improving the gas separation performance of carbon molecular sieve membranes. The hydrogen / methane, hydrogen / nitrogen and hydrogen / carbon dioxide separation performance of the carbon molecular sieve membrane is improved in the form of impregnating an oxidizing agent. The hydrogen / methane, hydrogen / nitrogen and hydrogen / carbon dioxide selectivity of the carbon molecular sieve membrane is changed by introducing oxygen-containing functional groups into the carbon molecular sieve membrane, and the carbon molecular sieve membrane has a wide application prospect in the field of gas separation membranes.

The present application relates to the technical field of gas permeability test, and more particularly to a device and method for testing the permeability of a mixture of methane and hydrogen in a polymer sample, characterized in that the device comprises a piston, a fixed iron plate, a methane filling chamber, a methane-hydrogen mixing chamber, a permeated gas concentration detection chamber, a pressure gauge, a connecting pipeline, a stop valve, a fixed screw, a fixed nut, a polymer sample, a gas cylinder, and a gas sensor; compared with the closest prior art, the device can adjust the mixing ratio of methane and hydrogen; and can also test the permeability of a mixture of methane and hydrogen with different ratios. The test results obtained by the present application are closer to the actual service conditions of polymer materials and elastomer seals in a mixed gas environment.

The invention belongs to the field of ethylene and related technologies, and discloses a dryer regeneration system and method for gas raw material cracking. The system comprises a gas cracking raw material pipeline, a regeneration gas heat exchange unit, a distribution unit, a dryer user and a regeneration gas treatment unit. Methane / hydrogen tail gas or hydrogen-rich tail gas generated by conventional cracking is not used, circulating ethane generated by a cracking device and raw material ethane gas and raw material propane gas of the device are adopted as regeneration gas, the hydrogen-rich gas can be kept at high pressure and directly used as raw material gas of a PSA hydrogen concentration device, power consumption of a compressor of a PSA unit is reduced, and the energy consumption of the PSA unit is reduced. And the energy consumption of the whole device is reduced while more hydrogen products are produced as byproducts.

The invention relates to the technical field of catalysts, and discloses a catalytic cracking catalyst and a preparation method and application thereof, the catalyst comprises a catalyst matrix and a rare earth metal component loaded on the catalyst matrix; the catalyst matrix comprises a molecular sieve, clay and a binder; wherein the EPMA is used for carrying out line analysis on the section of the catalyst particle, and the average loading depth of the rare earth metal component does not exceed 25% of the radius of the catalyst particle. The catalytic cracking catalyst has excellent metal resistance, has a lower ratio of dry gas to hydrogen to methane under the condition of containing pollution metals such as Ni and V, and is relatively low in hydrogen yield, high in gasoline yield and high in conversion rate.

To provide a marine engine fuel supply device capable of supplying fuel containing methane CH4 and hydrogen H2 to a marine engine without using a hydrogen storage tank.SOLUTION: A marine engine fuel supply device comprises: an LPG reformer 40 (reforming device) that uses LPG (liquefied petroleum gas) as a raw material to produce methane-rich gas containing methane CH4, hydrogen H2, and carbon dioxide CO2; and a CO2 separator 50 (removal device) that removes part of carbon dioxide contained in the methane-rich gas produced by the LPG reformer 40 and supplies the gas to a marine engine. The methane-rich gas produced by the LPG reformer 40 has a carbon dioxide (CO2) concentration of less than 20 vol% and a hydrogen (H2) concentration of 10 vol% or more.SELECTED DRAWING: Figure 1

The present disclosure relates to a down-flow bed reaction system and method for producing low-carbon olefins and aromatics from catalytic conversion of light hydrocarbon oil, which independently sets the device for cracking reaction and the device for catalyst regeneration, and can improve the adaptability and safety of the system. The down-flow bed reactor in the order of gravitational field can reduce the gas-solid axial back mixing, and thus can improve the yield of low-carbon olefins and low-carbon aromatics. The second regeneration catalyst cooler is arranged on the second regeneration inclined pipe, which can flexibly adjust the catalyst activity and concentration in the down-flow bed reactor, significantly increase the catalyst-oil ratio, improve the yield of low-carbon olefins and low-carbon aromatics, and reduce the yield of methane hydrogen and coke. In addition, the high-temperature reaction oil gas quencher arranged in the system of the present disclosure can quickly reduce the temperature of the reaction oil gas, avoid the safety hazards caused by excessive thermal cracking and condensation coking of the reaction oil gas in the reactor outlet large oil gas pipeline, and effectively utilize the heat in the high-temperature reaction oil gas.

The utility model provides a two-way filter for high-pressure methane hydrogen fuel gas, which comprises a barrel with an opening at the upper part, a filter element arranged in the barrel and an easily-opened filter head for sealing the opening, and the barrel is provided with a forward inlet, a forward outlet and a drain outlet. The upper end of the filter element extends to a position close to the opening, and the lower end of the filter element is communicated with the forward outlet through a forward outlet pipe; the gland and the base are arranged at the upper end and the lower end of the filter screen structure, the pull rod is used for fixing the filter element, and the reverse sewage collection cavity is formed in the filter screen structure. The bidirectional filtering system is additionally provided with an air inlet and outlet bypass, and the filtering direction is controlled by controlling a valve of a main bypass. According to the utility model, an internal filter element bidirectional filtering principle is adopted, so that the whole bidirectional filtering system keeps continuous filtering and is not influenced by one-way blockage.

The application discloses a breath methane and hydrogen synchronous detection method and system based on an improved gas sensor, and relates to the biomedical detection field.The method comprises the following steps: using the improved gas sensor to synchronously collect a breath flow signal and a sensor original electric signal at a set sampling rate; identifying a breath alveolar air plateau according to the breath flow signal, and intercepting a corresponding sensor original signal segment; performing filter denoising and baseline correction preprocessing on the sensor original signal segment of the plateau; based on the hydrogen and methane response time difference amplified by the gas diffusion delay structure of the improved gas sensor, extracting a first characteristic quantity related to the hydrogen concentration and a second characteristic quantity related to the methane concentration from the preprocessed plateau signal segment; and calculating and outputting the hydrogen concentration value and the methane concentration value according to the first characteristic quantity and the second characteristic quantity.The application can synchronously detect breath methane and hydrogen based on the sensor diffusion delay structure, and has the advantages of low cost, portability and high detection reliability.