1698results about "Gaseous fuels" patented technology

The invention discloses a system and a method for classified sewage treatment, and belongs to the technical field of environmental engineering and water treatment. The system comprises the following components: an intelligent water quality detection module, which is used for real-time and accurate monitoring of COD, BOD, ammonia nitrogen, total phosphorus, suspended matter concentration and heavy metal content; the sectional bioreactor realizes deep removal of nitrogen and phosphorus and efficient biological treatment by flexibly adjusting reaction conditions of each section; the intelligent flocculation control module is used for automatically and accurately adjusting the adding amount of a flocculating agent, and is combined with integrated operation of efficient inclined tube precipitation and sludge concentration, so that the water quality of discharged water is stable, and the medicament consumption is reduced; the ultrafiltration membrane bioreactor effectively removes residual suspended matters and colloids, and ensures that the effluent stably reaches the standard for a long time through the synergistic effect of catalytic ozonation; and the sludge treatment module is used for realizing collaborative optimization management of sludge reduction, recycling and energy recycling.

A process and / or system for processing a pressurized gas mixture by membrane separation. Portions of the pressurized gas mixture are withdrawn and provided as a plurality of pressurized gas streams at successively lower pressures. Each portion, provided as a respective pressurized gas stream, is provided for processing in a respective membrane system, each of which is at a different pressure level. Partially purified streams produced by one or more membrane systems are provided for processing at lower pressure levels (e.g., where they are combined with one of the pressurized gas streams). Accordingly, costs associated with recycle compression are reduced and / or eliminated.

The present disclosure relates to a carbon dioxide capture apparatus and process combined with biogas upgrading, and there is provided the carbon dioxide capture apparatus combined with biogas upgrading for simultaneously obtaining high purity methane and carbon dioxide, and improving separation efficiency without an additional process by making use of gas streams after a liquefaction process, and recovering cold heat in the process.

The utility model relates to desulfurization equipment, belongs to the technical field of natural gas desulfurization, and particularly relates to desulfurization equipment for natural gas, which comprises a shell, a rotating pipe is rotatably connected to the top of the shell, and an external pipe is rotatably connected to the top end of the rotating pipe; through the arrangement of the desulfurization mechanism, natural gas is guided into liquid medicine through a gas inlet pipe and a movable pipe, so that the natural gas is in contact with the liquid medicine and is desulfurized, a motor drives a rotating pipe, a liquid spraying pipe and a liquid spraying head to rotate through two gears, so that the liquid spraying head uniformly sprays liquid, and the rotating pipe rotates to drive a fixed rod and a stirring rod to rotate; the stirring rod rotates to scatter natural gas bubbles, the stirring rod rotates to drive a vertical rod to rotate, the vertical rod rotates to drive a movable pipe and a jet head to stretch out and draw back through a strip-shaped ring, natural gas can make uniform contact with liquid medicine, the natural gas can make full contact with the liquid medicine, and the problem that the sprayed liquid medicine cannot make full contact with the natural gas is solved. The desulfurization effect on the natural gas is not ideal.

A system for separating a gas mixture is provided. The system includes a source of a gas mixture and a membrane separation stage including a gas separation membrane module. The membrane separation stage is in fluid communication with the source of the gas mixture, and the gas separation membrane module is configured to separate the gas mixture into a retentate stream and a permeate stream. The gas separation membrane module also includes a membrane having a permeate side and a retentate side. A sweep stream is provided to the permeate side of the membrane, the sweep stream comprising a portion of the retentate stream.

Disclosed are multi-cartridge hollow fiber membrane apparatuses and methods for gas separation using them. Each external pressure type membrane apparatus contains one or more series of cartridges wherein the cartridges within each series are arranged sequentially. The retentate gas generated by each preceding cartridge in the series is used as a feed gas to the next cartridge in the series, and the permeate gas generated by a cartridge following the first cartridge in the series is used as a sweep gas on the permeate side of the preceding cartridge. The multicomponent gas mixture is separated into one or more products by the method of the invention with improved product recovery and / or product purity.

The invention discloses non-contact natural gas dehydration heating equipment, and relates to the technical field of natural gas processing. The first spiral heating pipe and the second spiral heating pipe which are spirally and crossly arranged are arranged in the isolation heating barrel, so that sufficient heat exchange is realized in the natural gas conveying process. Natural gas and high-temperature water are heated in an isolated mode, water mist carried in the natural gas can be effectively evaporated, and the water-vapor separation efficiency is improved. Compared with the traditional single-stage heat exchange pipeline design, the staggered spiral pipe increases the heating area and the heat transfer path, so that fine water mist particles in natural gas can be completely gasified, and a good premise is provided for subsequent condensation separation; and the condensation separation sheet adopts a rotary structure, and the surface is provided with a groove, so that the condensation area and the water drop adhesion capability are obviously increased. Meanwhile, centrifugal force is generated in the rotating process of the separating pieces, condensate water can be rapidly thrown away from the surface, enters the collecting tank and is guided to the water storage pond, and water drops are prevented from being mixed into natural gas again.

A gas separation system for producing a CH4-enriched gas from a feedstock gas containing CO2 and CH4, including a first gas separation membrane unit and a second gas separation membrane unit, in which the gas separation system includes a feedstock gas supply line connected to a gas inlet of the first gas separation membrane unit; a compression part disposed in the feedstock gas supply line; a first line connecting the retentate gas outlet of the first gas separation membrane unit and the gas inlet of the second gas separation membrane unit; a second line connecting the permeate gas outlet of the second gas separation membrane unit and the feedstock gas supply line; and a cooling part for lowering the operating temperature of the second gas separation membrane unit below the operating temperature of the first gas separation membrane unit.

The invention discloses purification equipment for a natural gas wellhead, and belongs to the technical field of natural gas. The air inlet pipe is assembled at the air inlet of the purification box; the air outlet pipe is assembled at the air outlet of the purification box; and a collecting frame and an annular frame are fixedly connected to the interior of the purifying box. The efficient self-cleaning of the filter screen is realized through the synergistic effect of the innovative rotary scraper blade and the vibration mechanism. The scraping plate can directly scrape impurities on the surface of the filter screen in the rotating process, the built-in reciprocating lead screw drives the scraping block to move up and down, and three-dimensional cleaning is formed. Meanwhile, through the linkage design of a fixed block and a movable rod, a spring B and a vibration rod are matched, so that the filter screen generates periodic vibration, and impurities attached to the deep layer are effectively shaken off. The dual cleaning mechanism of mechanical scraping and high-frequency vibration remarkably improves the filtering efficiency, and the problem of blockage caused by impurity accumulation of traditional purification equipment is solved.

The invention belongs to the technical field of oil and gas exploitation, and relates to a nanometer desorbing agent for a gas well and a preparation method thereof.The desorbing agent is prepared by using biochar subjected to special pretreatment as a core carrier, loading bimetallic oxide nanoparticles in a specific proportion and carrying out surface modification with an environment-friendly surface active agent. Through the synergistic effect of the nanometer size effect, the catalysis / electron transfer effect of the metal oxide, the physical adsorption and pore transport effect of the biochar and the interfacial tension reduction effect of the surfactant, the adsorption energy barrier of gas molecules such as methane on the rock surface is remarkably reduced, and efficient desorption of the gas molecules is promoted. Meanwhile, all the components and the preparation process are environment-friendly and harmless to a human body.

The invention relates to the technical field of special polymer functional membranes, and discloses a polybenzimidazole gas separation membrane as well as a preparation method and application thereof, the polybenzimidazole gas separation membrane has an interpenetrating network-shaped pore structure, and the polybenzimidazole gas separation membrane has a nanoscale pore structure. The pore size distribution of the nanoscale pore structure is 0.1-30 nm, and the average pore size of the nanoscale pore structure is 1-80 nm. The polybenzimidazole gas separation membrane has an interpenetrating network-shaped pore structure and a nanoscale pore structure, so that the polybenzimidazole gas separation membrane has relatively high gas selectivity and permeability coefficient and also has relatively good mechanical properties.

The invention discloses a system and method for producing hydrogen-rich fuel gas by coupling concentrating solar energy with biomass chemical looping gasification, and the system comprises a concentrating module which is used for concentrating solar energy to a fuel reactor; the fuel reactor is arranged at the focal plane of the condensation module and is used for reacting the biomass with the oxygen carrier solid particles to obtain synthesis gas and reduced oxygen carrier solid particles; the water vapor reactor is used for oxidizing the reduced oxygen carrier solid particles to generate hydrogen and oxidized oxygen carrier solid particles, and feeding the oxidized oxygen carrier solid particles into the fuel reactor to circulate and react with the biomass; and the synthesis gas regulator is used for receiving the synthesis gas and the hydrogen to obtain hydrogen-rich fuel gas. Energy is provided for the fuel reactor through the condensation module, oxygen carrier regeneration cycle is completed through the water vapor reactor, and the problems of nitrogen mixing and synthesis gas dilution caused by the fact that energy is provided by an air reactor in the prior art are solved.

A hydrogen production system for producing a hydrogen gas product includes a geologic hydrogen source configured to provide a feedstock comprising hydrogen, nitrogen, and helium and purification equipment comprising two or more of: a pressure swing adsorption (PSA) device; a guard bed; a separation membrane; a reactive membrane; or a cryogenic separation device. The purification equipment is configured to receive the feedstock from the geologic hydrogen source and produce a hydrogen gas product, and production of the hydrogen gas product exhibits a carbon intensity score less than 3.0 kg CO2 eq / kg H2.

The invention discloses a natural gas hydrate generation accelerant containing amino acid and nano calcium carbonate as well as a preparation method and application of the natural gas hydrate generation accelerant, and belongs to the technical field of natural gas hydrates. The problems of low natural gas hydrate forming rate, low gas storage density, low natural gas recovery efficiency, poor environmental protection property and the like in the prior art are solved. The accelerant is obtained by taking a hydrophobic amino acid solution as a base solution, adding nano calcium carbonate into the base solution and adjusting or not adjusting the pH value. By regulating and controlling the type and the concentration of a base solution in the accelerant, the hydrate formation rate and the gas storage density are improved, and the induction time of hydrate generation is shortened; nanoparticles in the accelerant are small in particle size and large in specific surface area, so that disturbance and convective heat transfer of the accelerant are enhanced; in addition, the chemical components of the nanoparticles in the accelerant and the main component of the seabed sediment with a large amount of natural gas hydrate in the nature are calcium carbonate, the environmental risk is reduced, and the calcium carbonate and hydrophobic amino acid are wide in source and environmentally friendly.

The invention provides a liquid sulfur removal agent and a preparation method thereof, and belongs to the technical field of natural gas hydrogen sulfide removal treatment.The liquid sulfur removal agent comprises, by weight, 36-66% of s-triazine derivatives, 5-8% of sulfolane, 2-5% of a pH control agent, 10-12% of a stabilizer, 5-8% of a scale inhibitor, 1-2% of a bactericide and the balance deionized water; wherein the s-triazine derivative is selected from a mixture of hexahydro-1, 3, 5-triacetyl-hexahydros-triazine, 1, 3, 5-triacetyl-hexahydros-triazine and 1, 3, 5-triazinane-2, 4-diketone, and the structural formula of the s-triazine derivative is shown in the description. The liquid sulfur removal agent is high in sulfur removal efficiency, good in corrosion inhibition and sterilization performance and not prone to scaling.

Hydrate inhibitor and corrosion inhibitor composition are disclosed and include from about 10 wt-% to about 99.9 wt-% of an anti-agglomerant low dose hydrate inhibitor (AA-LDHI), wherein the AA-LDHI is a zwitterionic compound or a cationic ammonium compound; from about 0.01 wt-% to about 50 wt-% of a corrosion inhibitor, and at least one additional functional ingredient, solvent, or a combination thereof. Methods for inhibiting corrosion and formation of gas hydrate agglomerants in a fluid are disclosed and include contacting the fluid with a hydrate inhibitor and corrosion inhibitor composition or contacting the fluid with an AA-LDHI, wherein the AA-LDHI is a zwitterionic compound or a cationic ammonium compound, and a corrosion inhibitor, wherein the AA-LDHI and corrosion inhibitor are provided at a weight ratio of about 1:0.001 to about 1:1, and wherein the composition inhibits general and localized corrosion and formation of gas hydrate agglomerants in the fluid.

The molecular sieve adsorption device comprises a bottom plate, the upper surface of the bottom plate is fixedly connected with a supporting seat, the upper surface of the supporting seat is fixedly connected with a natural gas dehydration pipeline, and the left side face of the natural gas dehydration pipeline is fixedly communicated with a gas inlet pipeline. The right side face of the natural gas dehydration pipeline fixedly communicates with a gas outlet pipeline, a heater is arranged below the natural gas dehydration pipeline, the output end of the heater fixedly communicates with an input pipe, and the top end of the input pipe fixedly communicates with the outer surface of the natural gas dehydration pipeline. Through cooperation of the heater, the input pipe, the output pipe, the nitrogen refrigerator, the first pipeline and the second pipeline, a molecular sieve in the natural gas dehydration pipeline adsorbs moisture in natural gas, when moisture in the molecular sieve is adsorbed out, the heater is firstly used for evaporating moisture, and then the nitrogen refrigerator is used for cooling; the adsorption treatment on the moisture in the molecular sieve is realized.

A system for producing gas hydrate starting from a flow of unpurified water, comprising a multiphase multistage pump which receives at a main inlet, defining a first stage the flow of unpurified water and at a secondary inlet, defining an intermediate stage, a substance in gas state to form the hydrate. The pump is configured to increase the pressure of fluids and deliver pressurized fluids to a reactor which is configured to generate gas hydrate starting from the pressurized fluids. The reactor is configured to deliver fluid comprising gas hydrate, unreacted substance and / or water to a separator which has at least two outlets: a first (main) outlet which outputs gas hydrate and a second (secondary) outlet fluidly coupled to the secondary inlet and which outputs unreacted substance and / or water.

The invention designs an environment-friendly blowout device suitable for a high-salinity gas well, and belongs to the technical field of unconventional petroleum and natural gas extraction. The device comprises a two-stage concentric liquid remover and a combustion purification system which are connected in sequence. The two-stage concentric liquid remover realizes efficient separation of gas, liquid and solid phases through two-stage centrifugal separation. And a self-adaptive liquid discharge and gas control mechanism is arranged at the bottom of the two-stage concentric liquid remover, so that flow fluctuation self-adaptive sealing can be realized. Pretreated gas enters a combustion tank, is discharged through a torch pipe and is ignited, and generated combustion gas and solid particles are sprayed and purified in all directions and sprayed liquid is recycled through a spraying and recycling device above the combustion gas and the solid particles. The device integrates multiple technical functions such as buffering and pressure stabilizing, multi-phase separation, all-directional spraying purification, fire-liquid isolation, flow fluctuation self-adaption, automatic sealing, explosion prevention and fire retardance, the three-phase separation efficiency is remarkably improved, salting-out particles entering the environment are reduced, and equipment and technical supports are provided for green development of a hypersalinity gas well.

The application discloses a preparation method of a carbon molecular sieve adsorbent for methane-nitrogen separation. The method comprises the following steps: 1) grinding graphite powder and placing the same in a metal salt solution, drying after sufficient stirring to obtain modified graphite; 2) placing phenolic resin powder in a metal salt solution, drying after sufficient stirring to obtain modified resin; 3) mixing the modified graphite and the modified resin, adding tar into the mixture, kneading and then extruding into a strip shape; 4) sufficiently drying the formed material, then transferring the material into a gas atmosphere calcination furnace, and calcining the material under an inert gas atmosphere for a certain time; and 5) performing programmed temperature heating on the obtained material under an inert gas atmosphere, introducing a carbon source, and depositing pyrolytic carbon on the surface of the material by a gas phase deposition method to obtain a carbon molecular sieve adsorption material. The carbon molecular sieve material is used as an adsorbent by adopting a pressure swing adsorption technology, has high adsorption capacity for nitrogen and high methane-nitrogen selectivity in methane-nitrogen separation application, and has a good industrial application prospect.

The invention discloses a preparation method of a negative electricity microenvironment MOF (Metal Organic Framework) carbon capture material, the carbon capture material takes a Cu-AD-xF material with a negative electricity microenvironment as a filler and polyether block polyamide Pebax as a polymer matrix, and the carbon capture material is formed by physically blending the filler and the polymer matrix at normal temperature. The invention also discloses the negative electricity microenvironment MOF carbon capture material prepared by the preparation method and application thereof. The negative electricity microenvironment MOF carbon capture material can realize selective recognition of CO2 in a mixed matrix membrane, so that CO2 / CH4 mixed gas is effectively separated.

The invention provides rare earth based hexaaluminate, a preparation method thereof and a methane combustion catalyst. The general formula of the rare earth based hexaaluminate is AByAl12-yO19, A is a rare earth element and / or an alkaline earth metal element, B is a transition metal element, and y is more than 0 and less than 12. By introducing the rare earth element and / or alkaline earth metal, the stability of a hexaaluminate skeleton is enhanced, and the high temperature resistance of the hexaaluminate skeleton is further improved; and meanwhile, the transition metal is used for partially replacing Al < 3 + >, so that the catalyst has better high-temperature catalytic activity when being applied to catalytic methane combustion, and the methane catalytic combustion reaction temperature can be obviously reduced.

The invention discloses an oil and gas exploitation associated gas intelligent recovery device, and relates to the field of oil exploitation, the oil and gas exploitation associated gas intelligent recovery device comprises a tank body used for providing a separation space, a separation pipe used for conveying separated gas and a baffle used for breaking descending liquid drops are rotatably arranged in the tank body, and a connecting rod is arranged between the separation pipe and the baffle; and the power assembly is used for driving the separation pipe and the baffle to rotate synchronously. According to the intelligent recovery device for the oil and gas exploitation associated gas, in the gas-liquid separation process of the associated gas, the power assembly drives the separation pipe and the baffle to rotate synchronously, and therefore the beneficial effects that firstly, the action positions of the separation pipe and the baffle can be continuously replaced, local abrasion of the separation pipe can be avoided as much as possible, and the recovery efficiency of the associated gas is improved; and secondly, in the rotating process of the connecting rod, the connecting rod can collide with falling liquid drops, so that the gas-liquid separation effect can be improved.

The utility model relates to the technical field of natural gas production, in particular to natural gas desulfurization and decarbonization equipment which comprises a supporting table and a natural gas impurity removal assembly, the natural gas impurity removal assembly comprises a separation tank, a gas inlet pipe, a one-way valve, a conveying pipe and a protection valve, and the separation tank is detachably connected with the supporting table and located above the supporting table; the gas inlet pipe is fixedly connected with the separation tank and located on one side of the separation tank, the one-way valve is fixedly connected with the gas inlet pipe and located in the gas inlet pipe, the conveying pipe is fixedly connected with the separation tank and located on the side, close to the gas inlet pipe, of the separation tank, and the protection valve is fixedly connected with the conveying pipe and located in the conveying pipe. Therefore, the problems that in the prior art, a multi-filtering mechanism cannot rapidly separate sulfide, a certain time is needed to naturally separate sulfide in natural gas, and practicability is low are effectively solved.

Described are compositions including a reaction product of an amino alcohol and an aldehyde and a reaction product of a monohydric or polyhydric alcohol, an aldehyde and a nitrogen-containing compound. In addition, processes for removing sulfur compounds from process streams using such compositions are described, as well as such processes in which the process stream is contacted independently with a reaction product of an amino alcohol and an aldehyde and a reaction product of a monohydric or polyhydric alcohol, an aldehyde and a nitrogen-containing compound. Further described is the use of such compositions to remove sulfur compounds from process streams and the use of a reaction product of an amino alcohol and an aldehyde and a reaction product of a monohydric or polyhydric alcohol, an aldehyde and a nitrogen-containing compound to remove sulfur compounds from process streams.

To provide an economically advantageous method for producing a high calorific value fuel gas, capable of obtaining the high calorific value fuel gas with a high methane concentration that can be used as a raw material for a city gas without using costly carbon dioxide separation equipment when obtaining a methane main component gas with the high calorific value that can be used as the city gas by a methanation reaction of ethanol.SOLUTION: A method for producing a high calorific value fuel gas comprises: a step of adjusting a raw material gas by adding hydrogen and water vapor to ethanol such that a hydrogen / ethanol molar ratio is 2.0 or more to 2.5 or less and a water vapor / ethanol molar ratio is 1.2 or more to 4 or less; a steam reforming step of bringing the raw material gas into contact with a catalyst containing ruthenium or nickel at 300°C or higher to 700°C or lower; and a methanation step of bringing a gas obtained in the steam reforming step into contact with the catalyst containing ruthenium or nickel under conditions where a catalyst outlet temperature is 230°C or higher to 330°C or lower.SELECTED DRAWING: Figure 1

The invention discloses an intelligent pressure self-adaptive adjusting system in LNG low-temperature dealkylation and a fractionation method, and relates to the technical field of LNG low-temperature dealkylation. The pressure change in the LNG low-temperature dealkylation process is monitored in real time, detection data are transmitted to a control system in real time, the stability and low delay of data transmission are ensured, an early warning signal is automatically triggered when abnormal fluctuation is detected, and therefore the reliability of the system is improved, and the response speed is adjusted; the intelligent control unit is used for processing pressure data in real time, ensuring the real-time performance and accuracy of analysis, automatically triggering a correction program when detecting data abnormity or algorithm deviation, generating an accurate adjustment instruction and sending the adjustment instruction to the execution unit so as to adjust the opening degree of a valve or the pump speed, so that the rapid response of pressure self-adaption and the improvement of the overall reliability of the system are realized; the temperature compensation unit corrects a pressure measurement value in real time according to sensor data, errors caused by temperature fluctuation are eliminated, and the accuracy of pressure self-adaptive adjustment and the system stability are ensured.

A treatment composition for remediating for remediating hydrogen sulfide (H2S), carbon dioxide (CO2) and other contaminant(s) in a fluid, including: an organic or hydrocarbon based liquid; at least one hydroxide compound or a hydrate thereof; and sodium sulfide (Na2S) or a hydrate thereof.

A system, comprises: a regenerative unit configured to receive a compressed fluid stream and generate a treated fluid stream based on the compressed fluid stream; one or more membrane separation units configured to generate a methane-rich stream and a permeate recycle stream based on the treated fluid stream; and a volatile organic compounds (VOC) polishing bed configured to receive the permeate recycle stream and remove organic compounds from the permeate recycle stream to generate a VOC treated stream, wherein the system is configured to route the VOC treated stream from the VOC polishing bed downstream of the regenerative unit, and processes relating thereto.

The utility model relates to the technical field of separating devices, and discloses an oiling multiphase flow separator which comprises a separating tank, a connecting ring is movably connected to the left side of the upper surface of the separating tank, a demister is fixedly connected to the top end of the connecting ring, and a driving plate is fixedly connected to the right side of the outer surface of the connecting ring. By arranging the connecting ring, the demister, the driving plate, the cylinder and the moving block, when the first motor starts to operate, the threaded rod starts to rotate, the moving block is driven by the rotation of the threaded rod, so that the moving block and the cylinder start to move back and forth under the driving of the threaded rod, and meanwhile, the driving plate is driven by the movement of the cylinder; therefore, the driving plate, the demister and the connecting ring start to rotate along the inner surface of the notch ring, and the demister is in active contact with the oil fog drops due to rotation of the demister, so that the removal efficiency of the demister on the oil fog drops in the natural gas is improved.