37 results about "Methane air" patented technology

A robust, high temperature mixed metal oxide catalyst for propellant composition, including high concentration hydrogen peroxide, and catalytic combustion, including methane air mixtures. The uses include target, space, and on-orbit propulsion systems and low-emission terrestrial power and gas generation. The catalyst system requires no special preheat apparatus or special sequencing to meet start-up requirements, enabling a fast overall response time. Start-up transients of less than 1 second have been demonstrated with catalyst bed and propellant temperatures as low as 50 degrees Fahrenheit. The catalyst system has consistently demonstrated high decomposition effeciency, extremely low decomposition roughness, and long operating life on multiple test particles.

The invention discloses a methane air floating anaerobic reactor, which comprises an anaerobic bioreactor body (3), wherein a waste water inlet pipe (1), a waste water distribution device (111), a sludge expanding bed region (2), a three-phase separator (4) and a clarified water outlet pipe (5) are sequentially distributed in the anaerobic bioreactor body (3) from bottom to top; an anaerobic air floating reaction region (16) is arranged above the three-phase separator (4), and is provided with a methane outlet pipe (8) and a return pipe (51) which extend outside the anaerobic bioreactor body so as to be connected with a dissolved air water preparation system (9); the dissolved air water preparation system (9) is connected with an air bubble releaser (12) above the three-phase separator (4) through a dissolved air water inlet pipe (10); and an air floating protection cover (11) is arranged on the air bubble releaser (12). The methane air floating anaerobic reactor integrates anaerobism, condensation, air floatation, drossing, sedimentation and sludge scraping into a whole. The COD (Chemical Oxygen Demand) removal efficiency is increased by 50 percent, and the equipment investment is reduced by 30 percent.

The invention belongs to the technical field of environmental protection processing devices, and relates to an air flow and machinery double-boosting internal circulation-type high suspension solid anaerobic digestion device. The device comprises a material charging pipe, an internal cylinder section, an external cylinder section, a three-phrase separation section, a mixing section, a water discharging pipe, a sludge discharging pipe, a methane collecting pipe, a sampling detection port and the like. The material charging pipe sends suspension solid to the internal cylinder section directly; in the internal cylinder section, anaerobic sludge and the suspension solid are mixed and elevated through double power actions of generated rising methane air flow after reaction and mechanical blade boosting; then the mixed liquid goes into the three-phrase separation section; in the three-phrase separation section, waste water overflows and is discharged by the water discharging pipe, methane rises up and goes into the methane collecting pipe, the sludge settles and goes into the mixing section through the external cylinder section, part of the sludge goes into the internal cylinder section under the action of the above thrust and forms internal circulation, and the excess sludge is discharged by the sludge discharging pipe. The device can be used for processing of waste water containing high suspension solid, residual sludge, household garbage and the like. The device has remarkable social, environmental and economic benefits.

The invention provides a separation method of methane from coal bed methane-air mixture and a system thereof. The separation method includes a step of performing a hydration reaction to the coal bed methane-air mixture and collecting methane-rich gas. A hydration reactor for the hydration reaction has a structure that a chamber in the hydration reactor is divided into an inlet section, a throat tube section and a stable section in the flowing direction of a hydrate work fluid, wherein the flow area in the throat tube section is less than that of the inlet section and the stable section. A gas inlet is formed in the side wall corresponding to the throat tube section in the chamber of the hydration reactor. By means of the separation method, a step of compressing and pressurizing the coal bed methane-air mixture when the methane is separated from the coal bed methane-air mixture through a hydrate separation method in the prior art, thereby avoiding risk of explosion during compressing and high-pressure flowing processes of the coal bed methane-air mixture. The method is safe in operation and is excellent in practical industrial application availability.

The invention provides a biomass energy generation device suitable for use in a cold region. Wastes are pretreated in a pretreatment pond (11), liquid to be treated after pretreatment is divided into two gushes through a pump (9), wherein, one gush can be directly introduced into a water mixing valve (7), and the other gush is introduced into the water mixing valve and mixed with cold water after heated by a heating system, a control system keeps track of the temperature of cold and hot water so as to regulate the flow rate of the cold and hot water, so that the liquid to be reacted in the water mixing valve can maintain at constant temperature, and the liquid to be treated is introduced into a main reactor (1) for reacting; after reaction, sewage is introduced into an aerobic treating pond (12), the sewage is treated and the clean water is introduced back into the pretreatment pond, the gas from the main reactor (1) enters into a methane air storage chamber (14). The biomass production capacity device of the invention can effectively treat solid waste, can generate biogas and hydrogen at the same time, and effectively reduces energy consumption, so as to realize waste water cycling and cycle operation in four seasons systematically.

The invention relates to an experimental device and method for restraining gas explosion flame propagation of a branch roadway by a composite negative pressure cavity. An experiment system comprises an experimental branch pipeline, the compound negative pressure cavity, a methane-air premixed gas distribution device, an ignition device, a sensor and a data acquisition and measurement device; the experimental pipeline is composed of a three-way branch pipeline and three straight pipelines; the three-way branch pipeline is divided into a horizontal end and a branch end; a rupture disk is arranged at an inlet of the negative pressure cavity; and by utilizing the suction effect of a negative pressure on flame and the cooling and quenching effects of a metal wire mesh on the flame, the flame propagation is restrained. The experimental device designed by the invention is convenient for argumentation and research of the situation that the performance of restraining the gas explosion flame propagation of the branch pipeline by the negative pressure cavity can be improved by adding the metal wire mesh, is convenient for analysis and research of a relationship among the vacuum degree of a cavity body of the negative pressure cavity, the gas concentration, an angle of the branch pipeline and a gas explosion blocking effect, and provides a new idea for researching the restraining of the gas explosion flame propagation of the branch roadway.

The invention provides a deep coal resource underground in-situ fluidization mining method which comprises the following steps: determining a coal seam needing fluidization mining, and arranging a U-shaped well group in the coal seam; secondary transformation is conducted on the horizontal well, a plurality of horizontal branch wells are drilled along different positions of the horizontal well, and a fishbone well is built; fracturing a coal seam around the fishbone well in a manner of injecting high-pressure fluid into the fishbone well; air is injected into the fishbone well through the horizontal well; a methane-air mixture in the complex crack is ignited or detonated in an electric shock ignition mode, and a potassium permanganate solution in the complex crack is promoted to release oxygen by using a high-temperature environment generated by combustion and explosion of methane and air; in-situ conversion of underground coal is continuously carried out, and along with continuous in-situ fluidized mining, coal around the fishbone well is continuously mined in a fluidized form; and meanwhile, the combustible gas generated by conversion is separated and stored on the ground. According to the method, the working face of coal seam in-situ fluidization mining can be effectively enlarged, and the fluidization mining and conversion efficiency can be remarkably improved.

The invention provides a deep coal in-situ fluidization mining method based on heat extraction and power generation, which comprises the following steps: determining a coal seam needing fluidization mining, and arranging a U-shaped well group in the coal seam; the horizontal well is subjected to secondary transformation, and a fishbone well is built; fracturing a coal seam around the fishbone well; injecting air into the fishbone well; a methane-air mixture in the complex crack is ignited or detonated in an electric shock ignition mode, so that the coal and oxygen decomposed from potassium permanganate are subjected to a combustion reaction; in the coal seam combustion process, water is injected into the horizontal well through the water injection tubular column, and meanwhile oxygen-enriched air is injected through an annular space between the water injection tubular column and the horizontal well; water in the water injection tubular column is heated through a high-temperature environment formed in the coal combustion process, a large amount of water vapor is generated, and then the water vapor is flowback to the ground through the vertical well in the middle. According to the method, a green and environment-friendly fluidized mining process can be provided, the mining efficiency can be effectively improved, and meanwhile, the integrated development and utilization process can be achieved.

The invention discloses a coal oxidation characteristic testing device based on coal and gas cogeneration and a testing method thereof. The testing device comprises an air source, a methane air source, branched flow meters, a three-way valve, a water seal buffer, a total flow meter, a drier, a one-way air valve, a fire-retardant breather valve and a cavity, wherein an air pipe for communicating the air source and the methane air source is inserted into an air inlet of the cavity; the middle part of the cavity is provided with an explosive-proof plate and an electric heating coil connected with a temperature control system; the interior of the explosive-proof plate is provided with a micro balance tray and a temperature-sensing probe which is connected with a temperature monitor unit; the upper end of the cavity is provided with a seal cover, a bursting disc and an air outlet; and the temperature control system, the temperature monitor unit and a micro balance are connected with a data collection system. The testing device is applicable to coal oxidation characteristic research under the condition of coal and gas cogeneration, has fireproof and explosive-proof characteristics, and prevents the occurrence of a destroy condition caused by gas explosion in the testing process; the additive amount of a sample is relatively large, and the problem that the additive amount of a coal sample is too small in a traditional research method is overcome.

The invention discloses a low-ventilation-air-methane-temperature mine ventilation-air-methane residual heat extraction system. According to the system, a positive-pressure system is formed by a mineventilation-air-methane air duct (1), an air-compressor residual heat recovery system (2), a mine ventilation-air-methane dust removal chamber (3), a ventilation-air-methane heat exchange chamber (4),an air source heat pump system (5) and the like; mine ventilation air methane passes through the mine ventilation-air-methane air duct (1), and is subjected to dust removal through the mine ventilation-air-methane dust removal chamber (3), then the mine ventilation air methane subjected to dust removal is sent into the ventilation-air-methane heat exchange chamber (4), and is subjected to heat exchange through the air source heat pump system (5) arranged in the ventilation-air-methane heat exchange chamber (4), and then the mine ventilation air methane subjected to heat exchange is exhaustedinto the atmosphere. The system is characterized in that the temperature and the dust removal effect of dust-removal spray water are guaranteed by adopting the combination of a wet-method dust removalway and the air-compressor residual heat recovery system; the whole heat exchange process, in the ventilation-air-methane heat exchange chamber, of the mine ventilation air methane is in a positive-pressure state and the mine-mouth antifreezing or mining-area heat supply demand is met after the energy of the mine ventilation air methane is extracted by utilizing an ultralow-temperature air sourceheat pump host machine.

An experimental method for gas repeated explosion at simulated coal mine diagonal roadway mesh is applicable to repeated explosion study for combustible gas. A front methane-air premixing bag and a rear methane-air premixing bag are disposed in the simulated coal mine diagonal roadway mesh, combustible gas in the front methane-air premixing bag is ignited by a high-tension discharge igniter, gas explosion impact wave breaks the rear methane-air premixing bag in propagating process, gas repeated explosion occurs when a flame face behind the impact wave ignites combustible gas in the rear methane-air premixing bag, a high-frequency flame sensor and a high-frequency pressure sensor transmit a gas explosion flame signal and a pressure signal respectively to a flame data collector and a pressure data collector, and the signals are stored in a data processing unit. The method has the advantages of good operational simplicity, flexibility, diverse comprehensive functionality and the like, the process where gas initial explosion leads to secondary explosion can be visualized, and it is also possible to study how air flow varies in the coal mine diagonal roadway mesh.

The invention discloses a multifunctional triaxial experiment system and method for acoustics, electroosmosis and the like. According to the multifunctional triaxial experiment system and method, rock parameter measurement of a full-diameter rock core under the triaxial covering pressure condition at different temperatures and different pressures can be simulated; parameters such as resistivity, sound wave propagation characteristics, permeability, porosity and the like of rock can be measured, and experiments such as carbon dioxide displacement of methane, air displacement of methane, water displacement of oil and the like can be carried out; the synthesis and decomposition of hydrates can be simulated; the axial pressure pump is designed in the rock parameter measurement of the full-diameter rock core, so that the requirement of simulating the field flow conductivity test is better met; the resistivity and sound wave propagation property of the rock under different gas saturation and water saturation can be measured; and the influence of the rock micro-crack on the sound wave rebroadcasting characteristic can be tested.

The invention discloses an experimental device for inhibiting secondary explosion of coal dust by using nitrogen and dry powder, and belongs to the field of inhibition of secondary explosion of coal dust. The device comprises a gas distribution ignition system, a gas-solid explosion suppression system, a data acquisition system and an exhaust system, a pipeline is divided into a gas explosion section I, a middle section II and a coal dust filling section III through explosion venting membranes, and a gas distribution device adds methane-air premixed gas in the gas explosion section I; the ignition device ignites in the gas explosion section I, the controller of the middle section II receives pressure, temperature and flame signals of the sensor and then sprays nitrogen and dry powder, the blocking effect on primary explosion of gas is achieved, and then suppression of secondary explosion of dust induced by gas in the dust filling section III is achieved.

The invention discloses a natural gas liquefying device and method adopted in an extremely-cold region. The device comprises an ethane liquefaction refrigerating system and a methane supercooling refrigerating system. The ethane liquefaction refrigerating system comprises an ethane compressor, an ethane air cooler, an ethane condensate collection tank, a high-pressure ethane evaporator, a medium-pressure ethane evaporator, a low-pressure ethane evaporator and a low-low-pressure ethane evaporator, wherein the ethane compressor, the ethane air cooler, the ethane condensate collection tank, the high-pressure ethane evaporator, the medium-pressure ethane evaporator, the low-pressure ethane evaporator and the low-low-pressure ethane evaporator are connected in sequence. The methane supercoolingrefrigerating system comprises a natural gas supercooler, a methane compressor and a methane air cooler, wherein the natural gas supercooler, the methane compressor and the methane air cooler are connected in sequence. A purified natural gas pipeline from the outside and a methane pipeline from the methane air cooler are each sequentially connected with the high-pressure ethane evaporator, the medium-pressure ethane evaporator, the low-pressure ethane evaporator and the low-low-pressure ethane evaporator. According to the natural gas liquefying device and method, the two-stage stepwise refrigerating mode is adopted. The natural gas liquefying device and method have the traditional stepwise refrigerating technological beneficial effects and further have the beneficial effects that the technological process is simplified; a compressor unit is omitted; operation is conducted more conveniently and more rapidly; and meanwhile, localization of a refrigerant compressor, a heat exchanger andthe like is achieved.