37 results about "Methane air" patented technology

The invention uses apparatus, methods or systems, e.g., fine pore diffusers (18), to saturate ground water with a gas, preferably oxygen, but also possibly methane, air, inert or noble gasses and / or carbon dioxide. The pore diffusers (18) can be in a ring of aeration injection wells (16) in a large concentric ring around a production well. By increasing the dissolved oxygen level in the ground water, undesirable constituents such as iron or arsenic are lowered in concentration. Methods can be employed to optimize the ground water treatment by injection of other substances, such as iron, as well as predict, model, design, monitor and maintain the treatment process.

The invention provides a hydration reactor and a method for using the reactor to separate methane in air-mixed coalbed methane. The hydration reactor has the following structure: the cavity of the hydration reactor has a narrowing section, a throat The flow areas of the pipe section, the expansion section, the stabilization section, and the throat section are all smaller than those of the shrinkage section, the expansion section, and the stabilization section, and the chamber of the hydration reactor is provided with an air inlet corresponding to the side wall of the throat section. The hydration reactor provided by the present invention utilizes the principle of fluid mechanics, utilizes the flow and pressure variation rules of the hydrate working fluid at different positions in the reactor, and realizes the processes of suction, self-boosting and hydration separation of mixed air coalbed methane , which avoids the danger of explosion in the process of pressurizing and conveying mixed air coalbed methane, and has the advantages of safe operation and strong feasibility for practical industrial application.

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 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 discloses a pore-enlarged nickel oxide-calcium oxide / alumina composite catalyst, and a preparation and application thereof. The composite catalyst comprises CaO prepared from thermolysis of a precursor nano calcium carbonate, an Al2O3 carrier using an aluminium sol as an aluminium source and NiO prepared from thermolysis of nicdel nitrate, wherein a mass ratio of CaO:Al2O3:NiO equals to 1:(0.3-3.0):(0.1-0.5). The composite catalyst has a porous structure, an aperture of 5-15nm and a specific surface area of 20-75m<2> / g, and is prepared by well mixing the pore-enlarging agent slurry, alumina hydrosol, nano calcium carbonate particles and a nicdel nitrate aqueous solution, drying and roasting. The composite catalyst has obvious increased specific surface area, pore volume and aperture, and an obvious improved hydrogen production activity. Besides, the composite catalyst has a good hydrogen production activity and stability when applied to a ReSER process, a high methane air speed and high efficiency in hydrogen production.

The present invention relates to the field of water treatment, in particular to a domestic sewage comprehensive utilization system based on black ash diversion, which includes an anaerobic fermentation tank, a methane air bag and a water tank; the anaerobic fermentation tank is provided with a stirring device, and the stirring device The stirring impeller is arranged in the inside of the anaerobic fermentation tank, and the stirring impeller is connected to the power mechanism outside the anaerobic fermentation tank through the stirring shaft, and the anaerobic fermentation tank is connected through the middle water pipeline I; the position of the water tank is higher than that of the anaerobic fermentation tank. Oxygen fermentation tank, the bottom of the water tank is provided with a power pipeline, the power pipeline is connected to the power mechanism, the water flow in the power pipeline drives the power mechanism, and the power mechanism drives the stirring impeller to work; the methane in the methane air bag is used for gas water heaters, the life of the present invention The anaerobic fermentation tank in the sewage comprehensive utilization system also effectively utilizes the gravitational potential energy of gray water, and provides kinetic energy for the agitation of the anaerobic fermentation tank through the flow of gray water. This system reduces the input of external energy and reduces energy consumption.

The invention is an improved method of making a carbon molecular sieve (CMS) membrane in which a precursor polymer is pyrolyzed to form a carbon molecular sieve membrane that is then exposed to a conditioning atmosphere comprised of a target permeate gas molecule such as ethylene when the membrane is desired to separate it from a light hydrocarbon gas stream. The exposure to the ethylene desirably occurs prior to the CMS permeance and selectivity combination substantially changing (e.g., within 5 days) of cooling from the pyrolyzing temperature. The CMS membranes have shown an improved combination of selectivity and permeance as well as stability and are useful to separate gases in gas streams such methane from natural gas, oxygen from air and ethylene or propylene from light hydrocarbon streams.

The invention discloses a partitioned methane oxidation-denitrification reactor and a method thereof. A cover plate is arranged at top of the reactor, a separator plate is arranged at the center of the cover plate and divides the reactor into two parts. A left side of the reactor is a methane zone, a water inlet pipe is arranged at center of 1 / 3 part of the left side of the cover plate close to the separator plate, a methane air inlet pipe is arranged at the left side of the water inlet pipe, and a methane zone water outlet pipe is arranged at the right side of the water inlet pipe. A methane discharger is arranged at center of 1 / 3 part of the left side of the cover plate close to the edge. An aeration head is arranged at bottom center of the left side of the reactor and is connected to the methane air inlet pipe. An oxygen zone is arranged at the right side of the reactor, an oxygen air inlet pipe, the aeration head, an oxygen discharger and an oxygen zone water outlet pipe are arranged, and are symmetrically distributed to each corresponding structure at the left side by taking the separator plate as a symmetrical plane. According the invention, independent supply of methane and oxygen can be realized, and the blast risk brought by mixing supply can be avoided. Simultaneously, the methane proportion in the outlet gas from the methane zone can be increased by more than 75%, and the outlet gas can be taken as a fuel; methane proportion in the outlet gas from the oxygen zone is lower than blast limitation, and then the outlet gas can be directly discharged.

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 relates to a method for preparing gamma-Fe2O3 nanometer wire filling carbon nitrogen multi-wall nanometer tubes through one-step reaction. Particularly, the invention belongs to a method for preparing metal oxide nanometer wire filling carbon nitrogen nanometer tubes under the condition of the existence of FeNi (50 percent of Fe and 50 percent of Ni in mass percent) catalyst thin films in the plasma body chemical gas phase deposition process of paraffin gas (preferably methane), air and hydrogen (according to a flow rate ratio of 80 / 10 / 20 with the unit of ml / minute in a standardstate). The products prepared by the invention have good orientation effect and high yield. The single crystal nanometer wires filled to the inside have ferrimagnetism, and the multi-wall tubular structures at the outer layer have the special nitrogen doped bamboo joint type structures. The invention has the advantages of simple method, one-step completion, easy control and convenient industrial production. The prepared magnetic nanometer materials have wide application prospects in the fields of biological medicine, field generation devices, catalytic materials and the like.