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 discloses an argon microwave discharge plasma assisted methane and air swirling combustion device and method. Through the synergistic effect of microwave discharge and swirling combustion, under the condition of the atmospheric pressure, argon microwave discharge plasma assisted methane and air mixed gas efficient combustion is achieved. The argon microwave discharge plasma assistedmethane and air swirling combustion device comprises a microwave power source, a microwave anti-reflux device, a three-pin distributor, a conversion waveguide, a microwave resonant cavity and a swirling combustor; the microwave power source drives microwaves to discharge, and the microwaves sequentially pass through the microwave anti-reflux device, the three-pin distributor and the conversion waveguide and then enter the microwave resonant cavity to form atmospheric pressure argon microwave discharge plasma in the microwave resonant cavity; and methane and air tangently enter the swirling combustor through a gas inlet, and are combusted in the swirling combustor under assisting of the microwave argon discharge plasma.

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 relates to a test system which is used for gas repeated explosion of a simulated coal mine diagonal connection roadway net and applicable to repeated explosion study of combustible gas. The system comprises a simulated coal mine diagonal connection roadway net, two methane air premixing air pockets, a high frequency flame sensor, a high frequency pressure sensor, a high voltage discharge spark plug, a high voltage shield cable, a high voltage discharge igniter, a flame signal transmission line, a flame data acquisition device, a pressure signal transmission line, a pressure data acquisition device and a data processor. The test system provided by the invention has the advantages of simple structure, flexible combination and multiple comprehensive functions, so that a development process that secondary explosion is ignited by primary explosion of gas can be vividly represented, and change rules of air flow in a coal mine diagonal connection roadway net also can be studied.

The invention provides a multi-layer methane desulfurizer and relates to a desulfurizer which comprises a single-chamber desulfuration body; a support is placed thereunder to support the desulfuration body; the desulfuration body is internally provided with two layers or multiple layers of desulfuration layer. Desulfurizing agent such as iron oxide is placed in the desulfuration layer for desulfuration, the lower end of each layer of the desulfuration layer is provided with a gauze pad. The bottom end of the desulfuration body is provided with methane air inlet ports connected with the methane, the top end thereof is provided with air outlet ports connected with a pipeline to discharge desulfurized methane. The multi-layer methane desulfurizer has the beneficial effects of simple structure, convenient installation and capability of performing desulfuration operations for many times in a single desulfurizer, thus being very practical and easy to be promoted.

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 belongs to the technical field of methane treatment equipment and relates to heat energy recovering equipment, in particular to a methane automatic burning heat energy recovering blind fire torch. The methane automatic burning heat energy recovering blind fire torch comprises a torch cylinder body, a heat exchange inner cavity is formed in the middle of the interior of the torch cylinder body, a heat exchange coiled tube is arranged in the heat exchange inner cavity, and the water inlet end of the heat exchange coiled tube is connected with a heat exchange water inlet tube; a methane inlet tube is arranged at the bottom of the torch cylinder body, the gas inlet end of the methane inlet tube extends out of the torch cylinder body and is connected with a methane air source, and the gas outlet end of the methane inlet tube extends to the center position of the bottom of the torch cylinder body; and the gas outlet end of the methane inlet tube is connected with a plurality of burning heads through a plurality of branched gas tubes. According to the methane automatic burning heat energy recovering blind fire torch, methane generated in the sewage treatment technique can be recycled, heat energy generated through methane burning is utilized to increase the temperature of a sewage treatment anaerobic pool, thus efficiency of anaerobic degradation is improved, and energy saving and environmental friendliness are achieved; through the multiple burning heads uniformly distributed in a multi-layer mode, the flow speed of the methane of outlets of the burning heads can be decreased; and a fire barrier can prevent backfire.

The invention discloses a coal mining method of a full-negative-pressure continuous mining machine for leftover coal, and belongs to the technical field of coal mining. The problems that when a coal mining method of a continuous mining machine is adopted in leftover coal resources, full-negative-pressure ventilation cannot be achieved in a mining cave, and the yield is low are solved. The method comprises the four steps of crossheading roadway arrangement, stoping unit branch roadway arrangement, stoping unit mining and leftover coal section mining. According to the method, roadway arrangement is flexible, the resource recovery rate is high, local ventilator air supply is completely canceled during mining cave stoping, ventilation air methane air flow is prevented from returning to a stoping branch roadway, branch roadway through holes are additionally formed in a stoping unit, and ventilation management and safety are facilitated; and meanwhile, according to the coal mining method, one continuous mining machine and matched equipment are adopted for roadway tunneling and mining cave stoping, mining and tunneling are integrated, the number of newly-added personnel is small, the investment is relatively low, the coal yield is guaranteed, and good benefits can be obtained.

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.

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 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 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 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.

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 discloses a method for preparing liquefied petroleum gas by a two-step method, which comprises the following steps of: preparing the liquefied petroleum gas by a one-step method on a Gu-Zn-Al / Pd-Y composite catalyst by taking synthesis gas obtained by partial oxidation of methane and air as a raw material, under the conditions of 290 DEG C, 3.6 MPa and 1500h <-1 >, enabling the CO conversion per pass and the selection of LPG in hydrocarbons to be more than 70%, and keeping the CO conversion per pass and the LPG to be relatively stable within the reaction time of 100h. The cheap synthesis gas is directly used for the development of the liquefied petroleum gas synthesis methane air partial oxidation / liquefied petroleum gas synthesis integrated process, DME and a small amount of formaldehyde are dehydrated and converted into hydrocarbons at high temperature in the second-section reactor, high temperature accelerates the cracking of high-carbon hydrocarbons at the moment, the generation of carbon deposition is inhibited, the stability of the molecular sieve is improved, the reaction conditions of two-step preparation of the liquefied petroleum gas are optimized, the stability of the two-step process is investigated, and the two-stage catalyst is regenerated.

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.