101results about How to "Guaranteed Utilization Efficiency" patented technology

The invention discloses a resource allocation method and a device, which are used for lowering the complexity in allocation of downlink shared channel resources. The resource allocation method provided by the invention comprises the following steps of: determining physical resource block (PRB) segments consisting of continuous PRBs; selecting a subband with a highest channel quality indicator (CQI) for each PRB segment, and determining PRB resources preallocated for user equipments (UEs) according to the subbands with the highest CQIs; and comparing the PRB resources preallocated for the UEs corresponding to each PRB segment, and determining PRB resources allocated for the UEs.

The invention, belonging to the field of surface modification on materials, relates to a magnetic field for plating on inner wall of long pipe and a field-enhanced arc ion plating device, characterized in that: the magnetic field is used to restrain and control the plasma beam motion trail in the arc ion plating process, two sets of magnetic field generators are arranged in an arc ion plating deposition device, one set is arranged on the plasma transmission channel outside a vacuum chamber for using the magnetic field to focus the plasma beam and restrain the diameter of cross section and transmission efficiency when transmitting the plasma beam, and the other set is arranged on the outside of a tubular workpiece in the vacuum chamber for guiding the plasma beam to diffuse along with the central axial direction of the tubular workpiece; field enhancement is used in arc ion plating for using the magnetic field to realize accelerated directional flow of plasma, a pulsed electric field is arranged in the workpiece; the magnetic field and electric field are used to restrain and control the plasma beam, so as to realize the coating deposition of the plasma on the inner wall of the tube. The invention is suitable for depositing coatings on the inner wall of tubular workpiece which is used as the service surface.

The invention relates to an implementation method of a 3D (three-dimensional) metal printing system, in particular to a 3D metal printing method, which belongs to the technical field of 3D metal printing. In combination with a current or voltage oscillation (or resonance) circuit, the 3D metal printing method adopts a printing method like a ball pen discharging ink and a rolling bearing rolling on a surface to leave an ink print to implement the fast melting of metal powder and fine printing; because a printing head of the 3D metal printing method is a high-temperature part, which still can keep constant high temperature on a printed object like an iron, the problem that metal does not completely melt does not exist, and because of the distance of heat transfer, the printing head also naturally cannot melt the printed object surface, thus truly realizing 3D printing like painting and iron soldering on the printed object surface. Consequently, the method does not have the problem that melted liquid metal is cooled into a drop-like solid once the melted liquid metal gets out of the printing head, as well as the problem of powdery pits which is caused by the incomplete sintering of part of the printed object in the process of laser sintering formation.

The invention relates to a micro energy network system containing an air source heat pump and energy storage and an operation control method thereof. The included photovoltaic power generation deviceconverts solar energy into electric energy and is connected with an electric bus; one end of a gas engine is connected with a natural gas network and the other end is connected with the electric bus and a waste heat boiler; one end of the waste heat boiler is connected with the gas engine and one end is connected with a thermal bus; one end of a gas boiler is connected with a natural gas pipelineand the other end is connected with the thermal bus; one end of an absorption refrigerator is connected with the thermal bus and the other end is connected with a cold load through a pipeline; one endof an electric refrigerator is connected with the electric bus and the other end is connected with the cold load; one end of an air source heat pump is connected with the electric bus and one end isdirectly connected with a thermal load; an electric storage device stores or releases electric energy; a thermal storage device stores or releases thermal energy; and a cold storage device stores or releases cold energy. The coupling transformation direction of an energy flow can be adjusted, and energy supply to users is completed economically and greenly.

The invention relates to a fuse salt jet impinging heat dump which comprises an absorber (1), a high-temperature steel plate (2), inflow ports (3 and 3'), an outlet (4) and a nozzle (16), wherein the fuse salt jet impinging heat dump (8) is a of cylinder shape, and the front of the absorber (1) faces converged sunlight; the high-temperature steel plate (2) is positioned at the interior of the fuse salt jet impinging heat dump (8) and fixed on the shell of the fuse salt jet impinging heat dump (8) in welding manner, and the high-temperature steel plate (2) is embedded with the nozzle (16); an outlet of the nozzle (16) faces the back of the absorber (1), the inlet is connected with the inflow ports (3 and 3') arranged on the bottom of the fuse salt jet impinging heat dump (8); fuse salt is delivered to the inflow ports (3 and 3') through pump exhausting to flow to the nozzle (16) through a pipeline, thereby spraying to absorber (1), and the absorber (1) is subjected to jet impinging cooling so as to take away the heat; and the heated fuse salt flows out from the outlet (4) of bottom of a gap positioned between the absorber (1) and high-temperature steel plate (2).

The invention discloses a construction method of a conical concrete roof on the top of a silo. The construction method of the conical concrete roof on the top of the silo comprises the steps that the size of a bottom template of a conical roof plate is determined firstly; machining is conducted after transformation of the bottom template is completed, and sequential installation is conducted according to a transformation drawing during installation; concrete pouring is conducted in four stages; construction seams are reserved between all the stages according to actual construction requirements; and vertical transport equipment is arranged in the construction process, and a cover template with split bolts and a bottom plate in opposite pulling is adopted during vibrating of concrete. According to the construction method of the conical concrete roof on the top of the silo, the construction characteristics and processing methods of the conical roof are taken into consideration systematically, the construction quality is guaranteed, and cost for quality defect maintenance is reduced; and the material utilization rate is guaranteed, and material waste is prevented.

The invention discloses a hydrogen sulfide and carbonyl sulfide resource recycling method based on a molten salt. The method includes the following steps of (1) functional molten salt preparation, wherein a calcium salt or a barium salt is added into an alkali metal mixing molten salt system, then grinding and homogenizing are conducted, and the mixture is heated to melt to form the liquid functional molten salt; (2) hydrogen sulfide and carbonyl sulfide adsorption and enrichment, wherein the functional molten salt is heated to 450-750 DEG C, then carbon powder is added into the molten salt, and then gas with hydrogen sulfide and carbonyl sulfide is introduced into the molten salt to make the hydrogen sulfide, the carbonyl sulfide and the molten salt be in complete contact reaction; (3) sulfide recycling, wherein introduction of the gas with the hydrogen sulfide and the carbonyl sulfide is paused, the reacted molten salt system is supplemented with the calcium salt or the barium salt and stirred for mixing, then sulfide generated by reaction still stands for precipitation, and finally the sulfide is exported from the molten salt system at a high temperature for recycling. According to the method, the functional molten salt is used, instant purification of the gas with the hydrogen sulfide and the carbonyl sulfide at a medium-high temperature is promoted, long-term stable operation of the molten salt system is guaranteed, and resource recycling of sulfur is achieved.

The invention provides a file data edge caching method in a cross-domain virtual data space, and provides an edge caching mechanism for the file data in allusion to the requirement of efficient accessof remote data in the cross-domain virtual data space and the IO bottleneck problem brought to an upper-layer application by a wide-area environment. The method comprises the following steps: cachingremote data in a place close to a client, establishing an edge cache to improve the overall performance of accessing the remote data by an upper application, and further reducing data redundancy through cache sharing; the edge cache establishes a memory-based file cache for the small file, and establishes a sparse file-based file system cache for the large file; the consistency of data in the virtual data space is improved by adopting a caching strategy of a central read-write mark based on file extension attributes; and through a cache replacement strategy based on the file popularity, the cache performance and efficiency are ensured.

The invention relates to the technical field of hydraulic control, and discloses a low-energy-consumption high-dynamic pump valve combined position servo system and a control method thereof. The system comprises an asymmetric hydraulic cylinder, a bidirectional pump, a pump control subsystem and a valve control subsystem, wherein the asymmetric hydraulic cylinder is used for driving a load, the bidirectional pump is used for directly driving the asymmetric hydraulic cylinder, two oil outlets of the bidirectional pump are connected with a rod cavity and a rodless cavity of the asymmetric hydraulic cylinder respectively, the pump control subsystem is used for realizing controlling of the speed and displacement of a piston rod of the asymmetric hydraulic cylinder, and the valve control subsystem is used for realizing controlling of the output displacement of the piston rod of the asymmetric hydraulic cylinder. According to the system and the method, by means of asymmetric flow compensation, the problem of asymmetric dynamic flow of the asymmetric hydraulic cylinder is well solved, high-frequency response and high-precision motion tracking tasks can be realized through double closed-loop control of the pump control subsystem and the valve control subsystem, most of the flow required by load movement is provided by a pump control mode, and the dynamic response of the system is considered while the energy utilization efficiency of the hydraulic system is ensured.

The invention relates to realization method and system for transmitting Ethernet affair in RPR net. When receives Ethernet affair waiting for transmission, RPR net transmits affair based on MPLS protocol. This invention realizes to transmit private line Ethernet affair still in RPR net, which ensures well security of private line affair during transmission, and exhibits the advantage of safety and credibility in private line; meantime, as soon as determination for transmission route and bandwidth of Ethernet affair in RPR net, also ensures utilization efficiency of network bandwidth of transmission network.

The invention relates to the technical field of chemical pharmacy, and in particular relates to a preparation method of metformin hydrochloride, the method comprises the following steps: preparing crude metformin hydrochloride by adopting a solvent method; adding absolute ethyl alcohol I into the crude metformin hydrochloride, heating to reflux, dripping water under reflux, dripping absolute ethylalcohol II after the system is dissolved, cooling after the dripping is finished to obtain metformin hydrochloride crystals, and obtaining a metformin hydrochloride refined product through suction filtration, washing and drying. The metformin hydrochloride obtained by the preparation method is a white powdery solid, the purity is more than or equal to 99.99%, the key impurity dicyandiamide can becompletely removed, the quality requirement of the refined metformin hydrochloride can be met, the comprehensive yield is high, the mother liquor treatment is simple, and no pollution is caused to the environment.

The invention discloses a synergistic treatment device for degradation-resistant organic waste water and a method thereof, and belongs to the field of waste water treatment. The synergistic treatment device comprises a primary microwave waste water treatment unit and a secondary ultrasonic wave and electrocatalytic oxidation synergistic waste water treatment unit. In the microwave waste water treatment unit, primary waste water treatment is realized through physical and chemical reactions between microwaves and pollutants, the waste water obtained after microwave treatment enters the ultrasonic wave and electrocatalytic oxidation synergistic waste water treatment unit, on the premise that the waste water quality is improved by microwaves and conditions suitable for secondary treatment are created, secondary treatment on the waste water pollutants is achieved by means of strong-oxidizing free radicals synergistically generated by ultrasonic waves and electrocatalytic oxidation, and continuity of secondary treatment and high efficiency of electric energy utilization are ensured through an electrode surface layer clearing function of the ultrasonic waves. Secondary pollution is avoided in the whole waste water treatment process.

The invention discloses a high-temperature solid particle heat exchange system. Gas is taken as an intermediate heat exchange medium between high-temperature particles and a power cycle working medium, and the intermediate heat exchange medium is used for heat exchange between the high-temperature particles and the power cycle working medium, so that the technical problems of low heat exchange efficiency, serious abrasion of a heat exchange surface and the like of a particle heat exchanger are effectively solved. According to the high-temperature solid particle heat exchange system, leaked particles in the particle lifting process are recycled through pneumatic conveying, a solution is provided for heat recycling of the conveyed gas, low-temperature particles leaked in a particle lifting system or other conveying systems are conveyed into a low-temperature particle storage tank through a pneumatic conveying device, the low-temperature particle storage tank is a positive-pressure storage tank, and after the conveyed gas of the pneumatic conveying device is continuously input, positive pressure is formed in the tank, heat exchange gas in the particle / gas heat exchanger is effectivelyprevented from flowing back into the low-temperature particle storage tank, the pressure of the low-temperature particle storage tank is balanced through a check valve, the conveyed gas is guided into the particle / gas heat exchanger, waste heat of the low-temperature particle storage tank is recycled, and the particle heat loss is effectively reduced.

The invention provides an energy-saving distillation device of multifunctional lubricating oil production equipment. The device comprises a distillation tank, a tank cover, a stirring motor, an auger,a control panel, a heater, support legs, a fixed base, a lubricating oil guide pipe, an oil discharge pipe with a valve, a temperature sensor and an air guide pipe, and the upper end of the distillation tank is in threaded connection with the tank cover. A waste heat heating water storage tank, a hollow hanging seat, a water injection cover, a drain valve, a circulating pump and a waste heat waste-free reutilization heating circulating pipe are arranged, thus facilitating resource saving, and avoiding waste of thermal energy resources; when the heater is used for heating the distillation tank, heat is dissipated and the waste heat waste-free reutilization heating circulating pipe can be heated; at this time, water in the waste heat heating water storage tank is continuously sucked out through the circulating pump, circulating heating is continuously conducted through the waste heat waste-free reutilization heating circulating pipe, heat recycling work can be conducted, resource wasteis avoided, energy is saved, environmental friendliness is achieved, and no pollution is caused.

The invention discloses a photovoltaic power generation system based on MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor) counter-current prevention. The system comprises a storage battery, a control module, at least one photovoltaic cell panel, at least one voltage detection module and at least one MOSFET, wherein only one MOSFET is connected between each photovoltaic cell panel and the storage battery, each voltage detection module is respectively connected with the negative pole of each photovoltaic cell panel, each voltage detection module is also respectively connected with the control module, and the control module is connected with the grid electrodes of the MOSFETs and the voltage detection module. According to the invention, traditional counter-current diodes are replaced with the MOSFETs, because the internal resistance of the MOSFETs in the process of being turned on is small, and greatly lower than the internal resistance of a common diode, thereby greatly reducing the internal loss of energy in the photovoltaic power generation system, and improving the efficiency of the system.

The invention provides surface cerium-rich nanometer cerium-zirconium composite oxide as well as preparation and application thereof. The composite oxide is a composite of cerium-zirconium oxide and rare earth elements, wherein the molar ratio of cerium to zirconium to the rare earth elements is (2-4):3:(0.1-0.5). The cerium-zirconium composite oxide provided by the invention realizes the diversity of formulas in a same material. The cerium-zirconium composite oxide is prepared by a two-step process, and a structure rich in the cerium on the outer layer and rich in the zirconium on the inner layer is formed, so that the composite oxide not only has excellent ageing resistance, oxygen storage performance and reduction performance, but also has good catalytic performance.

The invention discloses a laser scanning annealing method adopting a hexagonal beam spot, belonging to the semiconductor manufacturing technology. The hexagonal beam spot is formed by four baffle mechanisms capable of moving independently, each two of baffle mechanisms are arranged in an opposite way in an optical path, and an upper baffle and a lower baffle move independently or synchronously; and a left baffle and a right baffle move independently or synchronously, the four baffles all adopt rectangular baffles, the opposite sides of the upper baffle and the lower baffle or the left baffle and the right baffle are respectively provided with a V-shaped opening to form vertex angles A of a hexagon, and the vertexes of the vertex angles A are arranged on a central line. During wafer scanning annealing through the hexagonal beam spot, two adjacent scanning lines are overlapped for compensation, the problems of excessive or insufficient scanning between lines in the traditional line-by-line scanning can be solved, and the difficulty in implementation and the cost of implementation of the whole system cannot be increased.

The invention relates to the field of cooking range infrastructures, in particular to an energy-saving cooking range. The energy-saving cooking range comprises a hearth, and more than three flame guide ribs circumferentially and uniformly distributed along an internal wall of the hearth, wherein the hearth is in a cylindrical or bowl-shaped structure; a gas distributing disk and an ignition part matched with the gas distributing disk for ignition are arranged at the bottom of the hearth; the energy-saving cooking range is provided with air inlets used for allowing air to enter in the hearth and / or in a position where the gas distributing disk is matched with the hearth; the flame guide ribs extend from the bottom of the hearth to the top of the hearth sequentially; and arrangement directions of the flame guide ribs are different from a generatrix direction of the hearth. According to the energy-saving cooking range, a flow-through route of a flame can be changed by an artificially designed flame path, so that a purpose of prolonging the attachment time of the flame on the internal wall of the hearth can be achieved; an effect of improving heat exchange is further exerted; the energy-saving cooking range is simple in structure and convenient to realize; and the low manufacturing cost and the low use cost of the energy-saving cooking range can be ensured effectively.

The invention discloses a waste wood treatment device for solid wood furniture processing. According to the waste wood treatment device, waste and wood chips can be automatically treated and can be automatically pressed into a board, waste wood is crushed by a crushing mechanism and then is classified and filtered by a classifying and filtering mechanism, so that the utilization efficiency of the wood chips and the waste wood is effectively guaranteed, a laying mechanism is used for laying all layers of wood chips conveyed by a conveying mechanism, a glue spraying mechanism is used for spraying a bonding glue solution to all layers of laid wood chips, so that the mixing performance of the glue solution and all layers of wood chips is effectively guaranteed, the bonding and fixing performance of the wood chips is guaranteed, the compression molding effect is improved, the particle size of the wood chips in the center of the compression-molded wood chip board is the largest, in addition, the particle size of the wood chips on the outermost side is the smallest, the strength of the compression-molded board is effectively guaranteed, the particle sizes of the wood chips are arranged according to the size mode, the cohesiveness of the wood chips with smaller particle sizes is guaranteed, the wood chips with larger particle sizes are located in the center, the supporting capacity of the center of the board is improved, and the quality of the laminated board is improved.

The invention discloses an additive capable of effectively restraining Zhundong coal slagging and fouling and an application method thereof. The additive is prepared from the following components in percentage by mass: 45 to 75 percent of kaolin, 10 to 25 percent of quartz sand, 10 to 20 percent of magnesite, and 0 to 10 percent of zeolite. The method for applying the additive to Zhundong coal combustion comprises the following specific steps: uniformly mixing the additive and Zhundong coal in advance; then performing combustion. The additive has the advantages of relatively simple components, adoption of readily-available natural minerals, low cost, simple preparation process, and no side effect on the running and environment of boiler equipment, and is safe and reliable.

The present disclosure provides a network management side device and method, a user equipment side device and method, and a central management device and method employed in a wireless communication system. The network management side device employed in the wireless communication system comprises: an acquisition unit configured to acquire distribution-related user features of specific user equipment in a region covered by the wireless communication system; and a determination unit configured to determine the allocation of resources in a wireless transmission resource pool to be used by the specific user equipment according to the user features acquired by the acquisition unit.

The invention relates to a water-based shower coating white primer which is composed of the following components by weight: 30%-45% of aqueous acrylic emulsion; 30%-45% of aqueous polyurethane emulsion; 0.5%-2% of a defoaming agent; 0.5%-3% of a thickening agent; 5%-13% of titanium dioxide and 5%-15% of water. The defoaming agent is a mineral oil type defoaming agent, and the thickening agent is a polyurethane acrylate thickener. The water-based shower coating white primer can replace traditional solvent type white paint for printing and shower coating onto floorings, furnitures, decoration plates and other plates. The water-based shower coating white primer has good adhesion to wood, because of the use of shower coating technology, a large amount of the white primer is coated once, a very good hiding power is provided, the plate production cost is reduced, the water-based shower coating white primer has the advantages of being environmentally friendly and the like, and requirements on conditions of production are not high.

The invention discloses a self-pressing type secondary fluid supplementary mask preparation method, and belongs to the technical field of mask preparation. According to the self-pressing type secondary fluid supplementary mask preparation method, due to the arrangement of embedding fluid supplementary balls into the upper edge of mask paper in the preparation process, when secondary fluid supplementation is needed after a period of time in the use process, the fluid supplementary balls can be extruded; on one hand, a liquid separation film is opened by inert gas; the strength of the liquid separation film is weakened; on the other hand, essence generates extrusion force on the liquid separation film; under the dual action, the fluid supplementary balls are broken; the essence in the fluidsupplementary balls overflows and is continuously dispersed downwards to a face; and the essence effect of secondary fluid supplementation is achieved. Compared with the prior art, the complex operation of manually dripping and supplementing the essence to the face is effectively avoided; waste caused by dripping of the essence is effectively reduced; and thus, the use efficiency of the essence onthe mask is effectively guaranteed.

The invention discloses a low-temperature reduction type cobalt (Co)-based Fischer-Tropsch synthesis catalyst and a preparation method thereof. The catalyst takes ZnO as a carrier and Co as an active ingredient; and the catalyst comprises 3-15wt% of Co and 85-97wt% of ZnO. The preparation method of the catalyst comprises the following steps of: carrying out coprecipitation reaction on a zinc nitrate aqueous solution and an ammonium carbonate aqueous solution to obtain ZnO, then loading Co on ZnO by an immersion method, drying at 120 DEG C, and then roasting at 500 DEG C to obtain the Co / ZnO Fischer-Tropsch synthesis catalyst. The catalyst and the preparation method have the following beneficial effects: by introducing Co by the immersion method, the content of Co can be accurately controlled, and the preparation method is easy to repeat and amplify; and the catalyst is suitable for reduction at low temperature, thus preventing Co from aggregation in the reduction process, being favorable for forming metallic Co with a small size, and ensuring the utilization ratio of Co in the reaction.

The invention relates to nesting bi-characteristics fast problem locating and information self filtering general systematic method. It diagnoses and locates various abnormal problems in system running by systematic building one set of context environment description behavior and information self synthesizing mechanism which can greatly save locating problem required time and various resources demand, is convenient for various personnel to adopt proper matching measure to treat the problem. The invention uses multilayer characteristic sign, nesting type synthesizing mechanism, and general assemble output service mechanism to finish no recurrence fast locating problem and system diagnosis.

The invention discloses a vertical wind-powered aeration oxygen-charging machine. The vertical wind-powered aeration oxygen-charging machine comprises a wind wheel supported above an aeration tank by a support, the wind wheel is connected to a steering gear by a transmission shaft arranged in the support, the steering gear is connected to a speed increaser, the speed increaser is connected to a blower by a buffer and an elastic coupling, the blower is connected to an exhaust pipe and the tail end of the exhaust pipe is communicated with the interior of the aeration tank. The vertical wind-powered aeration oxygen-charging machine realizes combination of speed increasing, air blasting and aeration and solves the problem that the existing rural sewage treatment technology needs electric supply so that an operation cost is high and water reoxygenation capability is insufficient. Wind provides power for oxygen-charging of water so that an investment is saved, a structure is simple and a sewage factory operation cost is reduced. Conversion efficiency of wind power to mechanical energy is high, a service life is long, reoxygenation efficiency is high and aeration oxygen-charging requirements on a deepwater layer are satisfied.

The invention discloses a system and a method for automatically controlling the moisture content of fabric. The system for automatically controlling the moisture content of the fabric comprises a first drying cylinder group, a second drying cylinder group and a control host computer, wherein a first inlet and a first outlet are formed in the first drying cylinder group; a second inlet and a second outlet are formed in the second drying cylinder group; the first outlet corresponds to the second inlet; the first drying cylinder group is also provided with a first steam regulating device and a temperature sensor; the first steam regulating device is used for regulating the temperature of the first drying cylinder group; the temperature sensor is used for detecting the temperature of the first drying cylinder group; the second drying cylinder group is also provided with a second steam regulating device and a fabric moisture content detector; the second steam regulating device is used for regulating the temperature of the second drying cylinder group; the control host computer is electrically connected with the first steam regulating device, the temperature sensor, the second regulating device and the fabric moisture content detector. According to the system and the method for automatically controlling the moisture content of the fabric, disclosed by the invention, the product quality can be effectively ensured, the production efficiency is increased, and the production cost is reduced.

The invention provides an identification method, a device and a cabinet of node servers. The identification method which is applied to the identification device integrated on the cabinet comprises the steps of sending node information identification instructions to all node servers inserted into the cabinet; judging whether confirmation messages replied by all of the node servers are received, and if so, determining the node servers which reply with the confirmation messages as effective servers. By adopting the embodiment, whether the node servers are effective does not need to be manually distinguished by technical personnel, so that the manual workload is reduced, the effective node servers can be automatically identified, and the identification method is especially suitable for the scene that a plurality of SmartRack cabinets need to be managed synchronously; additionally, even different types of node servers, for example, markers of the node servers of different manufacturers are not obvious, therefore, the node servers do not need to be accurately distinguished by troubleshooting hardware information, the manual troubleshooting difficulty is reduced, and a large quantity of financial resources are saved.

The invention relates to a method for generating electricity through extracting extremely low concentration gas from a biogas development coal mine, belongs to the fields of energy development and pollutant emission reduction, and concretely relates to a method for generating electricity through collecting organic wastes surrounding the coal mine, producing biogas from the organic wastes and extracting the extremely low concentration gas (having a CH4 content of 5% or below) The environmental problem caused by direct emission of the extremely low concentration gas due to no effective utilization is mainly solved; and the generated electricity can be used in the coal mine factory, and generated heat can be used for the warming and long-term heating of a biogas fermentation tank, so the economic benefits of biogas development are increased. The method solves the problems of low utilization rate of the extremely low concentration gas, environmental pollution and poor safety of the miningarea, and a system for generating electricity through extracting extremely low concentration gas from the biogas development coal mine has the advantages of simplicity in operation and maintenance, high reliability, obvious energy generation benefit and strong innovation.