360results about How to "Improve gas production efficiency" patented technology

The invention provides a natural gas hydrate water discharge gas production exploitation device and an exploitation method of the natural gas hydrate water discharge gas production exploitation device, and belongs to the technical field of natural gas hydrate exploitation. A feeding cavity (12) communicated with a natural gas hydrate layer (29) is connected with an in-well gas-liquid separator (7), an exhaust cavity (8) of the in-well gas-liquid separator (7) is communicated with a gas production sleeve pipe (17), and a water discharge opening of the in-well gas-liquid separator (7) is communicated with a liquid storage cavity (2) arranged at the lower part. According to the exploitation method adopting the device, the natural gas hydrate layer (29) is firstly heated, the in-well gas-liquid separator (7) is utilized for separating gas-water mixture generated in the natural gas hydrate decomposition process, meanwhile, a liquid level monitoring device is utilized for regulating the water discharge speed of an electric submersible pump (4), and the decomposition speed of the natural gas hydrate is controlled. The device and the method have the advantages that the natural gas hydrate exploitation well liquid accumulation can be effectively prevented, the gas production efficiency is improved, the work is safe and reliable, the environment is protected, the service life is long, and the like.

The invention discloses a secondary anaerobic fermentation and power generation system for large-middle scale biogas engineering, which belongs to a biogas production device. The invention aims to provide a biogas production system which can be used for centralized power generation. The system comprises a pretreatment tank, a primary fermentation tank, a secondary fermentation tank and a biogas residue tank; the pretreatment tank (16) is communicated with a USR reactor (14) through a feeding pipe (15), the USR reactor is communicated with the secondary fermentation tank (10) through an overflow pipe (21) and a gas conduit (2), and the USR reactor (14) and the secondary fermentation tank (10) are communicated with the biogas residue tank (11) through a residue discharge pipe (12) respectively; and the secondary fermentation tank supplies biogas for a generator through a biogas purification device (3). The system realizes the conversion of biogas fermentation from a small-scale production mode to a centralized high-efficiency large-scale mode, and has the advantages of low cost, high efficiency of wastewater treatment, high gas yield and the like; and the system can be matched with large-scale livestock and poultry farms for construction, thereby achieving the aims of saving energy sources, reducing the emission, and protecting the agricultural ecological balance.

The invention relates to a decompression marine natural gas hydrate mining method and a submarine mining system. The submarine mining system comprises a semi-submersible offshore platform, a mining well with multiple shower holes, a wellhead gas and water acquisition tree, a gas and water mixed delivery system, a submarine gas and water separating device, a gas delivery system, a pipeline system, a power and communication system and an auxiliary device. The decompression marine natural gas hydrate mining method and the submarine mining system have the advantages that submarine natural gas hydrate reservoirs can be safely, efficiently and economically mined; the submarine mining system is complete, and various portions of the submarine mining system are high in modularization, low in manufacturing cost and short in manufacturing cycle and can be reused; most devices are positioned in submarine environments and are controlled via the offshore platform, only natural gas is delivered offshore, and accordingly the submarine mining system is low in extra energy consumption; owing to a technology for forming the multiple shower holes in the mining well, missed mining regions can be effectively reduced, and the gas yield can be effectively increased owing to multiple horizontal wells; the submarine mining system has functions of well blocking prevention, well blowout prevention, hydrate secondary generation and the like, and accordingly safety production can be guaranteed; various main devices can flexibly move and are used with one another, and accordingly movable regional production operation can be implemented.

The present invention relates to a “drilling-flushing-slotting” coupled pressure relief and permeability increasing method for a high gas outburst coal seam, which is more particularly suitable for the pressure relief and permeability increasing when gas of a roadway band of the high gas outburst coal seam is pre-extracted through crossing boreholes. On the basis of the crossing borehole pre-extraction measures for the coal seam gas, the hydraulic flushing and the hydraulic slotting are reasonably combined, and a “drilling-flushing-slotting” dedicated device is utilized to implement the coupled operation of “low pressure drilling-medium pressure flushing-high pressure slotting” in a borehole, so that the coal in the pre-extraction area is deformed and moved to form network cracks, passages are provided to the desorption flow of the gas, and the gas is easier to extract. The method can enlarge the single-hole pressure relief influence range, increase the gas permeability of the coal seam, improve the gas extraction efficiency, reduce the number of pre-extraction boreholes, shorten the pre-extraction time and have good applicability to the coal seams in different occurrence states. The present invention can reduce the number of the crossing boreholes by 32.5% and can reduce the length of each crossing borehole by 42.9%, is remarkable in coal roadway regional outburst eliminating effect, and obviously increases the tunneling speed.

Natural gas produced from a well by executing a multiple-phase gas recovery cycle which includes a phase during which a relatively lower evacuation pressure is applied within three chambers in the well to assist in accumulating liquids at a well bottom, followed by a liquid reduction phase which clears the liquid from two of the chambers while leaving the liquid in the third chamber. The remaining liquid is thereafter lifted in subsequent liquid capture and liquid removal phases. The liquid reduction phase clears the fluid from the well more effectively with less interruption in the production of gas from the well while maintaining the full gas productivity of the well.

The invention relates to a method and device for recycling edible mushroom residues. The method mainly comprises the steps of placing waste mushroom residues and maize straws or excrements from a cattle farm into an anaerobic reactor for united fermentation to produce biogas, and covering a red-mud plastic head cover on the anaerobic reactor, wherein an inclined stirrer is arranged and is beneficial to feeding/discharging of mushroom residue raw materials and avoidance of crusting. The produced biogas is used for power generation and agriculture, biogas residues are used for manufacturing organic fertilizers, biogas slurry is prepared into foliar fertilizer for fruits or vegetables, and thus, new energy sources, namely the biogas and the organic fertilizers, are obtained while the mushroom residues are treated. The method and the device in the invention are mainly used in major edible mushroom producing areas, a solar-panel greenhouse and a solar heat supply device are assorted for the device, a composite microbial inoculum is assorted for the method, and the anaerobic reactor can be normally used all the year round.

The invention discloses a spiral self-stirring dry fermentation device and a method. Fermentation cylinders are obliquely arranged at the bottom in a gas storage tank which is installed on a top board of a leachate holding tank; an enclosed inner cylinder is arranged at the central part in each fermentation cylinder along an axial direction; a leachate jet pipe is mounted in the inner cylinder; nozzles are distributed on the leachate jet pipe and extend out from the inner cylinder; spiral separator plates are distributed in each fermentation cylinder along an axial direction, and initiating terminals of the spiral separator plates are located behind a feed inlet; a lower end of each fermentation cylinder is provided with a material outlet, a slag removal opening communicating with the material outlet of the fermentation cylinder is mounted on a base plate of the gas storage tank, and a slag removal door is arranged on the slag removal opening; the leachate holding tank is provided with a leachate return pipe communicating with the gas storage tank and a pipeline communicating with a leachate inlet of the leachate jet pipe; electric heating pipelines are distributed in the leachate holding tank; and a biogas conveying pipeline communicating with the upper part of the gas storage tank is arranged at the upper part of the leachate holding tank. The invention also provides the method of using the device for fermentation.

A process and apparatus for preparing a synthesis gas suitable for feeding to a suitable hydrocarbon production reactor, such as a Fischer Tropsch reactor is described. According to one aspect, the process and apparatus utilize heat exchangers that thermally integrate the reaction steps such that heat generated by exothermic reactions, e.g., combustion, are arranged closely to the heat sinks, e.g., cool methane, water and air, to minimize heat loss and maximize heat recovery. Effectively, this thermal integration eliminates excess piping throughout, reduces initial capital and operating costs, provides built-in passive temperature control, and improves synthesis gas production efficiencies.

The invention discloses a hydrate sediment flow solid output measuring device combining an X-CT technology and a measuring method. The measuring device comprises an X-ray penetration type reaction kettle, an X-CT scanning analysis system, a vacuum system, a temperature and pressure control system, a hydrate sample preparation system, a sand production monitoring system and a permeability measuringsystem, wherein through integrated application of a sand production-seepage system under the micro-scale multi-factor coupling effect, the coupling relationship of a reservoir structure and physicalspace-time evolution and flow solid output under the multi-factor collaborative action can be quantitatively described, different hydrate generation modes can be selected according to the experiment requirements, different hydrate occurrence states in natural sediments can be simulated and studied, and the device and the method can be used for researching the space-time evolution characteristics of a sediment pore structure under the hydrate convergence and divergence and effective stress conditions and an influence rule of the space-time evolution characteristics on sediment flow solid output, so that the theoretical bottleneck of the hydrate reservoir structure and a physical evolution and flow solid output mechanism in a hydrate production process is broken through, and the device and the method have important engineering significance to deeply understand a depressurizing production law of the South China Sea, practically improve the biogas production efficiency and perfect a depressurizing production technology system.

The invention discloses a method for producing marsh gas by utilizing corn cob fungi slag as a raw material through anaerobic fermentation. The method comprises the following steps: mixing the fungi slag wasted after corn cob is used as a main raw material to cultivate edible fungus with pig manure or cow dung, adding a methane reagent, and carrying out pile fermentation; and putting fermentationraw materials in a household methane-generating pit or an anaerobic reactor, wherein the addition amount of the raw materials is 80-130 kg per cubic meter of pit volume. In the invention, generation of methane via anerobic fermentation is achieved by carrying out reasonable proportioning, pretreatment, pile outside the pit, fermentation starting and the like on the fermentation raw materials, thereby effectively solving the problem that the pollution is caused by discarding the fungi slag at random and simultaneously turning waste into wealth. After the method is utilized, the gas can be normally generated by the fungi slag in the household, and the method is simple with no need of special equipment and can be applied and disseminated in edible fungus cultivating households.

The invention relates to a gasified gas purification device, in particular to a double-flow biomass gasified gas purification device, which solves the problems of low reaction temperature of a gasification furnace, abundant generated tar and wastewater, low gas-producing efficiency and abundant impurities and low heat value of output gas, resulted from unscientific structure of the gasification furnace. The gasified gas purification device comprises a gasification furnace, a gas flow control valve, a vortex flow oxidation-assisted control valve, a gas purifier and a fan. The gasified gas purification device provided by the invention has the advantages of increasing the reaction temperature of the furnace, wherein the temperature in oxidation, reduction and pyrolysis cylinders is between 1,300 and 1,600 DEG; increasing the gasification intensity; being capable of quickly separating moisture in biomass combustible gas so that gas quality is better; ensuring greatly reduced tar content in the combustible gas, less wastewater generated, high gas-producing efficiency and low environmental pollution due to the adoption of a mesh-type catalytic cracking device; and removing tar, moisture and ash in the gas through the gas purifier so that the heat value of the gas is improved. The gasified gas purification device is widely applied in industrial and civil fields.

The invention relates to a methane-producing composite microbial inoculum and a preparation method thereof, which can solve the long-standing difficult problems that the existing biogas digester is lack of high-efficient methane-producing bacteria, thereby resulting in long initial start-up time of biogas production and poor stability of the biogas production. Methanosarcina acetoacidophilum DSM-N0.2834, methanobacterium formicicum DSM-No.1535, methanobrevibacter arboriphilicus DSM-No.1125, methanolobus tindarius DSM-No.2278 and methanothrix concilii DSM-No.6752 collected in German collection of microorganisms and cell cultures are adopted and inoculated in a liquid methane bacterial culture medium under the anaerobic condition, the independent enlarged culture is carried out grade by grade respectively, and bacterial liquid after the cultured methane bacteria is mixed together according to the volume ratio, thereby preparing a liquid methane-producing composite microbial inoculum; and the liquid methane-producing composite microbial inoculum can also be prepared into a solid methane-producing composite microbial inoculum. The method has reasonable design and adopts the high-efficient strains with the optimal combination and the rapid propagation technology, and the developed high-efficient methane-producing composite microbial inoculum can significantly accelerate the start-up time of the biogas production when in new construction of the biogas digester and large material change, and improve the efficiency and the stability of the biogas production of the biogas digester.

The invention relates to a method for enhancing heavy metal stabilization process in the urban sludge anaerobic digestion process. Municipal sludge serves as raw materials, a special vacuum reacting furnace is adopted, sludge biochar is prepared high-temperature pyrolysis under the anoxic condition, SBC is modified through glass fiber wetting, and finally the sludge biochar of a stable structure, with high voidage and resistant to acid and alkali impact is obtained; in the sludge anaerobic digestion acid production stage, the sludge is added to a reactor according to a proper proportion, free state heavy metal in the reactor can be absorbed and captured obviously, and finally the stabilizing process of the sludge heavy metal is accelerated and enhanced. The method basically cannot generate adverse influences on a sludge anaerobic digestion reaction system, the generated biogas residue is obviously lowered in the water content, and the dewaterability is obviously improved. The method can be used for remaining sludge anaerobic digestion engineering of sewage treatment plants in cities and towns, the heavy metal stabilization process in the anaerobic digestion process is effectively enhanced, the sludge stabilization process is accelerated, and the method has great significance for lowering the risk of heavy metal environmental pollution and improving the soil health quality in the utilization process of sludge lands generated after anaerobic digestion is conducted.

The invention discloses a construction process of a multi-branch underground screen pipe, which comprises the following steps of: 1, preparing; 2, drilling in advance; and 3, drilling and laying the screen pipe: drilling a first section of horizontal main shaft hole and a first section of branch well hole and laying the screen pipe, drilling the next section of horizontal main shaft hole and the next section of branch well hole and laying the screen pipe, repeating the operation until completing the drilling of a plurality of branch well holes and the laying the screen pipe, the drilling of the last section of horizontal main well hole and the laying of the screen pipe of the horizontal main well holes. The invention has the advantages of reasonable design, high construction efficiency, low investment input and good use effect, is convenient for operation, can effectively increase the yield of a multi-branch horizontal well, and effectively solves the defects of high investment cost, larger construction risk, complex construction step and difficult realization of the steps, low yield of the multi-branch horizontal well subjected to the construction, and the like in the traditional construction process of the multi-branch horizontal well.

The invention discloses a coal bed methane recovery method. A multi-branch U-shaped well is used in cooperation with a coal bed methane heating injection shaft for recovering coal bed methane. By the adoption of the coal bed methane recovery method, the recovery efficiency can be improved, cost is reduced, safety and high efficiency are achieved, and operation is easy.

The invention relates to a preparation method for a microbial organic soil bactericidal and insecticidal warming conditioning agent. Fermentation raw materials are domestic fungus cultivation residue substances, the fermentation raw materials are crushed and added with water, and thus the water content mass percent of the fermentation raw materials is 25-35%; decomposing inoculants are added at a mass ratio of1:1000, the mixture is mixed uniformly, the fermentation raw materials mixed with strains are added with tourmaline powder with a mass percent of 5%, rare earth negative ion powder with a mass percent of 2%, composite biological insecticides accounting for 1% of the finished product total mass and composite biological bactericides accounting for 1% of the finished product total mass, the mixture is mixed uniformly, then loose packing or granulation is carried out, drying is carried out and the water content is 10%; packaging is carried out, and a microbial organic soil bactericidal and insecticidal warming conditioning agent is prepared. The produced conditioning agent is advantageous in that the organic matter content is high, the ground temperature is raised, absorption of phosphor and potassium for crops can be raised, the conditioning agent has functions of preventing soil borne diseases, releasing phosphorus and potassium, fixing nitrogen and killing nematodes and green environmental protection is achieved.

The invention relates to a pretreatment fungicide for xylose residue or furfural residue, a preparation method and an application thereof, belonging to the technical field of agricultural microbiology. The invention relates to a microbial composite fungicide specially used for promoting the xylose residue or the furfural residue to degrade and improving the production efficiency of methane. The invention firstly adopts liquid fermentation technology to purely breed and ferment all components of the microbial fungicide, and then the components are compounded. The preparation method of the pretreatment fungicide comprises: 0.20-0.40 parts by weight of trichoderma viride liquid, 0.10-0.15 parts by weight of phanerochaete chrysosporium liquid, 0.05-0.10 parts by weight of aspergillus niger liquid, 0.08-0.16 parts by weight of aspergillus oryzae liquid and 0.05-0.10 parts by weight of trametes versicolor liquid, and the dry weight of fermentation hyphae is more than 20g/L. The composite fungicide can be used for improving the composite fungicide speed of the xylose residue or the furfural residue as well as the methane production efficiency; the methane production efficiency is improved by 30-60%; the fermentation time is shortened; the start period is shortened by 3-10 days; and the invention is also good in the effects on the aspects of pretreatment of smashed straws, and methane production.

The invention provides a gas generating agent and a preparing method of the gas generating agent. The gas generating agent is of an A/B core shell structure. A core A comprises a first combustible agent and a first oxidizing agent, and a shell B comprises a second combustible agent and a second oxidizing agent. The combustion speed of the second combustible agent is lower than that of the first combustible agent, and the gas generating agent not only is adjustable in combustion speed and suitable for gas generators of various gas bags, but also is high in gas generation efficiency, long in service life and little in residue. Meanwhile, a coating structure can enable the gas generator to be longer in acting time and also has a very good moisture proof effect, so that service life of the gas generating agent is greatly prolonged, and using performance is very good. The gas generating agent is simple in technology, easy to prepare, free of harm and pollution and easy to produce in a large-scale mode.

The invention discloses a compressed air control system and a compressed air control method based on an air demand. The compressed air control system comprises one or more air compressors, a system controller, a front end pressure sensor, a compressed air outlet pressure sensor, a flowmeter and a proportioning valve. The air compressors are provided with external communication interfaces or external digital quantity input-output interfaces for feedback and control of data communication or dry contact state of the controller. From the aspect of demand of an air terminal, the air supply pressureof a compressed air general pipe is controlled dynamically through the proportioning valve as the lowest guarantee pressure needed by the air terminal, and the operating quantity of the air compressors is controlled according to the actual flow of the compressed air, so that air consumption and generation of the compressed air system are balanced dynamically, and therefore, the operating efficiency of the compressed air system is improved and the energy waste is reduced.