351 results about "Natural gas storage" patented technology

An electric-substituting natural gas combined system and process based on coal gasification and methanation are disclosed. The process is carried out by delivering oxygen, powdered coal or water-gas slurry into gasified apparatus, recovering for crude gasified gas by wet heat, delivering into sulfur-resisting carbon monoxide carbon reactor, adjusting hydrogen-carbon ratio, entering into desulfurizing decarbonizer, recovering elementary sulfur while enriching carbon dioxide, delivering synthetic gas into methane reactor to generate substituted natural gas as domestic gas partially, entering into gas and steam combined circulator partially, and entering into substituted natural gas storage tank partially. It integrates coal gasified, methanation and gas steam combined circulation together, it's efficient and clean, has better utilizing rate, no CO2 discharge and need for changing gas turbine or load.

The gas flow in water-containing natural gas wells and natural gas storage wells is improved if a homogeneous phase comprising a water-repellent, solvolysis-resistant active compound is injected into the water-bearing rock.

Systems and methods for optimizing the recondensation of boiloff gas in liquid natural gas storage tanks are presented. In especially preferred aspects of the inventive subject matter, BOG from a storage tank is condensed using refrigeration content of a portion of LNG sendout in a direct or indirect manner, and the BOG condensate and LNG sendout portion are combined to form a subcooled stream that is then combined with the balance of the LNG sendout, to be fed to a high pressure pump. Contemplated recondensation operations advantageously occur without using otherwise needed large volume recondensers. Moreover, the condensing and subcooling operations are decoupled from the LNG sendout rate.

The invention provides a determination method for risk of storage medium leakage of an underground natural gas storage reservoir. The method is used for determining the risk of storage medium leakage of the underground natural gas storage reservoir based on a fuzzy fault tree so as to judge the possibility of leakage failure of the underground natural gas storage reservoir. In the method, the fault tree for the storage medium leakage from a salt cavern underground natural gas storage reservoir to the outside atmospheric environment is established, the probability of basic event causing the storage medium leakage to the outside atmospheric environment is determined by a historical data statistical method and an established engineering evaluation model, influence of various risk factors on the probability of basic event is introduced into the calculation of the probability of basic event in the form of correction factors, and simultaneously, according to the principle of controlling the leakage mode by a main event, and the fault tree logic, the determination methods for the risk of small-leakage mode, big-leakage mode and cracking mode storage medium leakage of the salt cavern underground natural gas storage reservoirs are established.

The invention relates to a method for welding a large liquified natural gas storage tank. The method uses alternating rectangular wave current for welding with a welding parameter of between 8.156 and 24.32 KJ / cm and the interlayer temperature of energy input of between 18.9 and 24.32 KJ / cm of 300 DEG C, and selects low carbon type nickel-based welding wire. The method overcomes the problem of arc blow in welding, not only can avoid impact on 9 percent Ni steel during carbon gouging, but also can save welding materials and manpower so as to accelerate construction process and improve welding efficiency. Welding with the process can improve the cold temperature flexibility of a macrograin area of a welding zone, avoid generation of brittle tissue of a fusion area, avoid generation of cold and heat crack in welding, has excellent quality of weld joint, and effectively ensure the cold temperature flexibility of 9 percent Ni steel welding joints. The method well control the quality of the weld joint, and ensures the overall quality of the natural gas storage tank.

A system for storing natural gas comprises a plurality of straight sections of tube. The plurality of straight sections of tube are dense packed. The plurality of straight sections of tube are configured to fill a designated volume.

The invention provides a working system of an electrically controlled natural gas engine. A natural gas supply system comprises a natural gas storage tank, a switch electromagnetic valve and a pressure reducing valve which are connected in turn, and a natural gas introducing device introduces natural gas into a gas intake manifold; the natural gas introducing device is an electronic adjusting valve or an ejector and is controlled by an ECU; the ECU comprises a natural gas introducing control program, an ignition control program and an idle speed control program; in addition, a gas storage tank with function of stabilizing pressure is arranged between the pressure reducing valve and the ejector, so that the natural gas engine and an electronic control system thereof run more stably; the control of the natural gas introducing amount is achieved through the control of output pulse width; a self-absorption system has the advantages of stable performance and lower cost, and is comparatively suitable for refit of old gasoline engines and diesel engines; and a direct injection type system has the advantages of good performance, good acceleration performance and high efficiency, and can meet higher discharge normative requirement.

A system for storing natural gas comprises a plurality of straight sections of tube. The plurality of straight sections of tube are dense packed. The plurality of straight sections of tube are configured to fill a designated volume.

The present invention revolves around the incorporation and use of existing drilled wells, either dry holes, abandoned or converted producing wells and / or new, to be drilled wells or any other well(s), of any diameter and any depth, located, sited, designed and fabricated to store and cycle compressed natural gas or other gasses or hydrocarbon liquids within the contained cavity of the well-bore casing in any volume and with any degree (high or low) of deliverability.Each of the well(s) can then be incorporated with additional facilities, depending upon designed use and process (use and process as discussed within the patent application), such as standard telemetry, automation and integration equipment, compressors, pressure reducing regulators, turbo-compressors (for electrical and or mechanical power creation), distributed power generator engines, measurement equipment and other components for compressing and storing the gas or hydrocarbon liquids within the system at a range of rates, and then cycling the gas out of the well(s) for a number of business applications. The well(s) can also be incorporated with standard electronic communication devices to automate and integrate them within other systems such that they can be controlled remotely and automatically from any location.

The invention relates to a method for preparing a natural gas hydrate, and belongs to the field of natural gas storage and transportation. A device comprises a process transformation control unit, a multi-section bubble reactor, an intermediate storage tank, a water tank, a refrigeration unit, a cold storage unit, a separating machine and a center control system; the device is composed of three sections; the lower section is a reaction section formed by a line tube and an outer cylinder, the gas and water flow and react in the line tube, and cold quantity is provided at a shell side to form a cold trap in a reaction tube so as to remove reaction heat; the intermediate section is a reaction mixture retention area; the upper section is a gas cap used for regulating the pressure inside the reactor; the refrigeration unit is provided with four loops; one loop is communicated with the reactor, one loop is communicated with the intermediate storage tank, one loop is communicated with the water tank, and one loop is communicated with the cold storage unit; the reactor is provided with a crystal regulator which is sued for regulating the retention time of a hydrate with the process transformation control unit together. According to the method disclosed by the invention, the hydrate obtained after separation is granulated through liquid nitrogen refrigeration to obtain hydrate solid granules. The device disclosed by the invention integrates the functions of hydrate reaction and separation, hydrate shape and retention time regulation and the like.

The invention discloses a heat accumulating type tank for absorbing and storing natural gas. The heat accumulating type tank comprises a tank body (3); and the interior of the tank body (3) is provided with multi-layer natural gas adsorbent (8), multi-layer metal meshes (7), and multi-layer metal tubes (4), wherein, heat accumulating material is arranged in the metal tubes (4). The heat accumulating material in the invention can adjust the temperature in the storage tank during the adsorption and desorption of the natural gas, so as to reduce heating effect and improve storage and transportation efficiency, thus not only solving the problem of recovering scattered natural gas in remote areas, but also being applied to large-scale natural gas storage and transportation and natural gas refueling stations.

A fuel tank mounting system for movable machine is disclosed. The mounting system may include a fuel tank connected to a frame of the movable machine in such a manner as to allow vertical motion of the tank relative to the frame. The fuel tank may be mounted to the frame using a spring and / or a shock absorber. The fuel tank may be a cryogenic fuel tank for storage of liquid natural gas. The shock absorbers may be tunable so that the level of dampening provided by the shock absorber is tailored to the type of machine and the specific mode of operation of the machine.

The invention relates to an energy-saving refrigeration transport cart. The transport cart comprises a fuel gas system, a refrigerating system, a control system and an air feeding and returning system, wherein the fuel gas system is composed of a natural gas storage tank, a pressure reducer, an air mixer and an engine, the refrigerating system is composed of a plate-type heat exchanger, a condenser, a liquid pump, a drying filter, a throttling valve, an air cooler, an air conditioner, an electromagnetic valve and an electric valve in a connected mode, the control system is composed of a controller and a temperature sensor, the air feeding and returning system is composed of an uneven hole plate, an air feeding duct, an air returning baffle and an air returning duct, and a solar storage cell panel is connected with the controller through a control switch. Economical and safe natural gas low in pollution is adopted for the transport cart to be used as fuel, waste heat of exhaust gas is utilized to heat refrigerant when power is provided for the cart, and cooling capacity is provided for a refrigerating compartment and a cab; the solar storage cell panel is utilized to supply power to heat an electric heating wire to defrost the air cooler; airflow organization and a temperature field in the compartment can be controlled evenly, and the purposes of saving energy and protecting the environment are achieved.

A home based fast-fill natural gas refueling station for providing natural gas fuel to a vehicle. A compressor is attached to the natural gas fill line. The compressor functions to pressurize a natural gas storage tank array. The storage tank array includes a plurality of natural gas storage tanks. A pressurized natural gas storage tank exit line is connected to a frontmost storage tank and a fill nozzle is connected to the storage tank exit line. During the refueling process the compressor is turned off. Also, during the refueling process as the pressure is depleted in the frontmost storage tank the frontmost storage tank is simultaneously and rapidly repressurized by other storage tanks in the storage tank array allowing for fast refueling of the vehicle.

The invention belongs to the technical field of hydrate fundamental researches and relates to a natural gas hydrate occurrence type simulated exploitation experimental system. The system comprises a reaction still, a gas-liquid collection system and a data collection system. Natural gas hydrates are generated in the reaction still firstly, then pressure is reduced by regulating a back pressure regulating valve, the balance condition of the natural gas hydrates is destroyed, and the natural gas hydrates are decomposed. Through three different types including sand filling, water and permeable water resistance film, simulation of natural gas storage is achieved; an interior exploring well has three segments totally and is used for studying exploration characteristics of different depths of the exploring well; a screen mesh is used for conducting secondary sand prevention in the exploring well, sand blocking is prevented, and it is more effectively guaranteed that experiments are conducted smoothly; silica gel is put in a gas-liquid separator in a gas-liquid collection device and prevents the water from entering a bumper, the gas-liquid separator is arranged on a balance, a pressure gauge is connected to the bumper, the pressure gauge and the balance are both connected with the data collection system, and thus the gas-liquid explored condition in the exploration process can be collected in real time.

The invention provides a diesel-gas-electric series-parallel type ship hybrid power system with a fuel cell. The diesel-gas-electric series-parallel type ship hybrid power system is composed of a diesel engine, a gas engine, electric generators, two motors, the fuel cell, a storage battery, permanent magnet couplers, two clutches, a gearbox, propellers, a natural gas storage and supply device, aninverter, a frequency converter, a rectifier and a distribution board. The diesel engine and the gas engine are connected with the gearbox through the permanent magnetic couplers, the two motors and the electric generators are connected with the gearbox through the clutches, the two clutches are arranged in the gearbox, and a power source includes the fuel cell and the storage battery. The layoutof various energy forms adopted by the diesel-gas-electric series-parallel type ship hybrid power system can meet the needs of ships in various environments and operating conditions, further improvesthe operating efficiency of the diesel engine, the gas engine and the motors, effectively reduces the fuel consumption and emissions of an engine, improves the dynamic response of the ships simultaneously, and the system has a wide range of application.

This invention relates to a method and a device for liquidizing natural gas, which uses a compressor only to compress a circulation cryogen and raw natural gas mixed by propane, ethane and methane to further liquidize natural gas, in which, the whole set includes a compressor, a cooler, a separating box of different components and a cooler of different components, a separation box of un-condensed gas and a liquid natural gas storage tank connected orderly, which puts forward a method for controlling the resorption volume of the components in the way of liquid-level monitor and the structure of the device after solving the problem of evaporization in stages and corresponding components in the resorption circulation crygen and only two sets of gas flows exchange heat to further simplify the device structure and its operation technology.

The invention discloses a small-sized skid-mounted mixed refrigerant natural gas liquefaction and NGL (Natural Gas Liquid) recovery integrated system. The system consists of a natural gas liquefaction module, a mixed refrigerant circulating module and an NGL recovery module, wherein the natural gas liquefaction module comprises a liquefaction cold box skid block, a low-temperature rectification skid block and a natural gas storage skid block which are sequentially connected; the mixed refrigerant circulating module comprises a mixed refrigerant compression skid block, a second-stage gas-liquid separator, a second-stage mixer, a first-stage refrigerant throttling device and a second-stage refrigerant throttling device; the NGL recovery module comprises a demethanation tower, a deethanization tower and a liquefied gas tower. The small-sized skid-mounted mixed refrigerant natural gas liquefaction and NGL recovery integrated system disclosed by the invention has the advantages that the process flow is simple, the system is quick to start, the maintenance is facilitated, the equipment skid formation is facilitated, the energy consumption is smaller and the adaptability to different gas sources is better.

A locomotive underframe CNG fuel storage system including: a crashworthy enclosure including a removable side panel and a permanent side panel welded into place; and at least one CNG cylinder module, wherein each CNG cylinder module includes a plurality of CNG cylinders stacked vertically, secured to a vertical wall, and separated by a horizontal plate, wherein the horizontal plate extends towards but does not contact the vertical wall when the vertical wall is planar and, further wherein, the horizontal plate supports the vertical wall from moving further out of plane when vertical axial weight causes the vertical wall for move out of plane towards the horizontal plate.

The invention discloses a gasoline and natural gas double-fuel double-jetting type engine and belongs to the technical field of internal combustion engines. The gasoline and natural gas double-fuel double-jetting type engine comprises a gasoline tank, an electrically controlled gasoline injector, a natural gas storage tank, a natural gas high-pressure stop valve, a natural gas reducing valve, a natural gas low-pressure stop valve, a natural gas jetting rail, an electronic control unit, and an electrically controlled natural gas injector. The electrically controlled natural gas injector is arranged on a gas inlet pipe behind an electronic gas throttling door; the natural gas jetting rail is connected with the electrically controlled natural gas injector through a natural gas pipeline. On one hand, the engine can use gasoline and natural gas at the same time, and can jet two fuels sequentially within a cycle; on the other hand, the engine can adopt a high compression ratio and ternary catalysis post-processing device to realize the purposes of high heat efficiency and nearly no particle discharge at the same time. The gasoline and natural gas double-fuel double-jetting type engine is rational in design, simple in structure and suitable for optimized design of double-fuel engines.

The present invention relates to an anchor structure able to actively cope with hull deformation, and to a liquid natural gas storage tank and a production method for a liquid natural gas storage tank comprising the anchor structure. According to one embodiment of the present invention, an anchor structure is provided wherein an anchor structure, for linking a sealing wall and an inner wall of a liquid natural gas storage tank, comprises: an anchor member adapted such that a joining part, which is joined to the sealing wall, can slide horizontally; and a thermally insulating material formed around the anchor member.

A method and system for energy recovery in a hydrogen or natural gas hybrid electric vehicle includes a turbine positioned between a compressed hydrogen or natural gas storage cylinder and an internal combustion engine. The turbine receives the compressed gas from the storage cylinder, reduces the pressure of the compressed gas, and supplies the compressed gas at a reduced pressure to the internal combustion engine. The turbine is connected to a generator and uses energy extracted from the pressure reduction of the compressed gas to drive the generator. The generator is further connected to a battery of the hybrid electric vehicle and acts as a power source for the battery.

The invention aims at providing a dual-shaft type gas-electric hybrid ship power system. The whole dual-shaft type gas-electric hybrid ship power system comprises a gas machine, a reversible shaft driven motor, a storage battery, a permanent magnet coupler, a clutch, a gearbox, a propeller, a natural gas storage and supply device, an inverter, a frequency converter, a rectifier and a switchboard.The dual-shaft type gas-electric hybrid ship power system is mainly characterized in that the gas machine is connected with the reversible shaft driven motor through the permanent magnet coupler; thereversible shaft driven motor is connected with the gearbox through the clutch; and the power source is the storage battery. According to the dual-shaft type gas-electric hybrid ship power system, theadopted layout of multiple energy forms can meet demands of a ship under various environments and working conditions, the operation efficiency of the gas machine and the reversible shaft driven motoris further enhanced, the fuel consumption and emission of the gas machine are effectively reduced, the power response of the ship is improved and the application range of the system is wide.

The invention aims to provide a gas-electric hybrid type ship hybrid power system with a super capacitor. The system comprises a gas machine, the super capacitor, a propeller, a natural gas storage and supply device and a ship load. The output end of the gas machine is connected with the input end of a gearbox, and the input end of a power generator is connected with the output end of the gas machine through a belt transmission transposition; the output end of the gearbox is connected with a motor, and the super capacitor, the power generator and a storage battery serve as power sources. The arrangement of various energy forms adopted by the system can meet requirements of ships under various environments and working conditions; the super capacitor is used for storing or releasing energy when the system load is changed so as to prevent the impact of the excessively quick energy change on a power grid, the operation efficiency of the gas machine, the power generator and the motor is improved, the utilization efficiency of fuel is improved, emission is reduced, the power response of the ships is improved, the application range of the system is enlarged, and the utilization rate of the fuel is further improved.

A compressed natural gas storage and dispensing system having bulk storage tanks in fluid communication with a natural gas supply source; a compressor to produce compressed natural gas; dispensing storage tanks in fluid communication with the bulk storage tanks and in fluid communication with fuel dispensers; a liquified natural gas storage tank in fluid communication with the bulk storage tanks, wherein compressed natural gas resulting from vaporization of the liquified natural gas within the liquified natural gas storage tank is transferred to the bulk storage tanks as a supplemental source of compressed natural gas, or wherein liquified natural gas is vaporized in an ambient vaporizer and delivered to the bulk or dispensing storage tanks.

The invention relates to a method for integrating producing, carrying and distribution of natural gas hydrates, comprising: producing the natural gas hydrates and storing it in the gas storing warehouse of lighter; when the natural gas hydrates is needed, supplying heat to the gas storing warehouse to attain gas storing warehouse; when needing remote transmission of gas storing warehouse, first using trailer boat bring the lighter to the destination, than, supply heat for exporting the natural gas hydrates and distribution; or using the lighter replace high pressure spherical tank as natural gas storing tank to supply natural gas in form of hydrates. Said invention integrates the storing, transmission and distribution of natural gas hydrates; since natural gas hydrates is solid, it is safe while lower energy consumption and cost.

The invention discloses an unloading and liquid adding device for a skid-type liquid adding station and an unloading and liquid adding method. The device comprises a storage tank prying block, a liquid adding prying block and a gas collecting prying block, wherein the storage tank prying block comprises a storage tank prying block base, a liquefied natural gas storage tank, a temperature preservation pipeline and a plurality of stop valves and a plurality of safety relief valves, wherein the plurality of stop valves and the plurality of safety relief valves are arranged on the temperature preservation pipeline; the liquid adding prying block comprises a liquid adding prying block base, an immersed pump, a pressurization and gasification device, a temperature preservation pipeline and a plurality of stop valves and a plurality of safety relief valves, wherein the plurality of stop valves and the plurality of safety relief valves are arranged on the temperature preservation pipeline; and the gas collecting prying block comprises a gas collecting prying block base, a gaseous natural gas storage tank and a temperature preservation pipeline. The device can achieve partial pipeline rapid precooling before unload and liquid adding, and has the function of collecting relieving gases, improves the safety and reliability, and reduces resource waste.

Embodiments provide systems and methods for taking power from an electric power grid and converting it into higher-pressure natural gas for temporary storage. After temporary storage, the higher-pressure natural gas may be expanded through an expansion engine to drive a generator that converts energy from the expanding natural gas into electrical power, which may then be returned to the electric power grid. In this way, the disclosed systems and methods may provide ways to temporarily store, and then return stored power from the electric power grid. Preferably, the components of the system are co-located at the same natural gas storage facility. This allows natural gas storage, electrical energy storage, and electrical energy generation to take place at the same facility.

A method to increase the storage capacity of a natural gas storage cavern includes effecting a heat exchange in a heat exchanger between a stream of coolant from a refrigeration or cooling plant and a natural gas stream to cool the natural gas stream prior to injecting the natural gas stream into the natural gas storage cavern.

A method of using the natural gas storage facility to reduce the effect of diurnal demand on a natural gas source includes introducing natural gas into the natural gas storage facility, separating the natural gas into a heavy natural gas component and a light natural gas component, and retaining the components during a non-peak period of demand. The natural gas storage facility includes a guard bed system and an adsorption bed system. The method also includes releasing the heavy and light natural gas components, mixing them into a released natural gas component product and introducing it to the natural gas source during a peak period of demand.