198 results about "Compressed natural gas" patented technology

The invention relates to the technical field of aluminum melting furnaces, in particular to an aluminum ingot melting device which comprises a gas system and a melting system. The fuel gas system comprises a first gas cylinder, and compressed natural gas is contained in the first gas cylinder. The melting system comprises a melting furnace, the melting furnace is provided with a melting space, and a plurality of first combustion ports are formed in the side wall, corresponding to the melting space, of the melting furnace; when the aluminum ingot melting device works, an aluminum ingot in the melting space is rapidly heated to a first temperature, the aluminum ingot is in an unmelted state when the first temperature is reached, and after the first temperature is reached, unburnt compressed natural gas is directly blown to the aluminum ingot through the first burning port, so that the aluminum ingot is cooled and cracked or an oxide layer is cracked; after cooling for a preset time, heating the aluminum ingot with the cracked surface until the aluminum ingot is molten; according to the method, the aluminum ingot is rapidly heated to the non-molten state, then through rapid cooling and thermal expansion and cold contraction, an oxide layer is cracked or broken, the aluminum ingot is cracked and even broken, and the heating effect is improved through reduction of a subsequent heating oxide film or increase of the contact area.

Provided are a micro-scale apparatus and method for liquefying natural gas The apparatus comprises a first heat exchanger that cools a natural gas feed stream by heat exchange with a first cooling fluid from a chiller, a compressor configured to compress the cooled natural gas, an air cooler configured to further cool the compressed natural gas, a second heat exchanger configured to further cool the natural gas by heat exchange with a second cooling fluid, a third heat exchanger configured to further cool the cooled natural gas, a joule-thompson (JT) valve configured to cool the flow of cooled natural gas to create LNG, a separator configured to separate a liquified LNG from a vapour phase, and a return flow path connected to the natural gas inlet, wherein the return flow path is optionally configured to pass as cooling medium via the third heat exchanger, wherein optionally the return flow path is configured to transport the vapour phase from the separator via the third heat exchanger for heating by heat exchange a gas flow entering the inlet of the third heat exchanger, and to combine the heated vapour phase with the natural gas feed stream.

The utility model discloses a compressed natural gas unloading pry utilizing solar energy, which comprises a box body, two paths of heating, pressure regulating and metering devices are arranged in the box body, and two unloading columns are arranged on one side of the box body. The compressed natural gas unloading pry can effectively solve the problems that the compressed natural gas unloading pry selects and utilizes heat sources, distribution of temperature and pressure, control of return pressure, prevention of gas leakage and the like, so that the compressed natural gas unloading pry is more energy-saving and environment-friendly when being used; and meanwhile, the stability of the water and electricity dual-purpose two-stage heat exchanger in the box body can be fully guaranteed, so that the safety and the stability of the compressed natural gas unloading pry are guaranteed.

The invention discloses a hydrogen-doped natural gas experiment method based on a fuel gas micro-grid. The method comprises the following steps: providing hydrogen and natural gas; mixing the provided hydrogen and natural gas; compressing the mixed hydrogen and natural gas in a compression area; the compressed hydrogen and the compressed natural gas are respectively conveyed to an urban hydrogen doping experiment area and a terminal user experiment area; pressurizing the hydrogen-doped natural gas in the low-pressure experimental area to the high-pressure experimental area by using a compressor in the urban hydrogen-doped experimental area; the hydrogen-doped natural gas is used by equipment in a terminal user experiment area, and hydrogen is provided by a pure hydrogen pipeline, a hydrogen cylinder group or a hydrogen long pipe trailer; natural gas is provided by a natural gas pipeline, a CNG tank car or an LNG tank car, according to the overall design method of the natural gas hydrogen doping experiment system, the quality of the natural gas hydrogen doping experiment can be systematically improved from multiple aspects of gas source supply, hydrogen doping gas mixing, hydrogen doping flow, hydrogen doping conveying, hydrogen doping pressurization and terminal users, and the natural gas hydrogen doping experiment system has the advantages of being simple in structure, safe, stable and high in functionality.

The utility model relates to the field of sewage treatment, in particular to CNG (compressed natural gas) field station sewage treatment equipment which comprises a sedimentation tank, an anaerobic tank, an aerobic tank and a sewage treatment component, and the sewage treatment component comprises a round pipe, a motor, an auger, a discharge pipe, a first water pump, a second water pump, a first communicating pipe and a second communicating pipe; the anaerobic tank and the aerobic tank are used for treating microorganisms in sewage, the motor drives the auger to rotate, the auger slowly rotates to prevent impurities which are precipitated due to too high rotating speed, and the feed port is formed in one end, far away from the motor, of the round pipe, so that precipitates conveniently enter the round pipe; impurities are lifted and discharged from a discharging pipe in the rotating process of the auger, settled sewage is pumped into an anaerobic tank through a first communicating pipe by a first water pump, sewage treated by the anaerobic tank is pumped into an aerobic tank through a second communicating pipe by a second water pump, and a water outlet pipe is arranged at one end of the aerobic tank, so that the device is conveniently communicated with subsequent treatment.

The invention relates to the technical field of gas well liquid drainage, in particular to a liquid drainage testing system and a liquid drainage testing method, and aims to solve the technical problem that in the prior art, a power liquid drainage and mining technological process is complex. The liquid drainage testing system can achieve gas well liquid drainage with compressed natural gas as power, liquid drainage does not occupy an oil sleeve annulus, and a gas production channel is reserved; in addition, compressed natural gas is used as power, if the adjacent well has sufficient gas source, the natural gas of the adjacent well can be introduced to implement liquid drainage, and a natural gas compressor is not needed to pressurize, so that the construction cost is further reduced, and the gas production efficiency is improved.

This disclosure presents a method for dispensing compressible fluids, specifically natural gas, using a heat exchanger to optimize temperature and pressure conditions. The process involves receiving a first supply stream at an initial temperature and expanding a second supply stream to a lower pressure. Heat is exchanged between these streams within the heat exchanger, reducing the temperature of the first stream for efficient dispensing. This method is particularly suited for filling compressed natural gas (CNG) tanks, ensuring continuous operation without interruptions. The system maintains the first stream's pressure below 4,500 psig and achieves a target density based on reference conditions. Additionally, the method supports integration with natural gas pipelines, maintaining suitable discharge temperatures. The approach enhances energy efficiency by eliminating the need for auxiliary refrigeration, making it ideal for onsite wellhead applications. This innovative system offers a streamlined solution for CNG operations, promoting economic and environmental benefits.

Externally pressurized gas is used to provide a gas seal and gas lubrication for a piston rod packing unit of a reciprocating compressor. The externally pressurized gas can also be used to provide gas lubrication for the cylinder via flow of the externally pressurized gas through the piston of the reciprocating compressor. The gas seal and gas lubrication can reduce or eliminate greenhouse gas emissions from a reciprocating compressor used to compress natural gas.

The utility model relates to the technical field of natural gas unloading, and discloses a CNG tank car unloading system based on heat recovery, which comprises a first pressure reducing valve and a compressor, and the gas inlet end of the compressor is communicated with a tank car gas cylinder filled with compressed natural gas through a first pipeline. The gas outlet end of the compressor is communicated with a CNG gas leakage pipe network through a second pipeline, the first coil heat exchanger is arranged on the first pipeline in a coiled mode, the second water outlet is communicated with the first water inlet through a first water passing pipe, and the second water outlet is communicated with the second water inlet through a second water passing pipe. The inlet end of the liquid pump is communicated with the first water outlet through a second water pipe, and the outlet end is communicated with the second water inlet through a third water pipe. Heat transfer and management in the gas discharging process can be achieved, the system operation cost is reduced, and the system is green, efficient and energy-saving.

The utility model provides an efficient gas-liquid separator of a large-flow CNG (compressed natural gas) pressure regulating device, which comprises a lower shell, an upper shell is arranged at the top of the lower shell, a gas outlet pipe is fixedly communicated with the top of the upper shell, and a gas guide pipe communicated with the gas outlet pipe is fixedly connected below the gas outlet pipe in the upper shell; the dismounting mechanism is used for connecting the lower shell and the upper shell; a dismounting and mounting mechanism is arranged, the upper shell and the lower shell are connected under the action of a flange through mutual cooperation of a connecting hole and a fixing bolt, dismounting and mounting are convenient, the opening and closing state cannot be easily changed, under mutual cooperation of a sealing groove and a sealing ring, the air tightness between the upper shell and the lower shell is improved, a fixing plate is fixed to the needed position, and the sealing effect is good. And the lower shell is inserted into the mounting ring, so that the lower shell can be limited, the lower shell is prevented from shaking and inclining, the disassembly and assembly are convenient, and the sealing performance is good.

The utility model relates to the technical field of natural gas production, in particular to a front-mounted high-pressure rear-mounted dehydration device for compressed natural gas, and aims to solve the technical problems that after a molecular sieve of a dehydration device absorbs water, long-time reduction dehydration is needed, dehydration operation cannot be carried out in the period, and the production time is wasted. Comprising a normal-pressure gas inlet pipe, a compressor, a multi-way valve, a high-pressure gas inlet pipe, a dehydration tank, a molecular sieve, a valve pipe, a high-pressure exhaust ring, a high-pressure exhaust pipe and a molecular sieve reduction mechanism, normal-pressure natural gas is compressed and injected into the dehydration tank through the compressor, the natural gas penetrates through the molecular sieve and is exhausted through the valve pipe, and dehydration is completed; the controller controls the multi-way valve to switch the gas transmission dehydration tank, close the valve pipe of the previous dehydration tank and open the valve pipe of the new dehydration tank, the dehydration operation is continued in this way, and the molecular sieve in the previous dehydration tank is controlled by the controller to be subjected to dehydration reduction by the molecular sieve reduction mechanism to wait for the next dehydration operation, so that continuous dehydration is realized, and the production time is not wasted.

The utility model discloses a gas station and CNG (Compressed Natural Gas) filling station safety supervision device based on the Internet of Things, which comprises a mounting structure, a pair of gun type cameras and a spherical camera, the mounting structure comprises a top ring, a plurality of mounting holes are formed in the top ring along the circumferential direction, mounting bolts are in threaded connection in the mounting holes, a U-shaped frame is arranged below the top ring, and a disc is arranged in the middle of the U-shaped frame. A rotating shaft is arranged on the disc, the spherical camera is fixed below the rotating shaft, a top cover shell is arranged on the disc, an equipment box is arranged on the top cover shell, and connecting mechanisms used for assembling the gun type camera are symmetrically arranged below the top ring. The camera has the advantages that a lens is convenient to clean, the image quality is improved, and the monitoring range is rapidly adjusted.

This application relates to methods and systems for lubricating devices. Methods and systems for a compressed natural gas fuel rail are provided. In one example, a system includes a device having a first volume for containing compressed natural gas and a second volume for containing a lubricant, the first volume and the second volume being disposed in a single housing and separated by a barrier. Lubricant flow from the second volume to the first volume can be regulated by regulating a pressure of the second volume such that a pressure differential between the second volume and the first volume is increased to increase lubricant flow or the pressure differential is decreased to decrease lubricant flow.

The invention relates to the technical field of compressed natural gas automobiles, and discloses a 35MPa compressed natural gas supply system and method for an automobile, and the system comprises a gas cylinder cabin, a gas filling cabin and an engine cabin; a plurality of carbon fiber fully-wound gas cylinders with the rated pressure of 35MPa are mounted in the gas cylinder cabin; a cylinder valve is integrated with a flow sensor, a temperature sensor and a pressure sensor; a gas filling port, a one-way valve, a high-pressure pressure gauge, a high-pressure stop valve, a high-pressure precision filter and a pipeline overcurrent protection valve are mounted in the gas filling cabin, the one-way valve and the high-pressure stop valve are jointly connected to one end of the pipeline overcurrent protection valve, and the other end of the pipeline overcurrent protection valve is connected with a high-pressure gas storage bottle; a high-pressure electromagnetic valve and a high-pressure pressure reducer are mounted in the engine compartment; the other end of the high-pressure electromagnetic valve is connected with the high-pressure precision filter; according to the scheme, the cabin thought design is adopted, the integration and modularization degree is high, the combination requirements of different gas cylinder sets can be met, installation and layout of different vehicle types are facilitated, a 35 MPa compressed natural gas automobile can be smoothly implemented, and the scheme is particularly suitable for being used by a 35 MPa compressed natural gas truck.

The invention relates to the technical field of hydrogen production, and discloses a natural gas and methanol coupling type integrated hydrogen production device, which is used for producing high-purity hydrogen through synergistic reforming of natural gas and methanol, and comprises: a raw material input unit, which comprises a natural gas compressor, a methanol pump and a water treatment system, the compressed natural gas, the liquid methanol and the purified water are respectively provided; the pretreatment unit comprises a desulfurizer, a methanol vaporizer and a steam generator and is used for removing sulfides in the natural gas, converting methanol into gas and generating high-pressure steam; in the third reaction area, water gas shift and in-situ CO2 capture are carried out through a WGS catalyst and an adsorbent, the CO conversion rate is larger than or equal to 95%, the CO2 capture rate is larger than or equal to 90% and is increased by 10-20% compared with post-treatment capture, TSA regeneration is carried out, specifically, a thermal coupling heat exchanger provides heat for driving TSA regeneration, and the purity gt of released CO2 is achieved; 95% of the CO2 is conveyed to a CO2 collecting tank. An external heat source is not needed, and energy consumption is saved by 10-15%.

The utility model discloses a compressed natural gas (CNG) pressure reducing device with a segmented pressure reducing function, which comprises a box body, a first gas storage box is fixedly connected to the inner wall of one side of the box body, a second gas storage box is fixedly connected to the inner wall of the other side of the box body, a gas pump is fixedly connected to the side wall of one side of the first gas storage box, and a gas outlet is formed in the side wall of the other side of the box body. And one side of the air pump is fixedly connected with an air inlet pipe, and the air inlet pipe penetrates through the side wall of one side of the first air storage box. Through the arrangement of the first gas conveying pipe, the second gas conveying pipe, the first flow dividing pipe and the second flow dividing pipe, natural gas is divided through the first gas conveying pipe, the second gas conveying pipe, the first flow dividing pipe and the second flow dividing pipe; and the shunted compressed natural gas is subjected to two-stage pressure reduction on each line through the first heat exchanger, the first pressure regulating valve, the second heat exchanger, the second pressure regulating valve, the third pressure regulating valve, the third heat exchanger and the fourth pressure regulating valve, so that the compressed natural gas is subjected to pressure reduction use, and the pressure reduction efficiency of the compressed natural gas can be improved by adopting a natural gas shunting mode.

The invention provides a CNG continuous gas discharging device and method for a point supply station, and relates to the technical field of compressed natural gas supply stations, three gas discharging column pipelines are arranged in parallel, and each gas discharging column pipeline is provided with a pressure sensor; two independent pressure reducing pipelines are arranged in the pressure reducing pry, and the input end of the pressure reducing pry is connected with the output ends of the three gas discharging column pipelines; the outlet flow meter is arranged on the downstream pipe network; the controller is electrically connected with the outlet flow meter, the pressure sensors and the regulating valves on the gas discharging column pipelines; according to the device, the first gas discharge column pipeline, the second gas discharge column pipeline and the third gas discharge column pipeline which are connected in parallel and are communicated with one another are arranged, and the first parallel pipeline and the second parallel pipeline are matched to realize three-path gas source intercommunication, so that the problem that gas supply is still possibly interrupted during switching due to dependence on limited-capacity gas storage tube bundles in comparison files is solved; and the continuous and uninterrupted gas supply effect of multi-vehicle cooperation and mutual standby is achieved.

Systems and methods are provided for a combined defuel and priority panel for a fueling station. The defuel and priority panel is configured to defuel a compressed natural gas (CNG) vehicle and direct the defueled gas to fuel other CNG vehicles at the panel fueling and defueling site. The defuel and priority panel is also configured to store defueled gas in defuel storage tanks, which can then be used to later fuel CNG vehicles.

The utility model discloses a compressed natural gas dehydration reactor which comprises a gas inlet pretreatment device, a compression tank, a water-gas separator and a drying box which are sequentially communicated through pipelines, a gas inlet valve is installed on the pipeline at the gas inlet end of the gas inlet pretreatment device, and a gas outlet valve is installed on the pipeline between the compression tank and the water-gas separator. An exhaust valve is mounted on the pipeline at the air outlet end of the drying box; and drain valves are mounted on a drain pipe I at the bottom end of the compression tank and a drain pipe II at the bottom of the water-air separator. Through the arrangement of the inlet gas pretreatment device, natural gas can be filtered and pre-pressurized, a drain valve and a gas outlet valve of the compression tank are prevented from being blocked, the natural gas in the compression tank can be better pressurized by the gas pressurization device, and the dehydration effect of water in the natural gas is better; according to the natural gas dehydration device, three-stage dehydration treatment can be performed on natural gas, the dehydration effect on the natural gas is guaranteed, and the quality of the natural gas is better.

The invention discloses video detection equipment for monitoring a compressed natural gas storage well, which comprises a video detection shell, and an ultrasonic detection instrument is fixedly arranged on the front side of the lower end of the video detection shell; the assembling structure is mounted on the upper side of the interior of the video detection shell and is used for connecting internal parts of the video detection equipment; the centralizing structure is movably mounted on the outer side of the middle part of the video detection shell, and is used for centralizing the video detection equipment and improving the detection efficiency of the video detection equipment; and the disassembly and maintenance structure is installed on the outer side of the lower end of the video detection shell and used for maintaining the camera, and the disassembly and maintenance structure comprises a fixed cylinder. According to the video detection equipment for monitoring the compressed natural gas storage well, a video detection instrument can be conveniently centralized, the video detection instrument can be conveniently assembled, and a camera can be conveniently disassembled and maintained.

The invention discloses a damping mounting structure for a CNG gas storage tank, and relates to the field of CNG gas storage tanks, the damping mounting structure comprises a bottom plate, the top of the bottom plate is connected with a supporting seat, the top of the supporting seat is connected with a tank main body, the top of a plug pin is slidably connected with a positioning pin in a penetrating manner, and the side surface of the positioning pin is slidably connected with a B-type pin in a penetrating manner; external connection blocks are symmetrically fixed to the side faces of the supporting base. According to the damping installation structure for the CNG gas storage tank, when the gas storage tank is installed, the tank body is swung to the top of the supporting base through mechanical equipment, the annular groove in the side face of the tank body is moved to the side face of the tightening steel belt, the steel belt is rotated to wrap the annular groove, and the end of the tightening steel belt is rotated to the inner side of the fixed connecting block; the positioning pin is inserted into the bolt, the bolt can be prevented from sliding out of the fixed connecting block by locking the positioning pin through the B-shaped pin, then the rotating rod is rotated to drive the fixed connecting block to move downwards, the fixed connecting block can pull down the steel belt to squeeze the tank body, positioning of the steel belt is achieved, and the installation stability and efficiency are improved.

The utility model relates to a device for producing low-carbon alcohol and co-producing CNG (compressed natural gas) by biomass gasification, which can effectively solve the problems of high energy consumption, large investment, resource waste, environmental pollution and the like in production in the prior art, and adopts the technical scheme that the device comprises a biomass gasification furnace, a dust removal purifier, a compressor and a cooler, a gas outlet of the biomass gasification furnace is connected with a gas inlet of the dust removal purifier, a gas outlet of the dust removal purifier is connected with a gas inlet of the compressor, a gas outlet of the compressor is connected with a gas inlet of the desulfurization purifier, and a gas outlet of the desulfurization purifier is connected with a gas inlet in the top of the low-carbon alcohol reactor. According to the low-carbon alcohol and CNG production device, agricultural and forestry waste resources are fully utilized, green products of low-carbon alcohol and CNG which are low in production energy consumption, small in investment, free of pollution and free of carbon emission are produced, and the low-carbon alcohol and CNG production device is an innovation of low-carbon alcohol and CNG product production devices.

The invention discloses a natural gas and compressed air collaborative energy storage system and method for multi-type underground spaces. According to the system, first underground gas storage spaces and second underground gas storage spaces are distributed at intervals; the outlet end of the compressor is connected with the upper end of the first compressed air injection well through a heat exchanger cold side channel. The first air pump is connected with the upper end of the first compressed air recovery well and connected with the inlet end of the expansion machine through a heat exchanger hot side channel. The outlet end of the natural gas compressor connected with the overground gas storage is connected with the natural gas injection well I through an electric control valve; a gas inlet of the overground gas storage is connected with the upper end of the first natural gas recovery well through a second gas pump. The turbine generator is connected with the overground gas storage through a third gas pump and meanwhile connected with the heat exchanger. The method comprises the following steps: in an energy excess period, adopting a strategy of preferentially compressing air energy storage or preferentially compressing natural gas energy storage or alternately storing the compressed air energy storage and the natural gas energy storage at intervals, and in an energy shortage period, adopting a strategy of preferentially generating power or preferentially supplying gas or generating power and simultaneously utilizing natural gas for afterburning and improving efficiency. According to the invention, efficient utilization of energy can be realized.

The utility model discloses a compressed natural gas storage device which comprises a storage steel cylinder body, the top of the storage steel cylinder body is communicated with a gas inlet one-way valve pipeline, and the top of the gas inlet one-way valve pipeline is provided with a protective sleeve. Firstly, the protective sleeve is arranged at the top of the air inlet one-way valve pipeline, then the fixing block rotates with the fixing rod as the center to stir the stirring elastic piece, and the fixing block is driven by the fixing ring to drive the protective sleeve to move downwards to be arranged at the top of the air inlet one-way valve pipeline; and finally, the fixing block is clamped on the surface of the air inlet one-way valve pipeline under the shifting of the shifting elastic piece, so that the top of the air inlet one-way valve pipeline is stably protected by the protective sleeve, and the beneficial effects that dust is prevented, and potential safety hazards caused by dust accumulation on the air inlet pipeline are not likely to happen are achieved. The mode that the top of the air inlet pipeline is not dustproof due to the fact that the top of the storage steel cylinder body is not provided with a protection structure in the prior art is replaced, and the safety of the storage steel cylinder body in use is improved.

The utility model discloses a connector for testing a compressed natural gas bottle, which comprises a compressed natural gas bottle body and a connector body which is in threaded connection with the interior of the upper end of the compressed natural gas bottle body and is used for detection, the left end of the connector body is in threaded connection with a first conversion connector, and the right end of the connector body is in threaded connection with a second conversion connector; a long pipe is integrally connected to the lower left end of the connector body, a notch is formed in the lower right end of the connector body, a lifting assembly capable of being limited is arranged on the upper side of the connector body, and the lifting assembly comprises a lifting ring, a threaded rod, a limiting plate, a limiting hole and a lifting hook. Connecting plates are fixedly connected to the upper end of the connector body in a front-back symmetrical mode, mounting blocks are connected to the outer ends of the connecting plates in an embedded mode, and waterproof springs are fixedly connected into the mounting blocks. The connector for testing the compressed natural gas cylinder is convenient to install and prevents falling off during testing, the tested gas cylinder can be conveniently hoisted, falling off during hoisting is prevented, and meanwhile hidden dangers during water injection are prevented.

A compressed natural gas (CNG) metering and regulation station includes a primary skid frame comprised of a first plurality of steel members while a secondary skid frame is comprised of a second plurality of steel members that are reconfigurable using brackets for attaching to the first plurality of steel members. The station includes both infra-red (IR) and ultra-violet (UV) gas leak detect systems for detecting gas leaks. A roofed building extends over the primary skid frame and secondary skid frame. One or more lifting lug assemblies are used that extend through the roof of the building for providing lifting points for the CNG metering and regulation station building.

The present invention relates to a compressed natural gas combustion and exhaust system comprising: (i) a natural gas combustion engine; and (ii) an exhaust treatment system comprising an inlet for receiving exhaust gas from the combustion engine and a catalytic article arranged to receive and treat the exhaust gas, the catalytic article comprising a substrate having at least a first coating and a second coating, the first coating being free of platinum group metals and comprising a copper-containing zeolite having a CHA framework type, and the second coating comprising a palladium-containing zeolite, the first coating being arranged to contact the exhaust gas prior to the second coating. The present invention further relates to methods and uses.

The utility model discloses a CNG storage cylinder fixing device which comprises an annular fixing sleeve, a plurality of abutting plates are installed on the surface of the annular fixing sleeve in a sliding and penetrating mode, limiting rods are welded to one sides of the abutting plates, and an adjusting assembly used for driving the limiting rods to move at the same time is arranged on the outer side of the annular fixing sleeve. A blocking assembly used for blocking one side of the CNG storage cylinder is installed on one side of the annular fixing sleeve, two electric push rods are fixedly installed on the other side of the annular fixing sleeve, a mounting base is fixedly installed at one end of an inner rod of each electric push rod, and a second connecting rod is rotatably installed on the inner side of each mounting base. And a second baffle ring is fixedly mounted between the two second connecting rods. The position of the abutting plate is changed through the adjusting assembly, so that the abutting plate can limit the gas storage tanks with different outer diameters, the second baffle ring and the second connecting rod can rotate, and the second baffle ring is driven by the electric push rod to transversely move to abut against the gas storage tanks so as to fix the gas storage tanks.

The present invention relates to a catalytic material for treating an exhaust gas produced by a natural gas engine, which catalytic material comprises a molecular sieve and a platinum group metal (PGM) supported on the molecular sieve, wherein the molecular sieve has a framework comprising silicon, oxygen and germanium, and has a content of heteroatom T-atoms of ≤about 0.20 mol %, wherein the germanium is present in an amount of from 15 to 20 mol %. The present invention further relates to a catalyst article and a compressed natural gas combustion and exhaust system.

The utility model relates to the technical field of water-containing gas well exploitation, in particular to a movable natural gas lift drainage fast moving device which comprises a trailer, a pre-processing device and a natural gas supercharging device. The trailer comprises a trailer head and an axle; a natural gas supercharging device and a pre-treatment device are arranged on the axle, and the natural gas supercharging device is connected with the pre-treatment device; the pre-treatment device comprises a defoaming tank, a buffer separator, a vortex separator, a precision filter, a gas-liquid multiphase pump and a high-pressure plunger pump; the natural gas supercharging device comprises a generator set, a natural gas engine and a reciprocating compressor. Pretreatment and compression of natural gas are completed through the mobile device, then the compressed natural gas is pumped into an oil pipe or a casing pipe of a gas well, accumulated liquid at the bottom of the well is discharged, stable liquid discharging and continuous production of the gas well are achieved, and the device has the advantages of being convenient to move, safe, reliable, high in adaptability and low in operation cost.