104 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 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 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.

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.

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 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.

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 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.

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.

This invention relates to the field of hydrogen production technology and discloses an integrated hydrogen production device coupled with natural gas and methanol. This device produces high-purity hydrogen through the synergistic reforming of natural gas and methanol. The device includes: a raw material input unit comprising a natural gas compressor, a methanol pump, and a water treatment system, used to provide compressed natural gas, liquid methanol, and purified water, respectively; a pretreatment unit comprising a desulfurizer, a methanol vaporizer, and a steam generator, used to remove sulfides from the natural gas, convert methanol into gas, and generate high-pressure steam. In the third reaction zone, water-gas conversion and in-situ CO2 capture are performed using a WGS catalyst and adsorbent, achieving a CO conversion rate ≥95% and a CO2 capture rate ≥90%, which is 10–20% higher than post-treatment capture. TSA regeneration: a thermally coupled heat exchanger provides heat to drive TSA regeneration, releasing CO2 with a purity >95%, which is then transported to a CO2 collection tank. No external heat source is required, saving 10–15% of energy consumption.

The present invention relates to a cylinder valve for compressed natural gas cylinder with integrated pressure reducing function, which is connected to a general burner in a plug and play manner. The cylinder gas of the present invention is improved to increase the safety of gas use and to make it easier to adjust the required gas flow rate. The cylinder valve comprises a first part as an improved part, a second part as a main part directly connected to compressed natural gas, and a third part as an evaporator part. The second part contains a diaphragm in order to accelerate the gas flow, and the third part is an evaporator which is used to overcome the clogging by accelerating the evaporation of the clogging formed due to the cooling caused by the pressure drop.

The utility model relates to the field of natural gas filling devices, particularly discloses a compressed natural gas (CNG) conveying hose gas filling device, and solves the technical problems that an independent gas storage tank is usually adopted in the conventional CNG storage, and the gas stored in the tank is difficult to be utilized completely. The gas filling device comprises a first gas storage tank provided with a first gas inlet pressurizing pipe; the second air storage tank is provided with an air outlet hose; the connecting pipeline is connected with the first gas storage tank and the second gas storage tank, and a flow meter is arranged in the connecting pipeline; the flow control assembly comprises a driving part and an elastic part which are connected, the elastic part is arranged on one side in the connecting pipeline in the radial direction of the connecting pipeline, and the driving part drives the elastic part to stretch out and draw back so that the elastic part can abut against or be arranged on the other side of the connecting pipeline at intervals, the effective section of the connecting pipeline can be changed, and the flow of the connecting pipeline can be controlled. The pressurization operation ensures the stability of the output gas and the complete utilization of the gas in the gas storage tank.

The utility model relates to the technical field of pressure reducing valves, and provides a compressed natural gas pressure reducing valve heating structure and a compressed natural gas pressure reducing valve, the compressed natural gas pressure reducing valve heating structure comprises a pressure reducing valve body, the pressure reducing valve body is provided with a hollow cavity, a plurality of heating pieces are embedded in the inner wall of the hollow cavity, and the heating pieces are arranged in the circumferential direction of the cavity of the pressure reducing valve body; and is connected in series with the power supply. According to the utility model, the plurality of heating pieces are embedded in the inner wall of the hollow cavity of the pressure reducing valve body, are arranged along the circumferential direction of the cavity of the pressure reducing valve body and are connected in series, so that electric energy is quickly converted into heat energy, and the heating function of the compressed natural gas pressure reducing valve is realized; compared with a structure of using circulating water to heat the pressure reducing valve, the heating time is short, the structure is simple, a heating system does not need to be additionally arranged independently, and the cost is lower.

A refuse vehicle has a tailgate. The tailgate has a framework to secure CNG tanks. A cover overlays the frame work to provide an aesthetic appearance to the vehicle.

The utility model belongs to the technical field of natural gas transportation, and particularly relates to a gas filling hose for compressing natural gas, which comprises a gas filling pipe, and further comprises a connector A, an exhaust nozzle, a connector B, a positioning ring, a blocking piece, a guide strip, a ventilation piece and a spring which are arranged on one side of the gas filling pipe, and the exhaust nozzle is fixedly mounted on the inner surface of the connector A. According to the device, rapid connection between gas filling pipes can be realized under the action of the connector A and the connector B, so that rapid and stable operation of gas filling work is ensured; and after gas filling work is completed, the connector B can be blocked under the action of a spring and a blocking piece, then it can be guaranteed that dust or impurities in air cannot enter the two ends of the gas filling pipe, the cleanliness of the interior of the gas filling pipe can be guaranteed, and the influence on the quality of natural gas can be avoided.

The present invention relates to the technical field of aluminum melting furnaces, and particularly relates to an aluminum ingot melting device, which includes a gas system and a melting system; the gas system includes a first gas cylinder, and the first gas cylinder contains compressed natural gas; the melting system includes a melting furnace, the melting furnace has a melting space, and a plurality of first combustion ports are arranged on the side wall of the melting furnace corresponding to the melting space; when the aluminum ingot melting device works, the aluminum ingots in the melting space are quickly heated to a first temperature, and when reaching the first temperature, the aluminum ingots are in an unmelted state. After reaching the first temperature, the unburned compressed natural gas is directly blown towards the aluminum ingots through the first combustion ports, causing the aluminum ingots to crack due to cooling or the oxide layer to crack. After cooling for a predetermined time, the aluminum ingots with cracked surfaces are heated to melting; in the present invention, the aluminum ingots are quickly heated to an unmelted state and then quickly cooled. Due to thermal expansion and contraction, the oxide layer cracks or breaks, and the aluminum ingots themselves crack or even break. Subsequently, the reduction of the heating oxide film or the increase in the contact area improves the heating effect.

The utility model discloses a CNG (compressed natural gas) new energy bus natural gas cylinder mounting and adjusting tool, which belongs to the technical field of gas cylinder mounting and adjusting and comprises an adjusting belt, a quick mounting component is arranged at one end of the adjusting belt, the adjusting belt is mounted on an adjuster through the quick mounting component, and the other end of the adjusting belt bypasses a gas cylinder and penetrates through the adjuster. The quick mounting assembly comprises two fixed clamping plates and a limiting frame, and the two fixed clamping plates are rotationally connected with the combined arc plate; the adjustor comprises an auxiliary handle, the upper end of the auxiliary handle is fixedly connected with an adjustor body, and a metal square ring is rotationally arranged on the adjustor body. The quick mounting assembly is arranged at one end of the adjusting belt, the adjusting belt is mounted on the adjustor through the quick mounting assembly, and the other end of the adjusting belt bypasses the gas cylinder and penetrates through the adjustor, so that the gas cylinder can be fastened and clamped; and a worker grabs the auxiliary handle to control the regulator to lift up, so that the gas cylinder is clamped by the regulating belt, and the position of the gas cylinder is conveniently regulated in the mounting process.

This invention provides a catalytic article useful for treating exhaust gas emissions from compressed natural gas (CNG) engines. [Solution] A three-way catalytic converter article and its use in an exhaust system for a compressed natural gas engine are disclosed. A catalytic converter article for treating exhaust gas from a compressed natural gas (CNG) engine, comprising: a base material having an axial length L and including an inlet end and an outlet end; a first catalytic region beginning at the outlet end and extending over less than the axial length L, comprising a first PGM component; and a second catalytic region beginning at the inlet end and comprising a second PGM component, wherein the first PGM component comprises palladium, platinum, or a combination thereof, and the second PGM component comprises rhodium.

The utility model relates to the technical field of natural gas production, in particular to a special heating device for a compressed natural gas decompression pry, and aims to solve the technical problem that waste heat is remained in preheated and decompressed natural gas, and energy waste is inevitably caused by direct discharge of the waste heat. The tail end of the first spiral gas conveying pipe is communicated with a second spiral gas conveying pipe through an elbow, the first spiral gas conveying pipe and the second spiral gas conveying pipe are the same in diameter, screw pitch, spiral starting position and spiral ending position and are connected to the inner wall of the heating chamber, and the upper end of the second spiral gas conveying pipe is communicated with a spiral exhaust pipe through a pressure reducing valve. The spiral exhaust pipe is spirally wound on the gas inlet pipe, the gas conveying pipe is of a double-spiral structure, compared with a single-spiral gas conveying pipe, on the premise that the pipe length is the same, the preheating effect of the double-spiral gas conveying pipe is better than that of the single-spiral gas conveying pipe, and waste heat of natural gas is conducted to the gas inlet pipe outside a medium through the spiral exhaust pipe for preheating and waste heat recovery.