Liquefied compressed natural gas high pressure piston pump pipeline system
A technology for high-pressure plunger pumps and compressed natural gas, applied in pipeline systems, gas/liquid distribution and storage, mechanical equipment, etc., can solve problems such as high-pressure plunger pump cavitation, unstable LNG liquid flow, etc., and prolong service life , Solve the recovery and utilization of LNG residual pressure, and improve the effect of economic benefits
Active Publication Date: 2019-09-10
ENRIC (LANGFANG) ENERGY EQUIP INTEGRATION CO LTD +1
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- Claims
- Application Information
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Problems solved by technology
[0005] The purpose of this application is to, on the one hand, provide solutions that can solve the problems of unstable LNG liquid flow delivered by the high-pressure plunger pump and cavitation of the high-pressure plunger pump; Residual pressure recycling and other issues
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[0029] While the invention may readily be embodied in different forms, only some of these are shown in the drawings and will be described in detail in this specification, with the understanding that the specification should be considered as the These are exemplary illustrations of the principles of the invention and are not intended to limit the invention to what is described herein.
[0030] Thus, a feature indicated in this specification will be used to describe one of the features of an embodiment of the present invention, rather than implying that every embodiment of the present invention must have the described feature. Furthermore, it should be noted that this specification describes a number of features. Although certain features may be combined to illustrate possible system designs, these features may also be used in other combinations not explicitly described. Thus, the illustrated combinations are not intended to be limiting unless otherwise stated.
[0031] In the...
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The invention provides a liquefied compressed natural gas high pressure piston pump pipeline system. The liquefied compressed natural gas high pressure piston pump piping system includes a high pressure piston pump, a liquid inlet pipe, a liquid outlet pipe, a gas phase pipe and a backflow pipe. The liquid inlet pipe is in communication with a liquid inlet of the high pressure piston pump. The liquid outlet pipe is in communication to a liquid outlet of the high pressure plunger pump. One end of the gas phase pipe is in communication with a gas return port of the high pressure plunger pump, and the other end of the gas phase pipe is in communication with the liquid outlet pipe. A gas return pipe is provided with an exhaust port, and a first emergency shut-off valve is arranged on the gas phase pipe. One end of the backflow pipe is in communication with the liquid inlet pipe, the other end of the backflow pipe is in communication with the liquid outlet pipe, and a second emergency shut-off valve is arranged on the backflow pipe. When the high pressure piston pump is started or stopped, the first emergency shut-off valve is opened, and liquefied gas is discharged through the exhaustport to release the pressure inside the liquid outlet pipe. The first emergency shut-off valve is closed, the second emergency shut-off valve is opened, a gas-liquid two-phase mixture of the liquefiednatural gas flows back into the liquid inlet pipe and then enters the high pressure plunger pump to be circulated, and gas-liquid separation is carried out on the gas-liquid two-phase mixture.
Description
technical field [0001] The invention relates to a liquefied compressed natural gas system, in particular to a liquefied compressed natural gas high-pressure plunger pump pipeline system. Background technique [0002] The process of transforming liquefied natural gas (LNG) into compressed natural gas (CNG) through pressurization and gasification is referred to as liquefied-compressed natural gas L-CNG. The high-pressure plunger pump is the main core equipment in the L-CNG filling station to pressurize the 1.2MPa low-pressure LNG to form 25MPa high-pressure LNG. After the LNG in the low-temperature storage tank is pressurized by the high-pressure plunger pump, the high-pressure LNG is adjusted by the temperature of the gasifier and other equipment to become high-pressure CNG with ambient temperature, and finally the car that uses CNG as fuel is refueled through the gas dispenser. [0003] During the pressurization process of the above-mentioned LNG, the low-temperature LNG li...
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Login to View More IPC IPC(8): F17D1/08F17D3/01
CPCF17D1/082F17D3/01
Inventor 李宝成孙林宋建霖拜继运黄凯
Owner ENRIC (LANGFANG) ENERGY EQUIP INTEGRATION CO LTD