Multistage compression energy-saving utilization technology of overall fuel gas type natural gas compressor

Abstract

The invention relates to a multistage compression energy-saving utilization technology of an overall fuel gas type natural gas compressor. The multistage compression energy-saving utilization technology mainly relates to a gas engine tail gas complementary energy utilization system I and a natural gas separation and heat exchange system II for a natural gas compressor unit. The gas engine tail gas complementary energy utilization system I is mainly used for converting high-temperature heat energy of engine tail gas into kinetic energy of a pneumatic motor to further drive a refrigeration device to refrigerate manifold inlet gas, and the natural gas separation and heat exchange system II is used for refrigerating natural gas which is initially separated by a normal-temperature gravity separator to carry out low-temperature re-separation, then carrying out heat exchange on the re-separation gas before entering first-stage pressurizing and pressurized gas in a heat exchanger, and then enabling the gas to enter an interstage separator for next-stage pressurizing. Initial separation, low-temperature separation and interstage separation are carried out on the manifold inlet gas, the work efficiency of the compressor unit can be improved, gas consumption for the per-unit yield of the compressor unit is reduced, energy sources are saved, internal accumulated liquid of a compression cylinder can also be reduced, and the service life of the compression cylinder of the compressor unit and the service life of a gas inlet-and-outlet valve are prolonged.

Description

technical field [0001] The invention belongs to the field of energy-saving technology utilization of natural gas compressors, and relates to an energy-saving utilization technology of integral gas-type natural gas compressors for petrochemical supercharging, gathering and transportation. Mobility is provided by a gas engine. Background technique [0002] Energy reuse and energy saving and consumption reduction technologies have become widespread concerns around the world. In the field of energy-consuming equipment, energy-saving technology is mainly reflected in two aspects, one is to cherish energy conservation and reuse of surplus energy, and the other is to improve work efficiency and reduce energy consumption per unit of output. Among them, improving work efficiency and reducing energy consumption per unit output is the main embodiment of energy-saving utilization. The invention uses the residual energy of the compressor unit to recycle the heat energy of the exhaust ga...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a multi-stage compression energy-saving utilization technology for integral gas-fired natural gas compressors, which can achieve energy-saving effects by further separating impurities such as natural gas water vapor to improve the working efficiency of the unit, so as to solve the reciprocating compression of this integral structure Problems of high energy consumption and low work efficiency

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