Hydraulic natural gas automobile secondary gas filling station

Abstract

The invention relates to a hydraulic-typed natural gas automobile gas-adding sub-station, comprising a CNG sub-station trailer, a sub-station prizing body, a PLC control cabinet, wind air source equipment, a gas alarm and a gas adding machine; the CNG sub-station trailer is fixed with 8 independent pressure vessels; the front end of each pressure vessel is respectively fixed with a pneumatic air outlet valve and the rear end thereof is respectively fixed with a pneumatic oil inlet valve and a pneumatic oil returning valve in parallel; the pneumatic air outlet valve, the pneumatic oil inlet valve and the pneumatic oil returning valve are respectively communicated with the gas adding machine and the sub-station prizing body by pipelines; the sub-station prizing body comprises a prizing body, a liquid storage tank, a pressurization system, a medium liquid and an exhaust device. The hydraulic-typed natural gas automobile gas-adding sub-station has the advantages of little investment of CNG sub-station construction, high working capacity, high gas yield, low running expense, automatic control, extremely little maintenance, and stable running.

Description

technical field [0001] The invention relates to a hydraulic natural gas vehicle filling substation. Background technique [0002] At present, there are two types of natural gas vehicle refueling stations commonly used at home and abroad: 1) the gas refueling stations that use natural gas from the pipeline transportation system (pipe network) and sell it on the spot after compression are called standard stations; 2) use the natural gas from pipelines Natural gas is compressed by multiple large-scale equipment and transported in high-pressure containers to distributed gas station groups in different places, which is called the mother-substation system. The centralized compression station is called the parent station, and the gas filling station with the on-board pressure vessel as the gas source is the sub-station, that is, the CNG sub-station. There are 8 steel cylinders installed on the long-tube transport vehicle used in the CNG substation, and all 8 cylinders are connecte...

AI Technical Summary

Problems solved by technology

The station gas storage cylinder group of the substation is composed of a high-pressure gas storage cylinder group with a maximum working pressure of 25MPa and a medium-pressure gas storage cylinder with the same pressure resistance. The method is called the three-line sequential gas filling method. Although it can improve the gas extraction rate of the gas cylinder and the working efficiency of the compressor, the equipment for supplementing the pressure of the gas storage cylinder group used in the station is a sub-station compressor, which is complicated and expensive.

Due to the compressibility and compression heat of gas, the efficiency of converting mechanical properties into compression energy is not high, and the power consumption is relatively large. This is the reason why the substation has the largest investment and high operating costs.

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