Gas filling substation additional high-pressure gas-filling method and device

Abstract

The gas adding sub station with the gas adding method in high pressure and the device is made by the gas supplying system of three lines sequence in gas adding station, the high pressure gas supping system connected with the multi lines gas in auto sequencing gas adder. In keeping the normal gas adding pressure, the additional high pressure gas supplying system is opened; the gas adder adds the gas to out according to the low, middle, high pressure and additional high pressure sequence, so the gas supplying time of the low pressure gas bottle is prolonged. The invention has the high gas getting effect and gas transforming effect; it also can save the energy, has low cost, stable gas adding pressure to increase the set distance between the gas adding sub station and mother station, to enlarge the radiating field to benefit for using the gas automotive.

Description

technical field [0001] The invention relates to a gas filling method and device for a compressed natural gas gas filling substation, in particular to an additional high-pressure gas filling method and device. Background technique [0002] At present, the gas filling method and device of the existing compressed natural gas filling sub-stations at home and abroad are three-line sequential supply with three sets of low, medium and high-pressure gas cylinder groups and corresponding gas supply pipelines connected with the three-line intake type gas filling machine. gas system. According to the sequence of low, medium and high pressure, the method of getting gas from the gas cylinder group and filling gas vehicles uses a three-line filling machine, which is usually called a three-line sequential filling method. In reality, when gas vehicles are refueled, the amount of natural gas remaining in the vehicle cylinders varies, and the pressure of the remaining gas is different, so no...

AI Technical Summary

Problems solved by technology

In particular, the refueling sub-station that uses skid-mounted gas cylinders for gas supply adopts the three-line sequential gas filling method. When refueling vehicles with a lot of residual gas and high residual gas pressure, the pressure of the medium and high pressure gas cylinders will drop. Faster, the pressure of the low-pressure gas cylinder group is still 8-10MPa, and the pressure of the high-pressure gas cylinder group can no longer maintain the normal gas filling of 16-20MPa stipulated in the National Automobile Refueling Station Design and Construction Code (GB50156-2002) scope

In order to maintain the normal gas filling pressure of the gas filling substation, new high-pressure gas cylinders had to be replaced, resulting in low gas intake rate of the gas cylinders, large waste of energy consumption, increased operating costs, and large fluctuations in gas filling pressure , poor stability

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