Gas-supply method of CNG gas-charging station for automobile

Abstract

The present invention discloses a gas supply method for vehicle CNG gas station (including ordinary, standard, sub-station gas stations) which is supplied gas by the natural gas pipe network or CNG mobile gas supply vehicles one by one. Said CNG mobile gas supply vehicles supply gas for the CNG gas station through gas releasing device; the high pressure gas releasing mouth of said gas releasing device is equipped with two gas releasing channels which supply gas to the high pressure gas storing device and the gas station separately; the medium (low )pressure gas releasing mouth of said gas releasing device is equipped with two gas releasing channels which supply gas for the medium or low pressure gas storing device and the gas station; said gas releasing device is equipped with residual gas releasing channel which is connected with the inlet of CNG gas station compressor technology system and supplies gas for the compressor. The advantages are: the CNG gas station has the function of CNG sub-station gas station at the same time, the CNG mobile gas supply vehicles can supply gas when the pipe network can not supply gas, the gas releasing speed is fast and the gas releasing is exhaustive. The operation is controlled intelligently and the operation is safe and reliable. So the disposition number of the CNG mobile gas supply vehicles is reduce, the CNG gas station technology and equipment resources are used fully and the CNG sub-station costs are reduced.

Description

technical field [0001] The invention relates to a CNG filling station for automobiles, in particular to its gas supply method. Background technique [0002] CNG (compressed natural gas) is rapidly promoted in my country as a clean vehicle energy because of its cleanliness and economy. By June 2005, more than 80 cities in my country had developed a total of 140,000 gas vehicles (including modified dual-fuel vehicles), and 535 CNG filling stations for various types of vehicles had been built, ranking seventh in the world. CNG filling network. [0003] There are three types of CNG filling stations for automobiles: [0004] One is ordinary CNG gas filling station (including standard gas filling station, see process flow diagram 1). This type of gas filling station is built near the natural gas pipeline network and is directly supplied by the natural gas pipeline network. Ordinary gas filling stations are affected by the stock and distribution of natural gas resources. When re...

AI Technical Summary

Problems solved by technology

However, the existing CNG sub-station technology is backward, and the equipment is simple, and the technology of the CNG mobile gas supply vehicle to unload the CNG sub-station is flawed, the unloading speed is slow, the time is long, the gas cannot be completely unloaded, and the remaining gas is as high as 15~ 25%, a huge waste of transport capacity, gas suppliers have to configure a large number of gas supply vehicles to meet the gas supply needs, equipment investment and transportation costs are high

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