Mixed gas filling device and mixed gas filling method of CNG and HCNG

Abstract

The invention relates to a mixed gas filling device and a mixed gas filling method of CNG and HCNG. The device comprises a pre-processing system, a mixed pressure raising system and a filling and storing system, wherein the pre-processing system is connected with the mixed pressure raising system and the filling and storing system and comprises a tube bundle CNG conveying trailer, a tube bundle hydrogen conveying trailer, a CNG gas discharging column, a hydrogen discharging column, a CNG purifier and a hydrogen purifier; the mixed pressure raising system comprises a special piston compressor unit for CNG, a special diaphragm compressor unit for hydrogen and a high pressure mixing device; the gas inlet of the special piston compressor unit for CNG is connected with the gas outlet of the CNG purifier, and the gas outlet of the special piston compressor unit for CNG is connected with the CNG gas inlet pipeline of the high pressure mixing device; the gas inlet of the special diaphragm compressor unit for hydrogen is connected with the gas outlet of the hydrogen purifier, and the gas outlet of the special diaphragm compressor unit for hydrogen is connected with a hydrogen inlet pipeline of the high pressure mixing device; and an HCNG gas outlet pipeline of the high pressure mixing device is connected with the filling and storing system. The mixed gas filling device and the mixed gas filling method provided by the invention can be widely applied to gas stations of HCNG automobiles and CNG automobiles.

Description

technical field [0001] The invention relates to a gas filling device and a gas filling method, in particular to a mixed gas filling device and a gas filling method of CNG (compressed natural gas) and HCNG (compressed natural gas mixed with hydrogen). Background technique [0002] HCNG is a gaseous fuel mixed with natural gas with methane (CH4) as the main component and hydrogen with a purity greater than 99%. ) of hydrogen. The combustion speed of hydrogen is high. Adding hydrogen to natural gas can increase the combustion speed of the mixture and improve the thermal efficiency. A small amount of hydrogen can widen the combustible mixing ratio of the mixture to achieve lean combustion. The use of HCNG instead of CNG as vehicle energy can greatly reduce vehicle exhaust pollution. With the continuous record high of international oil prices and the pressure of reducing air pollution, the prospects for the use of HCNG vehicles will become better and better. [0003] At present...

AI Technical Summary

Problems solved by technology

[0003] At present, the widespread use of CNG vehicles has led to an increasing number of CNG vehicle filling stations. However, the CNG vehicle filling station has a single function and can only satisfy CNG vehicles. With the maturity of HCNG engine and vehicle technology, it can fill HCNG vehicles. The demand for HCNG refueling devices is increasing

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