Liquefied natural gas automobile fuel system with adsorption tank

Abstract

The invention provides a liquefied natural gas automobile fuel system with an adsorption tank. The liquefied natural gas automobile fuel system comprises a liquefied natural gas storage tank, wherein the bottom outlet of the liquefied natural gas storage tank is connected with the inlet of a vaporizer through a control valve, the outlet of the vaporizer is connected with the inlet of a pressure reducer, the outlet of the pressure reducer is connected with a gas inlet channel of an engine, the gas exhaust channel of the engine is connected with the inlet of a tail gas purifier, the outlet of the tail gas purifier is connected with the inlet of an outer cavity of the adsorption tank, the top outlet of the liquefied natural gas storage tank is connected with the inlet of an inner cavity of the adsorption tank through a gas storage valve, and the outlet of the inner cavity of the adsorption tank is connected with the gas inlet channel of the engine through a gas supply valve. According to the invention, the characteristic that the adsorptive capacity of an activated carbon adsorbent to natural gas is significantly enhanced at low temperature is utilized; when a liquefied natural gas automobile stops, activated carbon is used for adsorbing low-temperature natural gas generated due to slow vaporizing of the fuel; and when the automobile runs, the high-temperature exhaust heat of the engine is utilized to adsorb activated carbon, and the released natural gas is supplied for the engine. Therefore, the liquefied natural gas automobile fuel system has the advantages of reliable operation, energy saving and environmental friendliness.

Description

technical field [0001] The invention relates to the technical field of liquefied natural gas vehicles, in particular to a fuel system for a liquefied natural gas vehicle with an adsorption tank. Background technique [0002] Adsorption storage of natural gas technology is to install a special adsorbent with high specific surface area and rich microporous structure in the storage tank, and use the van der Waals force between solid adsorbent molecules and natural gas molecules to adsorb natural gas. The lower the temperature and the higher the pressure, the stronger the adsorption capacity of the adsorbent. When the pressure in the storage tank is lower than the outside world, the gas entering the storage tank is adsorbed and stored, and the gas-filled adsorption is an exothermic process. When the pressure in the storage tank is higher than the outside world, the gas in the storage tank desorbs and leaves the storage tank, and degassing and desorption is an endothermic proces...

AI Technical Summary

Problems solved by technology

The current measure to solve this problem is that when the pressure in the fuel tank exceeds the set value, the safety valve will automatically open and vent, resulting in fuel waste and environmental pollution, and it is easy to cause safety hazards when the ventilation is not smooth.

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