Urban emergency LNG (liquefied natural gas) supply system

Abstract

The invention discloses an urban emergency LNG (liquefied natural gas) supply system, which comprises an LNG steel cylinder, a gasifying device, a pressure regulating device, a metering device and an odorizing device which are sequentially communicated. The LNG steel cylinder comprises a bottom main liquid outlet and an auxiliary liquid outlet led out of a gas-phase space of the LNG steel cylinder, the pressure regulating device and the metering device refer to a pressure-regulating metering skid adopting three pipelines to regulate pressure, the main liquid outlet is connected with the gasifying device, the auxiliary liquid outlet is connected with the pressure-regulating metering skid through a gasifier, the rear end of the pressure-regulating metering skid is respectively connected with a plurality of gas supply outlets, and LNG liquid in the LNG steel cylinder is sequentially subjected to gasification, pressure regulation, metering and odorization so as to be outputted from the gas supply outlets. The urban emergency LNG (liquefied natural gas) supply system is free of a power source or other power sources, is conveniently movable at any time, emergency gas supply for specific users is guaranteed, and influence of gas supply stop accidents is reduced.

Description

technical field [0001] The invention relates to the field of liquefied natural gas (LNG: Liquefied Natural Gas) gas supply, in particular to an urban gas supply system for gas supply in emergency situations. Background technique [0002] With the rapid growth of LNG supply channels and supply, it is used for conventional gas sources of urban pipeline gas, transitional gas sources of pipeline natural gas, peak-shaving and emergency gas sources of urban natural gas, LNG vehicle refueling, LNG transit storage, LNG filling, etc. The construction of functional urban LNG stations has also been developed rapidly. On this basis, a gas supply mode similar to liquefied oil and gas pipelines has emerged. Combined with urban LNG stations with LNG filling functions, some cities have also appeared LNG bottle group gasification stations for residential or industrial and commercial users. The gas storage, gasification and gas supply facilities of the above-mentioned LNG stations are all fi...

AI Technical Summary

Problems solved by technology

The gas storage, gasification and gas supply facilities of the above-mentioned LNG stations are all fixed at one location, supplying gas to a certain area or providing peak shaving and emergency gas sources, but they cannot supply emergency gas to the local pipeline network system

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