The invention discloses an LNG (
Liquefied Natural Gas)
fuel supply system for a super-large box ship, which is applied to the field of engine
fuel supply and is characterized in that an
air temperature gasifier and a water bath gasifier are arranged in series to realize two-stage gasification treatment on LNG, so that the risk that ungasified LNG damages a downstream pipeline is reduced, meanwhile, environmental
heat energy is preferentially utilized, and water bath heating is supplemented only when needed, so that the
energy consumption is reduced, and the
energy consumption is reduced. The operation
energy consumption is obviously reduced; meanwhile, the
electric heating pipe is used for assisting gasification in the engine starting stage, and the stable operation stage is switched to cylinder sleeve circulating hot
water heating, so that the gasification reliability under different working conditions is guaranteed; in addition, the
system further seals a pipeline valve and a
flange through a sealing box, environmental
moisture contact is reduced, the risks of
icing of the outer walls of a connector and the valve, jamming of
moving parts and sealing performance reduction are reduced,
humidity in the box is reduced in cooperation with a dehumidifier,
airflow is guided to flow circularly through a partition plate, and the dehumidification efficiency and the anti-freezing effect are further improved.