This invention relates to the field of
marine engineering technology, and in particular to a marine
liquefied petroleum gas (LPG)
fuel supply system. The
system includes an LPG
storage tank, a refueling module, a low-pressure pump, a high-pressure pump, a
heat exchanger, a valve
assembly, an engine, a recirculation tank, a dual pressure relief
system, and a
nitrogen system. The refueling module achieves safe LPG refueling and gas-phase
reflux through dual interfaces; the low-pressure and high-pressure pumps work together in the
reflux pipeline to stabilize fuel pressure, and the water-glycol circulation system, in conjunction with the
heat exchanger, precisely regulates fuel temperature; unconsumed fuel is recovered to the
storage tank for recycling via the return valve
assembly and recirculation tank; the dual independent pressure relief system, combined with a gas-liquid separator, intercepts liquid LPG, and the
nitrogen system performs pipeline replacement and purging. This system solves the problems of unstable pressure, fuel waste, emission
pollution, and insufficient safety protection inherent in traditional technologies. It provides stable
fuel supply, high
utilization rate, and is safe and
environmentally friendly, meeting the
operational requirements of marine LPG dual-fuel engines.