Energy-saving and carbon-reducing operation method of LNG station using warm seawater siphon mixing

Abstract

The application discloses an energy-saving and carbon-reducing operation method of LNG station by using warm seawater siphon mixing, and belongs to the technical field of energy-saving operation of LNG gasification station. The method relies on the potential energy and heat energy of the warm seawater, and divides the warm seawater conveying into two routes of siphon pipeline and pump pressurizing pipeline, and then converges into a main pipe. The siphon effect is formed by the vacuum pumping system to realize the self-flow of the warm seawater. The warm seawater and seawater are mixed in a seawater pump station forebay, and then are sent into an ORV to provide heat for LNG gasification. Meanwhile, the warm seawater flow is accurately controlled through a plurality of calculation formulas, the mixing ratio of the warm seawater and seawater is adjusted according to seasonal differences, the minimum film formation flow of the ORV and the environmental protection temperature discharge requirement are met. The application realizes the waste heat recycling of the warm seawater waste water of surrounding enterprises, greatly reduces the power consumption of the pump station, reduces the operation probability of the SCV gasifier, even realizes zero operation, significantly reduces the carbon emission of natural gas combustion, has the dual benefits of energy saving and carbon reduction, the technical measures are mature and feasible, and are suitable for popularization and application of the coastal LNG station.

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