The invention belongs to the technical field of ships, and particularly relates to a system for treating excess BOG (boil-off gas) by using fuel cold energy for an LNG (liquefied natural gas) ship. The system comprises an N2 heat exchanger, a compressor, an expansion machine, a precooling heat exchanger, a BOG compressor, an N2 compressor, a seawater heat exchanger, a low-temperature heat exchanger, a cold energy release heat exchanger, an ethane supply valve, an ethane circulating pump, a supply valve, a stop valve, a cold energy storage heat exchanger and an LNG cargo hold. In order to solve the problem that when an LNG ship sails at a low speed or in a maneuvering mode or sails in a stormy day, a ship main engine cannot completely consume BOG generated in an LNG cargo hold, the cold energy of BOG used for burning of the main engine is used for liquefying the excessive BOG in the LNG cargo hold, waste of the cold energy of BOG used for burning of the ship main engine is reduced, power consumption of reliquefaction of the excessive BOG is reduced, and the energy consumption of the LNG cargo hold is reduced. And the method has good economical efficiency and practicability.
本发明属于船舶技术领域,具体涉及一种LNG船利用燃料冷能处理过剩BOG的系统。该系统包括N2换热器、压缩机、膨胀机、预冷换热器、BOG压缩机、N2压缩机、海水换热器、低温换热器、冷能释放换热器、乙烷供给阀、乙烷循环泵、供给阀、截止阀、冷能储存换热器、LNG货舱。本发明针对LNG船低速航行、机动航行或风浪天航行时,船舶主机无法完全消耗掉LNG货舱内所产生的BOG的问题,通过利用主机燃用BOG的冷能去液化LNG货舱内过剩BOG,减少了船舶主机燃用BOG冷能的浪费,而且降低了过剩BOG再液化的功耗,具有良好的经济性和实用性。
Ammonia-powered ship fuel leakage treatment system
一种氨动力船燃料泄漏处理系统
2025-04-25
Patent
Electronic Resource
Chinese
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