System and Method for Integrated precooled Mixed Refrigerant natural gas Liquefaction Cooling and

摘要

1. System and method of cooling and liquefying gas in heat exchanger, including compressing and cooling mixed refrigerant with the first compression and cooling cycle and the last cycle to form high-pressure liquid and steam flow. High pressure liquid and steam flow are cooled in a heat exchanger and then expanded by heating.A main cooling current is sent to the heat exchanger. The mixed refrigerant cools and balances between the first and last compression and cooling cycles, forming a pre injected liquid flow that cools in the heat exchanger. The current then expands and passes through the heat exchanger as a pre notified cooling flowThe utility model relates to a gas flow superheater, which cools the gas through the heat exchange of countercurrent, primary cooling flow and prior notice cooling flow, It is generated from the channel of primary cooling current and the current of two stages, comes out from the previous cooling current, exchanges from the hot end of current, and then carries out combination, and then carries out a conversion operation.Before the first compression and cooling cycle, heat and mass are distributed at the same time, so as to provide lower temperature steam flow to the first stage compressor, thus reducing the energy consumption of the system. in additionThe hot end of the cooling curve is about to close, further reducing the energy consumption, and the heavy components in the refrigerant are kept outside the cold end of the process, reducing the possibility of refrigerant freezing, and promoting the refrigerant management structure.