Management of supply gas composition variation for high pressure expander process

摘要

How to liquefy the supply gas flow. The refrigerant flow is cooled, expanded, expanded, and produces a cooled refrigerant flow. Part or all of the expanded and cooled refrigerant flow is mixed with the replenishing refrigerant flow in the separator, thereby condensing heavy hydrocarbon components from the replenishing refrigerant flow, resulting in a gaseous expanded and cooled refrigerant. Form a stream. The gaseous expanded and cooled refrigerant flow forms a warm refrigerant flow through the heat exchanger zone. The supply gas flow is passed through the heat exchanger zone, expands, and indirect heat exchange with the cooled refrigerant flow cools at least a portion of the supply gas flow, thereby forming a liquefied gas flow. The warm refrigerant flow is compressed to produce a compressed refrigerant flow. [Selection diagram] Fig. 2