FIELD: machine building.
SUBSTANCE: invention describes a liquefied natural gas plant that uses a removal system of non-condensed material from one or more cooling cycles within the plant and its operation method. The method involves cooling of natural gas flow in the first closed cooling cycle and in an open cooling cycle so that additionally cooled natural gas flow is obtained. Non-condensed material is separated from at least some part of cooled natural gas flow in the first separating capacity so that mainly bottom liquid fraction depleted with non-condensed components and mainly top steam fraction enriched with non-condensed components are obtained. Top steam fraction enriched with non-condensed components is supplied to a fuel gas system to be used as fuel gas. Bottom liquid fraction is returned mainly to a methane cooling agent of the open cooling cycle.
EFFECT: use of the invention will allow stabilising operation of the plant in case of abrupt changes in concentration of the incoming natural gas flow supplied to the plant.
27 cl, 3 dwg
