VACUUM BOILER TYPE EVAPORATOR

摘要

The invention is concerned with a vacuum boiler type evaporator comprising a sealed vacuum boiler vessel (10) having a lower portion (12) in which water is contained, and an upper portion in which a steam chamber is defined. The invention provides that, separate from the boiler (10), there is a sealed vacuum condenser vessel (20) including a set of heat transfer tubes (24) through which liquefied natural gas flows, heating means (11,12) for heating said vacuum boiler vessel (10) to said condenser vessel (20), a condensate return pipe (22) for delivering condensate from said condenser vessel (20) to said vacuum boiler vessel (10), and collector means for removing noncondensable gas from said condenser vessel (20).