APPARATUS FOR DEGASSING A CONDENSER OPERATING IN A THERMAL CYCLE

摘要

A composite structure operating under a vacuum for condensing steam discharged from a turbine unit of a thermal power plant and de-gassing the condensate prior to feeding it back to the boiler for recycling comprises a condenser casing having an inlet for the steam which pases downwardly over a cooling tube bundle to effect its condensation. The condensate is then passed through a three stage de-gasifier to remove noncondensables such as oxygen. The first stage injects steam issuing from the subsequent stages into a condensate flowing downwardly on opposite sides of a gabled roof located beneath the tube bundle to accomplish an initial de-gasification; the second stage injects steam into a first tank filled by condensate collected from the roof to accomplish further degasification by the bubbling effect produced by the steam injection; and the third stage injects steam into a layer of the condensate flowing across a weir from the first tank into a reserve tank to accomplish final de-gasification.