Condensation method

Abstract

A condensation method is described according to which exhaust steam from a turbine ( 1 ) of a condensation power plant is supplied to an air-cooled condenser ( 3 ) for condensation. The condensate (K) obtained in the condenser ( 3 ) is preheated in a condensate heating stage ( 6 ) prior to its supply to an evaporator upstream of the turbine ( 1 ) by means of a feed pump. The condensate (K) is heated by a partial steam flow (T) of the turbine ( 1 ). A degasifier ( 8 ) is mounted in parallel to the condensate heating stage ( 6 ) for degasifying the makeup feed water (W).

1 .- 7 . (canceled) 
   
   
       8 . A condensation method, comprising the steps of:
 feeding water from an evaporator to a turbine of a condensation power plant;   conducting an exhaust steam flow from the turbine through a condensate heating stage;   condensing the exhaust steam flow in an air-cooled condenser to produce a condensate flow;   heating the condensate flow, before being transferred into a condensate collecting tank, in the condensate heating stage by means of the turbine exhaust steam flow conducted through the condensate heating stage; and   feeding a partial steam flow exiting the condenser to a degasifier for heating cold makeup feed water tank.   
   
   
       9 . The condensation method of  claim 8 , wherein the air-cooled condenser operates in dephlegmator mode. 
   
   
       10 . The condensation method of  claim 8 , wherein the air-cooled condenser includes first heat exchanging elements operating in condenser mode and second heat exchanging elements operating in dephlegmator mode. 
   
   
       11 . The condensation method of  claim 8 , further comprising the step of transforming the condensate flow to form drops when undergoing the heating step. 
   
   
       12 . The condensation method of  claim 11 , wherein the transforming step includes the step of conducting the condensate flow across formed bodies. 
   
   
       13 . The condensation method of  claim 12 , wherein the transforming step includes the step of arranging the formed bodies in the form of a cascade. 
   
   
       14 . The condensation method of  claim 8 , further comprising the step of atomizing the condensate flow to form drops. 
   
   
       15 . A condensation method, comprising the steps of:
 conducting exhaust steam from a turbine through a first condensate heating stage, thereby condensing a portion of the exhaust steam;   condensing a remaining portion of the exhaust steam in an air-cooled condenser to produce a first condensate;   feeding the first condensate back to the first condensate heating stage for heating the condensate by means of the exhaust steam flowing through the first condensate heating stage; and   diverting a partial steam flow exiting the condenser to a second heating stage for heating incoming cold makeup feed water and producing a second condensate.   
   
   
       16 . The condensation method of  claim 15 , wherein the second heating stage includes a degasifier for degassing the makeup feed water. 
   
   
       17 . The condensation method of  claim 15 , further comprising the step of extracting gases forming in the condenser, first and second condensate heating stages, and degasifier. 
   
   
       18 . The condensation method of  claim 16 , wherein the second heating stage includes an excess steam condenser for condensing excess steam exiting the condenser during the extracting step by incoming cold makeup feed water. 
   
   
       19 . The condensation method of  claim 15 , further comprising the step of feeding the second condensate back to the first condensate heating stage.