Method for Warming-Up a Steam Turbine

Abstract

There is described a method for heating a steam turbine comprising a medium-pressure turbine section and/or a low-pressure turbine section, the discharge end of the medium-pressure turbine section being provided with a catchment device. Steam penetrating the medium-pressure turbine section during a starting process is retained at an outlet by means of a catchment device in such a way that the pressure of the steam increases in the medium-pressure turbine section. The steam that is discharged from the medium-pressure turbine section is retained, thus increasing the pressure and the temperature of the steam. Heat transfer from the steam to the thick-walled parts located on the medium pressure turbine section and the shaft of the medium-pressure turbine section is augmented, thus reducing the starting time of the steam turbine.

1 .- 8 . (canceled) 
   
   
       9 . A method for warming-up a steam turbine having an intermediate-pressure turbine section, comprising:
 providing a intermediate-pressure turbine section, wherein the intermediate-pressure turbine section has an accumulating device on an outlet side; and   accumulating steam which flows through the intermediate-pressure turbine section during a starting process at the outlet, based upon the accumulating device such that the pressure of the steam in the intermediate-pressure turbine section is increased, such that a saturation temperature of the steam is increased.   
   
   
       10 . The method as claimed in  claim 9 , wherein the accumulating device is arranged in an overflow line. 
   
   
       11 . The method as claimed in  claim 9 , wherein the accumulating is controlled. 
   
   
       12 . The method as claimed in  claim 10 , wherein the accumulating is controlled. 
   
   
       13 . The method as claimed in  claim 9 , wherein the accumulating device has a pivotable flap. 
   
   
       14 . The method as claimed in  claim 10 , wherein the accumulating device has a pivotable flap. 
   
   
       15 . The method as claimed in  claim 11 , wherein the accumulating device has a pivotable flap. 
   
   
       16 . The method as claimed in  claim 12 , wherein the accumulating device has a pivotable flap. 
   
   
       17 . The method as claimed in one of  claim 9 , further comprising accumulating the steam on the outlet side to values of between 3 and 5 bar, and between 130° C. and 150° C. 
   
   
       18 . The method as claimed in one of  claim 10 , further comprising accumulating the steam on the outlet side to values of between 3 and 5 bar, and between 130° C. and 150° C. 
   
   
       19 . The method as claimed in one of  claim 11 , further comprising accumulating the steam on the outlet side to values of between 3 and 5 bar, and between 130° C. and 150° C. 
   
   
       20 . The method as claimed in one of  claim 12 , further comprising accumulating the steam on the outlet side to values of between 3 and 5 bar, and between 130° C. and 150° C. 
   
   
       21 . A steam turbine plant, comprising:
 an intermediate-pressure turbine section; and   an accumulating device arranged on an outlet side of the intermediate-pressure turbine section.   
   
   
       22 . The steam turbine plant as claimed in  claim 21 , wherein the accumulating device has a pivotable flap. 
   
   
       23 . The steam turbine plant as claimed in  claim 21 , wherein the accumulating device is arranged in an overflow line. 
   
   
       24 . The steam turbine plant as claimed in  claim 22 , wherein the accumulating device is arranged in an overflow line. 
   
   
       25 . The steam turbine plant as claimed in  claim 21 , wherein the outlet side withstands steam with a pressure between 3 and 5 bar, and a temperature between 130° C. and 150° C. 
   
   
       26 . The steam turbine plant as claimed in  claim 22 , wherein the outlet side withstands steam with a pressure between 3 and 5 bar, and a temperature between 130° C. and 150° C.