Steam power plant with steam turbine unit and process steam consumer, and method for operating a steam power plant with steam turbine unit and process steam consumer

Abstract

A steam power plant having at least one steam turbine unit and a process steam consumer is provided. The process steam consumer includes a heat exchanger. The steam turbine unit is connected to a heat exchanger by means of a extraction steam line, and a desuperheater is connected in the primary side of the extraction steam line, so that process steam extracted through the extraction steam line of the turbine system may be conditioned by the desuperheater to the process conditions of the process steam consumer, and the heat energy removed in the desuperheater can be fed back into the steam power plant system.

1 - 8 . (canceled) 
     
     
         9 . A steam power plant, comprising:
 a steam turbine unit;   a desuperheater; and   a process steam consumer, comprising:
 a heat exchanger, 
   wherein the steam turbine unit is connected via a bleed line to the heat exchanger, and   wherein the desuperheater is connected into the bleed line on the primary side.   
     
     
         10 . The steam power plant as claimed in  claim 9 , further comprising a water-steam cycle with a main condensate line and a return condensate line, and
 wherein the desuperheater is connected into the return condensate line on the secondary side.   
     
     
         11 . The steam power plant as claimed in  claim 9 , wherein the process steam consumer is a separator for carbon dioxide from a flue gas. 
     
     
         12 . The steam power plant as claimed in  claim 9 ,
 wherein the steam turbine unit comprises a intermediate-pressure turbine and a low-pressure turbine,   wherein the intermediate-pressure turbine is connected to the low-pressure turbine via a crossover line, and   wherein the bleed line branches off from the crossover line.   
     
     
         13 . A method for operating a steam power plant with a steam turbine unit and a process steam consumer, comprising:
 extracting superheated steam from the steam turbine unit at a first process stage;   desuperheating the superheated steam at a second process stage wherein heat is extracted from the superheated steam and slightly superheated steam is formed; and   feeding the conditioned steam to the process steam consumer.   
     
     
         14 . The method as claimed in  claim 13 , wherein the steam power plant comprises a water-steam cycle and the heat which is extracted from the superheated steam is fed to the condensate of the water-steam cycle of the steam power plant. 
     
     
         15 . The method as claimed in  claim 13 , wherein in the process steam consumer the conditioned steam is used for a carbon dioxide separating process. 
     
     
         16 . The method as claimed in  claim 13 , wherein the superheated steam is extracted from the steam turbine unit from a crossover line between an intermediate-pressure stage and a low-pressure stage.