Sound damper for evaporation channels in steam power plants with air condensers

Abstract

A steam turbine unit, in particular for a steam power plant, comprising a steam turbine and a condenser connected to the steam turbine via an evaporation channel is provided. According to the following, a sound damper, particularly a low-frequency sound damper, is acoustically coupled to the evaporation channel.

1 - 10 . (canceled) 
     
     
         11 . A steam turbine unit having at least one steam turbine and a condenser which is connected to the steam turbine via a waste steam duct, wherein a silencer embodied as a reflection silencer is coupled acoustically to the waste steam duct and the silencer has multiple reflection chambers of different sizes and/or different volumes, which reflection chambers are each configured for filtering a very specific frequency range or frequency band. 
     
     
         12 . The steam turbine unit as claimed in  claim 11 , characterized in that the silencer is a low-frequency silencer. 
     
     
         13 . The steam turbine unit as claimed in  claim 11 , characterized in that the silencer is configured to damp frequencies below 500 Hz, in particular between 40 Hz and 500 Hz, more particularly between 60 Hz and 250 Hz. 
     
     
         14 . The steam turbine unit as claimed in  claim 11 , characterized in that the silencer is arranged in the waste steam duct such that waste steam from the steam turbine can flow through it. 
     
     
         15 . The steam turbine unit as claimed in  claim 11 , characterized in that the silencer has a drainage device, in particular a drainage device arranged in a chamber of the silencer. 
     
     
         16 . The steam turbine unit as claimed in  claim 11 , characterized in that the silencer is coupled acoustically to a hotbox, connected to the steam turbine, of the steam turbine unit. 
     
     
         17 . The steam turbine unit as claimed in  claim 11 , characterized in that the silencer is coupled acoustically to a further silencer, in particular in that the silencer is an interference silencer and the further silencer, coupled acoustically to the interference silencer, is an absorption silencer. 
     
     
         18 . The steam turbine unit as claimed in  claim 11 , characterized in that the steam turbine has multiple single- or multiple-flow turbine sections, in particular a single- or multiple-flow low-pressure, intermediate-pressure and/or high-pressure turbine section, each of which is connected to the condenser via a separate waste steam duct, wherein one or more silencer(s) is/are coupled acoustically to one, several or all of these waste steam ducts, or several or all of these turbine sections are connected to the condenser via a central waste steam duct, wherein the silencer is coupled acoustically to the central waste steam duct. 
     
     
         19 . The steam power plant having a steam turbine unit as claimed in  claim 11 , characterized in that the silencer is arranged within a machine casing. 
     
     
         20 . The steam power plant as claimed in  claim 11 , characterized in that the steam power plant is a coal-fired power plant, an oil-fired power plant or a gas-and-steam combined-cycle power plant. 
     
     
         21 . A silencer for use in a steam turbine unit having at least one steam turbine and a condenser which is connected to the steam turbine via a waste steam duct: said silencer embodied as a reflection silencer is coupled acoustically to the waste steam duct and the silencer has multiple reflection chambers of different sizes and/or different volumes, which reflection chambers are each configured for filtering a very specific frequency range or frequency band.