Bypass steam line

Abstract

A mixing unit for mixing water with steam in a bypass station is provided. The mixing unit has a plurality of Laval nozzles arranged in the mixing unit, which Laval nozzles are displaced axially with respect to one another in a water steam direction, with the result that the noise emissions are reduced overall.

1 . A mixing unit for mixing a flow medium with a cooling medium, comprising
 a pipe conduit section, to which a mixing section is coupled fluidically,   the mixing section comprising a plurality of Laval nozzles, through which the flow medium can flow,   injection ducts formed in the Laval nozzles through which the cooling medium flows in such a way that mixing of the flow medium with the cooling medium takes place,   wherein the Laval nozzles are adjacent to one another and arranged to be offset in relation to one another in the direction of flow of the flow medium, and   wherein the Laval nozzles are coupled to a displacement device, allowing for displacement of the Laval nozzles during operation.   
     
     
         2 . The mixing unit as claimed in  claim 1 , wherein the Laval nozzles are designed identically to one another. 
     
     
         3 . The mixing unit as claimed in  claim 1 , wherein the injection ducts are formed obliquely to the Laval nozzle wall. 
     
     
         4 . The mixing unit as claimed in  claim 1 , wherein the flow medium comprises steam. 
     
     
         5 . The mixing unit as claimed in  claim 1 , wherein the cooling medium comprises water. 
     
     
         6 . The mixing unit as claimed in  claim 1 , wherein displacement takes place electrically. 
     
     
         7 . The mixing unit as claimed in  claim 1 , wherein displacement takes place hydraulically.