Method and apparatus for detecting corrosion in steam turbine installations
AssigneeBBC Brown, Boveri & Company, Limited
InventorsMaurice A. Bodmer, Robert Svoboda
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Abstract
A process and a device for detecting the occurrence of corrosion during the operation of steam turbines are disclosed, wherein working medium is taken from the steam turbine and partially condensed. The condensate is separated from the remaining steam and the quantities of both the remaining steam and the condensate are determined. The condensate is continuously examined for aggressive materials. The condensate is then subjected to chemical and physical analysis in a test apparatus. To detect corrosivity, a prestressed metal test piece and a metal bursting disc are arranged in a condensate vessel in contact with the condensate.
Claims17
A method of detecting the occurrence of corrosion in a steam turbine during operation, comprising the steps of:
- continuously withdrawing a representative sample of working steam from the turbine;
- condensing a portion of the working steam sample to form a condensate;
- controlling the quantity of said working steam sample which is condensed such that a predetermined percentage of the sample is condensed;
- separating the condensate from the remaining steam;
- determining the quantity of the remaining steam;
- continuously testing the condensate for corrosivity;
- and
- returning the remaining steam to the turbine.
An apparatus for detecting corrosion in a steam turbine during operation comprising:
- first line means for continuously withdrawing a representative sample of working steam from the steam turbine at a predetermined point in the steam turbine;
- condenser means for condensing a portion of the steam sample received through the first line means to form a condensate;
- separator means for separating the condensate from the remaining steam;
- testing means for continuously testing the condensate for corrosivity;
- second line means for returning the remaining steam to the turbine;
- a flow meter for determining the quantity of remaining steam arranged in the second line means;
- and
- control means for controlling the quantity of said working steam sample which is condensed such that a predetermined percentage of the sample is condensed.
Dependencies are inferred from the claim text.