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Consensus on Operating Practices for Control of Water and Steam Chemistry in Combined Cycle and Cogeneration

By
Edward Beardwood
Edward Beardwood
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ISBN:
9780791859988
No. of Pages:
64
Publisher:
ASME Press
Publication date:
2012

The first action to be taken in case of exceeding specified chemical limits is to check the sampling system for the following:

• Adequate sample flow

• Correct sample temperature

• Exhausted cation exchanger cartridge

• Out-of-calibration analyzer (oxygen, silica, pH, conductivity, sodium)

Table 5 lists some of the more typical problems, their causes and the necessary countermeasures. Use of blowdown as a corrective action should be a temporary action until the chemistry parameter is brought back into conformance. NOTE: This list is an example only and may be incomplete. Each deviation from a specified value requires careful investigation.

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