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