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Sodium Concentration In Turbine

turbine steam sodium

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#1 ChemEPower


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Posted 22 December 2019 - 11:59 PM

At a power plant we use sodium bisulfide to scavenge oxygen from boiler feedwater.  Some of this bisulfide will wind up in the steam going to the turbine.  The turbine manufacturers have a sodium in steam limit of 3 to 5 ppb. 


1) Is this limit established to prevent chlorides from attacking the turbine components?

2) What is reason for sodium limit?  


3) Is sodium bisulfide is a concern for turbine protection.

4) If a sodium analyzer is used for measuring sodium concentration in steam, will it measure sodium from both Sodium chloride, Sodium bisulfite and sodium hydroxide etc ? (Like combined sodium concentration or just individual sodium type compound concentration) 


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