4 replies to this topic

[Rahimzadeh]

Dears:

 

Please tell me what is the best piont for taking sample of oxygen scavenger residual?

 

feed water or boiler water, which parameter must must be considered?

 

 

Best regards

 

M.R.Rahimzadeh

[shan]

What is the purpose for you to measure the content of oxygen scavenger residual? If you want to determine the additional oxygen scavenger injection rate (addition injection + residual = required content), you should take sample at feed water (condensate + makeup) downstream of the deaerator.

[chandan20]

i think the best point for measuring residual scavanger is after the de-aerator unit provided that u do have it. it wud be best if u cud provide us flow diagram for ur boiler feed water circuit.

[Rahimzadeh]

dear shan and chandan20:

thanks for participation

in bs2486 written the sample for measuring residual scavenger must be from blow doen tank but in asme has been written the sample must be after dearator.

the standard are contradiction with each other.

as you know at temperature inside boiler is high and no more scavenger remain in side boiler for residual measuring.

 

thank

[thorium90]

You know, its more common to measure DO than the amount of residual scavenger...