i would like to know if there is any chemical determination of finding out the presence of scale in the boiler tubes?

 

Shift Charge Engineer... the lead-in paragraph states boiler performance is 70%, and the opening post discusses chemical measurement of the presence of scale.

Are you asking if there is a chemical test to determine the quantity of scale within the boiler?

Regards, Phil Corso

 

There are quite a number of things that can influence boiler performance, scaling being just one of them. I will try to list a couple:

1. Is the fuel coming in of the same calorific value as per design?

2. Is the feedwater inlet temperature as per design?

3. Is the combustion air temperature to the burners as per design? Are there any heat recovery heat exchangers on the combustion air path and are they functioning as per design?

4. Have you inspected the state of the boiler tubes, heat absorption surfaces from the gas side to see if there is soot buildup on them?

5. If the boiler employs finned tubes as heat absorption surfaces, are the spaces between the fins clean, and are the fins still in place?

6. Did you check air/exhaust gas temperatures all along your boiler and are they as per design?

A boiler which is only managing 70% of MCR has more things wrong than scaling.

 

> Are you asking if there is a chemical test to determine the quantity of scale within the boiler? <

yes , it is the same what i'm looking for

 

SCE... I suggest you compare conductivity of make-up water (post treatment) to boiler blow-down logs to approximate concentration of dissolved solids buildup.

By comparison can approximate specific impurity accumulations since last planned outage!

Phil Corso