Economizer installations

[Imak]

Would like to hear opinons on what is the most common scenario when installing Boiler Feed Water Economizers:

A: Deaerator-->Eco-->Boiler
B: Degasifier-->Eco-->DA-->Boiler

Thanks in advance.

I_mak

 

[rmw]

In the industrial areas that I work in, "A" is by far the most common.

Others may have different experience.

rmw

 

[Imak]

Thanks Rmw for your reply.

My experience is the same, i.e. more "A" cases rather than "B".

Btw, can you recall what heat recovery was in those cases?
I am doing a utilities system efficiency check where Eco giving 20-23deg.C heat recovery and flue gases leaving the stack stay ~170-190 deg.C. To me heat exchange is too low and stack temp it too high!

That's why I led me to think that in my particular case, scenario "B" would give a better duty.

Thought?

Thanks.

I_mak