Feed water pretreatment for steam generation - help me with my unknown unkowns 1

[MartinLe]

We are working on a project were steam is generated from CHP exhaust heat. I'm talking to potential suppliers of the feedwater pretreatment.

What I know:
amount of steam generated (lost steam)

What I don't know:
exact water quality, I assume drinking water
local regulations regarding safety measures

What else don't I know that has to be taken into consideration?

 

[davefitz]

read the book "steam " 41st edition , by B+W,chapter 42. Table 1 provides guidelines on required feedwater quality vs boiler operating pressure , or refer tothe ABMA guidelines or the iapws guidelines.

If it is a small unit, then you ar not likely able to justify hiring a plant chemist, so a packaged RO/EDI unit may be used.

"Whom the gods would destroy, they first make mad "

 

[MartinLe]

Thanks. I actually got a vendor who also supplies the water treatment - one interface headache less.

 

[FredRosse]

If you are generating steam at relatively low pressures, boiler water may be allowed far above feedwater TDS quality of city potable water. You may not need pre-treatment, but the vendor of water treatment equipment is probably not going to mention this option.