×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

PH OF FEED WATER COMES DOWN IN STEAM DRUM

PH OF FEED WATER COMES DOWN IN STEAM DRUM

PH OF FEED WATER COMES DOWN IN STEAM DRUM

(OP)
Dear All
I want to know that why after dozing ammonia or morphiline at upstream of deaerator we doze trisodium phosphate in steam drum to increase PH . Whether PH of water comes down when water reaches boiler then how PH reduces?
Regards
Pradeep

RE: PH OF FEED WATER COMES DOWN IN STEAM DRUM

Hi Pradeep,

Why do we dose hydrazine / sodium sulphite at de-aerator upstream?
Its oxygen scavenger from the boiler feed water.

Why do we dose morpholine at de-aerator upstream?
It removes carbon dioxide from the boiler feed water.

Why do we dose sodium tri-phosphate in the steam drum?
There are some salts like calcium carbonate that have inverse solubility, i.e. they get deposited as the temperature goes up. Na3PO4 reacts with them to form salts which do not have inverse solubility. These are removed thru continuous and intermittent blowdowns, etc. etc.

Happy reading.

DHURJATI SEN

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources