Contact US

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!

*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

BFW degaser operation

BFW degaser operation

BFW degaser operation

Please discuss the temperature of BFW inlet at a degaser.
In our Ammonia plant we are feeding DW at a temperature of 90 C, in the degaser. The degaser operates at 102-103 C. Please discuss if an increase of the inlet temperature at 93-95 C would cause any problems at the degaser's operation.
Best Regards,

RE: BFW degaser operation

 dear friend would you please mention which chemicals do you dose in degaser.


RE: BFW degaser operation

We are using an all organic BFW treatment. We are producing MP steam at a pressure of 45 Kg/cm2 and superheat it at 440 C.
The B.F.W includes:
-Addition of a three-amine mixture for the PH adjustment of our condensates
-Addition of a mixture of organic polymers for scale inhibition and surface passivation in conjuction with the addition of Sodium Phosphate.
- We also add an oxygen scavenger but this is at a later stage (exit of the the gegaser).

Hope that the information is clear enough,

RE: BFW degaser operation

In the Dagaser  it is convenient that some chemicals injected in the outlet line of degaser storage tank .
Please inform me which  chemicals are injected in the degaser and  Which  chemicals are injected in the outlet line?

RE: BFW degaser operation

All chemicals are fed at the exit of the degaser storage tank.
Some of them are fed at the suction of the B.F.W pump and some at the discharge,
I am sorry for not properly clarifying that at my previous post,
Best Regards,

RE: BFW degaser operation

The elevated DMW temperature will not help you as the total heat balance is on the stripping steam side.Moreover this increase your degasifier pressure and results higher steam loss

RE: BFW degaser operation

Dear friend,
I do not clearly see what you mean by saying that the total heat balance is on the stripping steam side ?
Plus why should there be an increase at the degasifier's pressure ?
You do not add a fixed amount of steam but as much steam as it is needed to achieve a certain pressure (and thus temperature).
The fact of the matter is that the overall heat balance was improved contrary to what you state.
Best Regards,

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! Already a Member? Login


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close