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!

*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.

Jobs

Aluminum Chlorohydrate scaling up feed lines.

Aluminum Chlorohydrate scaling up feed lines.

(OP)
We feed ACH as our coagulant and it seems to be scaling up our feed lines. The substance is hard, brittle, flaky red substance, has anyone else had this problem?

RE: Aluminum Chlorohydrate scaling up feed lines.

A couple of questions to clarify the problem.

Is this a new problem?
Have you changed chemicals or has there been a major change in water quality or source?
Is the red substance water soluble, acid soluble or neither?
Are you treating drinking water or something else?
Are you feeding the ACH with another chemical?
Can you feed the ACH directly into the dose point rather than using a carry water system?

Regards
Ashtree
"Any water can be made potable if you filter it through enough money"

RE: Aluminum Chlorohydrate scaling up feed lines.

(OP)
It has recently become a problem with clogging the lines. There is no feed water mixed with ACH from tank to injection point or any other chemical. It is pumped directly from the bulk tank with a peristaltic pump to the injection point. We changed from Ferric Sulfate to ACH about 5 years ago. The substance dissolves in water and has yellowish tint, heated sulfuric acid which creates a white milky substance but does not dissolve in room temperature acid. When the material is fresh from the line it has a clay like consistency but dried becomes porous sort of like a sand dollar. We have a limited budget so sending the substance off to a lab for analysis is not an option.

RE: Aluminum Chlorohydrate scaling up feed lines.

What form are you getting your ACH?
Is it a powder , liquid or some sort of proprietary blend?

Regards
Ashtree
"Any water can be made potable if you filter it through enough money"

RE: Aluminum Chlorohydrate scaling up feed lines.

The chemicals should be fed using a conveying water. If you add the conveying water and maintain a fluid velocity of approximately 2-5 ft/sec, you should not have a problem. Many users convey a 5% chemical solution.

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


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