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

Nylon 6 Extrusion - Caprolactam Waste

Nylon 6 Extrusion - Caprolactam Waste

(OP)
Hello all -

My plant runs five Nylon-6 extrusion lines, each fitted with a vacuum vent and liquid-ring vacuum pump using water as the seal fluid. During normal operation, we pull a large amount of caprolactam waste and other solid/liquid contaminants into the vacuum system. Despite two knockout pots before the pumps, this crud reaches the pumps and mixes with the seal water, which then must be disposed of as a hazardous waste.

Housekeeping is a real issue on these lines - seal fluid leaks are inevitable, capro-waste is the consistency of lard, and cleaning out knockout pots is not a clean job. We are also spending a big chunk of money each year on hazardous waste disposal. I'm looking into ways to reduce this waste stream or at least make handling and housekeeping a bit easier. Changing the seal fluid, redesigning of our knockout pots, redesigning our extruder vents, moving to dry-vacuum pumps, etc. My supervisor has been looking into fractional crystallization but I don't anticipate that being any cleaner than our existing knockouts.

A few vacuum system vendors have recommended against dry vacuum pumps as the process is just "too dirty," but I feel like there must be a way to clean up the process a bit. Any of you folks have any insight into a system like this?

Thanks!

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