×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

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

Can I alter a pump operating point?

Can I alter a pump operating point?

Can I alter a pump operating point?

(OP)
I'm involved in a project at a Wastewater Treatment Plant that involves relocating a gas chlorine feed system. It originally shared a building with the plant's MCC, but due to issues it needs to be separated and reside in its own building. The plant utilizes water from the chlorine contact tank for use throughout the different processes such as yard water, water for the clarifiers, and also for pressure supply to deliver the required amount of gas chlorine to the chlorine mixer. A portion of water is pumped out of the chlorine contact tank and throughout the plant. I was visiting the plant earlier this week and noticed that a pressure gauge on the hydropneumatic tank located just outside the chlorine room read 30 psi. I've also noted that the chlorine injector nozzle requiring the least amount of supply pressure for the backpressure and feed rate calculated is 35 psi. My question is this: Is it even possible to change the settings on the hydropneumatic tank (which control the start and stop of the pumps in the chlorine contact tank) to start pumps at a minimum of 35 psi and stop pumps at, say 40 psi? This is not how the system is operating and I suspect that the system head curve is currently intersecting the pump curve at approximately 30 psi (69 ft). 35 psi and 40 psi do fall well within the pump curve and even closer to the BOP. I'd prefer to do this rather than purchase a separate booster for the chlorine gas system. Thank you for reading this and entertaining my question.

RE: Can I alter a pump operating point?

Can you share a system diagram for the pump detail?
How the line pressure of 30psi can be used for the injector nozzle to be operated at 35psi?

RE: Can I alter a pump operating point?

I see no reason why you can't do this. You just have to look at the pump curve to determine if it is feasble.

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


Resources

Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

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