×
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

Sizing oily water separators.

Sizing oily water separators.

Sizing oily water separators.

(OP)
We have two dikes with AST for fuel oil #2(One dike with two tanks, and another with three, 5000m3 each API 650 fixed cone roof AST), the instalation is quite old and just have a simple drainage system with a fixed oil trap.

We have dimensioned a separator considering a ten year return period rain. The plant operators have asked for a capacity of this rain plus the water and foam fire system demand at full capacity in the worst fire escenario. For us this is too big, but the operators want us to size following their criteria.

They don´t want to see that this implies a very big separator but we want to base the design on a rational basis, and we want to know what is the criteria to define the capacity to size the separator considering the fire system water demand, any help on this.


RE: Sizing oily water separators.

API 421 Design and Operation of Oil-Water Separators might help.  Available from www.api.org

RE: Sizing oily water separators.

It is very important to know the fuel oil you process(type & density) since it maters to seperate from water. Moreover, fuel oils are considred dry, so that they have high specific gravity i.e .95, otherwise it is diffcult to  seprate. However, the fire water & foam, will be used in case of fire they should not be counted in calculating the capacity of the seperartor design since in case of fire or rain(ten years cycle)(usually it is 5 years return in order to be considred in design) should drain away from the dikes to drainge channels then to the designated surface draiange area of the plant( faded away by means of nutural evaporation). Finally, since a separter is only paratical if you process a daily oily water with appreciable quantity of product to recover; therefore, you need to quantify the daily generated oily water before determining the seperator capacity.

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