×
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!
  • Students Click Here

*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

Jobs

What demister type to use

What demister type to use

What demister type to use

(OP)
We have a gas stream that contains sticky particles/droplets that we need to remove. In separating the particles we don't want to loose too much pressure.
Options we have considered are:
1. Demisters (chevron plate type): Currently this option looks like the best option at this stage, because it will be cost effective and easy to install (it could be installed in our vertical knockout drum), but I am not sure what  configuration to use.
2. Wire mesh demisters: The problem with these are that they could block very easily.
3. Cyclones:: This could work very well, but are very expensive. It could also have a high pressure drop.

Thank you very much!

RE: What demister type to use

Daniell:

You don't mention what the composition of the stream is or what the particles are made of, however one other thing to consider is spraying the mesh pad or plates with a solvent to wash the particles off of the pad or plate.  You could make it a continuous spray or spray only when the pressure drop got too high.       

RE: What demister type to use

(OP)
We are looking at an online cleaning system, but it is not going to be easy to install since the pressure in the knock out drum is about 2600 kPa. We also do not want to inject anything in the gas stream.

The gas consists of CO, CO2, H2 and CH4. The water inside the gas consists of some tars and oils at 35 °C.

What I want to know is what TYPE of demister to use.

Thank you very much!
Daniel

RE: What demister type to use

The gas composition looks similar to cokeoven gas from coke making process. Can you tell me what it actually is and the process. Is there naphthalene and BTX in the gas? Do you want to remove water as well as tar?
aberta

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