×
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

Burning Liquid Fuels In CFB (Circulating Fluid Bed)

Burning Liquid Fuels In CFB (Circulating Fluid Bed)

Burning Liquid Fuels In CFB (Circulating Fluid Bed)

(OP)
I am researching the suitability of burning liquid fuels in a CFB combustor. Our clinet has process waste from a coke plant that they would like to utilise for inceneration and power generation. This is char plant tar, liquor (97% water) and off-gas. Coal will be added at times to boost output.

Info from the 20th International Conference on CFB indicate that this (burning liquids in CFB's) has up to date only been done on lab and pilot scale, and the suitability for large scale projects are questionable and not proven....

Does anybody know if that have been done somewhere?

Regards

RE: Burning Liquid Fuels In CFB (Circulating Fluid Bed)

Paper Mill sludge has been burned in CFB boilers successfully for years now, but that is a fairly thick fluid, if it can be classed as a fluid at all.  Is there any way to concentrate your fuel stream to make it more suitable for this type of combustion process?

rmw

RE: Burning Liquid Fuels In CFB (Circulating Fluid Bed)

(OP)
Well, the tar is 70% naphtalene, 10% gasolene and 10% carbon (by wieght) so not much to do about it. except if we mix it with coal beforehand and add it as a wet solid or sludge...hmmm.....

The liquor is basicly contaminated water that needs to be incinerated. But this have very little suplur so I guess it could be sprayed into the combustion chamber without getting in contact with the sorbent...

problem is the boiler contractor we are working with are not willing to quote on something they havn't done before
sad

I think doing this might be possible but will probably require some sort of lab testing first...

Regards
Eric
 

RE: Burning Liquid Fuels In CFB (Circulating Fluid Bed)

wastewater sludge has been successfully burned in bubbling bed combustors, but in general they are limited in size to less than 300 MWth input. As I recall, the fuel must be less than 50% water  by wt.

It may be worth directly contacting a CFB supplier ( Metso, Alstom, FW Oy) to get their opinion- maybe the liquid fuel could be introduced in the fines recycle stream ( cyclone drains loop back to main combustor)?

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