Author Topic: Coalescers  (Read 3259 times)

Offline Bio-boy

  • Impeller jammer
  • ***
  • Posts: 197
  • Location: Wirral
Coalescers
« on: July 28, 2015, 09:35:54 AM »
Does anyone use a Coalescer to aid drying and water removal?

Offline dgs

  • Wiki Editor
  • Grand Gunge Master
  • ******
  • Posts: 1345
  • Location: york
Re: Coalescers
« Reply #1 on: July 28, 2015, 10:13:57 AM »
What actual substance would you be thinking about to coalesce the water and biodiesel?
FOC water tests by Sandy brae or Karl Fischer for forum members.

Offline Bio-boy

  • Impeller jammer
  • ***
  • Posts: 197
  • Location: Wirral
Re: Coalescers
« Reply #2 on: July 28, 2015, 12:28:52 PM »
Water removal from the washed biodiesel.

Offline Bio-boy

  • Impeller jammer
  • ***
  • Posts: 197
  • Location: Wirral
Re: Coalescers
« Reply #3 on: July 28, 2015, 12:30:00 PM »
Water removal from the washed biodiesel. Found a site stating that it is possible to reduce water content of oil down to 10PPM.

Offline dgs

  • Wiki Editor
  • Grand Gunge Master
  • ******
  • Posts: 1345
  • Location: york
Re: Coalescers
« Reply #4 on: July 28, 2015, 01:48:25 PM »
Water removal from the washed biodiesel. Found a site stating that it is possible to reduce water content of oil down to 10PPM.

I'm sure it is but for purposes of our process the water doesn't have to be that low. From testing I have found the average water content of well settled oil is around the 850ppm region. After glycerol pre-treating this reduces to around the 350ppm mark. This is more than good enough for our process.

Well washed biodiesel will be around the 1200ppm level just after the last wash, and will reduce to @ 1000ppm over the next day or two if just left to stand (depending on temperature)
In winter with cold nights some dissolved water in the bio turns into suspended water and will drop overnight, then if the temperature rises considerably during the day (as it can do with high pressure dominating) the bio may actually get to the point where it clears (suspended water goes back to being dissolved) even if it clears the water level will still be around the 1000ppm level.

This effect is noticeable with the bio layer on a 50/50 test. Depending where the jar is stood the bio will mist as the temperature falls and clear as the temperature rises.
« Last Edit: July 28, 2015, 01:52:00 PM by dgs »
FOC water tests by Sandy brae or Karl Fischer for forum members.

Offline Julian

  • Administrator
  • Oil baron
  • *******
  • Posts: 6390
    • Used Cooking Oil Collection website
  • Location: East Surrey, UK.
Re: Coalescers
« Reply #5 on: July 28, 2015, 05:26:46 PM »
Interesting Bio-boy ... have you got a link to this site or a description of the product?

I looked at coalescing filters a while back, but they seemed to work only on free water.
Used Cooking Oil Collection website ... http://www.surreyusedcookingoilcollection.palmergroup.co.uk

Offline Bio-boy

  • Impeller jammer
  • ***
  • Posts: 197
  • Location: Wirral
Re: Coalescers
« Reply #6 on: July 28, 2015, 06:10:10 PM »
Interesting Bio-boy ... have you got a link to this site or a description of the product?

I looked at coalescing filters a while back, but they seemed to work only on free water.

http://www.fandsuk.com/#/coalescers-separators/4564238871

Offline Bio-boy

  • Impeller jammer
  • ***
  • Posts: 197
  • Location: Wirral
Re: Coalescers
« Reply #7 on: July 28, 2015, 06:12:04 PM »
Interesting Bio-boy ... have you got a link to this site or a description of the product?

I looked at coalescing filters a while back, but they seemed to work only on free water.

http://www.fandsuk.com/#/coalescers-separators/4564238871

http://www.oilybits.com/fuel-purifiers/oilybits-fuel-purifiers.html

Models 800 up could be used in a processor set-up.

Offline dgs

  • Wiki Editor
  • Grand Gunge Master
  • ******
  • Posts: 1345
  • Location: york
Re: Coalescers
« Reply #8 on: July 28, 2015, 07:38:36 PM »
As the description suggests, it will only separate liquids that are immiscible. Anything dissolved (miscible) will stay there, just like a centrifuge.
FOC water tests by Sandy brae or Karl Fischer for forum members.