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Thread: Active carbon filter for roaster

  1. #1
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    Active carbon filter for roaster

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    Has any one used an active carbon filter for smoke & odour as an after burner can cost as much as a roaster?

  2. #2
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    Re: Active carbon filter for roaster


    Quote Originally Posted by 313630232129273031420 link=1282127521/0#0 date=1282127521
    Has any one used an active carbon filter for smoke & odour as an after burner can cost as much as a roaster?
    Yes, and they dont work.

    I invested $2.5k finding out and you got it for free with your first post on CS.

    Welcome to CS and repay my information by going out and doing something nice for someone else.

    You can call me on 0404 049 812 if you have any other questions about it.

  3. #3
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    Re: Active carbon filter for roaster

    so what is a cost effective solution (not half a jet engine ) .have you tried a water scrubber or a catalytic combustor similarlily used in american wood fired stoves?

  4. #4
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    Re: Active carbon filter for roaster

    Electrostatic seems like a good option combined with some other filtration. What size roaster are you looking at?

    http://en.wikipedia.org/wiki/Electrostatic_precipitator

  5. #5
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    Re: Active carbon filter for roaster

    Quote Originally Posted by 33343221232B253233400 link=1282127521/2#2 date=1282137167
    so what is a cost effective solution
    Quote Originally Posted by 2225212E262C39292E27400 link=1282127521/3#3 date=1282138760
    What size roaster are you looking at?
    A critical question.

    If you dont want to call me, call Mark from Coffee Roasters Australia.


    Quote Originally Posted by 2225212E262C39292E27400 link=1282127521/3#3 date=1282138760
    Electrostatic seems like a good option
    May be a good option but a very expensive one!




  6. #6
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    Re: Active carbon filter for roaster

    Quote Originally Posted by 2432373726242821212222470 link=1282127521/4#4 date=1282167047
    expensive one
    Expensive to buy from what I have found but compared to afterburners cheaper to run. Should be quieter too ;)

  7. #7
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    Re: Active carbon filter for roaster

    There was an interesting acoustic carbon filter system that won the ABC New Inventors last night.

    It was designed to trap carbon from diesel engines, using sound to clump the very fine carbon particles to allow easier filtering.

    Maybe there could be a future use for coffee roasters.

    Barry

  8. #8
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    Re: Active carbon filter for roaster

    I found this aftermarket catalytic combuster that might do the job in particular if it was fitted at the chaff collector exit. I have attached the link.
    http://www.woodmanspartsplus.com/4850/20455/Replacement-Catalytic-Combusters/Catalytic-Add--On-Stove-Damper.html

  9. #9
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    Re: Active carbon filter for roaster

    Quote Originally Posted by 62656370727A746362110 link=1282127521/7#7 date=1282309676
    I found this aftermarket catalytic combuster that might do the job in particular if it was fitted at the chaff collector exit. I have attached the link.
    http://www.woodmanspartsplus.com/4850/20455/Replacement-Catalytic-Combusters/Catalytic-Add--On-Stove-Damper.html
    Yes, following some discussions with the OT and my initial research into catalytic converters make me think these might be a suitable and cost effective option.

    The two issues I see at this point are that:
    a) catalytic converters need a certain amount of heat to trigger the reaction, which could I think be overcome with the addition of a PID and electric element, and,
    b) they may cause restriction to the airflow.

    At this point Im really curious, researching furiously, and willing to invest some money in the idea!


  10. #10
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    Re: Active carbon filter for roaster

    Some info here on Catalytic converters and a non flame process from Probat Burns toward the end of the doc also some info on running costs comparisons http://www.ncausa.org/files/public/M...e_Roasting.pdf

    Water curtain and scrubber unit with pics http://www.coffeed.com/viewtopic.php?f=16&t=2293

  11. #11
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    Re: Active carbon filter for roaster

    pid and electric element sounds like the go, 200deg c will do it which 392 deg f

  12. #12
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    Re: Active carbon filter for roaster

    Bump sort of.

    I have been looking a bit more seriously into commercial catalytic converters with a few extras at $11-12k USD compared to a similar size afterburner at $7k USD but with a huge saving in gas or electricity (both options available for the Cat). The system I have been looking at allows the recirculation of the scrubbed heated air back into the roaster to reduce heating costs further.

    So looks like the days of the small afterburners if required might be numbered?

  13. #13
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    Re: Active carbon filter for roaster

    Quote Originally Posted by 34333738303A2F3F3831560 link=1282127521/11#11 date=1289026777
    So looks like the days of the small afterburners if required might be numbered?
    Nope.

    Nothing, I repeat...nothing, will work as effectively or efficiently as an afterburner.

  14. #14
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    Re: Active carbon filter for roaster

    Quote Originally Posted by 0315101001030F06060505600 link=1282127522/12#12 date=1289029386
    Nothing, I repeat...nothing, will work as effectively or efficiently as an afterburner.
    I gather that is purely on a clean point of view and not on a running cost basis? Interested on what info you have on this.

    On a smaller example a reduction of about 70%+ of the gas usage was put up over using an afterburner.

    As the cost of gas and energy generally rises costs may win out over any slight disadvantage (havent seen any figures on exhaust quality of one to another) with not using an afterburner.

  15. #15
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    Electrostatic Precipitator for smoke and odour control

    Quote Originally Posted by beanflying View Post
    Electrostatic seems like a good option combined with some other filtration. What size roaster are you looking at?

    http://en.wikipedia.org/wiki/Electrostatic_precipitator

    This thread seems to have gone nowhere, but looking at pricing and sizes, it appears to me that an electrostatic precipitator with an ozone final stage would be the best solution for a small roaster. Has anyone used one, and if so, what are the pros and cons?

  16. #16
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    hey guys, activated carbon is great at absorbing odour causing molecules, but it does actually burn with enough heat.
    I used to use actived carbon to mop up any extra ozone from cleaning up smelly air - till I met a Frenchman with black dots embedded in his face. The black dots were tiny lumps of activated carbon from a filter that caught fire and exploded. He was luck to survive the explosion but lives covered in black dots.
    What out using activated carbon in hot air applications.

  17. #17
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    Behmor Coffee Roaster
    Has anyone considered a wet scrubber? These are cheap and cheery and can knock down a lot of odour and fine powders...much cheaper than an ESP
    Dimal likes this.



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