Thanks! I'd love to see a sketch. 5" seems pretty minimal; the riser inside the cyclone would probably be limited to 2-or-2-1/2", and the tangential entry about the same, but lots of light-phase, vacuum conveyance systems are built with 2-1/2" tubing and spiral PVC hose. Exhaust tube is fun to weld with either a little MIG or oxy-acetylene system. Good choice.
For some reason or other (it seems intentional) all of the high-efficiency cyclones I have worked with have been constructed with long, narrow-angled conical bottoms. The powder must be exposed to increasing centrifugal forces as it reaches the discharge zone, to keep it out of the exit airstream, I reason. But I'm certain that there's a point of diminishing return and KISS always applies! Mark From: [email protected] [mailto:[email protected]] On Behalf Of awesales Sent: Thursday, September 01, 2011 5:55 PM To: [email protected] Subject: Re: [Gasification] Gasification Digest, Vol 13, Issue 1 Hi Mark I built a cyclone for my gasifier it is made from a 5" truck exhaust pipe. It's heavy enough to disapate heat and welds very well. I entered with a 2" pipe and axhausted with a 2" pipe. The conventional wisdom is 2:1 ratio inlet pipe to dia.of the cyl.I have tried this unit a couple of times and it works well. I understand the "cone" bottom is not a great advantage. I have a simple drawing of it if you want one. [email protected] On Thu, Sep 1, 2011 at 12:00 PM, <[email protected]> wrote: Send Gasification mailing list submissions to [email protected] To subscribe or unsubscribe via the World Wide Web, visit http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenerg ylists.org or, via email, send a message with subject or body 'help' to [email protected] You can reach the person managing the list at [email protected] When replying, please edit your Subject line so it is more specific than "Re: Contents of Gasification digest..." Today's Topics: 1. Re: Charcoal Reduction Mill (Henri Naths) ---------------------------------------------------------------------- Message: 1 Date: Thu, 1 Sep 2011 10:37:49 -0600 From: Henri Naths <[email protected]> To: "[email protected]" <[email protected]>, Discussion of biomass pyrolysis and gasification <[email protected]> Subject: Re: [Gasification] Charcoal Reduction Mill Message-ID: <[email protected]> Content-Type: text/plain; charset="utf-8" Thanks Mark H Sent from my iPhone On Aug 27, 2011, at 2:12 PM, "Mark E. Ludlow" <[email protected]> wrote: > I?ll see what I can dig up. I did a project without a final baghouse and was amazed at how much the 1% loss of efficiency really amounted to! (it?s all super-fines). But getting the first 98-or-99% collected takes a huge load off the baghouse. A critical part of the cyclone is a long-ish downcomer that allow the material to accumulate and discharge with out disrupting the vortex dynamics. Learned by experience! Also, stacked Posiflate valves in lieu of a rotary airlock. > > > > Best, Mark > > > > From: Henri Naths [mailto:[email protected]] > Sent: Saturday, August 27, 2011 7:05 AM > To: [email protected]; Discussion of biomass pyrolysis and gasification > Subject: Re: [Gasification] Charcoal Reduction Mill > > > > Then, a tall skinny, cyclone > > > Hi mark > > I was wondering if you or some one on the list has the math for the efficiency ratios for cyclones ie. Tall skinny vrs short fat cfm, volume? Particulates? > > Thanks > > Henri > Sent from my iPhone > > > On Aug 25, 2011, at 10:14 PM, "Mark E. Ludlow" <[email protected]> wrote: > > Then, a tall skinny, cyclone > > _______________________________________________ > Gasification mailing list > > to Send a Message to the list, use the email address > [email protected] > > to UNSUBSCRIBE or Change your List Settings use the web page > http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenerg ylists.org > > for more Gasifiers, News and Information see our web site: > http://gasifiers.bioenergylists.org/ -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.bioenergylists.org/pipermail/gasification_lists.bioenergylists .org/attachments/20110901/3a8593de/attachment-0001.html> ------------------------------ _______________________________________________ Gasification mailing list to Send a Message to the list, use the email address [email protected] to UNSUBSCRIBE or Change your List Settings use the web page http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenerg ylists.org for more Gasifiers, News and Information see our web site: http://gasifiers.bioenergylists.org/ End of Gasification Digest, Vol 13, Issue 1 *******************************************
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