[Stoves] TLUD dimensions on concentrator holes and chimneys

[Gordon West]

Here is a very interesting image of a large TLUD “stove” that Bill Knauss made years ago, pyrolyzing pecan shells. It is a 55 gallon drum with small computer fans providing both primary and secondary air. It has a stainless steel combustion chamber that also serves as concentrator ring. Secondary air is introduced though the 12mm holes. The cool thing is you can see the syngas below. The photo is in bright sunlight so you cannot see any flames, and there is no smoke. I posted another image of this about a week ago taken in the shade and the thin flames were blue/purple. I neglected to catch the flame temperature but I think it’s around 800C.
 
Gordon West
The Trollworks
503 N. “E” Street
Silver City, NM 88061
575-537-3689

An entrepreneur sees problems as the seeds of opportunity.






> On Mar 28, 2019, at 7:52 AM, Anderson, Paul <psanders at ilstu.edu> wrote:
> 
> Stovers,
>  
> Here are several messages from an non-list discussion about TLUD concentrator holes.   Read the last (bottom) messages first if you  want the sequence of the discussion.
>  
> I hope that all discussions of this nature can be on the Stoves Listserv (which is quite quiet for a while).
>  
> Paul
>  
> Doc / Dr TLUD / Paul S. Anderson, PhD
> Exec. Dir. of Juntos Energy Solutions NFP
> Email:  psanders at ilstu.edu <mailto:psanders at ilstu.edu>       Skype:   paultlud
> Phone:  Office: 309-452-7072    Mobile: 309-531-4434
> Website:   www.drtlud.com <http://www.drtlud.com/>
>  
>  
> Doc / Dr TLUD / Paul S. Anderson, PhD
> Exec. Dir. of Juntos Energy Solutions NFP
> Email:  psanders at ilstu.edu <mailto:psanders at ilstu.edu>       Skype:   paultlud
> Phone:  Office: 309-452-7072    Mobile: 309-531-4434
> Website:   www.drtlud.com <http://www.drtlud.com/>
>  
> From: Anderson, Paul 
> Sent: Thursday, March 28, 2019 8:26 AM
> To: 'Norman Baker' <ntbakerphd at gmail.com <mailto:ntbakerphd at gmail.com>>
> 
>  
>  
> From: Norman Baker <ntbakerphd at gmail.com <mailto:ntbakerphd at gmail.com>> 
> Sent: Thursday, March 28, 2019 12:40 AM
> 
>  
> Paul;
> 
> I assume you mean the diameter of the stack or combustor? 
>  
> [PSA>>] of the concentrator lid.     6 inch diameter fuel chamber with 3 inch diameter hole in the lid.
>  
> In prior tests with concentrator rings, a hole that has a diameter of 70% of the stack seem to be adequate.
> [PSA>>] I agree with that, but it is a different question than the hole of the concentrator.   I do not like a chimney to be the same diameter as the hole in the concentrator.
>  
> Lately, I have been going to about an 80% diameter.  
>  
> In one publication I read the stack diameter should be at least 60% of the feedstock barrel diameter.
> [PSA>>] That is a third question, and your response below sounds correct.
> Paul
>  
> Otherwise the time needed for gases to exit the combustor became too fast and hence too short for complete combustion. Is this your experience? And how about the rest of you chiming in on this.
>  
> Norm
>  
> On Wed, Mar 27, 2019 at 8:05 PM Anderson, Paul <psanders at ilstu.edu <mailto:psanders at ilstu.edu>> wrote:
> Norm,
>  
> In general, the diameter of the hole is about half of the diameter.   But there might not be any visible (noticeable) impact if reduced or enlarge 10 to 20% of the size of the  hole.  Trial and error are your best bets to get this refined.   
>  
> I look forward to hearing of your results.
>  
> Paul
>  
> Doc / Dr TLUD / Paul S. Anderson, PhD
> Exec. Dir. of Juntos Energy Solutions NFP
> Email:  psanders at ilstu.edu <mailto:psanders at ilstu.edu>       Skype:   paultlud
> Phone:  Office: 309-452-7072    Mobile: 309-531-4434
> Website:   www.drtlud.com <http://www.drtlud.com/>
>  
> From: Norman Baker <ntbakerphd at gmail.com <mailto:ntbakerphd at gmail.com>> 
> Sent: Wednesday, March 27, 2019 7:24 PM
> 
> Paul and everyone;
> 
> You are the one who is most familiar with concentrator rings and you suggested one for my large TLUD. Frankly, I've never been too terribly impressed with concentrator rings until I saw one in action at the TLUD Summit. I am planning on adapting one to my large TLUD. Are there guidelines or specifications for them? Should they be an area percentage of the stack or should they be in the area percentage of the feedstock barrel?
> 
> Norm
>  
>  
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