[Stoves] Clinker Formation
Crispin Pemberton-Pigott
crispinpigott at outlook.com
Sun May 18 04:48:24 CDT 2014
Otto that straw pellet test will be important because it may have all its Cl and K in it so the melting temp will be lowered.
If processed agri-wastes are to be an important fuel they will have to be accommodated by the designer.
Regards
Crispin
BBM 2B567C3
From: Otto Formo
Sent: Sunday, May 18, 2014 16:39
To: Stoves Bioenergylist
Reply To: Discussion of biomass cooking stoves
Subject: Re: [Stoves] Clinker Formation
Dean Still,
According to Crispin and to our experience, the flames reaching the cooler pot, instantly create char or black carbon - insufficient combustion create more PM and black carbon........!?
The fan driven Oorja, was tested here with woodpellets, four years ago.
At full blast the "room" was soon covered in a thin layer of soot and ash.
The cast iron combustion "chamber" was glowing instantly- around 1000 - 1100 C.
What about ultra fine particles......??
Natural Draft gasifiers, are the way forward................
We will soon test the Peko Pe with staw pellets and see the effects of clinker formation.
Using Corn colbs (agri-waste) as fuel, we noticed a temperature of 450 - 550 C at the top of the flame and around 350 -400 C at the pyrolysis front.
At the end of the burn, when most gases are utillized and the char starts glowing, we can raech the temperature arond 900 - 1000 C.
To avoid clinker formation, we just removed the char , before it starts glowing, namely biochar.......problem solved?
Otto
Date: Sat, 17 May 2014 17:25:27 -0700
From: deankstill at gmail.com
To: stoves at lists.bioenergylists.org
Subject: Re: [Stoves] Clinker Formation
Hi Tom,
Does cooling the burn reduce black carbon? Are ultra fine particles more of a problem in forced air stoves?
Best,
Dean
On Sat, May 17, 2014 at 3:36 PM, Tom Miles Easystreet <tmiles at trmiles.com> wrote:
Think of flue gas recirculation as a way of trimming excess air at the same burn rate while cooling the flame. The Kob boiler is nicely rigged for it.
Tom
T R Miles Technical Consultants Inc. tmiles at trmiles.comSent from mobile.
On May 17, 2014, at 9:00 AM, Crispin Pemberton-Pigott <crispinpigott at outlook.com> wrote:
How is it used to lower the temperature? By interfering with the O2 supply thus reducing the burn rate? Or the efficiency of combustion?
Thanks Crispin
On Fri, 16 May 2014 07:59:49 -0700,"Tom Miles" <tmiles at trmiles.com>
wrote:
>
>Stages combustion in a pellet burner can be a challenge. Most pellet burners are designed to burn the fuel and air mixture at the highest temperature which is usually in the range of 1000C- 1100C range which will melt most dirty fuels.
Does anyone use exhaust gas re circulation to lower the bed
temperature burning pellets?
We had this on the Kob boilers which burned shredded furniture waste,
but generally did not need it with G30 woodchip on the adjacent
boiler.
AJH
_______________________________________________
Stoves mailing list
to Send a Message to the list, use the email address
stoves at lists.bioenergylists.org
to UNSUBSCRIBE or Change your List Settings use the web page
http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org
for more Biomass Cooking Stoves, News and Information see our web site:
http://stoves.bioenergylists.org/
_______________________________________________
Stoves mailing list
to Send a Message to the list, use the email address
stoves at lists.bioenergylists.org
to UNSUBSCRIBE or Change your List Settings use the web page
http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org
for more Biomass Cooking Stoves, News and Information see our web site:
http://stoves.bioenergylists.org/
_______________________________________________
Stoves mailing list
to Send a Message to the list, use the email address
stoves at lists.bioenergylists.org
to UNSUBSCRIBE or Change your List Settings use the web page
http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org
for more Biomass Cooking Stoves, News and Information see our web site:
http://stoves.bioenergylists.org/
_______________________________________________
Stoves mailing list
to Send a Message to the list, use the email address
stoves at lists.bioenergylists.org
to UNSUBSCRIBE or Change your List Settings use the web page
http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org
for more Biomass Cooking Stoves, News and Information see our web site:
http://stoves.bioenergylists.org/
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.bioenergylists.org/pipermail/stoves_lists.bioenergylists.org/attachments/20140518/2a326bd8/attachment.html>
-------------- next part --------------
_______________________________________________
Stoves mailing list
to Send a Message to the list, use the email address
stoves at lists.bioenergylists.org
to UNSUBSCRIBE or Change your List Settings use the web page
http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org
for more Biomass Cooking Stoves, News and Information see our web site:
http://stoves.bioenergylists.org/
More information about the Stoves
mailing list