2025 - Sustainable Industrial Processing Summit
SIPS2025 Volume 10. Intl. Symp on Energy, Carbon, Battery, Biochar and Agroforestry
| Editors: | F. Kongoli, S.M. Atnaw, H. Dodds, T. Turna, J. Antrekowitsch, G. Hanke, K. Aifantis, Z. Bakenov, C. Capiglia, V. Kumar, A.U.H. Qurashi, A. Tressaud, R. Yazami, M. Giorcelli |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2025 |
| Pages: | 316 pages |
| ISBN: | 978-1-998384-56-3 (CD) |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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A NEW AND EFFICIENT NATURAL DRAFT MIXING/BURNING TECHNIQUE FOR PYROLYSIS GAS
Gerard Harris1;1APROVECHO, Santa Rosa, United States;
Type of Paper: Regular
Id Paper: 221
Topic: 9
Abstract:
The process of pyrolysis to produce biochar also produces pyrolysis gasses that need to be delt with. Burning the gasses is one option. A burner which can burn these gasses at near 100% efficiency without needing electronics, fans, or electrical power, but is totally natural draft would be of benefit in many situations.
This paper describes such a burner, highly efficient, natural draft, inexpensive, and easy to use.
This burning technique was designed over 10 years of experiments. Most of these experiments could be defined as back yard experimenting. Promising designs were tested under the testing hood at Aprovecho Woodstove Research Center in Cottage Grove, Oregon. One early design was tested at Lawrence Berkley National Labs Burn Lab on the UC Berkley campus about 7 years ago. It tested at nearly 100% efficiency using a TLUD type pyrolysis gas generator. Newer models are more capable, reaching very high-power levels with very high burning efficiency. Placing such a burner atop a biochar kiln would efficiently burn the produced pyrolysis gas, without expensive sensors, electronics, or power supplies.
The process uses the Venturi effect and so could be classified as a Venturi mixer/burner. It uses the Venturi effect to lower the pressure of the gas, increasing the pressure gradient with the atmospheric air, and so increasing the force pushing the air into the gas. It also increases the surface area between the air and gas and reduces the depth the air must penetrate into the gas, both of which speed mixing and burning. It automatically adjusts the secondary air to match the amount of pyrolysis gas, keeping the burn efficient at all power levels.
Using burners of this type on biochar kilns could reduce polluting combustion emissions where processing the gas into useful products is not possible.
No published works. The staff at Aprovecho WSRC are familiar with me. I have presented at ETHOS wood stove conference on this topic, and displayed the burners there, so they are familiar with me.