See MembersPage/MarcellGal/GasProducer for generic information about different types of (air-oxydant) gas producers.
This is a combined draft gasifier with adjustable ejector for internal tar-recycling, designed for 5-14 kg/hour woodchips and 25-500 mg/Nm3 tar (less than Imbert, and much less than FEMA) when warmed up. 1.5kg dry fuel / 1kWh expected with 2m2 heat exchanger. (not likely to reach 1.4kg/kWh in such small size). In other words, 3-10kWe + similar thermal output.
Nice blue flames (cyclone + some cooling, but no filtering).
Short [video intro]
Other fuel: grinded straw or similar relatively dry carbonaceous feed not much more than 40% moisture dry-base) (and top closed, of course).
- char-maker (large torrefaction+pyrolisys zone)
The small nipples are for pressure and temperature measurement.
The ejector can be seen:
Pictures are taken without heat insulation (very important, but hard to see details with insulation on).
The big tube is sized for max 300 kg/hour / m2 and the throat for 1100kg/hour/m2. Considering earlier experience (own and others').
Note that with this sizing it's unsuitable (or highly suboptimal) for saw-dust or rice-husks. According to [husk-and-straw-properties article]
- 0.1m/s airflow causes 2cm (200 Pa) pressure drop per 1 meter of rice-husk bed.
- 0.2m/s airflow causes 3cm (300 Pa) pressure drop per 50cm of rice-husk bed
- would be 42m3/hour with this d=273mm tube
- much better with woodchips or corn stalks