Abstract
In order to decide the design criteria required in the basic design of an indirect thermal decomposition furnace, which is constructionally one of principal equipments of a bio-gas and charcoal with a compressed biomass feeder, the basic researches on the indirect thermal decomposition of compressed biomass, from which a large amount of coexisting air was put out, were carried out. The summary of results is shown below.
(1) The proper compressive load ps exerted on biomass is about 5.6MPa{57kgf/cm2} for both husk and sawdust.
(2) Calorific values per unit volume of generated gases were the largest in region of 800-900°C, that is, 13.3MJ{3200kcal}/m3 (Husk) and 13.7MJ{3300kcal}/m3 (Sawdust).
(3) The rough standard times required for the thermal decomposition of both biomass are 14-15 minutes at 700°C and 12-13 minutes at 900°C.
