Micro-gasification: Cooking with gas from biomass - Amper

Micro-gasification: Cooking with gas from dry biomass
Table of content Module 3
3.1 Solid biomass suitable as fuel in a micro-gasifier ............................................... 70
3.2 Factors influencing fuel properties ...................................................................... 72
3.2.1 Moisture content........................................................................................... 72
3.2.2 Particle size and particle size distribution ..................................................... 73
3.2.3 Fuel density and Bulk density ...................................................................... 75
3.3 Feedstock ready to use without major processing .............................................. 77
3.4 Fuel processing techniques ................................................................................ 79
3.4.1 Drying ........................................................................................................... 80
3.4.2 Sizing ........................................................................................................... 80
3.4.3 Densification ................................................................................................ 81
I) Manual briquetting options (wet pulp, low pressure) ...................................... 84
a) Hand shaped briquettes ............................................................................. 84
b) Briquette shaped with a simple mould from a perforated bottle ................. 84
II) Lever-presses (wet pulp, low-moderate pressure) ....................................... 85
a) Paper-brick Maker ..................................................................................... 85
b) Wooden presses by Leland Hite ................................................................ 85
c) Wooden presses by Richard Stanley and the Legacy Foundation ............. 87
III) Briquetting options: medium pressure, moist-dry feedstock ......................... 88
a) Screw-type extruder presses ..................................................................... 88
b) Piston presses ........................................................................................... 89
IV) Pelletising Options ....................................................................................... 90
a) Flat-die presses ......................................................................................... 90
b) Ring-die presses ........................................................................................ 91
Summary of benefits of densified fuel for use in micro-gasifiers ........................ 92
HERA – GIZ Manual Micro-gasification Version 1.01 January 2011
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