- Dec 26, 2017 -
Different biomass reaction process is also different, the common gasifier reaction can be divided into oxide layer, reduction layer, cracking layer and drying layer.
1, oxidation reaction
The main reaction of biomass in the oxide layer is oxidation reaction. The gasification agent is introduced from the lower part of the grate. After absorbing heat from the ash layer, it enters the oxide layer, where it undergoes combustion reaction through high temperature carbon to generate a large amount of carbon dioxide. Meanwhile, Release heat, the temperature up to 1000 ~ 1300 degrees Celsius,
The combustion in the oxide layer is an exothermic reaction, this part of the reaction heat for the reduction of the reduction reaction, the material of the grin and drying provides a heat source.
2, the reduction reaction. The carbon dioxide and carbon generated in the oxide layer undergo a reduction reaction with water vapor.
3, cleavage reaction zone. In the ascending process, the hot gas generated in the oxidation zone and the reduction zone is heated in the pyrolysis zone to heat the biomass so that the biomass in the pyrolysis zone undergoes a cracking reaction.
4, drying area. The gas product of the oxidation layer, the reduction layer and the pyrolysis reaction zone rises to the zone, heats the biomass raw material, evaporates the moisture in the raw material, absorbs the heat, and reduces the production temperature. The outlet temperature of the biomass gasification furnace is generally 100 ~ 300 ° C
The oxidation zone and the reduction zone are collectively referred to as the gasification zone, and the gasification reaction is mainly carried out here. The pyrolysis zone and the drying zone are collectively referred to as fuel preparation.