Carbonization method

Abstract

Provided is a carbonization method which allows efficient carbonization treatment of high moisture content biomass by dry distillation without having to substantially upgrade already existing carbonization devices. In this carbonization method, the following three steps are performed continuously for a fixed period of time: a first step in which a distillation gas and a carbonized fuel derived from low moisture content biomass are obtained by thermal decomposition of low moisture content biomass in a carbonization furnace, a second step in which dry biomass is obtained by drying high moisture content biomass in a dryer by means of the high-temperature gas obtained by secondary combustion of the dry-distilled gas obtained in the first step, and a third step in which the dry biomass obtained in the second step is stored; thereafter, the following three steps are performed continuously for a fixed period of time: a fourth step in which the dry-distilled gas and a carbonized fuel derived from high moisture content biomass are obtained by thermal decomposition of stored dry biomass, a fifth step in which dry biomass is obtained by drying high moisture content biomass in a dryer by means of a high-temperature gas obtained by secondary combustion of the dry-distilled gas obtained in the fourth step, and a sixth step in which the dry biomass obtained in the fifth step is stored.

Description

technical field [0001] The present invention relates to a carbonization method in which biomass containing a large amount of water is carbonized by dry distillation, and in particular to a carbonization method capable of efficiently performing carbonization without substantially improving existing carbonization equipment. Background technique [0002] In recent years, with the improvement of environmental awareness, it is being developed to thermally decompose biomass such as sewage sludge, livestock manure, and food residues that are currently incinerated and landfilled by dry distillation under almost anaerobic conditions to generate carbon monoxide, Combustible gases such as hydrogen and methane, and technology to obtain carbon as solid fuel. [0003] However, in the pretreatment of biomass, such as sewage sludge with a high water content, the dry distillation must reduce the water content by heating and drying, but there is a problem that when using the combustion heat o...

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Problems solved by technology

[0010] That is, since different carbonization furnaces (carbonization furnaces) are used in the first carbonization process and the second carbonization process, a total of two carbonization furnaces are required, and there is a problem that the existing carbonization device having only one carbonization furnace cannot be used, and The problem of large-scale equipment

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