Composite biomass fuel

Abstract

The invention discloses a composite biomass fuel, and belongs to the technical field of the composite biomass fuel. The composite biomass fuel is prepared from, by weight, 40-50 parts of straw stalk, 30-40 parts of wood flour, 10-15 parts of kaolin, 5-10 parts of aluminum oxide, and 10-20 parts of wood charcoal. The biomass fuel is low in water content, low in alkaline earth metal content and high in lignin content; compared with the regular biomass fuel grain compressed and shaped by straw, the biomass fuel is high in burning value and long in burning time; through adjusting alkali metal in the biomass fuel grain by the added kaolin and aluminum oxide, the fuel is not easy to form slag; the biomass fuel grain is free from emission of harmful gas after burning.

Description

technical field [0001] The invention relates to a composite biomass fuel and belongs to the technical field of composite biomass fuels. Background technique [0002] Agricultural and forestry wastes, such as straw, sawdust, bagasse, rice bran, etc., are used as biomass fuels as green energy, and are fuels encouraged by national policies. From the perspective of life cycle, biomass burning releases carbon dioxide, which does not increase the carbon dioxide content in the atmosphere. Therefore, this carbon dioxide is not treated as a greenhouse gas according to national agreements. [0003] However, in the process of biomass combustion, because biomass contains more water and alkaline metal substances (especially crop straw), it is easy to cause ash accumulation and slagging to damage the combustion bed during combustion, and sintering may also occur. The high alkali metal content (K, Na) in biomass leads to a low ash melting point of biomass, which brings many problems to t...

AI Technical Summary

Problems solved by technology

[0003] However, in the process of biomass combustion, because biomass contains more water and alkaline metal substances (especially crop straw), it is easy to cause ash accumulation and slagging to damage the combustion bed during combustion, and sintering may also occur.

High alkali metal content (K, Na) in biomass leads to low ash melting point of biomass, which brings many problems to the combustion process

In the process of combustion and utilization, high alkali metal content is an important factor that causes ash, slagging and corrosion on the heated area of ​​the boiler, which will directly reduce the life of the boiler and reduce thermal efficiency; at the same time, high alkali metal content is also easy to cause the agglomeration of bed materials , Slagging destroys the fluidization in the bed and deteriorates the combustion conditions