Method for preparing high-density biomass fuel for roasting tobacco by tobacco stalks

Abstract

The invention relates to a method for preparing a high-density biomass fuel for roasting tobacco by tobacco stalks. The method comprises the following steps: smashing, waste tobacco (tobacco stalks, tobacco stems and tobacco leaves) used as a raw material, to obtain 1-2cm, 4-6cm and 8-10cm particle materials; drying the particle materials in a hot blast drying furnace till the water content is 7-16%; feeding dried and mixed particle materials to a stirring heater to heat; and pressing and forming by a forming device, namely a flat-die machine to obtain a product, wherein the product obtained is a solid cylinder with the diameter which is 32mm, the density which is 1.4g / cm<3>, 1.4-1.3g / cm<3> and 1.2-1.3g / cm<3>, and the length-diameter ratio l:d which is 2-6. No chemical additives are added in the preparation process. The density of the biomass fuel prepared by the invention can reach 1.2-1.4g / cm<3>, so that the biomass fuel can meet heat demands for roasting the tobacco leaves in different stages. The capacity for providing heat is better than that of fire coal, and heat provided by unit time is 4 times that of the fire coal.

Description

technical field [0001] The invention relates to a method for making tobacco stalks into high-density biomass fuels specially used for tobacco curing. Background technique [0002] The fuel used for curing flue-cured tobacco is mainly coal, and some areas have tried to use biomass fuel for baking, but the density of biomass fuel currently on the market is low, only 0.8-1.0g / cm 3 ; The density of biomass fuel is too low, and unfavorable phenomena such as fuel spallation, fly ash, frequent feeding, and insufficient combustion will occur during the combustion process, which cannot meet the requirements of baking. It is necessary to develop high-density biomass fuel to replace baking Use coal. Tobacco leaf planting produces a large amount of biomass waste that is not fully utilized every year. Discarding it in the field will bring hidden dangers of diseases and insect pests. At the same time, straw fermentation produces methane, which is more harmful to the atmosphere than carbo...

AI Technical Summary

Problems solved by technology

[0002] The fuel used for curing flue-cured tobacco is mainly coal, and some areas have tried to use biomass fuel for baking, but the density of biomass fuel currently on the market is low, only 0.8-1.0g / cm 3 ; The density of biomass fuel is too low, and unfavorable phenomena such as fuel spallation, fly ash, frequent feeding, and insufficient combustion will occur during the combustion process, which cannot meet the requirements of baking. It is necessary to develop high-density biomass fuel to replace baking use coal

Tobacco leaf planting produces a large amount of biomass waste that is not fully utilized every year. Discarding it in the field will bring hidden dangers of diseases and insect pests. At the same time, straw fermentation produces methane, which is more harmful to the atmosphere than carbon dioxide.

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