Up-and-down type roller drying equipment for biomass fuel

Abstract

The invention discloses up-and-down type roller drying equipment for biomass fuel, and belongs to the technical field of material drying. According to the up-and-down type roller drying equipment, the biomass fuel can be driven by a shoveling plate to dynamically roll in a rolling mode of an inner roller, a control box on an outer heating cylinder provides heat and applies a magnetic field, so that the inner roller is always heated uniformly, and a high-temperature area is not prone to occurring; an up-and-down layer is arranged on the inner roller, when the up-and-down layer rotates to the upper side, the up-and-down layer is interfered by the magnetic field of the control box to generate a repulsion phenomenon, the up-and-down layer can actively arch towards the inner side, and synchronously pulls an up-and-down strip to be unfolded, so that the biomass fuel adhering to a wall is stripped; the shape is restored after the up-and-down layer rolls away from the magnetic field range of the control box, so that the contact heat conduction effect of the biomass fuel and the metal wall of the inner roller cannot be influenced; and compared with an existing roller dryer, the up-and-down type roller drying equipment has the advantages that the wall adhering phenomenon of the biomass fuel can be reduced by utilizing the up-and-down action of the up-and-down layer, and the drying efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of material drying, and more specifically relates to an undulating drum drying equipment for biomass fuel. Background technique [0002] Biomass fuel: refers to the burning of biomass materials as fuel, generally mainly agricultural and forestry wastes (such as straw, sawdust, bagasse, rice bran, etc.). The main difference is from fossil fuels. In the current national policy and environmental protection standards, direct combustion of biomass is a highly polluting fuel, which is only used in large stoves in rural areas and is not allowed to be used in cities. The application of biomass fuel is actually mainly biomass briquette fuel, which uses agricultural and forestry waste as raw materials, and is made into various shapes (such as lumps, granules, etc.) through crushing, mixing, extrusion, drying and other processes. A new type of clean fuel that can be directly burned. [0003] Drum dryer is one of the...

AI Technical Summary

Problems solved by technology

[0004] At present, the drying equipment for biomass fuel generally adopts a drum dryer. Since the ignition point of biomass fuel is generally 160°C, it is flammable and its calorific value will decrease after being polluted. risk, most of the existing technologies use indirect heating to dry through the heat conduction of the metal wall, but the biomass fuel containing moisture is easy to stick to the wall, forming a thick "hard shell", which greatly insulates Heat conduction is impaired, resulting in a sharp drop in drying efficiency

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