Hot air drying device

Abstract

The invention discloses a hot air drying device and relates to earlier stage preprocessing equipment for biomass fuel. The hot air drying device comprises a rotary shaft, a spiral stirring plate and a shell. An auger (4) is formed by the rotary shaft and the spiral stirring plate. The rotary shaft is provided with a hollow shaft body (4-3). The spiral stirring plate (4-2) is encircled on the outer side of a wall body of the hollow shaft body (4-3) in a spiral mode. The shell (3) is of a front-back-through cylinder structure. An air drying tunnel (3-2) is formed in an internal space of a cylinder of the shell (3). A front end socket (12) is arranged at the front end of the shell (3). A rear end socket (5) is arranged at the rear end of the shell (3). The auger (4) is arranged in the air drying tunnel (3-2). An air supply pipe (7) is connected to the rear end socket (5) and communicates with an internal space of the hollow shaft body (4-3) through an air inlet of the rear end of the rotary shaft of the auger (4). The hot air drying device is applied to previous preprocessing working procedures of forestry and agricultural residue or household refuse gasification systems. Hot air diffuses from the center and can permeate into materials more easily, and full contact of the materials with the hot air is facilitated, so that the materials are dried more easily.

Description

technical field [0001] The invention relates to pretreatment equipment for biomass fuel, in particular to a drying device for biomass fuel. Background technique [0002] Biomass fuels include domestic waste, agricultural waste, forestry waste, wood processing residues, aquatic plants and energy plants. my country's biomass resources are very rich, but they cannot be used effectively. Every year, a large number of straws are burned in the form of burning land, which not only wastes resources, but also damages the ecological environment. Large-scale burning of wasteland will cause smog. With the development of my country's national economy and the continuous expansion of urban scale, domestic waste has increased rapidly. At present, landfill and incineration are mainly used to deal with domestic waste in my country. Landfill processing of domestic waste not only takes up a lot of land and wastes resources, Moreover, it is easy to pollute the land and groundwater; adopting the ...

AI Technical Summary

Problems solved by technology

However, agricultural and forestry waste or domestic waste has high moisture content and low calorific value, which greatly increases the treatment cost

The pre-treatment of waste fuel in existing waste incineration power plants is to store the waste in the storage pit for a certain period of time, and reduce the water content of the waste through natural compression and fermentation. The waste fuel treated in this way cannot be used as a gasifier raw material utilization

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