Multi-stage internal circulation drying machine for biomass fuel preparation

Abstract

The invention relates to a multi-stage internal circulation drying machine for biomass fuel preparation. The drying machine comprises a drying box body, a feeding port is formed in the top of one sideof the drying box body, a first-stage material conveying belt extends out of the position where the feeding port is formed, and the first-stage material conveying belt located outside the drying boxbody is connected with a material lifting device used for supplying materials to be dried. A second-stage material conveying belt, a third-stage material conveying belt, a fourth-stage material conveying belt and a fifth-stage material conveying belt are arranged in the drying box body and sequentially located below the first-stage material conveying belt from top to bottom. A plurality of parallel hot air pipes are arranged at the bottom of the side face of the drying box body, the hot air pipes extend into the drying box body, and the other end of each hot air pipe is connected with a hot-blast stove device used for providing hot air. The drying machine can be used for improving the operation safety of equipment under the condition of ensuring the drying efficiency during drying work ofpowder materials in the biomass fuel preparation process.

Description

technical field [0001] The invention belongs to the technical field of biomass fuel processing equipment, in particular to a multi-stage internal circulation biomass fuel preparation dryer. Background technique [0002] Biomass fuel is mainly made of wood chips, branches, crop straw, rice husk, rice husk, bamboo and other fiber-rich materials that are crushed, dried, and granulated. Among them, in the process of drying powder, currently used The drying equipment adopts drum drying equipment. The disadvantage of using the above drying method is that because the material needs to be turned over at a high speed with the drum, and under high temperature conditions, the contact between the material and oxygen is increased. It is easy to generate sparks, and then cause the material to catch fire, which brings potential safety hazards. Therefore, it is necessary to design a device for drying crushed materials. Contents of the invention [0003] The purpose of the present inventi...

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Problems solved by technology

[0002] Biomass fuel is mainly made of wood chips, branches, crop straw, rice husk, rice husk, bamboo and other fiber-rich materials after being crushed, dried and granulated. Among them, in the process of drying powder, the currently commonly used The drying equipment adopts drum drying equipment. The disadvantage of using the above drying method is that because the material needs to be turned over at a high speed with the drum, and under high temperature conditions, the contact between the material and oxygen is increased. It is easy to generate sparks, which will cause the material to catch fire and bring safety hazards. Therefore, it is necessary to design a device for drying crushed materials.

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