Method for preparing biomass fuel

Abstract

A method for preparing biomass fuel includes the following steps that firstly, a wood pile is poured into a smashing machine and scattered and broken off by the smashing machine; secondly, the wood pile smashed by the smashing machine is conveyed to a front-stage roller press through a first scraper conveying device, and the wood pile is pressed into wood pile pieces by the front-stage roller press; thirdly, the wood pile pieces are conveyed to an iron removal device through a first spiral conveyer, and iron residues in the wood pile are cleaned out by the iron removal device; fourthly, the wood pile pieces with the iron residues removed are conveyed to a rear-stage smashing device through a second spiral conveyer, and the wood pile is smashed into wood pile powder by the rear-stage smashing device; fifthly, the wood pile powder is conveyed to a softening furnace to be heated and softened by a third spiral conveyer; sixthly, the heated and softened wood pile powder is conveyed to a granulator to be granulated by a fourth spiral conveyer, and biomass fuel particles are prepared.

Description

technical field [0001] The invention belongs to the field of biomass fuel and relates to a preparation method of biomass fuel. Background technique [0002] Biomass pellet fuel is made of agricultural and forestry waste as raw material through crushing, mixing, extrusion, drying and other processes to make granular fuel. It is a new type of clean energy strongly advocated by the country. Reliable features are favored by users; now when producing biomass fuel, in order to ensure that the wood miscellaneous materials will not damage the pulverizer and granulator after being made into powder, it is generally necessary to remove wood piles, tree knots, etc. The hard and large wooden piles are removed, and small pieces of soft materials such as branches and leaves are left for crushing and granulation. However, during the crushing process, the small particles formed by the wooden piles still have a certain hardness, and they are still mixed with iron foam, Steel flakes and other...

AI Technical Summary

Problems solved by technology

[0002] Biomass pellet fuel is made of agricultural and forestry waste as raw material through crushing, mixing, extrusion, drying and other processes to make granular fuel. It is a new type of clean energy strongly advocated by the country. Reliable features are favored by users; now when producing biomass fuel, in order to ensure that the wood miscellaneous materials will not damage the pulverizer and granulator after being made into powder, it is generally necessary to remove wood piles, tree knots, etc. The hard and large wooden piles are removed, and small pieces of soft materials such as branches and leaves are left for crushing and granulation. However, during the crushing process, the small particles formed by the wooden piles still have a certain hardness, and they are still mixed with iron foam, Steel flakes and other sundries will cause damage to the pulverizer and granulator, and the wooden piles are generally large in size and irregular in shape, which is not easy to process

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