Biomass granular fuel manufacturing method and granulator circular mould

Abstract

The invention relates to a biomass granular fuel manufacturing method. The method includes: 1) crushing hardwood raw materials, and drying until the moisture content reaches 8-10%; 2) spraying steam into a feeding spiral pipe to realize preheating and softening treatment of the crushed hardwood; 3) granulating, cooling, screening and packaging, wherein the granulator circular mould inner diameteris 600mm, the workface width is 106mm, the drill hole amount is 1401, mould holes are in staggered arrangement, the forming mould hole diameter is 8mm, a mould hole inlet taper angle is 20 degrees, the mould hole inlet diameter is 11mm, a mould hole compression ratio is 4, and the release hole diameter is 10mm. The biomass granular fuel manufacturing method has advantages that 1) by preheating treatment, the crushed hardwood can be softened to reduce hardness of the crushed hardwood, and accordingly abrasion of a circular mould can be reduced; by temperature increasing of the crushed hardwood,lignin can be plastified quickly to benefit particle forming; 2) the granulator circular mould is made from an ADI1400-2 cast iron material, and toughness and abrasion resistance of the circular mould are improved; mould hole quantity guarantees productivity and circular mould strength; mould hole structural parameters are beneficial to particle forming, and mould hole inlet abrasion is remarkably reduced.

Description

technical field [0001] The invention relates to a method for manufacturing biomass granular fuel and a ring die for a pellet mill, belonging to the technical field of biomass granular fuel manufacturing. Background technique [0002] Biomass pellet fuel is a renewable and clean energy that has been widely used. Its preparation process has an important influence on the quality of pellet fuel. The pellet mill ring die is one of the key components of the biomass pellet fuel pellet machine, which is used for the molding of biomass pellet fuel. Its structural parameters, such as forming die hole diameter, die hole inlet cone angle, die hole inlet diameter, opening ratio, compression ratio, release hole diameter, etc., have a direct impact on the molding quality of biomass pellet fuel and the service life of ring die . Different biomass raw materials have different requirements on the structural parameters of the ring die. The structural parameters of the ring mold must be det...

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