Preparation method of biomass fuel rod with high calorific value and low emission

The invention discloses a preparation method of a high-calorific-value low-emission biomass fuel rod, which comprises the following components by mass: 60%-70% of biomass fuel, 20%-30% of coal gangue, 5%-10% of a binder, 0.5%-1% of a lubricant, 0.5%-1% of a sulfur-fixing agent, and 1%-5% of a combustion improver. The process comprises the following steps: (1) crushing, screening, stirring and drying coal gangue and biomass, and adding a certain amount of a lubricant, a sulfur-fixing agent and a combustion improver to obtain a mixture; (2) adding a certain amount of binder, uniformly stirring, and carrying out compression molding; (3) performing heat treatment in an air-isolated environment according to a certain heat treatment system to obtain a fuel rod; and (4) inspecting the appearance, density and combustion performance of the prepared fuel rod, and packaging after the fuel rod is qualified. The biomass and the coal gangue are used as raw materials to prepare the fuel rod, the operation is simple, the pro