The combustion of biomass will not increase carbon dioxide emissions

and the development of biomass coal coupled power generation technology is a feasible way to accelerate the transformation and upgrading of electricity. The compressed biomass and coal powder are ground in different coal mills without mixing

and are fed into the furnace by different burners. This method does not require additional biomass treatment equipment or setting up a biomass fuel treatment workshop

which can greatly save investment and factory space. The key limiting technical factor is whether the pulverizer of the power plant can effectively grind biomass Pellet fuel

and how to evaluate the adaptability of the existing pulverizer to the new coupling fuel. To this end

a medium speed coal mill experimental platform was built to analyze the adaptability of the medium speed coal mill in grinding biomass particles. The results show that the grinding output of the medium speed coal mill decreases when grinding wood chip biomass particles

and the effective output correction coefficient is 0.65～0.70; When the ZGM medium speed coal mill grinds sawdust particles

the loading force characteristics and separator characteristics both vary significantly at the particle size boundary of 0.2 mm. Therefore

the screening fineness R200 and R500 can be considered as the measurement standards for the uniformity of biomass particle materials ground by the coal mill;Compared with pulverized coal

the increase of loading force of milled biomass particles or the increase of rotating speed of the current separator has a large difference in the influence of fineness distribution

which needs further indepth research.