1. The significant importance of biomass co-combustion in large pulverized coal boilers The country is a major agricultural nation, with at least 700 million tons of crop waste produced each year, equivalent to about 350 million tons of standard coal. Developing and utilizing biomass energy is of great practical significance for ensuring national energy security, reducing carbon dioxide emissions, improving the human living environment, and achieving sustainable development. 2. Biomass co-combustion engineering practice in a 300MW power plant unit The grinding effect of biomass powder on a medium-speed direct blowing roller mill at a certain power plant is good, with fine powder particles and normal operation of the pulverizing system. When the biomass feeding rate does not exceed 24t/h, the operating current of the mill is normal. The pictures of the flame from the biomass spray nozzle indicate that biomass powder can maintain normal ignition and stable combustion within the furnace just like coal powder, and by controlling the lower inlet air temperature, No signs of pre-ignition at the nozzle were observed. The co-combustion of biomass can reduce NOx emissions by about 15%; at the same time, SO2 emissions are slightly reduced to 84ppm. In areas where the unit price of standard coal is higher than 800 yuan/ton, it will bring direct economic benefits to the power plant. Cooperation conditions: unlimited.