Abstract: This paper analyzes the internal and external factors affecting pulverized coal production and grinding power consumption in view of the problems existing in the MPF2116 coal mill system, such as low hourly pulverized coal production (28~30t/h) and high grinding power consumption (28kW·h/t), and proposes a transformation plan that focuses on improving the matching degree and operational efficiency of the coal mill’s grinding capacity, powder selecting capacity, drying and carrying capacity, and optimizing the flow field inside the mill; Implemented measures such as increasing the diameter of the coal mill rollers to > 1 900mm, optimizing the nozzle ring structure, upgrading the existing powder separator to an MV type high-efficiency low-resistance powder separator, and increasing the capacity of the main motor of the coal mill from 500kW to 630kW were implemented. After the transformation, the grinding, drying and separation capacity of the coal mill system was effectively balanced. Under the same coal quality and fineness, the hourly output of the coal mill was increased to >38t/h, the grinding power consumptionwas reduced by 4kW·h/t, electricity savings reached by 100×104kW·h per year, cost saving were 1.8 million yuan, and the overall efficiency of the system was significantly improved.
