System for preparing water-coal slurry

The utility model provides a system for preparing water-coal slurry, which comprises a raw material coal hopper and a coal slurry groove, wherein the raw material coal hopper is connected with a grinding machine, a rotary drum screen is connected and arranged at an outlet of the grinding machine, and the coal slurry groove is connected with the rotary drum screen. The system is characterized in that the grinding machine is further connected with at least one of a pulverized coal machine and a coal slurry machine, and outlet/outlets of the pulverized coal machine or/and the coal slurry machine is/are connected with the grinding machine. The system can complete the process of preparing the high-concentration water-coal slurry by adopting pulverized coal and coal slurry incoming stock in different particle sizes and can prepare the water-coal slurry with the concentration of 67-75%, which is 2-8% higher than that of the water-coal slurry prepared by the prior art. Simultaneously, at least one of raw coal and the