Coal slime drying system

An embodiment of the invention provides a coal slime drying system. High-temperature high-pressure vapor in thermal power generation byproducts can be adopted for drying coal slime, so that energy utilization rate of thermal power generation is increased. The coal slime drying system comprises a coal slime crusher, a conveyor, a coal slime dryer and a unit auxiliary steam header, the coal slime crusher is used for crushing coal slime, the conveyor is used for conveying the coal slime crushed by the coal slime crusher into the coal slime dryer, the unit auxiliary steam header is used for collecting vapor of a steam turbine and adjusting temperature and pressure intensity of the vapor to a preset threshold value range and communicated with the coal slime dryer through a pipeline and feeds the vapor into the coal slime dryer through the pipeline, and the coal slime dryer is used for adopting the vapor fed in by the unit auxiliary steam header to heat the coal slime so as to lower humidity of the coal slime. 本发明实