FIELD: process engineering.
SUBSTANCE: invention relates to power engineering, particularly, to recovery of power generating plant ash resulted from combustion of lignite and coal and may be used for separating ash-and-slag wastes into magnetic and nonmagnetic fractions without chemical reagents. Proposed unit comprises ash-and-slag wastes receiver, and interconnected magnetic separation and filtration devices. Said ash-and-slag wastes receiver is composed of flushing unit consisting of tank with mechanical mixer or water feed nozzles, and water feed pipeline. Magnetic separation device is composed of drum-type high-gradient magnetic separators of, at least, first and second stages. Additionally, said line is equipped with magnetic fraction grinder arranged between aforesaid magnetic separators. Disc vacuum filters are used for filtration of magnetic and nonmagnetic fractions.
EFFECT: higher efficiency.
1 dwg
