The MRS® (Magaldi Mill Rejects System) is a new process concept designed to mechanically handle rejects from coal mills, in a dry way.
Rejects are a mixture of different materials (pyrites, stones, tramp iron, etc.) with pulverized coal, requiring a reliable and safe removal system.
Discharged from coal mills, the rejects are collected in pyrite boxes for temporary storage. The material is extracted from the pyrite boxes by MRS® extracting conveyors or vibrating feeders and then dosed onto the main MRS® conveyor, which collects the rejects produced by all the coal mills. Downstream the main MRS® conveyor, the rejects can be discharged onto a movable container or into a storage silo.
The MRS® easily accommodates an increase in rejects and coal rate (for example during mill trip) without creating any fire or explosion hazard.
In addition to the Superbelt® technology, the MRS® reliability is also guaranteed by the “open execution” design that allows:
Coal fired power plants
Unit size: 660 MWe
Project type: Greenfield
Ash rate: 7 t/h
Ash rate max: 20 t/h
Burned fuel: Coal
Boiler manufacturer: ANSALDO / BHK
Coal fired power plants
Unit size: 651 MWe
Project type: Greenfield
Ash rate: 9 t/h
Ash rate max: 22 t/h
Burned fuel: Coal
Boiler manufacturer: MHI