submerged chain conveyor (SCC)

submerged chain conveyor (SCC) system efficiently removes bottom ash from boilers burning solid fuels such as coal, bark, wood or refuse. custom designed material handling systems have successfully met the demanding requirements of power generating facilities operating worldwide.

The  submerged chain conveyor system easily and efficiently handles bottom ash, mill rejects and economizer ash for immediate transport or disposal. This simple design eliminates or reduces the quantity of many typical bottom ash system components such as pumps, control valves, refractory, pipe and fittings. No dewatering bins or storage ponds are needed.

In bottom ash applications, the SCC system receives the hot ash slag and clinkers falling from the boiler through a transition chute to the water-filled trough. The transition chute provides an air-tight seal between the boiler and the conveyor. The water quenches and cools the hot ash and slag, shattering some of the large clinkers as a result of thermal shock. The ash then settles to the bottom of the conveyor, and is efficiently conveyed to an inclined section of the system for dewatering, producing a manageable product. At the top of the incline, a discharge chute directs the ash into a storage bin or truck.

The SCC system is also ideal for handling mill rejects and economizer ash. Mill rejects are typically stored in a hopper within close proximity to the mills and then periodically sluiced hydraulically to the submerged conveyor where they are conveyed and dewatered with bottom ash. Economizer ash may be conveyed either mechanically or hydraulically to the submerged chain conveyor as well.