::bottom_ash_handling_submerged_scraper_chain_conveyor

Bottom Ash Handling
Submerged Scraper Chain Conveyor System

For projects demanding continuous removal of bottom ash collected at furnace bottom, BSBK offers Submerged Scraper Chain Conveyor (SSCC) System. The system comprises of dry type refractory lined Bottom Ash Hopper (BAH) of adequate capacity with water seal trough and dip plates, allowing free expansion of the furnace without any air ingress.

BAH protects the conveyor from the direct impact of hot ash and hot ash is smoothly discharged to the water bath of the SSCC through horizontal hydro-pneumatically operated discharge gates provided below the BAH. The discharge chute at the hopper outlet remains dipped into the water slag bath of SSCC ensuring sealing of furnace bottom. Storage capacity of BAH permits sufficient maintenance time for the SSCC as well as reduces the extraction load on the SSCC. Within SSCC, a temperature of 60⁰C is always maintained. Bottom ash is extracted from the trough continuously using high quality chains, sprockets and bars. After the dewatering at the sloping portion, moist ash is discharged to a clinker crusher for onward disposal through hydraulic sluice ways or belt conveyors. For higher capacity SSCC, Hydraulic drive units, hydraulic chain tensioning units and motorized traverse drives for taking it to maintenance are provided. BSBK’s SSCC systems are installed up to capacity of 70TPH and for power plants upto 700 MW.