To compliment the pneumatic fly ash and bed ash systems, Macawber Beekay offers most types of bottom ash conveying systems, customized to meet the individual project requirement.

MECHANICAL SYSTEMS

The Macawber Beekay's Submerged Scraper Conveyor is used for the continuous removal of furnace bottom ash from conventional PF-fired boilers and is particularly suitable where headroom is limited. The system is capable of quenching and transporting over 100 tonne / hour of ash and offers greater energy efficiency than hydraulic systems of comparable capacity. A double roll crusher feeds the ash either to a slurry disposal system, or on to belt conveyors for onward transfer.

Submerged Scrapper Conveyors have been designed and supplied for upto 600 MW boilers, and 45 meters in length, to handle 140 tonnes of stored ash.

HYDRAULIC SYSTEMS

The Water Impounded Hopper collects the bottom ash from the furnace and then transports it by means of a hydraulic sluicing pipeline to a de-watering bin, settling tank, surge tank or lagoon. Conveying rates of up to 150 tonnes / hour can be achieved with this technology.

PNEUMATIC SYSTEMS

Where bed ash is removed from the furnace of CFBC / AFBC type Boilers, Macawber Beekay is able to offer complete bed dry ash handling system using Densephase Pneumatic Conveying technology. Bed ash is cooled down by means of water jacketed surge chute and thereafter conveyed pneumatically upto the coarse ash storage silo for resale or onward disposal by truck.