TVA – Kingston Plant
- Owner: Tennessee Valley Authority
- Project: Rail Unloading and Coal Blending System
- Location: Kingston Fossil Plant, Kingston, Tennessee
- Scope: Engineering, Procurement, Construction, Startup and Commissioning
Project Background
Roberts & Schaefer Company was awarded a turnkey contract from TVA for engineering, procurement, construction, start-up, and commissioning of the rail unloading and coal blending system at TVA’s Kingston Fossil Plant in Kingston, Tennessee. The system was successfully completed and in operation in 2000.
The Kingston coal handling facility received coal by train that was unloaded at a rotary car dumper on ladder tracks. To modernize and increase the unloading system capacity a rapid discharge bottom dump unloading system was furnished with a capacity of 4,400 TPH. To stockout and store regional coals for blending the fixed stockout conveyor was replaced by a sacking conveyor and transfer conveyor to two stacking tubes. There are provisions for a third stacking tube and the transfer conveyor would be extended and reversing. Each stacking tube provided for a 62,000–ton capacity segregated pile.
Reclaim for blending from the piles is by two variable capacity rotary plow feeders. The reclaim capacity was increased from 2,000 to 2,400 tph. At the new crusher building two 1,200 tph crushers processed the coal, and then transfer the coal to the existing dual plant supply conveyors. These conveyors were modified with new drives and increased belt speed for the increased capacity. The ancillary systems included fire protection, wet–dust suppression, as-received and as-blended sampling systems, and ventilation systems. All process equipment is controlled by a distributed control system.