Dayton Power and Light - Stuart Generating Station
- Owner: Dayton Power & Light
- Project: Limestone and Gypsum Handling Systems
- Location: Stuart Generating Station, Aberdeen, Ohio
- Scope: Engineering, Procurement, Construction, Startup and Commissioning
Project Background
Roberts & Schaefer Company was awarded a turnkey contract from Dayton Power & Light for engineering, procurement, construction, start-up and commissioning of the limestone and gypsum handling systems at Dayton Power & Lights Stuart Generating Station in Aberdeen, Ohio. The systems were successfully completed and in operation in 2007.
The limestone handling system is designed to receive limestone from barges and convey the limestone at 1,000 TPH through a series of transfer towers to either an elevated stockout conveyor with a traveling tripper or to divert some limestone to the storage bins at the limestone preparation building. The traveling tripper forms a 50,000-ton limestone storage pile. Limestone is reclaimed from the storage pile with four hoppers and variable speed belt feeders and conveyed at 450 TPH to a transfer tower. From there dual conveyors transfer the limestone to three storage bins at the limestone preparation building. The bins are fed by chute work or dual reversing conveyors. All areas of the limestone handling system are provided with bag house dust collection or wet dust suppression.
The gypsum handling system is designed to receive gypsum from the process filters and convey it at 250 TPH each on dual conveyors to a transfer tower and onto two radial stackers. The radial stackers each stockpile three conical piles of 5,700 tons each. Gypsum is reclaimed from the storage piles with hoppers and variable rate screw feeders fed by mobile equipment. The gypsum is conveyed at 500 TPH to the barge loadout area and onto a barge loadout shuttle conveyor equipped with a telescopic chute. Alternately, gypsum can be directly transferred from the radial stacker through a transfer hopper and conveyors to the barge loadout shuttle conveyor.