Constellation Energy – Brandon Shores Station
- Owner: Constellation Energy
- Project: Limestone and Gypsum Handling Systems
- Location: Brandon Shores Power Station, Baltimore, Maryland
- Scope: Engineering, Procurement, Construction, Start–Up and Commissioning
Project Background
Roberts & Schaefer Company was awarded a turnkey contract from Washington Group for engineering, procurement, construction, start–up and commissioning of the limestone and gypsum handling systems at Constellation Energys Brandon Shores Power Station in Baltimore, Maryland. The systems will be completed in 2010.
The limestone handling system is designed to receive limestone from 2,000 or 4,000–ton capacity barges with a rotary clamshell bucket crane. The material is unloaded and conveyed at 1,500 TPH through a series of transfer towers to either a storage dome or a stacking tube (inactive storage pile). The capacity of the storage dome is 8,000–ton and the pile is formed with a stacking tube. Additionally, 400 TPH can be diverted directly to the limestone preparation building.
Limestone is reclaimed from the storage dome with mobile equipment and a reclaim chain conveyor. Limestone is also reclaimed from the inactive storage pile with mobile equipment and an emergency reclaim chain conveyor. The reclaimed limestone is conveyed at 400 TPH through a series of transfer towers to the two storage silos at the limestone preparation building. The building also is equipped with an emergency hopper/feeder and 200 TPH bucket elevator to supply limestone. The limestone handling systems are provided with insertable dust collectors or fog type dust suppression.
The gypsum handling system is designed to receive gypsum from the process filters and convey it at 400 TPH to the gypsum storage dome with a radial stacker. The dome capacity is 10,000 tons. Gypsum is reclaimed from the storage dome with a radial scraper reclaimer and conveyed at 1,200 TPH to a series of transfer towers and onto a barge loadout shuttle conveyor equipped with a telescoping discharge chute. A 750 TPH emergency reclaim chain conveyor is also located in the storage dome. The limestone and gypsum handling systems share several transfer towers.