- Project Overview
- Repowering of existing 25MW natural gas fueled power plant
- Addition of a new Coal-fired boiler
- Addition of a new 18MW Steam-driven generator
- Implementation of a state of the art coal handling and storage system
- Major Deliverables
- Project Management
- Construction Management
- Assistance with pre-existing engineering design
- Field Engineering - electrical, piping, structural, etc.
- Project Controls
- Process Unit Operations
- Fully Automated Unloading System
- Conveying and Crushing
- Dust Collection
- Fire Prevention
The plant is fueled with Powder River Basin (PRB) coal, which is delivered via a new rail spur that was installed as part of the repowering effort. The rail cars are emptied from the bottom using a fully automated Ashross unloading system and the coal is then conveyed to one of the two 6,000 ton storage domes. From there, the coal is crushed and conveyed across the street to the storage silos that feed the boiler. The conveyors are mounted inside a series of elevated tubes and work in conjunction with an extensive dust collection and fire prevention system.
The new boiler takes advantage of fluidized bed technology, which uses upward-blowing jets of air to suspend the crushed coal particles in order to improve efficiency of burning and minimize sulfur and NOx emissions. This is achieved by the lower operating temperatures generated by the fluidized process and the addition of crushed limestone to the coal feed. The steam generated by the boiler is then directed to either the Field support existing 25 MW turbine/generator or the new 18 MW turbine/generator. A new air-cooled condensing unit was also installed in conjunction with the new generator.