Enhancing the power of Lignite
Using DryFine™ Technology to Be Cleaner and More Efficient
We saw these benefits and were determined to make drying and refining, or as we call it ‘DryFining,’ a key practice at Rainbow Energy Center. We now DryFine™ all the coal used at Coal Creek Station to make it cleaner and more efficient. We’re enhancing the power of lignite by using a product that would otherwise be wasted: the waste heat generated by Coal Creek Station.
The lignite is dried and refined using DryFine™ technology to reduce moisture from the coal before it enters the furnace, thereby increasing burn efficiency and reducing emissions. The process uses excess heat from the plant and removes sulfur dioxide (SO2), mercury, nitrogen oxide (NOx), and carbon dioxide (CO2).
Key Benefits from DryFining have been:
- Reduce the moisture of lignite
- Increase the energy content of lignite
- Increase power plant efficiency
- Reduce maintenance and related expenses
- Reduce emissions of sulfur dioxide, nitrogen oxides, mercury, and carbon dioxide
Collecting and Selling Fly Ash
Supporting Farmers By Selling Steam
Excess steam from Coal Creek Station is also sold to the neighboring ethanol plant for use in its production of ethanol, corn oil, and distiller grains. Local farmers have an expanded market for the sale of corn, which is used by the ethanol plant and blended with gasoline and transportation fuel.