That’s the quality of the technology being used at Dry Fork Station to make it one of the cleanest coal-based power plants in the country.
Joel Dingman, operations superintendent, showing low nitrogen oxide burners waiting to be installed at Dry Fork Station.
Joel Dingman, operations superintendent at Dry Fork Station, says, “This air quality control system is state of the art for plants of this type in the United States. It’s exciting to be a part of that.”
The scrubber being used at Dry Fork is a reflux circulating fluid bed dry scrubber. It’s “dry” because it uses far less water than some other systems that absorb sulfur dioxide.
How it works:
In order to clean the emissions created by the process of energy generation, scrubbers use lime to absorb sulfur dioxide. A mixture of water and dry lime is sent into the scrubber vessel while nozzles increase the velocity of the gas entering from the boiler. During the chemical reaction between the flue gas, water and lime, the sulfur dioxide is removed. The flue gas, carrying ash and lime, goes into the baghouse where the particles stick to the bags. The bags are then shaken to release the ash and lime which are collected in hoppers and sent back to the scrubber vessel.
Dingman says, “The goal will be to use as high a percentage of the lime as possible so that it’s all inert when it becomes a waste product.”
Or watch it at Basin Electric’s video gallery: Scrubber technology at Dry Fork Station
Top-notch environmental controls at the station include mercury monitors, and over-fire air and low nitrogen oxide burners.
Engineers were looking ahead during the designing phase of Dry Fork Station. The plant site was designed for the future in case carbon capture becomes necessary.
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