SIUC’s cleandirty coal
A report from the coal plant.
They get 50K tons/coal a year and use it mostly to make steam- 101 lbs of steam/hour using 3 coal fired boilers and 1 natural gas boiler. The peak load is midsummer. Steam is used to cool as well as heat. It is cheaper to make steam (as of this interview) with coal than with natural gas. 5-10 trucks a day come to the plant from the mine up near DeSoto about 25 miles north. The plant also runs a ; this is sold on the grid, not necessarily kept here for use at the school. the amount of electricity produced is 15% of the school’s overall demand.
There are four crews, with four men each employed by the plant, working in rotating shifts.
They are using bituminous coal which contains 3-3.5% sulfur. “Cleaning” the coal: - the scrubber; they mix in limestone and that reacts and bonds with the sulfur to form SO2. There is a dust collector as well. Loads of the ash - scrubbed material- is removed by truck and taken back to the mine.
The CO2 output in August 2009 was 100ppm. A consortium of universities in the midwest buy power from Mid America, allowing them to control a 75 MW block (giving them more control over prices- kind of a cooperative purchase structure.
Analysis; this means that we are tied to other schools electricity choices; they change their sources, and it will be easier for us to change ours.
Posted: December 15th, 2011 under news.
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