So I was wondering if pre-heating coal will improve the efficiency of a steam boiler. I did find that intake air pre-heater and water pre-heater do increase efficiency, but I could not find anything related to pre-heating coal.
If we were to take the hot exhaust, make a hot iron platform and keep the coal on top of it, it would heat it and maybe reduce the moisture content also?!
Chemistry troll idea or actually feasible?
Note: it is a traditional hand fired boiler
Coal type: Lignite