... 2.Automatically temperature-testing 3 Low fuel consumption Coal Fired Type Air Heater Applicable Range:1. Processing and drying for chemical, textile ... gas, liquid gas.Types:1.Directly Heating FurnaceThe hot-blast air which generated by the fuel will be used to dry ... sensitivity, like milk powder, synthetic resin. This heating device heats air by various forms of heat exchanging. The larger of the ...