... to convey the material under the dryer2. Working principle of the rotary kiln dryer:Material to be dried enters ... ).The gas stream can be made up of a mixture of air and combustion gases from a burner, ... work by one worker ,feeding /output / others operating by workerA:boiler,B:steam tank ,steam pipes,water ... pipes,valve,pressure meters,C:tools for worker operating.5.5*3.5*2.5mnot includethe boilershell ...