Engineering Boiler and Power Plant

To my knowledge there are two types of boilers:
1.Fire tube.
2.Water tube.
Boiler Fuel Type:
1.MDF (Marine Diesel Oil) = IDO (Industrial Diesel Oil).
2.Residu = MFO (Marine Fuel Oil).
3.Solar (HSD).
4.Gas (LNG and LPG).
5.Coal.
Coal Boiler operating principles:
The construction of the motor is different than other Boiler2.
Coal (size = nut) placed on the conveyor CHAIN.
The first ignition of wood needs provoked by dehydration.
At the bottom of the conveyor exhaled air of a blower.
Thickness of coal bed of the conveyor CHAIN, CHAIN & Blower speed conveyor scale of the wind determines one's way hot.
At the end of the conveyor CHAIN Coal ash will fall and the valve using a conveyor with a given water, no dust and can be placed at the disposal of coal ash.
In the sewers (Flue / chimney) with a Dust Collector.
So a quick way of working coal boilers, may be useful.