Fuel can be divided into:
1. Solid fuels, such as coal and coke.
2. Liquid fuel, such as diesel, heavy oil, alcohol-based fuel
3. Gaseous fuel, such as coal gas, natural gas, liquid gas.

 

The high-temperature combustion gas obtained after the combustion reaction of the fuel is further in contact with the outside air, and after mixing to a certain temperature, it directly enters the drying room or baking room, contacts with the material to be dried, heats and evaporates water, and thus obtains a dry product. In order to utilize the combustion reaction heat of these fuels, a set of fuel combustion devices must be added. Such as: coal burners, oil burners, gas burners, etc.