The amount of fuel required for a wood sawdust rotary dryer machine to evaporate one ton of water depends on the fuel type, the thermal efficiency of the equipment, and the initial and target humidity. The following are the approximate consumption of some common fuels:

Natural gas: It usually takes about 80 to 120 cubic meters of natural gas to evaporate one ton of water.
Diesel: It typically takes about 60 to 90 liters of diesel to evaporate one ton of water.
Biomass pellets: It usually takes about 150 to 250 kg of biomass pellets to evaporate one ton of water.
Coal: It usually takes about 100 to 150 kg of coal to evaporate one ton of water.
These values are based on general thermal efficiency and actual consumption may vary depending on equipment efficiency, operating conditions and water evaporation rates.
For example, when using natural gas, if the thermal efficiency of the equipment is high, the consumption may be close to 80 cubic meters/ton of water; If the efficiency is low, it may be close to 120 cubic meters/ton of moisture.
The specific consumption is recommended to refer to the technical parameters of the equipment or consult the manufacturer.