At low load, increasing the air volume causes the furnace temperature to drop
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At low load, increasing the air volume causes the furnace temperature to drop, while at high load it rises.
There is a limit to the amount of oxygen required for combustion; in other words, there is a certain ratio. When this ratio is low, if a high air-fuel ratio is used, the excess air will serve a cooling purpose, and as a result the temperature will definitely drop! On the contrary, when the load is high and the amount of air supplied is insufficient, complete combustion cannot occur, and the temperature will not rise. When you increase the air supply ratio to allow for complete combustion of the fuel, the temperature naturally rises!
The combustion of air and fuel gas is exothermic, so the temperature should rise. But for them to burn, a proper ratio is needed in order to achieve a better temperature. Otherwise, whether the amount of air or fuel gas increases or decreases, the furnace temperature will tend to drop
The load is low; once the air supply is increased, the heat generated in the combustion furnace is carried to the back by the excess air, resulting in a lower furnace temperature.
The load is low; once the air supply is increased, the heat generated in the combustion furnace is carried to the back by the excess air, resulting in a lower furnace temperature.
The operation of sulfur plants involves anaerobic conditions; when the plant’s load is low, an excessive supply of air can cause hydrogen sulfide in the acidic gases to burn completely, and in such cases no heat is released from the combustion process； When the load on the device increases, the hydrogen sulfide concentration in the sulfur production furnace rises, consuming the oxygen in the excess air and resulting in combustion with heat release.