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The process of removing moisture from the material is called drying. Different production processes have different requirements for drying process. Metallurgical and mechanical manufacturing industries often use Refractory processes to heat refractory bricks, casting sand cores and cores. Wood processing industry often uses drying technology to dry wood. The food industry also uses drying technology to dry food. In short, drying materials by drying process is very common in production and life, and using gas as heat source has its unique advantages over other fuels.
According to the different ways of producing hot air, gas drying devices can be divided into two types: direct hot air stove generating device and indirect hot air generating device. Direct hot air generator refers to the hot air formed by the mixture of combustion products and air, which enters the drying chamber directly through the induced draft fan for drying materials. Hot air generator means that the air is simply heated outside the heating pipe into the drying chamber, because it is indirectly heated, so there is no combustion product in the hot air.