Vacuum Drying Oven VS. Blast Drying Oven
Different Drying Modes
1. Vacuum drying oven: it drys materials by using a vacuum pump to vacuumize the system.
2. Blast drying oven: it drys materials by direct heating and utilizing a air blower to circulate the air in the box.
Different Working Principles
1. Vacuum drying oven: Under vacuum or low pressure, the boiling points of moisture, solvent and other volatile components in the material will become lower so that they can be separated from the material particle surface and be removed by a vacuum pump at a relative low temperature. It is mainly applicable for materials that will oxidize, polymerize or have other chemical reactions at high temperature. Furthermore, it can heat to accelerate the volatilization of moisture, solvent and volatile components so as to separate from the material surface.
2. Blast drying oven: a electric blast drying oven works by heating moisture, solvent or volatile components to make their molecular move rapidly to separate from the material. This drying mode has a high temperature and rapid speed. Under the action of draught fan, the molecular escaped from the material surface can be removed by the air exchange so that samples can be dried quickly.