The process principle of flash evaporation involves the relationship between the boiling point and the pressure of a substance. Specifically, the boiling point of a substance increases as the pressure increases, and when the pressure decreases, the boiling point decreases accordingly. This principle is used in flash dryers to dry wet materials.
In flash dryers, the wet material is in effective contact with the hot air. Due to the high temperature of the hot air, the moisture in the material is evaporated. This process is carried out under reduced pressure, which lowers the boiling point of the material and makes it easier to evaporate the water.
As moist air circulates through the dryer, it transfers heat energy to the material, facilitating the evaporation of moisture. During the evaporation process, the water is separated from the material in a gaseous form, thus achieving the drying of the material.
It is worth noting that the equipment that brings the fluid to gasification is not the flash tank itself, but the pressure reducing valve. The function of the pressure reducing valve is to reduce the pressure of the fluid, thereby lowering its boiling point, so that the fluid can be vaporized rapidly at lower temperatures.
By using the principle of flash evaporation, flash dryers can achieve efficient and energy-saving drying effects, and are widely used in pharmaceutical, food, chemical and other fields. This drying method has high production efficiency and low energy consumption, which can meet the needs of large-scale production.