What are the types of drying equipment?
the drying medium, the thermal efficiency is high, the product is not polluted, but the drying capacity by the metal wall heat transfer area limit, the structure is also more complex, often in vacuum operation; radiation dryer is the use of various radiation Emitting a certain wavelength range of electromagnetic waves, the wet material surface is selectively absorbed into heat after the dry; dielectric dryer is the use of high-frequency electric field effect, so that the wet material inside the thermal effect of drying
According to the operating pressure, the dryer is divided into two types of atmospheric pressure dryer and vacuum dryer. Microwave flour sterilization drying equipment can reduce the moisture partial pressure of the space and accelerate the drying process, and can reduce the wet boiling point and material Drying temperature, steam is not easy to leak, so the vacuum dryer for dry heat-sensitive, easy oxidation, explosive and toxic materials and wet steam needs to be recycled occasions.
he equipment used for the drying operation. Many types. According to the operating pressure can be divided into atmospheric pressure and pressure (vacuum dryer also known as vacuum dryer). According to the operation method can be divided into intermittent and continuous. According to the drying medium can be divided into air, flue gas or other drying medium. According to the movement (material movement and drying medium flow) can be divided into parallel, countercurrent and cross flow.
According to the heating method, the dryer is divided into convection, conduction, radiation, dielectric and other types. Convection dryer, also known as direct dryer, is the use of hot dry media and wet material in direct contact with convection way to transfer heat, and the generated steam away; Conductive dryer also known as indirect dryer, which uses conduction The heat is transferred from the heat source through the metal wall to the wet material, and the resulting wet steam can be removed by means of reduced pressure suction, passing a small amount of purge gas or condensing it on a separately provided low
