Heat energy (such as hot water, low-pressure steam or heat transfer oil) is introduced into the sealing interlayer, and the heat is transferred from the inner shell to the dried material. Driven by power, the tank rotates slowly and the materials in the tank are constantly mixed, thus achieving the purpose of strengthening drying.
The material is in a vacuum state, and the drop of atmospheric pressure makes the water (solvent) on the surface of the material reach a saturated state and evaporate, and it is discharged in time by a vacuum pump. The water (solvent) inside the material is continuously infiltrated, evaporated and discharged to the surface, and the three processes are continuously carried out, so that the material can achieve the purpose of drying in a short time.
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The single-effect concentration evaporator consists of a heater, an evaporation chamber, a condenser, a vacuum pump (or a combination of a hydraulic ejector and a multistage pump), an energy-saving steam thermal compression pump, a circulating discharge pump and a console. Suitable for low-temperature continuous concentration of heat-sensitive materials (such as milk, fruit and vegetable juice, liquid medicine, etc.). ) is carried out in vacuum, which has the characteristics of instantaneous high efficiency, energy saving and continuous concentration.
Working principle:
The material is evenly distributed to the evaporator tube through the distributor, and the material flows from top to bottom in the form of spiral film under the action of gravity and secondary steam, and exists in the form of self-evaporation. At the same time, the material film exchanges heat with the steam on the outer wall of the tube, so that the water in the material is heated and evaporated, and the stable temperature difference and heat transfer area form stable water evaporation. The secondary steam formed by evaporated water can be used for many times, so that heat energy can be used to the maximum extent and steam consumption can be reduced, thus forming the design principle of multiple evaporation.