The process of evaporative concentration of fruit juice involves concentrating the solution and recovering the solvent under controlled heat input. In the fruit juice beverage industry, evaporation is a crucial process, and plate evaporators are widely used in fruit juice concentration.
Plate evaporators consist of heat exchange plates fixed to a frame, with each set of plates welded together and separated by sealing gaskets between plate groups. In case of blocked flow channels or fouling, the plates can be disassembled for cleaning or cleaned online directly. Damaged plates are also easy to replace.
When product changes or process adjustments are needed, the evaporator's handling capacity can be directly adjusted by increasing or decreasing the number of plates, thereby reducing production capacity as required.
The heat transfer coefficient of plate evaporators is 2-4 times that of tubular evaporators. With the same heat transfer area, the height of plate evaporators is much smaller than that of tubular evaporators, simplifying the factory structure and reducing costs. Due to their compact size, the installation of the entire equipment is easier, requiring no special equipment and reducing installation costs.
Heat-sensitive products exposed to high temperatures for a period of time can suffer from component damage, decreased product flavor, and darkened color. Plate evaporators are compact with a large heat transfer area, resulting in a short residence time for the material to be evaporated within the heat exchanger, significantly improving the quality and taste of fruit juices and other materials.
Due to the high heat transfer coefficient, liquids can pass through the heat exchanger more quickly, and the entire evaporator can reach equilibrium in a shorter time.
Under the action of the special corrugated plates in plate evaporators, fluids form intense turbulence and are not prone to adhering to the heat transfer surface. Even for high-viscosity liquids, a high heat transfer coefficient can still be achieved.
The temperature difference between stages is smaller than that of shell-and-tube evaporators. When used as multi-effect evaporators, the temperature of the first effect can be lower, allowing for an increased number of effects or gentler product treatment.
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