Application and Characteristics of Plate Evaporator in Juice Concentration
The process of juice evaporation and concentration is the process of solution concentration and solvent recovery under the condition of inputting a certain amount of heat to the system. In the juice beverage industry, evaporation is a very important process, and plate evaporators are widely used in juice concentration.
In the juice concentration industry, plate evaporators have the following characteristics:
1. Easy maintenance and cleaning: The plate evaporator is composed of heat exchange plates fixed on the frame. Each group of plates is welded, and the plate groups are separated from each other by sealing gaskets. If there are problems such as flow channel blockage and scaling, the plate can be removed for cleaning or directly cleaned online. If the plate is damaged, it is also easy to replace.
2. Easy to adjust or expand: When the product is changed or the process is adjusted, the processing capacity of the evaporator can be adjusted directly by increasing or decreasing the number of plates of the plate evaporator, thereby reducing the production capacity.
3. Small footprint and convenient installation: the heat transfer coefficient of the plate evaporator is 2-4 times that of the tube type. Under the same heat exchange area, the height of the plate type evaporator is much smaller than that of the tube type evaporator, so that the structure of the plant is simpler. , the cost is lower. Due to the small footprint of the evaporator, the installation of the whole set of equipment is also easier, no special equipment is required, and the equipment installation cost is reduced.
4. During the material residence time, the plate evaporator is suitable for heat-sensitive products: if heat-sensitive products stay at a higher temperature for a period of time, some components will be destroyed, the flavor of the product will decrease, and the color will become darker. The plate evaporator has a small volume, a large heat exchange area, and a short residence time of the material to be evaporated in the heat exchanger, which greatly improves the quality and taste of the juice and other materials.
5. Short evaporation time: Due to the high heat transfer coefficient, the liquid can pass through the heat exchanger faster, and the entire plate evaporator can reach equilibrium in a shorter time.
6. Suitable for high-viscosity fluids: Under the action of the special corrugated plates of the plate evaporator, the fluid forms a strong turbulent flow, which is not easy to adhere to the heat exchange surface. Even for high-viscosity liquids, a high heat exchange coefficient can still be achieved. .
7. Small temperature difference: The temperature difference between each effect is smaller than that of the shell and tube type. When the plate evaporator is used as a multi-effect evaporator, the temperature of the first effect can be lower, the number of effects can be increased or the product can be treated more gently.
