蒸发是用加热的方法使溶液中的部分溶剂汽化并除去的过程,其结果是形成了更加浓缩的溶液。 蒸发常用于化工、食品、饮料工业,以及淡水生产等领域。蒸发器数量大、分布广,最耗能量大的设备。 工业应用中最简单的是单效蒸发器,其热效率为被加热溶液所吸收的热量Q_c与加热蒸汽放出的热量Q_h之比,即: η_l=Q_c/Q_h=(Q_h-Q_r)/Q_h式中的Q_4是由于蒸发器外表面与环境之间的辐射和对流换热造成的散热损失(全部回收加热蒸汽的凝结水显热时)。提高蒸发器壳 Evaporation is the process by which a portion of the solvent in the solution is vaporized and removed by heating, with the result that a more concentrated solution is formed. Evaporation commonly used in chemical, food, beverage industry, freshwater production and other fields. Large number of evaporators, widely distributed, the most energy-consuming equipment. The simplest application in industry is the single-effect evaporator whose thermal efficiency is the ratio of the quantity of heat Q_c absorbed by the heated solution to the quantity of heat Q_h emitted by the heating steam, ie η_l = Q_c / Q_h = (Q_h-Q_r) / Q_h Of Q_4 is due to radiation and convection heat transfer between the outer surface of the evaporator and the environment caused by heat loss (all recovery of heated steam condensation water sensible). Increase the evaporator shell