文档介绍：School of Chemical and Energy Engineering, SCUT , 新型的换热设备返回School of Chemical and Energy Engineering, SCUT , 换热器的分类?按用途分类加热器、冷却器、冷凝器、蒸发器、再沸器?按冷、热流体热量交换方式分类混合式、蓄热式、间壁式?主要内容1. 根据工艺要求,选择适当的换热器类型2. 通过计算选择合适的换热器规格School of Chemical and Energy Engineering, SCUT , 间壁式换热器的类型一、夹套换热器优点:?结构简单缺点:?A小?釜内?小强化措施:?釜内加搅拌?釜内加蛇管?外循环结构:夹套式换热器主要用于反应过程的加热或冷却,是在容器外壁安装夹套制成。School of Chemical and Energy Engineering, SCUT ,杨东杰博学慎思明辨笃行二、蛇管换热器1. 沉浸式强化措施:容器内加搅拌器,提高K优点:?结构简单?管内能耐高压缺点:?管外h小结构:这种换热器多以金属管子绕成,或制成各种与容器相适应的情况,并沉浸在容器内的液体中。School of Chemical and Energy Engineering, SCUT ,杨东杰博学慎思明辨笃行2. 喷淋式结构:多用于冷却管内的热流体。将蛇管成排地固定于钢架上,被冷却的流体在管内流动,冷却水由管上方的喷淋装置中均匀淋下,故又称喷淋式冷却器。School of Chemical and Energy Engineering, SCUT ,杨东杰博学慎思明辨笃行优点:?结构简单?管内能耐高压?管外?比沉浸式大缺点:?喷淋不易均匀?占地面积大直管水槽喷淋式冷却器School of Chemical and Energy Engineering, SCUT ,杨东杰博学慎思明辨笃行三、套管换热器优点:?结构简单?能耐高压?h (K)或?tm大缺点:?结构不紧凑A/V小?接头多,易漏结构:将两种直径大小不同的直管装成同心套管,并可用U形肘管把管段串联起来,每一段直管称作一程。外管内管套管式换热器School of Chemical and Energy Engineering, SCUT ,杨东杰博学慎思明辨笃行四、列管换热器列管式换热器又称为管壳式换热器,是最典型的间壁式换热器,历史悠久,占据主导作用。School of Chemical and Energy Engineering, SCUT ,杨东杰博学慎思明辨笃行School of Chemical and Energy Engineering, SCUT ,杨东杰博学慎思明辨笃行?t>50?C时,考虑热补偿措施结构:壳体、管束、管板、折流挡板和封头。一种流体在管内流动,其行程称为管程;另一种流体在管外流动,其行程称为壳程。管束的壁面即为传热面。