新一代大面积焊接板壳式换热器

新一代大面积焊接板壳式换热器保留了板式换热器传热效率高、结构紧凑的优点，克服了换热面积小、使用温度和压力低的缺点，因而其使用范围几乎与管壳式换热器相当。其板片由水下爆炸成型，单片面积几乎没有限制，目前已有１５０００ｍ~2换热面积的板壳换热器问世。介绍了这种换热器的结构特点及在重整、加氢装置中的应用。全面比较了各项使用性能及经济性，指出大面积焊接板壳换热器是大型石油化工企业中最有发展前途的高效换热设备之一。

LARGE AREA WELDED PLATE-SHELL TYPE HEAT EXCHANGER

The new generation large area welded plate-shell type heat exchanger retains the advantages of platetype heat exchanger such as high heat transfer efficiency, compactness, etc. and surmounts the disadvantages such as small heat exchanging area, low temperature and pressure in application. Thus its application scope is almost matched with that of tube-shell type heat exchanger. The plates are manufactured via underwater explosive forming without limitation on area. Now the plate-shell type heat exchangers with a total area of 15000m2 have been made. Configuration characteristics of this type exchanger and its application in catalytic reforming and hydroprocessing units were introduced. Various performances and economic characters were completely compared. It was pointed out that this type of exchanger is one of the most promising heat exchangers with high efficiency.