内展翅片管换热器特点及在环己酮装置中应用分析

Features of Inner Finned Tube Heat Exchanger and Analysis of Its Application in Cyclohexanone Plant

如何提高换热器的传热系数K、提高气液热交换气体走管程的给热系数α ,是换热器技术进步的一大课题。介绍了内展翅片管的结构及管程流体给热系数的计算方法 ,并以 6 0kt/a环己酮工程中烷三塔塔顶气体冷凝的换热流程为例 ,对比了选用管壳式换热器与内展翅片管换热器的计算结果 ,认为选用内展翅片管换热器在技术指标和经济上都是有利的。

It is a major subject in the technological advance of heat exchanger design regarding how to raise the exchanger's heat transfer coefficient K and the coefficient of heat convection α for vapor liquid heat exchange with vapor in the tube pass. The structure of inner finned tube heat exchanger and the calculation method of the coefficient of heat convection for tube pass fluid is introduced .The example of the heat exchange flow in the cyclohexane column top condenser of the 60 kt/a cyclohexanone project is taken, and the calculation results are compared between the tube & shell heat exchanger and the inner finned tube heat exchanger, and it is concluded that it is beneficial to select inner tube heat exchanger both in terms of technical parameters and economic considerations.