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1 问题的提出钢制管壳式换热器具有承受压力、温度高,适用介质广泛,安装使用方便等优点,作为一种单元设备,至今仍大量应用于化工、轻工、电力、原子能等工业部门中。进入21世纪,国产的管壳式换热器管子与管板的连接方式还在延用传统的
1 PROBLEM PROBLEMS Steel shell and tube heat exchangers are widely used in industries such as chemical industry, light industry, power industry and atomic energy as pressure and temperature, high temperature, wide range of applicable media, easy installation and use. Department. Into the 21st century, the domestic shell and tube heat exchanger tubes and tube plate connection is still using the traditional extension