With the continuous development of modern new technology, new technology and new materials and the increasingly serious energy problem, it is bound to bring more demand for high-performance and high-parameter heat exchange equipment. The performance of the heat exchanger plays an important role in product quality, energy utilization, economy and reliability of the system

role, sometimes even a decisive role. At present, the heat recovery rate in developed industrial countries has reached 96%, and heat exchange equipment accounts for about 35% to 40% of all investment in process equipment in oil refineries. The shell and tube heat exchanger is still the absolute advantage, about 70%. The remaining 30% for various types of efficient tight

Cohesive heat exchanger heater and other equipment, in which the plate, and high efficiency, and to the low temperature differential set. The development of today's heat exchanger with CFD(ComputationalFluidDynamics), modeling technology, enhanced heat transfer technology and new heat exchanger development has formed a high-tech system [1].

1 Shell and tube heat exchanger

The heat exchanger is the most widely used, theoretical research and design technology perfect, the use of good reliability of a class of heat exchanger. At present, a lot of research has been carried out to improve the heat transfer performance of the heat exchanger. There are three main ways to enhance heat transfer, such as increasing heat transfer coefficient, expanding heat transfer area and increasing heat transfer temperature difference.