Heat exchanger is a device which is transferred to the cooling fluid of the heat fluid, and also known as the heat exchanger. Heat exchanger is widely used in the daily life of heating heat sink, steam turbine unit in the condenser and the space rocket oil cooler, etc., are heat exchanger. It is also widely used in chemical, petroleum, power and atomic energy and other industrial sectors. Its main function is to ensure that the process of the medium required by the specific temperature, but also to improve the energy utilization rate of one of the main equipment. Heat exchanger both but a stand-alone device, such as heaters, coolers and condensers; but also part of a process equipment, such as a heat exchanger for ammonia synthesis tower.