The role of the plate heat exchanger is for heat exchange. The application in the chemical industry can be to exchange a certain amount of heat within a certain period of time; it can also be used for waste heat utilization for the purpose of recovering heat; or For the purpose of ensuring safety, certain equipment is damaged due to the increase in pressure caused by the increase in textile temperature.

In the petrochemical industry, there are many types and numbers of heat exchangers, and they also have very high requirements for pressure and temperature. Efficient plate heat exchangers can better cope with higher pressures and higher temperatures. Specifically, the welded plate heat exchanger has strong convenience, small size, light weight, good heat transfer performance, and low price. Therefore, it has been well applied in the offshore oil production process. It can cool mechanical lubricating oil and fresh water, and can cool related intermediate products in oil mines, and can also be used to heat crude oil. There are also some bottleneck problems in the application of high-efficiency plate heat exchangers in the petrochemical industry, that is, it is difficult to accurately design and calculate the process flow. In the production practice of the petrochemical industry, often due to the design of the process flow Unreasonable and huge economic losses.

In order to solve this problem, the resistance of the plate heat exchanger for cooling in the practical application of the petrochemical industry can be calculated and analyzed. According to the characteristics of the heat exchanger and the principle of heat conduction, the liquid phase on the wall surface increases linearly along the flow path to simulate the outflow The relationship between the length of the track, the actual mass gas content rate, and the volume gas content rate is close to the actual data. In the cooling process of the petrochemical industry, there is some concentrated condensation, which will form a liquid film on the heat exchange surface. Therefore, when a compact heat exchanger such as a plate-fin type can be used, to achieve a reasonable and economical heat exchanger, it must be Considering the adjustment of the heat exchanger from the perspective of structural parameters, it is not perfect to consider only the heat transfer area and the surplus.