The spiral plate heat exchanger has a good heat transfer effect, and is mainly composed of basic components such as a spiral heat transfer plate, a partition plate, a head cover and a connecting pipe. The centrifugal force generated by the flow of fluid in the spiral flow path causes the fluid to form a secondary circulation between the inside and outside of the flow path, increasing the disturbance. The spiral plate heat exchanger has the advantages of small volume, high efficiency, simple manufacture, low cost, and ability to carry out temperature difference heat transfer.
In recent years, spiral plate heat exchangers have been widely used in the domestic market, and manufacturing enterprises have formed a certain scale. At present, design and manufacturing technology has matured in China. Usually, the heat exchanger of the small and medium-sized ammonia plant and the heat exchanger of the lower part of the synthesis tower have replaced the shell-and-tube heat exchanger with a spiral plate heat exchanger. In the caustic soda plant's electrolyte heater and concentrated lye cooler, the equipment cost for using the spiral plate heat exchanger is only 1/3 of that of the shell-and-tube heat exchanger.
In addition to these advantages, good results can be achieved when the spiral plate heat exchanger is used for overhead condensation, quenching oil cooling, fuming sulfuric acid cooling, and fatty acid cooling. The spiral plate heat exchanger is best used for steam condensation and phase-free convective heat transfer, and can also be used for boiling heat transfer.