Abstract: This article takes the domestically produced wound tube feed heat exchanger of the reforming unit as an example, and compares and analyzes its hot end temperature difference and total pressure drop on the tube shell side with the plate shell heat exchanger under the same load conditions. The results show that under the same load conditions, the temperature difference at the hot end of the coiled tube heat exchanger is reduced by 35 ℃ compared to the plate shell heat exchanger, the total pressure drop of the tube shell side is reduced by 70 kPa, the consumption of 3.5 MPa steam and fuel gas in the device is significantly reduced, and the gas consumption is saved by about 4355t/a, saving costs equivalent to 12.90 million yuan/a. Based on the successful application of coiled tube heat exchangers and similar cases of similar devices in China, a long-term operation strategy for coiled tube heat exchangers is further proposed.

Key words: continuous catalytic reforming unit, wrapped tube heat exchanger, hot end temperature difference, energy-saving