Abstract: As a new type of heat exchanger with high heat transfer coefficient, the spiral wound heat exchanger has been widely used in industrial fields in recent years.The article introduces the application of the spiral wound heat exchanger in pyrolysis gasoline hydrogenation plant of a Refining and Chemical Company, and analyzes the advantages and disadvantages during the operation. After being put into production, the plant has further realized energy conservation and environmental protection, making the second-stage hydrogenation reaction process more simple and convenient.the plant can save 1.89 million yuan in operating costs every year, and the economic benefits are significant.

Key words: spiral wound heat exchanger, pyrolysis gasoline, hydrogenation, application