Abstract: Hydrogenation burner is the key equipment of tail gas treatment unit. If local over temperature occurs on the shell, it will influence the safe operation of the device greatly. After determining the direct causes of the over temperature of the shell, this paper discusses the influence of higher temperature of the combustion chamber on the over temperature of hydrogenation burner shell from two aspects covering air distribution ratio of the combustion chamber and cooling steam flow value.

Key words: over temperature, air distribution ratio, cooling steam flow