Abstract: With the rapid development of economy and industrialization, environmental pollution has become an increasingly serious problem. So it is an imperative trend to develop green energy industry. For this end, SINOPEC has brought in S Zorb technology and improved the technology after having purchased the patent right. This paper summarizes the design experience of several heating furnace in S Zorb unit. It is found that the thermal efficiency of the heating furnace can be improved and the operating cost of enterprises can be reduced by adding waste heat recovery system, replacing the preheater form, and modifying some of the furnace tube diameters. In addition, the design of S Zorb unit can be further improved by dealing with on-site problems and analyzing the causes of the problems.

Key words: S Zorb unit, heating furnace, optimization design, energy efficiency, negative pressure fluctuation