S Zorb process is a desulphurization technology for clean fuel production,the energy utili-zation of the whole device can yet be further improved. In this paper,pinch technology was used to ana-lyze the S Zorb process in a refinery with the help of the grand composite curve. The results indicate that the device consumes overmuch utility,energy saving potential can be about 24%,and meanwhile, the problem of high energy for low energy situation exists in the pockets of the grand composite curve. Two optimization schemes are proposed. In the first scheme,furnace is retained and medium pressure steam is generated as a byproduct,which realizes the cascade utilization of energy,resulting in a benefit of 10.442 million RMB per year. The other scheme is to remove the furnace which leads to the less con-sumption of fuel gas with a benefit of 10.662 million RMB per year. Both the schemes have low retrofit-ting costs and short payback periods. A large amount of energy can be saved which contributes to con-siderable economic benefits.%S Zorb 脱硫工艺为一项清洁燃料生产技术，但整个装置的用能还有改进的潜力。对某炼油厂 S Zorb 装置采用夹点技术，以总复合曲线为工具进行了分析，发现其装置用能既在数量上多消耗了公用工程，节能潜力为24％左右，同时，在总复合曲线上的“口袋”内还存在高能低用的问题。提出了两个优化方案：一个方案保留加热炉，副产中压蒸汽，实现了能量的梯级回收利用，其年净效益约1044.2万元；另一个方案取消加热炉，节省燃料气，其年净效益约1066.2万元。两个方案改造费用均较低，回收期短，可获得明显的节能效果和经济效益。
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