介绍了加氢裂化装置加工高氯原料常见的产物热回收工艺方案。以某石化加氢裂化装置为例，对热高低分和冷高低分2种流程进行模拟计算，对比分析模拟结果发现，冷高低分流程和热高低分流程均能满足高氯原料加工需求，前者需要在NH₄Cl结盐温度以上设置间歇注水口，后者则需要在NH₄Cl结盐温度以上设置热高分器及间歇注水口。从能耗角度考虑，最优工况下热高低分流程较冷高低分流程加热炉负荷低11.0%；与热高低分流程相比，冷高低分流程含硫液化气、干气收率较高，并且冷高分气氢纯度高，外甩高分气、外补新氢量均低于热高分流程；从注水洗盐效果来说，冷高低分流程注水量比热高低分流程多42.6%，循环氢系统酸性气浓度较低，但脱硫塔顶气酸性气浓度较高，相应需要增加防腐蚀措施。综合考虑认为热高低分流程更具有优势。

Common heat recovery schemes for hydrocracking unit processing high chlorine-containing feedstock are described.In a case study of certain hydrocracking unit,the simulation calculation is made for the hot high/low pressure separator and cold high/low pressure separator schemes.Results show both schemes can process high chlorine-containing feedstock with certain special design.The cold high/low pressure separator scheme needs only an intermittent water injection before NH₄Cl decomposition,in contrast the hot high/low pressure separator scheme needs to set a hot high pressure separator in addition.In consideration of heat consumption,the load of heating furnace of hot high/low pressure separator scheme is 11.0% lower than that of cold high/low pressure separator scheme under the optimal conditions.In another aspect,the cold high/low pressure separator scheme can gain higher yield rates in both sulfur-containing liquefied petroleum gas and dry gas,and consumes less fresh hydrogen due to higher purity of hydrogen.From the aspect of water injection and salt solution,the cold high/low pressure separator scheme consumes 42.6% more desalting water than the hot high/low pressure separator scheme.A corrosion prevention measurement shall be adopted for the cold high/low pressure separator scheme because the concentration of acidic gases is higher in recycle hydrogen system but higher in acidic gas stripper.In a sum,hot high/low pressure separator scheme has more advantages.

黄舜尧(1993-),男,硕士生