The sulfur recovery unit based on modified Claus process with split flow was simulated, so that the validation results showed satisfactory agreement with the refinery data. In this study, comprehensive investigation was carried out on various parameters of the unit. Concentration changes of compounds were investigated as the process stream passes along various equipment. Composite curves were generated, and the minimum approach temperature was calculated as one of the operational parameters of heat exchangers. Fluid condensation probability was investigated in catalytic reactors. The recovery of sulfur and the amount of sulfur production were calculated by process streams passing along catalytic reactors and condensers respectively. The most influential performance parameters including the fuel flow rate, combustion air flow rate, and bypasses fraction were considered as sensitivity analysis parameters, and their variation influences were investigated on the recovery of sulfur, the ratio of hydrogen sulfide to sulfur dioxide, the amount of produced steam, and the furnace outlet stream temperature. The optimal amounts for fuel flow rate and inlet air flow rate were calculated with the values of 0 and 202 mol/s, respectively, and according to the results, 15% of the mainstream flow rate gives the optimum amount of bypass fraction.

中文翻译：

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模拟，设备性能评估和灵敏度分析，作为硫回收装置的综合参数研究

模拟了基于改进的Claus工艺分流的硫磺回收装置，验证结果与炼厂数据吻合良好。在这项研究中，对装置的各种参数进行了综合研究。随着工艺流通过各种设备，研究了化合物的浓度变化。生成复合曲线，并计算最低进场温度作为热交换器的运行参数之一。在催化反应器中研究了流体冷凝的可能性。通过分别通过催化反应器和冷凝器的工艺物流来计算硫的回收率和硫的产生量。最有影响力的性能参数包括燃料流量，助燃空气流量，将旁路馏分和旁路馏分作为灵敏度分析参数，并研究其变化对硫的回收率，硫化氢与二氧化硫的比率，产生的蒸汽量以及炉膛出口温度的影响。分别以0和202 mol / s的值计算出燃料流量和进气流量的最佳量，并根据结果，主流流量的15％给出了旁路分数的最佳量。