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首页> 外文期刊>Applied thermal engineering: Design, processes, equipment, economics >Dual-stage acid gas combustion to increase sulfur recovery and decrease the number of catalytic units in sulfur recovery units
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Dual-stage acid gas combustion to increase sulfur recovery and decrease the number of catalytic units in sulfur recovery units

机译：双级酸气体燃烧以增加硫回收率，降低硫恢复单元中的催化单元数量

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摘要

Sulfur compounds in crude oil and gas are absorbed as acid gas (H2S and CO2), and converted to sulfur in sulfur recovery units (SRUs). To meet environmental standards, SRUs must achieve sulfur recovery efficiency (SRE) near 9899.99%. The existing technologies for high SRE induce high costs to the economically deficient SRUs. To reduce their operating cost, a process modification is proposed that increases SRE and reduces the number of expensive catalytic units. The modification involves dual-stage acid gas combustion occurring in two Claus furnaces along with the intermediate withdrawal of sulfur and H2O. The conventional and the modified thermal sections are simulated using industrial plant data and a detailed reaction mechanism. The SRE in the thermal section increased from 63% with the conventional process to 75% with the modified process. To determine the overall efficiency, the 2-stage and 3-stage catalytic units combined with the conventional and modified thermal sections are simulated. The overall SRE of the modified thermal section with 2-stage catalytic unit was higher than that of the conventional thermal section with 3-stage catalytic unit, which indicates that the number of catalytic units and the operating cost of SRUs can be reduced with the suggested process modifications.y
机译：原油和气体中的硫化合物被酸性气体（H 2 S和CO 2）吸收，并转化为硫回收单元（SRU）的硫。为了满足环境标准，SRU必须达到9899.99％的硫磺恢复效率（SRE）。高级SRE的现有技术促使高成本高于经济缺陷的SRU。为了降低其运营成本，提出了一种增加SRE并减少昂贵的催化单元的数量。该改性涉及在两个克劳斯炉中发生的双级酸气体燃烧以及硫和H2O的中间撤离。使用工业植物数据和详细的反应机制模拟常规和修饰的热部分。热截面中的SRE随着修饰过程的常规方法从63％增加到75％。为了确定整体效率，模拟了与常规和修饰的热部分相结合的2级和3级催化单元。用2级催化单元的改性热部分的总体SRE高于3-阶段催化单元的传统热部分，表明催化单元的数量和SRU的运营成本可以减少流程修改

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