针对高碳硫比的酸性天然气的净化，提出了一种耦合酸气提浓的脱硫脱碳新工艺. 以某高碳硫比原料气为例，采用PROMAX和AMSIM模拟软件进行工艺模拟和参数分析. 结果表明，二级闪蒸压力为300 kPa、闪蒸温度为118℃时，闪蒸气量和二次吸收塔顶的尾气量均较大，再生后的酸气浓度较高，能耗比常规工艺低. 该工艺在满足产品质量要求的同时能将再生后的酸气浓度由20.65vol%提升至30.16vol%，提高了天然气处理单元操作的稳定性，降低了一次性投资和操作运行成本.
Desulfuration and decarburization coupling acid gas enrichment was posed an advancing and promising process for sour natural gas with high carbon/sulfur ratio. Though an example of high carbon/sulfur ratio sour natural gas, the PROMAX and AMISIM were used to simulate the process and analyze the parameters. The results showed that the flow rate of flash gas, tail gas from 2nd absorber and the H2S concentration of acid gas was higher and the energy consumption was lower than traditional process at the flash pressure of 300 kPa and the temperature of 118℃. Also, the new process not only was satisfied with the specification of sales gas but also enriched the H2S concentration of acid gas from 20.65vol% to 30.16vol%, which can enhance the stability operation, decrease the investment and the operating cost.
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