Operating condition analysis of the microbubble and microdroplet dual-enhanced desulfurization reactor

doi:10.16085/j.issn.1000-6613.2023-1137

Abstract

Abstract:

Sinopec Engineering (Group) Company Luoyang R&D Center of Technology developed a microbubble and microdroplet dual-enhanced desulfurization reactor. The desulfurization reactor adopted microbubble and microdroplet enhanced absorption method, which changed the large millimeter bubbles in the desulfurization tower into microbubbles below 200µm, and changed the liquid flow mode from overflow to spray. The gas-liquid mass transfer efficiency was improved by this method, and the complexity of the desulfurization tower was simplified by using new internal components instead of the plates, and the reactor had a lower height than the plate tower. The effects of solvent height, absorption temperature and solvent circulation on purification efficiency were studied. The pressure drop at different solvent heights was also measured. The experimental results showed that the desulfurization reactor had low pressure drop and high desulfurization efficiency, and made the mass concentration of H₂S≤50mg/m³. When the flow rate of feed gas was 50m³/h, the best operating conditions could be: the solvent height was 800 mm, the absorption temperature was 40℃, and the solvent circulation was 0.8m³/h.

Key words: mass transfer, microbubble, alcohol-amine desulfurization, reactor, purification efficiency

摘要：

中石化炼化工程（集团）股份有限公司洛阳技术研发中心开发了微气泡和微液滴双强化脱硫反应器。该脱硫反应器采用微气泡和微液滴双强化手段改进吸收方式，将过去脱硫塔内毫米级的大气泡变为200µm以下的微气泡，将液体流动方式由溢流式变为喷淋式，提高了醇胺法脱硫的气液传质效率，并采用新型内构件代替塔板，简化了脱硫塔的复杂程度，相比板式吸收塔具有更小的高度。试验探究了新型脱硫反应器运行时，溶剂液位高度、吸收温度及溶剂循环量对净化效率的影响情况，并考察了不同溶剂液位高度下的压力降。结果表明：该脱硫反应器的压力降较小，脱硫效率较高，能够满足净化气H₂S质量浓度≤50mg/m³的要求；当原料气处理量为50m³/h时，最佳操作条件为溶剂液位高度800mm、吸收温度40℃、溶剂循环量0.8m³/h。

关键词: 传质, 微气泡, 醇胺法脱硫, 反应器, 净化效率

CLC Number:

TE992.1

SHENG Weiwu, CHENG Yongpan, CHEN Qiang, LI Xiaoting, WEI Jia, LI Linge, CHEN Xianfeng. Operating condition analysis of the microbubble and microdroplet dual-enhanced desulfurization reactor[J]. Chemical Industry and Engineering Progress, 2023, 42(S1): 142-147.

盛维武, 程永攀, 陈强, 李小婷, 魏嘉, 李琳鸽, 陈险峰. 微气泡和微液滴双强化脱硫反应器操作分析[J]. 化工进展, 2023, 42(S1): 142-147.

Figures/Tables 8

References 9

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