文丘里组合式急冷塔腐蚀原因分析与控制措施探讨
Analysis of corrosion causes and discussion on control measures for combined Venturi quench tower
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- 引用格式:
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鲜宁,施辉明,罗林林,汤国军,易思,荣明,徐广森,殷鹏. 文丘里组合式急冷塔腐蚀原因分析与控制措施探讨[J].天然气与石油,2026,44(1):94-101.doi:10.3969/j.issn.1006-5539.2026.01.012
Xian Ning, Shi Huiming, Luo Linlin, Tang Guojun, Yi Si, Rong Ming, Xu Guangsen, Yin Peng.Analysis of corrosion causes and discussion on control measures for combined Venturi quench tower[J].Natural Gas and Oil,2026,44(1):94-101.doi:10.3969/j.issn.1006-5539.2026.01.012
- DOI:
- 10.3969/j.issn.1006-5539.2026.01.012
- 作者:
- 鲜宁1 施辉明1 罗林林2 汤国军1 易思2 荣明1 徐广森3 殷鹏3
Xian Ning1, Shi Huiming1, Luo Linlin2, Tang Guojun1, Yi Si2, Rong Ming1, Xu Guangsen3, Yin Peng3
- 作者单位:
- 1. 中国石油工程建设有限公司西南分公司, 成都 610041; 2. 中国石油西南油气田公司天然气净化总厂, 重庆 401147; 3. 大庆油田有限责任公司天然气分公司, 黑龙江 大庆 163411
1. CPECC Southwest Company, Chengdu, 610041, China; 2. Natural Gas Purification Plant General, PetroChina Southwest Oil & Gasfield Company, Chongqing, 401147, China; 3. Daqing Oilfield Limited Company Natural Gas Branch, Daqing, Heilongjiang, 163411, China
- 关键词:
- 文丘里组合塔;烟气;硫酸;腐蚀
Combined Venturi quench tower; Flue gas; Sulfuric acid; Corrosion
- 摘要:
某含硫气田的尾气净化中引进康索夫尾气处理工艺,投产后文丘里组合式急冷塔出现了严重腐蚀问题,影响了净化厂的正常运行。为解决现场的腐蚀问题,依托某净化厂的工艺参数,采用工况模拟、理论分析以及现场验证的方式对腐蚀原因及其主要的腐蚀控制因素进行了分析,并对腐蚀控制措施进行探讨和应用验证。研究表明，塔壁腐蚀由于稀硫酸雾滴与高温烟气热交换后形成高温高浓度硫酸,高温高浓度的硫酸雾滴冲击254SMo高合金奥氏体不锈钢塔壁,致使塔壁环向出现一条较窄的腐蚀凹槽。改良设备结构,通过液膜降低塔壁温度同时避免稀硫酸浓缩,可有效解决设备腐蚀问题;对于在役设备,采取局部内衬耐热耐腐蚀的材质可有效改善设备腐蚀问题。研究结果可为类似文丘里组合式急冷塔的设计选材提供参考。
The Cansolv exhaust treatment process was introduced for exhaust purification in a sour gas field. The combined Venturi quench tower suffered serious corrosion after commissioning, affecting the normal operation of the purification plant. In order to address the corrosion issue on site, the corrosion mechanism and major influencing factors were investigated by simulating operation conditions, theoretical analysis and on-site verification based on the process parameters. The control measures were discussed based on the major corrosion control factors, and theirs application effectiveness was evaluated. The research result showed that the tower wall was corroded by high-temperature, high-concentration sulfuric acid droplets formed through heat exchange between dilute acid mist and high-temperature flue gas, which impacted the tower wall circumferentially. Consequently, a narrow circumferential corrosive groove formed on the 254SMo high-alloy austenitic stainless steel tower wall. Improving the equipment structure by reducing the tower wall temperature through a liquid film to avoid dilute acid concentration can effectively migigate the equipment corrosion. For in-service equipment, locally lining the tower with heat-resistant and acid-resistant materials can effectively alleviate corrosion. The research results provide a reference for the design and material selection of the similar combined Venturi quench tower.
