天然气与石油2024，Vol.42Issue(3)：62-68,7.DOI:10.3969/j.issn.1006-5539.2024.03.010
天然气净化厂文丘里组合式急冷塔流场模拟与优化
Flow field simulation and optimization of combined Venturi quench tower in natural gas purification plants
摘要
Abstract
When the CONSOLV tail gas treatment unit is applied to treat high-temperature sulfur-containing flue gas in a natural gas purification plant,an annular corrosion ring has been observed about 30 cm above the spray water line of Venturi section of the combined Venturi quench tower.This study addresses the issue of equipment corrosion.Using computational fluid dynamics software the fluid dynamics,heat transfer,and mass transfer processes within the Venturi is simulated and analyzed.The corrosion mechanism is investigated,and optimization solutions are proposed.The cause of the corrosion is attributed to the formation of sulfuric acid when the high-temperature sulfur-containing gas comes into contact with water vapour during the cooling process.When the gas temperature drops below the sulfuric acid dew-point,high-concentration sulfuric acid droplets form,leading to severe acid corrosion on the inner wall of the 254SMo high alloy stainless steel equipment.According to the corrosion mechanism,the internal corrosion of Venturi segment cannot be completely resolved.An improvement strategy for corrosion mitigation involves changing the spray atomization effect or the spray angle of the nozzle.The research results can provide valuable reference for the design,operation and maintenance of similar quench towers with Venturi section.关键词
康索夫尾气处理装置/硫酸腐蚀/计算流体力学/流场模拟Key words
CANSOLV tail gas treatment unit/Sulfuric acid corrosion/Computational fluid dynamics/Flow field simulation引用本文复制引用
邱星城,谢晓玲,廖杰,李超群,刘其松,周明宇..天然气净化厂文丘里组合式急冷塔流场模拟与优化[J].天然气与石油,2024,42(3):62-68,7.基金项目
中国石油天然气股份有限公司低成本绿色地面工艺与设备关键技术研究项目"含硫天然气硫磺回收及氧化吸收尾气处理关键技术研究"(2021DJ2603) （2021DJ2603）
