文献类型：期刊文献

中文题名：螺旋管式气提与废碱液中和工艺模拟研究

英文题名：Study on simulation of neutralization process and spiral stripper for treatment of spent caustic

作者：宋健健[1];王硕[2];许萧[2]

机构：[1]中国石化工程建设有限公司,北京100101;[2]华东理工大学机械与动力工程学院,上海200237

年份：2023

卷号：52

期号：S2

起止页码：27

中文期刊名：应用化工

外文期刊名：Applied Chemical Industry

收录：北大核心:【北大核心2020】；CSCD:【CSCD_E2023_2024】；

基金：国家自然科学基金(21908057);上海教育发展基金会和上海市教育委员会(20CG39)的“晨光计划”资助。

语种：中文

中文关键词：废碱液;中和;螺旋管式气提器;工艺模拟;流场计算

外文关键词：spent caustic;neutralization;spiral stripper;process simulation;computational fluid

摘要：采用工艺流程模拟手段研究串联注酸流量对pH的影响关系,采用耦合传质的流体力学模拟手段研究载气流量对溶解性二氧化碳残留浓度的影响关系。结果表明,注酸流量与废碱液的pH呈非线性关系,当pH<6时,pH随注酸流量增加而急剧下降;第一级注酸比0.077、第二级注酸比0.027,可以将液体pH控制在3.5左右。注气流量越大,底部附近的溶解性二氧化碳质量分数越小,当表观气速超过0.028 m/s时,残留溶解性二氧化碳浓度小于1 ppm。螺旋导流管式气提器的气液分布和气液传质效果良好,可以在比较低的载气消耗条件下有效脱除液体中的溶解性二氧化碳组分。
The process flow simulation method is used to study the influence of acid injection flow on pH of liquid.The hydrodynamics simulation method coupled with gas liquid mass transfer is used to study the influence of injected air flow on the residual concentration of dissolved carbon dioxide.The results show that there is a nonlinear relationship between acid injection flow and pH of liquid.When pH is less than 6,pH decreases sharply with the increase of acid injection flow.The first stagewith acid-water ratio of 0.077 and the second stage withacid-water ratio of 0.027 can lead to the liquid pH at about 3.5.More gas injected into spiral stripper,the smaller the mass fraction of dissolved carbon dioxide near the bottom was achieved.When the superficial gas velocity exceeds 0.028m/s,the residual dissolved carbon dioxide concentration in liquid is less than 1ppm.The spiral stripperexhibits astable gas-liquid distribution and a well gas-liquid mass transfer.The effectively for removing the dissolved carbon dioxide from the liquid is sufficient with reasonable carrier gas consumption.