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| 不同均压方式对PSA和VSA空分制氧过程的影响 | |
| 引用本文： | 杨彦钢,丁艳宾,马正飞,赵春风.不同均压方式对PSA和VSA空分制氧过程的影响[J].南京工业大学学报(自然科学版),2012,34(4):79-83. |
| 作者姓名： | 杨彦钢 丁艳宾 马正飞 赵春风 |
| 作者单位： | 1. 南京工业大学化学化工学院,材料化学工程国家重点实验室,江苏南京210009 2. 上海穗杉实业有限公司,上海,201500 3. 中国石化集团南京工程有限公司,江苏南京,211112 |
| 基金项目： | 长江学者和创新团队发展计划资助项目，江苏省高校自然科学重大基础研究资助项目 |
| 摘 要： | 对存在于变压吸附（PSA）和真空变压吸附（VSA）空分制氧过程中的均压步骤进行研究,应用ASPENADSIM软件,模拟并比较4种不同均压方式（塔顶向塔顶均压（T-T）,塔底向塔底均压（B-B）,塔顶和塔底双向均压（TB）,塔顶向塔底均压（T-B））对过程的影响,分析均压步骤的物流浓度、流量以及均压结束时床层轴向浓度分布。结果表明:采用T-B均压方式的PSA和VSA过程得到的产品O2纯度和收率最高。在均压步骤,均降床层塔顶出气有利于死空间中O2的回收,且减少床层吸附相中N2的脱附带出,从而得到较高的产品O2收率;均升床层塔底进气可使床层N2的质量摩尔浓度前沿陡峭,塔顶洁净,因此得到较高的产品O2纯度。 |
| 关 键 词： | PSA VSA 制氧 模拟 均压方式 ASPEN-ADSIM |
Effects of different pressure equalization methods on PSA and VSA processes for O2 production from air |
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| YANG Yangang , DING Yanbing , MA Zhengfei , ZHAO Chunfeng.Effects of different pressure equalization methods on PSA and VSA processes for O2 production from air[J].Journal of Nanjing University of Technology,2012,34(4):79-83. | |
| Authors: | YANG Yangang DING Yanbing MA Zhengfei ZHAO Chunfeng |
| Institution: | 1.State Key Laboratory of Materials-Oriented Chemical Engineering,College of Chemistry and Chemical Engineering, Nanjing University of Technology,Nanjing 210009,China;2.Shanghai Suishan Industrial Co.,Ltd., Shanghai 201500,China;3.Sinopee Nanjing Engineering and Construction Incorporation,Nanjing 211112,China) |
| Abstract: | The pressure equalization step in O2 production from air of pressure swing adsorption（PSA） and vacuum swing adsorption（VSA）processes was studied.Influences of four different pressure equalization modes（the two beds connected by top to top（T-T）,bottom to bottom（B-B）,top and bottom both sides（TB）,top to bottom（T-B））on O2 production from air were simulated by ASPEN-ADSIM.Accordingly, the O2 concentration and flowrate of the stream in the pressure equalization step and the bed concentration profiles at the end of pressure equalization step were investigated.Results showed that PSA and VSA processes adopting,the pressure equalization mode of T-B had the highest O2 purity and O2 recovery.During pressure equalization step,opening the outlet end of bed 1（experiencing the step of depressurizing pressure equalization）to discharge gas benefit the increasing of O2 recovery of product,but opening the inlet end of bed 2（experiencing the step of pressurizing pressure equalization）to let gas in from bed 1 had the benefit to increasing O2 purity of product. |
| Keywords: | PSA VSA O2 product simulation pressure equalization ASPEN-ADSIM |
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