吸附及解吸壓力對快速變壓吸附床內速度及循環性能的影響

祝顯強; 劉應書; 楊雄; 劉文海; 李永玲

doi:10.13374/j.issn2095-9389.2016.07.015

吸附及解吸壓力對快速變壓吸附床內速度及循環性能的影響

doi: 10.13374/j.issn2095-9389.2016.07.015

祝顯強^1,2,
劉應書^1,3,
楊雄^1, ,,
劉文海¹,
李永玲¹

1. 北京科技大學能源與環境工程學院, 北京 100083;
2. 江蘇昊泰氣體設備科技有限公司, 丹陽 212300;
3. 北京科技大學冶金工業節能減排北京市重點實驗室, 北京 100083

基金項目:

應急救生呼吸裝備關鍵技術及產業化資助項目(Z141100000714007)

國家自然科學基金資助項目(51306017)

詳細信息

通訊作者:
楊雄,E-mail:kindy_yang@163.com

中圖分類號: TQ028.1
計量
- 文章訪問數: 253
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- PDF下載量: 18
- 被引次數: 0
出版歷程
- 收稿日期: 2016-01-11
- 網絡出版日期: 2021-07-22

Effect of adsorption and desorption pressure on the velocity and cycling performance of rapid pressure swing adsorption

1. School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China;
2. Jiangsu Oxtek Air Equipment&Technology Co. Ltd., Danyang 212300, China;
3. Beijing Key Laboratory for Energy Saving and Emission Reduction of Metallurgical Industry, University of Science and Technology Beijing, Beijing 100083, China

摘要

摘要: 快速(真空)變壓吸附循環周期較短,床層壓力周期性變化快,使吸附床內流動及傳熱傳質特性變化較大,本文研究吸附及解吸壓力對快速變壓吸附制氧床內速度及循環性能的影響.快速變壓吸附(rapid pressure swing adsorption,RPSA)循環中原料氣充壓階段氣流速度遠大于順流的氣體流速極限值,快速真空變壓吸附(rapid vacuum pressure swing adsorption,RVPSA)循環中原料氣充壓階段氣流速度略大于順流的氣體流速極限值,而RPSA循環和RVPSA循環中放空降壓階段氣流速度均較大.在所研究的吸附和解吸壓力范圍內,RPSA循環和RVPSA循環中氣體溫度在循環周期內變化均約為10℃,而RVPSA循環中氣體溫度在循環周期內溫度梯度更大.RPSA循環中吸附壓力越高,氧氣回收率越高,床層因子越小;而RVPSA循環中解吸壓力越低,氧氣回收率越高,床層因子越小.
- 制氧 /
- 變壓吸附 /
- 壓力 /
- 循環性能 /
- 數值模擬
Abstract: Rapid(vacuum) pressure swing adsorption(RPSA or RVPSA) is featured by short cycle time and quick pressure change,which may lead to great variations of flow and mass and heat transfer in the adsorber. The effects of adsorption and desorption pressure on the velocity and cycling performance in an oxygen-production RPSA bed were investigated in this paper. The results show that during the feed pressurization(PR) step in the RPSA process,the up-flow velocity is far larger than the limit value,and slightly larger than it for the rapid vacuum pressure swing adsorption(RVPSA) process. During the blow-down step in both RPSA and RVPSA,the down-flow velocity is greater than the limit value. In comparison to RPSA,RVPSA exhibits a similar gas temperature change around 10℃ but a larger gas temperature gradient. The bed size factor can be effectively reduced with increased oxygen recovery by increasing the adsorption pressure for RPSA,while by lowering the desorption pressure for RVPSA.
- oxygen generation /
- pressure swing adsorption /
- pressure /
- cycling performance /
- numerical simulation