Experimental Investigation of a Cryogenic Filter for Separating Solid Carbon Dioxide Particles from Liquid Nitrogen

• Published in: Shanghai jiao tong da xue xue bao Vol. 14; no. 1; pp. 25 - 28
• Main Author: 李娟 石玉美 汪荣顺 李祥东
• Format: Journal Article
• Language: English
• Published: Heidelberg Shanghai Jiaotong University Press 01.02.2009
• Subjects: Architecture; Computer Science; Electrical Engineering; Engineering; Life Sciences; Materials Science; 二氧化碳浓度; 低温; 实验; 液氮; 烧结金属丝网; 碳颗粒; 筛网过滤器; 过滤分离; TQ 028.5; filtration efficiency; pressure drop; metallic wire-mesh filter; TB 66; cryogenic liquid
• ISSN: 1007-1172; 1995-8188
• DOI: 10.1007/s12204-009-0025-3

This paper presents an investigation of a new method of purifying cryogenic liquid using sintered metallic wire-mesh filter, which has the advantages of high purifying efficiency and preferred strength at absolutely low temperature. Experiments are conducted to purify solid CO2 particles from liquid nitrogen. Temperature and pressure in the upstream and downstream of the filter, and the flow rate of carbon dioxide （CO2） gas and liquid nitrogen are measured, with the gas content of filtrate analyzed using a CO2 concentration detector. It is illustrated that after filtration, the purity of liquid nitrogen （volume fraction） is higher than 99.99%, which means that the volume fraction of CO2 is less than 0.01%. Effects of operation parameters on the performance of the filter, such as pressure drop Ap and filtration efficiency E are analyzed quantitatively. The present conclusions will provide a guideline to the optimumal design and operation of sintered metallic wire-mesh filter in cryogenic application.