SIMULATION ANALYSIS ON REGULATION METHODS FOR 99.9％ OXYGEN PRODUCTION WITH AN METALLURGICAL ASU
In order to ensure the quality of electric steel production, the nitrogen concentration of the oxygen for convertor production must be controlled below 15ppm, which demands that the oxygen purity of the low pressure column of an air separation unit (ASU) is kept equal or above 99.9％. This paper developed a rate-based nonequilibrium model to simulate and optimize the process of 6＃ ASU, 60000Nm3/h, of Bao Steel Inc., China. The model is based on Peng-Robinson state equations which describe the gas-liquid equilibrium relationship among O2-Ar-N2. Based on the simulation of the 6＃ ASU under design and off-design conditions, three combined regulation methods are suggested to obtain 99.9％ oxygen and maintain other products’ purity and output simultaneously. The following effects are achieved: obtaining 99.9％ high-purity oxygen; keeping the purity of nitrogen above 99.99％; increasing the argon content in argon fraction to improve argon output.
Xinfang JIN Li WANG Shufeng SUN Lige TONG
University of Science and Technology, Beijing, School of Mechanical Engineering,Department of Thermal Engineering, P. O. BOX 645 Xueyuan Road No.30, Haidian District, Beijing, 100083, China
国际会议
The 22nd International Congress of Refrigeration(第22届国际制冷大会)
北京
英文
2007-08-21（万方平台首次上网日期，不代表论文的发表时间）