Scholarlink

<p>A three-tower, nine-step vacuum pressure swing adsorption (VPSA) process coupled with the partial flushing equalization (PFE) and natural aspiration/exhaust (NA/NE) technology was proposed and used for largest industrial-scale 80% oxygen production project in China in this study. The performance of the VPSA system during one whole year showed an obvious seasonal variation, being directly related to the atmosphere humidity and temperature. Correlation analysis between working condition and three performance indicators indicated that feed water and adsorber tower temperature exhibited highly similar linear profiles with respect to O<sub>2</sub> recovery and productivity, whereas contrary trend was observed for product flow rate. To achieve the relative constant product flow rate of 56,000 Nm<sup>3</sup>/h and O<sub>2</sub> purity of 83%, two approaches were used in the case of low temperature: decreasing the frequency of blower or increasing the vacuum level. Either way, the obtained higher adsorption/desorption pressure (P<sub>H</sub>/P<sub>L</sub>) ratio can indeed increase the O<sub>2</sub> purity. Moreover, the typical half-V-shaped profile of energy consumption with increase in adsorber temperature indicated that excessively high or low adsorber tower temperatures led to higher energy consumption. Although higher energy consumption was obtained for lower adsorber temperature of 21–30 ℃ in winter due to the NA process, the competitive energy consumption of 0.28–0.31 kWh/m<sup>3</sup> contributed to the economic feasibility of the three-tower, nine-step VPSA process for simultaneous achieving higher O<sub>2</sub> yield and lower energy consumption.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Performance and economic feasibility of industrial-scale oxygen production by three-tower VPSA process coupled with partial flushing equalization and natural aspiration/exhaust technology

  • 期刊论文

  • 发表日期：

    2026年2月9日

查看全文
  • Chen Ling,
  • Enjun Chen,
  • Yuyao Zhang,
  • Ziyang Niu,
  • Guangyu Yang,
  • Zanhua Chen,
  • Liuqiang Zhao,
  • Tong Yuan

摘要

A three-tower, nine-step vacuum pressure swing adsorption (VPSA) process coupled with the partial flushing equalization (PFE) and natural aspiration/exhaust (NA/NE) technology was proposed and used for largest industrial-scale 80% oxygen production project in China in this study. The performance of the VPSA system during one whole year showed an obvious seasonal variation, being directly related to the atmosphere humidity and temperature. Correlation analysis between working condition and three performance indicators indicated that feed water and adsorber tower temperature exhibited highly similar linear profiles with respect to O2 recovery and productivity, whereas contrary trend was observed for product flow rate. To achieve the relative constant product flow rate of 56,000 Nm3/h and O2 purity of 83%, two approaches were used in the case of low temperature: decreasing the frequency of blower or increasing the vacuum level. Either way, the obtained higher adsorption/desorption pressure (PH/PL) ratio can indeed increase the O2 purity. Moreover, the typical half-V-shaped profile of energy consumption with increase in adsorber temperature indicated that excessively high or low adsorber tower temperatures led to higher energy consumption. Although higher energy consumption was obtained for lower adsorber temperature of 21–30 ℃ in winter due to the NA process, the competitive energy consumption of 0.28–0.31 kWh/m3 contributed to the economic feasibility of the three-tower, nine-step VPSA process for simultaneous achieving higher O2 yield and lower energy consumption.