真空变压吸附法纯化氦的实验研究
Experimental study on helium purification using vacuum pressure swing adsorption
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- 引用格式:
-
李均方,张瑞春,何伟,何琳琳.真空变压吸附法纯化氦的实验研究[J].天然气与石油,2025,43(6):10-15.doi:10.3969/j.issn.1006-5539.2025.06.002
LI Junfang, ZHANG Ruichun, HE Wei, HE Linlin. Experimental study on helium purification using vacuum pressure swing adsorption[J].Natural Gas and Oil,2025,43(6):10-15.doi:10.3969/j.issn.1006-5539.2025.06.002
- DOI:
- 10.3969/j.issn.1006-5539.2025.06.002
- 作者:
- 李均方 张瑞春 何伟 何琳琳
LI Junfang, ZHANG Ruichun, HE Wei, HE Linlin
- 作者单位:
- 中国石油西南油气田公司成都天然气化工总厂, 四川 成都 610213
Chengdu Natural Gas Chemical Works, PetroChina Southwest Oil & Gasfield Company, Chengdu, Sichuan, 610213, China
- 关键词:
- 变压吸附;粗氦纯化;吸附剂;氖
Pressure swing adsorption; Crude helium purification; Adsorbent; Neon
- 摘要:
为推广变压吸附法的工程化应用,更好地满足天然气提氦对粗氦纯化的潜在需求,采用常用的商业吸附剂和成熟的变压吸附工艺,对某装置的粗氦原料气进行了变压吸附实验研究。采用真空变压吸附法实现氦与氧、氮杂质的分离,考察了吸附时间对杂质含量、氦收率以及杂质浓缩倍数的影响。以中等硅铝比分子筛吸附剂Ⅰ和低等硅铝比分子筛吸附剂Ⅱ为材料,设计处理气量 ≤2 m3/h、操作压力≤2 MPa时,低等硅铝比分子筛吸附剂Ⅱ的产品氦气满足99.999%高纯氦中氧氮杂质要求(氧含量≤1×10-6、氮含量≤2×10-6),氦收率约75%~80%,氧、氮杂质浓缩规律相同。以氢纯化用沸石类吸附剂为主的吸附剂体系可用于变压吸附纯化氦,沸石类吸附剂对氧的吸附能力远低于对氮的吸附能力,实际应用过程中应选择对杂质吸附容量更大的吸附剂,以保证产品质量。采用真空变压吸附法可实现氦与氧、氮杂质的有效分离。研究结果为粗氦纯化装置建设的工艺选择提供了指导和数据支撑。
In order to promote the engineering application of the pressure swing adsorption(PSA) method, and better meet the potential demand for crude helium purification from natural gas, experimental studies were conducted using commonly available commercial adsorbents and a mature PSA process on the crude helium from a specific facility. The vacuum pressure swing adsorption(VPSA) method was used to achieve the separation of helium from oxygen and nitrogen impurities. The effects of adsorption time on the content of oxygen and nitrogen impurities, helium yield and the concentration ratio of oxygen and nitrogen impurities were investigated. Using medium Si/Al ratio molecular sieve adsorbentsⅠand low Si/Al ratio molecular sieve adsorbentsⅡas materials, with a feed gas rate of ≤2 m3/h and an operating pressure of ≤2 MPa, the helium product from adsorbent II met the impurity specifications for 99.999% high-purity helium(O2 content is less than 1×10-6, N2 content is less than 2×10-6), with a helium yield of about 75%~80%. Oxygen and nitrogen exhibited similar concentration behavior. Adsorbent systems mainly composed of zeolite adsorbents for hydrogen purification can also be used for helium purification via PSA. Since zeolite adsorbents have a much lower adsorption capacity for oxygen than for nitrogen, adsorbents with higher impurity adsorption capacities should be selected in practical applications to ensure product quality. The VPSA method can realize the effective separation of helium from oxygen and nitrogen impurities. This experimental study provides guidance and data support for the process selection in the construction of crude helium purification facilities.
