Core Insights - Anhui Wanrui Cold Electric Technology Co., Ltd. has developed a low-temperature refining and neon removal device that achieved helium purity of 99.99997% (6N9 grade) at a natural gas helium extraction project site in Yan'an, Shaanxi [1] - This device is the first of its kind in China to extract ultra-pure helium from natural gas, marking a significant breakthrough in the low-abundance natural gas helium extraction field [1] - Helium is a non-renewable strategic resource essential in various fields such as large scientific installations, advanced medical applications, and aerospace, often referred to as the "blood of industry" [1] Technology and Process - The research team has pioneered a new "combined method" helium extraction process that integrates four stages: hydrogen removal, membrane separation, pressure swing adsorption, and low-temperature refining [1] - The process begins with catalytic hydrogen removal to enrich helium, followed by membrane separation and pressure swing adsorption to eliminate nitrogen, methane, and other impurities, and concludes with a 30K deep low-temperature refining process to remove neon impurities [1] Operational Capacity - The device can operate continuously for 24 hours without downtime, with an annual extraction capacity of 400,000 cubic meters of high-purity helium [2]

据科技日报18日报道，近日，安徽万瑞冷电科技有限公司（简称"万瑞冷电"）自主研制的低温精制及脱 氖装置在陕西延安天然气提氦项目现场完成工程验收。该装置产出氦气纯度达到99.99997%（6N9 级），氖气杂质含量低于0.3ppm。作为国内首套从天然气中提取6N9级超纯氦气的装置，这一成果标志 着我国在低丰度天然气提氦领域实现了重大突破。 作为一种不可再生的战略资源，氦气因其独特的超低温特性和化学惰性，在大科学装置、尖端医疗及航 空航天等领域发挥着至关重要的作用，被誉为"工业血液"。然而，我国天然气田氦气平均丰度仅为 0.03%—0.05%，远低于国际富氦气田1%—7%的水平，"贫氦"特性使得我国传统提氦技术效率低下，纯 度难以突破99.9999%关口。 据了解，研发团队在国内首创了新型"联合法"提氦工艺体系。该工艺体系创新融合了脱氢、膜分离、变 压吸附、低温精制的四阶耦合工艺。首先通过催化脱氢技术脱除氢气杂质实现氦气初步富集，然后经过 膜分离+变压吸附深度脱除氮气、甲烷等主要杂质，最后采用30K深低温精制工艺，精准脱除氖气杂 质，获取超纯氦气产品。这套装置可实现24小时不停机连续运行，每年提取高纯氦气40万立 ...