Helium is a precious gas that is widely used in various industrial fields. It is mainly extracted from natural gas reservoirs. However, the volume fraction of helium in natural gas is usually lower than 0.3%, which makes the extraction process complicated and expensive. Current methods of extracting helium from natural gas have some problems, such as complicated processes, high energy consumption and high cost. Therefore, a new method of helium extraction, an improved cryogenic process combined with a 2-bed 6-step pressure swing adsorption process, is proposed in this paper, which improves the cryogenic process and purifies helium by a pressure swing adsorption method. The process is very simple, and the returned LNG serves as the cold source of cold boxes, which can reduce the amount of nitrogen circulation and greatly reduce the cost. Through the study and optimization of key parameters in the procedure, the energy consumption of the cryogenic process is reduced by 31.6%, and the helium concentration in the helium product reaches 99.999%.

中文翻译：

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从天然气中高效提取粗氦并提纯的新工艺

氦气是一种珍贵气体，广泛应用于各个工业领域。主要从天然气藏中提取。然而，天然气中氦的体积分数通常低于0.3%，这使得提取过程复杂且昂贵。目前从天然气中提取氦气的方法存在工艺复杂、能耗高、成本高等问题。因此，本文提出一种氦气提取新方法，即改进深冷工艺结合2床6步变压吸附工艺，改进深冷工艺，采用变压吸附法提纯氦气。流程非常简单，返回的LNG作为冷箱的冷源，可以减少氮气循环量，大大降低成本。通过工艺中关键参数的研究和优化，深冷工艺能耗降低31.6%，氦产品中氦气浓度达到99.999%。