The Water Soluble Helium Extraction Technology Research in Single Well Geothermal Station

Helium is a kind of rare mineral resource on the earth, which is widely used in spacecraft launching, low temperature superconductivity, laser technology, infrared detect, nuclear industry, national defense and medical fields. Weihe basin is abundant with geothermal resources and high concentration soluble helium gas resources. Accordingly, it is significant to discuss the water soluble helium extraction and concentration techniques. Gas quality test in single well wellhead and gas extraction operation test, gas purification, dehumidification, gathering and storage experiment have been done successfully. The 85m3 of feed gases were collected and stored. Based on the studying, a comprehensive resource evaluation system of single well geothermal station with helium has been established. As well, the field test of soluble gas extraction, collection and storage technology in single well station was implemented. A serial of the innovational researches have been implemented, such as gas purification, dry gas gathering, highpressure membrane dehumidification and high-pressure gas gathering, single-well water soluble helium gas gathering and storage and etc. The experimental results indicated that it is feasible and effective to extract water soluble helium through gas and water separating and dehumidifying gas from low to high pressure and membrane separation, which has laid technical foundation for soluble helium resource concentration test, established a new industry chain and obtained the comprehensive economic benefits for geothermal resources development in the future.