| Abstract |
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. Thus, water soluble helium extraction and concentration techniques were discussed, single well wellhead gas quality test and gas extraction operation test were carried out, gas purification, dehumidification, gathering and storage experiment were finished, and 85m3 feed gases were collected and stored. Based on the studying, a comprehensive resource evaluation system of single well geothermal station with helium was established, soluble gas extraction and collection and storage technology field test in single well station was implemented, and a serial of the innovational research on gas purification, dry gas gathering, high-pressure membrane dehumidification and high-pressure gas gathering were carried out and single-well water soluble helium gas gathering and storage was implemented. The experimental results indicated that it is feasible and effective to extract water soluble helium by 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, and established a new industry chain and comprehensive economic benefits improvement for geothermal resources development in the future. |