SYSTEM FOR EXTRACTING HELIUM FROM HELIUM-POOR NATURAL GAS AND CO-PRODUCING MULTIPLE PRODUCTS, AND METHOD

• Main Authors: SHI, Daohan, QIU, Peng, HAN, Wanlong, ZHU, Guocheng, BAN, Xingan, SU, Haiping, LIN, Liang, LIU, Jie, ZHAO, Yujun, LI, Shuhua, HUANG, Jie, WANG, Denghai, WANG, Nianrong, LIU, Feng, CHANG, Zhibo, ZHANG, Wenchao, LI, Jingzi, YU, Haojie, WANG, Chunyan, LIU, Zibing, FAN, Junlai, GUO, Yongqiang, LIU, Yinchun, LIANG, Xuanji
• Format: Patent
• Language: Chinese; English; French
• Published: 22.02.2024
• Subjects: BLASTING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; HEATING; LIGHTING; LIQUEFACTION SOLIDIFICATION OF GASES; LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS; MANUFACTURE OR STORAGE OF ICE; MECHANICAL ENGINEERING; MIXTURES BY PRESSURE AND COLD TREATMENT; REFRIGERATION OR COOLING; WEAPONS

A system for extracting helium from helium-poor natural gas and co-producing multiple products, and a method. The system comprises: a primary refrigeration device (11), a primary cryogenic separator (9), a pre-denitrogenation column (26), a demethanizer (51), a secondary refrigeration device (72), a helium extraction column (75), a denitrogenation column (98), etc. Rectification and separation of nitrogen, methane, ethane and propane are carried out in ascending order of the boiling points of components, nitrogen and methane are separated by using the pre-denitrogenation column (26), and nitrogen and helium are separated by means of low-temperature rectification. La présente invention concerne un système d'extraction d'hélium présent dans un gaz naturel pauvre en hélium et de coproduction de multiples produits, et procédé. Le système comprend : un dispositif de réfrigération primaire (11), un séparateur cryogénique primaire (9), une colonne de pré-dénitrogénation (26), un déméthaniseur (51), un dispositif de