In order to solve the problem of water carried during the separation and mining of supercritical carbon dioxide in CO_2 plume geothermal power generation system

the absorption and separation characteristics of the three-dimensional tube-shell hollow fiber membrane were analyzed by numerical simulation method

and the coupled substance transport model

porous medium model and absorption mathematical model were established

and the influence of different design parameters of the separator on the separation efficiency was studied. The simulation results show that

when the inlet velocity of the mixture increases from 0.01 m/s to 0.20 m/s

the separation efficiency decreases from 95.76% to 56.91%. The separation efficiency increases with the tube length

but decreases when increasing the tube radius. It is found that when the inlet velocity of the mixture is greater than 0.05 m/s

the separation efficiency of the countercurrent arrangement is gradually higher than that of the downstream arrangement. When increasing the number of membrane tubes in the membrane separator

the separation efficiency relatively gradually reduces

and that of the single membrane tube is the highest.