| Popis: |
A type of novel solvent absorption method using propyl ether as absorbent was proposed, which the coalbed methane (CBM) was concentrated and simulated in the form of physical absorption. The reasonable process had been designed and analyzed by Aspen Plus v7.3 . Through the simulation method PSRK, effects of the number of theoretical stages and the optimal operating pressure, temperature, amount of fresh absorbent added were studied respectively. The optimal enrichment effect of CH4/N2 feed ratio was determined. Simulation results show that when the feed molar ratio of CH4/N2 is 3:7, it can improve methane concentration to 67.44% with a recovery ratio of 87.11%. When feeding methane concentration increased to more than 50%, it can be enriched to more than 80%, which is suitable for the CBM civil and industrial utilization value. The enrichment process designed can provide an idea for the enrichment of CBM. |
