Abstract：SO2 emitted by coal-fired power plants is the main source of air pollutants in China. With the increasingly strict emission regulations, the advanced flue gas desulfurization technology is urgently needed to achieve ultra-low emissions. For the sulfur-containing flue gas of a plant of 2.16×109 Nm3/a, the improved Elsorb deep desulfurization technology was adopted to establish an deep desulfurization process for industrial flue gas. The whole process was simulated and optimized by Aspen Plus software. The absorption mechanism was theoretically analyzed and the appropriate physical properties and modelling blocks were selected during modeling. The absorption liquid composition and process operating parameters were analyzed and optimized. Further, energy-saving technologies such as heat exchange networks and heat pump evaporation were introduced to achieve energy saving and emission reduction. The simulation results showed that the SO2 content in the exhaust gas was reduced to 2.47 mg/Nm3, the desulfurization ratio reached 99.92%, and the energy consumption (standard coal) per unit standard volume of exhaust gas treatment was as low as 6.46?10-4 kgce/Nm3 with this technology and energy-saving scheme. And 3 900 t/a SO2 gas (98.6 mol %) and 4 280 t/a SO2 aqueous solution (10 mol%) can be obtained for subsequent resource utilization.
Ma Yulong,Wu Yikun,Gao Yang et al. imulation and Optimization on the Improved Elsorb Deep Desulfurization Technology of Flue-Gas[J]. 化学反应工程与工艺, 2018, 34(6): 481-488.
