The Process Of Super Claus Sulfur Recovery And The SSR Tail Gas Treatment Simulate Based On Aspen Plus

In the conversion gas Composition of raw coal, oil and natural gas, H2 S will not only affect the quality of downstream products, but also can poison the catalysts to loose their activity. More serious, it can enhance the corrosion degree of devices or pipes, make the system out of control. Therefore, the sulfur recovery process has become an essential part in C1 chemical processing industry, following with the acid gas treatment unit. In recent years, more and more focus are attracted on the environmental protection, the index of SO2 exhaust emission become even rigoro us. Adding exhaust gas treatment unit after sulfur recovery process can reduce the SO2 relax into atmosphere and prompt the sulfur recovery.This paper uses the chemical process simulation software Aspen Plus simulated the whole process of the super C laus sulfur recovery and SSR tail gas treatment process. By adjusting the process parameters, improving the sulfur recovery rate as much as possible, reducing the SO2 content in the exhaust gas, and according to the simulation results, designing preliminary the reactor of the super Claus sulfur recovery section.During the super Claus sulfur recovery section, using the POLYSL property method to simulate, modeling the combustion furnace, catalytic converter and condenser unit module respectively, in order to increase the sulfur recovery rate to 99.94%. In SSR tail gas treatment section, using the ELECNRTL property method to simulate, modeling the absorption tower unit module, so as to make the discharge volume of SO2 in the tail gas less than 960 mg/m3.By utilizing the sensitivity analysis function of the software, we studied the effect of the hot temperature in the combustion furnace, the volume of air inlet, the outlet temperature of the catalytic converter, the volume of H2 inlet and the amount of MDEA solution inlet respectively on the reaction process. The results show that, when the hot temperature of the combustion furnace was controlled at 980℃, the quantity of air inlet was 8000 kg/h, the outlet temperature of first catalytic converter was 305℃, the outlet temperature of second catalytic converter was 220℃, the volume of H2 inlet was above 1 kg/h, the amount of MDEA solution inlet was above 50280 kg/h, the whole reaction reached optimal state.According to the capacity of acidic gas of the sulfur recovery section handling the catalytic converter design, the total filling volume of reactor catalyst is 16.41 m3, the diameter of the shell is 2 m, and the length is 8 m. The filling volume of the catalyst of the first level reactor is 8.21 m3, the bottom area is 6.00 m2, and the height is 1.37 m; the filling volume of the catalyst of the second level reactor is 8.21 m3, the bottom area is 5.80 m2, and the height is 1.42 m. The shell thickness of the reactor is 0.10 m, the total height is 9.10 m, the head height is 0.50 m, the thickness is 0.10 m. The design of the reactor satisfies the requirement of hydrostatic test, which is qualified...