1. School of Energy and Environment, Ahhui University of Technology, Maanshan 243032, China;
2. School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
In order to solve the disadvantage of the design and operation of total sulfite oxidation system of ammonia-based desulphurization process relied on experience, resulting in fluctuation of service, high cost of investment and high operation cost, a mathematical model of total sulfite oxidation system was developed based on investigation of kinetics of oxidation of total sulfite. The model can predict the oxidation ratio of total sulfite at different parameters such as pH of solution, total sulfur concentration, air flow and residence time. The model was used to simulate the oxidation of total sulfite of a lab-scale ammonia-based desulphurization system and the predicted oxidation ratio of total sulfite was compared with the measured values. The results showed that the predicted oxidation ratio of total sulfite agreed well with the experimental values and the difference between the two was below ±20%. The mathematical model would assist us in the design and operation of the total sulfite oxidation system of ammonia-based desulphurization process.
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