摘要：In metal productions from sulphide ores, sulphur dioxide (SO2) is generated when the ore concentrate is smelted. To minimize emission of SO2 to the atmosphere, sulphuric acid plants are used to convert SO2 gas into sulphuric acid product in smelters. A SO2 to sulphur dioxide (SO3) converter, where SO2 is oxidized to SO3 with the help of catalyst, is the key unit in a sulphuric acid plant. For monitoring the converter, temperature of the reactor is extensively measured at various locations, but the concentration of SO2 is barely measured or only measured at very limited points due to the difficulty and costs involved. In this paper, a soft sensor is developed to estimate the conversion ratio and concentration of SO2. The soft sensor is derived based on the steady state mass balance model of the converter and dynamic data analysis. From the proposed soft sensor, conversion ratio and concentration of SO2 can be estimated from available industrial real‐time measurement.
