(540f) The Simulation of an Industrial Wet Flue Gas Desulfurization Absorber
AIChE Annual Meeting
Wednesday, November 16, 2016 - 2:00pm to 2:18pm
The modelling of the injectors was successfully achieved with a statistical model based on an optimized number of parcel streams to ensure converged results. The detailed modelling of the injector assembly enabled accurate description of the gas and droplet behaviour with particular reference to the velocity fields, the L/G ratio, and the droplet size distribution. The gas and droplet velocities were found to be within the ranges suitable for controlling conditions to avoid carry-over of the smaller droplets in the outlet gas stream, and thus to ensure effective operation of the mist eliminator. The distortion of droplets was found to be very small with the largest effect occurring at the gas inlet to the tower. The inclusion of evaporation in the model proved to be important to accurately describe the temperature and moisture concentration profiles within the column. Consequently, the model predicted that saturation is achieved relatively close to the flue gas inlet, and that saturated conditions are prevalent over most of the column. The dependence of the desulfurization efficiency on the slurry pH as predicted by the model were found to correlate well with the plant test results.