Assuming that only CaSO3 is produced, calculate the daily production rate (in tons/day) of a 55%-solids sludge from a 90%-efficient limestone FGD system on a 600-MW power plant burning 3.5%-sulfur coal. The plant has a thermal efficiency of 35%, and the coal has a heating value of 12,000 Btu/lbm. Assume that the limestone is 95% CaCO3 and 5% inert substances, and the ratio of the actual amount of limestone fed to the theoretical amount required is 1.15. Estimate a typical make-up rate (in lbm/hr) of sodium carbonate to a Wellman-Lord FGD system
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