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SEED CRYSTAL SLURRY SUPPLY METHOD IN WASTE GAS DESULFURIZATION APPARATUS ACCORDING TO WET LIME GYPSUM PROCESS
SEED CRYSTAL SLURRY SUPPLY METHOD IN WASTE GAS DESULFURIZATION APPARATUS ACCORDING TO WET LIME GYPSUM PROCESS
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机译:湿法石灰石膏制浆烟气脱硫装置中的种子结晶浆供应方法
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摘要
PURPOSE:To prevent scale adhesion in a washing apparatus, by measuring boiler load or a fuel flow amount, the O2-concn. in effluent gas from an oxidation apparatus, the flow amount of a washing liquid to the oxidation apparatus and the flow amount of a seed crystal slurry while manipulating the flow amount of the seed crystal slurry so as to make the operation result of the measured values constant. CONSTITUTION:A boiler load signal measured by a detector 24 is inputted to a function generator A23 while the O2-concn. signal in effluent gas from an oxidation apparatus 5 measured by an O2-densitometer 21 is inputted to a function generator B. The flow amount F of a washing liquid withdrawn to the oxidation apparatus 5 from a washing apparatus 3 and the flow amount F' of a seed crystal slurry supplied to the washing apparatus 3 from the oxidation apparatus 5 are measured by flow meters 27, 32 and the measured values are inputted to a subtractor A33. Operation shown by formula is performed and the flow amount of the seed crystal slurry in an arranged pipe 6 is manipulated so as to make a CaSO4-concn. constant by a regulator 29. The set value of the regulator 29 is set to a predetermined amount or more of the CaSO4-concn. generating no scale.
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