Research Of The Limestone-gypsum Flue Gas Desulfurization Technology In Luan He Power Plant

With the development of China economy, peolple emphase on the environmentalquality, moreover controling the sulfur dioxide pollution has become a top priority ofair pollution control.Among them, the flue gas desulfurization is more effective, theactual operable one of the measures. Luan River Power Plant6#7#unit coal-firedboiler with electrostatic precipitator to clean the boiler flue gas SO₂failed to meet therequirements of the national energy saving and emission standards, to meet energysaving requirements, and proposed to take limestone-gypsum wet FGD systempurification of its flue gas.In this study, the paper research6#、7#unit coal-fired boiler present situation,investigate the desulfurization process at home and abroad, apply to6#、7#unitcoal-fired limestone-gypsum wet FGD technology principles, characteristics, systemcomponents on the basis of boiler flue gas limestone-gypsum wet desulphurizationprocesses, running programs, and investigated the effect of consecutive22-day trialrun, analyze the main problems in the process operation to optimize the running ofprocess parameters, to further examine the optimization of processparametersoperating results.The results showed that: During the trial operation ofdesulfurization efficiency is low, the flue gas temperature and pH value of slurry ofFGD system was not stable standard main factor; experimental optimization ofdetermining the optimum inlet gas temperature was80-85℃, pH value ofserum5.5-6in between. After parameter optimization, through22days of continuousoperation, stable SO₂emission can be controlled below200mg/m3, efflux flue gas tomeet the GB13223-2003《Emission standard of air pollutants for thermal powerplants》, the removal rate of SO₂between91.3-92.7%, SO₂removal efficiency stability.Environmental benefits are significant.