双碱法用于烧结烟气脱硫中再生实验的研究  

RESEARCH ON DUAL-ALKALI PROCESS' REGENERATION PHASE FOR SINTERING FLUE GAS DESULFURIZATION

作　　者：Mbango Mbida K.G. 宋存义[1] 周向[1] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083

出　　处：《环境工程》2012年第3期127-130,共4页Environmental Engineering

摘　　要：实验考察了影响双碱法再生过程的主要操作参数,包括搅拌速率、再生时间和pH值变化、反应温度、n(Ca(OH)2)/n(Na2SO3)等。使用XRD验证产物成分,用扫描电镜分析了再生CaSO3的形态。实验结果表明:Na2SO3浓度0.3和0.4 mol/L时,保持搅拌速率500 r/min、再生反应时间1 min、温度50℃能够取得最好的再生效果,一次再生后未反应的Ca(OH)2含量大约是34%;降低n(Ca(OH)2)/n(Na2SO3)能提高Ca(OH)2利用率。实验结果能够给再生系统的工程设计提供一定的指导。The main effects of operating parameters on dual-alkali flue gas desulfurization process （the stirrer speed, regeneration time, temperature, ratio of Ca （OH）2/Na2SO3 ） in regeneration tank were investigated. The X-ray diffraction analyses were used to identify the compound, and scanning electron microscope （ SEM ） to observe the morphology of the mixture material sample of CaSO3. The test results showed that the optimum effects were obtained on conditions of stirrer speed 500 r/min, reaction time 1 min, reacting temperature 50℃ with sodium sulfite＇s concentration being 0.3 and 0. 4 mol/L; the amount of unreacted calcium hydroxide was around 34% without recycle and higher utilization ratio of Ca（OH） 2 was achieved when the Ca（OH） 2/Na2S03 was decreased. These results provide useful guide for engineering design.

关 键 词：双碱法烟气脱硫 再生过程 未反应的氢氧化钙 PH值 

分 类 号：X757[环境科学与工程—环境工程]