燃煤电厂脱硫废水零排放预处理工艺选择与实践
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摘要
根据西宁火电厂末端脱硫废水水质特点以及后续浓缩减量工艺对进水水质的要求,提出三级软化加药及沉淀池+管式膜两级分离的预处理工艺路线。结果表明:相比较传统的两级软化一级分离工艺,所提方法将加药成本由41元/t降低至17元/t,实现了污泥的综合利用,提高了系统的抗冲击能力,为后续的浓缩减量和固化模块提供了优质的进水水质保证。
To satisfy the requirements on inlet water quality by subsequent concentration reduction module, a pretreatment process of three-stage softening and two-stage separation(sedimentation pool plus tubular membrane) was proposed for the desulfurization wastewater from Xining Thermal Power Plant according to properties of the wastewater. Results show that compared with the traditional two-stage softening and one-stage separation process, the method proposed helps to reduce the dosing cost from 41 RMB to 17 RMB for every ton of water, thus achieving comprehensive application of the sludge, improving the shock resistance of the system, and providing high quality of inlet water for the subsequent concentration reduction and solidification modules.
To satisfy the requirements on inlet water quality by subsequent concentration reduction module, a pretreatment process of three-stage softening and two-stage separation(sedimentation pool plus tubular membrane) was proposed for the desulfurization wastewater from Xining Thermal Power Plant according to properties of the wastewater. Results show that compared with the traditional two-stage softening and one-stage separation process, the method proposed helps to reduce the dosing cost from 41 RMB to 17 RMB for every ton of water, thus achieving comprehensive application of the sludge, improving the shock resistance of the system, and providing high quality of inlet water for the subsequent concentration reduction and solidification modules.
引文
[1] 中国电力企业联合会.中国电力行业年度发展报告2018[R].北京:中国电力企业联合会,2018.
[2] 李小琳.烟气脱硫废液的成分解析及其净化技术[D].大连:大连海事大学,2014.
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[4] 白炎武,刘平元,陆启亮,等.脱硫废水烟道蒸发技术蒸发特性实验研究[J].动力工程学报,2018,39(2):135-141.BAI Yanwu,LIU Pingyuan,LU Qiliang,et al.Experimental research on evaporation characteristics of desulfurization wastewater by flue evaporation treatment[J].Journal of Chinese Society of Power Engineering,2018,39(2):135-141.
[5] CARTWRIHT P S.管式微滤膜(TMF)技术应用于一个独特的零排放系统[C]//2012青岛国际脱盐大会论文集.青岛:中国科学技术协会,2012.
[6] 刘亚鹏,王金磊,陈景硕,等.火电厂脱硫废水预处理工艺优化及管式微滤膜实验研究[J].中国电力,2016,49(2):153-158.LIU Yapeng,WANG Jinlei,CHEN Jingshuo,et al.Optimization of FGD wastewater pretreatment technique for thermal power plant and test studies on tubular crossflow microfiltration process[J].Electric Power,2016,49(2):153-158.
[2] 李小琳.烟气脱硫废液的成分解析及其净化技术[D].大连:大连海事大学,2014.
[3] 马双忱,于伟静,贾绍广,等.燃煤电厂脱硫废水处理技术研究与应用进展[J].化工进展,2016,35(1):255-262.MA Shuangchen,YU Weijing,JIA Shaoguang,et al.Research and application progresses of flue gas desulfurization (FGD) wastewater treatment technologies in coal-fired plants[J].Chemical Industry and Engineering Progress,2016,35(1):255-262.
[4] 白炎武,刘平元,陆启亮,等.脱硫废水烟道蒸发技术蒸发特性实验研究[J].动力工程学报,2018,39(2):135-141.BAI Yanwu,LIU Pingyuan,LU Qiliang,et al.Experimental research on evaporation characteristics of desulfurization wastewater by flue evaporation treatment[J].Journal of Chinese Society of Power Engineering,2018,39(2):135-141.
[5] CARTWRIHT P S.管式微滤膜(TMF)技术应用于一个独特的零排放系统[C]//2012青岛国际脱盐大会论文集.青岛:中国科学技术协会,2012.
[6] 刘亚鹏,王金磊,陈景硕,等.火电厂脱硫废水预处理工艺优化及管式微滤膜实验研究[J].中国电力,2016,49(2):153-158.LIU Yapeng,WANG Jinlei,CHEN Jingshuo,et al.Optimization of FGD wastewater pretreatment technique for thermal power plant and test studies on tubular crossflow microfiltration process[J].Electric Power,2016,49(2):153-158.