摘要
根据新疆某大型火电厂化学沉淀法脱硫废水处理系统进、出口水质监测结果,分析其出水水质超标原因及工艺设计缺陷,以使该火电厂脱硫废水处理系统出水水质达到DL/T 997-2006要求,并满足后续处理工艺的进水要求。提出脱硫废水处理系统工艺优化对策:在原三联箱处理单元前设置沉降池并更换曝气设备,能够有效降低进水的悬浮物含量和COD;增加二级软化+微滤预处理工艺;增加深度处理工艺,即高压纳滤+冷冻结晶+高压反渗透(RO)+蒸发结晶工艺。可使脱硫废水能够最大限度的进行回用,溶解盐被分质结晶,实现真正意义上的"零排放"。
According to the monitoring results of the influent and effluent quality of the desulphurization wastewater treatment system by chemical precipitation method in a large-scale thermal power plant in Xinjiang. The cause of exceeded standard of the effluent quality and the defect of the process design were analyzed, so that the effluent quality of the desulfurization wastewater treatment system of the thermal power plant reached DL/T 997-2006 requirements, and met the follow-up process of influent water requirements. The optimization measures of desulfurization wastewater treatment system were proposed. The sedimentation tank was installed in front of the original triple-tank treatment unit and the aeration equipment was replaced to effectively reduce the suspended solids content and COD in influent; to add two-stage softening and microfiltration pretreatment process; to increase advanced treatment process, that was high-pressure nanofiltration ＋frozen crystallization ＋high pressure reverse osmosis（RO） ＋evaporation crystallization process.The desulfurization wastewater could be reuse maximum, and dissolved salt was qualitative and quantitative crystallization, to achieve a real sense of zero emission.
作者
庞冬
贾尔恒·阿哈提
何秉宇
王晓愚
PANG Dong;JIAERHENG Ahati;HE Bingyu;WANG Xiaoyu(Institute of Resources and Environmental Science,Xinjiang University,830046;Xinjiang Academy of Environmental Protection Science,Xinjiang Key Labortory for Environmental Pollution Monitoring and Risk Warning,83001;Laboratory of Wisdom City and Environmental Modeling,830046： Urumqi,China)
出处
《水处理技术》
CAS
CSCD
北大核心
2018年第8期89-93,共5页
Technology of Water Treatment
基金
国家重点研发计划项目(2016YFC0400505)
关键词
湿法脱硫废水
水质超标
工艺优化
wet desulfurization wastewater
water quality exceed standard
process optimization
作者简介
庞冬（1990-），女，硕士研究生，研究方向为环境科学；联系电话：15899208957；电子邮件：pangdong1228@163．com;联系作者：贾尔恒·阿哈提，高级工程师；电子邮件：jiaeh@sina．com
