摘要
针对光伏产业产生的高浓度含氟废水处理难题,本研究采用流化床诱导结晶技术实现氟离子的高效去除与资源化回收。通过系统优化工艺参数,确定了最佳运行条件:以氯化钙为沉淀剂,Ca/F摩尔比为1∶1,回流流量为720 L/h,并投加1 g预制氟化钙晶种。在此条件下,氟离子去除率高达99.74%,出水氟离子浓度稳定低于10 mg/L,满足国家工业废水排放标准。该工艺对广谱浓度范围内的含氟废水均具有优异的适应性和稳定性。对沉淀产物的物相表征表明,所得产品为高纯度、粒径均匀的球状氟化钙,具备资源化利用潜力。本工艺验证了流化床诱导结晶技术在深度除氟方面的高效性与可靠性,为含氟废水的处理提供了一种经济环境可行的技术路径。
To tackle the challenge of treating high-concentration fluoride-laden wastewater from the photovoltaic industry,this study employs fluidized bed induced crystallization technology to achieve highly efficient fluoride removal and simultaneous resource recovery.After systematically optimizing operational parameters,the optimal conditions were identified as follows:calcium chloride as the precipitant,a Ca/F molar ratio of 1:1,a reflux flow rate of 720 L/h,and the addition of 1 g of pre-formed calcium fluoride seed crystals.Under these conditions,a fluoride removal efficiency of up to 99.74%was achieved,with the effluent fluoride concentration consistently maintained below 10 mg/L,complying with national industrial wastewater discharge standards.The process demonstrates excellent adaptability and stability across a broad range of influent fluoride concentrations.Phase characterization of the precipitated product confirms that it consists of high-purity,spherical calcium fluoride particles with uniform particle size,indicating strong potential for resource utilization.This work validates the high efficiency and reliability of fluidized bed induced crystallization technology for deep defluoridation and presents an economically and environmentally viable technical pathway for the treatment of fluoride-laden wastewater.
作者
徐津
罗炜萍
关乾
李英朋
XU Jin;LUO Weiping;GUAN Qian;LI Yingpeng(School of Environmental and Chemical Engineering,Nanchang Hangkong University,Nanchang 330063,China;Haixi(Fujian)Institute,China Academy of Machinery Science and Technology Group Co.,Ltd.,Sanming 365500,China;College of Environment and Ecology,Xiamen University,Xiamen 361102,China)
出处
《水处理技术》
北大核心
2026年第2期129-133,共5页
Technology of Water Treatment
基金
国家自然科学基金(51568050)。
关键词
光伏废水
氟化钙
流化床诱导结晶
晶种
photovoltaic wastewater
CaF_(2)
fluidized bed induced crystallization
seed crystals
