• 关键词：有机废液  脱盐  萃取  焚烧

• 基金项目：

• 马静颖
• 1. 浙江大学热能工程研究所, 浙江大学能源清洁利用国家重点实验室, 杭州 310027; 2. 浙江建设职业技术学院城市建设工程系, 杭州 311231

• 马增益
• 浙江大学热能工程研究所, 浙江大学能源清洁利用国家重点实验室, 杭州 310027

• 严建华
• 浙江大学热能工程研究所, 浙江大学能源清洁利用国家重点实验室, 杭州 310027

• 倪明江
• 浙江大学热能工程研究所, 浙江大学能源清洁利用国家重点实验室, 杭州 310027

• 岑可法
• 浙江大学热能工程研究所, 浙江大学能源清洁利用国家重点实验室, 杭州 310027

• 摘要：提出并研究了萃取-焚烧工艺在蒸发残液焚烧处理中的应用.以乙酸乙酯为萃取剂,水油体积比为5时,将含30g·L^-1氯化钠、1g·L^-1对硝基苯酚的模拟废水剧烈振荡1min,静置10min后进行萃取,一级萃取效率和二级萃取效率分别为97.12%和99.89%.随着水油比的升高,一级萃取效率和二级萃取效率都有所下降,但是经过二级萃取之后,有机物的萃取率均在99.00%以上.废水中的氯化钠对萃取效率有提高作用,当氯化钠浓度从60g·L^-1升高到200g·L^-1时,一级萃取效率和二级萃取效率分别从94.76%和99.82%上升到97.53%和99·92%.正辛醇的萃取效率较乙酸乙酯低.经过萃取脱盐的有机相,蒸发回收有机溶剂后得到有机物残渣,有机物残渣与有机废水蒸汽一起进入流化床焚烧炉进行焚烧处理;当焚烧炉的温度从700℃提高到850℃时,有机废水蒸汽单独焚烧的焚烧效率从86.34%上升到99.96%,而有机废水蒸汽和有机残渣混合焚烧时的焚烧效率则从90.16%上升到99.99%.

• Abstract：Evaporation residues contain high concentration inorganic salts and non-volatile organic compounds. An extraction-desalination method for para-nitrophenol (PNP) wastewater was presented. Effect of different volume ratio of solvent and wastewater and different concentration of NaCl was discussed. Incineration of the desalinated residue was incinerated in a FBCincinerator. The experiment results show that one-stage and two-stage PNPextraction rate is decreased when the volume ratio of wastewater and solvent is increased. When the initial concentration of NaCl is increased from 60 g·L^-1 to 200 g·L^-1, one-stage and two-stage extraction efficiency is increased from 94.76% and 99.82% to 97.53%and 99.92%, respectively. Extraction efficiency of n-octanol is less than ethyl acetate. The used extraction solvent can be recycled. When temperature of the incinerator is increased from 700 ℃ to 850 ℃,combustion efficiency of the steam is increased from 86.34% to 99.96%,while combustion efficiency of the steam and the residue is increased from 90.16% to 99.99%.

• Key words：organic wastewater  desalination  extraction  incineration

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