不饱和聚酯树脂高浓度废水共沸精馏资源化与治理技术  

Recycling by azeotropic distillation and treatment technologies for high concentration wastewater from unsaturated polyester resin process

作　　者：赵贤广[1] 李武[1] 朱明新[1] 徐炎华[1] 许培圣 盛建凯 马越群 沈洪 朱锐 

机构地区：[1]南京工业大学环境学院江苏省工业节水减排重点实验室,南京210009 [2]江苏富菱化工有限公司,无锡214446

出　　处：《环境工程学报》2011年第12期2722-2726,共5页Chinese Journal of Environmental Engineering

基　　金：国家太湖水专项资助(2008ZX07101-003)

摘　　要：针对不饱和聚酯树脂生产高浓度废水的特点,采用新型共沸精馏技术进行资源化预处理。实验结果表明,共沸精馏几乎将废水中的原料、聚合中间体等有机物全部浓缩于釜液中,釜底浓缩液COD可高达120万mg/L左右,有机物回收率达93%～96%。将COD约120万mg/L的釜液以20%比例投入不饱和聚酯树脂合成反应中,制得了一种新型高性能树脂,且树脂的得率由常规生产的93.4%提高至99.77%。对与共沸剂分离后的COD约为1万mg/L的馏出液采用新型多技术协同催化氧化技术进行预处理,使废水B/C由0.021提高至0.3以上;再采用EGSB+MBBR生化处理和活性炭吸附深度处理,出水可稳定达标排放,并能满足循环冷却水要求。Aiming at the characteristics of high concentration wastewater from unsaturated polyester resin process, a novel azeotropic distillation was adopted as a recycling pretreatment. The experimental results showed that by the azeotropic distillation, the organic compounds in the wastewater, such as raw materials, polymeriza- tion intermediate etc, were almost condensed in the tower bottom liquid with COD up to 1 200 000 mg/L, and the total recovery rate of the organic compounds was about 93% -96%. Feeding the condensed liquid with COD 1 200 000 mg/L into the unsaturated polyester resin synthesis in 20% ratio to another raw materials, a new un- saturated polyester resin with better performances was attained, and the yielding rate increased from 93.4% in traditional process to 99.77%. For the distilled wastewater with COD about 10 000 mg/L separated from the en- trainer, a multi-technology enhanced catalytic oxidation technique was employed as pretreatment, resulting in the wastewater B/C increase from 0. 021 to above 0.3. The pretreated wastewater was treated again with biochemical treatment by EGSB ＋ MBBR technology and advanced treatment by activated carbon adsorption technology. E- ventually, the quality of effluent water could meet the state＇ s discharge standard and the cooling water standard.

关 键 词：不饱和聚酯树脂 废水 共沸精馏 资源化 催化氧化 

分 类 号：X703.1[环境科学与工程—环境工程]