北方某水厂超滤膜化学清洗方式优化研究
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摘要
以北方某水厂现有超滤膜车间化学清洗工艺为基础,通过改变清洗温度、药剂浓度以及清洗时长等技术参数对受污染膜丝进行模拟清洗,并结合实际生产中的经济指标,找出更合理、更经济的化学清洗方式。研究发现,膜丝上附着的有机污染物与无机污染物处于交错纠缠的板结状态,没有必要对其进行分别处理。通过改变清洗温度、药剂浓度以及清洗时长等技术参数,能够有效改善现有化学清洗模式,可节约大量的劳动力成本及时间成本,更可大幅降低化学清洗工作对超滤膜工艺产水能力的影响。
Based on the existing chemical cleaning technology of the ultrafiltration membrane workshop in a waterworks in north China,the contaminated membrane fiber was cleaned by changing the cleaning temperature,reagent concentration and cleaning time. Combined with the economic indicators in production,a more reasonable and economical chemical cleaning method was proposed. It was found that membrane fibers with organic pollutants and inorganic pollutants remained in a crisscross and harden condition and were unnecessary to be separately treated. Changing the cleaning technology parameters such as temperature,reagent concentration and cleaning time,could effectively improve the existing chemical cleaning mode,which could substantially save labor cost and time cost,as well as significantly reduce the impact of chemical cleaning on the water production capacity.
Based on the existing chemical cleaning technology of the ultrafiltration membrane workshop in a waterworks in north China,the contaminated membrane fiber was cleaned by changing the cleaning temperature,reagent concentration and cleaning time. Combined with the economic indicators in production,a more reasonable and economical chemical cleaning method was proposed. It was found that membrane fibers with organic pollutants and inorganic pollutants remained in a crisscross and harden condition and were unnecessary to be separately treated. Changing the cleaning technology parameters such as temperature,reagent concentration and cleaning time,could effectively improve the existing chemical cleaning mode,which could substantially save labor cost and time cost,as well as significantly reduce the impact of chemical cleaning on the water production capacity.
引文
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[2]丁昀,岳鹏,杨庆,等.黄河刘家峡库水直接/混凝超滤给水处理效果研究[J].膜科学与技术,2016,36(4):119-125.Ding Yun,Yue Peng,Yang Qing,et al.Treatment effect studies on Yellow River Liujiaxia Reservoir water by UFand coagulation-UF for drinking water[J].Membrane Science and Technology,2016,36(4):119-125(in Chinese).
[3]陈治安,刘通,尹华升,等.超滤在饮用水处理中的应用和研究进展[J].工业用水与废水,2006,37(3):7-10.Chen Zhian,Liu Tong,Yin Huasheng,et al.Application and study progress of UF in drinking water treatment[J].Industrial Water&Wastewater,2006,37(3):7-10(in Chinese).
[4]张阳.饮用水处理中化学清洗对超滤膜性能影响及性能调控研究[D].天津:天津大学,2017.Zhang Yang.The Effects of Chemical Cleaning on the Performance of Ultrafiltration Membranes in Drinking Water Treatment and the Control Methods[D].Tianjin:Tianjin University,2017(in Chinese).
[5]张磊,顾军农,游晓旭,等.超滤处理丹江口水库源水的“零污染”技术研究[J].中国给水排水,2016,32(23):5-9.Zhang Lei,Gu Junnong,You Xiaoxu,et al.Non-fouling ultrafiltration technology for treatment of source water from Danjiangkou Reservoir[J].China Water&Wastewater,2016,32(23):5-9(in Chinese).
[6]张晓岚,王敏,柴文,等.混凝-超滤组合工艺中受污染超滤膜的化学清洗及其对水质的影响[J].给水排水,2016,42(1):17-22.Zhang Xiaolan,Wang Min,Chai Wen,et al.Chemical cleaning of membrane fouled in coagulationultrafiltration combined process and its effect on the effluent quality[J].Water&Wastewater Engineering,2016,42(1):17-22(in Chinese).