北方某水厂超滤膜化学清洗方式优化研究

Optimization of Chemical Cleaning Method for Ultrafiltration Membrane in a Waterworks in North China

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.