摘要
再生水作为火电厂生产用水,增加了反渗透膜结垢或被污染的风险,异常情况主要表现在给水压力、压差、产水流量和脱盐率的变化,应结合预处理方式和原水水质进行判断,确定结垢或污染物类型。碳酸钙垢和硫酸钙垢的清洗主要采用酸和EDTA盐,微生物和细菌污染采用非氧化性的杀菌剂,铁污染的清洗剂主要是NaHSO3溶液,无机胶体污染采用低浓度的NaOH溶液,在清洗过程中应严格控制清洗剂的温度和pH值。
As the production water of thermal power plant, reclaimed water increases the risk of fouling or contamination of the reverse osmosis membrane. The abnormal situations are manifested in the feed water pressure, pressure difference, water flow rate and desalination rate. It is necessary to determine the type of fouling or contamination by combining the pre-treatment method and raw water quality. Acid and EDTA salt are mainly used for cleaning calcium carbonate scale and calcium sulfate scale, non oxidizing bactericide is used for cleaning microbial and bacterial pollution, NaHSO3 solution is used for treating iron pollution, low-concentration NaOH solution is used to treat inorganic colloid pollution. The temperature and pH of the cleaning agent should be strictly controlled during the process.
作者
张伟伟
田明
ZHANG Wei-wei;TIAN Ming(Shijiazhuang Environmental Monitoring Center,Shijiazhuang Hebei 050000,China;Xingtai Polytechnic College,Xingtai Hebei 054000,China)
出处
《辽宁化工》
CAS
2021年第4期533-535,共3页
Liaoning Chemical Industry
关键词
反渗透
化学清洗
结垢
Reverse osmosis
Chemical cleaning
Fouling
