Abstract:

Based on the demand of water saving and emission reduction，a refinery adopted the addition of electrochemical device as a transformation plan to upgrade the circulating water system. In order to control the sum of the calcium hardness and total alkalinity of circulating water below 1 000 mg/L，considering the treatment capacity of the electrochemical device，the water quality of the water and the owner，the concentration rate of the upgraded system is increased to 7 times. The water-saving system of electrochemical and pharmaceutical joint treatment of circulating water control upgraded by the electrochemical water-saving technology were analyzed. After half a year of continuous operation，the concentration rate of the circulating water system was increased from 4 times to more than 7 times，the circulating water supplement was reduced by 19.7%，and the sewage discharge amount was reduced by 64.5%. The economy of the electrochemical water-saving technology was also analyzed. After the upgrade，the amount of corrosion inhibitor and fungicide of the system was reduced by 50% and 98%，respectively，saving 1.55 million yuan every year.

Key words: circulating water, electrochemistry, water saving and emission reduction, sterilization

摘要：

某炼厂基于节水减排的需求，采用增设电化学装置作为改造方案，对循环水系统进行升级改造。为将循环水钙硬度+总碱度控制在1 000 mg/L以下，综合考虑电化学装置的处理能力、补水水质情况和业主要求的2 a收回改造成本的目标，确定将升级改造后系统的浓缩倍率提高至7倍。以该电化学节水技术升级改造的电化学与药剂联合处理循环水控制的节水系统为案例进行分析，连续运行0.5 a后，升级改造后使该循环水系统的浓缩倍率由4倍提高到7倍以上，循环补水量降低了19.7%，排污量降低了64.5%。并分析了电化学节水技术的经济性。升级改造后，系统的缓蚀阻垢剂和杀菌剂投加量分别降低了50%和98%，每年可节省约155万元。

关键词: 循环水, 电化学, 节水减排, 杀菌

CLC Number: 

• TQ085