两种大型饮用水厂次氯酸钠发生器运行评价分析  

Comparative Analysis of Two Kinds of Sodium Hypochlorite Generators in Large Drinking Water Treatment Plants

作　　者：颉亚玮 樊丞越 张奔 刘宏远[1] 张刚 朱海涛 XIE Ya-wei;FAN Cheng-yue;ZHANG Ben;LIU Hong-yuan;ZHANG Gang;ZHU Hai-tao(College of Civil Engineering,Zhejiang University of Technology,Hangzhou 310023,China;Jiaxing Water Investment Group Co.Ltd.,Jiaxing 314000,China)

机构地区：[1]浙江工业大学土木工程学院,浙江杭州310023 [2]嘉兴市水务集团有限公司,浙江嘉兴314000

出　　处：《中国给水排水》2022年第15期1-6,共6页China Water & Wastewater

基　　金：国家自然科学基金资助项目(52070111、52170093);浙江省自然科学基金资助项目(LY22E080010)。

摘　　要：次氯酸钠消毒工艺在饮用水厂已经得到了广泛应用,对某水厂3台有效氯产量为20kg/h的次氯酸钠发生器在有效氯浓度、氯酸盐浓度、盐耗、电耗等方面进行了对比研究。结果表明,3台发生器(进口F1^(#)和F2^(#),国产C1^(#))产出有效氯的平均浓度分别为0.81%、0.79%和0.85%,基本达到0.8%的设计有效氯浓度要求;产液中氯酸盐与有效氯的比值分别为4.8%、4.9%、1.2%,也均低于《人类消耗水处理用化学品——次氯酸钠》(BS EN 901—2013)中5.4%的要求,C1^(#)副产物氯酸盐的含量仅为F1^(#)和F2^(#)的24%左右。C1^(#)发生器在夏季、正常、冬季3种模式下的电耗均低于F1^(#)和F2^(#),其中,在冬季模式下C1^(#)采用电解槽换热方式代替压缩机加热,进一步降低了发生器的电耗。F1^(#)、F2^(#)、C1^(#)的平均运行成本分别为6.8、6.7、5.6元/kg,C1^(#)由于低电耗的优势,运行成本低于F1^(#)和F2^(#)。同时,相比进口次氯酸钠发生器1年的保修年限,国产发生器的保修年限为5年,具有较强的竞争力。The sodium hypochlorite disinfection process has been extensively applied in drinking water treatment plants.Three large-scale sodium hypochlorite generators with active chlorine production of 20 kg/h were compared in terms of active chlorine concentration,chlorate,salt consumption,and power consumption.The results showed that the average concentrations of active chlorine produced by three generators(F1^(#),F2^(#)and C1^(#))were 0.81%,0.79%,and 0.85%,respectively,which met the design concentration of about 0.8%.The ratios of chlorate to active chlorine in the effluent of the three generators(F1^(#),F2^(#)and C1^(#))were 4.8%,4.9%and 1.2%,respectively,meeting the requirements of less than 5.4%specified in Chemicals Used for Treatment of Water Intended for Human Consumption—Sodium Hypochlorite(BS EN 901-2013).The chlorate by-product concentration of C1^(#)was only around 24%of that of F1^(#)and F2^(#).The power consumption of C1^(#)generator was lower than that of F1^(#)and F2^(#)under summer mode,normal mode,and winter mode.Among them,in winter mode,C1^(#)adopted electrolytic cell heat transfer instead of compressor heating,further reducing the power consumption of the generator.The average operating cost of three generators(F1^(#),F2^(#)and C1^(#))were 6.8 yuan/kg,6.7 yuan/kg and 5.6 yuan kg,and C1^(#)was lower than F1^(#)and F2^(#)resulted from its lowest power consumption.In addition,compared to the 1-year warranty period of the imported sodium hypochlorite generators,the warranty period provided by the domestic generator was 5 years,which was highly competitive.

关 键 词：次氯酸钠发生器 有效氯 氯酸盐 盐耗 电耗 运行成本 

分 类 号：TU991[建筑科学—市政工程]