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次氯酸钠消毒在大型水厂的优化与创新

2020-05-25 08:45来源:净水技术 

前言

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次氯酸钠消毒在大型水厂的优化与创新

wangqingsong , songshufen , kechengdong

(shaoxingshizhishuiyouxiangongsi , zhe jiangshao xing   3120000)

一、成品次氯酸钠系统的概况

songliulingshuichangshejirigongshui70want(an80wantxiaohe),qizhongyiqi40want/d,erqi30want/d(an40want/dxiaohe)。yuanshuiweishuikushui,caiyongchangguigongyi,yinyuanshuiphzhijiaoditoujiashihuijinxingsuanjiandudiaojie。yuanyelvtoujialiangwei2.0 mg/l。

岛国男女v片免费观迅雷看gaizaohoucaiyong10%shangpincilvsuannarongye,jingzaixianzilaishuixishizhi5%youxiaolvrongyebingchubeizaiyuanliaotongnei,tongguojingquejiliangjiangcilvsuannashusongdaoshuichanggegongyitoujiadian,fenbiezaichenqian、lvqian、lvhou、chuchangsidiantoujia,gongjiyoushuzibeng22tai,qizhong375 l/hliuliang12tai,60 l/hliuliang10tai。shuichangcilvsuannachubeixitongyou30 tchuguan10zhi,zuidachubeiliang300 t,kemanzugaofengshiqi10 ddeyongliang。

二、存在的问题

岛国男女v片免费观迅雷看chengpincilvsuannayongyushuichangxiaodu,zhuyaocunzaiyixiawenti:

(1)质量难控。岛国男女v片免费观迅雷看次氯酸钠的应用领域广泛,在各领域中的成品品质要求各不相同。虽然成品次氯酸钠生产工艺均采用烧碱和液氯反应制备,但由于一些生产厂家利用了化工废酸废碱作为生产原料,使市场中的成品质量参差不齐,产品价格也相差悬殊,对成品品质的有效保障带来风险。

(2)副产物氯酸盐偏高风险。目前国内没有针对次氯酸钠的氯酸盐指标限值,而根据欧盟标准,次氯酸钠氯酸盐含量要低于有效氯的5.4%。调研及实验证明,高浓度的次氯酸钠溶液非常容易分解,25℃时每天损失0.15 mg/L左右,温度越高、浓度越大则氯损失越多,主要是ClO—发生了歧化反应生成氯酸根。成品次氯酸钠含有效氯浓度一般在10%以上,若出厂前储备时间长则容易导致氯酸根含量超标,国内曾出现因投加高浓度成品次氯酸钠导致出厂水副产物超标(氯酸盐限值0.7 mg/L)的案例。为减少副产物产生,水厂目前采用成品到厂后进行对半稀释至5%。

(3)成品质量检测监控滞后。岛国男女v片免费观迅雷看为保证产品质量,水厂对每批产品进行进厂检测,但由于重金属、副产物等指标部分水厂不具备检测能力,均送外检测,检测报告的获取往往滞后于成品在水厂中的使用,导致产品质量事实上无法有效监控。

(4)货源难以有效保障。氯含量10%的次氯酸钠溶液属于危险品,运输需要具有相关资质的专门危险品车辆,如遇重大会议活动等特殊期间,危险品禁运或者生产厂家停产,货源难以有效保证。

(5)使用成本偏高。岛国男女v片免费观迅雷看虽然水厂在使用次氯酸钠后综合成本变化不大,但如果仅考虑氯消毒剂成本,其使用成本偏高。

三、宋六陵水厂现场制备改造

songliulingshuichangcilvsuannaxitongdeshengjigaizao,zaibaoliuyuanyoucilvsuannachubei、toujiaxitongdejichushang,xinzengcilvsuannaxianchangzhibeixitongbingpeitaotoujiabeng。xianchangzhibeixitongzhuyaoyouyanshuixitong、cinafashengzhuangzhi、tuoqingjizhongzhuanxitong、suanxixitong、kongzhixitongzucheng。

(1)盐水系统

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(2)次钠发生装置

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岛国男女v片免费观迅雷看caiyongshuilengfangshi,zhangqipaishui。dantaipaifangliang0.5m3/h。

(3)脱氢及中转系统

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(4)酸洗系统

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(5)配电及控制系统

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(6)系统布置

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四、结论与建议

(1)cilvsuannatidaiyelvdexiaodufangshi,jiejueleyelvdezhongdaanquanyinhuan,dadatigaoshengchanyunxingdeanquanxing。

岛国男女v片免费观迅雷看(2)xianchangzhibeicilvsuannajuyoujiaohaodetouzishouyi,yisongliulingshuichangweili,xiaoduchengbenmeiniankejieyue100wanyuanyishang,6.5nianjikeshouhuitouzichengben。qiesuizheweixianpinyunshufeiyuelaiyuegaodequshi,xianchangzhibeicilvsuannayuelaiyuejuyoujiaohaodetouzijiazhi。

(3)xiangbichengpincilvsuanna,xianchangzhibeicilvsuannayunxinganquanxinggenggao,yunxingguanligengjiaanquan。

岛国男女v片免费观迅雷看(4)xianchangzhibeicilvsuannajishuyichengshu,keyituiguangyingyong。weijiangditouzifengxian,jianyizaidaxingshuichangzhongkeyiwentuotuijin,caiyongfenjieduanshishidefangshi,diyijieduanxianzulinxianchangzhibeishebei,daigefangmiantiaojianchengshuhouzaigouhuishebeitouzi。

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来源:净水技术


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