晶硅生产废水处理工艺

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多晶硅生产废水处理简介

1、药剂配制

(1)SHIHUIRUDEPEIZHI。SHIHUIRUJIAOBANCAOZHURUYIDINGRONGJIDEHUIYONGSHUI,HUANMANJIARUCa(OH)2HANLIANGDAYU70%DE200MUSHIHUIFENBINGBUDUANJIAOBAN,PEIZHICHENG20%DESHIHUIRURONGYE。LIANGZUSHIHUIRUJIAOBANCAO,YITAOPEIZHIYITAOSHIYONG,XIANGHUJIAOTIYUNXING。

(2)PACRONGYEDEPEIZHI。A120,HANLIANG>30%、YANJIDU>80%DEPACANBILIHUANMANTOUJIADAOYONGHUIYONGSHUIDINGRONGDEPACRONGJIEPEIZHIJIAOBANCAOZHONG,BUDUANJIAOBANPEIZHICHENG5%DEPAcRONGYE,DAKAIFANGYEFA,SHIPEIZHIHAODEPAcRONGYEJINRURONGYECAOZHONGGONGCHULIXITONGSHIYONG,LIANGZURONGYECAOYIZUPEIZHIYIZUSHIYONG。

(3)PAMRONGYEDEPEIZHI。XIANGPAMPEIZHIJIAOBANCAOZHURUYIDINGLIANGHUIYONGSHUI,QIDONGJIAOBANJI,RENGONGHUANHUANXIANGCAONEITOUJIAFENZILIANG>l 200WANDEYANGLIZIGAOXIAOXUNINGJIPAM,CHONGFENJIAOBANSHIQIRONGJIEPEIZHICHENGDE5‰PAMRONGYE,DAKAIFANGYEFA,FENBIEXIANGLIANGGERONGYECAOZHURUYIDINGLIANGDE5‰PAMRONGYE,QIDONGRONGYECAOJIAOBANJI,XIANGRONGYECAONEIJIAHUIYONGSHUIBINGCHONGFENJIAOBANWANQUANRONGJIEPEIZHICHENG0.5‰DEYAOYE,LIANGZUPAMRONGYECAO,YIZUSHIYONGYIZUPEIZHI,JIAOTIYUNXING。ZAIYAOJIDEPEIZHIHESHIYONGGUOCHENGZHONG,WEIBIMIANYAOYECHENDIANHUOJIEJIAO,YAOBAOCHIJIAOBANJILIANXUYUNXING。

2、中和

SUANXINGFEISHUIYOUTISHENGBENGSHUSONGZHIZHONGHECAOYUSHIHUIRUFASHENGZHONGHEFANYING,YOUYUFANYINGXUYAOYIDINGDESHIJIAN,KONGZHIBUHAOYIZAOCHENGCHUSHUIpHBUNENGMANZUGONGYIYAOQIU。WEIBAOZHENGCHULIXITONGLIANXUWENDINGYUNXING,BENGONGYICAIYONGLIANGJIZHONGHECAOCHUANLIANJINXINGZHONGHEFANYING,JISUANXINGFEISHUIZIYIJIZHONGHECAOXIABUJINRU,TONGGUOSHANGBUYILIUYANGUANDAOZIERJIZHONGHECAOXIABUJINRU,FEISHUIZAIZHONGHECAOSHENGLIUGUOCHENGZHONGYUTONGRENZHONGHECAOZHONGXIABUDESHIHUIRUHUNHE,ZAIJIAOBANZUOYONGXIAKUAISUFANYING。TONGGUODIAOZHENGLIANGJIZHONGHECAODESHIHUIRUTOUJIALIANG,TONGSHIKONGZHILIANGJIZHONGHECAODEJIAOBANSULV,SHIYIJIZHONGHECAOCHUSHUIpHDADAO4—5,ERJIZHONGHECAOCHUSHUIpHDADAO7—8。

3、混合

混合的实质是混凝荆水解产物在水中的扩散问题,使水中胶体颗粒同时脱稳产生凝聚,为取得好的絮凝效果创造条件,也是节省投药量的关键。本工艺采用管式微涡管道混合器作为混合设备,且PAc溶液在输送泵前加入,PAM溶液在输送泵后加入,利用湍流微涡旋和离心惯性效应,实现了PAC、PAM水解产物在废水中的充分扩散,使废水中形成的胶体颗粒得到了更好的脱稳。加药量是根据絮凝沉淀系统出水水质进行调整的,一般控制每立方米废水投加5%PAC药液6一10 L,投加0.5‰
4、絮凝沉淀

BENGONGYICAIYONGLEJICHENGSHIFEISHUIJINGHUAQI,JIANGZHILIUHUNNING、WEIXUNING、ZHONGLICHENJIANG、LIXINFENLI、DONGTAIGUOLV、WUNINONGSUODENGCHULIJISHUYOUJIDIJIEHEJICHENGZAIYITAOSHEBEIZHONG。CHONGFENDILIYONGHUNHEYEZAIJINGHUAQINEIGUANXINGXIAOYINGHETUANLIUJIANQIELI,SHIFEISHUIYANQIEXIANFANGXIANGGAOSUJINRUJINGHUAQIHOUZAIJINGHUAQINEIBUDETESHUJIEGOUXIATONGGUOYASUOSHUANGDIANCENG、XIFUDIANZHONGHE、XIFUJIAQIAO、CHENDIANHEWANGBUDENGZUOYONG,KUAISUXINGCHENGMISHIDEFANHUAHEJIAODADEXUTI,ZAIXIALIHELIXINLIZUOYONGXIA,MISHIDEFANHUAHEJIAODADEXUTIKELIHUADAOZHUIXINGWUNINONGSUOQUNONGSUO,FEISHUIYANGUANBIXIANGXIAXUANLIUDAOYIDINGCHENGDUHOUXIANGZHONGXINKAOLONG,XINGCHENGXIANGSHANGDEXUANLIUJIXUSHANGSHENGJINRUDONGTAIGUOLVQUSHENCHULI,GUOLVHOUDEHEGEFEISHUIZIQINGSHUIGUANDAOJINRUHUIYONGCHIHUIYONGHUOWAIPAI。

5、污泥处理
根据集成式废水净化器监控取样情况合理安排排泥周期,将集成式废水净化器污泥浓缩区的污泥排到污泥水箱,开启污泥输送泵和板框压滤机处理污泥,噩滤水返回中间水箱再处理,当板框压滤机不再进水时,停止污泥输送泵或将污泥导入另一台板框压滤机,按板框压滤机操作程序自动卸渣,滤渣经皮带输送机输送到渣场,定期外运处置。