亚博买球

印染废水处理工艺

2019-07-24 17:45:12 admin 89

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FEISHUIFENLEI

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②ZHULIANFEISHUI,SHUILIANGDA,WURANWUNONGDUGAO,ZHUYAOHANYOUXIANWEISU、GUOSUAN、LAZHI、YOUZHI、JIAN、BIAOMIANHUOXINGJI、HANDANHUAHEWUDENG。FEISHUIJIANXINGHENQIANG,SHUIWENGAO,CHENGHESE,CODYUBODHENGAO,DAMEISHENGSHUQIANHAOKE。HUAXUEXIANWEIZHULIANFEISHUIDEWURANJIAOQING;

③PIAOBAIFEISHUI,SHUILIANGDA,WURANJIAOQING,ZHUYAOHANYOUCANYUDEPIAOBAIJI、SHAOLIANGCUSUAN、CAOSUAN、LIUDAILIUSUANNADENG;

④SIGUANGFEISHUI,HANJIANLIANGGAO,NaOHHANLIANGZAI3%-5%,DUOSHUYINRANCHANGTONGGUOZHENGFANONGSUOHUISHOUNaOH,SUOYISIGUANGFEISHUIYIBANHENSHAOPAICHU,JINGGUOGONGYIDUOCIZHONGFUSHIYONGZUIZHONGPAICHUDEFEISHUIRENGCHENGQIANGJIANXING,BOD、COD、SSJUNJIAOGAO;

⑤RANSEFEISHUI,SHUIZHIDUOBIAN,YOUSHIHANYOUSHIYONGGEZHONGRANLIAOSHIDEYOUDUWUZHI(LIUHUAJIAN、TUJIUSHI、BENAN、LIUSUANTONG、FENDENG),JIANXING,PHYOUSHIDA10YISHANG(CAIYONGLIUHUA、HAIYUANRANLIAOSHI),HANYOUYOUJIRANLIAO、BIAOMIANHUOXINGJIDENG。SEDUHENGAO,ERSSSHAO,CODJIAOBODGAO,KESHENGHUAXINGJIAOCHA;

⑥YINHUAFEISHUI,HANJIANGLIAO,BOD、CODGAO;

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⑧JIANJIANLIANGFEISHUI:SHIDILUNFANGZHENSIJIANJIANLIANGGONGXUCHANSHENGDE,ZHUYAOHANDILUNSHUIJIEWUDUIBENERJIA SUAN、YIERCHUNDENG,QIZHONGDUIBENERJIASUANHANLIANGGAODA75%。JIANJIANLIANGFEISHUIBUJINpHZHIGAO(YIBAN>12),ERQIEYOUJIWUNONGDUGAO,JIANJIANLIANGGONGXUPAIFANGDEFEISHUIZHONGCODCrKEGAODA 9WANmg/L,GAOFENZIYOUJIWUJIBUFENRANLIAOHENNANBEISHENGWUJIANGJIE,CIZHONGFEISHUISHUGAONONGDUNANJIANGJIEYOUJIFEISHUI。

 

导读

排放标准

印染废水的排放标准为《纺织染整工业水污染物排放标准》(GB 4287-1992)。

DIYILEI:NENGZAIHUANJINGHUODONGZHIWUTINEIJIXU,DUIRENTIJIANKANGCHANSHENGZHANGYUANYINGXIANGDEYOUHAIWUZHI,ZUIGAOYUNXUPAIFANGNONGDULIEBIAO5-4。

DIERLEI:QIZHANGYUANYINGXIANGXIAOYUDIYILEIDEYOUHAIWUZHI,ZUIGAOYUNXUPAIFANGNONGDULIEBIAO5-5。

BIAO5-4

XUHAO

YOUHAIWUZHIMINGCHENG

ZUIGAOYUNXUPAIFANGNONGDU(HAOKE/SHENG)

1

GONGJIQIWUJIHUAHEWU

0.05(ANHgJI)

2

GEJIQIWUJIHUAHEWU

0.1(ANCdJI)

3

LIUJIAGEHUAHEWU

0.5(ANCr6+JI)

4

SHENJIQIWUJIHUAHEWU

0.5(ANAsJI)

5

QIANJIQIWUJIHUAHEWU

1.0(ANPbJI)

BIAO5-5

XUHAO

YOUHAIWUZHIHUOXIANGMUMINGCHENG

ZUIGAOYUNXUPAIFANGNONGDU

1

PH

6-9

2

XUANFUWU(SHUILIPAIHUI、XIMEISHUIDENG)

500HAOKE/SHENG

3

SHENGWUXUYANGLIANG(5TIAN20℃

HAOKE/SHENG

4

HUAXUEXUYANGLIANG(ZHONGGESUANJIAFA)

100HAOKE/SHENG

5

LIUHUAWU

1HAOKE/SHENG

6

HUIFAXINGFEN

0.5HAOKE/SHENG

7

QINGHUAWU(YICN-JI)

0.5HAOKE/SHENG

8

YOUJILIN

0.5HAOKE/SHENG

9

SHIYOULEI

10HAOKE/SHENG

10

TONGJIQIHUAHEWU

1HAOKE/SHENG(ANCuJI)

11

XINJIQIHUAHEWU

5HAOKE/SHENG(ANZNJI)

12

FUDEWUJIHUAHEWU

10HAOKE/SHENG(ANFJI)

13

XIAOJIBENLEI

5HAOKE/SHENG

14

BENANLEI

3HAO/SHENG


1

处理方法     

根据纺织印染行业自身的特点,印染废水的处理,应尽量采用重复回用和综合 利用措施,与纺织印染生产工艺改革相结合,尽量减少水碱以及其它印染助剂的用量,对废水中的染料,桨料进行回收.例如,对于合成纤维及含合成纤维75% 以上的织物采用干法印花工艺,可以消除生产过程中的印花废水;在使用酸性媒染染料过 程中,如果用硝酸钠或双氧水代替重铬酸钾全长为氧化剂,就可以消除废水中的铬的污染.许多印染企业普遍将丝光工艺排放的碱液用于煮炼工序作为煮炼液,煮炼 工序排放的废碱液用于退桨工序,多次重复使用可以大大减少整个过程中排放的总碱量.对于含有硫化染料的污水,可以首先在反应锅内加酸,使废水中的硫化氢释 放,然后经过沉淀过滤后回收再用.对含有还原染料和分散染料污水,可采用超滤技术将非水溶性染料颗粒回收使用.通过以上这些生产技术的革新,可以有效减少 纺织印染行业的污染物排放量.同时也为生产企业节约了许多原料,增加企业的经济效益.

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1.HUNNINGYUCHULI

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对印染污水的混凝处理,关键在于选择合适的絮凝剂,常规适用于印染废水处理的絮凝剂主要有硫酸铝,硫酸铁,氯化铁,这些絮凝剂在处理一些非水溶性染料废水是效果明显,例如分散染料,还原染料,硫化染料,COD和色度的去除率真都非常高.            


处理工艺该废水处理的工艺废水--调节池--水解酸化--生物接触氧化--中沉池--
  |
  pac
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  该处理工艺中要用到的污水处理药剂为聚丙烯酰胺和聚合氯化铝,用次氯酸钙作为脱色剂 。该工艺重点是好氧生物接触氧化,其主要功效是降解有机物。在聚丙烯酰胺的选择上混凝处理一般选择阴离子聚丙烯酰胺和非离子聚丙烯酰胺,污泥脱水选择阳离 子聚丙烯酰胺。阳离子选择离子度相对较低的阳离子型号,分子量基本在1000万以上效果较佳。
纺织工业发展主要阻碍之一是环保节能(低碳)问题,环保的主要问题是废 水,而约80%纺织废水来自于印染行业。统计数据显示,2008年纺织工业废水排放量23亿吨,居各工业行业第3位,占全国工业废水排放量的 10.60%。纺织工业排放废水中化学需氧量(CODCr)排放量31.4万吨,居各工业行业第4位,占全国工业废水CODCr的7.76%。该数据是对 规模以上企业的统计数据,实际数据可能要大很多。实际上印染行业是以中小企业为主的竞争性行业,中小企业比重占99.6%,非公有制企业占95%,大量小 企业数据并未统计在内。若以纤维加工量的70%需进行印染加工计,则年排放废水约在30亿吨左右。


废水回用

   

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设计原则

1、ZHIXINGYOUGUANHUANBAOGUIDING,QUEBAOGEXIANGCHUSHUIZHIBIAOFUHEGUOJIAHEDIFANGYOUGUANSHUIZHIBIAOZHUNDEYAOQIU;

2、XUANZEBIJIAOCHENGSHUDECHULIGONGYI,XITONGYUNXINGJIANDANKEKAO、ANQUAN、CAOZUOFANGBIAN,JINLIANGJIANSHAOYUNXINGCHENGBENJITOUZIFEIYONG;

3、XUANZECHULIGONGYILIUCHENGDUAN、KEXINGXING、NAICHONGJI、CHULIXIAOGUOWENDING;

4、CAOZUOGUANLIFANGBIAN、BIANYUWEIHU;

5、JIANSHEDIDIANJIYONGDIYINGCHONGFENKAOLVYONGHUDEXIANYOUTIAOJIAN,GENJUCHANGFANGYAOQIU,ZHIDINGDIDIANYONGDI,BINGYINGKAOLVGUANWANGDEHELIBUZHI;

6、SHUICHULIZHANYINGWUERCIWURAN,YIJIANSHAODUIZHOUWEISHENGHUOHUANJINGDEYINGXIANG。


回用工艺

      印染废水回用工艺中,以石灰作为PH调节剂,以硫酸亚铁作为混凝剂,故出 水铁含量较高,不能直接用于回用,但本项目是以物化+生化工艺为前段污水处理工艺的,特别是经过接触氧化池强化曝气,水中的二价铁均转化为三价铁,在出水 中形成了氢氧化铁微絮体,这也是污水处理站出水浑浊、有色度的主要原因。

只要在出水中添加一定量的碱式氯化铝和PAM,就可将氢氧化铁微絮体结合成较大的絮体,通过高效过滤,即可除去污水中铁,故本项目采用AFF不对称纤维过滤器,AFF是一种集加药、微絮凝、沉淀和过滤为一体的高效过滤设备,其特点是滤速快(滤速是砂滤的10倍以上)、过滤精度高(过滤精度为5um,是一般砂滤的4倍)、反冲容易、管理方便,在本项目中,AFF主要是作为除铁和中水中悬浮物的设备。

经过AFF过滤的中水,COD指标仍为100mg/l左右,而且主要为可溶性COD(SCOD),直接影响中水回用价值,同时有机物对反渗透膜使用寿命影响甚大,必须通过适当的处理工艺,使其降至30mg/l以下。

故采用膜生物流化床(MBFB)工艺,利用经过特殊处理的陶瓷膜,将膜分离系统与高负荷生物流化床工艺相结合,以获取稳定的处理水质。该工艺已在美国、日本、英国、德国、南非、澳大利亚等国家和地区的污水和废水处理领域得到推广和应用。

经过MBFB工艺处理的出水,除电导率指标外,其水质可达到纺织印染行业 车间回用水的行业要求的标准,可直接用于生产过程的水洗、皂洗和冲洗等车间,大约可达到60%的回用率。同时MBFB工艺也可作为反渗透工艺的前处理工 段,MBFB可直接进入反渗透膜进行脱盐,而不必经过复杂的保安过滤和超滤工段。

采用先进的中水回用处理工艺,在原有污水达标排放的基础上,进一步降低水 中铁、COD浓度,一方面可直接作为回用水,用于水洗、皂洗和前段冲洗等对水质要求不高的工段;另一方面处理后的中水,可直接通过反渗透或离子交换脱盐, 免除了反渗透工艺中多级保安过滤和超滤工艺,减少了前处理费用,延长RO膜使用寿命。