CN111908710A - 一种含酚废水处理*** - Google Patents

一种含酚废水处理*** Download PDF

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CN111908710A
CN111908710A CN202010636622.9A CN202010636622A CN111908710A CN 111908710 A CN111908710 A CN 111908710A CN 202010636622 A CN202010636622 A CN 202010636622A CN 111908710 A CN111908710 A CN 111908710A
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苏华
汤亚勇
严惠琴
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Abstract

本申请涉及一种含酚废水处理***,所述***包括:均质池、隔油池、气浮/吹脱池、超滤装置一、超滤装置二、氧化池、蒸发装置、厌氧池、A/O生化装置、BAF装置、混凝池、过滤罐、消毒池、二沉池、萃取塔、循环装置、回用水池,将隔油、吹脱处理后的废水用超滤装置处理,并将其废水进行氧化脱氰,最终提高了废水处理效果及出水效果。

Description

一种含酚废水处理***
技术领域
本发明属于废水处理领域,具体涉及一种含酚废水***。
背景技术
煤化工废水中含有复杂的成分,其中含有高浓度的酚类物质,该类废水如果不恰当处理,会产生严重的环境危害,而煤制油废水又是煤化工废水中的一种典型废水,煤制油生产过程中排放大量的废水,这类废水中含有大量的酚类、烷烃类、芳香烃类、杂环类、氨氮和氰等有毒有害物质,且废水色度大,因此处理难度大、处理成本高,长期制约着煤制油行业的发展。
CN103232135B公开了一种煤制油废水的处理装置及方法,但其处理过程中仅仅忽略了煤制油废水中高盐分、高毒性的现实情况,按照其工艺处理废水,生化效率极低,难以达到“零排放”的目的。
CN103121776A则公开了一种以臭氧氧化降解煤制油高浓度废水经生化处理出水中污染物,并提高可生化性的水处理工艺,但该工艺主要采用臭氧氧化的方式对有机物进行去除,成本高,是一种只能用于煤制油废水生化处理的后续工艺。
同时煤化工工业中产生的含酚废水中含有少量氰类物质,如果不在处理前将该类物质去除,会对后续工艺产生严重危害,导致整个处理工艺难以正常运行。
因此,有必要提出一种能够适应含酚、含氰的煤制油废水处理***。
发明内容
本发明的目的是提供一种含酚废水处理***。
为了解决上述技术问题,本发明公开了一种含酚废水处理***,所述***包括:均质池1、隔油池2、气浮/吹脱池3、超滤装置一41、超滤装置二42、氧化池5、蒸发装置6、厌氧池71、A/O生化装置72、BAF装置73、混凝池74、过滤罐75、消毒池76、二沉池8、萃取塔9、循环装置91、回用水池10,所述均质池1、隔油池2、气浮/吹脱池3、超滤装置一41依次连接,所述超滤装置一41的淡水口连通所述氧化池5,所述氧化池5连通所述超滤装置42,所述超滤装置二42淡水口连通所述蒸发装置6,所述超滤装置二42浓水口连通所述二沉池8;
所述超滤装置一41浓缩口连通所述萃取塔9,所述萃取塔9排液口连通所述A/O生化装置72,所述A/O生化装置72连通二沉池8,所述二沉池8依次连通BAF装置73、混凝池74、过滤罐75、消毒池76、回用水池10;
所述萃取塔9设置循环装置91。
进一步地,所述氧化池内设置氧化还原电位检测装置;
进一步地,所述氧化池5与所述超滤装置42之间设置管道混合装置;
进一步地,所述管道混合装置连通所述二沉池8和/或厌氧装置6;
进一步地,所述隔油池包括静置隔油池和/或机械化澄清除油池;
进一步地,所述气浮/吹脱装置处理中气浮的吸气量:0.3L/(m3水﹒min)~0.7L/(m3水﹒min),气液比:3.0%~5.5%,气体压力:0.6MPa~0.7MPa,时间为0.2-0.4h;吹脱气水比为2000∶1,水力负荷为2.5m3/m3·h,吹脱时间为0.1-0.2h;
进一步地,所述气浮与吹脱采用气浮-吹脱-气浮-吹脱-气浮交替运行;
进一步地,所述氧化池为设置两级分别是一级氧化池和二级氧化池,调节一级氧化池的pH为10-11,向废水中投加氧化剂,调节氧化还原电位为300~330,第二级调节pH值至8~9,向所述废水中加入氧化剂,控制废水氧化还原电位为620~650;
进一步地,所述蒸发装置产生的水蒸气输送至所述消毒池、气浮/吹脱池、隔油池;
进一步地,所述消毒池采用臭氧消毒;
进一步地,气浮/吹脱塔与超滤池一之间设置多介质过滤装置;
进一步地,废水进入所述均质池1前进行预处理,所述预处理包括两级格栅过滤。
本发明的煤制油废水零排放处理工艺,至少具有以下优点:
1.隔油处理后采用气浮/吹脱工艺进行脱氨处理,气浮、吹脱交替运行,总体降低了气浮和吹脱的处理时间,提高了吹脱效率,同时实现了废水中油渣的清除;
2.气浮/吹脱工艺后的进行超滤处理,超滤工艺可以将废水中的盐分及有机物有效分离,从而阻止了废水中盐分对生化工艺的影响,提高了生化效率;
3.由于煤制油废水中含氰,含盐废水中若不除氰,会影响下一步处理工艺,将超滤池一出水引入氧化池对其进行二级氧化处理,可以破氰的同时,将部分有机物氧化降解;
4.氧化池后经过超滤池二处理,浓液输送至厌氧池处理,滤出液则进行蒸发结晶处理,将废水中的盐分充分回收;
5.混凝处理后设置沸石过滤,充分去除废水中的色度、微粒等物质,经消毒后即可以收集进入回用水池进行回用;
6.设置管道混合器,将污泥与氧化处理后的废水进行混合,吸附了废水中的有机物(经氧化降解为小分子有机物),使得超滤装置二出水水质显著提高。
附图说明
图1为一种含酚废水处理***示意图。
具体实施方式
下面通过实施例对本发明做进一步的详细说明,以令本领域技术人员参照说明书文字能够据以实施。
应当理解,本文所使用的诸如“具有”,“包含”以及“包括”术语并不排除一个或多个其它元件或其组合的存在或添加。
实施例1
某煤制油厂废水:
一种煤制油废水零排放处理工艺,包括以下步骤:
(1)含酚废水经过预处理后进入均质池1,并调节pH至5.8-6.2,均质待处理;
(2)均质后的含酚废水输送至隔油池除油;
(3)气浮/吹脱处理:除油后的废水输送至气浮/吹脱池进行气浮、吹脱处理,所述气浮/吹脱处理中气浮的吸气量:0.6L/(m3水﹒min),气液比:3.0%~5.5%,气体压力:0.6MPa~0.7MPa,气浮时间为0.2h;吹脱气水比为2000∶1,水力负荷为2.5m3/m3·h,吹脱时间为0.1h,所述气浮与吹脱采用气浮-吹脱-气浮-吹脱-气浮交替运行,所述气浮吹脱塔中投加PAM,所述PAM投加量为0.01kg/m3废水;
(4)气浮/吹脱处理后的废水输送至超滤池一中,得到超滤出水和超滤浓水;
(5)超滤池一的浓水输送至萃取池进行萃取得到萃余相;
(6)萃余相依次输送至A/O生化池、二沉池、BAF生化池、混凝池、过滤罐及消毒池进行处理,最终废水输送至回用水池;
(7)所述超滤出水输送至氧化池进行氧化,氧化后的废水输送至超滤池二进行过滤,所述超滤池二的浓液输送至厌氧池进行厌氧处理,厌氧出水输送至步骤(6)的二沉池,所述氧化池为设置两级分别是一级氧化池和二级氧化池,调节一级氧化池的pH为10-11,氧化还原电位为300~330,第二级调节pH值至8~9,向所述废水中加入氧化剂,控制废水氧化还原电位为620~650;
(8)超滤池二出水输送至蒸发装置进行蒸发结晶。
项目mg/L 总酚 pH BOD5 COD 总氮 总氰 氟化物
原水 10000 9.3 13200 35600 5600 48 89
常规工艺出水 1000 8.7 690 1200 320 29 43
本申请工艺出水 120 7.6 122 350 65 0.3 9
实施例2
处理条件同实施例1,将二沉池或厌氧池中得到的污泥输送至管道混合装置,超滤装置二分离效率显著提高,超滤装置二出水中有机物含量大大降低。
COD(mg/L) BOD(mg/L) TC(mg/L)
实施例1超滤装置二出水 269 150 370
实施例2超滤装置二出水 132 65 140
尽管本发明的实施方案已公开如上,但其并不仅仅限于说明书和实施方式中所列运用,它完全可以被适用于各种适合本发明的领域,对于熟悉本领域的人员而言,可容易地实现另外的修改,因此在不背离权利要求及等同范围所限定的一般概念下,本发明并不限于特定的细节和这里示出与描述的实施例。

Claims (10)

1.一种含酚废水处理***,其特征在于,所述***包括:均质池(1)、隔油池(2)、气浮/吹脱池(3)、超滤装置一(41)、超滤装置二(42)、氧化池(5)、蒸发装置(6)、厌氧池(71)、A/O生化装置(72)、BAF装置(73)、混凝池(74)、过滤罐(75)、消毒池(76)、二沉池(8)、萃取塔(9)、循环装置(91)、回用水池(10),所述均质池(1)、隔油池(2)、气浮/吹脱池(3)、超滤装置一(41)依次连接,所述超滤装置一(41)的淡水口连通所述氧化池(5),所述氧化池(5)连通所述超滤装置(42),所述超滤装置二(42)淡水口连通所述蒸发装置(6),所述超滤装置二(42)浓水口连通所述二沉池(8);
所述超滤装置一(41)浓缩口连通所述萃取塔(9),所述萃取塔(9)排液口连通所述A/O生化装置(72),所述A/O生化装置(72)连通二沉池(8),所述二沉池(8)依次连通BAF装置(73)、混凝池(74)、过滤罐(75)、消毒池(76)、回用水池(10);
所述萃取塔(9)设置循环装置(91)。
2.如权利要求1所述的含酚废水处理***,其特征在于,所述氧化池(5)内设置氧化还原电位检测装置。
3.如权利要求1所述的含酚废水处理***,其特征在于,所述氧化池(5)与所述超滤装置(42)之间设置管道混合装置。
4.如权利要求3所述的含酚废水处理***,其特征在于,所述管道混合装置连通所述二沉池(8)和/或厌氧装置(6)。
5.如权利要求1所述的含酚废水处理***,其特征在于,所述隔油池包括静置隔油池和/或机械化澄清除油池。
6.如权利要求1所述的含酚废水处理***,其特征在于,所述气浮/吹脱池(3)处理中气浮的吸气量:0.3L/(m3水﹒min)~0.7L/(m3水﹒min),气液比:3.0%~5.5%,气体压力:0.6MPa~0.7MPa,时间为0.2-0.4h;吹脱气水比为2000∶1,水力负荷为2.5m3/m3·h,吹脱时间为0.1-0.2h。
7.如权利要求6所述的含酚废水处理***,其特征在于,所述气浮/吹脱池(3)采用气浮-吹脱-气浮-吹脱-气浮交替运行。
8.如权利要求1所述的含酚废水处理***,其特征在于,所述氧化池(5)为设置两级分别是一级氧化池和二级氧化池,调节一级氧化池的pH为10-11,向废水中投加氧化剂,调节氧化还原电位为300~330,第二级调节pH值至8~9,向所述废水中加入氧化剂,控制废水氧化还原电位为620~650。
9.如权利要求1所述的含酚废水处理***,其特征在于,所述蒸发装置(6)产生的水蒸气输送至所述消毒池、气浮/吹脱池、隔油池。
10.如权利要求1所述的含酚废水处理***,其特征在于,所述消毒池(76)采用臭氧消毒。
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