CN114349228A - 一种污水电化学除硫方法 - Google Patents
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- 239000010865 sewage Substances 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000006477 desulfuration reaction Methods 0.000 title claims description 5
- 230000023556 desulfurization Effects 0.000 title claims description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 21
- 239000011593 sulfur Substances 0.000 claims abstract description 21
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000004062 sedimentation Methods 0.000 claims abstract description 14
- 239000000701 coagulant Substances 0.000 claims abstract description 11
- 229910052742 iron Inorganic materials 0.000 claims abstract description 9
- 239000010802 sludge Substances 0.000 claims abstract description 8
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 3
- 229940037003 alum Drugs 0.000 claims description 3
- 238000005345 coagulation Methods 0.000 claims description 3
- 230000015271 coagulation Effects 0.000 claims description 3
- 238000005188 flotation Methods 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- 239000002351 wastewater Substances 0.000 claims 2
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 239000002244 precipitate Substances 0.000 description 4
- 229910001448 ferrous ion Inorganic materials 0.000 description 3
- 229910001385 heavy metal Inorganic materials 0.000 description 3
- 238000002848 electrochemical method Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- -1 sulfur ions Chemical class 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008394 flocculating agent Substances 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46109—Electrodes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46109—Electrodes
- C02F2001/46133—Electrodes characterised by the material
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/101—Sulfur compounds
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
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Abstract
一种污水电化学除硫方法,包括以下步骤:将含S2‑的污水通入铁为阳极的电解池;阳极电解产生Fe2+与S2‑反应生成FeS;加入混凝剂和絮凝剂使FeS絮凝,沉降处理形成污泥;分离污泥,得到除硫后的水。本发明具有低污染、低成本、自动控制、高适应性的优点。
Description
技术领域
本发明涉及污水除硫,尤其涉及一种污水电化学除硫方法。
背景技术
目前,现有的污水除硫技术主要有:气提吹脱法,将硫以硫化氢的形式吹脱至空气中,该法严重污染环境,已基本不用;重金属盐沉淀法,向污水中投加重金属,与硫形成沉淀而去除,该法处理成本高,重金属会带来二次污染;氧化法,向被处理污水中投加氧化剂,将低价硫氧化成单质硫,以硫磺的形式排出,达到除硫的目的,该法投资和维护成本过高,不适用于小型处理装置。
发明内容
鉴于目前污水除硫存在的上述不足,本发明提供一种污水电化学除硫方法,能够达到低污染、低成本、自动控制、高适应性的技术效果。
为达到上述目的,本发明的实施例采用如下技术方案:
一种污水电化学除硫方法,包括以下步骤:将含S2-的污水通入铁为阳极的电解池;阳极电解产生Fe2+与S2-反应生成FeS;加入混凝剂和絮凝剂使FeS絮凝,沉降处理形成污泥;分离污泥,得到除硫后的水。
依照本发明的一个方面,所述电解池的阴极极板也为铁板。
依照本发明的一个方面,所述混凝剂为聚合氯化铝、明矾的任一种。
依照本发明的一个方面,所述混凝剂的添加量为30-300ppm。
依照本发明的一个方面,所述絮凝剂为PAM。
依照本发明的一个方面,所述絮凝剂的添加量为1-20ppm。
依照本发明的一个方面,所述的沉降设备为平流沉降池、混凝沉降罐、旋流沉降罐、油浮选分离罐等的任一种。
本发明实施的优点:
低污染:由于所述电解池的阳极极板为铁板,利用亚铁离子沉降硫离子,污染较低;
低成本:本发明通过电化学方法除硫,工艺成本低;
自动控制:本发明通过电化学方法除硫,可通过控制电流实现反应进度自动控制;
高适应性:可实施本发明的设备规模可大可小,适应性高。
具体实施方式
对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
一种污水电化学除硫方法,包括以下步骤:将含S2-的污水通入铁为阳极的电解池;阳极电解产生Fe2+与S2-反应生成FeS;加入混凝剂和絮凝剂使FeS絮凝,沉降处理形成污泥;分离污泥,得到除硫后的水。
一般而言,电极极板间距采用1-5cm为合宜,本实施例中采用2cm;电压采用3-36V均可,本实施例中采用12V。
所述电解池的阴极极板也为铁板。在其它实施例中,它也可以为铜板、铝板、铂板等其它金属板。本实施例中,阴极极板为铁板具有两个优势,其一是对电源的正负极没有要求,正负极倒换不影响工艺。其二是正负极可以定时倒换。阳极上亚铁离子与氢氧根离子等阴离子会形成沉淀,有一部分会沉淀到极板上,长期积累容易堵塞水路。阴阳极倒换后,阴极上的沉淀中的亚铁离子会逐渐被还原,从而使沉淀溶解。
所述混凝剂为聚合氯化铝、明矾的任一种。
所述混凝剂的添加量为30-300ppm。
所述絮凝剂为PAM。
所述絮凝剂的添加量为1-20ppm。
所述的沉降设备为平流沉降池、混凝沉降罐、旋流沉降罐、油浮选分离罐等的任一种。
以上所述,仅为本发明的具体实施方式,但本发明的保护范围并不局限于此,任何熟悉本领域技术的技术人员在本发明公开的技术范围内,可轻易想到的变化或替换,都应涵盖在本发明的保护范围之内。因此,本发明的保护范围应以所述权利要求的保护范围为准。
Claims (7)
1.一种污水电化学除硫方法,其特征在于,包括以下步骤:
将含S2-的污水通入铁为阳极的电解池;
阳极电解产生Fe2+与S2-反应生成FeS;
加入混凝剂和絮凝剂使FeS絮凝,沉降处理形成污泥;
分离污泥,得到除硫后的水。
2.根据权利要求1所述的一种污水电化学除硫方法,其特征在于,所述电解池的阴极极板也为铁板。
3.根据权利要求1所述的一种污水电化学除硫方法,其特征在于,所述混凝剂为聚合氯化铝、明矾的任一种。
4.根据权利要求3所述的一种污水电化学除硫方法,其特征在于,所述混凝剂的添加量为30-300ppm。
5.根据权利要求1所述的一种污水电化学除硫方法,其特征在于,所述絮凝剂为PAM。
6.根据权利要求5所述的一种污水电化学除硫方法,其特征在于,所述絮凝剂的添加量为1-20ppm。
7.根据权利要求1所述的一种污水电化学除硫方法,其特征在于,所述加入混凝剂和絮凝剂进行沉降处理在沉降设备中进行,所述的沉降设备为平流沉降池、混凝沉降罐、旋流沉降罐、油浮选分离罐等的任一种。
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0871597A (ja) * | 1994-09-06 | 1996-03-19 | Ishigaki Mech Ind Co | 汚泥中の有害金属の分離方法 |
KR20110017223A (ko) * | 2009-08-13 | 2011-02-21 | 한국원자력연구원 | 오일 중의 황 제거방법 |
CN103043840A (zh) * | 2013-01-18 | 2013-04-17 | 西安石油大学 | 一种等离子体处理油田含硫采出水的方法 |
CN104071929A (zh) * | 2014-06-20 | 2014-10-01 | 张家港格林台科环保设备有限公司 | 一种高效去除水中硫化物的方法及其专用装置 |
CN207356640U (zh) * | 2017-10-23 | 2018-05-15 | 宝莫(北京)环保科技有限公司 | 一种含硫工业废水除硫设备 |
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2020
- 2020-06-10 CN CN202010522241.8A patent/CN114349228A/zh active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0871597A (ja) * | 1994-09-06 | 1996-03-19 | Ishigaki Mech Ind Co | 汚泥中の有害金属の分離方法 |
KR20110017223A (ko) * | 2009-08-13 | 2011-02-21 | 한국원자력연구원 | 오일 중의 황 제거방법 |
CN103043840A (zh) * | 2013-01-18 | 2013-04-17 | 西安石油大学 | 一种等离子体处理油田含硫采出水的方法 |
CN104071929A (zh) * | 2014-06-20 | 2014-10-01 | 张家港格林台科环保设备有限公司 | 一种高效去除水中硫化物的方法及其专用装置 |
CN207356640U (zh) * | 2017-10-23 | 2018-05-15 | 宝莫(北京)环保科技有限公司 | 一种含硫工业废水除硫设备 |
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