CN115196797A - 一种钢铁冶炼厂制酸洗涤废水预处理方法 - Google Patents
一种钢铁冶炼厂制酸洗涤废水预处理方法 Download PDFInfo
- Publication number
- CN115196797A CN115196797A CN202110376793.7A CN202110376793A CN115196797A CN 115196797 A CN115196797 A CN 115196797A CN 202110376793 A CN202110376793 A CN 202110376793A CN 115196797 A CN115196797 A CN 115196797A
- Authority
- CN
- China
- Prior art keywords
- steel smelting
- smelting plant
- washing wastewater
- acid
- calcium
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002351 wastewater Substances 0.000 title claims abstract description 27
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 19
- 239000010959 steel Substances 0.000 title claims abstract description 19
- 238000003723 Smelting Methods 0.000 title claims abstract description 18
- 238000005406 washing Methods 0.000 title claims abstract description 16
- 238000002203 pretreatment Methods 0.000 title abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 15
- -1 fluoride ions Chemical class 0.000 claims abstract description 9
- QMQXDJATSGGYDR-UHFFFAOYSA-N methylidyneiron Chemical compound [C].[Fe] QMQXDJATSGGYDR-UHFFFAOYSA-N 0.000 claims abstract description 9
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000011575 calcium Substances 0.000 claims abstract description 8
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 8
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 3
- 238000006115 defluorination reaction Methods 0.000 claims abstract 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
- 239000000843 powder Substances 0.000 claims description 7
- 239000006228 supernatant Substances 0.000 claims description 6
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 5
- 239000000920 calcium hydroxide Substances 0.000 claims description 5
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 4
- MPDDQFGQTCEFIX-UHFFFAOYSA-N [F].[Ca] Chemical compound [F].[Ca] MPDDQFGQTCEFIX-UHFFFAOYSA-N 0.000 claims description 3
- 230000002378 acidificating effect Effects 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- SURQXAFEQWPFPV-UHFFFAOYSA-L iron(2+) sulfate heptahydrate Chemical compound O.O.O.O.O.O.O.[Fe+2].[O-]S([O-])(=O)=O SURQXAFEQWPFPV-UHFFFAOYSA-L 0.000 claims description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims 5
- 229910052799 carbon Inorganic materials 0.000 claims 4
- 229910052742 iron Inorganic materials 0.000 claims 4
- 230000001376 precipitating effect Effects 0.000 claims 2
- 230000035484 reaction time Effects 0.000 claims 2
- 241000143432 Daldinia concentrica Species 0.000 claims 1
- 239000012528 membrane Substances 0.000 abstract description 6
- 230000007797 corrosion Effects 0.000 abstract description 2
- 238000005260 corrosion Methods 0.000 abstract description 2
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 abstract 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 abstract 1
- 230000009615 deamination Effects 0.000 abstract 1
- 238000006481 deamination reaction Methods 0.000 abstract 1
- 239000010802 sludge Substances 0.000 abstract 1
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 8
- 229910052731 fluorine Inorganic materials 0.000 description 6
- 239000011737 fluorine Substances 0.000 description 6
- 238000005554 pickling Methods 0.000 description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 4
- 238000006477 desulfuration reaction Methods 0.000 description 4
- 230000023556 desulfurization Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000003546 flue gas Substances 0.000 description 4
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 2
- 229910001634 calcium fluoride Inorganic materials 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 229910001447 ferric ion Inorganic materials 0.000 description 1
- 229910001448 ferrous ion Inorganic materials 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Images
Classifications
-
- 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
-
- 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
-
- 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
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
-
- 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
- C02F2101/20—Heavy metals or heavy metal compounds
- C02F2101/203—Iron or iron compound
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/02—Specific form of oxidant
- C02F2305/026—Fenton's reagent
Landscapes
- 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)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
本方法采用了一种新的预处理方法来处理钢铁冶炼厂制酸洗涤废水,钢铁冶炼厂制酸洗涤废水成分复杂,含高浓度的氟离子、氯离子、氨氮、COD,现有工艺存在脱氨膜系统堵塞严重、稳定运行难、出水不达标、设备腐蚀、污泥堵塞严重等问题,本预处理方法采用了钙法除氟‑铁碳微电解‑芬顿联合处理来去除钢铁冶炼厂制酸洗涤废水中的绝大多数氟离子以及部分COD,提高了可生化性。后续再进行膜处理除氨氮,通过预处理,减少了膜堵塞问题,缓解了膜处理压力,出水水质也得到了提高,实现了废水回收再利用,节约水资源,减少综合运行,出水可用于钢铁冶炼厂冲刷用水。
Description
技术领域
本发明涉及一种废水处理方法,特别是提供了一种钢铁冶炼厂制酸洗涤废水的预处理方法。
背景技术
钢铁厂烧结烟气中含有大量的SO2,一般使用活性炭吸附法处理,通过吸附塔和解析塔的相互作用与配合,大大提高了活性炭的循环使用效率。可实现了烟气“三脱”(脱硫、脱硝、脱二噁英),脱硫效率达95%以上。活性碳吸附法烟气脱硫在脱除SO2的同时,有着能不同程度脱除废气中的HCl、HF等有害气体、装置占地面积较小、副产品经综合加工后可利用等优点。解析塔在运作时会将原先吸附的二氧化硫再次释放进入水体,一部分用来制成浓硫酸,另一部分便形成了制酸洗涤废水,该废水具有溶液呈无色,pH<1,含有大量黑色悬浮物,具有刺鼻性SO2气味等特点。直接排放这些工业酸性废水,会将管道腐蚀,损坏农作物,伤害水生物,破坏生态环境,危害人体健康。现有工艺膜处理直接处理废水存在着膜堵塞、出水不达标、设备腐蚀严重等问题。因此需要对制酸洗涤废水预处理。
发明内容
本发明的目的提供一种将钢铁冶炼厂制酸洗涤废水处理达到回用的方法,克服了钢铁冶炼厂制酸洗涤废水难处理的困难。
为了达到上述目的,本发明的钢铁冶炼厂制酸洗涤废预水处理方法依次包括以下步骤:根据不同浓度的氟离子加入对应的氢氧化钙粉末,钙氟比取摩尔比0.6:1-0.9:1,并调节pH至7-9,搅拌反应30-60min,沉淀取上清液,加入15-30g/L的铁碳粉末,100-140 rpm/min转速反应2-3h,沉淀取上清液用原水调节pH至3-5,每升加入30%过氧化氢1-2mL并加入与过氧化氢摩尔比0.8:1-1:1.2的七水合硫酸亚铁,100-140 rpm/min常温反应2-3 h。
附图说明:
图一是本发明方法处理钢铁冶炼厂制酸洗涤废水实例工艺流程示意图
具体实施方式:
下面结合实施例对本发明进行详细讲述。
实施例
钢铁冶炼厂制酸洗涤废水首先通过加入氢氧化钙搅拌反应生成氟化钙沉淀去除绝大多数氟离子。
综合考虑出水钙浓度以及除氟效果,采用钙氟摩尔比0.6:1加入氢氧化钙粉末,生成氟化钙后调节pH至8再沉淀取上清液,目的是去除废水中的铁离子和部分亚铁离子,不同浓度的含氟废水处理后氟离子浓度如表1,说明废水氟离子浓度波动对除氟效果影响很小。
表1
序号 | 水质 | F浓度mg/L | 钙氟比0.6:1加氢氧化钙后F浓度mg/L |
1 | 原水 | 2400 | 66.70428072 |
2 | 原水:水=1:2 | 800 | 66.10366919 |
3 | 原水:水=1:1 | 1200 | 67.99650553 |
4 | 原水:水=2:1 | 1600 | 69.81654048 |
5 | 原水:水=5:1 | 2000 | 57.98631334 |
取上清液加入20g/L的铁碳粉末进行铁碳微电解反应2-3 h,去除部分COD和少量氟离子。
通过沉淀将铁碳残渣去除,为了使芬顿反应达到最佳效果且节约成本,利用酸性原水调节pH至3-5,同时为了减少过氧化氢的挥发,温度采用常温,并且反应2-3 h。最终处理效果如表2。
表2
序号 | 水样 | F浓度mg/L | CODmg/L |
1 | 原水 | 2395.8940 | 约1600 |
2 | 出水 | 14.0871 | 约400 |
Claims (5)
1.一种钢铁冶炼厂制酸洗涤废水处理方法,该方法包含以下步骤:根据不同浓度的氟离子加入对应摩尔比的氢氧化钙粉末,钙氟比取摩尔比0.6:1~0.9:1,并调节pH至7~9,搅拌反应30~60min,沉淀取上清液,加入15~30g/L的铁碳粉末,100~140 rpm/min转速反应2~3h,沉淀取上清液用原水调节pH至3~5,每升加入30%过氧化氢1.0~2.0mL并加入与过氧化氢摩尔比0.8:1~1:1.2的七水合硫酸亚铁,100~140 rpm/min转速常温反应2~3 h。
2.根据权利要求1所述的钙法除氟-铁碳微电解-芬顿联合处理钢铁冶炼厂制酸洗涤废水工艺方法,其特征在于,首先利用加入钙氟摩尔比0.6:1~0.9:1的氢氧化钙去除氟离子。
3.根据权利要求1所述的钙法除氟-铁碳微电解-芬顿联合处理钢铁冶炼厂制酸洗涤废水工艺方法,其特征在于,利用成品铁碳球研磨成铁粉进行铁碳微电解反应,铁碳粉的使用量为15~30g/L,反应时间为2~3 h,可深度除氟以及减少部分COD。
4.根据权利要求1所述的钙法除氟-铁碳微电解-芬顿联合处理钢铁冶炼厂制酸洗涤废水工艺方法,其特征在于,通过加入30%过氧化氢1.0~2.0 mL/L并加入与过氧化氢摩尔比为0.8:1~1:1.2的七水合硫酸亚铁产生的芬顿反应,反应pH为3~5,反应时间为2~3 h,降低COD。
5.根据权利要求1所述的钙法除氟-铁碳微电解-芬顿联合处理钢铁冶炼厂制酸洗涤废水工艺方法,其特征在于,使用酸性原水来调节pH,节约成本且出水水质并未出现太大影响。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202110376793.7A CN115196797A (zh) | 2021-04-08 | 2021-04-08 | 一种钢铁冶炼厂制酸洗涤废水预处理方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202110376793.7A CN115196797A (zh) | 2021-04-08 | 2021-04-08 | 一种钢铁冶炼厂制酸洗涤废水预处理方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
CN115196797A true CN115196797A (zh) | 2022-10-18 |
Family
ID=83571691
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202110376793.7A Pending CN115196797A (zh) | 2021-04-08 | 2021-04-08 | 一种钢铁冶炼厂制酸洗涤废水预处理方法 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN115196797A (zh) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007130518A (ja) * | 2005-11-08 | 2007-05-31 | Japan Organo Co Ltd | キレート剤含有水のフッ素・リン処理方法および装置 |
CN102976532A (zh) * | 2012-12-28 | 2013-03-20 | 湘潭大学 | 铁炭内电解共沉淀处理含氟多金属酸性冶炼废水的方法 |
CN103848513A (zh) * | 2012-11-28 | 2014-06-11 | 苏州市环境保护有限公司 | 一种基于芬顿氧化反应的含氟废水处理方法及其装置 |
CN109293070A (zh) * | 2018-11-12 | 2019-02-01 | 湘潭大学 | 一种冶炼烟气脱硫废水处理方法 |
CN209957615U (zh) * | 2019-05-28 | 2020-01-17 | 北京道成维优环境科技有限公司 | 铁碳微电解池及包含其的含有机氟废水处理系统 |
CN111499058A (zh) * | 2020-05-09 | 2020-08-07 | 辽宁工程技术大学 | 微电解-Fenton-石灰混凝联合处理化工含氟废水工艺 |
-
2021
- 2021-04-08 CN CN202110376793.7A patent/CN115196797A/zh active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007130518A (ja) * | 2005-11-08 | 2007-05-31 | Japan Organo Co Ltd | キレート剤含有水のフッ素・リン処理方法および装置 |
CN103848513A (zh) * | 2012-11-28 | 2014-06-11 | 苏州市环境保护有限公司 | 一种基于芬顿氧化反应的含氟废水处理方法及其装置 |
CN102976532A (zh) * | 2012-12-28 | 2013-03-20 | 湘潭大学 | 铁炭内电解共沉淀处理含氟多金属酸性冶炼废水的方法 |
CN109293070A (zh) * | 2018-11-12 | 2019-02-01 | 湘潭大学 | 一种冶炼烟气脱硫废水处理方法 |
CN209957615U (zh) * | 2019-05-28 | 2020-01-17 | 北京道成维优环境科技有限公司 | 铁碳微电解池及包含其的含有机氟废水处理系统 |
CN111499058A (zh) * | 2020-05-09 | 2020-08-07 | 辽宁工程技术大学 | 微电解-Fenton-石灰混凝联合处理化工含氟废水工艺 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN107857426B (zh) | 一种含磷废水综合处理方法 | |
JP5197223B2 (ja) | 水処理システム | |
CN104961304A (zh) | 一种高浓度氟化工废水处理工艺 | |
CN104291538A (zh) | 一种氰化废渣淋溶液处理方法 | |
CN106277480B (zh) | 一种高浓度氨氮废水的处理工艺 | |
CN113559837A (zh) | 一种柱状活性炭载铁复合催化剂及其制备方法和应用 | |
Che et al. | Pretreatment of piggery digestate wastewater by ferric-carbon micro-electrolysis under alkalescence condition | |
CN103739128A (zh) | 高浓度难降解有机废水的预处理系统和预处理方法 | |
CN110921993A (zh) | 一种发电厂含氨废水的处理方法 | |
CN106186563A (zh) | 一种适用于高酸度冶金工业废水的处理方法 | |
CN101428887B (zh) | 吹脱-水解法处理镍氨废水 | |
CN115196797A (zh) | 一种钢铁冶炼厂制酸洗涤废水预处理方法 | |
CN103951016A (zh) | 一种利用铁炭复合剂处理含氮废水的方法 | |
CN104150678A (zh) | 一种含氮有机废水的处理方法 | |
CN102464422B (zh) | 一种工业废水的预处理方法 | |
CN113184972B (zh) | 一种序批式反应去除废水中有机污染物的方法 | |
JP2011062656A (ja) | 窒素含有排水処理方法 | |
CN1907881A (zh) | 一种难降解含腈有机废水的处理方法 | |
CN209619123U (zh) | 一种处理高氨氮废水的系统 | |
CN107473519A (zh) | 一种超高浓度氨氮废水的生化处理方法 | |
CN114835335A (zh) | 一种电池工艺中含氮含氟废水除氟控钙的系统和方法 | |
CN105540851B (zh) | 一种处理高氨氮制药废水的方法 | |
CN112266131A (zh) | 工业废水处理方法 | |
CN113526778A (zh) | 一种高浓度工业废水的处理工艺 | |
KR100733332B1 (ko) | 고농도 불산 및 질산을 함유하는 폐수처리 방법 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20221018 |
|
WD01 | Invention patent application deemed withdrawn after publication |