CN100500589C - Boron-containing polysilic aluminum ferric sulfate composite flocculant - Google Patents
Boron-containing polysilic aluminum ferric sulfate composite flocculant Download PDFInfo
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- CN100500589C CN100500589C CNB2007101176824A CN200710117682A CN100500589C CN 100500589 C CN100500589 C CN 100500589C CN B2007101176824 A CNB2007101176824 A CN B2007101176824A CN 200710117682 A CN200710117682 A CN 200710117682A CN 100500589 C CN100500589 C CN 100500589C
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Abstract
The present invention is composite flocculant of boron-containing aluminum iron silicosulfate polymer for treating coking waste water, and belongs to the field of environment protecting engineering technology. The boron-containing aluminum iron silicosulfate polymer has the molar ratio Fe/Si of 0.4-0.6, Si/(Al+Fe) of 0.7-0.9, and B/Si of 0.25-0.35. The composite flocculant is compounded through the following steps: compounding 2-3 wt% concentration distilled water solution of sodium silicate, regulating pH value with sulfuric acid and sodium hydroxide to 2-3, and polymerizing at room temperature for 20-40 min; and adding ferric sulfate, aluminum sulfate and sodium tetraborate in certain molar ratio and through stirring, and standing to activate for 1-2 days. Treating waste water with the composite flocculant has low flocculant throwing amount of 9-11 mg/l and no need of regulating the pH value of the waste water, and the treated water has suspended matter less than 70mg/l and COD concentration lower than 150mg/l.
Description
Technical field:
The invention belongs to field of environmental engineering, relate to a kind of boron-containing polysilic aluminum ferric sulfate composite flocculant, be particularly suitable for Treatment of Wastewater in Coking.
Background technology:
At present, in wastewater treatment, inorganic polymer flocculant commonly used such as polymerize aluminum chloride (PAC) and bodied ferric sulfate (PFS) respectively have its advantage in flocculation process.But handle the trade effluent that contains complicated pollutent with these medicaments, not only consumption is big, uneconomical practicality, and also treatment effect is also bad, and every index of waste water is difficult to up to standard.
In recent years, become focus in order to develop and use various compound coagulants, as ferric sulfate of polymerized silica Treatment of Coking Effluent Research on effect
[1]In, directly in second pond water, throw PFSS400mg/L, add oxygenant M180B0.4g/L then, and the pH value during with oxidation is controlled at 6.5～7.5, coking second pond water COD after above flocculation-oxide treatment reduces to 125.3mg/L from 1837.6mg/L, the pH value meets emission request about 7.3; The and for example preparation of boracic ferric sulfate of polymerized silica flocculation agent and flocculating property thereof
[2]In, when wastewater pH behind coke-oven plant's biochemistry about 6.0, when the PFSSB add-on is 20mg/L, turbidity removal rate and percent of decolourization reach respectively more than 93% and 60%.
The treatment effect of the above flocculation agent of comparative analysis: ferric sulfate of polymerized silica
[1]Handle coking second pond water, not only dosing reaches 400mg/L too greatly, also wants the treatment technology of combined oxidant, the uneconomical practicality of treatment technology, and technology is also complicated, is not easy to operation; The boracic ferric sulfate of polymerized silica
[2]Treatment of Wastewater in Coking, turbidity removal rate and percent of decolourization are better, but in the coking chemical waste water pollutant emission standard the Pollutant Treatment effect up to standard that requires not obvious.
At above relative merits, for stability and the treatment effect that improves flocculation agent.Water outlet COD problem of higher at coking chemical waste water after biochemical treatment prepares a kind of novel flocculant, makes it little at using dosage, just the flocculating effect of coking chemical waste water can be reached the requirement of discharging standards under a single operation link.
[1] Liu Hong, person of outstanding talent etc. continues. ferric sulfate of polymerized silica Treatment of Coking Effluent Research on effect. and industrial safety and environmental protection, 2006,32 (6): 14-16.
[2] Yu Danqing, Yan Jiabao, all tiny streams. the preparation and the flocculating property thereof of boracic ferric sulfate of polymerized silica flocculation agent. chemical industry environmental protection, 2006,26 (1): 70-73.
Summary of the invention
The present invention seeks to stability and treatment effect in order to improve flocculation agent.Water outlet COD problem of higher at coking chemical waste water after biochemical treatment prepares a kind of novel flocculant, makes it little at using dosage, just the flocculating effect of coking chemical waste water can be reached the requirement of discharging standards under a single operation link.
The boron-containing polysilic aluminum ferric sulfate composite flocculant that a kind of Treatment of Wastewater in Coking is used, the mol ratio that it is characterized in that boron-containing polysilic aluminum ferric sulfate (PFASSB) is Fe/Si=0.4～0.6, Si/ (Al+Fe)=0.7～0.9, B/Si=0.25～0.35, the compound method of flocculation agent is as follows:
Take by weighing a certain amount of water glass, adding distil water is made into 2～3% solution, regulates its PH with sulfuric acid and sodium hydroxide, and making the activation pH value is 2～3, polymerization 20～40min under the room temperature; Add ferric sulfate, Tai-Ace S 150, sodium tetraborate then in molar ratio, and leave standstill after in agitator, stirring, can obtain the PFASSB flocculation agent after 1～2 day to be activated.
The PFASSB flocculation agent is when being used for Treatment of Wastewater in Coking, the process flocculation treatment: the turbidity of water outlet is reduced to 0.363NTU by original 10NTU, suspended substance quality concentration is reduced to 10mg/L by the 82mg/L of former water, has reached the primary standard of GB8978-1996 " integrated wastewater discharge standard "; The COD mass concentration is reduced to 145.9mg/L by 227.76mg/L, reached the secondary standard of GB8978-1996 " integrated wastewater discharge standard ", and the dosage of boron-containing polysilic aluminum ferric sulfate flocculation agent only is 9～11mg/L.
Advantage or positively effect
In the flocculation pre-treatment, the PFASSB dosage is minimum, is 9～11mg/L only, can uncomfortable waste water ph during processing.Handle the suspended substance quality concentration＜70mg/L of back water outlet, reached the primary standard of " integrated wastewater discharge standard "; COD mass concentration＜150mg/L has reached the secondary standard of " integrated wastewater discharge standard "; The Analysis on Mechanism of flco shows composite flocculation agent PFASSB except the effect that the charge neutrality with simple flocculation agent, absorption and net are caught, and also has the adsorption bridging of owned polymkeric substance and the effect that the precipitation net is caught.
Embodiment:
Embodiment 1
The mol ratio of boron-containing polysilic aluminum ferric sulfate (PFASSB) is Fe/Si=0.4, Si/ (Al+Fe)=0.7, and B/Si=0.28, the compound method of flocculation agent is as follows:
Take by weighing a certain amount of water glass, adding distil water is made into 2% solution, regulates its PH with sulfuric acid and sodium hydroxide, and making the activation pH value is 2, polymerization 20min under the room temperature; Add ferric sulfate, Tai-Ace S 150, sodium tetraborate then in molar ratio, and leave standstill after in agitator, stirring, can obtain the PFASSB flocculation agent after 1 day to be activated.
Embodiment 2
The mol ratio of boron-containing polysilic aluminum ferric sulfate (PFASSB) is Fe/Si=0.5, Si/ (Al+Fe)=0.8, and B/Si=0.3, the compound method of flocculation agent is as follows:
Take by weighing a certain amount of water glass, adding distil water is made into 2.5% solution, regulates its PH with sulfuric acid and sodium hydroxide, and making the activation pH value is 3, polyase 13 0min under the room temperature; Add ferric sulfate, Tai-Ace S 150, sodium tetraborate then in molar ratio, and leave standstill after in agitator, stirring, can obtain the PFASSB flocculation agent after 1 day to be activated.
Embodiment 3
The mol ratio of boron-containing polysilic aluminum ferric sulfate (PFASSB) is Fe/Si=0.6, Si/ (AI+Fe)=0.9, and B/Si=0.35, the compound method of flocculation agent is as follows:
Take by weighing a certain amount of water glass, adding distil water is made into 3% solution, regulates its PH with sulfuric acid and sodium hydroxide, and making the activation pH value is 2.5, polymerization 40min under the room temperature; Add ferric sulfate, Tai-Ace S 150, sodium tetraborate then in molar ratio, and leave standstill after in agitator, stirring, can obtain the PFASSB flocculation agent after 2 days to be activated.
Claims (1)
1. boron-containing polysilic aluminum ferric sulfate composite flocculant that Treatment of Wastewater in Coking is used, the mol ratio that it is characterized in that boron-containing polysilic aluminum ferric sulfate composite flocculant is Fe/Si=0.4～0.6, Si/ (Al+Fe)=0.7～0.9, B/Si=0.25～0.35, the compound method of boron-containing polysilic aluminum ferric sulfate composite flocculant is as follows:
Take by weighing a certain amount of water glass, adding distil water is made into 2～3% solution, regulates its pH value with sulfuric acid and sodium hydroxide, and making activation pH value is 2～3, polymerization 20～40min under the room temperature; Add ferric sulfate, Tai-Ace S 150, sodium tetraborate then in molar ratio, and leave standstill after in agitator, stirring, obtain boron-containing polysilic aluminum ferric sulfate composite flocculant after 1～2 day to be activated.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11577975B2 (en) * | 2019-07-16 | 2023-02-14 | University Of Science And Technology Beijing | Method for controlling bio-slimes in a clean circulating water system through a physical-chemical-superconducting high gradient magnetic separation coupling process |
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| CN101746868B (en) * | 2008-12-17 | 2013-05-29 | 沈阳工业大学 | Composite flocculant for treating oily wastewater |
| CN101823783B (en) * | 2009-03-04 | 2011-10-05 | 中国石油天然气股份有限公司 | Preparation method of polysilicate boride flocculant |
| CN102336457B (en) * | 2010-07-22 | 2013-02-13 | 中国石油天然气股份有限公司 | Comprehensive utilization method of in-situ crystallization mother liquor |
| CN103204574B (en) * | 2013-03-23 | 2014-06-04 | 北京化工大学 | Preparation method and application of cellulose graft boracic polyaluminum ferric silicate composite flocculant |
| CN104098164B (en) * | 2014-07-27 | 2016-05-18 | 西南石油大学 | The synchronous silica removal of a kind of refinery waste water is except the method for COD |
| CN104445236B (en) * | 2014-12-10 | 2016-08-17 | 上海应用技术学院 | A kind of polymer aluminium silicate zinc flocculant and its preparation method and application |
| CN105502606A (en) * | 2016-01-17 | 2016-04-20 | 济南大学 | Aggregated inorganic iron flocculant prepared from abandoned warm paste |
| CN109095572A (en) * | 2017-06-21 | 2018-12-28 | 中国石油化工股份有限公司 | Polysilicate aluminum ferric sulfate flocculant, preparation method and application |
| CN112875969A (en) * | 2021-04-14 | 2021-06-01 | 铜陵瑞莱科技有限公司 | Method for treating wastewater from iron oxide pigment production |
| CN113336236B (en) * | 2021-06-18 | 2022-12-02 | 北京科技大学 | Solid waste based polysilicate aluminum ferric composite coagulant and preparation method and application thereof |
| CN114988987A (en) * | 2022-06-29 | 2022-09-02 | 陕西华泰生物精细化工有限公司 | Extraction method of peach carin phenol |
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| US11577975B2 (en) * | 2019-07-16 | 2023-02-14 | University Of Science And Technology Beijing | Method for controlling bio-slimes in a clean circulating water system through a physical-chemical-superconducting high gradient magnetic separation coupling process |
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Effective date of registration: 20090724 Address after: Beijing, Xueyuan Road, Haidian District No. 30: 100083 Co-patentee after: Beijing Maierde Technology Co., Ltd. Patentee after: University of Science and Technology Beijing Address before: Beijing, Xueyuan Road, Haidian District No. 30: 100083 Patentee before: University of Science and Technology Beijing |
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Granted publication date: 20090617 Termination date: 20210621 |