CN1079945A - Inorganic compounded flocculante for water treatment and preparation method thereof - Google Patents
Inorganic compounded flocculante for water treatment and preparation method thereof Download PDFInfo
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- CN1079945A CN1079945A CN 93111867 CN93111867A CN1079945A CN 1079945 A CN1079945 A CN 1079945A CN 93111867 CN93111867 CN 93111867 CN 93111867 A CN93111867 A CN 93111867A CN 1079945 A CN1079945 A CN 1079945A
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Abstract
The present invention is to provide the water treatment inorganic polymer flocculant that contains aluminium, calcium, iron, the isoionic polymeric form subsalt of magnesium, particularly wherein also contain the active silicic acid composition, help increasing flocs unit volume and solid degree, accelerate settling velocity, improve rate of descent, make the purifying treatment effect of multiple industry or sanitary wastewater, sewage more satisfied.
Description
What the present invention relates to is inorganic composite flocculant that is used for water treatments such as trade effluent, sanitary sewage and preparation method thereof.
Along with industrial expansion, avoid polluting for the protection environment, various trade effluents and sanitary sewage emission standards are improved constantly, also more and more higher to the water supply quality requirement of various process waters and domestic water.This has all also proposed more and more higher He more and more urgent requirement to water treatment.In various material for water treatment and method, use at most, make simple and convenient, with low cost thereby the easiest large-scale industrial production and use be still the inorganic type material, be that to mainly contain the flocculation agent of effective constituent the most general wherein to contain aluminium chlorohydroxide.To this existing institute introduction, and also provide a kind of a kind of flocculation agent that contains the aluminium chlorohydroxide composition of being become of reacting by calcium aluminate, hydrochloric acid, oxygenant and water as Chinese patent 90106151.4.Find in the use that this flocculation agent still remains at aspects such as removing of COD, BOD and colourity to be improved, the production process improvements of also still needing.
The object of the present invention is to provide a kind of water treatment effect can further improve, produce more simple, thereby the lower inorganic type composite flocculation agent of cost.
Composite flocculant for water treatment of the present invention is main effective constituent with the aluminium chlorohydroxide of high molecular polymerization attitude still, also contain iron, calcium, the magnesium compound (comprising alkali formula muriate) of high molecular polymerization attitude simultaneously, and especially also contain the active silicic acid composition or/and subsulphate.Wherein the content (weight %) of each component in flocculation agent is: polymeric form aluminium chlorohydroxide (in aluminium sesquioxide) 10～12, polymeric form alkali formula ferric polysulfate (in ferric oxide) 1～2, polymeric form basic calcium (in calcium oxide) 2～4, polymeric form alkali formula magnesium salts (in oxygen magnesium) 0.6～3, active silicic acid 0.2～1, all the other are water and a small amount of admissible impurity.
The preparation of the above-mentioned flocculation agent of the present invention, can be with aluminium vanadine, technical hydrochloric acid, a small amount of sulfuric acid and water are raw material, with 20～30 parts of (weight, as follows) hydrochloric acid with after 2～6 parts of sulfuric acid mix, 15～25 parts of aluminium vanadine are slowly added, stir, and constantly to add total amount be 50～70 parts water, to prevent that bumping is towards still, and be used to control the temperature of this thermopositive reaction, keep being no more than 130 ℃ and be advisable.Behind the stirring reaction 0.5～1.5 hour, continue to stir 3～5 hours, and it is lowered the temperature naturally, this is the activation treatment stage of active silicic acid.Gained is the said flocculant product of the present invention.Contain a large amount of aluminium, calcium, iron, magnesium component and silicon-dioxide in the aluminium vanadine raw material.Through above-mentioned acid treatment process, the muriate of aluminium, calcium, iron, magnesium that has the flocculation agent effect in formation is or/and in the high molecular polymer of vitriol, also formed the active silicic acid of colloidal, and this is one of important feature of flocculation agent of the present invention.Studies show that, the churning time that prolongs activation stage helps improving the activation degree of active silicic acid, simultaneously for keeping the permanent stability of this active silicic acid in product, prevent that its hydrolysis from generating silicate, should reduce alkalimetal ion such as sodium, potassium in the solution as far as possible, especially reducing these ionic introducings in step of reaction is very useful to increasing its activation degree and improving activation stability.
In the flocculation process of active silicic acid in the flocculation agent of the present invention when water treatment,, strengthened absorption bridging ability, had directly and significant effects increasing established flocs unit volume because the hydroxyl chain in its structure can fully stretch.Experimental observation shows, has this active silicic acid to exist, and can make the flocs unit volume increase about 10 times, and 0.05～0.1 millimeter when promptly its diameter can be by general flocculation agent increases to 0.8～1 millimeter, and the flocs unit particle is solid, can obviously accelerate settling velocity, and sedimentation is complete.If can be used with polymer coagulant aidss such as polyacrylamides, can further make the flocs unit volume diameter reach 3～5 millimeters.This is that significant especially meaning is arranged for handling as the contour turbidity water of water on municipal effluent, the tap water.
Except that active silicic acid, experimental result also shows, the change of other component content in the flocculation agent of the present invention, also can change the handling property of some aspect, thereby can make it in handling some specific sewage, stronger specific aim be arranged, for example, improve the aluminium vanadine consumption in the raw material, after increasing the aluminium solubility rate in the product, effect is preferably arranged to handling papermaking midcourse wastewater and brewage waste water; Increase the content of magnesium component in the flocculation agent, then to handle printing and dyeing, chemical fiber waste water is favourable, can reach the purpose that reduces consumption and improve effect.
With containing with Al
2O
3The above-mentioned flocculation agent of the present invention of the polymeric aluminium chlorohydroxide of meter～12% is handled the result of papermaking midcourse wastewater and the contrast of aforementioned Chinese patent literature report data sees Table 1.By table as seen, remove at BOD
5The decreasing ratio aspect a little less than outside the bibliographical information value, other index is higher than literature value mostly.
Handle the test-results of floating refining, dyeing dyeing waste water and see Table 2 with containing the above-mentioned flocculation agent of the present invention of counting 3% polymeric form alkali formula magnesium salts with MgO.
The test-results of handling city domestic sewage with the above-mentioned flocculation agent of the present invention who contains active silicic acid about 0.8% sees Table 3.
Above result shows that all flocculation agent of the present invention is all satisfactory to the purifying treatment effect of various wastewater and sewage, and environment protection is had significant meaning.
What below introduce is example as flocculation agent of the present invention, but its should not to be considered as be the restriction that the scope of the invention is constituted.
Example 1:
20 parts of (weight) technical hydrochloric acids are mixed with 6 parts of vitriol oils place reactor, add 15 parts of aluminium vanadine powder, stirring reaction, add 65 parts in water gradually, to prevent that bumping is no more than 130 ℃ towards still and control reaction temperature, after the insulation reaction 1 hour, the cooling stir-activating is 4～5 hours naturally, gets the flocculation agent finished product.Component target detects, and trioxygen-containingization two aluminium 10%(are weight in the product), ferric oxide 1.5%, magnesium oxide 0.7%, calcium oxide 3%, active silicic acid 1%, other impurity～2%, all the other are water.The aluminium salt polymerization degree height that this is routine, active silicic acid content height, water on the tap water of suitable treatment municipal effluent and high turbidity.
Example 2:
With 20 parts of the aluminium vanadine mixture stirring reaction in reactor with 18 parts of technical hydrochloric acids and 5 parts of vitriol oils, the same example of method adds 62 parts in water altogether.Insulation reaction is after half an hour, and grand naturally temperature continued stir-activating 3 hours, got the flocculation agent finished product.Wherein contain aluminum oxide 12%, ferric oxide 1.8%, magnesium oxide 0.8%, calcium oxide 3.5%, active silicic acid 0.5% and small amount of impurities, all the other are water.Aluminium in this routine flocculation agent, ferrous components solubility rate height are applicable to the higher waste water of COD such as papermaking midcourse wastewater and black liquor and beer waste water and malting effluent.
Example 3:
The same example of raw material and working method only adds 2 parts of MgO again in raw material.The composition of products obtained therefrom is: aluminum oxide 12%, and ferric oxide 1.8%, magnesium oxide 3%, calcium oxide 3.5%, active silicic acid 0.5%, all the other are small amount of impurities and water.Mg content height in this routine flocculation agent, outstanding suitable treatment printing and dyeing, chemical fibre and dyestuff industry waste water.
Table 1
Claims (3)
1, a kind of muriatic inorganic macromolecule compound composition of alkali formula that contains aluminium, calcium, iron ion is used for the composite flocculation agent of water treatment, it is characterized in that consisting of (weight %)
Polymeric form aluminium chlorohydroxide 10～12 in aluminium sesquioxide
Polymeric form ferric subsulfate 1～2 in ferric oxide
Polymeric form basic calcium 2～4 in calcium oxide
Polymeric form alkali formula magnesium salts 0.6～3 in magnesium oxide
Active silicic acid 0.2～1
Water surplus.
2, a kind of preparation method of composite flocculation agent as claimed in claim 1, it is characterized in that 15～25 parts of (being weight) aluminium vanadine powder are dropped in the mixture of 20～30 parts of hydrochloric acid and 2～6 parts of vitriol oils, stirring reaction, continuous adding total amount is 50～70 parts a water in the reaction, prevent bumping and keep temperature of reaction≤130 ℃, react after 0.5～1.5 hour, in its natural temperature-fall period, continue to stir 3～5 hours.
3, method as claimed in claim 2 is characterized in that said hydrochloric acid is technical hydrochloric acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93111867 CN1079945A (en) | 1993-06-25 | 1993-06-25 | Inorganic compounded flocculante for water treatment and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93111867 CN1079945A (en) | 1993-06-25 | 1993-06-25 | Inorganic compounded flocculante for water treatment and preparation method thereof |
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| Publication Number | Publication Date |
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| CN1079945A true CN1079945A (en) | 1993-12-29 |
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| CN 93111867 Pending CN1079945A (en) | 1993-06-25 | 1993-06-25 | Inorganic compounded flocculante for water treatment and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1305776C (en) * | 2004-08-27 | 2007-03-21 | 南昌东方星河纳米科技有限公司 | Aeration activating water processing agent and its producing process |
| CN100412014C (en) * | 2006-11-27 | 2008-08-20 | 武汉路德科技有限责任公司 | Sludge drying agent and its preparing method |
| CN101830546A (en) * | 2010-04-13 | 2010-09-15 | 沈阳化工学院 | Poly-aluminum chloride-magnesium printing and dyeing wastewater coagulant and preparation method thereof |
| CN102126758A (en) * | 2011-04-22 | 2011-07-20 | 中国科学院生态环境研究中心 | Method for preparing efficient nano ferric oxide drinking water type flocculants |
-
1993
- 1993-06-25 CN CN 93111867 patent/CN1079945A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1305776C (en) * | 2004-08-27 | 2007-03-21 | 南昌东方星河纳米科技有限公司 | Aeration activating water processing agent and its producing process |
| CN100412014C (en) * | 2006-11-27 | 2008-08-20 | 武汉路德科技有限责任公司 | Sludge drying agent and its preparing method |
| CN101830546A (en) * | 2010-04-13 | 2010-09-15 | 沈阳化工学院 | Poly-aluminum chloride-magnesium printing and dyeing wastewater coagulant and preparation method thereof |
| CN101830546B (en) * | 2010-04-13 | 2011-10-12 | 沈阳化工学院 | Poly-aluminum chloride-magnesium printing and dyeing wastewater coagulant and preparation method thereof |
| CN102126758A (en) * | 2011-04-22 | 2011-07-20 | 中国科学院生态环境研究中心 | Method for preparing efficient nano ferric oxide drinking water type flocculants |
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