CN1210818A - Poly ferric silicon type compound inorganic high molecular flocculant and its preparing method - Google Patents
Poly ferric silicon type compound inorganic high molecular flocculant and its preparing method Download PDFInfo
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- CN1210818A CN1210818A CN 97112174 CN97112174A CN1210818A CN 1210818 A CN1210818 A CN 1210818A CN 97112174 CN97112174 CN 97112174 CN 97112174 A CN97112174 A CN 97112174A CN 1210818 A CN1210818 A CN 1210818A
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Abstract
The flocculant is prepared through the preparation of polymerized ferric chloride of different alkalization degree by using ferric salt and sodium bicarbonate as raw material, oligomer silicic acid as stabilizer, then the composition of polymerized ferric chloride and polymerized silicic acid is, mixed through stirring and reacted and aged to obtain the product. The flocculant has excellent electric neutralization capacity and high bridging effect. It is abumdant in raw material, simple in production condition, easy to apply and has no toxic problem.
Description
The present invention relates to a kind of polymerization iron-polymeric silicicacid compound inorganic high molecular flocculant PFSI and preparation method thereof, belong to the technical field of water treatment with flocculation agent.
In municipal administration, industry, civilian water and wastewater treatment, coagulation technology is one of technology that wherein obtains widespread use the most.Along with increasingly sharpening of environmental pollution, people grow with each passing day to the in-depth of water environment pollution problem understanding and to the requirement that improves self quality of life and standard, and the control of water environment pollution causes enough attention of people gradually with improvement and obtains the progress of each side.Coagulation technology can be with removing the particulate form impurity in the water body and strengthen the removal of solute in the water body and the solid-liquid separation of mud etc., thereby demand and development trend are more widely arranged.Coagulating agent is one of key link of coagulation technology.Can divide into two big classes, promptly inorganic and organic coagulating agent by its chemical property.Can also continue to divide into low cohere agent and polymeric flocculant by the molecular weight size simultaneously.Because there is toxicity problem in organic polymer coargulator, and high being difficult to of price widely apply.Inorganic coagulant has nontoxic (or low toxicity), inexpensive, many-sided advantage such as raw material is easy to get, and occupies extremely important status in coagulation technology, is widely used always.
The tradition coagulating agent belongs to low cohere agent, and being mainly aluminium system is salt with iron, as Tai-Ace S 150, iron trichloride etc.Have in its use that speed of reaction is slow, medicine consumption high and low temperature low-cloudy water treatment effect is not good, and because of a large amount of acid that dissociates out in its hydrolytic process, need and white lime or other coagulant aids use together, increased expense and sludge quantity.Along with intensification to inorganic coagulant mechanism of action understanding, on the inorganic aluminium of tradition, molysite basis, developed new class water treatment agent-inorganic polymer flocculant, from the appearance and the later development in the sixties and improve in the process, representing the leading development trend of inorganic coagulant, the trend of alternative traditional inorganic salt class is being arranged in giving water treatment.Inorganic polymer flocculant progressively forms series of products as the developing main flow of inorganic coagulant.Wherein poly-platform aluminum chloride, polyaluminium sulfate, the existing fixed product of bodied ferric sulfate, activated silicic acid prepares at the scene as coagulant aids, and it improves product and has directly also obtained certain exploitation as coagulating agent.Other products then still is in and grinds the examination stage.But by flat aluminium is that coagulating agent has toxicity problem, obtains paying attention to for the application of ferric flocculant.The usefulness that how to improve iron and be inorganic polymer flocculant becomes emphasis and the difficult problem place in the inorganic coagulant research.
Poly-ferric chloride is one of principal item of inorganic polymer flocculant.In the laboratory research its exist form and function to be of long duration, come across in the document existing twenties years with bodied ferric sulfate simultaneously with trade name, but fail as formal product always or produce by batch and be on sale throughout in market.Its reason is that the stability of product is not high, unstability precipitation will take place in a short time and weakens or loses efficiency of coagulation.The mechanism and quantitative rule of precipitation unstability takes place in polymerization iron, still lacks deep Dan Ming at present.In general, except factors such as concentration, temperature, nucleus, the counter anion composition plays decisive role.According to this viewpoint, the relevant document of reference can be summarized from following three class materials and be removed to seek to hinder heavy stablizer: (1) inorganic anion such as sulfate radical, phosphate radical etc.; (2) organic anion such as various organic acid, tensio-active agent etc.; (3) organic polyelectrolyte or polymkeric substance such as polyalcohols, glycan etc.Their suppress that mechanism that precipitation forms may be the complex coordination effect between itself and the monomer iron and the further polymerization that influences iron hydroxyl oxide compound, also may directly combine and stop its further polymerization with polymerization iron polymer, or, remain more to be studies have shown that because other reasons has changed solubleness etc.But be not all can play the composition of the heavy effect of resistance can be as stablizer, they also need to satisfy following condition: (1) does not influence polymerization iron in use as the function of flocculation agent; (2) nontoxic, in water treatment, do not have side effects; (3) easy to use, cheap or the like.
CN87101246A introduces Japanese a kind of water treatment flocculant and method.It adopts high-polymeric silicic acid and little metal salt to use together.The advantage of this flocculation agent is to have stronger ability of aggregation, and the water treatment expense is low.But the stability of high-polymeric silicic acid is lower, aggregates into gel easily and loses coagulation performance.To have introduced with blast furnace water slag be main material production polysilicate flocculant and polymeric silicicacid-polymeric aluminum flocculating agent for CN1050709A and CN105905A in addition.Have that raw material is easy to get, production cost is low, efficiency of coagulation be better than polymerize aluminum chloride and wherein aluminium content reduced half.
It is not high to the objective of the invention is to overcome poly-ferric chloride stability, gather close iron and polymeric silicicacid flocculation agent advantage in one, a kind of efficient poly ferric silicon type compound inorganic high molecular flocculant and preparation method thereof is provided.Realizing that method that the present invention taked is is stablizer with oligomeric attitude silicic acid, is the poly-ferric chloride of feedstock production different polymerization degree with iron trichloride, sodium bicarbonate, then compound with the polymeric silicicacid of high-polymerization degree, makes its reaction 1-4 hour, promptly gets flocculant product.
Raw material can use hydrochloric acid or sulfuric acid pickling waste liquid carries out the oxidation preparation.When preparing, stablizer and polymeric silicicacid also can use gas washing in SA production.
At the different quality situation, can suitably regulate the polymerization degree and ferrosilicon ratio.
The advantage that gained inorganic polymer flocculant of the present invention has is:
1 is iron-silicon based flocculating agent, compares with the aluminium based flocculating agent not have toxicity problem.
2. liquid product, long preservative period, easy to use, compare with the conventional iron salt coagulant and to greatly reduce corrodibility.
3. raw material is easy to get, and usefulness is remarkable, can regulate prescription easily according to water quality characteristics and form applied range.
Embodiment one:
Take the iron trichloride of 30ml iron content 160g/L, (oligomeric attitude silicic acid stablizer mixes with the hydrochloric acid of 90ml water, 10ml16% and the water glass of the siliceous 10.8g/L of 100ml to add the oligomeric attitude silicic acid of 10ml stablizer, its pH value is about 1.8), the sodium bicarbonate that then adds 400ml water and 60ml84g/L promptly gets poly-ferric chloride solution.60g service water glass was taken in the preparation of polymeric silicicacid, with the hydrochloric acid of 10ml16% and the activation of 450ml water 2 hours.Poly-ferric chloride solution and polymerization of silicic acid solution are mixed platform stirring reaction slaking 1-4 hour promptly.
Embodiment two
Take the iron trichloride of 150ml iron content 100g/L, (oligomeric attitude silicic acid stablizer mixes with the hydrochloric acid of 90ml water, 10ml16% and the water glass of the siliceous 10.8g/L of 100ml to add the oligomeric attitude silicic acid of 50ml stablizer, its pH value is about 1.8), the sodium bicarbonate that then adds 300ml84g/L promptly gets poly-ferric chloride solution.300g service water glass was taken in the preparation of polymeric silicicacid, with the hydrochloric acid of 50ml16% and the activation of 250ml water 1 hour.With poly-ferric chloride solution and the slaking of polymerization of silicic acid solution mixing stirring reaction 1-4 hour promptly.
Embodiment three:
Take the iron trichloride of 150ml iron content 160g/L, (oligomeric attitude silicic acid stablizer mixes with the hydrochloric acid of 90ml water, 10ml16% and the water glass of the siliceous 10.8g/L of 100ml to add the oligomeric attitude silicic acid of 50ml stablizer, its pH value is about 1.8), the sodium bicarbonate that then adds 100ml water and 200ml84g/L promptly gets poly-ferric chloride solution.140g service water glass was taken in the preparation of polymeric silicicacid, with the hydrochloric acid of 25ml16% and the activation of 370ml water 1 hour.With poly-ferric chloride solution and the slaking of polymerization of silicic acid solution mixing stirring reaction 1-4 hour promptly.
This flocculant and the contrast of ferric trichloride purifying water effect:
Former water pH6.5,25 ℃ of temperature
The dosage raw water turbidity is surplus turbid
(Fe mg/L) (ntu) (ntu)
This flocculant 0.3 55 23
Ferric trichloride 0.3 55 30
This flocculant 1.0 55 7.2
Iron trichloride 1.0 55 24
This flocculation agent 3.3 55 0.6
Iron trichloride 3.3 55 3
This shows that its purifying water effect of flocculation agent of this law preparation significantly is better than iron trichloride.
Claims (1)
- A kind of poly ferric silicon type compound inorganic high molecular flocculant and preparation method thereof, it is characterized in that using molysite, sodium bicarbonate is a raw material, is stablizer with the oligomeric silicic acid, prepares the poly-ferric chloride of different basicities, then mutually compound with polymeric silicicacid, mix the stirring reaction slaking and get.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97112174 CN1210818A (en) | 1997-06-13 | 1997-06-13 | Poly ferric silicon type compound inorganic high molecular flocculant and its preparing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97112174 CN1210818A (en) | 1997-06-13 | 1997-06-13 | Poly ferric silicon type compound inorganic high molecular flocculant and its preparing method |
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| Publication Number | Publication Date |
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| CN1210818A true CN1210818A (en) | 1999-03-17 |
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| CN 97112174 Pending CN1210818A (en) | 1997-06-13 | 1997-06-13 | Poly ferric silicon type compound inorganic high molecular flocculant and its preparing method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102774941A (en) * | 2012-08-28 | 2012-11-14 | 艾有年 | Preparation method of solid polymeric ferric chloride silicate flocculant |
| CN102942246A (en) * | 2012-12-10 | 2013-02-27 | 王艳芬 | Process for preparing polyferric flocculant |
| CN103466771A (en) * | 2013-09-27 | 2013-12-25 | 中国环境科学研究院 | Method for preparing oxidized form polysilicic acid ferro-aluminum coagulant |
| CN104445553A (en) * | 2014-11-25 | 2015-03-25 | 神州华美（北京）科技有限公司 | Composite water purifying agent and preparation method and application thereof |
| CN110282715A (en) * | 2019-07-16 | 2019-09-27 | 闽江学院 | A kind of preparation and application of polyquaternium In-situ reaction improved PFS |
| CN110980905A (en) * | 2019-12-23 | 2020-04-10 | 广东慧信环保有限公司 | Preparation method of polymeric aluminum ferric sulfate solution with high stability |
-
1997
- 1997-06-13 CN CN 97112174 patent/CN1210818A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102774941A (en) * | 2012-08-28 | 2012-11-14 | 艾有年 | Preparation method of solid polymeric ferric chloride silicate flocculant |
| CN102774941B (en) * | 2012-08-28 | 2015-05-27 | 艾有年 | Preparation method of solid polymeric ferric chloride silicate flocculant |
| CN102942246A (en) * | 2012-12-10 | 2013-02-27 | 王艳芬 | Process for preparing polyferric flocculant |
| CN103466771A (en) * | 2013-09-27 | 2013-12-25 | 中国环境科学研究院 | Method for preparing oxidized form polysilicic acid ferro-aluminum coagulant |
| CN103466771B (en) * | 2013-09-27 | 2017-01-18 | 中国环境科学研究院 | Method for preparing oxidized form polysilicic acid ferro-aluminum coagulant |
| CN104445553A (en) * | 2014-11-25 | 2015-03-25 | 神州华美（北京）科技有限公司 | Composite water purifying agent and preparation method and application thereof |
| CN110282715A (en) * | 2019-07-16 | 2019-09-27 | 闽江学院 | A kind of preparation and application of polyquaternium In-situ reaction improved PFS |
| CN110282715B (en) * | 2019-07-16 | 2021-08-31 | 闽江学院 | Preparation and application of polyquaternium in-situ composite modified polymeric ferric sulfate |
| CN110980905A (en) * | 2019-12-23 | 2020-04-10 | 广东慧信环保有限公司 | Preparation method of polymeric aluminum ferric sulfate solution with high stability |
| CN110980905B (en) * | 2019-12-23 | 2022-07-05 | 江门市志升环保科技有限公司 | Preparation method of polymeric aluminum ferric sulfate solution with high stability |
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