CN100375712C - Double-formulation polysilicate coagulant preparation method - Google Patents
Double-formulation polysilicate coagulant preparation method Download PDFInfo
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- CN100375712C CN100375712C CNB2005101213805A CN200510121380A CN100375712C CN 100375712 C CN100375712 C CN 100375712C CN B2005101213805 A CNB2005101213805 A CN B2005101213805A CN 200510121380 A CN200510121380 A CN 200510121380A CN 100375712 C CN100375712 C CN 100375712C
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Abstract
The present invention discloses a preparation method of a double-agent polysilicate coagulant, and is characterized in that the method takes one or more kinds of metal salt and / or polymeric metal salt solution which is diluted by water to be with the weight concentration from 5% to 15% measured by metal simple substance and uses mineral acid to regulate pH as agent A; the method takes solution which comprises silicon material and is diluted by the water to be with the weight concentration from 2 to 10% measured by SiO2 as agent B; the agent A and the agent B are respectively packed, when used, the agent A and the agent B are mixed evenly, which causes the mol ratio between silicon dioxide and metal of products which are gotten by mixing the agent A and the agent B is from 1 to 0.5-5.0, and a final polysilicate coagulant is obtained. The polysilicate coagulant prepared by the present invention has the advantages of good coagulation performance, high efficiency of impurity-removing and discoloration, quick alum particle formation, big and dense flocculate and fast settling speed of the flocculate.
Description
Technical field
The present invention relates to a kind of preparation method's of coagulating agent, particularly a kind of double-formulation polysilicate coagulant preparation method.
Background technology
In feedwater and waste water treatment process, coagulation process is to use one of the most general key link.It directly affects operation condition, final outflow water quality and the cost of follow-up flow process, thereby becomes the important research development field of water supply engineering, environmental engineering.The performance of coagulating agent plays conclusive effect in coagulation technology.
Polysilicate coagulant is because of having macromolecular structure and positively charged, therefore has simultaneously as the good adsorption bridge formation ability of organic floculant and charge neutralization ability as inorganic coagulant.Studies show that such coagulating agent has more excellent coagulation performance than polymerize aluminum chloride (PAC), bodied ferric sulfate (PFS) etc., turbidity removal, decolorizing efficiency height, it is rapid to form alumen ustum, and flco is big and closely knit, and sedimentation is fast.
At present, the preparation technology of polysilicate (PSM) flocculation agent can reduce three kinds substantially: high speed shear method, composite algorithm and copolymerization method.
High speed shear method: belong to Canadian Chinese enlightening (Handy) chemical company patented technology.Under shear conditions with mixing such as water glass, sodium aluminate, Tai-Ace S 150, and prepared in reaction polysilicate sulfuric acid aluminium (PASS) at a certain temperature.Be present only sophisticated polysilicate coagulant production technology, product has been widely used in tap water and the wastewater treatment.
Afterwards, software engineering researchers invent went out aluminium salt (or/and molysite, magnesium salts, zinc salt) was incorporated into processing method in the poly-silicate solution, comprised composite algorithm and copolymerization method.Composite algorithm is exactly to make it have certain basicity the metal-salt hydrolytic polymerization earlier to mix with poly-silicic acid again; Copolymerization method is metal-salt directly to be introduced in the poly-silicate solution make metal-salt and the further polymerization of silicic acid.At present, experimental study adopts this method can prepare the product of coagulation performance excellence, but low this two hang-up of not fine as yet solution product stability poor (being easy gelling) and effective concentration, thereby can't carry out suitability for industrialized production and application.
Summary of the invention
The object of the present invention is to provide a kind of effectively, cost is low, good stability, the preparation method of the double-formulation polysilicate coagulant that active constituent content is high.
The technical solution adopted for the present invention to solve the technical problems is:
The preparation method of double-formulation polysilicate coagulant, it is characterized in that this method is that one or more solution with water in vitriol, hydrochloride, polymerised sulphur hydrochlorate or the polysalt hydrochlorate of iron, aluminium, magnesium or zinc are diluted to weight concentration 5%～15% in metal simple-substance, and with inorganic acid for adjusting pH to 0～3, as the A agent; The solution with water of silicon-containing material is diluted to weight concentration 2～10% in SiO2, as the B agent; A, B pack respectively for two doses; During use, A agent and B agent are mixed, making the silicon-dioxide of two doses of mixing of A, B products obtained therefrom and the molar ratio of metal is 1: 0.5～5.0, promptly obtains final polysilicate coagulant.
The polymerised sulphur hydrochlorate or the polysalt hydrochlorate of iron of the present invention, aluminium, magnesium or zinc can adopt bodied ferric sulfate, polymerize aluminum chloride, polyaluminium sulfate etc.Bodied ferric sulfate can utilize titanium dioxide byproduct ferrous sulfate to make, and the polyaluminum sulfate aluminum solutions can adopt 18 water Tai-Ace S 150 to add water and be made into.
Silicon-containing material of the present invention is water glass or silicate class.
A agent pH value of the present invention is preferably 0.5～2.0, and the adjusting of pH value can be adopted sulfuric acid or hydrochloric acid.
The present invention can be in the A agent or/and add additive in the B agent, increasing or to strengthen treatment effect of the present invention, as: if need give/or strengthen the product decolouring, can in the B agent, add additive such as trimeric cyanamide formal etc.; If need give/or strengthen product chemistry oxidative function, can in the metal salt solution of A agent, add other additive as: potassium permanganate, additive join in the solution after metering, mix.
The invention has the beneficial effects as follows: the double-formulation polysilicate coagulant technology of preparing is a completely new concept, at home and abroad as yet not relevant for the preparation method's of double-formulation coagulating agent report and patent.Adopt double-formulation not only thoroughly to solve liquid product and be easy to the agglomerative problem, and the active constituent content of coagulating agent is increased substantially, thereby coagulation effect is better.The polysilicate coagulant of the present invention preparation has long-chain and props up shape structure and positively charged, has simultaneously as the good adsorption bridge formation ability of organic floculant and charge neutralization ability as inorganic coagulant.Thereby, the coagulation performance excellence, turbidity removal, decolorizing efficiency height, it is rapid to form alumen ustum, and flco is big and closely knit, and sedimentation is fast; The two-form polysilicate coagulant of the present invention's preparation, effective constituent concentration height not only, and when mixing, two doses of A, B just begin because of silicic acid activation, thereby do not exist the gelling of silicic acid autohemagglutination to influence the problem of product stability yet, for a kind of new method has been started in the preparation of polysilicate coagulant.
The present invention is further described below in conjunction with embodiment.
Embodiment
Embodiment 1
The preparation polymeric ferrous sulphate solution is prepared alum liquor then earlier, adds 44ml bodied ferric sulfate and 32ml alum liquor more at ambient temperature in reaction vessel, and behind the mixing, the pH value of regulating mixing solutions with sulfuric acid is 0.5, and this mixing solutions is the A agent; Get 17 gram moduluses and be 3.2 water glass and add tap water 83ml and be made into the solution that contains silicon-dioxide 4.5%, this solution is the B agent.By a certain percentage the B agent is slowly poured in the A agent during application, mixed 30～60 minutes, promptly obtain final polysilicate coagulant, the molar ratio (SiO of its silicon-dioxide and metal
2/ M) be 1, be 8～72 hours working life.This coagulating agent can be put in the pending water (or waste water) of coagulation device through dilution (or not diluting).
Embodiment 2
The preparation polymeric ferrous sulphate solution is prepared alum liquor then earlier, adds 34ml bodied ferric sulfate and 45ml alum liquor more at ambient temperature in reaction vessel, and behind the mixing, the pH value of regulating mixing solutions with sulfuric acid is 1.0, and this mixing solutions is the A agent; Get 20 gram moduluses and be 3.2 water glass and add tap water 80ml and be made into the solution that contains silicon-dioxide 7%, this solution is the B agent.By a certain percentage the B agent is slowly poured in the A agent during application, mixed 30～60 minutes, promptly obtain final polysilicate coagulant, the molar ratio (SiO of its silicon-dioxide and metal
2/ M) be 1.5, be 8～72 hours working life.This coagulating agent can be put in the pending water (or waste water) of coagulation device through dilution (or not diluting).
Embodiment 3
The preparation polymeric ferrous sulphate solution is prepared alum liquor then earlier, adds 60ml bodied ferric sulfate and 22ml alum liquor more at ambient temperature in reaction vessel, and behind the mixing, the pH value of regulating mixing solutions with sulfuric acid is 0.05, and this mixing solutions is the A agent; Get 25 gram moduluses and be 3.2 water glass and add tap water 75ml and be made into the solution that contains silica 1 0%, this solution is the B agent.By a certain percentage the B agent is slowly poured in the A agent during application, mixed 30～60 minutes, promptly obtain final polysilicate coagulant, the molar ratio (SiO of its silicon-dioxide and metal
2/ M) be 2.3, be 8～72 hours working life.This coagulating agent can be put in the pending water (or waste water) of coagulation device through dilution (or not diluting).
The performance test experiment
Test experiments 1, with result such as the following table 1 of the product among the embodiment 1 to blue denim dyeing waste water.
The blue denim dyeing waste water result (wastewater volume 250ml) of table 1: embodiment 1 product treatment
| Dosage/ml | 0.40 | 0.55 | 0.70 | 0.85 | 1.00 | 1.15 |
| Colourity is removed rate/% | 62.70 | 66.50 | 68.20 | 70.40 | 78.10 | 70.40 |
| COD removes rate/% | 52.80 | 52.00 | 51.80 | 55.90 | 52.00 | ?52.30 |
| Residual sludge quantity/ml | 15.00 | 16.00 | 17.00 | 17.00 | 17.00 | 18.00 |
As seen from the above table: product of the present invention all has the good effect of removing to COD, the colourity of blue denim dyeing waste water.And the closely knit easy sedimentation of " alumen ustum " particle that generates, residual sludge quantity is little.
Performance test test 2: result such as the table 2 of using the product treatment municipal wastewater of embodiment 1.
Get result (waste water 600ml) behind the product treatment municipal wastewater of table 2: embodiment 1
| Dosage/ml | 0.05 | 0.10 | 0.15 | 0.20 | 0.25 | 0.30 |
| Turbidity is removed rate/% | 53.20 | 72.30 | 78.70 | 83.00 | 95.70 | 80.90 |
| COD removes rate/% | 82.20 | 85.30 | 87.70 | 89.20 | 90.00 | 89.80 |
As seen from the above table: when dosage was 0.25ml, the COD rate of removing reached 90.00%, and the rate of removing of turbidity also reaches 95.7%.
Claims (4)
1. the preparation method of double-formulation polysilicate coagulant, it is characterized in that this method is that one or more solution with water in vitriol, hydrochloride, polymerised sulphur hydrochlorate or the polysalt hydrochlorate of iron, aluminium, magnesium or zinc are diluted to weight concentration 5%～15% in metal simple-substance, and with inorganic acid for adjusting pH to 0～3, as the A agent; The solution with water of silicon-containing material is diluted to SiO
2The weight concentration 2～10% of meter is as the B agent; A, B pack respectively for two doses; During use, A agent and B agent are mixed, making the silicon-dioxide of two doses of mixing of A, B products obtained therefrom and the molar ratio of metal is 1: 0.5～5.0, promptly obtains final polysilicate coagulant.
2. the preparation method of double-formulation polysilicate coagulant according to claim 1 is characterized in that described silicon-containing material is water glass or silicate class.
3. the preparation method of double-formulation polysilicate coagulant according to claim 1 is characterized in that described A agent pH value is 0.5～2.0.
4. the preparation method of double-formulation polysilicate coagulant according to claim 1 is characterized in that in the A agent or/and be added with additive in the B agent.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005101213805A CN100375712C (en) | 2005-12-27 | 2005-12-27 | Double-formulation polysilicate coagulant preparation method |
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| CNB2005101213805A CN100375712C (en) | 2005-12-27 | 2005-12-27 | Double-formulation polysilicate coagulant preparation method |
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| CN1800015A CN1800015A (en) | 2006-07-12 |
| CN100375712C true CN100375712C (en) | 2008-03-19 |
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| CN105883946B (en) * | 2016-06-22 | 2019-03-26 | 南京永禾环保工程有限公司 | A kind of composite water purifying agent and preparation method thereof for chemi-mechanical pulp Sewage advanced treatment |
| CN109626527B (en) * | 2018-12-07 | 2021-08-31 | 江苏永葆环保科技有限公司 | Method for preparing flocculating agent by utilizing high-speed emulsification and shearing |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5503820A (en) * | 1992-05-26 | 1996-04-02 | E. I. Du Pont De Nemours And Company | Method for preparing low-concentration polysilicate microgels |
| CN1240197A (en) * | 1999-03-12 | 2000-01-05 | 符建中 | Integrated production method for polysilics acid metal salt coagulant |
| CN1259923A (en) * | 1997-06-09 | 2000-07-12 | 阿克佐诺贝尔公司 | Polysilicate microgels |
| CN1478806A (en) * | 2002-08-29 | 2004-03-03 | 中国石油化工股份有限公司 | Preparation method of polysilicate flocculant |
-
2005
- 2005-12-27 CN CNB2005101213805A patent/CN100375712C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5503820A (en) * | 1992-05-26 | 1996-04-02 | E. I. Du Pont De Nemours And Company | Method for preparing low-concentration polysilicate microgels |
| CN1259923A (en) * | 1997-06-09 | 2000-07-12 | 阿克佐诺贝尔公司 | Polysilicate microgels |
| CN1240197A (en) * | 1999-03-12 | 2000-01-05 | 符建中 | Integrated production method for polysilics acid metal salt coagulant |
| CN1478806A (en) * | 2002-08-29 | 2004-03-03 | 中国石油化工股份有限公司 | Preparation method of polysilicate flocculant |
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