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Flocculant for low-residue drinking water treatment and preparation method thereof

A technology for drinking water treatment and low residue, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of uncontrollable raw material composition and poor product stability, and achieve easy control of raw material quality, stable product and low effluent turbidity. Effect

Inactive Publication Date: 2012-10-10
广东慧信环保有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the composition of the raw materials cannot be controlled, and there are many factors affecting the effect of the polymerization reaction, resulting in poor product stability.

Method used

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  • Flocculant for low-residue drinking water treatment and preparation method thereof
  • Flocculant for low-residue drinking water treatment and preparation method thereof
  • Flocculant for low-residue drinking water treatment and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A flocculant for low-residue drinking water treatment is polymerized from water glass, magnesium chloride, aluminum sulfate, and sodium aluminate. The preparation method comprises the following steps:

[0028] 1) Dissolve the raw materials in water respectively to form SiO 2 Content is 8wt% water glass solution, MgO content is 10wt% magnesium chloride solution, Al 2 o 3 Aluminum sulfate solution with a content of 9 wt%, Al 2 o 3 Content is the sodium aluminate solution of 6.2 wt %;

[0029] 2) At room temperature, in a reaction kettle with a heating and stirring device, add 33.8g water glass solution, 6.0g magnesium chloride solution, wherein, SiO 2 : The mass ratio of MgO is 4.5:1, stir evenly, adjust the pH value to 9.5, and obtain a suspension containing white suspended matter;

[0030] 3) Add 285.6g of aluminum sulfate solution to the suspension, and then add 174.6g of sodium aluminate solution at a stirring speed of 7500rpm to obtain a mixed solution;

[0031...

Embodiment 2

[0035] A flocculant for low-residue drinking water treatment is polymerized from water glass, magnesium chloride, aluminum sulfate, and sodium aluminate. The preparation method comprises the following steps:

[0036] 1) Dissolve the raw materials in water respectively to form SiO 2 Content is 8wt% water glass solution, MgO content is 10wt% magnesium chloride solution, Al 2 o 3 Aluminum sulfate solution with a content of 9 wt%, Al 2 o 3 Content is the sodium aluminate solution of 8.5 wt %;

[0037] 2) At room temperature, in a reaction kettle with a heating and stirring device, add 37.5g of water glass solution, 6.5g of magnesium chloride solution, wherein, SiO 2 : The mass ratio of MgO is 4.6:1, stir evenly, adjust the pH value to 10, and obtain a suspension containing white suspended matter;

[0038] 3) Add 326.7g of aluminum sulfate solution to the suspension, and then add 129.3g of sodium aluminate solution at a stirring speed of 7000rpm to obtain a mixed solution;

...

Embodiment 3

[0043] A flocculant for low-residue drinking water treatment is polymerized from water glass, magnesium sulfate, aluminum chloride, and sodium aluminate. The preparation method comprises the following steps:

[0044] 1) Dissolve the raw materials in water respectively to form SiO 2 Content is 8wt% water glass solution, MgO content is 10wt% magnesium sulfate solution, Al 2 o 3 Aluminum chloride solution with a content of 9 wt%, Al 2 o 3 Content is the sodium aluminate solution of 13.8wt%;

[0045]2) At room temperature, in a reaction kettle with a heating and stirring device, add 40.6g of water glass solution, 7.5g of magnesium sulfate solution, wherein, SiO 2 : The mass ratio of MgO is 4.3:1, stir evenly, adjust the pH value to 9.5, and obtain a suspension containing white suspended matter;

[0046] 3) Add 372.2g of aluminum chloride solution to the suspension, and then add 79.7g of sodium aluminate solution at a stirring speed of 8500rpm to obtain a mixed solution;

[0...

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Abstract

The invention discloses a flocculant for low-residue drinking water treatment and a preparation method thereof. The flocculant is formed by polymerizing sodium silicate, magnesium chloride or magnesium sulfate, aluminum sulfate or aluminum chloride and sodium aluminate, and a liquid product of the flocculant contains 7.3-9.2 weight percent of Al2O3, 0.54-.068 weight percent of SiO2 and 0.12-0.15 weight percent of MgO. The flocculant and the preparation method thereof have the beneficial effects that the flocculant is green and safe, the content of residual aluminum in flocculated effluent water is low, the residual aluminum quantity is remarkably lower than that of a traditional flocculant, and treated water achieves the relevant national urban water supply water quality aluminum content standard requirements. The flocculant has the advantages of small dosage, low effluent turbidity and stable product.

Description

technical field [0001] The invention relates to a low-residue drinking water treatment flocculant and a preparation method thereof. Background technique [0002] At present, people have realized that: excessive intake of aluminum can interfere with the memory function of the human brain and cause senile dementia; when excessive aluminum accumulates in the bones, it will cause osteomalacia; excessive aluminum can also cause digestive system dysfunction , hinder the normal calcium and phosphorus metabolism, inhibit the antioxidant system in the body, and cause a variety of diseases. For this reason, countries all over the world have put forward more and more strict requirements on the aluminum content in drinking water. However, aluminum salt flocculants are commonly used in waterworks in my country. The residual amount of aluminum in drinking water is generally greater than the standard 0.2mg / L formulated by our country, which poses a potential threat to the health of reside...

Claims

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Application Information

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IPC IPC(8): C02F1/52
Inventor 董永星张立武谭铭卓蒋志飞
Owner 广东慧信环保有限公司
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