High-effective composite flocculant for treating low-turbidity water and preparation method of high-effective composite flocculant

A composite flocculant and low turbidity technology, which is applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of harsh reaction conditions, complicated preparation process, and prone to gelation, etc., and achieve stable and easy-to-control reaction conditions, Good response and good stability

Active Publication Date: 2012-06-20

江门市志升环保科技有限公司

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AI-Extracted Technical Summary

Problems solved by technology

However, there are many impurities in the product, the composition and concentration are not easy to control, there are many factors affecting the effect of the polymerization reaction, and the product stability time is short

[0008] CN1042340A discloses that sodium aluminate, sodium silicate and aluminum sulfate are used as ...

Abstract

The invention discloses a high-effective composite flocculant for treating low-turbidity water and a preparation method of the high-effective composite flocculant. The raw materials of the high-effective composite flocculant comprise sodium aluminate, a sodium silicate solution, an aluminum sulfate solution and the like. The preparation method comprises three steps including preparation of a stable sodium aluminate solution, preparation of a polysilicate solution with a low polymerization degree and a polymeric reaction. According to the preparation method disclosed by the invention, when silicic acid is activated, due to the combination of weak acid with strong acid ammonium salt, the polymerization speed of self polymerization of the silictic acid is effectively controlled and stable polysilicate with the low polymerization degree is prepared; and in the subsequent polymeric reaction, the bonding of aluminum with silicon is facilitated, the effective smooth operation of the polymeric reaction is ensured and the obtained inorganic polymer composite flocculant is favorable in stability and low in consumption; and flocculating constituent particles are quick in settling and favorable in reaction effect.

Application Domain

Water/sewage treatment by flocculation/precipitation

Technology Topic

Sodium silicateAluminium salts +8

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Examples

Experimental program(6)
Effect test(1)

Example Embodiment

[0028] Example 1

[0029] A high-efficiency composite flocculant for treating low-turbidity water. Its raw materials contain the following components by weight: 6.8 parts of sodium aluminate, 6.5 parts of water glass solution, 69.5 parts of aluminum sulfate solution, and 17.2 parts of water. Its preparation method It includes the following steps:

[0030] 1) Preparation of sodium aluminate stable solution: Dissolve 36.4g sodium aluminate and 0.44g sodium tartrate in 91g water, heat to boil, when the mixed solution becomes clear, cool to room temperature to obtain sodium aluminate stable solution A;

[0031] 2) Preparation of activated silicic acid with low degree of polymerization: take 34.5g of water glass solution, adjust the pH to 1 with a mixture of oxalic acid and ammonium sulfate with a molar ratio of 1:2, and let it stand to obtain a transparent solution with a slight blue fluorescence B;

[0032] 3) Polymerization reaction: Add solution B to 370g aluminum sulfate solution at room temperature, stir evenly, slowly add solution A, stir to obtain a mixed solution, then heat the mixed solution in a water bath while stirring, and slowly increase the temperature to 50 ℃, heat preservation, maturation, and cooling to obtain product 1.

Example Embodiment

[0033] Example 2

[0034] A high-efficiency composite flocculant for treating low-turbidity water. Its raw materials contain the following components by weight: 8.4 parts of sodium aluminate, 6.8 parts of water glass solution, 63.6 parts of aluminum sulfate solution, 21.2 parts of water, and its preparation method It includes the following steps:

[0035] 1) Preparation of sodium aluminate stable solution: Dissolve 42.5g sodium aluminate and 0.59g sodium gluconate in 106g water, heat to boil, when the mixture becomes clear, cool to room temperature to obtain sodium aluminate stable solution A;

[0036] 2) Preparation of activated silicic acid with low degree of polymerization: take 34.5g of water glass solution, adjust the pH to 2 with a mixture of citric acid and ammonium sulfate with a molar ratio of 1:1, and let it stand to obtain a slightly blue fluorescent transparent Solution B;

[0037] 3) Polymerization reaction: At room temperature, add solution B to 321g aluminum sulfate solution, stir evenly, slowly add solution A, stir to obtain a mixed solution, then heat the mixed solution in a water bath while stirring, so that the temperature slowly rises to 60 ℃, heat preservation and maturation, and cooling to obtain product 2.

Example Embodiment

[0038] Example 3

[0039] A high-efficiency composite flocculant for treating low-turbidity water. Its raw materials contain the following components by weight: 8.6 parts of sodium aluminate, 5.1 parts of water glass solution, 64 parts of aluminum sulfate solution, 22.3 parts of water, and its preparation method It includes the following steps:

[0040] 1) Preparation of sodium aluminate stable solution: Dissolve 42.7g sodium aluminate and 1.45g potassium tartrate in 110g water, heat to boil, when the mixture becomes clear, cool to room temperature to obtain sodium aluminate stable solution A;

[0041] 2) Preparation of activated silicic acid with low degree of polymerization: take 25.5g of water glass solution, adjust pH=1.5 with a mixture of oxalic acid, acetic acid, and ammonium sulfate with a molar ratio of 1:1:5, and leave it to stand still to give it a bluish color Fluorescent transparent solution B;

[0042] 3) Polymerization reaction: At room temperature, add solution B to 319g aluminum sulfate solution, stir evenly, slowly add solution A, stir to obtain a mixed solution, then heat the mixed solution in a water bath while stirring, and make the temperature rise slowly to 70 ℃, heat preservation, maturation, and cooling to obtain product 3.

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Classification and recommendation of technical efficacy words

good stability
reduce dosage

High-effective composite flocculant for treating low-turbidity water and preparation method of high-effective composite flocculant

AI-Extracted Technical Summary

Problems solved by technology

Abstract

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Examples

Example Embodiment

Example Embodiment

Example Embodiment

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Description & Claims & Application Information

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