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Method for preparing adsorption-coagulation-type polysilicate flocculating agent

A polysilicate and flocculant technology, applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, silicon compounds, etc., can solve the problems of uneven settling speed, affecting the quality of effluent, and difficulty in settling of alum flowers. To achieve the effect of facilitating settlement, avoiding long settlement time, and promoting growth and increase

Inactive Publication Date: 2010-05-26
南通立源水业科技发展有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the main problems of flocculants are: large dosage, resulting in a large amount of waste of chemicals, uneven formation of alum flowers, resulting in many small alum flowers difficult to settle, affecting the quality of effluent water, uneven settling speed, and affecting treatment efficiency

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] At first the sodium silicate solution of 4 weight parts is added into the water of 55 weight parts to make sodium silicate solution; Next under the condition of stirring, described sodium silicate solution is added to the concentrated sulfuric acid of the mass concentration 98% of 18 weight parts or In the concentrated hydrochloric acid of mass concentration 37%, obtain the polymeric silicic acid solution that pH value is 3.5-6.5; Then in the described polymeric silicic acid solution, add the aluminum sulfate of 12 weight parts and the active carbon particle of 0.6 weight part together, the active carbon particle The diameter is 5um. Finally, after stirring and static aging, the adsorption-assisted coagulation polysilicate flocculant can be obtained.

Embodiment 2

[0021] First, the sodium silicate solution of 6 parts by weight is added to the water of 60 parts by weight to make a sodium silicate solution; secondly, the sodium silicate solution is added to 21 parts by weight of concentrated sulfuric acid with a mass concentration of 98% or In the concentrated hydrochloric acid of mass concentration 37%, obtain the polysilicic acid solution that pH value is 3.5-6.5; Then in the described polysilicic acid solution, add the aluminum sulfate of 15 weight parts and the active carbon particle of 1 weight part together, the active carbon particle The diameter is 1mm. After stirring and static aging, the adsorption-assisted coagulation polysilicate flocculant can be obtained.

Embodiment 3

[0023] At first the sodium silicate solution of 8 weight parts is added into the water of 65 weight parts to make sodium silicate solution; Next under the condition of stirring, described sodium silicate solution is added to the concentrated sulfuric acid of the mass concentration 98% of 24 weight parts or In the concentrated hydrochloric acid of mass concentration 37%, obtain the polymeric silicic acid solution that pH value is 6.5; Then in the described polymeric silicic acid solution, add the aluminum sulfate of 18 weight parts and the active carbon particle of 1.5 weight part together, the diameter of active carbon particle is 3mm, and finally after stirring and static aging, the adsorption-assisted coagulation polysilicate flocculant can be obtained.

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Abstract

The invention discloses a method for preparing an adsorption-coagulation-type polysilicate flocculating agent, which is characterized by comprising the following steps: firstly, adding 4 to 8 weight parts of sodium silicate to 55 to 65 weight parts of water to prepare solution of sodium silicate; secondly, adding the solution of the sodium silicate to 18 to 24 weight parts of 98 percent sulfuric acid or 37 percent hydrochloric acid with stirring to obtain the solution of polysilicic acid with a pH value of 3.5 to 6.5; thirdly, adding 12 to 18 weight parts of inorganic salt and 0.6 to 1.5 weight parts of active carbon to the solution of polysilicic acid at the same time to obtain a mixture; and finally, stirring, standing and curing the mixture to obtain the adsorption-coagulation-type polysilicate flocculating agent. The adsorption-coagulation-type polysilicate flocculating agent prepared by the invention has the advantages of wide application range, mild use condition, quick response speed, thorough removal effect, strong adsorption capacity, large and close-grained formed alumen ustum, good sedimentation effect, low dosage, obvious volume sweeping effect, remarkable decolouring effect, low cost and the like.

Description

technical field [0001] The invention relates to a preparation method of a polysilicate flocculant, in particular to a preparation method of a polysilicate flocculant rich in active catalyst. Background technique [0002] Chemical flocculation and sedimentation is a commonly used method in water treatment technology. At present, the main problems of the flocculant are: the dosage is large, resulting in a large amount of waste of chemicals, and the formation of alum flowers is uneven, which makes it difficult for many small alum flowers to settle, which affects the water quality of the effluent, and the sedimentation speed is not uniform, which affects the treatment efficiency. Contents of the invention [0003] The purpose of the present invention is to provide a new preparation method to prepare a high-efficiency flocculant with adsorption and coagulation-assisting functions to make up for the above-mentioned deficiencies. [0004] Technical scheme of the present inventio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/20C02F1/52
Inventor 刘希邈李昌科张丽范志伟
Owner 南通立源水业科技发展有限公司
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