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Slow release composite flocculant

A composite flocculant and flocculant technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of unstable effluent indicators, secondary pollution, waste of chemicals, etc., to improve the dosing method, ensure continuity, improve efficacy effect

Inactive Publication Date: 2008-12-24
郭振岳 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the main problems in the method of adding several flocculant combinations are that the performance of the flocculant is not fully exerted, and the dosage is large, resulting in waste of chemicals, increased operating costs, secondary pollution, and unstable effluent indicators.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The chemical reagent coating method is used to coat cationic polyacrylamide with starch, so that the flocculant particles are a mixture of cationic polyacrylamide coated with starch, aluminum sulfate and iron sulfate, in terms of weight percentage: aluminum sulfate 60%, 25% of iron sulfate, 10% of cationic polyacrylamide, and 5% of starch are used to prepare slow-release composite coagulant. The shape of the flocculant particles is spherical or nearly spherical, and the particle diameter is 0.1-3mm. Put the obtained slow-release composite coagulant into the sewage at a ratio of 10mg / L. Since polyacrylamide is difficult to dissolve in water, the effect of the entire slow-release composite coagulant in sewage is prolonged, the drug effect is longer, and the sewage treatment is enhanced. ability.

[0020] According to the condition of the raw water in the water treatment plant, a powder dosing device is used, and the dosage is controlled at 0.1-15mg / L. Its treatment effec...

Embodiment 2

[0022] Using the chemical reagent coating method, the non-ionic polyacrylamide is coated with silica gel, so that the flocculant particles are a mixture of non-ionic polyacrylamide, aluminum sulfate and polyferric sulfate coated with silica gel, in weight percentage: of which aluminum sulfate 60%, polyferric sulfate 30%, non-ionic polyacrylamide 5%, water-soluble cellulose 5%, so as to prepare slow-release composite coagulant, the shape of the flocculant particles is spherical or approximately 0.1-3mm.

[0023] According to the condition of the raw water in the water treatment plant, a powder dosing device is used, and the dosage is controlled at 0.1-15mg / L. Its treatment effect can be evaluated according to the routine chemical analysis data of the factory water.

Embodiment 3

[0025] Using the chemical reagent coating method, the non-ionic polyacrylamide is coated with bone glue, so that the flocculant particles are a mixture of non-ionic polyacrylamide, polyaluminum sulfate and ferrous sulfate coated with bone glue, by weight percentage: of which 55% of polyaluminum sulfate, 30% of ferrous sulfate, 10% of non-ionic polyacrylamide, and 5% of bone glue, so as to prepare a slow-release composite coagulant. The shape of the flocculant particles is spherical or approximately spherical. 0.1-3mm.

[0026] According to the condition of the raw water in the water treatment plant, a powder dosing device is used, and the dosage is controlled at 0.1-15mg / L. Its treatment effect can be evaluated according to the routine chemical analysis data of the factory water.

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Abstract

The invention relates to a granular sustained release composite flocculant comprising a polyarylamide coated by a soluble coating material, the residual are aluminum salt and ferric salt. The components according to the weight percentage are as follows: aluminum salt 40%-60%, ferric salt 15%-30%, polyacrylamide 0.1%-10% and soluble coating material 1%-5%. The flocculant of the invention integrates the characteristic of both inorganic and organic flocculants, improves the dosing mode of the medicament, increases the action efficiency of each flocculant by using the process of multistep dissolution sustained release and improves the efficiency of the medicament.

Description

technical field [0001] The invention relates to a water treatment flocculant, in particular to a slow-release composite flocculant. Background technique [0002] Coagulation and sedimentation of chemical agents is a commonly used method in water treatment technology. The method has the characteristics of low investment, small land occupation, low operating cost and wide adaptability. In the coagulation and sedimentation technology of water treatment, the delivery method of chemical agents is one of the key technologies. With the improvement of water treatment requirements, a combination of various flocculants is often used to meet the water quality requirements. At present, the main problems in the method of adding several flocculant combinations are that the performance of the flocculant is not fully exerted, the dosage is large, resulting in waste of chemicals, increased operating costs, secondary pollution, and unstable effluent indicators. Contents of the invention ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52
Inventor 刘希邈徐立群
Owner 郭振岳
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