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Ternary compound flocculant and its preparation and application

A flocculant and composite technology, applied in the direction of flocculation/sedimentation water/sewage treatment, dehydration/drying/thickened sludge treatment, etc., can solve the problem that has not been seen yet. Issues such as research and development and application reports of soil-removing ternary composite flocculants, to achieve the effects of small changes in coagulation effects, rapid precipitation, and less coagulation deterioration

Inactive Publication Date: 2011-12-21
兰州大欣水工业有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are no reports on the development and application of polyaluminium-iron / organic polymer cationic flocculants / modified montmorillonite ternary composite flocculants

Method used

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  • Ternary compound flocculant and its preparation and application
  • Ternary compound flocculant and its preparation and application
  • Ternary compound flocculant and its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Preparation steps of ternary composite flocculant:

[0025] 1) Preparation of gel-like aluminum hydroxide: add 85 parts of hydrochloric acid and 100 parts of water to 13 parts of crystalline aluminum hydroxide, dissolve at 85°C and 0.2 MPa, react and polymerize for 10 hours, cool and precipitate to obtain a gel aluminum hydroxide;

[0026] 2) Preparation of organic polymer cationic flocculant and montmorillonite hybrid system: add 8 parts of acidified montmorillonite to 105 parts of liquid cationic polyacrylamide solution, stir and compound at 70°C for 9 hours to form liquid cationic polyacrylamide / montmorillonite composite system solution;

[0027] 3) Preparation of ternary composite flocculant: Add 185 parts of gelatinous aluminum hydroxide, 80 parts of hydrochloric acid, 25 parts of calcium aluminate powder, and 10 parts of ferrous sulfate in the reaction kettle at 80 °C and 0.25 MPa. Two parts of the liquid cationic polyacrylamide / montmorillonite composite system...

Embodiment 2

[0029] 1) Preparation of gel-like aluminum hydroxide: add 80 parts of hydrochloric acid and 90 parts of water to 19 parts of crystalline aluminum hydroxide, dissolve at 110°C and 0.15 MPa, react and polymerize for 12 hours, cool and precipitate to obtain a gel aluminum hydroxide;

[0030] 2) Prepare the hybrid system of organic polymer cationic flocculant and montmorillonite: add 13 parts of acidified montmorillonite to 95 parts of polydimethyldiallylammonium chloride organic flocculant, stir and compound at 90°C for 12 hours , forming polydimethyldiallylammonium chloride / montmorillonite composite system solution;

[0031] 3) Add 145 parts of the obtained semi-finished product-gelatinous aluminum hydroxide, 75 parts of hydrochloric acid, 35 parts of calcium aluminate powder, and 8 parts of ferrous sulfate in the reaction kettle. The methyl diallyl ammonium chloride / montmorillonite composite system was subjected to secondary polymerization, reacted for 11 hours, and aged and d...

Embodiment 3

[0033] Preparation steps of ternary composite flocculant: preparation of gel-like aluminum hydroxide: add 95 parts of hydrochloric acid and 98 parts of water to 15 parts of crystalline aluminum hydroxide, dissolve at 120°C and 0.15MPa, and react and polymerize for 11 hours , cooling, and precipitation to obtain gelatinous aluminum hydroxide.

[0034] 2) Preparation of organic polymer cationic flocculant and montmorillonite hybrid system: add 5 parts The acidified montmorillonite was stirred and compounded at 80°C for 8 hours to form a solution of a composite system of liquid cationic polyacrylamide, polydimethyldiallylammonium chloride and montmorillonite;

[0035] 3) Preparation of ternary composite flocculant: Add 125 parts of gelatinous aluminum hydroxide, 90 parts of hydrochloric acid, 40 parts of calcium aluminate powder, and 13 parts of ferrous sulfate into the reaction kettle at 100 °C and 0.32 MPa. Three parts of liquid cationic polyacrylamide, polydimethyldiallylammo...

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Abstract

The ternary composite flocculant is prepared according to the following parts by weight: 125-185 parts of gel-like aluminum hydroxide, 1-4 parts of organic polymer cationic flocculant and montmorillonite hybrid system, 75-90 parts of hydrochloric acid, 25-40 parts of calcium aluminate powder, 8-13 parts of ferrous sulfate. The preparation method of the hybrid system of gelatinous aluminum hydroxide, organic flocculant and montmorillonite is as follows: 80-95 parts of hydrochloric acid and 90-105 parts of water are added to 13-19 parts of crystalline aluminum hydroxide. Dissolve at 120°C and 0.15-0.3MPa, react and polymerize for 10-15 hours, cool and precipitate to obtain gel-like aluminum hydroxide; add 5-13 parts of acidified montmorillonite to 85-105 parts of organic polymer cationic flocculant , 70-100°C, stirring and compounding for 8-13 hours to obtain an organic polymer cationic flocculant / montmorillonite hybrid system. It is used in the production of domestic wastewater, sludge flocculation treatment and water purification, etc. It has the advantages of fast reaction speed, fast precipitation, good activity, good filterability and low cost.

Description

technical field [0001] The invention relates to a flocculant for drinking water and sewage treatment, in particular to a ternary compound flocculant. The invention also relates to the preparation of the ternary compound flocculant and its application in water purification, waste water and sludge treatment. Background technique [0002] Water treatment flocculants are widely used chemical agents in the field of water treatment. Existing flocculants include inorganic flocculants, organic flocculants and inorganic-organic composite flocculants. Researches by Yang Huisen, Zhang Xinghua, Zhou Liyun, Wang Xuefeng, Ma Fengyun, etc. have shown that ordinary inorganic flocculants have the advantages of high removal rate of wastewater turbidity, SS, COD, metal ions, etc., wide water treatment surface, and low corrosion to equipment pipelines, etc. . However, the use of this inorganic flocculant is large, which increases the cost of the enterprise. Tan Zhengde, Long Youqian, etc. h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52C02F11/14
Inventor 李静敏李彦锋
Owner 兰州大欣水工业有限责任公司