Mixed flocculating agent for sludge treatment and preparation method thereof

A sludge treatment and flocculant technology, applied in sludge treatment, water/sludge/sewage treatment, dehydration/drying/thickened sludge treatment, etc. Advanced problems, to achieve the effect of reducing volume, good physical adsorption capacity, and reducing water content

Inactive Publication Date: 2019-04-05
ANHUI ZHONGHUAN ENVIRONMENTAL PROTECTION TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The currently used flocculants include natural flocculants and polymeric flocculants. Whether it is a natural flocculant or a polymeric flocculant, the flocculation time is longer, the turbidity is higher, and the moisture content of the sludge after flocculation is higher.

Method used

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  • Mixed flocculating agent for sludge treatment and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0018] A mixed flocculant for sludge treatment, comprising the following components in parts by weight, 4 parts of polydimethyldiallylammonium chloride, 1 part of polyaluminum chloride, 2 parts of polyacrylamide, 2 parts of ascorbic acid 2 parts, 2 parts of caffeic acid, 2 parts of grape polyphenols, 20 parts of fly ash and 20 parts of clay.

[0019] A method for preparing a mixed flocculant for sludge treatment. Add 0.2 g of ascorbic acid and 0.4 g of polydimethyldiallyl ammonium chloride to 100 mL of water in sequence, stir evenly and heat to 40°C, then cool to 20°C After obtaining solution A, add 0.1g of polyaluminium chloride, 0.2g of polyacrylamide, 0.2g of caffeic acid, 0.2g of polyphenols, 2g of fly ash and 2g of clay into solution A in turn, stir evenly for 20min, Drying at the bottom to obtain the mixed flocculant.

Embodiment 2

[0021] A mixed flocculant for sludge treatment, comprising the following components in parts by weight, 2 parts of polydimethyldiallylammonium chloride, 1 part of polyaluminum chloride, 1 part of polyacrylamide, 2 parts of ascorbic acid 1 part of caffeic acid, 1 part of grape polyphenols, 20 parts of fly ash and 40 parts of clay.

[0022] A method for preparing a mixed flocculant for sludge treatment. Add 0.2 g of ascorbic acid and 0.1 g of polydimethyldiallyl ammonium chloride to 100 mL of water in sequence, stir evenly and heat to 40°C, then cool to 30°C After obtaining solution A, add 0.1g of polyaluminium chloride, 0.1g of polyacrylamide, 0.1g of caffeic acid, 0.1g of polyphenols, 2g of fly ash and 4g of clay into solution A in sequence, stir evenly for 20min, and heat at 100℃ Drying at the bottom to obtain the mixed flocculant.

Embodiment 3

[0024] A mixed flocculant for sludge treatment, comprising the following components in parts by weight, 2 parts of polydimethyldiallylammonium chloride, 1 part of polyaluminum chloride, 2 parts of polyacrylamide, 2 parts of ascorbic acid 1 part of caffeic acid, 2 parts of grape polyphenols, 10 parts of fly ash and 40 parts of clay.

[0025] A method for preparing a mixed flocculant for sludge treatment. Add 0.2 g of ascorbic acid and 0.2 g of polydimethyldiallyl ammonium chloride to 100 mL of water in sequence, stir evenly and heat to 40°C, then cool to 30°C After obtaining solution A, add 0.1g of polyaluminium chloride, 0.2g of polyacrylamide, 0.1g of caffeic acid, 0.2g of polyphenols, 1g of fly ash and 4g of clay into solution A in sequence, stir evenly for 20min, and heat at 100℃ Drying at the bottom to obtain the mixed flocculant.

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Abstract

The invention belongs to a technical field, and particularly relates to a mixed flocculating agent for sludge treatment. The mixed flocculating agent is prepared from the following components in partsby weight: 2 to 4 parts of polydimethyl diallyl ammonium chloride, 1 to 2 parts of polyaluminum chloride, 1 to 2 parts of polyacrylamide, 1 to 2 parts of ascorbic acid, 1 to 2 parts of caffeic acid,1 to 3 parts of grape polyphenol, 10 to 20 parts of pulverized fuel ash and 10 to 40 parts of clay. The mixed flocculating agent has the beneficial effects that, when the sewage treatment is carried out by using the mixed flocculating agent prepared by the preparation method, the water content of sludge finished in flocculation is as low as 65.3%; the size of the sludge is greatly decreased; and the treatment cost of a subsequent working procedure is decreased.

Description

technical field [0001] The invention belongs to the technical field, and in particular relates to a mixed flocculant for sludge treatment and a preparation method thereof. Background technique [0002] Flocculation and sedimentation can effectively remove heavy metal ions, suspended solids, organic matter and ammonia nitrogen in water, and further purify water quality, and have been widely used in water treatment processes. At present, the discharge scale of urban sewage and waste water is increasing continuously, and the types are increasing continuously. The composition of pollutants in water is becoming more and more complex, and the harm to the environment is becoming more and more serious. Therefore, the difficulty of water treatment is further increased. Traditional flocculants can no longer meet the needs of existing flocculation technology. In addition, a large amount of excess sludge will be produced in the process of urban sewage treatment, and the moisture conte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/148C02F1/56C02F1/54C02F1/52
CPCC02F1/5236C02F1/5245C02F1/54C02F1/56C02F11/14
Inventor 刘俊闫珍刘渐和张华黄健
Owner ANHUI ZHONGHUAN ENVIRONMENTAL PROTECTION TECH CO LTD
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