Preparation method of efficient coagulant

A coagulant and high-efficiency technology, applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, water pollutants, etc., can solve the problem of unfavorable floc and liquid gravity separation, increase operation complexity, and affect coagulation effect To achieve good coagulation removal effect, highlight environmental and economic benefits, and improve coagulation effect

Pending Publication Date: 2021-12-28
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When in use, agent A and agent B need to be dosed separately, which increases the complexity of the operation
In addition, a common problem in the use of organic coagulants is that the flocs formed by organic coagulants are slow and in a state of neither completely sinking nor completely floating, which is not conducive to the gravitational separation of flocs and liquids, which will seriously Affect the coagulation effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] In this example, coagulant A and coagulant B were prepared respectively in order to compare the effects of sedimentation aids. The object of coagulation treatment is coking wastewater.

[0025] The preparation method of coagulant comprises the steps:

[0026] 1) Preparation of coagulant main agent: Add 20ml dimethyl diallyl ammonium chloride, 12.6g acrylamide, 63.8ml pure water in sequence in the reaction kettle, add 0.003g EDTA-2Na, 0.006g iso Propanol, 0.001g urea, nitrogen gas at 35°C for 30min, add 0.012g ammonium persulfate to react for 10min, then add 0.003g sodium bisulfite, continue to react at 35°C for 1.5h; adjust the temperature to 60°C, add 0.5g chitosan continued to react for 1.5h to obtain the coagulant main agent;

[0027] 2) Preparation of a sedimentation aid: modified diatomite is used as a sedimentation aid. Modified diatomite is natural diatomite which is mechanically pulverized and treated at a microwave power of 320W for 10 minutes, and then siev...

Embodiment 2

[0035] The coagulant preparation step of the present embodiment is basically the same as the preparation step of the coagulant A in embodiment one, and the special features are:

[0036] 1) Preparation of coagulant main agent: add 16.5ml dimethyl diallyl ammonium chloride, 10.1g acrylamide, 73.4ml pure water to the reaction kettle in turn, add 0.003g EDTA-2Na, 0.006g respectively after dissolving Isopropanol, 0.001g urea, nitrogen flow at 35°C for 35min, add 0.012g ammonium persulfate to react for 10min, then add 0.003g sodium bisulfite, continue to react at 35°C for 1.5h; adjust the temperature to 60°C, Add 0.2g chitosan and continue to react for 1.5h to obtain the coagulant main agent;

[0037] 2) Preparation of a sedimentation aid: modified diatomite is used as a sedimentation aid. Modified diatomite is natural diatomite which is mechanically pulverized and treated at a microwave power of 320W for 10 minutes, and then sieved to obtain particles with a particle size of less...

Embodiment 3

[0042] The coagulant preparation step of the present embodiment is basically the same as the preparation step of the coagulant A in embodiment one, and the special features are:

[0043] 1) Prepare the main coagulant: add 18.5ml dimethyl diallyl ammonium chloride, 11.2g acrylamide, 70.3ml pure water to the reaction kettle in sequence, add 0.003g EDTA-2Na, 0.005g respectively after dissolving Isopropanol, 0.001g urea, nitrogen flow at 35°C for 30-40min, add 0.012g ammonium persulfate to react for 10min, then add 0.003g sodium bisulfite, continue to react at 35°C for 1.5h; adjust the temperature to 60 ℃, add 0.1g chitosan and continue to react for 1.5h to obtain the coagulant main agent;

[0044] 2) Preparation of a sedimentation aid: modified diatomite is used as a sedimentation aid. Modified diatomite is natural diatomite that is mechanically pulverized, treated at a microwave power of 320W for 10 minutes, and then sieved to obtain particles with a particle size of less than ...

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Abstract

The invention discloses a preparation method of an efficient coagulant. The efficient coagulant comprises the following components in percentage by weight: 20-40% of a coagulant main agent, 20-60% of deionized water, 20-40% of a settling agent and 1-8% of an emulsion stabilizer. According to the preparation method, the coagulation effect and the eurytopic applicability can be improved; by adding the emulsion stabilizer, the settling agent can be uniformly mixed with the coagulant main agent, so that the coagulation speed is accelerated; the preparation method is simple and convenient to use; and when the efficient coagulant is used for treating degradation-resistant high-concentration organic wastewater, generated flocs are large, the settling speed is high, and the treatment effect is good.

Description

technical field [0001] The invention relates to the technical field of high-efficiency coagulant preparation, in particular to a preparation method of high-efficiency coagulant. Background technique [0002] Coagulation treatment is a common method of water treatment, which can remove colloidal substances and organic matter in water through coagulation treatment. Coagulants used in water treatment are often divided into inorganic coagulants and organic coagulants. Compared with inorganic coagulants, organic coagulants have the advantages of less dosage, wide range of water quality and fast flocculation speed, so they have been more and more widely used in our country. [0003] Organic coagulants refer to natural or synthetic organic molecular substances that can produce flocculation. Natural products are proteins or polysaccharides, such as chitosan extracted from the shells of marine arthropods such as shrimps and crabs, the shells of insects, the shells and bones of moll...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/54C02F1/56C02F1/52C02F101/30
CPCC02F1/54C02F1/56C02F1/5236C02F2101/30
Inventor 丁国际周婷魏婉蓉唐量
Owner SHANGHAI UNIV
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