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Method for synthesizing sludge dewatering agent of positive ions

A technology of sludge dehydrating agent and synthesis method, which is applied in the direction of dehydration/drying/concentrated sludge treatment, etc., to achieve the effects of reducing production costs, no secondary pollution, and less reaction components

Inactive Publication Date: 2007-10-10
广东慧信环保有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to provide a kind of synthetic method of cationic sludge dewatering agent for the weak point of existing synthetic method of cationic sludge dewatering agent, and this method has synthetic time short, labor-saving and time-saving, production cost is low; Operation Simple, mild reaction conditions, easy to control, safe production; convenient for industrial production and popularization and application, etc.

Method used

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  • Method for synthesizing sludge dewatering agent of positive ions

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Comparison scheme
Effect test

Embodiment 1

[0030] The concrete steps of a kind of synthetic method of cationic sludge dewatering agent are as follows:

[0031] (1) Dosing in sequence and stirring evenly

[0032] Under normal pressure, in a device equipped with stirring equipment and constant temperature equipment and at least three feeding ports, the following operations are performed in sequence:

[0033] ①Under the conditions of a constant temperature water bath with an initiation temperature of 25°C, first add deionized water, monomer acrylamide (AM), and acryloyloxyethyltrimethylammonium chloride (DAC) aqueous solution, and stir evenly to prepare the total The mass concentration of the monomer (referring to the percentage of the monomer mass in the total mass of the system) is 35% monomer aqueous solution. The molar ratio of the two monomers acrylamide and acryloyloxyethyltrimethylammonium chloride is 4:1.

[0034] ② After step (1)-① is completed, add buffer solution to the monomer aqueous solution prepared in st...

Embodiment 2

[0044] The concrete steps of a kind of synthetic method of cationic sludge dewatering agent are as follows:

[0045] (1) Dosing in sequence and stirring evenly

[0046] Under normal pressure, in a device equipped with stirring equipment and constant temperature equipment and at least three feeding ports, the following operations are performed in sequence:

[0047] ①Under the conditions of a constant temperature water bath with an initiation temperature of 35°C, first add deionized water, monomer acrylamide (AM), and acryloyloxyethyltrimethylammonium chloride (DAC) aqueous solution, and stir evenly to prepare the total The mass concentration of the monomer (referring to the percentage of the monomer mass in the total system mass) is 20% monomer aqueous solution. The molar ratio of the two monomers acrylamide and acryloyloxyethyltrimethylammonium chloride is 2:1.

[0048] ② After step (1)-① is completed, add buffer solution to the monomer aqueous solution prepared in step (1)-...

Embodiment 3

[0058] The concrete steps of a kind of synthetic method of cationic sludge dewatering agent are as follows:

[0059] (1) Dosing in sequence and stirring evenly

[0060] Under normal pressure, in a device equipped with stirring equipment and constant temperature equipment and at least three feeding ports, the following operations are performed in sequence:

[0061] ①Under the conditions of a constant temperature water bath with an initiation temperature of 40°C, first add deionized water, monomer acrylamide (AM), and acryloyloxyethyltrimethylammonium chloride (DAC) aqueous solution, and stir evenly to prepare the total The mass concentration of the monomer (referring to the percentage of the monomer mass in the total system mass) is 10% monomer aqueous solution. The molar ratio of the two monomers acrylamide and acryloyloxyethyltrimethylammonium chloride is 7:1.

[0062] ② After step (1)-① is completed, add buffer solution to the monomer aqueous solution prepared in step (1)-...

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Abstract

This invention relates to a method for synthesizing cationic sludge dehydrator. The method comprises: adjusting the pH value of the aqueous solution of acrylamide ad acryloylethoxyl trimethyl ammonium chloride with a buffer, and initiating the polymerization reaction with a redox composite initiator. The obtained cationic sludge dehydrator has a molecular weight of 3000000-4000000, and a cation concentration of 10-30%. The method has such advantages as simple process, easy operation, mild reaction conditions, safe production, and no secondary pollution. The cationic sludge dehydrator has good dehydrating effect, and is suitable for treating wastewater and sludge from chemical and petroleum industries, especially sludge from urban sewage treatment plants.

Description

1. Technical field [0001] The invention belongs to the technical field of synthesis of sludge dewatering agents, in particular to a synthesis method of cationic sludge dewatering agents. 2. Background technology [0002] In recent years, with the development of my country's social economy and urbanization, the generation and quantity of urban sewage have been increasing, and in the process of urban sewage treatment, a large amount of sludge will be produced, which accounts for about 0.3% of the treated water. 0.5% (volume), sludge usually contains a large amount of toxic and harmful substances (such as organic debris, parasite eggs, bacteria, inorganic particles, heavy metals, etc.), plant nutrients (such as nitrogen, phosphorus, potassium), organic matter and water. Sludge particles are fine, flocculent and colloidal in structure, small in specific gravity, not easy to sink and compact, high in water content and not easy to dehydrate; poor in stability, easy to rot and smell...

Claims

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Application Information

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IPC IPC(8): C02F11/14C08F220/56C08F4/40C08J3/12
Inventor 郑怀礼刘宏谭铭卓蔚阳杨铀
Owner 广东慧信环保有限公司
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