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Sewage flocculating agent preparation method

A flocculant and sewage technology, which is applied in the field of sewage flocculant preparation, can solve the problems of irritating degradation of the human body, large residual amount in water, and inability to adapt, and achieve excellent flocculation effect, low ecotoxicity, and wide application range.

Inactive Publication Date: 2012-08-22
廊坊赛瑞贝达科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These two types of flocculants are generally effective in application, especially in sewage or more complex sewage, and cannot adapt to the development of modern industry and cities; and they are irritating to the human body and have poor degradability and large residuals in water, which can cause Secondary pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: The preparation method of this sewage flocculant adopts the following process steps.

[0022] Add 200g of deionized water and 4.39mol of epichlorohydrin into the reactor, replace it with nitrogen until the oxygen content is less than 100ppm, turn on the stirring, lower the temperature to 10°C, and start adding a 40wt% aqueous solution of dimethylamine (4.39mol) dropwise; After the methylamine is dropped, the temperature is raised to 80°C, and the temperature is maintained for 10 hours. The pH value is monitored by sampling until pH = 6.5, and the temperature is lowered to 60°C. Add 0.5% sodium sulfite in the mass of the reaction solution, stir for 2 hours, and then adjust the pH with sodium hydroxide to Neutral, finished product.

Embodiment 2

[0023] Embodiment 2: The preparation method of this sewage flocculant adopts the following process steps.

[0024] Add 400g deionized water and 4.4mol epichlorohydrin into the reactor, replace it with nitrogen until the oxygen content is less than 100ppm, turn on the stirring, lower the temperature to 30°C, and start adding diethylamine (4.38mol) dropwise; Then raise the temperature to 70°C, keep the temperature constant for 10 hours, take samples to monitor the pH value, until pH = 6.0; cool down to 30°C, add sodium thiosulfate with 1.0% of the mass of the reaction solution, stir for 1 hour, and then adjust the pH to neutral with potassium hydroxide Sex, a vested product.

Embodiment 3

[0025] Embodiment 3: The preparation method of this sewage flocculant adopts the following process steps.

[0026] Add 200g of deionized water and 4.38mol of 1-bromo-2,3-epoxypropylene into the reactor, replace it with carbon dioxide until the oxygen content is less than 100ppm, turn on the stirring, lower the temperature to 50°C, and start adding dimethylamine (4.4mol) dropwise Aqueous solution; heat up to 90°C after dripping dimethylamine, keep the temperature for 10 hours, take samples to monitor the pH value until pH = 7.0; cool down to 0°C, add hydrogen peroxide with 0.1% reaction liquid quality, stir for 3 hours, and then use sodium hydroxide Adjust the pH to neutral to obtain the finished product.

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Abstract

The invention discloses a sewage flocculating agent preparation method. The method includes: adding 2-straightchain alkylamine into mixed liquid of 1-halogen-2,3-epoxypropane with water under the inert gas shielding and under the temperature of T1=0-50 DEG C; heating to the temperature of T2=70-100 DEG C for reaction until pH (potential of hydrogen) of the reaction liquid is equal to or smaller than 7.0; cooling the reaction liquid, adding post-treating agent for treatment, and adjusting the reaction liquid to be neutral to obtain the flocculating agent. The method has the advantages of environment friendliness and simple process due to avoidance of high pressure, high temperature, waste gas, waste water and industrial residue. The flocculating agent obtained by the method has excellent degradability, low ecotoxicity and no stimulation to human body, has evident excellent flocculating effect on treatment of various complex wastewaters, embodies high cost performance in sludge dewatering, and has the advantages of harmlessness to human bodies, remnant avoidance, effectiveness in flocculating and wide application range.

Description

technical field [0001] The invention relates to a preparation method of a water treatment agent, in particular to a preparation method of a sewage flocculant. Background technique [0002] At present, the problem of water pollution in the world is becoming more and more serious, and the problem of water treatment is also becoming more and more serious. In order to solve the problem of water pollution, the flocculant precipitation method has been widely used as a low-cost water treatment method. Flocculation is an important process in the safe purification of water supply and wastewater treatment, and the flocculant directly affects the flocculation effect. Flocculants are mainly used in the field of sewage treatment, which can reduce the sensory indicators such as turbidity and chromaticity of raw water, and remove various high-molecular organic substances, heavy metals and radioactive substances. Flocculation can be an independent treatment system, or combined with other ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/54C02F1/56
Inventor 贯硕磉杜宝燕陈芳
Owner 廊坊赛瑞贝达科技有限公司
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