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Fly ash composite flocculating agent and preparation method thereof

A composite flocculant, fly ash technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of large amount of acid and poor soluble COD effect, to increase the porosity and surface area, increase the flocculation effect, High DOD removal effect

Active Publication Date: 2012-05-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of the above method is that the amount of acid is large, and the performance of the treated product needs to be further improved
Organic polymer flocculants are widely used in sewage treatment because of their low dosage and good treatment effect in the water treatment process, but their effect on removing soluble COD in sewage is poor

Method used

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  • Fly ash composite flocculating agent and preparation method thereof
  • Fly ash composite flocculating agent and preparation method thereof
  • Fly ash composite flocculating agent and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Take 100g of fly ash in a 250mL flask, pour 100mL of hydrochloric acid with a concentration of 36%, place it in an ultrasonic generator, and adjust the ultrasonic power: F=20KHz, power density 100w / L, the temperature was controlled at 25°C, and the reaction was stirred for 1.0 hour. Rinse repeatedly with clean water until the pH value of the washing water reaches 5, filter and set aside. Modified fly ash-1 was obtained.

Embodiment 2

[0021] Take 150g of fly ash in a 250mL flask, pour 100mL of hydrochloric acid with a concentration of 30%, place it in an ultrasonic generator, and adjust the ultrasonic frequency: F=25KHz, power density 300w / L, the temperature was controlled at 50°C, and the reaction was stirred for 1.5 hours. Rinse repeatedly with clean water until the pH of the washing water reaches 6.5, filter and set aside. The modified fly ash-2 was obtained.

Embodiment 3

[0023] Take 50g of fly ash in a 250mL flask, pour 100mL of hydrochloric acid with a concentration of 30%, place it in an ultrasonic generator, and adjust the ultrasonic frequency: F=20KHz, power density 800w / L, the temperature is controlled at 60°C, and the reaction is stirred for 0.5 hours. Rinse repeatedly with clean water until the pH value of the washing water reaches 6, filter and set aside. The modified fly ash-3 was obtained.

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Abstract

The invention relates to a fly ash composite flocculating agent and a preparation method thereof. Fly ash composite flocculating agent is a compound product of organic flocculating agent and modified fly ash. A preparation method of the fly ash composite flocculating agent is as below: fly ash is treated with acidity modification in a supersonic wave environment to enhance absorption capability of fly ash; then the fly ash is compound with organic polymeric flocculating agent to form a novel flocculating agent with efficient flocculation effect and high adsorption. The composite flocculating agent of the invention has good compressive treatment effect on sewage in industries of printing and dyeing, papermaking, petroleum, chemistry and light industry, especially on sewage with high chromaand high COD (chemical oxygen demand).

Description

technical field [0001] The invention relates to a fly ash composite flocculant and its preparation method. Specifically, the fly ash produced by a thermal power plant is compounded with an organic polymer flocculant to form a new type of sewage treatment agent, which can effectively treat Sewage produced by various enterprises such as printing and dyeing, papermaking, petroleum, chemical industry, light industry, etc., is especially suitable for treating sewage with high chroma and high COD, so as to realize waste utilization. Background technique [0002] A large amount of flocculant is needed in the water treatment process. By adding flocculant to the sewage, COD, chroma, suspended solids and other pollutants in the sewage can be removed, and the water quality can be purified. The types of flocculants include inorganic flocculants, organic flocculants and composite flocculants. In the process of use, the use of inorganic chemicals is large, resulting in many flocs; the do...

Claims

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Application Information

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IPC IPC(8): C02F1/56
Inventor 杨丽王有华回军赵景霞
Owner CHINA PETROLEUM & CHEM CORP
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