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Process for sorbing material using soot

An adsorption material, coal ash technology, applied in chemical instruments and methods, other chemical processes and other directions, can solve the problems of low coal ash adsorption, large increase in waste water sludge volume, etc., achieve high adsorption efficiency, reduce waste water treatment costs, The effect of high market advantage

Inactive Publication Date: 2008-06-25
谢雅敏 +5
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But on the whole, the adsorption capacity of coal ash is low, which is far lower than that of commercially available adsorption materials for wastewater treatment. It needs to be added in large quantities to meet the pollution discharge standards. Therefore, a large amount of coal ash is reluctantly added to wastewater in order to absorb heavy metals. , it just causes a large increase in the amount of sludge in the wastewater

Method used

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  • Process for sorbing material using soot
  • Process for sorbing material using soot
  • Process for sorbing material using soot

Examples

Experimental program
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Effect test

Embodiment 1

[0027] First, please refer to figure 1 Shown:

[0028] (1) Separation of coal ash components: First, stir and mix coal ash and water (solid-to-liquid ratio = 1g: 20ml), and introduce ultrasonic waves (20KHz) into the mixture to form coal ash components (oxide particles and carbon particles) fully dispersed;

[0029] (2) Carry out carbon concentration treatment: after step (1) ultrasonic treatment, use wet screening again, take out the part of 400 mesh or more, after ultrasonic treatment for 10 minutes, its carbon grade can reach more than 85% (see Table 3), And after 15 minutes, then can obtain the carbon concentrate of carbon grade up to 90.5% (as table 3, can find out the effect of ultrasonic treatment to carbon concentration, preferably time is about 15 minutes, concentrate The carbon grade can be as high as 90.5%).

[0030] Table 3 The effect of ultrasonic treatment on improving the carbon grade of the concentrate

[0031] Ultrasonic treatment time (min)

...

Embodiment 2

[0058] The second possible embodiment of the present invention also includes the steps of ultrasonic treatment to separate coal ash components, carbon concentration treatment and activation of carbon concentration at high temperature, please refer to figure 1 Shown:

[0059] (1) Separation of coal ash components: first, coal ash and water are stirred and mixed, and the mixing ratio is the same as above, and ultrasonic waves are introduced into the mixed solution to cause the coal ash components to be fully dispersed;

[0060] (2) Carry out carbon concentration treatment: after step (1) ultrasonic treatment, then use wet screening to carry out carbon concentration treatment;

[0061] (3) Activation treatment: the carbon concentrate obtained after step (2) is activated with carbon dioxide, please refer to Figure 4 As shown, the activation treatment in a carbon dioxide (cm / min) atmosphere, the effect of temperature and time on increasing the specific surface area of ​​the prod...

Embodiment 3

[0068] The third feasible embodiment of the present invention also includes the steps of ultrasonic treatment to separate the composition of coal ash, carbon concentration treatment, and high-temperature activation of carbon concentrate. After the above steps are completed, the activated product is subjected to a wet screening step, To further improve the adsorption performance of the product, its implementation steps are:

[0069] (1) Separation of coal ash components: first, the coal ash and water are stirred and mixed, and ultrasonic waves are introduced into the mixed solution to cause the coal ash components to be fully dispersed;

[0070] (2) Carry out carbon concentration treatment: after step (1) ultrasonic treatment, then use wet screening to carry out carbon concentration treatment;

[0071] (3) Activation treatment: the high-temperature activation treatment is carried out on the carbon concentrates wet-screened in step (2);

[0072] (4) Carbon concentration treatme...

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Abstract

A method of preparing a sorbing material by coal ash is provided by the invention, which mainly utilizes the screening technique to separate unburned carbon from coal ash; the unburned carbon is then processed by vapor or carbon dioxide to cause a plurality of micro-holes forming on surface of the unburned carbon and becoming absorbing space that can contain micro-substance; the sorbing material thus prepared has high porosity, large adsorbance, high adsorbance efficiency and low cost, and can be used as a sorbing material for processing wastewater.

Description

technical field [0001] The invention relates to a method for making an adsorption material from coal ash. Specifically, the unburned carbon in the coal ash is separated by screening technology, and the surface treatment of the unburned carbon is carried out by using the steam activation technology, thereby preparing an adsorbent Large amount, good adsorption efficiency, and low cost, it is used as an adsorption material for wastewater treatment. Background technique [0002] The amount of coal ash generated is huge, about 2.1 million tons per year. Its reuse method is mainly as cement additives, and the reuse rate is about 60%. The remaining part needs to be treated as waste, because the amount is about one million More than tons, the difficulty of implementing treatment is high, which becomes an environmental protection problem. [0003] In addition to the above-mentioned utilization status, other possible uses of coal ash have also been proposed in relevant research liter...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30
Inventor 谢雅敏吴俊毅陈伟圣吴佳正萧庭哲蔡敏行
Owner 谢雅敏
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