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Mixed drying agent and preparation method thereof

A desiccant and drying technology, applied in separation methods, chemical instruments and methods, dispersed particle separation, etc., can solve the problems of inability to achieve environmental protection and green treatment, pollute soil, water and atmosphere, etc., and achieve improved hygroscopic performance, good regeneration, The effect of environmental cost

Inactive Publication Date: 2018-09-21
QINZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, the above-mentioned treatments more or less have land occupation, polluted soil, water and air hazards, and cannot achieve environmental protection and green treatment.

Method used

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  • Mixed drying agent and preparation method thereof
  • Mixed drying agent and preparation method thereof
  • Mixed drying agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Take fly ash, egg shell and α-Al 2 o 3 , dried at 120°C until the water content was 5%, then roasted at 500°C for 2 hours, taken out, crushed, and weighed the crushed fly ash and egg shells according to the weight ratio of 1:0.5:0.7 and α-Al 2 o 3 , mixed evenly to obtain a mixed desiccant.

Embodiment 2

[0039] Repeat Example 1, the difference is that the roasting time is 3h.

Embodiment 3

[0041] Repeat Example 1, the difference is that fly ash, egg shell and α-Al 2 o 3 They were respectively dried at 100° C. until the water content was 7%, and the roasting time was 4 hours.

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PUM

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Abstract

The invention discloses a mixed drying agent and a preparation method thereof. The mixed drying agent is prepared from coal ash, eggshell and alpha-Al2O3 in the weight ratio of 1:0.5:0.7. The preparation method includes the steps that coal ash, eggshell and alpha-Al2O3 are taken, dried respectively, roasted at 500 DEG C respectively, taken out, and smashed respectively; then, the roasted coal ash,eggshell and alpha-Al2O3 are weighed according to the formula and mixed evenly to obtain the mixed drying agent. By adding the eggshell and alpha-Al2O3 auxiliaries in a specific ratio, the moisture absorption performance of the drying agent is effectively improved compared with original coal ash; besides, the obtained drying agent is good in regenerability.

Description

technical field [0001] The invention relates to a desiccant, in particular to a mixed desiccant and a preparation method thereof. Background technique [0002] Solid waste in waste incineration power plants mainly includes two types: slag (also called bottom ash, BA, MSWI, etc.) and fly ash (also called fly ash, MSWI, FA, etc.), the amount of which is about 17%. Among them, fly ash is a fine powder of off-white or dark gray, with low moisture content, generally rod-shaped, polygonal, cotton-wool-shaped, spherical and other amorphous states; its particle size is different, with high porosity and specific surface area. Great features. At present, there are two ways to produce fly ash, one is coal combustion method, and the other is garbage incineration method. [0003] In the prior art, the application of the solid waste fly ash produced by power plants is mainly in the following aspects: [0004] (1) Building materials: mainly used as cement ingredients, civil engineering...

Claims

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Application Information

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IPC IPC(8): B01D53/28
CPCB01D53/28
Inventor 王伟建覃小玲石海信卢颖战浩
Owner QINZHOU UNIV
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