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Preparation method of modified fly ash adsorbent

A fly ash and adsorbent technology, applied in chemical instruments and methods, other chemical processes, etc., can solve problems that are not conducive to the large-scale and rapid preparation of modified fly ash adsorbents, demanding industrial equipment, and difficult solid-liquid separation, etc. problems, to achieve the effect of less environmental pollution, fast economy and simple operation

Inactive Publication Date: 2012-08-15
HUBEI FORBON TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the preparation method of modified fly ash adsorbent is mainly through acid reaction and alkali reaction, but the procedures of acid reaction and alkali reaction are cumbersome, solid-liquid separation is difficult, and the requirements for industrial equipment are relatively harsh.
It is not conducive to the large-scale and rapid preparation of modified fly ash adsorbent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] 1) Pretreatment of the raw material fly ash: the raw material fly ash is dried in a drying box at 80°C, then ground, and passed through a 200-mesh sieve;

[0016] 2) Thermal modification treatment of fly ash: the pretreated fly ash and sodium carbonate are mixed in a mass ratio of 5:1 and then put into a muffle furnace for roasting. The roasting temperature is 250° C. and the roasting time is 3 hours;

[0017] 3) Grinding of the roasted product: Grinding the roasted product with a pulverizer to obtain a modified fly ash powder;

[0018] 4) Preparation of the modified fly ash adsorbent: the modified fly ash powder and calcium oxide are mixed in a mass ratio of 100:1, and the modified fly ash adsorbent is obtained by a conventional granulation method;

[0019] 5) Treat actual wastewater with modified fly ash: Take 10 grams of modified fly ash adsorbent and add it to 100 ml of actual phosphorus-containing wastewater, in which the phosphorus concentration is 1800 mg / L and t...

Embodiment 2

[0021] 1) Pretreatment of the raw material fly ash: the raw material fly ash is dried in a drying box at 80°C, then ground, and passed through a 200-mesh sieve;

[0022] 2) thermal modification treatment of fly ash: the pretreated fly ash and sodium carbonate are mixed in a mass ratio of 1:1 and then put into a muffle furnace for roasting, the roasting temperature is 500°C, and the roasting time is 2 hours;

[0023] 3) Grinding of the roasted product: Grinding the roasted product with a pulverizer to obtain a modified fly ash powder;

[0024] 4) Preparation of the modified fly ash adsorbent: the modified fly ash powder is mixed with magnesium chloride in a mass ratio of 100:2, and the modified fly ash adsorbent is obtained by a conventional granulation method;

[0025] 5) Modified fly ash to treat actual wastewater: Take 10 grams of modified fly ash adsorbent and add it to 100 ml of actual phosphorus-containing wastewater, in which the phosphorus concentration is 1500 mg / L and...

Embodiment 3

[0027] 1) Pretreatment of the raw material fly ash: the raw material fly ash is dried in a drying box at 80°C, then ground, and passed through a 200-mesh sieve;

[0028] 2) thermal modification treatment of fly ash: the pretreated fly ash and sodium carbonate are mixed in a mass ratio of 10:1 and put into a muffle furnace for roasting, the roasting temperature is 100°C, and the roasting time is 5 hours;

[0029] 3) Grinding of the roasted product: Grinding the roasted product with a pulverizer to obtain a modified fly ash powder;

[0030] 4) Preparation of the modified fly ash adsorbent: the modified fly ash powder and polyacrylamide are mixed in a mass ratio of 100:5, and the modified fly ash adsorbent is obtained by a conventional granulation method;

[0031] 5) Treat actual wastewater with modified fly ash: Take 10 grams of modified fly ash adsorbent and add it to 100 ml of actual phosphorus-containing wastewater, in which the phosphorus concentration is 1000 mg / L and the n...

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Abstract

The invention discloses a preparation method of a modified fly ash adsorbent, comprising the following steps of: 1) pre-treating a raw material, i.e., fly ash; 2) performing thermal modification treatment on the fly ash; 3) preparing a modified fly ash body; and 4) mixing the fly ash and an adsorbent aid and granulating to obtain the modified fly ash adsorbent. The adsorbent can be used for treating elements of nitrogen and phosphorus in a eutrophic water body. The adsorbent synthesised by the preparation method of a modified fly ash adsorbent disclosed by the invention has the advantages of being simple in operation, economic and rapid, high in synthesis safety, less in environmental pollution and the like, can be used for treating domestic sewage and industrial sewage containing nitrogen and phosphorus, thereby opening up a new development prospect for reasonable utilization of resources and economic and rapid treatment of sewage containing nitrogen and phosphorus.

Description

Technical field: [0001] The invention relates to a preparation method of a modified fly ash adsorbent, and belongs to the technical field of preparation of a fly ash adsorbent. Background technique: [0002] Fly ash is a fine-grained dispersed residue after coal or coal powder combustion, mainly derived from the discharged industrial waste. With the rapid development of the economy and the increase of coal consumption, the emission of fly ash is also increasing day by day. Most of the fly ash in developed countries has been commercialized and resourced. The United States has listed fly ash as the seventh of the 12 solid resources, and the comprehensive utilization rate of some European countries has reached 100%. my country is the country with the largest coal consumption in the world, but the utilization rate of fly ash in our country is only 25%. Therefore, it is the general trend to expand the comprehensive utilization of fly ash. [0003] Fly ash itself has many spheri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/26B01J20/30
Inventor 宋功武王仁宗何瑜钟书华
Owner HUBEI FORBON TECH
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