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Method for processing fly ash from burning of garbage

A technology of waste incineration fly ash, treatment method, applied in the field of waste treatment, to achieve the effect of avoiding pollution

Inactive Publication Date: 2014-06-11
DALIAN DONGTAI INDAL WASTE TREATMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a treatment method for waste incineration fly ash, which overcomes the defects of a single fly ash treatment method and utilizes the processed fly ash as a resource

Method used

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Embodiment 1

[0019] The method for treating fly ash of waste incineration comprises the following steps:

[0020] (1) Add water to the fly ash, wash with water for 1 hour, and filter to obtain the filter residue;

[0021] (2) Add the filter residue to the mixed acid solution for heavy metal extraction;

[0022] (3) Using ion exchange resin to recover the mixed acid solution after (2) extracting heavy metals;

[0023] (4) The filter residue treated in step (2) is melted and solidified, and the solidified ash residue can be used as a building material resource.

[0024] In this embodiment, the mixed acid solution in step (2) is a mixed solution of sulfuric acid, hydrochloric acid and nitric acid; further, the concentration of hydrogen ions in the mixed acid solution is 6 mol / L.

[0025] In the technical solution provided by the present invention, the conditions for extracting heavy metals in step (2) are to maintain the mixed acid solution in a water bath at 30° C., and extract for 1 hour....

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Abstract

The invention provides a method for processing fly ash from burning of garbage, which comprises the following steps: adding water in fly ash and washing, filtering to obtain filter residue; adding the filter residue in a mixed acid solution for extracting heavy metal, using ion exchange resin to recover the mixed acid solution after extracting the heavy metal; fusing the filter residue after extracting by acid, and then solidifying to obtain the fly ash which can be taken as a building material for resource utilization.

Description

technical field [0001] The invention belongs to the field of waste treatment, in particular to a treatment method for fly ash produced by waste incineration. Background technique [0002] With the rapid development of the economy and the rapid improvement of people's living standards, the generation of urban solid waste in my country has increased sharply. The sharp increase in the discharge of urban waste has become an important factor restricting economic development and a threat to the living environment of human beings. How to treat these wastes economically and effectively and prevent pollution has increasingly become a hot issue that the whole society pays attention to urgently and needs to be solved. . [0003] Fly ash produced after incineration of domestic waste accounts for about 5% of the mass of waste. Fly ash is the material collected in the heat recovery system and flue gas purification system after incineration. The output of fly ash is related to the type ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00
Inventor 刘佳丽
Owner DALIAN DONGTAI INDAL WASTE TREATMENT
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