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A kind of garbage fly ash processing method

A treatment method and technology of garbage fly ash, applied in chemical instruments and methods, solid waste removal, transportation and packaging, etc., can solve the problems of waste of resources, large volume increase of solidified body, large landfill space occupation, etc., and achieve reduction Treatment costs, proper treatment of flue gas, and high environmental benefits

Active Publication Date: 2021-10-19
陈彤 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the stabilized and solidified fly ash can enter the domestic waste landfill for landfill after meeting the relevant requirements of the "Pollution Control Standard for Domestic Waste Landfill Sites" (GB16889-2008), but the long-term pollution of heavy metals and other pollutants The stability is difficult to be guaranteed, and the volume of the solidified body is large, which takes up a lot of landfill space and the cost is high
[0003] At present, the common garbage fly ash recycling technology only focuses on the extraction of mixed salt, or only focuses on the resource disposal of building materials. Other valuable components in fly ash have not been recycled, which not only causes a waste of resources, Also generates new waste that needs to be disposed of

Method used

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  • A kind of garbage fly ash processing method
  • A kind of garbage fly ash processing method
  • A kind of garbage fly ash processing method

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Experimental program
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Effect test

Embodiment 1

[0122] This embodiment provides a method for treating garbage fly ash, and the method includes the following steps:

[0123] Step 1 Preprocessing:

[0124] Step 1.1 Washing: The garbage fly ash is washed with water in a cross-flow washing manner, the washing stages are 2, and the solid-liquid ratio of fly ash and washing water is 1:1; Obtain washing filtrate and filter mud A;

[0125] Step 1.2 removes organic matter: mix kerosene and the washing filtrate obtained in step 1.1 at a volume ratio of 1:8; the extraction stage is 1, the extraction temperature is 28 ° C, and the extraction is completed, and the organic waste liquid and the purified solution are obtained by phase separation;

[0126] Step 1.3 impurity removal: adjust the pH of the purified solution obtained in step 1.2 to 9.0, add the first impurity remover, and stir for 0.5 h until the reaction is complete. The first impurity remover is a mixture of dry desulfurization ash and sodium carbonate. After removing calc...

Embodiment 2

[0133] This embodiment provides a method for treating garbage fly ash, and the method includes the following steps:

[0134] Step 1 Preprocessing:

[0135] Step 1.1 Washing: take garbage fly ash as raw material, carry out countercurrent washing with water, the number of washing stages is 2, the solid-liquid ratio of fly ash and washing water is 1:3, the washing temperature is 35 ° C, and pressure filtration after washing is completed to obtain washing filtrate and filter mud A;

[0136] Step 1.2 Removal of organic matter: take D101 macroporous adsorption resin as adsorbent, fill it in the adsorption column, pass the washing filtrate obtained in step 1.1 from the bottom of the adsorption column, flow out from the top of the adsorption column, absorb the organic matter to obtain a purified solution, and enter the step 1.3 Continue processing. The organic matter adsorbed on the adsorption resin is dissolved and desorbed by butyl acetate to obtain an organic waste liquid.

[01...

Embodiment 3

[0144] This embodiment provides a method for treating garbage fly ash, and the method includes the following steps:

[0145] Step 1 Preprocessing:

[0146] Step 1.1 Washing: take garbage fly ash as raw material, carry out countercurrent washing with water, the number of washing stages is 3, the solid-liquid ratio of fly ash and washing water is 1:2, and the washing temperature is 15 ° C; after the washing, pressure filtration to obtain washing filtrate and filter mud A;

[0147] Step 1.2 Removal of organic matter: carry out countercurrent extraction of the washing filtrate in step 1.1 with diesel oil, and mix according to the volume ratio of diesel oil and washing filtrate as 1:10; the extraction stage is 2, the extraction temperature is 25 ° C, and the extraction is completed. After purification, the purified solution enters step 1.3 to continue processing;

[0148] Step 1.3 impurity removal: adjust the pH of the purified solution obtained in step 1.2 to 12.1, add the first i...

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Abstract

The invention provides a garbage fly ash treatment method, which includes five steps of pretreatment, smelting, metal recovery, building material production and salt extraction. The fly ash treatment process can simultaneously absorb various urban and industrial solid wastes. A variety of industrial products including metal products, building materials and crystallized salt have been obtained, which not only realizes the harmless treatment of garbage fly ash and relieves environmental pressure, but also transforms fly ash resources into a variety of products, realizing the protection of garbage fly ash. The recycling and utilization of ash to the greatest extent has dual values ​​of environmental protection and economy.

Description

technical field [0001] The invention relates to the technical field of garbage fly ash treatment, in particular to a garbage fly ash treatment method. Background technique [0002] With the rapid increase in the capacity of municipal solid waste incineration, the amount of waste fly ash is increasing. Since fly ash contains harmful components such as heavy metals and dioxins, it is classified as hazardous waste (HW18) and must be classified as hazardous waste. It is collected, stored, transported and disposed of according to relevant regulatory standards. At present, the main disposal method of garbage fly ash is stabilized solidification landfill. The new version of "Hazardous Waste Landfill Pollution Control Standard" (GB18598-2019) puts forward more stringent requirements for the landfill of hazardous waste. The salt content is as high as 20% to 30%, and it cannot be directly landfilled for hazardous waste. Although the stabilized and solidified fly ash can enter the d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09B3/00B09B5/00
CPCB09B3/00B09B5/00B09B3/80B09B2101/30B09B2101/02B09B3/40
Inventor 胡清李凯陈彤李贵珍王峰刘文斌邱军付刘欣
Owner 陈彤