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Low-energy incineration fly ash innocent treatment method and device

A technology of harmless treatment and incineration of fly ash, which is applied to chemical instruments and methods, transportation and packaging, and solid waste removal, etc., which can solve the problems of high treatment costs, incomplete treatment, and high energy consumption of dioxin heat treatment. Achieve the effects of avoiding damage, solving complex components, and saving pharmaceutical costs

Active Publication Date: 2017-09-08
TIANJIN ENEW ENVIRONMENTAL PROTECTION ENGCO LTD
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims at the problems of high processing cost of the existing incineration fly ash treatment technology, the inability to realize the true removal of heavy metals in stabilization treatment, high energy consumption and incomplete treatment of dioxin heat treatment, etc., and provides a low-energy consumption and harmless treatment of incineration fly ash Methods and devices aimed at:

Method used

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  • Low-energy incineration fly ash innocent treatment method and device
  • Low-energy incineration fly ash innocent treatment method and device
  • Low-energy incineration fly ash innocent treatment method and device

Examples

Experimental program
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Effect test

Embodiment 1

[0091] 1kg of fly ash from a domestic waste incineration plant is processed by this device, and the Cl in the washing mixture - The concentration is 151, the pickling pH is 4, the pickling time is 2h, and the stirring speed is 800r / min; the pH of the neutralization reaction in the first step is 6.5, and 20% Na 2 SO 4 Solution 17ml, the pH of the neutralization reaction in the third step is 7.7, and the pH of the neutralization reaction in the fourth step is 9.5; add 10% sulfuric acid solution to the oxidation reaction until the pH is 3.2, add iron powder and react for 20 minutes, add 30% H 2 o 2 Solution, aeration reaction 2h, the test results are shown in the following table:

[0092]

Embodiment 2

[0094] 1kg of fly ash from a domestic waste incineration plant is processed by this device, and the Cl in the washing mixture - The concentration is 102, the pickling pH is 4.5, the pickling time is 2.5h, and the stirring speed is 600r / min; the pH of the neutralization reaction in the first step is 6.7, and 20% Na 2 SO 4 Solution 27ml, the pH of the neutralization reaction in the third step is 7.9, and the pH of the neutralization reaction in the fourth step is 9.7; add 10% sulfuric acid solution to the oxidation reaction until the pH is 3.7, add iron powder and react for 20 minutes, add 30% H 2 o 2 Solution, aeration reaction 2h, the test results are shown in the following table:

[0095]

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PUM

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Abstract

The invention provides a low-energy incineration fly ash innocent treatment method. The low-energy incineration fly ash innocent treatment method and device are provided for solving the problems that an existing incineration fly ash treatment technology is high in cost, true removal of heavy metal cannot be achieved through stabilizing treatment, Dioxin heat treatment energy consumption is high, and treatment is not complete. Fly ash is subject to desalting, heavy metal removal and Dioxin removal in sequence, a one-valent saline solution with very high purity is obtained, and heavy metal sediment and building materials without contaminant can be subject to resource utilization.

Description

technical field [0001] The invention belongs to the field of solid waste treatment, in particular to a method for resourceful disposal of incineration fly ash. Background technique [0002] Incineration fly ash is the trappings of the flue gas purification system and the bottom ash settled at the bottom of the flue and chimney during the incineration of municipal solid waste. 3%~5% of the amount of garbage. According to the "Twelfth Five-Year Plan", by 2015, 262 new waste incineration facilities will be added, with a processing capacity of 219,000 tons per day. [0003] The moisture content of incineration fly ash is very low, and it is in the form of light gray powder. The particle size of fly ash is uneven, the structure is complex, and the properties are changeable. 100μm, and its surface is rough, with a larger specific surface and higher porosity. The mineral composition of incineration fly ash is very complex, mainly CaO, SiO 2 、Al 2 o 3 , Fe 2 o 3 Mainly, also...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00
CPCB09B3/00B09B2101/30
Inventor 马竞男谢迎辉芦珊珊
Owner TIANJIN ENEW ENVIRONMENTAL PROTECTION ENGCO LTD
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