Fly ash treatment method for waste incineration

A waste incineration fly ash and treatment method technology, applied in the field of environmental engineering, can solve problems such as heavy metal leakage, secondary pollution, and lower performance of asphalt, and achieve the effects of improving strength, reducing pollution, and reducing release

Inactive Publication Date: 2015-04-08
JIANGSU ZHONGYI ECOLOGICAL SOIL INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it will reduce the performance of asphalt in actual use, and on the other hand, there will still be a small amount of heavy metal leakage, causing secondary pollution

Method used

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  • Fly ash treatment method for waste incineration
  • Fly ash treatment method for waste incineration
  • Fly ash treatment method for waste incineration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0025] The present embodiment takes by weighing 500g of waste incineration fly ash, takes by weighing 250g of tap water, forms waste incineration fly ash mortar after stirring evenly, adds organic sulfur TMT15 in the mortar, because heavy metal content is higher (such as Pb: 1600mg / kg; As: 650mg / kg; Cd: 380mg / kg), the mass of organic sulfur TMT15 is 25g, stir for 10 minutes, add disodium hydrogen phosphate and calcium oxide, disodium hydrogen phosphate and calcium oxide to the stabilized mortar The molar ratio is 1:1, the mass sum of disodium hydrogen phosphate and calcium oxide is 150g, stir for 10 minutes, add ferric chloride in the mortar after solidification treatment, the mol ratio of ferric chloride and disodium hydrogen phosphate is 1:5, uniformly stirred for 5 minutes, placed the waste incineration fly ash slurry in a plastic mold, and maintained it for 7 days at room temperature and 95% humidity. The compressive strength and leaching toxicity tests were carried out on...

Embodiment 1

[0026] Example 1 Waste incineration fly ash solidified body test results Table 1

[0027]

Embodiment example 2

[0029] The present embodiment takes by weighing 500g of waste incineration fly ash, takes by weighing 250g of tap water, forms waste incineration fly ash mortar after stirring evenly, adds organic sulfur TMT15 in the mortar, because the heavy metal content in the fly ash is low (as Pb: 530mg / kg; As: 150mg / kg; Cd: 97mg / kg), the mass of organic sulfur TMT15 is 10g, stir for 10 minutes, add disodium hydrogen phosphate and calcium oxide, disodium hydrogen phosphate and calcium oxide to the stabilized mortar The molar ratio is 1:1, the mass sum of disodium hydrogen phosphate and calcium oxide is 50g, stir for 10 minutes, add ferric chloride in the mortar after solidification treatment, the mol ratio of ferric chloride and disodium hydrogen phosphate is 1:5, stirred evenly for 5 minutes, placed the waste incineration fly ash slurry in a plastic mold, and maintained it for 3 days at room temperature and 95% humidity. The compressive strength and leaching toxicity tests were carried o...

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Abstract

The invention discloses a fly ash treatment method for waste incineration and belongs to the technical field of environmental engineering. According to the treatment method, heavy metals such as Pb, Zn, Cd, Hg, Cu and the like in fly ash are converted into insoluble compounds by adding organic sulfur TMT15 into the waste incineration fly ash, so that the waste incineration fly ash is stabilized. By adopting calcium oxide and disodium hydrogen phosphate, the waste incineration fly ash is cured by forming a compact netted binder, so that the strength of the fly ash solidified body is improved and the pollutants in the fly ash are passivated; fly ash mortar is stabilized by using ferric chloride, and release of phosphorus in the fly ash solidified body is reduced by forming a phosphorous-iron stable compound. According to the method for solidifying and stabilizing the waste incineration fly ash, the environmental risk of the pollutants in the fly ash is reduced, and the capacity of the fly ash resisting environmental corrosion is enhanced; and the treatment method has the characteristics of good treatment effect, no secondary pollution, low cost and the like.

Description

technical field [0001] The invention discloses a treatment method for waste incineration fly ash, which belongs to the technical field of environmental engineering. Background technique [0002] In recent years, domestic waste incineration has attracted more and more attention due to its characteristics of large reduction and high resource utilization. However, toxic fumes, bottom slag and fly ash will be produced during the waste incineration process, which also restricts the popularization and application of this technology. Therefore, waste incineration pollution control has become a research hotspot in the field of environmental engineering. Taking waste incineration fly ash as an example, its output is about 2%-5% of the mass of domestic waste. Fly ash not only contains high concentrations of heavy metal pollutants such as Pb, Hg, Cu, Cd, Zn, Ni and Cr, but also Contains organic pollutants such as dioxin, therefore, waste incineration fly ash is included in the list o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A62D3/33A62D101/08A62D101/43
CPCA62D3/33A62D2101/08A62D2101/43
Inventor 李江山薛强张亭亭王平王富许越孟思明
Owner JIANGSU ZHONGYI ECOLOGICAL SOIL INST
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