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Method for treating waste incineration fly ash

A waste incineration fly ash and treatment method technology, applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problems of heavy metal leakage, secondary pollution, etc., to prevent heavy metal seepage and save usage , Improve the effect of wettability

Inactive Publication Date: 2013-08-14
NANJING INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problem of heavy metal leakage in the prior art when treating waste incineration fly ash, which easily causes secondary pollution, the present invention provides a treatment method for waste incineration fly ash, which can effectively turn waste into treasure , effective use of resources, and will not cause secondary pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A method for processing waste incineration fly ash, the steps of which are:

[0027] 1) 500 parts of waste incineration fly ash, 10 parts of aminotrimethylene phosphonic acid, 5 parts of sodium ethylenediamine tetramethylene phosphonate, 20 parts of calcium oxide with a particle size of 0.025mm or less, and 200 parts of silicic acid Sodium and 25 parts of sodium fluorosilicate are mixed and stirred evenly.

[0028] 2) Mix acrylic acid, mercaptopropionic acid and water in a mass ratio of 1:1:50 to form an aqueous solution.

[0029] 3) Add the aqueous solution in step 2) to the mixture in step 1), the mass ratio of the aqueous solution to the mixture is 9:10, mix and stir to make waste incineration fly ash particles with a diameter of 0.5-1 mm, and dry them. Drying is heating at 90°C for 50 minutes.

[0030] Prepare the concrete for the ground, according to the mass ratio: 300 parts of Portland cement of 42.5MPa, 1300 parts of gravel, 500 parts of sand (the sand mention...

Embodiment 2

[0034] 1) 500 parts of waste incineration fly ash, 5 parts of aminotrimethylene phosphonic acid, 9 parts of sodium ethylenediamine tetramethylene phosphonate, 50 parts of calcium oxide with a particle size less than or equal to 0.025mm, and 100 parts of silicic acid Sodium and 10 parts of sodium fluorosilicate are mixed and stirred evenly;

[0035] 2) Mix acrylic acid, mercaptopropionic acid and water in a mass ratio of 1:1:50 to form an aqueous solution;

[0036] 3) Add the aqueous solution in step 2) to the mixture in step 1), the mass ratio of the aqueous solution to the mixture is 7:10, mix and stir to make waste incineration fly ash particles with a diameter of 1-2 mm, and dry them. Drying is by heating at 75°C for 50 minutes.

[0037]Prepare the concrete for the ground, according to the mass ratio: 400 parts of Portland cement of 42.5MPa, 1350 parts of stones, 500 parts of sand (the sand mentioned here includes waste incineration fly ash particles accounted for 20%) and...

Embodiment 3

[0041] 1) 500 parts of waste incineration fly ash, 8 parts of aminotrimethylene phosphonic acid, 3 parts of sodium ethylenediamine tetramethylene phosphonate, 35 parts of calcium oxide with a particle size of 0.025mm or less, and 150 parts of silicic acid Sodium and 18 parts of sodium fluorosilicate are mixed and stirred evenly;

[0042] 2) Mix acrylic acid, mercaptopropionic acid and water in a mass ratio of 1:1:50 to form an aqueous solution;

[0043] 3) Add the aqueous solution in step 2) to the mixture in step 1), the mass ratio of the aqueous solution to the mixture is 8:10, mix and stir to make waste incineration fly ash particles with a diameter of 1.0-1.5 mm, and dry them. Drying is heating at 60°C for 50 minutes.

[0044] Prepare the concrete for the ground, according to the mass ratio: 350 parts of Portland cement of 42.5MPa, 1450 parts of stones, 500 parts of sand (the sand mentioned here includes 35% of waste incineration fly ash particles) and 155 parts of water ...

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Abstract

The invention discloses a method for treating waste incineration fly ash, and belongs to the field of waste fly ash treatment. The method comprises the following steps: 1) mixing 500 parts of waste incineration fly ash, 5-10 parts of amino trimethylene phosphonic acid, 3-9 parts of ethylene diamine tetramethylene phosphonic acid sodium, 20-50 parts of calcium oxide with a particle size of less than or equal to 0.025 mm, 100-200 parts of sodium silicate, and 10-25 parts of sodium fluosilicate, and uniformly stirring the obtained mixture; 2) mixing acrylic acid, thiohydracrylic acid and water in a mass ratio of 1:1:50 so as to form an aqueous solution; and 3) adding the aqueous solution obtained in the step 2) into the mixture obtained in the step 1), mixing and stirring the obtained product so as to obtain waste incineration fly ash particles with a diameter of 0.5-2 mm, and drying the particles, wherein the mass ratio of the aqueous solution to the mixture is 7-9:10. According to the invention, the seepage of heavy metals in waste incineration fly ash can be effectively prevented, and the fly ash and concrete are firmly fixed in the process of concrete preparation, thereby achieving an effect that one object serves dual purposes, and an effect of energy conservation and environmental protection.

Description

technical field [0001] The invention belongs to the field of garbage fly ash treatment, and in particular relates to a treatment method for garbage incineration fly ash. Background technique [0002] There are two main traditional methods of dealing with municipal waste: landfill and incineration. There are some obvious defects in landfill treatment. This treatment method pollutes the underground environment more seriously, so now this treatment method is gradually reduced; the advantage of incineration is that it greatly reduces the volume of garbage and reduces the pollution of garbage to the environment. , and then go through harmless treatment such as cement curing. At present, the number of urban waste incineration power generation equipment in various parts of my country is increasing significantly, and is developing towards large-scale development, and the fly ash and ash produced are prone to secondary pollution. Therefore, harmless disposal and comprehensive utili...

Claims

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Application Information

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IPC IPC(8): C04B18/06
CPCY02W30/91
Inventor 殷余余张厚先
Owner NANJING INST OF TECH
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