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Method for processing incineration fly ash with composite medicament

A technology of incinerating fly ash and composite chemicals, which is applied in the direction of solid waste removal, etc., can solve the problems of large doses of chemicals and high treatment costs, and achieve the effects of reducing treatment costs, stabilizing the effect, and consolidating the treatment effect

Active Publication Date: 2012-04-18
SHANGHAI ENVIRONMENTAL ENG DESIGN & RES INST CO LTD +1
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  • Claims
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Problems solved by technology

After the introduction of the new pollution control standard for domestic waste landfills (GB16889-2008), more stringent requirements were put forward for the leaching concentration of heavy metals in fly ash. It can meet the requirements of the GB16889-2008 standard, but the dosage is large and the processing cost is high

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  • Method for processing incineration fly ash with composite medicament
  • Method for processing incineration fly ash with composite medicament
  • Method for processing incineration fly ash with composite medicament

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specific Embodiment

[0030] A specific embodiment of the method of using composite agent of the present invention to process incineration fly ash is as follows:

[0031] The incineration fly ash of a domestic waste incineration plant is required to enter the domestic waste landfill for final disposal after stabilization treatment, and its pollution control standard is "Pollution Control Standard for Domestic Waste Landfill Site" (GB16889-2008). According to the "Solid Waste Leaching Toxic Leaching Method Acetic Acid Buffer Solution Method" (HJ / T300-2007) leaching method to detect heavy metals Pb and Cd exceeded the toxic leaching identification standard. Process this incineration fly ash according to the method of the present invention, its step is as follows:

[0032] 1. Weigh 5g of sodium phosphate and mix it with 10ml of water, stir evenly to get sodium phosphate solution, mix this sodium phosphate solution with 100g fly ash, stir for 15min to mix fly ash and sodium phosphate solution evenly, a...

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Abstract

The invention relates to a method for processing incineration fly ash with a composite medicament. The method which adopts a medicament A combined inorganic phosphorus medicament and a medicament B organic sulfur chelating agent as heavy metal stabilizing agents comprises the following steps: 1, mixing the incineration fly ash with an aqueous solution of the medicament A, and stirring for 10-30min to uniformly mix the flash ash with the medicament A to obtain a mortar A; 2, mixing the mortar A with an aqueous solution of the medicament B, and stirring for 10-30min to uniformly mix the flash ash with the medicament B to obtain a mortar B; and 3, maintaining the mortar B under natural ventilation conditions for over 24h, and preferably 24-36h to make effective components in the composite medicament be fully reacted with heavy metals in the flash ash, and conveying to a safe landfill. By adopting the method in the invention, the inorganic phosphorus medicament and the organic sulfur medicament mutually compensate each other, so the heavy metals in the incineration fly ash are efficiently stabilized, the usage amount of the composite medicament is reduced, and the flash ash processing cost is reduced.

Description

technical field [0001] The invention belongs to the field of solid waste treatment and disposal in environmental protection, and in particular relates to a method for treating waste incineration fly ash with a compound agent. Background technique [0002] Incineration as a routine disposal method of domestic waste has attracted more and more attention, but municipal solid waste incineration will produce domestic waste incineration fly ash (hereinafter referred to as fly ash) equivalent to 2% to 5% of the original municipal solid waste mass. It is predicted that in 2012, the daily output of fly ash in major cities in my country will exceed 1,500 tons, and the annual output will reach 450,000 tons to 500,000 tons. Fly ash contains a high content of Cd, Pb, Zn, Cr and other harmful heavy metal substances and salts that can be leached by water. If not handled properly, it will cause heavy metal migration, pollute groundwater, soil and air, and belong to hazardous waste. It must...

Claims

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Application Information

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IPC IPC(8): B09B3/00B09B5/00A62D3/33A62D101/43
Inventor 陈善平张益赵爱华张瑞娜王娟邰俊袁文祥李晓勇
Owner SHANGHAI ENVIRONMENTAL ENG DESIGN & RES INST CO LTD
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