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Method for simultaneously treating domestic garbage burning fly ash and domestic garbage leachate

A technology for domestic waste incineration and domestic waste, which is applied in chemical instruments and methods, water/sewage treatment, water/sludge/sewage treatment, etc. , dealing with high cost and other problems, to achieve the effect of heavy metal stabilization

Active Publication Date: 2014-03-12
广州环投永兴集团股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] At present, the cement solidification method, asphalt solidification, inorganic chemical drug stabilization, organic chemical stabilization, high temperature melting and other fly ash treatment methods commonly used for fly ash treatment either have a large volume increase ratio, or have long-term stability problems, or The cost of disposal is high, or the landfill standard of domestic waste cannot be met, so it has not been well promoted and applied.

Method used

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  • Method for simultaneously treating domestic garbage burning fly ash and domestic garbage leachate
  • Method for simultaneously treating domestic garbage burning fly ash and domestic garbage leachate
  • Method for simultaneously treating domestic garbage burning fly ash and domestic garbage leachate

Examples

Experimental program
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Effect test

Embodiment 1

[0026] The present invention has following steps:

[0027] A. Add 5~15 parts of stabilizing agent (dry powder) in parts by mass to the fly ash with 100 parts by mass while stirring at room temperature at a speed of 20-30r / min. Stir and mix continuously at a speed of 20-30r / min for 5-10 minutes to form a uniform fly ash + pharmaceutical powder mixture. The stabilizing agents include one or more of organic and inorganic stabilizing agents;

[0028] B. Add 20-50 parts of RO concentrated solution of domestic waste leachate to the powdery mixture obtained in step A at normal temperature while stirring at a speed of 20-30r / min. Stir continuously at 30r / min to form a uniform mortar mixture;

[0029] C. Leave the mortar mixture obtained in step B to stand for 1 to 2 days, and then enter the landfill for landfill treatment.

Embodiment 2

[0031] Same as Example 1, except that the organic agent in the stabilizing agent is a polymer chelating agent and includes imines (such as poly-N-carboxyethylethyleneimine), carbamates (such as ethylenediaminetetracarboxylic acid) disodium) and dithiocarbamate-based chelating agents (such as sodium dithiocarbamate).

Embodiment 3

[0033] Same as Example 1, except that the inorganic agents in the stabilizer agents are sulfur-based (such as sodium sulfide) and phosphorus-based agents (such as hydroxyethylenediphosphine).

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Abstract

The invention relates to a method for treating garbage burning fly ash, in particular to a method for simultaneously treating fly ash which is produced after domestic garbage is burnt and concentrated liquid which is produced after domestic garbage leachate is subjected to reverse osmosis (RO) treatment so as to perform landfilling. The invention discloses a method which comprises the following steps of: mixing a stabilization medicament, the RO concentrated liquid of the domestic garbage leachate and the fly ash in a mass part ratio to obtain an ash-slurry mixture, standing and performing the landfilling treatment in a landfill. The method has the advantages that: the method is low in treatment cost and stable in effect, the environment is protected from secondary pollution, and the garbage burning fly ash and the RO concentrated liquid can be treated simultaneously; and the method is convenient to popularize and apply.

Description

technical field [0001] The invention relates to a harmless and stable treatment method for hazardous waste and highly difficult waste water, which belongs to the technical field of solid waste treatment and high-concentration organic waste water treatment. The fly ash produced after garbage incineration and domestic garbage leachate are treated by RO to produce concentrated liquid for landfill. Background technique [0002] Fly ash is domestic waste in the incineration process (about 850 ° C), some fine ash particles are brought into the waste heat boiler and flue gas purification device with the flue gas, and the small particles collected by the dust removal function of the boiler and purified by the flue gas The fine dust collected by the dust removal device (bag filter), the mixture of these two parts is collectively called fly ash. Fly ash contains a large amount of heavy metals, dioxins, lime and activated carbon, etc. According to my country's national hazardous waste...

Claims

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Application Information

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IPC IPC(8): B09B3/00C02F1/00
Inventor 汪屈峰黄江涛卢圣良张焕亨罗翠红吴江华陈清刘佳
Owner 广州环投永兴集团股份有限公司