Heavy metal stabilizer for disposing waste incineration flying ash, and usage method thereof

Abstract

The invention relates to a heavy metal stabilizer for treating waste incineration fly ash and a method for using the same. Composition of alkaline substances and silicate minerals and/or adsorbents. The use method includes: fully stirring and mixing phosphate, inorganic alkaline substances, silicate minerals and/or adsorbents in proportion, and then adding waste incineration fly ash for maintenance. The invention does not contain any organic chelating agent such as dithiocarbamate or sulfide, has no secondary pollution and pollution-free; the method of use is simple, the cost is low, and it meets the benefits of energy saving and carbon reduction, economic benefits, and has good application prospects.

Description

technical field [0001] The invention belongs to the field of heavy metal stabilizers, in particular to a heavy metal stabilizer for treating waste incineration fly ash and a use method thereof. Background technique [0002] Domestic waste incineration fly ash is mostly processed by chelation solidification, mainly using organic chelating agents and supplemented by inorganic curing agents such as cement. It is a processing method in which cement and organic chelating agent solution are mixed with fly ash, stirred, bonded and solidified into hard blocks. [0003] Commonly used heavy metal stabilization agents can be divided into inorganic agents and organic agents. Organic agents mainly use polymers as chelating agents, mainly including pyrrolidine series, imine series, thiourea, carbamate series and dithiocarbamic acid. Salt system, etc., the principle of action is to contain heavy metals in the molecule to generate insoluble reactants, so as to achieve the purpose of stabil...

AI Technical Summary

Problems solved by technology

Although the combination of adding inorganic phosphorus-based agents or alkaline agents is used at the same time, there are no scientific literature and data to prove that the mixture of dithiocarbamate and inorganic phosphorus-based agents or alkaline agents will become difficult to decompose, so , there is no way to judge the long-term stability of the stabilizers used in these inventions, and it is also impossible to evaluate the part of the dithiocarbamic acid compound used in the methods of these inventions, the part of the unstabilized phosphorus-based minerals, and the temperature, humidity, and pH. In the changing landfill environment, especially after long-term (several months, half a year or even longer) immersion in acid rain, whether the result will still be decomposed, heavy metals will be dissolved again, or even some dithiocarbamic acid compounds may be decomposed Produces toxic substances such as hydrogen sulfide, carbon disulfide, methylamine, or even ethylene thiourea

If this is the case, the original environmental protection project becomes a pollution project enriched with heavy metals or multiple compound toxic substances, which may eventually cause serious secondary pollution pollution, and even landfills in many places bloom everywhere, spreading poisons and causing serious environmental pollution. Remedy is required for incidents, and more expenses will be required to deal with the aftermath

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