Treatment method for synergistically solidifying waste incineration fly ash and evaporation concentrated solution obtained after waste membrane treatment

Abstract

The invention discloses a treatment method for synergistically solidifying waste incineration fly ash and an evaporation concentrated solution obtained after waste membrane treatment. The method comprises the following steps: reducing the water content of the evaporation concentrated solution obtained after film treatment of waste to 35-40% to obtain a mother solution; heating asphalt to form pasty asphalt, adding the mother liquor, and stirring to form a pasty mixture; mixing the waste incineration fly ash with a curing agent, and stirring to form a solid mixture; mixing the slurry mixture with the solid mixture, adding an additive, a heavy metal chelating agent and water, and stirring to obtain a mixed material; and putting the obtained mixed material into a mold, standing and maintaining to form a solidified body. The treatment method has the advantages that auxiliary materials are simple and easy to obtain, the cost is low, the process is simple, operation is convenient, the curing effect is good, the reduction effect is good and the like, the problem of final treatment of the evaporation concentrated solution and the waste incineration fly ash after waste membrane treatment can be effectively solved, and the treatment method has very high use value and application prospects.

Description

technical field [0001] The invention relates to a processing method for synergistically solidifying waste incineration fly ash and evaporated concentrated liquid after waste film treatment, in particular to a treatment method for cooperative chelation and solidification of waste incineration fly ash and evaporated concentrated liquid after waste film treatment. Background technique [0002] In the process of garbage incineration, the organic matter in the garbage is mainly discharged in the form of gaseous substances; while the inorganic matter mainly forms solid particles, and some fine particles settle down at the bottom of the flue and chimney. These fine particles that are captured and settled Particulate matter is known as waste incineration fly ash. During the municipal solid waste incineration process, the quantity of waste incineration fly ash can reach 2-4% of the total mass of waste. Waste incineration fly ash often contains high concentrations of heavy metals, su...

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Problems solved by technology

[0007] (3) There are many curing auxiliary materials added, the process is complicated, and the volume expansion ratio is large;

[0008] (4) The mother liquor formed after the concentrated solution is highly concentrated again by membrane method or evaporation contains high concentration of salts, which can easily cause the solidified body to rupture, increase permeability, and reduce cement strength;

[0009] (5) Only focus on the leaching of heavy metals, without considering the problem that after the waste film treatment, the evaporated concentrated solution is co-cured to form a module, and the salt and COD of the evaporated concentrated solution inside the module will still be leached in large quantities

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