Method for harmless treatment of incineration fly ash and composite structure made thereof

A technology of harmless treatment and treatment method, which is applied in the field of incineration fly ash treatment, can solve the problems of limited burial land, increase of treatment cost, waste of raw materials, etc., and achieve the effect of improving environmental protection, improving economic benefits, and improving economic benefits

Inactive Publication Date: 2015-05-20
柴浣兰 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, with the increase in the amount of waste caused by changes in consumption patterns, the amount of fly ash produced after incineration also tends to increase. The practice of using landfill to dispose of fly ash will face the problem of limited land for burial
In addition, covering incineration fly ash with cement can prevent the release of toxic components such as heavy metals in the fly ash, but the use of a large amount of cement raw materials will easily lead to waste of raw materials and increase processing costs

Method used

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  • Method for harmless treatment of incineration fly ash and composite structure made thereof
  • Method for harmless treatment of incineration fly ash and composite structure made thereof
  • Method for harmless treatment of incineration fly ash and composite structure made thereof

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specific example 1

[0042] Detection method:

[0043] The present invention is based on the Environmental Protection Agency's industrial waste toxicity characteristic dissolution procedure detection method (NIEA R201.14C) test to carry out the toxicant characteristic dissolution procedure (TCLP) test on the following test pieces and incineration fly ash powder. Among them, because the literature (please refer to the following "References" 1-11) shows that heavy metals with low boiling points such as Pb, Zn, Cu, Cd and Cr are the heavy metals in the incineration fly ash that are more likely to exceed the TCLP dissolution test standard, Therefore, the dissolution concentration of Pb, Zn, Cu, Cd and Cr is used as the detection target here, and based on this, it is judged whether the treatment method of the present invention helps to reduce the release of the aforementioned heavy metals, and can exert effective treatment effects.

[0044] "references":

[0045] 1. Zhuang Jiarong, Research on the Eff...

specific example 2

[0077] (1) Pretreatment of incineration fly ash: According to the method described in step (1-1) of , the fly ash component is obtained through pretreatments such as drying and sieving.

[0078] (2) PET pretreatment and blending with the fly ash component: the recovered PET waste is cut and crushed into particles with an average particle size of about 1 mm to obtain PET plastics, and the fly ash component is mixed with PET The plastics are mixed according to the following weight ratios: (b2) 1:99; (c2) 3:97; (d2) 4:96; (e2) 5:95; and (f2) 10:90 to obtain the admixture b3 respectively , c3, d3, e3, f3, and take the same amount of PET plastic without fly ash component as the control group a3, that is, the weight ratio of fly ash component to PET plastic in the control group a3 is 0:100.

[0079] (3) The plastics of the control group a3 and the admixtures of b3 to f3 are made into plastic master batches: the above-mentioned plastics and the admixtures in different proportions are...

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Abstract

A method for harmless treatment of incineration fly ash and a composite structure made thereof are provided. The treatment method comprises firstly sieving and drying incineration fly ash to obtain a powder fly ash component with a moisture content lower than or equal to 0.5 wt%; then adding, in the fly ash component, poly(ethylene terephthalate) plastics which have a grain diameter smaller than or equal to 1 mm and are already subjected to drying treatment, so as to obtain an admixture; and performing hot-press molding of the admixture which then is made into a composite structure wrapping the incineration fly ash. The fly ash can be tightly wrapped in the structure, by mixing the poly(ethylene terephthalate) plastics in the fly ash and performing hot-press molding to form the specific structure. In addition to reduction of the waste amount of the fly ash and the pollution of air and dust, heavy metal or toxic components in the fly ash are effectively prevented from being released, thereby satisfying the environmental protection demand and also achieving the practical values.

Description

technical field [0001] The invention relates to a treatment method of incineration fly ash, in particular to a harmless treatment method of incineration fly ash and a composite structure prepared therefrom. Background technique [0002] In countries with limited land, the main treatment method of waste is incineration. The incinerated waste ash contains 5-8% of the total waste fly ash, because the fly ash contains heavy metals with high concentration and easily exceeds the domestic control standards. (Cd, Pb, Zn, Cr and Cu), may harm the environment and human body, therefore, fly ash after incineration is usually classified as hazardous waste and needs to be managed. At present, the domestic and foreign treatment of fly ash is mainly to bury the fly ash after solidification treatment with cement coating or as a paving material. [0003] However, with the increase in the amount of waste caused by changes in consumption patterns, the amount of fly ash produced after incinerat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/02C08K9/00
Inventor 柴浣兰周锦东
Owner 柴浣兰
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