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Method for utilizing incineration fly ash and bypass ash in combined manner

A technology for incinerating fly ash and bypass ash, which is applied in chemical instruments and methods, solid waste removal, transportation and packaging, and can solve the problems of difficult utilization of bypass ash and restrictions on the application of bypass technology

Active Publication Date: 2019-03-22
BEIJING BUILDING MATERIALS ACADEMY OF SCI RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, the problem of difficult utilization of bypass ash limits the further application of bypass technology to a certain extent. It often solves the impact of harmful element cycle enrichment on kiln process, but adds solid waste

Method used

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  • Method for utilizing incineration fly ash and bypass ash in combined manner

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] A combined use of bypass ash and incineration fly ash, such as figure 1 shown, including:

[0061] Step S1, stirring and mixing the bypass ash, tap water and dilute hydrochloric acid solution according to a certain ratio to form a mixed solution containing solids, the pH of the mixed solution containing solids is 5.5, and the mass ratio of the mixed water to the bypass ash is 4, The solid-liquid separation is carried out on the mixed solution containing the solid, and the first solution (containing a small amount of solid) and the first solid are separated.

[0062]Step S2, performing solid-liquid separation on the first solution in step S1 to obtain a first filtrate and a first filter residue, the first filtrate enters the next step process, and a small amount of solid exists in the first filtrate.

[0063] Step S3, the domestic incineration fly ash collected by the semi-dry method, tap water and dilute hydrochloric acid solution are stirred and mixed according to a c...

Embodiment 2

[0076] A method for combined use of bypass ash and incineration fly ash comprising:

[0077] Step S1, stirring and mixing the collected bypass ash, seawater and dilute hydrochloric acid solution according to a certain ratio to form a mixed solution containing solids, the pH of the mixed solution containing solids is 5, and the mass ratio of the mixed water to the bypass ash is 2.5. Perform solid-liquid separation on the mixed solution containing solids, and separate the first solution (containing a small amount of solids) and the first solid.

[0078] Step S2, performing solid-liquid separation on the first solution in step S1 to obtain a first filtrate and a first filter residue, the first filtrate enters the next step process, and a small amount of solid exists in the first filtrate.

[0079] Step S3, stirring and mixing the medical incineration fly ash, seawater and dilute hydrochloric acid solution collected by the dry method according to a certain ratio to form a mixed so...

Embodiment 3

[0092] A method for combined use of bypass ash and incineration fly ash comprising:

[0093] Step S1, stirring and mixing the kiln dust, industrial water and hydrochloric acid-sulfuric acid mixed acid dilute solution according to a certain ratio to form a mixed solution containing solids, the pH of the mixed solution containing solids is 4, and the mass ratio of the water after mixing to the kiln dust is 4, The solid-liquid separation is carried out on the mixed solution containing the solid, and the first solution (containing a small amount of solid) and the first solid are separated.

[0094] Step S2, performing solid-liquid separation on the first solution in step S1 to obtain a first filtrate and a first filter residue, the first filtrate enters the next step process, and a small amount of solid exists in the first filtrate.

[0095] Step S3, stirring and mixing the medical incineration fly ash collected by the semi-dry method, industrial water, and dilute hydrochloric aci...

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Abstract

The invention relates to a method for utilizing incineration fly ash and bypass ash in a combined manner. According to the method for utilizing the incineration fly ash and the bypass ash in the combined manner, based on full utilizing of existing resources and conditions of a cement enterprise, by reasonably arranging work procedures, stable running of the process is guaranteed, influences of rawmaterial component fluctuation on the process are avoided, various chemical products can also be obtained, and the additional value of the products is improved. In the method, sources of raw materials are convenient, the process route is reasonable, utilizing manners of the incineration fly ash and the bypass ash can be effectively expanded, emission reduction of carbon dioxide is achieved, and universal applicability and popularizing value are achieved.

Description

technical field [0001] The invention relates to a method for combined utilization of incineration fly ash and bypass ash, belonging to the direction of solid waste treatment in the field of environmental protection and resource utilization. Background technique [0002] Garbage incineration is one of the effective methods for the harmless treatment of municipal solid waste, medical waste and other garbage. Because the incineration fly ash contains a large amount of soluble heavy metals and dioxins, it cannot be directly landfilled, and the enrichment of incineration fly ash is harmful to the human body. Toxic components such as carcinogenic dioxins and furans are classified as hazardous wastes by existing environmental regulations at home and abroad, emphasizing that they must be disposed of safely. The main treatment methods for incineration fly ash at home and abroad include solidification and stabilization technology, wet chemical treatment method, safe landfill method, e...

Claims

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Application Information

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IPC IPC(8): B09B3/00B09B5/00
CPCB09B3/00B09B5/00B09B2101/30
Inventor 李寅明黄天勇
Owner BEIJING BUILDING MATERIALS ACADEMY OF SCI RES
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