Unlock instant, AI-driven research and patent intelligence for your innovation.

Point-to-point directional treatment and utilization method for waste incineration fly ash

A waste incineration fly ash, point-to-point technology, applied in chemical instruments and methods, landfill technology, cement production, etc. problems such as solidification and removal of pollutants such as chlorine and other pollutants

Active Publication Date: 2022-07-08
LIAONING HAITIANGE ENVIRONMENTAL PROTECTION TECH +1
View PDF12 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this harmless disposal method, the solidified and stabilized products of waste incineration fly ash can only be stored as hazardous waste (such as solidified body, etc.) in designated landfills, and cannot be used as resources, resulting in cost and double waste of resources; for example, Chinese invention patent CN109909262B discloses a treatment method for synergistic solidification of waste incineration fly ash and waste concentrate, which is to treat waste incineration fly ash by curing base material, curing agent, waste concentrate, stabilizer, etc. The ash is solidified to form a solidified body of waste incineration fly ash, and finally the solidified body is only placed in a designated area of ​​the landfill for storage or landfill, and the resource utilization of waste incineration fly ash has not been realized; A non-burning brick and its preparation method, which is to add alkaline substances, industrial waste residue, water glass and solvents to solidify waste incineration fly ash according to the principle of geopolymerization, and make the obtained solidified body into a non-burning brick, although the In this way, burning-free bricks are made from solidified waste incineration fly ash, which realizes resource utilization to a certain extent. However, due to the further implementation of strict environmental protection policies, the burning-free bricks prepared by solidifying waste Secondary pollution risks and other issues are not allowed for practical application, and this technical solution mainly focuses on the solidification of heavy metal components in waste incineration fly ash, and does not pay attention to the solidification and removal of polluting components such as dioxin and chlorine. In addition to processing
[0005] It can be seen that the above-mentioned process of harmless disposal of fly ash that cannot truly realize the resource utilization of waste incineration fly ash can no longer meet the demand for disposal of waste incineration fly ash, and it is urgent to propose a new technology different from the above-mentioned disposal process. Solve the problem of harmless disposal and resource utilization of waste incineration fly ash

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Point-to-point directional treatment and utilization method for waste incineration fly ash
  • Point-to-point directional treatment and utilization method for waste incineration fly ash
  • Point-to-point directional treatment and utilization method for waste incineration fly ash

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0099] A method for point-to-point directional disposal and utilization of waste incineration fly ash, the method comprises the following steps:

[0100] S1 solidifies the waste incineration fly ash of the waste incineration plant to form a geopolymer solidified body; S2 makes the geopolymer solidified body into a geopolymer solidified agent The specific implementation steps are as follows:

[0101] S1.1 Take 80% mass percentage of waste incineration fly ash as aggregate, first perform water washing pretreatment and 850-1000 ℃ high temperature pretreatment, the specific steps of pretreatment are: mix water and waste incineration fly ash according to the liquid-solid mass ratio In a ratio of 2:1, the waste incineration fly ash is mixed with water, stirred at a slow speed for 0.5-6 hours, and then dehydrated and dried; then the waste incineration fly ash after pretreatment and drying is washed in a high-temperature furnace at 850-1000 ℃. After heating for 1-4 hours, the pretreat...

Embodiment 2

[0108] A method for point-to-point directional disposal and utilization of waste incineration fly ash, the method comprises the following steps:

[0109] S1 solidifies the waste incineration fly ash of the waste incineration plant to form a geopolymer solidified body; S2 makes the geopolymer solidified body into a geopolymer solidified agent The specific implementation steps are as follows:

[0110] S1.1 Take 70% mass percentage of waste incineration fly ash as aggregate, and firstly carry out water washing pretreatment and high temperature pretreatment at 850-1000℃. The specific steps of pretreatment are: mix water and waste incineration fly ash according to the liquid-solid mass ratio In a ratio of 3:1, the waste incineration fly ash is mixed with water, stirred at a slow speed for 0.5-6 hours, then dehydrated and dried; then in a high temperature furnace, the waste incineration fly ash after pretreatment and drying is washed at 850-1000 ℃. After heating for 1-4 hours, the p...

Embodiment 3

[0117] A method for point-to-point directional disposal and utilization of waste incineration fly ash, the method comprises the following steps:

[0118] S1 solidifies the waste incineration fly ash of the waste incineration plant to form a geopolymer solidified body; S2 makes the geopolymer solidified body into a geopolymer solidified agent The specific implementation steps are as follows:

[0119] S1.1 Take 60% mass percentage of waste incineration fly ash as aggregate, first perform water washing pretreatment and 850-1000 ℃ high temperature pretreatment; the specific steps of pretreatment are: mix water and waste incineration fly ash according to the liquid-solid mass ratio In a ratio of 4:1, the waste incineration fly ash is mixed with water, stirred at a slow speed for 0.5-6 hours, and then dehydrated and dried; then the waste incineration fly ash after pretreatment and drying is washed in a high-temperature furnace at 850-1000 ℃. After heating for 1-4 hours, the pretreat...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to the technical field of harmless treatment and resource utilization of waste incineration fly ash, in particular to a point-to-point directional treatment and utilization method of waste incineration fly ash, which comprises the following steps: curing waste incineration fly ash of a waste incineration plant to form a geopolymer curing body, and preparing the geopolymer curing body into a geopolymer curing agent; according to the method, point-to-point directional treatment and utilization of the waste incineration fly ash are achieved in the waste incineration plant and the waste landfill, pollution components such as heavy metal, dioxin and chlorine in the waste incineration fly ash are effectively solidified and removed, and meanwhile the pollution components such as the heavy metal, the dioxin and the chlorine in the waste incineration fly ash are effectively removed. The geopolymer anti-seepage clay with clay-like performance is prepared through resource utilization of the solidified product, the geopolymer anti-seepage clay can replace clay to serve as a cushion soil material to be used for a protection layer of a refuse heap anti-seepage system of a refuse landfill, and point-to-point directional treatment and resource utilization of the waste incineration fly ash are achieved.

Description

technical field [0001] The invention belongs to the technical field of harmless disposal and resource utilization of waste incineration fly ash, and particularly relates to a point-to-point directional disposal and utilization method of waste incineration fly ash. Background technique [0002] Domestic waste is an inevitable product of human production activities. With the development of the economy and the improvement of residents' living standards, the amount of domestic waste is increasing year by year. At present, the harmless disposal methods of garbage in my country mainly include incineration, sanitary landfill and composting. Although garbage incineration has the advantages of being friendly to land resources and less threats to the atmosphere and groundwater, the waste incineration process will A large amount of waste incineration fly ash is generated. These waste incineration fly ash are enriched in the flue of heavy metals such as lead, mercury and chromium, as wel...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/24B09B3/70B09B3/38B09B101/30
CPCB09B3/00Y02P40/10
Inventor 宋军孔德勇杨月刘喜叶汉峰车彤王炳凯魏东张洪波彭勇韩舒飞杨林王立中刘滨
Owner LIAONING HAITIANGE ENVIRONMENTAL PROTECTION TECH