Waste incineration power generation fly ash solidification method

A fly ash solidification and waste incineration technology, which is applied in the direction of solid waste removal, etc., can solve the problems of low long-term solidification stability, large volume increase of solidified body, and poor stability of solidified body, so as to improve strength and reduce Effect of leaching and improving binding force

Active Publication Date: 2021-09-17
HEFEI UNIV
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to maintain high strength and long-term stability of the solidified body, the amount of cement required for cement solidification is very high, resulting in a large increase in the volume of the solidified body formed after curing treatment, increasing the demand for the capacity

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
  • Waste incineration power generation fly ash solidification method

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0020] Example 1

[0021] A rubbish incineration power generation fly ash curing method, including the following steps:

[0022] S1, after mixing the fly ash, the phosphorus powder with the hydrolyzate of the epoxy group-containing silane coupling agent, allowed to react, dry, to obtain fly ash premix;

[0023] S2, after mixing the fly gray premix with the aqueous solution of the gelatin, heating the stirring reaction, dried to give a fly ash mixture;

[0024] After S3, the fly ash mixture is mixed with cement, and the appropriate amount of water is mixed is evenly mixed, and the curing is placed in the mold to form a cured body.

Example Embodiment

[0025] Example 2

[0026] A rubbish incineration power generation fly ash curing method, including the following steps:

[0027] S1, 0.1 kg of silane coupling agent KH-560, 0.8 kg of ethanol, 0.3 kg of water, stirred and uniform, allowed to stand for 1 h, to obtain a hydrolyzate of the silane coupling agent KH-560, 10kg flying gray, 1.5kg phosphate ore After mixing with the hydrolyzate of the silane coupling agent KH-560 prepared described above, the reaction was allowed to stand for 1 h, dried at 60 ° C to give a fly ash premix;

[0028] S2, dissolve 0.1 kg gelatin in water to give a solution of gelatin having a concentration of 10 g / L, and then mixed the fly gray premix with the aqueous solution of the above-described gelatin, heated at 60 ° C, stirring the reaction for 4h, Dry at 60 ° C to give a fly ash mixture;

[0029] S3, after mixing the fly ash mixture with the cement, the weight ratio is 3: 7, and the appropriate amount of water is mixed, and the mold is placed in the ...

Example Embodiment

[0030] Example 3

[0031] A rubbish incineration power generation fly ash curing method, including the following steps:

[0032] S1, 0.2 kg of silane coupling agent KH-560, 2.4 kg of ethanol, 1.2 kg of water, stirred and uniform, stand for 2 h, to obtain a hydrolyzate of the silane coupling agent KH-560, 10 kg flying gray, 2.5kg phosphate ore When the powder was mixed with the hydrolyzed liquid obtained by the above-mentioned silane coupling agent KH-560, the reaction was allowed to react 2 h, dried at 80 ° C to give a fly ash premix;

[0033] S2, 0.2 kg gelatin was dissolved in water to give a solution of gelatin having a concentration of 20 g / L, and then the fly gray premix was mixed with the aqueous solution of the above-described gelatin, and the reaction was heated at 80 ° C for 2 h, Dry at 80 ° C to give a fly ash mixture;

[0034] S3, after mixing the fly ash mixture with the cement is mixed with a weight ratio of 6: 4, and the appropriate amount of water is mixed well, a...

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

PropertyMeasurementUnit
Compressive strengthaaaaaaaaaa
Login to view more

Abstract

The invention discloses a waste incineration power generation fly ash solidification method which comprises the following steps: S1, mixing fly ash, ground phosphate rock and hydrolysate of a silane coupling agent containing an epoxy group, standing for reaction, and drying to obtain a fly ash premix; s2, mixing the fly ash premix with an aqueous solution of gelatin, heating and stirring for reaction, and drying to obtain a fly ash mixture; and S3, mixing the fly ash mixture with cement, adding a proper amount of water, uniformly stirring, and standing and curing in a mold to form a cured body. According to the solidification method, the compressive strength of the fly ash cement solidification body can be improved, the leaching property of heavy metal impurities in the solidification body is reduced, the obtained solidification body can meet the requirement for being used as a building material under the condition that the fly ash is high in mixing amount, efficient, energy-saving and economical recycling of the waste incineration power generation fly ash is facilitated, and the economic benefit is increased. The actual use requirements are met.

Description

technical field [0001] The invention relates to the technical field of waste treatment, in particular to a method for solidifying fly ash for waste incineration power generation. Background technique [0002] With the acceleration of urbanization, the disposal of a large amount of domestic waste generated by urban life has become an important issue. Waste incineration power generation is a technology that incinerates solid waste and then generates electricity through steam generators. It can not only process municipal solid waste, but also recover energy from waste, and has been widely used. However, waste incineration power generation will produce a large amount of fly ash, which contains heavy metal pollutants such as Pb and Cr. These heavy metals are often attached to the fly ash in soluble form, which poses a major threat to the environment. Therefore, it is necessary to solidify the incineration fly ash before landfilling it. [0003] Cement solidification is a method...

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
IPC IPC(8): C04B28/02B09B3/00
CPCC04B28/02C04B2201/50C04B2111/00017C04B18/08C04B18/12C04B24/42C04B24/38C04B24/026Y02W30/91
Inventor 朱仁发
Owner HEFEI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap