Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Fly ash high-efficiency single-stage water washing method and harmless treatment process

A harmless treatment and fly ash technology, applied in the field of fly ash treatment, can solve the problems of large investment and operating costs, many equipment and treatment pools, and low washing efficiency, and achieve low investment costs, high washing efficiency, and low occupation small space effect

Pending Publication Date: 2021-03-12
宝武集团环境资源科技有限公司
View PDF10 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above technical scheme adopts two-stage or even multi-stage water washing process. Although the chloride ions in the incineration fly ash can be effectively removed, the washing process is cumbersome and the washing efficiency is low, and the equipment and treatment pool used in the washing process Large area, large investment and operating costs

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
  • Fly ash high-efficiency single-stage water washing method and harmless treatment process
  • Fly ash high-efficiency single-stage water washing method and harmless treatment process
  • Fly ash high-efficiency single-stage water washing method and harmless treatment process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] The fly ash in this embodiment is selected from the incineration fly ash produced by a waste incineration power plant, and its composition and content are as shown in Example 1 in Table 1;

[0063] The fly ash harmless treatment process in the present embodiment comprises the following steps:

[0064] (A) Single-stage water washing and filtration of fly ash:

[0065] For pretreatment, fly ash and industrial desalted water are added into the mixing tank at a mass ratio of 1:2.5-4.5 and stirred for 15 minutes. Adjust the pH to 7-9;

[0066] Washing and filtering, the prepared fly ash solution is simultaneously subjected to single-stage water washing and single-stage solid-liquid separation to obtain solid phase and filtrate; in the single-stage washing process, the mass ratio of water consumption to original fly ash is 1-2.5 : 1, the control washing time is 1~2.5h; It is known that chloride ion content is 0.5~1wt% in the solid phase thing through testing; The compositio...

Embodiment 2

[0072] The fly ash in this embodiment is selected from the dedusting ash produced by a sintering machine in a steel factory, and its composition and content are as shown in Example 2 in Table 1;

[0073] The fly ash harmless treatment process in the present embodiment comprises the following steps:

[0074] (A) Single-stage water washing and filtration of fly ash:

[0075] For pretreatment, fly ash and industrial desalinated water are added into the mixing tank at a mass ratio of 1:2.5-4.5 and stirred for 10 minutes, and after mixing evenly, a fly ash solution with a solid content of 15-35wt% is obtained; the industrial desalinated water is mixed with hydrochloric acid Adjust the pH to 7-9;

[0076] Wash and filter with water, and carry out single-stage water washing and single-stage solid-liquid separation of the prepared fly ash solution synchronously to obtain solid phase and filtrate; in the single-stage water washing process, the mass ratio of water consumption to origin...

Embodiment 3

[0082] The fly ash in this embodiment is selected from the incineration fly ash produced by a waste incineration power plant, and its composition and content are as shown in Example 3 in Table 1;

[0083] The fly ash harmless treatment process in the present embodiment comprises the following steps:

[0084] (A) Single-stage water washing and filtration of fly ash:

[0085] For pretreatment, fly ash and industrial desalinated water are added to the mixing tank at a mass ratio of 1:2.5-4.5 and stirred for 30 minutes, and after mixing evenly, a fly ash solution with a solid content of 15-35wt% is obtained; the industrial desalinated water is mixed with hydrochloric acid Adjust the pH to 7-9;

[0086] Water washing and filtration, the above prepared fly ash solution is simultaneously subjected to single-stage water washing and single-stage solid-liquid separation to obtain solid phase and filtrate; in the single-stage water washing process, the mass ratio of water consumption to...

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 discloses a fly ash high-efficiency single-stage water washing method and a harmless treatment process. The fly ash high-efficiency single-stage water washing method comprises the following steps that pretreatment is conducted, wherein fly ash is mixed with water or acid or alkali to prepare a fly ash solution with the solid content being 1-35 wt%; water washing and filtering are conducted, wherein the fly ash solution is subjected to single-stage water washing and single-stage solid-liquid separation to obtain a solid-phase substance with the chloride ion content being less than1wt% and a filtrate; and the single-stage water washing process and the single-stage solid-liquid separation process are synchronously conducted. In the fly ash harmless treatment process, the solid-phase substance obtained in the fly ash high-efficiency single-stage water washing method can be used as an additive of a building material raw material for standby application after being dried, thefiltrate obtained in the fly ash high-efficiency single-stage water washing method contains a large number of soluble salt ions and can be used as a raw material for preparing industrial salt, and therefore harmless treatment of fly ash is achieved; and in the fly ash high-efficiency single-stage water washing method, water washing in a slurrying tank and solid-liquid separation do not need to berepeatedly conducted, the whole technological process is simple, consumed time is short, and the water washing efficiency is high.

Description

technical field [0001] The invention relates to a fly ash treatment method, in particular to a fly ash high-efficiency single-stage water washing method and a harmless treatment process. Background technique [0002] With the sustained and rapid development of the domestic economy and the rapid improvement of national living standards, the annual output of municipal solid waste has also increased significantly; one of the important means of municipal solid waste disposal at this stage is to use waste incineration to generate electricity through high-temperature incineration of municipal solid waste , can effectively sterilize, reduce volume, and reduce volume. At the same time, it can provide a large amount of heat energy for heating or power generation, and can recover energy to the maximum extent. However, the incineration fly ash produced during the waste incineration process is rich in organic pollutants such as heavy metals and soluble salts. Hazardous waste, if not han...

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): B09B3/00B09B5/00
CPCB09B5/00B09B2101/30B09B3/80
Inventor 卢四平钟伟许澧鸣王翔徐莉季玉玄赵倩倩朱诚金芳李文陈在根
Owner 宝武集团环境资源科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com