一种生活垃圾焚烧飞灰中硒的固化药剂和方法
By using the chemical reaction of components such as sodium metabisulfite, sodium dithiocarbonate and ferrous salts, a precipitate that is insoluble in water is generated, which solves the problem of selenium solidification in fly ash from municipal solid waste incineration, achieving a high-efficiency and low-cost selenium solidification effect, and is suitable for industrial applications.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HUNAN ZHONGXIANG SPRING ENVIRONMENTAL PROTECTION TECH CO LTD
- Filing Date
- 2023-12-29
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies for treating selenium in fly ash from municipal solid waste incineration suffer from poor applicability, high cost, complex operation, and low efficiency, making it difficult to meet the needs of large-scale industrial applications.
Sodium metabisulfite and sodium dithiocarbonate are used as component A, and ferrous salt and polyacrylamide are used as components B as selenium-fixing agents. Through chemical reaction, precipitates such as calcium selenite and calcium sulfate, which are insoluble in water, are generated, reducing the environmental migration activity of selenium. Polyacrylamide is used to agglomerate the precipitates, thereby achieving the selenium fixation effect.
It enables flexible adjustment for different selenium concentrations, is low in cost and simple to operate, and has a selenium fixation rate of up to 92.1%, meeting landfill standards and suitable for industrial-scale production.
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