生活垃圾焚烧飞灰中氯离子洗脱协同二噁英降解的方法
By combining landfill leachate concentrate washing with low-temperature pyrolysis, the dependence of low-temperature pyrolysis technology on an inert atmosphere has been solved, achieving efficient degradation and resource utilization of dioxins in municipal solid waste incineration fly ash.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- GUANGDONG GUANGYE INVESTMENT GRP CO LTD
- Filing Date
- 2025-04-22
- Publication Date
- 2026-07-17
AI Technical Summary
Existing low-temperature pyrolysis technology requires a strictly inert atmosphere to prevent oxygen leakage when degrading dioxins in fly ash from municipal solid waste incineration, resulting in high energy consumption and low efficiency, making it difficult to promote.
The fly ash from municipal solid waste incineration is washed, filtered, and subjected to three-stage countercurrent water washing using leachate concentrate. After adsorbing organic matter, it undergoes low-temperature pyrolysis without the introduction of nitrogen gas. The organic matter in the leachate consumes oxygen, and the oxygen concentration in the low-temperature pyrolysis atmosphere is controlled to be below 1%.
It achieves efficient degradation of dioxins without relying on a nitrogen atmosphere, saving resources and simplifying the process. Furthermore, chloride ions and metals in fly ash can be utilized as resources, with a degradation efficiency of 99.4-99.5%.
Smart Images
Figure CN120094934B_ABST