城市固体废物焚烧的补充玻璃化,炉和流体化床焚烧炉的飞灰通过共同减少过程
Wenzhi Qi1, Chao Geng2, Feng Zhu1
1School of Environment, Tsinghua University, Beijing 100084, China.
Waste management (New York, N.Y.)
|May 28, 2024
概括
城市固体废物焚烧飞灰 (FA) 可以通过共同减少炉 (G-FA) 和流体床 (F-FA) 类型安全处理. 这一过程在较低温度下产生玻璃化渣和有价值的铁合金,为环境带来好处.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 城市固体废物焚烧 (MSWI) 产生大量飞 (FA),带来了环境挑战.
- 现有的FA处理方法,如传统的G-FA玻璃化,需要高温.
- 格炉FA (G-FA) 和流化床FA (F-FA) 之间的组成差异表明了协同处理的潜力.
研究的目的:
- 开发一种共同减少的过程,同时治疗G-FA和F-FA.
- 调查从混合FA中生产玻璃化渣和铁合金的情况.
- 为了确定有效和低温FA处理的最佳条件.
主要方法:
- 为了处理G-FA和F-FA的混合物,采用了联合减少过程.
- 玻璃化和合金形成在不同的G-FA:F-FA质量比 (1:9至6:4) 进行了研究.
- 用SiO2-Al2O3-CaO系统的热力学分析来了解化的行为.
主要成果:
- 清洁的玻璃化渣和Fe-Cr-Ni-Cu合金在1300°C成功生产.
- 同降解过程在约300°C的温度下运行,低于传统的G-FA玻璃化.
- 最佳的FA比率将热力学系统转移到温度较低的融区,从烟气中回收Zn,Cd和Pb等挥发性金属.
结论:
- 联合降低G-FA和F-FA是FA治疗的可行和节能方法.
- 这一过程通过生产有价值的材料,使FA的有益再利用成为可能.
- 同减少方法为FA管理提供了显著的环境优势.
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