关于燃烧低热值废弃物与生物质混合的数值模拟研究
Zhengguang Huang1, Dehong Gong1, Changyang Peng2
1School of Electrical Engineering, Guizhou University, Guiyang, Guizhou 550025, China.
ACS omega
|April 1, 2024
概括
在焚烧炉中将生物质与低热量废物混合,会增加炉温度并减少二氧化. 20%的生物质与选择性非催化减排 (SNCR) 的混合物有效地满足NO排放标准.
科学领域:
- 环境工程 环境工程
- 化学工程是化学工程的重要组成部分.
- 燃烧科学 燃烧科学
背景情况:
- 低热量废物焚烧在温度控制和污染物产生方面带来了挑战.
- 研究生物质混合作为提高燃烧效率和减少排放的战略.
研究的目的:
- 以数值评估生物质混合对废物焚烧炉性能的影响.
- 评估对炉温,污染物形成 (NOx,二氧化物) 和选择性非催化降低 (SNCR) 效率的影响.
主要方法:
- 使用流体动态焚烧炉代码和Fluent软件进行数值模拟.
- 分析废物特性 (含水量,热量) 和烟气参数 (温度,停留时间,污染物度).
主要成果:
- 增加生物质混合比率降低了水含量,增加了热量和最大炉温度 (12271408 K).
- 较高的生物质比率增加了NO排放 (579793 mg/Nm3).
- 生物质混合>20%延长了高温烟气停留时间 (>2秒),有效制了二氧化碳的产生.
结论:
- 生物质混合改善了燃烧特性,可以减轻低热量废物焚烧中的二氧化物形成.
- 在最佳的SNCR条件下 (20%生物质,尿素比1.1) 实现了低于250 mg/Nm3的NO输出度.
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