从生物质燃烧中精确测量颗粒物排放量:对全流和部分流稀释系统的整体评估
Jordi F P Cornette1, Igor V Dyakov2, Julien Blondeau1
1Thermo and Fluid Dynamics (FLOW), Vrije Universiteit Brussel (VUB), Brussels, 1050, Belgium; Brussels Institute for Thermal-fluid Systems and clean Energy (BRITE), Vrije Universiteit Brussel (VUB) and Université Libre de Bruxelles (ULB), Belgium.
Environmental research
|July 23, 2023
概括
精确测量生物质燃烧颗粒物至关重要. 两级部分流量稀释系统 (PTD + ED) 的颗粒损失比全流量稀释 (FFD) 道少,为排放控制提供了更可靠的数据.
科学领域:
- 环境科学 环境科学
- 燃烧工程 燃烧工程
- 大气化学 大气化学
背景情况:
- 准确测量来自生物质燃烧的颗粒物 (PM) 排放对于环境和健康评估至关重要.
- 严格的空气质量标准需要可靠和精确的颗粒物测量方法.
- 评价燃烧设备和烟气净化系统的性能依赖于准确的排放数据.
研究的目的:
- 综合评估两个颗粒物稀释系统:一个全流稀释 (FFD) 道和一个两级部分流稀释系统 (PTD + ED).
- 用这些稀释系统来描述使用木质颗粒炉的颗粒数量大小分布.
- 确定每个系统的优点和局限性,以准确测量生物质燃烧排放.
主要方法:
- 全流稀释 (FFD) 道和两级部分流稀释系统 (有孔管稀释器+喷射器稀释器,PTD+ED) 的比较.
- 从木质颗粒炉中测量颗粒数量尺寸分布.
- 分析采样错误,颗粒损失以及稀释比率 (DR) 和温度对测量的影响.
主要成果:
- 在PTD+ED系统测量总颗粒数度比FFD系统高35%,表明FFD中的颗粒损失很大.
- 由于非异动力学采样而导致的采样错误在两种系统的颗粒<1μm时小于1%.
- 凝固影响了两种系统中的颗粒分布,在较低的稀释比率下,影响更为明显.
结论:
- 两级部分流量稀释系统 (PTD + ED) 更适合准确测量生物质燃烧中的颗粒数度,因为与FFD相比,颗粒损失较低.
- 了解稀释系统的局限性,如颗粒损失和凝结,对于开发可靠的测量方法至关重要.
- 这项研究支持对生物质燃烧排放量进行改进的测量技术的开发,有助于有效的污染控制战略.
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