Distribution characteristics of minor and trace elements in fine particulate matters from a 660 MW coal-fired boiler

WANG Chao; LIU Xiaowei; XU Yishu; WU Jianqun; WANG Jianpei; XU Minghou; LIN Xianmin; LI Haishan; XIA Yongjun

doi:10.3969/j.issn.0438-1157.2013.08.039

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Distribution characteristics of minor and trace elements in fine particulate matters from a 660 MW coal-fired boiler

更新时间：2025-12-10

- Distribution characteristics of minor and trace elements in fine particulate matters from a 660 MW coal-fired boiler
- CIESC Journal Issue 8, Pages: 2975-2981(2013)
- 作者机构：
  
  1. 华中科技大学煤燃烧国家重点实验室,湖北,武汉,430074
  2. 江西省电力科学研究院,江西,南昌,330096
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2013.08.039
  CLC： 513
- Online First：05 August 2013，
  
  Published：05 August 2013
- 稿件说明：
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WANG Chao, LIU Xiaowei, XU Yishu, et al. Distribution characteristics of minor and trace elements in fine particulate matters from a 660 MW coal-fired boiler[J]. CIESC Journal, 2013, (8): 2975-2981.
DOI：

WANG Chao, LIU Xiaowei, XU Yishu, et al. Distribution characteristics of minor and trace elements in fine particulate matters from a 660 MW coal-fired boiler[J]. CIESC Journal, 2013, (8): 2975-2981. DOI： 10.3969/j.issn.0438-1157.2013.08.039.

摘要

应用承重撞击器(DGI)采样系统在南昌某电厂2#锅炉电除尘器前进行颗粒物采集

并同时采集了原煤样和底灰样。对飞灰的质量粒径分布、底灰和飞灰中次量与痕量元素的分布特性进行了分析。结果表明PM1.0和PM2.5质量分别占PM10质量的16.0%~17.4%和46.9%~50.6%;Na、Mg、P、S主要富集在亚微米颗粒物中

Al、Si、Ca、Ti、Fe、K主要富集在超微米颗粒物中;随着颗粒物粒径的减小

As、Cd、Cr、Pb的浓度逐渐增大

且在亚微米颗粒物中的增幅大于超微米颗粒物

Mn在各级颗粒物中浓度相近;As、Cd、Cr、Pb大量富集于亚微米颗粒物之上

Mn在各级颗粒物中富集特性无明显差异

且各痕量元素挥发特性存在以下规律:As>Cd>Cr>Pb>Mn;文中给出了无控制条件下痕量元素的排放因子

PM1.0中各元素排放比例存在以下规律:As>Cd>Cr>Pb>Mn。

Abstract

Sampling system with Dekati Gravimetric Impacter(DGI)was positioned in front of the 2# boiler ESP of a power plant in Nanchang and used to collect PMs

while the samples of raw coal and bottom ash were also taken.The massive particle size distribution of fly ash

the distribution characteristics of minor and trace elements in bottom ash and fly ash were measured and analyzed.The results indicate that the mass of PM1.0 and PM2.5 are 16.0%-17.4% and 46.9%-50.6% respectively.Na

P and S mainly enrich in submicron particles

and Al

Ti and Fe mainly do in supermicron particles. With the decrease of particle size

the concentration of As

Cr and Pb increases

and the growth rate is higher for submicron particles than for supermicron particles

the concentration of Mn in different PM is similar.A large amount of As

Cr and Pb involves in the submicron PM

but Mn has no significant difference for different size PM particles.The volatileness of trace elements is As>Cd>Cr>Pb>Mn

and their emission factors under non-controlled conditions are listed in the paper.For PM1.0

the order of emission ratio of trace elements is the same as volatility

i.e.

As>Cd>Cr>Pb>Mn.

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