Study of Laser Energy in Multi-Element Detection of Pulverized Coal Flow with Laser-Induced Breakdown Spectroscopy

被引：4

作者：

Zheng Jian-ping ^{[1
]}

Lu Ji-dong ^{[1
]}

Zhang Bo ^{[1
]}

Chen Shi-he ^{[2
]}

Yao Shun-chun ^{[1
]}

Pan Feng-ping ^{[2
]}

Dong Xuan ^{[1
]}

Zhang Xi ^{[2
]}

机构：

[1] S China Univ Technol, Sch Elect Power, Guangzhou 510640, Peoples R China

[2] Guangdong Power Grid Co Ltd, Elect Power Res Inst, Guangzhou 510080, Guangdong, Peoples R China

来源：

SPECTROSCOPY AND SPECTRAL ANALYSIS | 2014年 / 34卷 / 01期

关键词：

Laser energy; Pulverized coal flow; Laser-induced breakdown spectroscopy; Plasma; EMISSION-SPECTROSCOPY; ABLATION;

D O I：

10.3964/j.issn.1000-0593(2014)01-0221-05

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

The logical range of laser power density and optimum laser power density were explored for multi-element analysis of pulverized coal flow with laser-induced breakdown spectroscopy in the present paper. The range of laser energy was chosen from 20 to 160 mJ in the experiment. Pulverized coal less than 200 mu m in diameter of particles fell freely through feeder outlet and the rate of flow was controlled by screw feeder. Emissions were collected with pulse laser at 1 064 nrn focusing on pulverized coal flow and plasma was generated. The intensity and cause of fluctuation of emission spectra at various laser energy levels were studied. A suitable range of laser power density is from 14. 4 to 34. 4 GW . cm(-2), and the optimum laser power density is 19. 5 GW . cm(-2) for the determination of pulverized coal flow with LIBS.

引用

页码：221 / 225

页数：5

共 15 条

[1] Plasma shielding effect in laser ablation of metallic samples and its influence on LIES analysis
Aguilera, JA
Aragon, C
Penalba, F
[J]. APPLIED SURFACE SCIENCE, 1998, 127 : 309 - 314
[2] [Anonymous], HDB LASER INDUCED BR
[3] [董美蓉 Dong Meirong], 2012, [工程热物理学报, Journal of Engineering Thermophysics], V33, P175
[4] Laser-induced breakdown spectroscopy for on-line sulfur analyses of minerals in ambient conditions
Gaft, M.
Nagli, L.
Fasaki, I.
Kompitsas, M.
Wilsch, G.
[J]. SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY, 2009, 64 (10) : 1098 - 1104
[5] Gaft M, 2008, SPECTROCHIM ACTA B, V57, P1
[6] The correlation between ion production and emission intensity in the laser-induced breakdown spectroscopy of liquid droplets
Huang, JS
Ke, CB
Huang, LS
Lin, KC
[J]. SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY, 2002, 57 (01) : 35 - 48
[7] Ambient measurements of metal-containing PM2.5 in an urban environment using laser-induced breakdown spectroscopy
Lithgow, GA
Robinson, AL
Buckley, SG
[J]. ATMOSPHERIC ENVIRONMENT, 2004, 38 (20) : 3319 - 3328
[8] TEMPERATURE AND EMISSION SPATIAL PROFILES OF LASER-INDUCED PLASMAS DURING ABLATION USING TIME-INTEGRATED EMISSION-SPECTROSCOPY
MAO, XLL
SHANNON, MA
FERNANDEZ, AJ
RUSSO, RE
[J]. APPLIED SPECTROSCOPY, 1995, 49 (07) : 1054 - 1062
[9] Characterization of inorganic species in coal by laser-induced breakdown spectroscopy using UV and IR radiations
Mateo, M. P.
Nicolas, G.
Yanez, A.
[J]. APPLIED SURFACE SCIENCE, 2007, 254 (04) : 868 - 872
[10] Mteo M P, 2007, APPL SURF SCI, P868

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