scholarly journals Influence of Volatile Content on the Explosion Characteristics of Coal Dust

ACS Omega ◽  
2021 ◽  
Author(s):  
Di Sha ◽  
Yucheng Li ◽  
Xihua Zhou ◽  
Jing Zhang ◽  
Huan Zhang ◽  
...  
Keyword(s):  
Coal Dust ◽  
Volatile Content

Effects of methane admixture, particle size and volatile content on the dolomite inerting requirements of coal dust

1991 ◽  
Vol 27 (2) ◽  
pp. 187-203 ◽  
Author(s):  
Paul R. Amyotte ◽  
Kenneth J. Mintz ◽  
Michael J. Pegg ◽  
Yu-Hong Sun ◽  
Kenneth I. Wilkie
Keyword(s):  
Particle Size ◽  
Coal Dust ◽  
Volatile Content ◽  
Admixture Particle

scholarly journals Experimental Study on the Ignition Sensitivity and Explosion Severity of Different Ranks of Coal Dust

2019 ◽  
Vol 2019 ◽  
pp. 1-11 ◽  
Author(s):  
Junfeng Wang ◽  
Xiangbao Meng ◽  
Yansong Zhang ◽  
Haiyan Chen ◽  
Bo Liu
Keyword(s):  
Experimental Study ◽  
Coal Dust ◽  
Dust Cloud ◽  
Sem Analysis ◽  
Volatile Content ◽  
Microstructure Changes ◽  
Before And After

This study is conducted to examine the ignition sensitivity and explosion severity differences among different ranks of coal dust and reveal the causes underlying these differences. A G–G furnace, a Hartmann tube, and a 20 L explosion tank are used to test MIT, MIE, Pmax, (dp/dt)max, and other parameters of three different ranks of coal dust. SEM analysis is carried out on the coal dust before and after explosion to compare and trace their microstructure changes. The results indicate that the lower the rank of the coal, the more likely the dust cloud to be ignited, the faster the explosion flame propagated, and the greater the explosion severity. The main drivers behind the ignition sensitivity and explosion severity differences among different ranks of coal dust are the volatile content and pyrolytic property of the coal.

scholarly journals Experimental Investigations of the Ignitability of Several Coal Dust Qualities

Energies ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 6323
Author(s):  
Reyhane Youssefi ◽  
Tom Segers ◽  
Frederik Norman ◽  
Jörg Maier ◽  
Günter Scheffknecht
Keyword(s):  
Moisture Content ◽  
Coal Dust ◽  
Characteristic Number ◽  
Ash Content ◽  
Hard Coal ◽  
Volatile Content ◽  
Explosion Pressure ◽  
Maximum Explosion Pressure ◽  
Deflagration Index ◽  
Ignition Characteristics

The ignition characteristics of coal dust is of high importance for the flame stability in coal-fired power plants. We investigate the ignitability of six lignite dust qualities and one hard coal using dust explosion tests and an ignitability characteristic number. The paper aims to identify the degree of impact of the properties of coals, such as the moisture content, the ash content etc., on the ignition characteristics and ultimately to compare the identified relevant ignition parameters to the ignition performance of the dust qualities in an industrially relevant environment. The minimum cloud ignition temperature (MCIT), the maximum rate of pressure rise ((dp/dt)max), the maximum explosion pressure (pmax), the deflagration index (Kst-value) and the modified ignitability characteristic number (ZWZmod.) were determined and were attributed to the moisture content, the ash content and the median particle size. The MCIT was largely influenced by the volatile content, whereas the variations of moisture and ash contents within the range of 10% to 20% did not have a significant impact on the MCIT. The maximum explosion pressure did not differ considerably and stayed in a narrow range among the tested dust qualities. The deflagration index showed a higher sensitivity to the dust properties. The deflagration index and the modified ignitability characteristics number dropped as the moisture content increased and the volatile content reduced. The Kst and ZWZmod. values showed the highest susceptibility to the coal dust properties. Hence, they were used as representative parameters for further comparison with the ignition performance of coal dust in a pilot-scale testing. The results showed that both parameters predicted the ignition performance relatively well and can be used as indicators for the prediction of the ignition performance.

STRUCTURAL CHARACTERIZATION AND IN VITRO CYTOTOXIC POTENTIAL OF COAL DUST IN A ROMANIAN POWER PLANT

2010 ◽  
Vol 9 (9) ◽  
pp. 1297-1304
Author(s):  
Alice Raducanu ◽  
Aurica Suvergel ◽  
George Darie ◽  
Ileana Rau ◽  
Constantin Grigoriu ◽  
...  
Keyword(s):  
Power Plant ◽  
Structural Characterization ◽  
Coal Dust ◽  
Cytotoxic Potential

Features of antibodies against benzo[a]pyrene formation in workers of coal mines and thermal power plants

2019 ◽  
pp. 9-14
Author(s):  
Ye. G. Polenok ◽  
S. A. Mun ◽  
L. A. Gordeeva ◽  
A. A. Glushkov ◽  
M. V. Kostyanko ◽  
...  
Keyword(s):  
Power Plant ◽  
Thermal Power Plant ◽  
Power Plants ◽  
Reference Group ◽  
Coal Dust ◽  
Thermal Power ◽  
Coal Mines ◽  
Serum Levels ◽  
Thermal Power Plants ◽  
Immune Reactions

Introduction.Coal dust and coal fi ring products contain large amounts of carcinogenic chemicals (specifically benz[a]pyrene) that are different in influence on workers of coal mines and thermal power plants. Specific immune reactions to benz[a]pyrene therefore in these categories of workers can have specific features.Objective.To reveal features of antibodies specifi c to benz[a]pyrene formation in workers of coal mines and thermal power plants.Materials and methods.The study covered A and G class antibodies against benz[a]pyrene (IgA-Bp and IgG-Bp) in serum of 705 males: 213 donors of Kemerovo blood transfusion center (group 1, reference); 293 miners(group 2) and 199 thermal power plant workers (group 3). Benz[a]pyrene conjugate with bovine serum albumin as an adsorbed antigen was subjected to immune-enzyme assay.Results.IgA-Bp levels in the miners (Me = 2.7) did not differ from those in the reference group (Me = 2.9), but in the thermal power plant workers (Me = 3.7) were reliably higher than those in healthy men and in the miners (p<0.0001). Levels of IgG-Bp in the miners (Me = 5.0) appeared to be lower than those in the reference group (Me = 6.4; (p = 0.05). IgG-Bb level in the thermal power plantworkers (Me = 7.4) exceeded the parameters in the healthy donors and the miners (p<0.0001). Non-industrial factors (age and smoking) appeared tohave no influence on specific immune reactions against benz[a]pyrene in the miners and the thermal power plant workers.Conclusions.Specific immune reactions against benz[a]pyrene in the miners and the thermal power plant workers are characterized by peculiarities: the miners demonstrate lower levels of class A serum antibodies to benz[a]pyrene; the thermal power plant workers present increased serum levels of class G antibodies to benz[a]pyrene. These peculiarities result from only the occupational features, but do not depend on such factors as age, smoking and length of service at hazardous production. It is expedient to study specific immune reactions to benz[a]pyrene in workers of coal mines and thermal power plants, to evaluate individual oncologic risk and if malignancies occur.

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