Temat: heating coal - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Tests of new method of monitoring endogenous fire hazard in hard coal mines
Autorzy:: Kordos, Jacek
Powiązania:: https://bibliotekanauki.pl/articles/1839013.pdf
Data publikacji:: 2019
Wydawca:: Główny Instytut Górnictwa
Tematy:: hard coal mine
endogenous fire
monitoring system
risk analysis
coal self-heating
kopalnia węgla kamiennego
pożar endogeniczny
system monitorujący
ocena ryzyka
samozagrzewanie się węgla
Opis:: The aim of the article is to present a novel, innovative method of monitoring endogenous fire hazard in hard coal mines, based on a system of temperature sensors placed within solid coal. The developed system of monitoring the level of endogenous fire hazard was tested in an active hard coal mine in Poland. The scope and the method of temperature measurements with downhole temperature sensors in solid coal were presented in detail. Results of systematic temperature monitoring fire prevention activities are presented.
Źródło:: Journal of Sustainable Mining; 2019, 18, 3; 134-141
2300-1364
2300-3960
Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Equilibrium simulations of coal gasification – factors affecting syngas composition
Autorzy:: Żogała, A.
Powiązania:: https://bibliotekanauki.pl/articles/92028.pdf
Data publikacji:: 2014
Wydawca:: Główny Instytut Górnictwa
Tematy:: coal gasification
equilibrium
syngas
heating value
zgazowanie węgla
równowaga
gaz syntezowy
wartość opałowa
Opis:: Purpose: Coal gasification is complex technology, which results depend on many variables, connected among others with fuel, the converting agent and the process itself. The paper aims to analyze, by means of simulations, the influence of the following factors – temperature, pressure, characteristic parameters of coal and gasifying agent, on the composition and heating value of the obtained syngas. The other aim of this paper is the determination of gasification efficiency (based on the definition of cold gas efficiency) for various process conditions. Methods: Computer simulations were used as the research method for the work presented. An equilibrium model, based on the stoi-chiometric method with four independent reactions, was formulated and used in this paper. This model was implemented in Mathematica software. The influence of temperature (in a range from 500 to 1500°C), pressure (changed from atmospheric to 35 atm), three types of gasifying agent (mixtures of air, pure oxygen and steam) and the composition of four Polish coals (lignite and three hard-coals) on syngas parameters were analyzed in this paper. Results: Concentrations of CO2, CO, CH4, H2O, H2, N2 in the equilibrium syngas, for the chosen temperature, pressure and parame-ters of the fuel and converting agent were the results of the simulations carried out. Subsequently, the lower heating value and process efficiency for each syngas composition was calculated. Practical implications: The simulations indicated the thermodynamic limits of gasification and allowed for the formulation of the general principles ruling this process. Results presented in this paper may be useful in the preliminary optimization and analysis of coal gasification. They also can be a point of reference for more advanced simulations. Originality/ value: This paper presents own results obtained from equilibrium simulations of coal gasification. The author implemented a mathematical model, based on the method of Deringer and Traustel, presented earlier in literature, to carry out the calculations.
Źródło:: Journal of Sustainable Mining; 2014, 13, 2; 30-38
2300-1364
2300-3960
Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

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