ACTIVATION OF UNDERGROUND COAL GASIFICATION WITH THE CONSIDERATION OF THE MODE OF THE UNDERGROUND GAS GENERATOR

2020 ◽  
Author(s):  
V Falshtynskyi ◽  
M Lozynska ◽  
D Lozynska
Keyword(s):  
Coal Gasification ◽  
Underground Coal Gasification ◽  
Gas Generator

Conditions of Suitability of Coal Seams for Underground Coal Gasification

2020 ◽  
Vol 844 ◽  
pp. 38-48
Author(s):  
Gennadiy Pivnyak ◽  
Volodymyr Falshtynskyi ◽  
Roman Dychkovskyi ◽  
Pavlo Saik ◽  
Vasyl Lozynskyi ◽  
...  
Keyword(s):  
Coal Gasification ◽  
Mining Area ◽  
Underground Coal Gasification ◽  
Technical Documentation ◽  
Gas Generator ◽  
Coal Seams ◽  
Experimental Development ◽  
Coal Mining Area ◽  
Underground Gasification ◽  
National University

Results of evaluating the suitability of certain sections of Western Donbas coal seams, based predominately on properties of coal material, for their further experimental development by means of underground gasification method are represented. Criteria to evaluate both expediency of underground gasification and specific conditions of that process are substantiated basing upon the methodology developed at the National Mining University (Dnipro, Ukraine) together with representatives from National University of Saint Augustine (Arequipa, Peru). The methodology has been industrially approved with the confirmation of its efficiency while developing technical documentation for underground gasification projects: “Project of experimental section of Pidzemgaz station of Pavlogradvuhillia association”, “Feasibility study of the expediency of the construction of Pidzemgaz station” FS 3858-PZ”, Synelnykovo deposit; “Project on experimental underground gas generator”, Monastyryshche deposit, FS of experimental module of UCG station of Solenovske coal-mining area, Donbas. Also, they contain the researches, which were conducted within the project GP – 489, financed by Ministry of Education and Science of Ukraine.

scholarly journals Studying the features of the implementation of underground coal gasification technology in terms of Lvivvuhillia SE

2020 ◽  
Vol 168 ◽  
pp. 00036
Author(s):  
Pavlo Saik ◽  
Roman Dychkovskyi ◽  
Vasyl Lozynskyi ◽  
Volodymyr Falshtynskyi ◽  
Edgar Cabana ◽  
...  
Keyword(s):  
Coal Gasification ◽  
Coal Extraction ◽  
Underground Coal Gasification ◽  
Gas Generator ◽  
Mining Operations ◽  
Extraction Technology ◽  
Gas Combustion ◽  
Current State ◽  
Coal Reserves ◽  
Gasification Technology

Topical issues of the possibilities for changes in the coal extraction technology in terms of Stepova mine of Lvivvuhillia SE have been highlighted. Analysis of the current state of mining operations has been carried out. Design solutions as for introduction of the coal gasification technology in the life cycle of the mining enterprise has been proposed on the basis of the analytical, experimental, and industrial studies; the technology has been described. Percentage ratio of the output of combustion generator gases (Н2, СО, СН4) has been identified; gas combustion value and efficiency of the process depending on certain changes in the blowing mixture composition supplied into the underground gas generator have been determined. Heat balance of the process of underground coal gasification has been studied making it possible to evaluate its energy balance. The algorithm to determine coal reserves in a mine pillar to be gasified has been proposed. Indices of the output of combustion generator gases from the gasification column have been defined. The relevant issues have been studied of ensuring the possibility of underground coal gasification technology when uncovering the mining extracted area for the underground gas generator operation.

scholarly journals Analyzing the parameters influencing the efficiency of undereground coal gasification

2018 ◽  
Vol 27 (2) ◽  
pp. 332-336 ◽  
Author(s):  
I. Sadovenko ◽  
O. Inkin ◽  
N. Dereviahina ◽  
Y. Hriplivec
Keyword(s):  
Coal Gasification ◽  
Static Pressure ◽  
Environmental Safety ◽  
Theory And Practice ◽  
Heat Output ◽  
Underground Coal Gasification ◽  
Gas Generator ◽  
Gasification Process ◽  
Negative Effect ◽  
Gas Loss

Relying upon the theory and practice of Podzemgaz stations operation, the paper has analyzed the basic factors working on the efficiency of underground coal gasification;  moreover, it has estimated their function in the formation of gas loss from un- derground gas generator. The determined factors have been divided into initial factors and controllable ones according to their process characteristics and degree of their influ- ence of gasification process itself.The data confirm the dependence of the increased pressure upon the increased heat output. Moreo- ver, high static pressure within gas generator prevents from rock roof caving and reaction channel filling up with molten rock. It has been substantiated that almost all disturbing factors have negative effect on gas calorifity whereas parameters of blast rate increase and static pressure growth in a gas generator have the most positive effect among the controlling factors. Aspects concerning the increase in loss of the produced gas that may reduce economic efficiency and environmental safety of underground coal gasification have been considered as well.

scholarly journals OPTIMIZATION OF ENERGY EFFICIENCY OF A HEAT RECUPERATOR ON THE BASIS OF UNDERGROUND COAL GASIFICATION

2021 ◽  
Author(s):  
Volodymyr Falshtynskyi ◽  
◽  
Pavlo Saik ◽  
Roman Dychkovskyi ◽  
Vasyl Lozynskyi ◽  
...  
Keyword(s):  
Thermal Energy ◽  
Coal Gasification ◽  
Coal Mines ◽  
Energy Generation ◽  
Field Studies ◽  
Underground Coal Gasification ◽  
Gas Generator ◽  
Environmental Friendliness ◽  
Heat Recuperator ◽  
Gasification Products

Mining of the off-balanced and balanced reserves of mines, being under closure or completing their operation, required the implementation of mobile, complex, and environmentally friendly development technologies based on the processes of well underground coal gasification (WUCG) that unites mining of coal and its energy-chemical use. Environmental friendliness of the WUCG process is possible due to its controllability, hermeticity of the underground gas generator, and complex use of cogeneration technologies in the closed cycle of purification and processing of gasification products. The set engineering tasks were performed using analytical studies, bench studies and field studies. Efficiency of thermal energy generation were studies using rocks enclosing the underground gasifier and generator gases. These sources being the basic heat generating segments of energy chemical complex for coal gasification being formed at the territories of operating coal mines or mines at the stage of their closure. Prospects of coal gasification and thermal energy generation using rock disposals of coal mines have been estimated.

Mathematical and Geomechanical Model in Physical and Chemical Processes of Underground Coal Gasification

2018 ◽  
Vol 277 ◽  
pp. 1-16 ◽  
Author(s):  
Gennadiy Pivnyak ◽  
Roman Dychkovskyi ◽  
Oleksandr Bobyliov ◽  
Edgar Cáceres Cabana ◽  
Adam Smoliński
Keyword(s):  
Coal Gasification ◽  
The Body ◽  
Ministry Of Education ◽  
Underground Coal Gasification ◽  
Gas Generator ◽  
Geomechanical Model ◽  
Waste Products ◽  
Gasification Process ◽  
Geological Conditions ◽  
Scientific Principles

The formation of the stress-strain state of rocks in the several phase gasification processes was considered. Proceeding from the well-known principles of thermodynamics and phase formation of the multi-type rockmass under the influence of the temperature field, a geomechanical model of a two-layer artificially-formed shell formed during the gasification process by the method of variation feeding of the blowing mixture to the body of the gas generator was developed. The Neumann principle is used for the magnitude determination of the maximum stress vector, which involves the definition of the axial tensor of mechanical deformations through the anisotropy of the thermal expansion (the polar tensor of the second rank). This makes the possibility to create the base for a package of information programs creation. Such programs give the possibility to simplify the study of the rockmass deformation characteristics and to evaluate the stresses in a thermally changing environment. Researches are carried out by creating the final element system with the adaptation to the specific mining-geological conditions. These approaches are checked both for working out the coal reserves and for utilization of the mining waste products. Results of this investigation were included to the Roman Dychkovskyi thesis of the scientific degree of the Doctor of the Technique Sciences “Scientific Principles of Technologies Combination for Coal Mining in Weakly Metamorphoses Rockmass”. They contain the researches, which were conducted within the project GP – 489, financed by Ministry of Education and Science of Ukraine.

Cold Flow Simulation in Underground Coal Gasification (UCG) Cavities

2014 ◽  
Vol 1 (1) ◽  
pp. 15-24 ◽  
Author(s):  
Dipankar Chatterjee ◽  
◽  
Satish Gupta ◽  
Chebolu Aravind ◽  
Rakesh Roshan
Keyword(s):  
Coal Gasification ◽  
Flow Simulation ◽  
Underground Coal Gasification ◽  
Cold Flow

scholarly journals Changes in properties of tar obtained during underground coal gasification process

2021 ◽  
Author(s):  
Marian Wiatowski ◽  
Roksana Muzyka ◽  
Krzysztof Kapusta ◽  
Maciej Chrubasik
Keyword(s):  
Coal Gasification ◽  
Coal Tar ◽  
Liquid Product ◽  
Coke Oven ◽  
Underground Coal Gasification ◽  
Gasification Process ◽  
Dominant Component ◽  
Process Gas ◽  
High Volatility ◽  
Product Separator

AbstractIn this study, the composition of tars collected during a six-day underground coal gasification (UCG) test at the experimental mine ‘Barbara’ in Poland in 2013 was examined. During the test, tar samples were taken every day from the liquid product separator and analysed by the methods used for testing properties of typical coke oven (coal) tar. The obtained results were compared with each other and with the data for coal tar. As gasification progressed, a decreasing trend in the water content and an increasing trend in the ash content were observed. The tars tested were characterized by large changes in the residue after coking and content of parts insoluble in toluene and by smaller fluctuations in the content of parts insoluble in quinoline. All tested samples were characterized by very high distillation losses, while for samples starting from the third day of gasification, a clear decrease in losses was visible. A chromatographic analysis showed that there were no major differences in composition between the tested tars and that none of the tar had a dominant component such as naphthalene in coal tar. The content of polycyclic aromatic hydrocarbons (PAHs) in UCG tars is several times lower than that in coal tar. No light monoaromatic hydrocarbons (benzene, toluene, ethylbenzene and xylenes—BTEX) were found in the analysed tars, which results from the fact that these compounds, due to their high volatility, did not separate from the process gas in the liquid product separator.

Sign in / Sign up

Export Citation Format

Share Document