Experimental Studies of the Effect of Design and Technological Solutions on the Intensification of an Underground Coal Gasification Process
| Autor: | Edgar Caceres Cabana, Roman Dychkovskyi, Vasyl Lozynskyi, Volodymyr Falshtynskyi, Pavlo Saik, Oleg Bazaluk |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Technology
Control and Optimization 0211 other engineering and technologies geology Energy Engineering and Power Technology heat balance 02 engineering and technology 010501 environmental sciences Raw material Combustion 01 natural sciences tightness complex mixtures Underground coal gasification otorhinolaryngologic diseases Coal gasification Coal 021108 energy Electrical and Electronic Engineering Process engineering Engineering (miscellaneous) Gas generator coal gasification rocks coal seam material balance gas 0105 earth and related environmental sciences Bituminous coal Renewable Energy Sustainability and the Environment business.industry geology.rock_type Coal mining technology industry and agriculture Building and Construction Environmental science business Energy (miscellaneous) |
| Zdroj: | Energies; Volume 14; Issue 14; Pages: 4369 Energies, Vol 14, Iss 4369, p 4369 (2021) |
| ISSN: | 1996-1073 |
| DOI: | 10.3390/en14144369 |
| Popis: | This paper represents the results of experimental studies of physical modeling of the underground coal gasification process in terms of implementation of design and technological solutions aimed at intensification of a gasification process of thin coal seams. A series of experimental studies were performed in terms of a stand unit with the provided criteria of similarity to field conditions as well as kinetics of thermochemical processes occurring within a gas generator. Hard coal (high volatile bituminous coal) was selected as the raw material to be gasified, as that coal grade prevails in Ukrainian energy balance since it is represented by rather great reserves. Five blow types were tested during the research (air, air–steam, oxygen–steam, oxygen–enriched, and carbon dioxide and oxygen). As a result, the effect of tightness of a gas generator on the quantitative and qualitative parameters of coal gasification while varying the blow by reagents and changing the pressure in a reaction channel has been identified. Special attention was paid to the design solutions involving blow supply immediately into the combustion face of a gas generator. The experimental results demonstrate maximum efficiency of the applied gas generator design involving flexible pipelines and activator in the reaction channel and a blow direction onto the reaction channel face combined with blow stream reversing which will make it possible to improve caloricity of the generator gas up to 18% (i.e., from 8.4 to 12.8 MJ/m3 depending upon a blow type). Consideration of the obtained results of physical modelling can be used with sufficient accuracy to establish modern enterprises based on the underground coal seam gasification; this will help develop more efficiently the substandard coal reserves to generate heat energy as well as power-producing and chemical raw material. The research conclusions can provide technical reference for developing a new generation of underground coal gasification technology. |
| Databáze: | OpenAIRE |
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