Numerical simulation of molten-slag flow in coal gasifier

Maromu Otaka, Hiroaki Watanabe, Saburo Hara

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)


In this paper, numerical simulations of the heat transfer in molten-slag flow with free surface and phase change (solidification) is carried out, and we propose a new evaluation method for discharging performance of the molten-slag from coal gasifier. A stable operation of the coal gasifier requires that the molten-slag should be discharged from the slag-hole continuously. In the maintenance of discharging a molten slag, it is necessary to keep the molten-slag temperature higher than an ash fluid temperature, and to hold the fluidity of the molten-slag. From the viewpoint of gasification performance, if the air ratio is set low in order to raise the cold gas efficiency, the molten-slag is not able to get enough heat for its discharge, because of the lowering of gas temperature in the coal gasifier. To strike a balance between the maintenance of continuity on the molten-slag discharge and the improvement in gasification performance, it is important to develop a prediction and evaluation method for discharge performance of the molten-slag from coal gasifier.

Original languageEnglish
Title of host publicationProceedings of the ASME Power Conference, 2005
Subtitle of host publicationIncludes Papers from the 2005 International Conference on Power Engineering, ICOPE
PublisherAmerican Society of Mechanical Engineers
Number of pages6
ISBN (Print)0791841820, 9780791841822
Publication statusPublished - 2005
Externally publishedYes
Event2005 ASME Power Conference - Chicago, IL, United States
Duration: Apr 5 2005Apr 7 2005

Publication series

NameProceedings of the ASME Power Conference, 2005
VolumePART B


Other2005 ASME Power Conference
Country/TerritoryUnited States
CityChicago, IL

All Science Journal Classification (ASJC) codes

  • General Engineering


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