scholarly journals Study on the Predicting Technique of Ash Deposition Tendency in the Entrained-Flow Coal Gasifier. 2nd Report. The Analytical Results of Ash Deposition Tendency in a 2T/D Coal Gasifier Using Numerical Simulation Code with Ash Adhension Model.

2001 ◽  
Vol 67 (663) ◽  
pp. 2783-2790
Author(s):  
Kazuyoshi ICHIKAWA ◽  
Hiroaki WATANABE ◽  
Maromu OTAKA ◽  
Jun INUMARU
Keyword(s):  
Numerical Simulation ◽  
Ash Deposition ◽  
Simulation Code ◽  
Entrained Flow ◽  
Coal Gasifier ◽  
Analytical Results ◽  
Deposition Tendency

Numerical Simulation of Coal Ash Particle Behavior in Entrained Flow Coal Gasifier

2003 ◽  
Author(s):  
Hiroaki Watanabe ◽  
Kazuyoshi Ichikawa ◽  
Maromu Otaka ◽  
Jun Inumaru
Keyword(s):  
Numerical Simulation ◽  
Gas Phase ◽  
Coal Gasification ◽  
Current Model ◽  
Electric Power Industry ◽  
Central Research ◽  
Ash Deposition ◽  
Entrained Flow ◽  
Coal Gasifier ◽  
Coal Particles

The objective of this study is to develop an evaluation tool for a design and performance of a coal gasifier by a numerical simulation technique. In the present paper, a gas-particle two phase reacting flow calculation is carried out for a prediction of phenomena in an entrained flow coal gasifier due to coal and ash particles behavior, such as ash deposition on the wall. A transportation of the coal particles is modeled via a Lagrangian manner. The ash particle adhesion on the wall of the gasifier is discriminated by an empirical ash adhesion model based on a liquid phase fraction concept in the ash particle. The gas phase properties are calculated by three dimensional time-mean Eulerian conservation equations. The turbulent flow field is determined by the k-ε two equations model. Radiative heat transfer is calculated by the discrete transfer radiation method. Coal gasification reaction model is composed of three chemical processes in the current model: a pyrolysis, a char gasification and gas phase reactions. 2 tons/day (t/d) air-blown pressurized entrained flow coal gasifier, which has been constructed and operated by Central Research Institute of Electric Power Industry (CRIEPI) was targetted. As a result, a relationship between an operating condition (air ratio) of the gasifier and the gasifier performance is presented. The trend of the ash deposition on the gasifier inner wall is also presented. Comparison between the computational and the experimental results shows that the most feature of the gasifier performance and the profile of the ash deposition have been captured by the present model. It was confirmed that the numerical simulation approach is very useful for the assessment of gasifier performance and operation support.

Investigation of chemical composition and morphology of ash deposition in syngas cooler of an industrialized two-stage entrained-flow coal gasifier

Energy ◽  
2020 ◽  
Vol 194 ◽  
pp. 116901 ◽  
Author(s):  
Guangyu Li ◽  
Shisen Xu ◽  
Xuebin Zhao ◽  
Ruijin Sun ◽  
Chang’an Wang ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Ash Deposition ◽  
Two Stage ◽  
Entrained Flow ◽  
Coal Gasifier

Performance Evaluation of a Two‐Stage Entrained‐Flow Coal Gasifier Using Numerical Simulation

2020 ◽  
Vol 43 (7) ◽  
pp. 1316-1326
Author(s):  
Mohammad-Ali Yazdanpanah Jahromi ◽  
Kazem Atashkari ◽  
Mohammad Kalteh
Keyword(s):  
Numerical Simulation ◽  
Performance Evaluation ◽  
Two Stage ◽  
Entrained Flow ◽  
Coal Gasifier

Evaluation of abnormal burner operation in an entrained flow coal gasifier using numerical modeling

2021 ◽  
pp. 116859
Author(s):  
Joonyeong Nam ◽  
Mukyeong Kim ◽  
Geun Sohn ◽  
Changkook Ryu ◽  
Bongkeun Kim ◽  
...  
Keyword(s):  
Numerical Modeling ◽  
Entrained Flow ◽  
Coal Gasifier ◽  
Burner Operation
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