Effect of coal particle size on gasification performance of two‐stage entrained‐flow coal gasifier

2007 ◽

Cited By ~ 2

Author(s):

Min Du ◽

Yingli Hao ◽

Yan Wang

Keyword(s):

Particle Size ◽

Coal Particle ◽

Particle Deposition ◽

Coal Gasification ◽

Volatile Component ◽

Operating Conditions ◽

Two Stage ◽

Entrained Flow ◽

Second Stage ◽

Entrained Flow Gasifier

Coal gasification has received increasing attention in the past two decades due to the growing demand for clean gaseous fuels. Numerical simulations of the coal gasification process inside a two-stage dry feed entrained flow gasifier were carried out using the commercial CFD solver FLUENT. The predicted main product gas components and carbon conversion were in well agreement with the measured data, which verified the validity of the model. A series of calculations were carried out to investigate the effects of operating parameters on the performance of gasifier, including the coal particle size, coal type and coal feeding ratio between the first and the second stages. The flow field, coal particle deposition on the wall, gas temperature and mole fraction inside of the gasifier were analyzed. And the simulation results indicated that the performance of gasifier is improved with decreasing particle size. The low volatile component fraction or high ash content in coal is not propitious to the gasification performance. And the performance of gasifier of the case with coal distribution with 75% (first stage) vs. 25% (second stage) is better than the case with 50% (first stage) vs. 50% (second stage) and the case with 100% for the first stage. The calculation is helpful for designing the operating conditions of the gasifier.

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

Energy ◽

10.1016/j.energy.2020.116901 ◽

2020 ◽

Vol 194 ◽

pp. 116901 ◽

Cited By ~ 4

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

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Parameter analysis of an entrained flow gasification process

Advances in Mechanical Engineering ◽

10.1177/1687814018815255 ◽

2018 ◽

Vol 10 (12) ◽

pp. 168781401881525 ◽

Cited By ~ 1

Author(s):

Hakduck Kim ◽

Kitae Jeon ◽

Heechang Lim ◽

Juhun Song

Keyword(s):

Particle Size ◽

Residence Time ◽

Coal Particle ◽

Feeding Rate ◽

Parameter Analysis ◽

Parameter Study ◽

Carbon Conversion ◽

Entrained Flow ◽

Fuel Ratio ◽

Entrained Flow Gasification

This work presents primary results of a parameter study for entrained flow gasification using a steady-flow reactor model. The influences of important parameters such as coal types, gasifier pressure, gas/coal feeding rate, and coal particle size were studied based on coal conversion and gas product species. The prediction results were compared and validated against those published previously. In particular, a relative importance of reaction stoichiometry, temperature, reaction time (kinetics), or residence time considered in this simulation work was evaluated to affect the gas composition produced from different coals. The optimal carbon monoxide concentration was observed at an oxygen-to-fuel ratio of 0.8, while a greatest carbon conversion was found at a steam-to-fuel ratio of 0.4. Coal particle size has a strong influence on carbon conversion. However, the coal feeding rate has no effect on carbon conversion despite differences in residence time.

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