IMECH-IR  > 等离子体与燃烧中心(2009-2011)
Numerical simulations of the temperature and velocity fields in a plasma-arc system and equilibrium calculations of steam injected for syngas recovery from POPs
Wang Y(王阳); Tian JG(田君国); Li YJ(李要建); Wang R(王蕊); Xu YX(徐永香); Sheng HZ(盛宏至); Sheng, H. (hz_sheng@imech.ac.cn)
Source PublicationJoint Conference: International Thermal Treatment Technologies (IT3) and Hazardous Waste Combustors (HWC)
2009
Conference NameJoint Conference: International Thermal Treatment Technologies (IT3) and Hazardous Waste Combustors (HWC)
Conference DateMay 18, 2009 - May 21, 2009
Conference PlaceCincinnati, OH, United states
AbstractA direct current (DC) experimental facility of 30 kW with plasma-arc technology was set up to study the pyrolysis process in the laboratory. The temperature and velocity fields make a great impact on the transfer and reaction among the molecules, and so determining the destruction efficiency. It's difficult to directly measure the temperature of the arc region, therefore numerical simulation becomes a substitute method. According to the dimension of this facility, a magnetohydrodynamic model is used to simulate the temperature and velocity fields. The section drawings clearly exhibit the phenomenon of cathode jet and cathode spot. Furthermore, the treatment of Persistent Organic Pollutants (POPs) agents in a steam-plasma system for syngas recovery has been simulated. Based on the principle of Gibbs free energy minimum, the equilibrium product distribution versus steam content and temperature is calculated. Amount of syngas increases with the increase of temperature, the process acts as energy transformation - electrical energy is finally restored in the syngas. At the ideal temperature of POPs treatment, the energy recovered (Qre) and the energy input (Qin) both increase with the increase of steam content, but Qin subtracted from Qre gets to maximum while the molar ratio of oxygen to carbon (O/C) is near 1. The results show that the plasma-arc technology is an environmentally friendly and economically feasible for the disposal of POPs.
KeywordArc Cathode Jet Cathode Spot Destruction Efficiency Direct Current Electrical Energy Energy Inputs Energy Transformation Environmentally-friendly Equilibrium Calculation Experimental Facilities Magnetohydrodynamic Model Magnetohydrodynamic Plasmas Molar Ratio Numerical Simulation Persistent Organic Pollutants Plasma Systems Product Distributions Pyrolysis Process Steam Content Syn-gas Velocity Field
ISBN9781615671830
Indexed ByEI
Language英语
Document Type会议论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/60470
Collection等离子体与燃烧中心(2009-2011)
Corresponding AuthorSheng, H. (hz_sheng@imech.ac.cn)
Recommended Citation
GB/T 7714
Wang Y,Tian JG,Li YJ,et al. Numerical simulations of the temperature and velocity fields in a plasma-arc system and equilibrium calculations of steam injected for syngas recovery from POPs[C],2009.
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