Documents disponibles écrits par cet auteur

Experimental and numerical study of the flow field and temperature field for a large - scale radiant syngas cooler / Jianjun Ni in Industrial & engineering chemistry research, Vol. 51 N° 51 (Décembre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 51 (Décembre 2012) . - pp.4452–4461 Titre : Experimental and numerical study of the flow field and temperature field for a large - scale radiant syngas cooler Type de document : texte imprimé Auteurs : Jianjun Ni, Auteur ; Guangsuo Yu, Auteur ; Qinghua Guo, Auteur Année de publication : 2012 Article en page(s) : pp.4452–4461 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Gas  Temperature Résumé : Experimental and numerical studies on the gas-particle flow field and temperature field in the industrial-scale radiant syngas cooler (RSC) have been carried out. The bench-scale cold model experiment was presented for measuring the gas flow field in the RSC. The accuracy and performance of four turbulent flow models were evaluated according to the comparison of predicted results with experimental results. The ash particle trajectories were predicted by the stochastic Lagrangian model and the interaction between the gas and particle phase was also considered by two-way coupling method. A discrete ordinate model (DOM) was used for solving the radiative heat transfer equation when the radiative properties were calculated by weighted-sum-of-gray-gases model (WSGGM). The Ranz−Marshall correlation for the Nusselt number was used to account for convection heat-transfer between the gas phase and the particle phase. The ash particle radiative heat transfer was also considered. The physical properties of gas mixtures were calculated by the mass-weighted-mixing law. The results indicate that the inlet jet flow intensity is dependent on the inlet diameter, but the length of the jet is independent of the inlet diameter. The thickness of the deposition on the membrane wall has great influence on the heat-transfer. The average temperature profiles of particle are higher than gas in the inner cylinder, and it is inversed in the annular. Furthermore, the results show that particles sizes smaller than 580 μm will be entrained into the annular, but the particle size between 400 and 580 μm cannot be entrained out. And the escaping particle’s temperature is lower than the critical temperature when the deposition thickness is 0.2 mm. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100014r [article] Experimental and numerical study of the flow field and temperature field for a large - scale radiant syngas cooler [texte imprimé] / Jianjun Ni, Auteur ; Guangsuo Yu, Auteur ; Qinghua Guo, Auteur . - 2012 . - pp.4452–4461. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 51 (Décembre 2012) . - pp.4452–4461 Mots-clés : Gas  Temperature Résumé : Experimental and numerical studies on the gas-particle flow field and temperature field in the industrial-scale radiant syngas cooler (RSC) have been carried out. The bench-scale cold model experiment was presented for measuring the gas flow field in the RSC. The accuracy and performance of four turbulent flow models were evaluated according to the comparison of predicted results with experimental results. The ash particle trajectories were predicted by the stochastic Lagrangian model and the interaction between the gas and particle phase was also considered by two-way coupling method. A discrete ordinate model (DOM) was used for solving the radiative heat transfer equation when the radiative properties were calculated by weighted-sum-of-gray-gases model (WSGGM). The Ranz−Marshall correlation for the Nusselt number was used to account for convection heat-transfer between the gas phase and the particle phase. The ash particle radiative heat transfer was also considered. The physical properties of gas mixtures were calculated by the mass-weighted-mixing law. The results indicate that the inlet jet flow intensity is dependent on the inlet diameter, but the length of the jet is independent of the inlet diameter. The thickness of the deposition on the membrane wall has great influence on the heat-transfer. The average temperature profiles of particle are higher than gas in the inner cylinder, and it is inversed in the annular. Furthermore, the results show that particles sizes smaller than 580 μm will be entrained into the annular, but the particle size between 400 and 580 μm cannot be entrained out. And the escaping particle’s temperature is lower than the critical temperature when the deposition thickness is 0.2 mm. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100014r

Three - dimensional temperature distribution of impinging flames in an opposed multiburner gasifier / Yan Gong in Industrial & engineering chemistry research, Vol. 51 N° 22 (Juin 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 22 (Juin 2012) . - pp. 7828–7837 Titre : Three - dimensional temperature distribution of impinging flames in an opposed multiburner gasifier Type de document : texte imprimé Auteurs : Yan Gong, Auteur ; Qinghua Guo, Auteur ; Qinfeng Liang, Auteur Année de publication : 2012 Article en page(s) : pp. 7828–7837 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Gasification Résumé : Based on the bench-scale opposed multiburner (OMB) gasifier, a new combination of the optical sectioning tomography (OST) and two-color method has been proposed and applied to reconstruct the three-dimensional (3-D) temperature distribution of the gasifier by employing a single charge-coupled device (CCD) camera installed on the top of the gasifier. The reconstruction method is first applied in diesel gasification and the reconstructed results are validated by calibrated thermocouples and a side imaging system; thus the 3-D temperature distribution of coal–water slurry (CWS) gasification is reconstructed. The results show that the temperature distribution is more spatially homogeneous and the average temperature is higher with blurry contours of flame than that of diesel. The overall temperature of the gasifier rises with the increase of oxygen to carbon ratio, and the high temperature region which ranges from 1700 to 2200 K remains in the axis of the gasifier steadily and remains a safe distance from the refractory wall, which makes the temperature of the refractory wall below 1550 K and makes the participating medium maintain a stable condition for gasification. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie2028602 [article] Three - dimensional temperature distribution of impinging flames in an opposed multiburner gasifier [texte imprimé] / Yan Gong, Auteur ; Qinghua Guo, Auteur ; Qinfeng Liang, Auteur . - 2012 . - pp. 7828–7837. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 22 (Juin 2012) . - pp. 7828–7837 Mots-clés : Gasification Résumé : Based on the bench-scale opposed multiburner (OMB) gasifier, a new combination of the optical sectioning tomography (OST) and two-color method has been proposed and applied to reconstruct the three-dimensional (3-D) temperature distribution of the gasifier by employing a single charge-coupled device (CCD) camera installed on the top of the gasifier. The reconstruction method is first applied in diesel gasification and the reconstructed results are validated by calibrated thermocouples and a side imaging system; thus the 3-D temperature distribution of coal–water slurry (CWS) gasification is reconstructed. The results show that the temperature distribution is more spatially homogeneous and the average temperature is higher with blurry contours of flame than that of diesel. The overall temperature of the gasifier rises with the increase of oxygen to carbon ratio, and the high temperature region which ranges from 1700 to 2200 K remains in the axis of the gasifier steadily and remains a safe distance from the refractory wall, which makes the temperature of the refractory wall below 1550 K and makes the participating medium maintain a stable condition for gasification. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie2028602