The Experts below are selected from a list of 2562 Experts worldwide ranked by ideXlab platform
Zhang Zhong-li - One of the best experts on this subject based on the ideXlab platform.
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Study on Simulation Equipment of Coal-fired 300MW Power Plant Flue Gas Desulfurization System
Computer Simulation, 2013Co-Authors: Zhang Zhong-liAbstract:The whole range simulator of wet flue gas desulfurization(FGD) is very important in optimizing operation and staff training. Based on virtual DPU technology and modular software technology, a wet FGD simulator was established. The Absorption Tower is a core part of the FGD system, what with the influence factors of desulfurization efficiency is numerous and the dynamic characteristic is complicated. The model of Absorption Tower is the emphasis and difficulty in whole modeling of simulator. With a desulfurization Absorption Tower of coal-fired 300MW power plant for the simulation object, based on the study of mechanism, an Absorption Tower model was built. The model included the limestone dissolving model, atomization model, gas-liquid mass transfer model and ionic reaction model. A series of sub-model were established using the modularized modeling method and were coupled according to practical system. The model was applied to investigate the effects of sulphur content and gas mass flow on desulfurization efficiency and PH value. The result predicts and measures dynamic characteristics compared well, which is a further proof of the accuracy of the model.
Rui Luo - One of the best experts on this subject based on the ideXlab platform.
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Experimental investigation on gas-liquid flow, heat and mass transfer characteristics in a dual-contact-flow Absorption Tower
Chemical Engineering Research and Design, 2014Co-Authors: Dejuan Kong, Yafei Zhang, Qulan Zhou, Rui LuoAbstract:Abstract As a kind of chemical reactor, the dual-contact-flow Absorption Tower has been widely used for SO2 Absorption in recent years. However, studies on heat transfer characteristics of the absorber have been rarely carried out. There is also lack of an integrated partition map of flow pattern in the dual-contact-flow Absorption Tower. In this paper, the gas–liquid flow, heat and mass transfer characteristics in the dual-contact-flow Absorption Tower have been experimentally investigated. Direct observation, probability density function (PDF) and power spectral density function (PSD) methods are comparatively adopted in the flow pattern analysis. The partition map of flow pattern in the dual-contact-flow Absorption Tower is obtained through integrating a large quantity of experimental data. In addition, empirical formulas of both heat and mass transfer performances have been developed. Application of empirical formulas has also been stated. The research results obtained in the present study can provide guidance for estimating the practical application performance.
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Numerical simulation on gas–liquid flow, heat, and mass transfer characteristics in a dual-contact-flow Absorption Tower
Asia-Pacific Journal of Chemical Engineering, 2013Co-Authors: Yafei Zhang, Dejuan Kong, Qulan Zhou, Rui LuoAbstract:Because of the limitation of accurate measurement of microscopic parameters in the dual-contact-flow Absorption Tower, the diameter, velocity, temperature of a single droplet, and the concentration of matter in it are difficult to be obtained through experimental methods. However, these data are of crucial importance to understand the behaviors of liquid phase in the absorber. In this paper, the microscopic motion, heat, and mass transfer characteristics of droplets in the dual-contact-flow Absorption Tower have been numerically simulated, and the results have been validated by experimental data. The motion trails of droplets under different initial jetting velocities and gas velocities are studied, and the fall-back characteristics have been obtained. The critical diameters of droplets increase remarkably with the increase of gas velocity but have limited relationship with the liquid initial jetting velocity. The heat and mass transfer capacities of droplets have also been investigated. It is found that because of the diversity between the concentration relaxation time and the temperature relaxation time, there may be considerable difference between heat and mass transfer behaviors. All the work above is a complement of the basic performance of droplets in the dual-contact-flow absorber and can supply guidance for estimating the practical application performance. © 2013 Curtin University of Technology and John Wiley & Sons, Ltd.
Wu Haolun - One of the best experts on this subject based on the ideXlab platform.
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Application of computational fluid dynamics in flue gas desulfurization
Computer-Aided Engineering, 2011Co-Authors: Wu HaolunAbstract:To optimize the flow field distribution in desulfurization Absorption Tower,improve desulfurization efficiency,and decrease desulfurization investment and operation cost,a numerical simulation method of flue gas desulfurization based on RANS equations and multiphase flow model is proposed,and the process of flue gas desulfurization in Absorption Tower is simulated based on multiphase flow model by FLUENT.The areas of flue gas and serosity in Absorption Tower are modeled and meshed,the flow field of the area inside Absorption Tower and near jet guns is simulated,and the flow pattern of serosity and flue gas inside Absorption Tower is obtained.The simulation results show the feasibility of the method.The suggestions on the design of Absorption Tower and jet guns are proposed by the analysis on wetted wall phenomenon.
Andrzej Górak - One of the best experts on this subject based on the ideXlab platform.
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Design and optimization of a nitric acid recovery plant from nitrous waste gases
Computers & Chemical Engineering, 1996Co-Authors: U. Wiesner, M. Wittig, Andrzej GórakAbstract:Abstract The modelling of the multicomponent Absorption with chemical reaction is not a trivial problem due to superposition of many driving forces - multicomponent diffusion, chemical interactions, convective flows, multicomponent thermodynamic interaction etc. Therefore, adequate theoretical description of multicomponent reactive systems calls for the application of the Maxwell-Stefan equations and for the use of matrix coupled mass transfer equations together with the relevant reaction kinetics. On this basis, a countercurrent Absorption Tower for chemisorption of nitrogen oxides (NOx) to nitric acid is considered and a general non-equilibrium stage model is developed for its design and optimization.
Dejuan Kong - One of the best experts on this subject based on the ideXlab platform.
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Experimental investigation on gas-liquid flow, heat and mass transfer characteristics in a dual-contact-flow Absorption Tower
Chemical Engineering Research and Design, 2014Co-Authors: Dejuan Kong, Yafei Zhang, Qulan Zhou, Rui LuoAbstract:Abstract As a kind of chemical reactor, the dual-contact-flow Absorption Tower has been widely used for SO2 Absorption in recent years. However, studies on heat transfer characteristics of the absorber have been rarely carried out. There is also lack of an integrated partition map of flow pattern in the dual-contact-flow Absorption Tower. In this paper, the gas–liquid flow, heat and mass transfer characteristics in the dual-contact-flow Absorption Tower have been experimentally investigated. Direct observation, probability density function (PDF) and power spectral density function (PSD) methods are comparatively adopted in the flow pattern analysis. The partition map of flow pattern in the dual-contact-flow Absorption Tower is obtained through integrating a large quantity of experimental data. In addition, empirical formulas of both heat and mass transfer performances have been developed. Application of empirical formulas has also been stated. The research results obtained in the present study can provide guidance for estimating the practical application performance.
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Numerical simulation on gas–liquid flow, heat, and mass transfer characteristics in a dual-contact-flow Absorption Tower
Asia-Pacific Journal of Chemical Engineering, 2013Co-Authors: Yafei Zhang, Dejuan Kong, Qulan Zhou, Rui LuoAbstract:Because of the limitation of accurate measurement of microscopic parameters in the dual-contact-flow Absorption Tower, the diameter, velocity, temperature of a single droplet, and the concentration of matter in it are difficult to be obtained through experimental methods. However, these data are of crucial importance to understand the behaviors of liquid phase in the absorber. In this paper, the microscopic motion, heat, and mass transfer characteristics of droplets in the dual-contact-flow Absorption Tower have been numerically simulated, and the results have been validated by experimental data. The motion trails of droplets under different initial jetting velocities and gas velocities are studied, and the fall-back characteristics have been obtained. The critical diameters of droplets increase remarkably with the increase of gas velocity but have limited relationship with the liquid initial jetting velocity. The heat and mass transfer capacities of droplets have also been investigated. It is found that because of the diversity between the concentration relaxation time and the temperature relaxation time, there may be considerable difference between heat and mass transfer behaviors. All the work above is a complement of the basic performance of droplets in the dual-contact-flow absorber and can supply guidance for estimating the practical application performance. © 2013 Curtin University of Technology and John Wiley & Sons, Ltd.
