Numerical simulation method for interaction of coal powder particles in burning

Abstract

The invention discloses a numerical simulation method for interaction of coal powder particles in burning, belonging to the technical field of computer numerical simulation. According to the characteristics of burning of the coal powder particles, the method is characterized in that on the basis of calculation of an existing mathematical model of fluid mechanics software FLUENT, FLUENT UDF and FLUENT Scheme are used for hybrid programming, and user-customized models, namely, a coal powder particles interaction model (a particle construction form, a particle mass change model, a particle size dynamic change model and a volatile element precipitation model) and a mass change storage mechanism, are coupled, so that numerical simulation of interaction of the coal powder particles in burning is realized. Experiments show that change rules of coal powder particle temperature and so on obtained through the numerical simulation method are generally consistent with experiment data. Through adoption of the method, a real, objective interaction mechanism of coal powder particles in burning is disclosed conveniently and efficiently, thereby providing powerful theoretical basis and technological support for improvement and optimization design of the coal powder burning technology.

Description

technical field [0001] The method of the invention belongs to the technical field of computer numerical simulation, and more specifically relates to a numerical simulation method for the interaction between coal powder particles in the combustion process. Background technique [0002] Energy is an important material basis and production factor to support social development and economic growth. Sufficient and stable energy supply not only provides power for industry, provides guarantee for agriculture, promotes technological progress, and guarantees the development of the national economy, but also promotes the improvement of people's quality of life , create numerous employment opportunities, and promote the development and progress of human society. The rapid development of the world economy has also promoted the development of energy and the improvement of the utilization technology. The two not only promote each other, but also restrict each other. Coal is China's basic ...

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Problems solved by technology

[0005] Zhao Yunhua from Harbin Institute of Technology considered the influence of the external initial conditions of uniformly distributed spherical pulverized coal groups, such as ambient temperature and atmosphere concentration, on the ignition and combustion of pulverized coal, but they lacked the influence of the combustion of different particles inside the pulverized coal cluster. At present, the domestic research on the influence of the interaction mechanism between the particle size and spacing of pulverized coal particles on the combustion process is still blank, so it cannot be effectively used to guide the improvement and optimal design of pulverized coal combustion technology in industrial production , unable to provide convenient and efficient technical support for energy saving, consumption reduction and emission reduction measures for power plant boilers, blast furnace coal injection and other industries

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