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Large coal-fired power plant baghouse design and optimization of flow distribution

Author: LianPing
Tutor: ZhuLin
School: Nanjing University of Information Engineering
Course: Environmental Science
Keywords: Baghouse Air distribution Physical model experiments Numerical Simulation Design and Optimization
CLC: X701.2
Type: Master's thesis
Year: 2011
Downloads: 132
Quote: 1
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Abstract


In recent decades, the development momentum of China's industrial production is very rapid, and the resulting energy consumption and environmental pollution problems are more serious. China's energy structure determines the coal-fired plants in the electricity industry in the backbone of the position, and because of smoke from burning coal smoke pollution caused by air pollution in China has become the one of the main forms. Therefore, in the research and promotion of efficient coal-fired power plant dust removal technology for China's economic and social development are of great significance. Along with China's rising environmental requirements, the traditional ESP has become increasingly difficult to meet the thermal power plant boiler soot emission concentration requirement, but as an opportunity to dust effects baghouse relatively better developed gradually, and has practical application in a number of power plants have achieved good results. However, with the continuous development of baghouse technology and applications, but also exposed some problems can not be ignored, mainly for systems greater resistance, bag life is short, frequent replacement bag, etc., but not precipitator air distribution uniformity is caused by a major reason for these problems. Since dust internal flow is very complex, thus making the air distribution measures baghouse design, designers often rely on empirical data or a simple model calculation results are given design, there is a strong subjectivity, so that dust airflow is distributed evenly practical engineering degree less than the design requirements. In response to this situation, in order to give practical engineering baghouse air distribution measures designed to provide the necessary basis for optimizing airflow inside the dust distribution, this study of a large coal-fired power plant 300MW unit baghouse project for the study, and which is located in the front side of a direct connection pipe segment as the prototype filter channel, were established physical models and numerical simulation model, the physical model experiments and numerical simulations two means measures under different air distribution system airflow distributions were tested and experiments, applicable to the project design and optimization flow distribution program and in the actual project through field experiments measured the effectiveness of the design solutions were investigated and verified. The results showed that the air distribution obtained by experiment design applied to practical engineering, the precipitator inlet section and internal distribution of the filtration unit flow air distribution can meet the design requirements. Research process combines the physical model experiments, numerical simulations and field test experiments and tested means to explore and come to apply to coal-fired power plant baghouse air distribution engineering design studies of specific methods. Study concludes baghouse air distribution measures the actual project design and optimization to provide a reference and basis for the future of engineering and research has certain reference and guidance.

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CLC: > Environmental science, safety science > Processing and comprehensive utilization of waste > General issues > Exhaust gas processing and utilization > Smoke and dust
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