巴威W型火焰锅炉配风优化方案及试验

发布时间：2018-12-28 18:45

【摘要】：贵州省是一个煤炭资源极为丰富的能源资源大省,有江南煤海之称。国家发展与改革委员会2号文件已经将贵州定位为国家能源基地。将资源优势转化为经济优势,发展是贵州省的第一要务。截至2008年底,已发现的井田或矿区331处,累计煤炭资源储量504.27亿吨。全省范围内,除东部有的属少煤、缺煤地区外,在全省87个县中,就有74个产煤县,含煤面积占全省国土面积的40%以上。目前探明的无烟煤的储量高达200亿吨。在多煤地区已经建设了20几座大型火力发电厂,是西电东送的重要能源基地,大部分机组燃用无烟煤,所以引进了东方锅炉集团、北京巴威锅炉制造公司、美国福斯特惠勒三家公司的W火焰锅炉技术。本文以一台北京巴威的300MW W型火焰锅炉为基础建立模型,目的在于改善现有运行装置的能源利用效率。本文来源于电厂与锅炉所的合作项目,具有很强的工程应用背景。因为电厂的锅炉热效率一直在87%左右,未能达到锅炉厂的设计值91.85%。锅炉的热效率偏低,影响了电厂的经济利益,同时也带来了节能减排的压力。本文通过fluent6.3对三类工况进行了数值模拟,以找到配风的优化方案,工况设置如下：在进入燃烧器的总二次风量不变的情况下,以基准工况为基础,通过减少内二次风风量的比例、改变内二次风旋流叶片的角度、改变外二次风旋流叶片的角度。通过模拟找到影响火焰下冲能力、温度场分布及氧气浓度分布的主要调整方法,完成初步的锅炉配风调整方案,结合调试人员在同类型锅炉多年的调试经验,最终得到了符合实际的调整方案,使锅炉热效率最终提高到90.82%。
[Abstract]:Guizhou Province is a coal resource is extremely rich in energy resources large province, known as the Jiangnan coal sea. The second document of the National Development and Reform Commission has positioned Guizhou as a national energy base. The development is the first priority of Guizhou province to transform the resource superiority into the economic advantage. By the end of 2008, 331 coal fields or mining areas had been discovered, with cumulative coal reserves of 50.427 billion tons. In the whole province, there are 74 coal-producing counties in the 87 counties of the province, except for some coal shortage areas in the eastern part of the province. The coal-bearing area accounts for more than 40% of the total land area of the province. At present, the proven reserves of anthracite as high as 20 billion tons. More than 20 large coal-fired power plants have been built in the multi-coal area, which is an important energy base for the transmission of electricity from the west to the east. Most units are fired with anthracite, so the Dongfang Boiler Group, the Beijing Bawei Boiler Manufacturing Company, was introduced. Foster Wheeler three companies of the W-flame boiler technology. This paper builds a model based on a 300MW W flame boiler in Beijing Bawei. The purpose of this model is to improve the energy utilization efficiency of the existing operating units. This paper comes from the cooperative project between power plant and boiler institute, and has a strong engineering application background. Because the boiler thermal efficiency of the power plant has been about 87%, it fails to reach the design value of the boiler plant 91.85. The thermal efficiency of boiler is low, which affects the economic benefit of power plant, and also brings the pressure of energy saving and emission reduction. In this paper, the numerical simulation of three kinds of conditions is carried out by fluent6.3 to find out the optimal scheme of air distribution. The operating conditions are set as follows: under the condition that the total secondary air flow into the burner remains unchanged, the basic working conditions are taken as the basis. By reducing the ratio of the inner secondary air volume, the angle of the inner secondary air swirl blade and the outer secondary air swirl blade are changed. Through the simulation, the main adjustment methods affecting the flame-down ability, temperature field distribution and oxygen concentration distribution are found, and the preliminary adjustment scheme of boiler air distribution is completed. Combined with the debugging experience of the same type boiler for many years, Finally, the adjustment scheme is obtained, and the boiler thermal efficiency is raised to 90.82%.
【学位授予单位】：昆明理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM621.2

【参考文献】