【作者】 李文沧；

【导师】 马永光； 苑龙；

【作者基本信息】 华北电力大学 ， 控制工程， 2011， 硕士

【摘要】 邯峰发电厂锅炉燃煤使用无烟煤与贫煤混烧,因实际煤种与设计煤种差别较大,挥发份和燃烧值均低于设计值,而且变化较大,使得进入炉膛的燃料的燃烧特性随时发生改变,对燃烧稳定性造成很大危害,随时可能发生燃烧恶化引起炉膛灭火。同时由于煤质差,加上“W”火焰炉的特殊结构,锅炉偏烧、风煤配比、飞灰含碳量高等问题一直是困难锅炉高效运行的难题。解决这些难题的有效途径是对炉膛内的燃烧状况进行直接观测,三维温度场火焰监控系统就能实现这一要求。本项目采用二十只火焰图像探测器从炉膛中获取燃烧火焰辐射图像信息,利用辐射图像处理技术、先进求解策略,实现对炉膛温度场和断面热负荷等分布的监视,指导燃烧调整和控制,提高锅炉的安全性和经济性;利用典型区域的三维燃烧温度场信息,得到炉膛燃烧辐射能信号,引入DCS控制回路,实现风煤配比的优化控制,提高热力参数控制的稳定性和调节能力。更多还原

【Abstract】 Hanfeng power plant boiler coal use blind coal and lean coal mixing, because the actual coal and design coal greater difference between, volatile matter and heat values were lower than that of the design value, and large variation, make enters the furnace fuel combustion properties occur at any time of change, to cause great harm, burning stability anytime possible extinguishing, causing deterioration. At the same time because of coal quality is poor, plus "W" flame furnace special structure, partial burn coal boiler, the wind ratio, carbon-in-ash higher is always difficult boiler efficient operation of difficult problems. To solve these problems, the effective way is to direct observation of combusting status in the furnace combustion. Three-dimensional temperature field of flame monitoring system can achieve this requirement.This project uses 20 flame detector extract Combustion flame radiation image information from furnace. Using radiation image processing technology, advanced solution strategy, monitoring of furnace temperature field and thermal load distribution etc. such as guiding combustion adjustment and control and improve the safety and economy. By using the typical regions of 3D combustion temperature field information, get hearth burning radiant energy signal, introduce DCS control loop, realize the wind coal proportion of the optimal control, improve the thermodynamic parameters control stability and Control quality.更多还原