基于锅炉温度场分布的风量优化控制

Optimized Control of Air Flow Based on Boiler Temperature Field Distribution

全烧煤气锅炉变工况运行时会出现锅炉配风不足或过量的问题,导致锅炉燃烧效率降低或热损失增加。使用先进的激光测量技术,利用气体分子的红外吸收光谱特性可以较好地检测并反应炉膛内温度。借助炉膛内温度场分布情况,结合自控系统建立风量需求模型数据库,对锅炉送风量进行优化控制,可以有效地提高锅炉的热效率。

The problem of insufficient or excessive air distribution will appear in the off-design operation of full gas-fired boiler,which will lead to lower combustion efficiency or more heat loss.Using advanced laser measurement technology and infrared absorption spectrum characteristics of gas molecules,temperature in the furnace can be well detected and reflected.With the help of the distribution of temperature field in the furnace,com⁃bined with the automatic control system,the air demand model database is established to op⁃timize the boiler air supply,which can effectively improve the thermal efficiency of the boiler.