锅炉深度余热利用技术改造后造成除氧器水位失调的解决对策

Countermeasure for Water Level Imbalance of Deaerator Caused by Deep Utilization Technical Transformation of Boiler Exhaust Heat

为了解决某厂锅炉深度余热利用技术改造后投热媒水温度自动时造成除氧器水位失调的问题,对水位失调的原因进行分析,并从设备投资、工作量和节能效果等方面进行对比,最终选择了将原来的热媒水温度自动调节系统由恒值控制方式改为随动控制方式的自动调节系统。改造后的自动调节系统在各种工况下投用效果显示,能够将除氧器水位控制在425~650mm的正常范围内,且对锅炉深度余热利用系统回收烟气热量的影响较少,说明该方案能够较好地解决技术改造带来的问题。

In order to solve the problem that the water level of deaerator is out of balance when the temperature regulation of heat medium water is in automatic mode after the deep utilization technology transformation of boiler exhausted heat, the reason for the imbalance of water level is analyzed, and the original heat medium water temperature automatic adjustment system is converted from the constant value control method to the follow-up control method combined with the compared results of the equipment investment, workload and energy saving effect.The effect of the application under various working conditions shows that the modified automatic adjustment system can control the water level of the deaerator in the normal range of 425-650mm, and has less influence on the heat recovery of the boiler waste heat recovery system.The scheme can better solve the problems brought about by the technological transformation.