基于液力耦合器和静叶联调的引风机控制

Control of Induced Draft Fan Based on Combined Coordination of Hydraulic Compler and stationary Vane

以液力耦合器(下称液耦)为主的调节方式将是未来引风机发展的方向。但实际应用之中由于液耦本身的调节特性和设备选型的匹配问题,还是对炉膛压力的调节造成了一定的影响。探索一条静叶和液耦联合调节炉膛压力的自动控制方案是具有现实意义和实用价值的。提出了液耦与静叶联合调节自动控制的方案,方案建立在冷态通风试验参数和引风机出力试验的基础上,在准确把握引风静叶和液耦调节特性后,改造了自动控制方案,使液耦与静叶联合调整负压。试验分析和结果表明,本文提出的方案成功解决了三河电厂的引风机液耦和静叶联调问题,同时考虑了RB工况及MFT等恶劣工况的处理方案,具有较强的实用性。

Using the hydraulic coupler as the main regulating method is the direction of the future development of the induced draft fan. But in reality, because of the regulating character of the hydraulic coupler and the coordination between the coupler and other equipments, the burner＇s internal pressure control has been affected by putting the hydraulic coupler into practical use. It is of great importance to find a way to coordinate the hydraulic coupler and the stationary vane together to regulate the burner＇s internal pressure. Here we are presenting a solution for the coordination. This solution is based on the testing data of cold ventilation and burner＇s output. This plan can regulate the burner＇s pressure efficiently since it is built upon the hydraulic coupler and the stationary vane＇s different regulating characters. From the testing data we can see that this plan gave us a successful solution to the coordination of the hydraulic coupler and the stationary vane at Sanhe Power Plant, while putting RB and MFT situations into concern. Its practical usability is proved.