适应火电机组深度调峰的轴流式送风机改造研究

Research on Retrofit of Axial-flow Forced Draft Fan for Deep Peak Shaving of Thermal Power Unit

为适应燃煤发电机组深度调峰运行,针对某电厂的轴流式动叶调节送风机进行了试验研究,提出了送风机动叶片数减半、变频调速和局部改造等改造方案。然后,从风机调节性能与经济性两个方面,对各改造方案进行分析对比,最终确定采用送风机动叶片数减半改造方案。电厂按此方案实施后,改造取得了预期的效果。

To satisfy the demands of deep peak shaving of the unit,an experimental study has been carried out on an axial flow forced draft fan with adjustable rotor blades,three kinds of retrofit schemes are put forward,including the revamping scheme of halving the number of fan blades,variable frequency speed adjustment scheme and local transformation scheme.The three schemes are compared by considering the adjustment performance and economy of the fan and finally the scheme of halving the number of fan blades is selected.According to this scheme,the forced draft fan has retrofitted in the power plant.The operation of the modified fan shows that very satisfactory results are achieved.