【摘要】 针对实际工业应用的多管文丘里循环流化床烟气脱硫装置,按照冷态模化试验的相似准则建立了冷态模化试验台。通过在试验台入口通道加装不同形式导流板、改变文丘里管群管径分布,利用颗粒图像速度仪(PIV)对不同几何结构条件下多管文丘里内的流量分布进行了测量,同时测量了不同工况下试验台的阻力损失。结果表明,单侧进风、入口通道内无导流装置时,等径文丘里管群各管流量存在明显偏差,采取加装入口导流板或改变文丘里管管径分布均能达到使多管文丘里管各管均流的目的,从而改善脱硫塔内的脱硫性能。流线型入口导流板不仅能使各文丘里管均流,而且不会明显增加入口段阻力损失。所得试验结果对多管文丘里循环流化床烟气脱硫的工业应用具有重要的指导价值。更多还原

【Abstract】 Based on similarity criteria a cold model test setup was built for simulating the industrial-scale multi-Venturi Circulating Fluidized Bed Flue Gas Desulfurization(CFB-FGD) facility.The experimental tests on the gas flow rate distribution in multi-Venturi distributor were carried out with Particle Image Velocimetry(PIV) when adding the various guiding blades at the entrance of the test setup or optimizing diameter distribution of the Venturi tube group.And pressure drops across the test setup under different geometric configurations were measured.The results show that the gas flow rate distribution in multi-Venturi group is obviously uneven for the original design condition without any guiding blades at the entrance of the test setup and with the same diameter of the Venturi tubes when the flue gas enters the setup unilaterally.Adding streamline guiding blades at the entrance of the setup or adopting proper diameter distribution for the venturi tube group equalizes the gas flow rate among Venturi tube group in order to improve desulfurization performance.The streamline guiding blades not only make the gas flow rate in multi-Venturi distributor well-proportioned,but also prevent from the visible increase in the pressure drop of the desulfurization reactor.The results offer valuable references for the industrial application of multi-Venturi CFB-FGD.更多还原