【作者】 李黔东；

【导师】 叶世超；

【作者基本信息】 四川大学 ， 化学工程， 2006， 硕士

【摘要】 湿法烟气脱硫(WFGD)是当前应用最广泛的脱硫技术,反应器则是湿法烟气脱硫技术的关键。气液逆流的三相流化床(湍球塔,TBC)是一种有效的湿法烟气脱硫装置。目前应用的湍球塔操作基本上都属于Ι类湍球塔流态化操作。应用中发现在液气比较小的条件下,湍球塔操作上会出现气体沟流、填料不规则迁移等情况。而振动流化床具有改善流化质量。增强床层内湍动程度的作用。本文结合振动流化床和三相流化床的特点,首次提出了振动三相流化床的概念并围绕它展开了振动三相流化床应用性实验研究。自行建立了一套振动三相流化床实验装置并利用自建装置开展了深入的流体力学特性和脱硫特性实验研究。在流体力学特性实验中,研究了在Π类湍球塔流态化操作条件下振动三相流化床床层压降、膨胀床层高度、液含率等方面的问题,取得了在不同的气速、液体喷淋量、填料高度、振动强度等条件下,床层压降、膨胀床层高度、液含率等的大量实验数据;通过对这些数据的分析和归纳,获得了三相流化床在振动和无振动两种条件下床层压降等表征流体力学特性的变化规律;脱硫特性实验方面,首次提出了在Π类湍球塔流态化操作条件下进行气体吸收操作并且按照钠碱法机理研究了在不同液气比(L/G)、碱液浓度、填料高度、温度、振动强度等主要影响因素与脱硫效率之间的关系。通过对实验数据处理与分析,获得了应用钠碱法在振动三相流化床上进行烟气脱硫的基本规律。在模型研究方面,本文结合实验数据,用因次分析法获得了振动三相流化床床层压降、膨胀床层高度和持液量这三个反映流体力学特性的参量的准数关联式,并与实验数据进行了对比验证。本文从实验的角度出发,对振动三相流更多还原

【Abstract】 Wet method flue gas desulfuration (WFGD) technology is the most comprehensive desulfuration technology currently. The reactor is the key of WFGD technology. Three-phase fluidized bed with gasses-liquid countercurrent operation (Turbulent Bed Contactor, TBC) is a sort of powerful WFGD device. The TBC operation applied for the moment basically belongs to TypeΙturbulent bed contactor fluidized operation. It will rose bad operational event such as channeling and irregularity moving of padding on the conditions of small liquid-gasses rate. Vibrating fluidized bed has the function of improving fluidization quality and enhancing the turbulent degree. Accordingly, the main object of this paper is to build up a set of WFDG device which combine the advantages of vibrating fluidized bed (VFB) and Turbulent bed contactor (TBC), and to carry on the foundation research of fluid mechanics and mass transfer characteristic.First of all, a set of vibrating three-phase fluidized bed experimental system was designed and a serial of experiment about hydromechanics and desulfuration characteristic was carried out in this foundation. In the hydromechanics characteristic experiment I mostly researched about the matter of bed pressure drop, bed density, the liquid phase contain rate of vibrating three-phase fluidized bed, and acquired a great deal of experimental data about bed pressure drop, bed density, the liquid phase contain rate in different conditions of gas velocity, liquid spray density, height of layer or vibration intensity. Through the analyses and induction about these更多还原