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在直径92mm的有机玻璃制导向管充气喷动床反应器内,以玻璃珠为实验物料,以空气为喷动和充气气体,在导向管充气喷动床的最大允许充气速度范围内,考察充气速度对导向管充气喷动床的最小喷动速度、床层压降、中心喷泉高度的影响.采用示踪粒子的方法,研究充气速度对颗粒在壁效应区的下移速度的影响.并考察了热模装置内充气速度对壁与床层间传热系数的影响.结果表明:充气有利于导向管喷动床的喷动及操作稳定性;充气有利于颗粒的循环;并能提高壁与床层间的传热系数.综合考虑床层的几何尺寸以及气体和固体的物性,并根据实验数据,得到了导向管充气喷动床的最小喷动速度关联式,为其设计和操作提供参考.
In the diameter of 92mm plexiglass guide tube inflatable spray bed reactor, the glass beads as the experimental material to air as a spout and inflation gas, pilot tube inflatable bed of the maximum allowable inflation velocity range, check the inflatable The Effect of Velocity on the Minimum Spouting Velocity, Bed Pressure Drop and Center Fountain Height of Inflatable Spout Bed. Tracer particles are used to study the effect of aeration velocity on the downward velocity of particles in the wall effect zone. The influence of inflation velocity on the heat transfer coefficient between the wall and the bed was also investigated. The results show that aeration is beneficial to the spout and operation stability of the spout bed, and the aeration is beneficial to the circulation of particles and the heat transfer coefficient between the wall and the bed. Considering the geometrical dimensions of the bed and the physical properties of the gas and the solid, the correlation of the minimum spouting velocity of the pilot-operated aerated spouted bed is obtained according to the experimental data, which provides a reference for its design and operation.