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针对U型阀在常温常压下的流态化排料状态,建立了以力平衡为基础的数学模型,用于计算该状态下的排料速率,并在循环流化床系统中用平均粒径为81.9m的石英砂颗粒进行流态化排料实验,对数学模型进行验证.结果表明,排料室表观气速为1.52.5Umf(Umf为最小流化速率)时,排料速率随排料室表观气速增大而增大,U阀处于流态化排料状态.不同条件下用模型对排料室压降和排料速率进行计算,与实验数据的平均计算误差排料室压降为2%,排料速率为7%,计算值和实验值吻合较好.
Aimed at the fluidized discharge state of U-valve under normal temperature and pressure, a mathematical model based on force balance was established to calculate the discharge rate in this state. In the circulating fluidized bed system, The results show that when the apparent gas velocity in the discharge chamber is 1.52.5Umf (Umf is the minimum fluidization velocity), the discharge rate of the quartz sand particles with the diameter of 81.9m The apparent air velocity of the discharge chamber increases and increases, and the U valve is in the state of fluidized discharge.The pressure drop and discharge rate of the discharge chamber are calculated with the model under different conditions, and the error of the average calculation of the experimental data Room pressure drop of 2%, the discharge rate of 7%, the calculated value and the experimental value is in good agreement.