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对脉冲萃取柱的空气脉冲旋转阀产生的空气脉冲发生过程进行了分析,给出了其充气和排气过程特征,得到脉冲腿内液面在空气脉冲作用下随时间变化的理论模型,并将理论计算结果与大型空气脉冲旋转阀产生的脉冲压力变化及在其作用下在直径0.3m、高5.6m无筛板脉冲柱中产生的液体运动的实验结果进行了对比.结果表明,空气脉冲旋转阀充放气时间很短,充气时间约0.2s,放气时间不超过0.05s,加压空气通过旋转阀后产生接近梯形波的空气脉冲压力,脉冲柱内液面随时间变化曲线为类似正弦形,理论模型计算与实验结果符合很好,验证了模型的可靠性.
The process of air pulse generated by air pulse rotary valve in pulse extraction column was analyzed. The characteristics of the process of air inflation and exhaust were given. The theoretical model that the liquid level in pulse leg changed with time under air pulse was obtained. The theoretical calculation results are compared with the experimental results of the pulse pressure generated by a large air pulse rotary valve and the liquid movement produced in the pulsating column with a diameter of 0.3m and the height of 5.6m without sieve plate under the action of the experimental results. The results show that the air pulse rotation Valve filling and evacuation time is very short, inflation time is about 0.2s, deflation time does not exceed 0.05s, pressurized air through the rotary valve to produce air pulse pressure close to trapezoidal wave, the pulse column surface with time curve of similar sinusoidal The theoretical and theoretical models are in good agreement with the experimental results, which verify the reliability of the model.