毕业设计动力波清洗法收车间空气中的丙酮.docVIP

动力波清洗法回收车间空气中的丙酮 摘要：动力波清洗技术是一种先进气体净化技术，通过气液对冲形成高速湍流的泡沫区，由于泡沫区内液体表面积大且更新迅速，强化了气液传热、传质过程，达到气相高效净化的良好效果。此技术广泛应用于原料气净化、尾气处理及空气净化等领域。 使用自制的动力波实验装置，通过装置复合性能、气速与压降、驻区与气液比等关系的测定，确定了装置正常操作的条件。气速在0.953~2.069m/s范围内，液气比在0.0155～.0274范围内较为适宜。以空气通过丙酮溶液模拟车间含丙酮空气，对装置的总传质系数、最佳处理效率进行测定，结果表明：随气体速度增加，体积总传质系数KGa增大，液气比增加，体积总传质系数KGa减小。当以含丙酮水循环操作时，随溶液中丙酮浓度增高，体积总传质系数KGa减小。处理效果随液气比的增大、含丙酮水溶液中浓度升高而降低。 为提高动力波洗涤器的清洗效率，在吸收液中分别添加了表面活性剂，丙酮稳定剂，及同时添加表面活性剂和丙酮稳定剂进行实际清洗，结果表明：表面活性剂虽然在一定程度上增加了装置流体力学的操作弹性，对气体净化效果不佳；丙酮稳定剂对气体净化有效果，但浓度增加到一定值后，效果会下降，当稳定剂浓度为处理液的万分之1.36，循环液丙酮浓度为0.5%时，吸收率比正常吸收提高12%，总效率可达50%；同时添加表面活性剂和丙酮稳定剂，实际清洗与清水效果相近。 通过实验、装置运行进一步明确：装置的截面、高度、喷嘴的截面、喷水量、液泵流量、气泵流量等之间要协调好，才能使装置达到最佳状态。实验结果证明动力波清洗技术是一种十分高效的丙酮回收方法；同时，此装置的参数及运行结果为工业生产的工艺设计、设备设计奠定了充足的基础。 关键词：动力波清洗，液气比，丙酮回收，传质性能 Treatment Acetone from Air of Workplace with Dynawave Cleaning Method Abstract：The Dynawave cleaning technology as an advanced gas purification technology is widely used in the feed gas purification, gas treatment, air purification and other fields.The high-speed turbulence of the froth was formed through gas - liquid hedge rapidly, and the large surface area of the liquid which is quickly updated in the foam area, enhances the process of the gas-liquid heat and mass transfer, and makes the gas phase purificate well. In order to determine the conditions for the normal operation of the device, the relationship of the composite performance of device, gas velocity and pressure drop, garrison and gas-liquid ratio are measured using the homemade Dynawave experimental device.It is more appropriate for gas velocity in the range of 0.953~2.069m/s, and the liquid-gas ratio in the range of 0.0155 to 0.0274. In order to measure the optimal treatment efficiency and the overall mass transfer coefficient of the device, the workshop acetone air was simulated by the air through the acetone solution.The results show that with the gas velocity increases, the volume overall mass transfer coefficient becomes larger, with The liquid-gas ratio i