含油污水气浮旋流装置结构优化与性能试验

Structural Optimization and Performance Test of Air-sparged Hydrocyclone for Water De-oiling

为了大幅度减少含油污水分离设备空间占用并降低生产成本,结合旋流和气浮技术研发出紧凑高效型气浮旋流分离装置。通过建立含油污水中分散颗粒的浮升模型,完成气浮旋流装置关键部件的结构设计,依据该装置浮升特性分析和现场性能试验,对其结构和操作参数进行探索和优化。研究结果表明,油滴粒径的增大使得所需的罐体内径减小,而流量的提升会使得入口管径增大,为除掉小粒径油滴应尽量降低表面水力负荷率;装置的除油率随回流量的增加先提升后下降,并随气泡发生量的增大而逐步提高,且在流量波动时也能够保持在80%左右;选取操作参数时需综合油滴与气泡碰撞、粘附的概率及泵耗等因素。

To minimize the oily water efficiency air-sparged hydrocyclone device separation equipment footprint and reduce the costs, a compact, high is developed by the cyclonic separation and air-sparge technology. The structural design of the key component of air-sparged hydrocyclone device is completed based on an established floating model of dispersed particles in oily water. The structure and operating parameters of the device is explored and optimized according to the lifting characteristics and field performance test of the device. The results show that the larger the oil droplet size is, the smaller the inner diameter of the tank is required. A larger inlet diameter will be needed with the increase of flow rate. To remove the small size droplets, the surface hydraulic loading rate should be minimized. The de-oil efficiency of the device increases with the increase of recirculating rate, but de- creases when the recirculating rate reaches to a certain level. The de-oiling efficiency increases with the increase of bubble generation amount, and would maintain around 80% with the fluctuation of the flow rate. Factors like colli- sion of oil droplets and bubbles, the probability of adhesion and pump consumption need to be considered in selec- ting the operating parameters.