旋流诱导介质振荡再生增强含油污水微通道分离

受微通道分离介质再生后截滤残留污染物影响，常规微通道分离效率持续衰减，成为抑制微通道分离广泛高效应用的关键瓶颈。通过开发旋流振荡再生单元，研究了旋流振荡再生强度和振荡再生结构对微通道分离装置过滤介质再生效率的影响，由此集成研发沸腾床分离器，考察了装置对实际含油污水的分离效率，并分析了微通道振荡再生对沸腾床分离的强化原理以及装置的分离经济性。结果表明，当再生强度为5.0 L·(s·m²)⁻¹时、再生15 min后采用轴向振荡再生结构，沸腾床分离器达到最佳再生工况。在最佳再生工况下开展10 m³·h⁻¹实际含油污水连续处理实验，针对油质量浓度为30~200 mg·L⁻¹、悬浮物质量浓度为25~200 mg·L⁻¹的来水，装置出水平均油分和悬浮物质量浓度分别降至11.4 mg·L⁻¹和23.5 mg·L⁻¹，并可在来水最高油质量浓度和悬浮物质量浓度接近50 000 mg·L⁻¹的冲击工况下，确保出水平均油分和悬浮物质量浓度降至15.9 mg·L⁻¹和29.8 mg·L⁻¹。利用沸腾床分离器再生结构中旋流诱导的过滤介质表界面污染物振荡运动，分离过程中截滤残留的油分和悬浮物等污染物被及时脱附，实现颗粒介质表界面彻底更新，确保装置长周期稳定运行。以200 m³·h⁻¹规模实际含油污水处理为例，沸腾床分离工艺相对涡凹气浮和溶气气浮的组合工艺，可完全取消化学絮凝药剂消耗且不产生化学浮渣，且具有显著的经济环保效益。

Hydrocyclone-induced oscillation regeneration of filter medium for enhanced microchannel separation of oily wastewater

Affected by the residual pollutants filtered after the regeneration of the microchannel separation medium, the separation efficiency of conventional microchannels separator continues to decline, which has become a key bottleneck inhibiting the widespread and efficient application of microchannel separator. A hydrocyclone oscillation regeneration unit was developed. The influence of the hydrocyclone oscillation regeneration intensity and the oscillating regeneration structure on the regeneration efficiency of the filter medium of the microchannel separation device was studied, and the ebullated bed separator was integrated and developed to investigate the separation efficiency of the device for actual oily wastewater, and to analyze the enhancement principle of the microchannel oscillation regeneration for the ebullated bed separation and the separation economy of the device. The results showed that when the regeneration intensity was 5.0 L·(s·m2)−1, the regeneration time was 15 min and the axial oscillating regeneration structure was adopted, the optimal regeneration conditions occurred for the ebullated bed separator. The continuous treatment experiment of 10 m3·h−1 actual oily wastewater was carried out under the optimal regeneration conditions. For the influent water with an oil content of 30~200 mg·L-1 and a suspended solids content of 25~200 mg·L−1, the average oil content and the suspended solids content in the effluent of the device decreased to 11.4 mg·L−1 and 23.5 mg·L−1, respectively. When the maximum oil and suspended solids contents in the influent were close to 50 000 mg·L−1, it can also ensure that the average oil and suspended solids content in the effluent could decrease to 15.9 mg·L−1 and 29.8 mg·L−1, respectively. Using the oscillating motion of the pollutants on the surface of the filter medium induced by the hydrocyclone in the regeneration structure of the ebullated bed separator, the pollutants such as oil and suspended solids remained in the filtration during the separation process could be removed in time, and the surface and interface of the particle medium could be completely regenerated to ensure a long-term stable operation of the device. Taking the actual oily sewage treatment at a scale of 200 m3·h−1 as an example, the ebullated bed separation process can abolish the consumption of chemical flocculation agents completely and does not produce scum, compared with the cavitation air flotation and dissolved air flotation, and has significant environmental benefits.