Wherein, recent years, hydrocyclones have been witnessed a rising worldwide popularity owing to their irreplaceable merits in solid-li- quid, gas-liquid, liquid-liquid, gas-liquid-solid, gas-liquid-liquid, and solid-liquid-liquid separation, such as small cut sizes (≥ 2 μm, even submicron), high separation efficiency, low en- ergy consumption, no moving parts, wide operating range, low cost, and small volume. Specifically, to date, hydrocyclones have been