Multi-stage circulating separation equipment

A multi-stage circulating separation equipment comprising:

• a tank including an upstream end and a downstream end, wherein the tank includes an interior divided by a plurality of partitioning boards into a crude liquid chamber and a plurality of treatment liquid chambers, wherein the crude liquid chamber and the plurality of treatment liquid chambers are arranged from the upstream end towards the downstream end;
• a plurality of cyclones each including at least one discharge port and at least one return port, wherein the discharge ports of the plurality of cyclones intercommunicate with the plurality of treatment liquid chambers, wherein the plurality of treatment liquid chambers includes, from the upstream end towards the downstream end in sequence, a first treatment liquid chamber, a second treatment liquid chamber, a third treatment liquid chamber, and a fourth treatment liquid chamber, and wherein the plurality of cyclones includes a first cyclone whose discharge port is aligned with the second treatment liquid chamber, a second cyclone whose discharge port is aligned with the third treatment liquid chamber, and a third cyclone whose discharge port is aligned with the fourth treatment liquid chamber;
• a plurality of pressurizing pumps;
• and
• a pipeline module connected to the tank, the plurality of cyclones, and the plurality of pressurizing pumps, wherein a respective pressurizing pump closer to the upstream end pumps a fluid in the tank into an associated cyclone to urge a fluid with a relatively larger specific gravity to flow through the discharge port of the associated cyclone into an associated treatment liquid chamber, and the fluid with the relatively larger specific gravity is pumped by a next pressurizing pump to a next cyclone, thereby successively delivering the fluid with the relatively larger specific gravity towards the downstream end, and wherein a fluid with a relatively smaller specific gravity flows through the return port of the associated cyclone towards the upstream end and into the tank for continuous circulation.