Membrane separation device

A membrane separation device, comprising:

• a housing having an arc-shaped inner surface, the housing being provided with at least one medium inlet, at least one medium outlet used for discharging a separated medium, and at least one discharge port for discharging a remaining medium;
• a rotor provided in the housing, wherein a center of the rotor is not coincident with a center of the housing, the center of the rotor rotates about the center of the housing during the rotation of the rotor, an external gear is fixed on a drive shaft at the center of the housing, the rotor is provided with an internal gear at the center thereof, the external gear is engaged with the internal gear, and the external gear has fewer teeth than the internal gear;
• the rotor being provided with at least two contact ends on an outer surface thereof, the at least two contact ends being constantly in sliding contact with the inner surface of the housing, the outer surface of the rotor and the inner surface of the housing forming sealed separate cavities between adjacent contact ends, the separate cavities being separated by the contact ends,
• wherein an inside of the rotor is hollow, a hollow part inside the rotor is used as a medium storage chamber and the medium storage chamber of the rotor is divided into two parts by a divider:
• a first medium storage chamber for storing the separated medium and a second medium storage chamber for storing the remaining medium;
• separation chambers provided inside the rotor as a part of the rotor, a respective one of the separation chambers being defined between each adjacent pair of contact ends, each of the separation chambers being provided with a membrane therein for dividing the separation chambers into an inner part and an outer part;
• respective one-way valves provided on outer walls of the separation chambers for communicating with the separate cavities;
• medium outlets provided on inner walls of the separation chambers to connect respective inner parts of the separation chambers to the first medium storage chamber, the first medium storage chamber being in communication with the at least one medium outlet on the housing;
• conduits extending from the outer parts of the separation chambers to connect respective outer parts of the separation chambers to the second medium storage chamber, the second medium storage chamber being in communication with the at least one medium discharge port on the housing;
• wherein during a rotation of the rotor, a medium entering the separate cavities through the medium inlets on the housing enters the outer parts of the separation chambers through the one-way valves by pressure,
• separated medium passes from the outer parts of the separation chambers through the membranes into the inner parts of the separation chambers, passes through the medium outlets provided on the inner walls of the separation chamber into the first medium storage chamber, and then exits through the at least one medium outlet on the housing, and
• remaining medium passes from the outer parts of the separation chambers through the conduits, enters the second medium storage chamber, and is then discharged through the at least one medium discharge port on the housing.