Abstract: The overflow and underflow effluents of a conventional hydrocyclone are discharged into enclosed vessels, so that the operating pressure may be manipulated for each effluent independently of other operating parameters. Each of the effluent vessels is equipped with a source of pressurized gas to form a gas blanket over the effluent at a controllable pressure. Such variable pressures in each vessel, in combination with the pressure of the incoming feed stream, provide the necessary parameters to implement pressure-differential-ratio control, thereby improving the efficiency of separation.

Abstract: A refrigerator with individualized locking drawers is similar in size and shape to a standard refrigerator, with a plurality of drawers in the refrigerator compartment that can be personalized. The drawers have a locking mechanism, a name placard displaying the user's name, a use frequency display, and a spoilage display. A digital control interface on the refrigerator door allows users to register for and manage drawers, and a network connection device allows users to manage their drawer through a website interface or a mobile application. A community storage shelf below the individual drawers and shelves on the inside face of the refrigerator door provides space for large items or community items, and a freezer compartment below the refrigerator compartment provides storage for items that require lower temperatures than the refrigerator compartment.

Abstract: The overflow and underflow effluents of a conventional hydrocyclone are discharged into enclosed vessels, so that the operating pressure may be manipulated for each effluent independently of other operating parameters. Each of the effluent vessels is equipped with a source of pressurized gas to form a gas blanket over the effluent at a controllable pressure. Such variable pressures in each vessel, in combination with the pressure of the incoming feed stream, provide the necessary parameters to implement pressure-differential-ratio control, thereby improving the efficiency of separation.