Methods and systems of operating a pump at an efficiency point during an in-line blending operation. In an embodiment, such a method may include transporting a fluid from a tank to a pump through a first pipe. The method may include discharging, via the pump, the fluid at a specified flow rate through a second pipe. The method may include measuring a flow rate of the first portion of the fluid flowing from the main control valve through the mixing pipe. The method may include measuring a flow rate of the second portion of the fluid flowing through the spillback loop. The method may include determining a current pump efficiency point and operating the pump within a range of percentages of the best efficiency point.

[PROBLEMS] To provide a multistage apparatus used in a liquid-liquid system comprising two liquid phases that do not mix with each other, in which the position of the interface (liquid-liquid interface) of a heavy liquid phase and a light liquid does not fluctuate or else is suppressed, and a method of producing a specific substance using it. [SOLVING MEANS] An apparatus having a connected body of a plurality of adjacent containers or two or more stages installed in a single-piece container in which a plurality of partitions are arranged inside thereof, and a method of producing a specific substance using it. The multistage extraction is performed so as that the position of the interface (liquid-liquid interface) of a heavy liquid phase and a light liquid does not fluctuate or else is suppressed, by using the mechanism in which only the heavy liquid phase communicates in the lower part of the container, the mechanism in which only the light liquid phase communicates in the upper part of the container, or both of them.

[PROBLEMS] To provide a multistage apparatus used in a liquid-liquid system comprising two liquid phases that do not mix with each other, in which the position of the interface (liquid-liquid interface) of a heavy liquid phase and a light liquid does not fluctuate or else is suppressed, and a method of producing a specific substance using it. [SOLVING MEANS] An apparatus having a connected body of a plurality of adjacent containers or two or more stages installed in a single-piece container in which a plurality of partitions are arranged inside thereof, and a method of producing a specific substance using it. The multistage extraction is performed so as that the position of the interface (liquid-liquid interface) of a heavy liquid phase and a light liquid does not fluctuate or else is suppressed, by using the mechanism in which only the heavy liquid phase communicates in the lower part of the container, the mechanism in which only the light liquid phase communicates in the upper part of the container, or both of them.

Methods and systems of operating a pump at an efficiency point during an in-line blending operation. In an embodiment, such a method may include transporting a fluid from a tank to a pump through a first pipe. The method may include discharging, via the pump, the fluid at a specified flow rate through a second pipe. The method may include measuring a flow rate of the first portion of the fluid flowing from the main control valve through the mixing pipe. The method may include measuring a flow rate of the second portion of the fluid flowing through the spillback loop. The method may include determining a current pump efficiency point and operating the pump within a range of percentages of the best efficiency point.

A method and system for forming a liquid mixture utilizes a mixing tank with a tank inlet oriented and configured to create a swirling liquid flow that forms a vortex within the tank. A portion of the swirling liquid is discharged through an outlet formed by an opening in a lower wall of the tank. At least a portion of the opening is offset to one side of a central axis of the lower wall. Liquid is circulated and reintroduced into the tank inlet. A material to be mixed is introduced into the swirling liquid flow within the tank interior to form a liquid mixture.

A method and system for forming a liquid mixture utilizes a mixing tank with a tank inlet oriented and configured to create a swirling liquid flow that forms a vortex within the tank. A portion of the swirling liquid is discharged through an outlet formed by an opening in a lower wall of the tank. At least a portion of the opening is offset to one side of a central axis of the lower wall. Liquid is circulated and reintroduced into the tank inlet. A material to be mixed is introduced into the swirling liquid flow within the tank interior to form a liquid mixture.

A proportioner having a body portion that defines a foam passage and a fluid passage. The proportioner also includes a restrictor assembly having a restrictor disk and an orifice plate having an opening for receiving the restrictor disk. The proportioner can further include a rod member connected to the restrictor disk and a clapper assembly connected to the rod member via a sliding interface. The clapper assembly can be configured to control a flow of the foam concentrate through the foam passage in proportion to a flow of the fire protection fluid through the fluid passage by moving the rod member to vary the distance between the restrictor disk and the orifice plate. The sliding interface can be disposed between a first guide and a second guide, and at least a portion of the restrictor disk is disposed in the opening.

A portable sprinkler device is disclosed herein. The portable sprinkler device is configured to deliver a personalized combination of water, weed killer, lawn fertilizer, and insect control serum. The device may include a wireless control unit capable of communicating with a user interface. The wireless control unit may be configured as a Bluetooth-ready device. The user interface may further include a base station or other portable electronic device. The device is useful for delivering a combined liquid-based lawn treatment solution in a user-friendly manner.

The disclosure herein relates to a microfluidic emulsification device capable of being injection molded. The device may be used for digital droplet polymerase chain reaction (ddPCR). The emulsification device comprises: (a) a cylindrical outer part (4) with two open ends; (b) a cylindrical inner part (1) with a solid bottom and having a circumference sufficient to allow the inner part to be nested within the outer part of the emulsification device, wherein the inner part and the outer part are capable of sliding freely; (c) at least one groove on an interior surface of the outer part or on an exterior surface of the inner part, the groove having a height greater than a gap between the outer part and the inner part when nested; (d) at least one hole (3) in the inner part adjacent to the solid bottom; (e) a radial distribution channel (2) on the interior surface of the outer part or on the exterior surface of the inner part; and (f) a radial nozzle channel at the base of the interior surface of the outer part or at the base of the exterior surface of the inner part.

The disclosure herein relates to a microfluidic emulsification device capable of being injection molded. The device may be used for digital droplet polymerase chain reaction (ddPCR). The emulsification device comprises: (a) a cylindrical outer part (4) with two open ends; (b) a cylindrical inner part (1) with a solid bottom and having a circumference sufficient to allow the inner part to be nested within the outer part of the emulsification device, wherein the inner part and the outer part are capable of sliding freely; (c) at least one groove on an interior surface of the outer part or on an exterior surface of the inner part, the groove having a height greater than a gap between the outer part and the inner part when nested; (d) at least one hole (3) in the inner part adjacent to the solid bottom; (e) a radial distribution channel (2) on the interior surface of the outer part or on the exterior surface of the inner part; and (f) a radial nozzle channel at the base of the interior surface of the outer part or at the base of the exterior surface of the inner part.