The present invention is a device and a method that combines a carbon disulfide-releasing chemical with a low pH organic or inorganic acid to produce a carbon disulfide-containing fluid at or near the point of injection that minimizes or eliminates the possible exposure of carbon disulfide to workers and the environment. In one particular embodiment a positive displacement injection pump injects the carbon disulfide-containing fluid into a crude oil system for treating crude oil transmission lines and in downhole tubulars to remove paraffin deposits. The device uses a unique in-line motion mixer to mix two fluids. The device is electronically controlled locally and remotely with the system operating data displayed locally and transmitted remotely. The paraffin treating carbon disulfide-containing fluid and supplemental chemicals dissolve, disperse and remove paraffin deposits.

An electromagnetic rotary drive includes a contactlessly magnetically drivable rotor that is coil-free and free of permanent magnets and that includes a magnetically effective core, and a stator by which the rotor is contactlessly magnetically drivable about a desired axis of rotation in the operating state. The stator has a plurality of coil cores of which each includes a bar-shaped longitudinal limb extending from a first end in a direction in parallel with the desired axis of rotation up to a second end, all the first ends being connected by a reflux of windings generate an electromagnetic rotational field of which each surrounds one of the longitudinal limbs. The coil cores include a plurality of permanent magnets by which a permanent magnetic pre-magnetization flux can be generated.

A method is provided for monitoring a flow behavior of mixed components without requiring additional instrumentation or sampling. The method is carried out by determining ratios of the power required to rotate a mixing impeller at different rotational speeds and then comparing the ratios. Characteristics about the mixed components are determined based on differences between the ratios.

Embodiments of the method disclosed regard use of a torque sensor (e.g., transducer) and using the measured torque to detect the different fluid and mixing properties, conditions, and abnormalities in a mixing process. The torque produced in the mixing process relates to different fluid properties such as viscosity and density. It also relates to different mixing conditions such as presence of obstacles and changes or issues with gas sparging. Moreover, torque measurements enable determination of power transmitted to fluid by actual measurement, in contrast to using solely empirical impeller power number and speed, and allowing for actual mass transfer determination (i.e., gas transfer calculations).

A culture medium preparator includes a cylindrical vessel that terminates at the low part in a substantially hemispherical cap, a lid and a stirrer placed in the vessel. The stirrer includes a vertical tube placed in the center of the vessel, a plurality of blades put into rotation about the tube and magnetic masses at the periphery so that they are placed in proximity to the internal wall of the vessel. The preparator furthermore includes a magnetic ring in rotation about the internal wall at the same height as the magnetic masses. The magnets attract the magnetic masses, the magnetic ring being moved in rotation by a motor. In this way, the stirrer is driven in rotation without requiring mechanical elements placed inside the vessel, the absence of such elements facilitating the cleaning.

An apparatus for agitating liquid foodstuff, comprising a whisk that includes a magnetic rotor of a brushless electromotor assembly, and a main body including a liquid foodstuff container in which the whisk is receivable such that it is rotatable around a rotation axis thereof, and a stator of the electromotor assembly. The stator is configured to electromagnetically drive the rotor in rotation, and includes at least one magnetic sensor configured to provide a signal that reflects positional changes of the magnetic rotor relative to the magnetic sensor. The main body also includes a controller configured to detect an initial, manually effected rotational movement of the whisk around its rotation axis from the signal of the magnetic sensor, and, once such initial movement of the whisk is detected, to operate the apparatus independent of said initial, movement.

A disposable container, such as a deformable bag, for a fluid, having one or more inlets and one or more outlets and an impeller assembly within the container to cause mixing, dispersing, homogenizing and/or circulation of one or more ingredients contained or added to the container. The impeller assembly has a protective hood surrounding at least a portion of the moveable blades or vanes of the impeller assembly and being above at least a portion of the blades or vanes. The hood surrounds the blades or vanes and arcs over the height of the blades or vanes. The hood is shaped in a dome shape or semi-spherical shape that is around and above the impeller blades and acts as a protector for the container surface against the impeller assembly both during shipping and storage as well as when in use, particularly at lower liquid levels.

An apparatus (10) receives an at least partially flexible vessel (14) adapted for receiving a fluid. The apparatus (10) may include an overpack (12) and a partition (16) removably positioned in an interior of the overpack (12). The partition (16) may extend generally transverse to a sidewall (12b) and generally aligned with a floor (12c) of the overpack (12) to form a compartment for receiving the vessel (14). The partition (16) may also form part of a carrier (17) for the vessel (14). A filling station for filling containers (10) is also disclosed, as are related methods.

A device (10), for receiving fluid, having a block (12) which comprises: a chamber (14) comprising a top and a bottom; and a chamber outlet (20) at the bottom of the chamber (14). The block (12) further comprises a magnetic stirrer (30) suspended in the chamber (14), wherein the magnetic stirrer (30) terminates above the bottom of the chamber (14), and is rotatably supported inside the chamber (14). The block (12) further comprises a microchannel (26) fluidly connected to the chamber (14) via the chamber outlet (20). The microchannel (26) may be fluidly connected to a downstream reservoir (24), and an upstream reservoir (22). The device (10) is suited for mixing a bead/cell suspension and an oil-based fluid in the microchannel (26) such that they form an emulsion which comprises a plurality of droplets, wherein at least one of the droplets encapsulates a bead/cell.

A machine (1) for processing a liquid food substance incorporates: a container (10) delimiting a cavity (10) for containing said liquid food substance; an impeller (20) for driving the liquid food substance in the container (10); a motor (30) for driving the impeller (20); a motor chamber (40) for containing the motor (30); and a means for evacuating heat from the motor chamber (40). Such means comprises one or more movable members (50) that are driven by the motor (30) and that are configured to circulate air (2a,2b) in the motor chamber (40) to evacuate heat therefrom.