摘要:
The present invention refers to a mixing method, a controller and a mixing device for mixing components in a mixing vessel, comprising: - providing a mixing impeller in the mixing vessel; - accelerating the mixing impeller from an inactive state to a rotating state in which the mixing impeller rotates at a first desired speed 10 in a first rotation direction; - rotating the mixing impeller at the first desired speed 10 for a first time t steady,1 in the first rotation direction; - changing the rotation direction of the mixing impeller, so that the mixing impeller rotates in a second rotation direction at a second desired speed 20; and - rotating the mixing impeller at the second desired speed for a second time t steady,2 .
摘要:
A fluid transfer assembly for single use bioreactors includes a fluid transfer housing that can be mounted to the impeller shaft using a bearing that places the fluid transfer assembly directly below the lowest impeller but allows the impeller shaft to spin inside independently of the fluid transfer assembly. A fluid conduit connects the fluid transfer housing to a port in the single use bag wall which allows fluids to be introduced into the sparger and which also helps prevent the fluid transfer assembly from rotating with the impeller shaft.
摘要:
A fluid mixing device (1), for the continuous mixing of two or more fluids, having a mixing chamber which has fluid contact surfaces (110, 115, 123a) defining an internal chamber region (109), a fluid inlet (132), for feeding fluid into the chamber region (109), a fluid outlet (130), for feeding fluid out of the chamber region (109), and a fluid mixer (118) within the chamber region (109) which is capable of inducing mixing of two or more fluids within a mixing region. The mixing chamber is configured so that the dead volume within the chamber region (109) is filled in such a way that the mixing region corresponds to the chamber region (109). A fluid inlet valve for use in the fluid mixing device has entrance and exit aperture sealing means (162, 142) which are adapted to allow passage of fluid respectively into and out of a body portion (135, 158) of the valve, according to a specified pressure differential between the pressure externally of the entrance aperture (159) and the pressure externally of the exit aperture (136).
摘要:
A method and apparatus for mixing liquids or liquids (9) with particles (8) without the aeration of the liquid. The liquid and/or particles (8) opposed in a vessel (2) having an upper end (4) and a lower end (5) and a containing wall (3) extending between the upper and lower ends. A mechanical rotating means (6) disposed adjacent the upper end (4) and submerged in the liquid (9) is used to induce a rotational flow directed radially outward from a central region of the vessel towards the containing wall (3) to establish a swirling flow. The flow is characterised by an outer annular region (11) of moderate rotational flow adjacent the containing wall (3) moving from the upper end (4) toward the lower end (5), an inward flow adjacent the lower end of the vessel (2) and an inner core (12) of rotational flow about the central region of the vessel (2). The inner core flow (12) moves from the lower end (5) toward the upper end (4) and extends substantially from adjacent the lower end (5) of the vessel to the mechanical rotating means (6).
摘要:
An impeller for an agitator or the like is disclosed. The impeller has a central component which is operable to rotate when the impeller is in use, and at least one blade which is initially formed separately from the central component but which is mounted to the central component when the impeller is assembled. Each blade is mounted to the central component in such a way that, except for the blade itself, when the blade is mounted to the central component, other parts and components involved in mounting the blade to the central component do not create substantially any shaped features which give rise to voids or low-pressure regions in their wake when the impeller spins.
摘要:
A fluid mixing system (164, 422, 430) includes a container (14, 16, 18B, 18) bounding a compartment (28) and extending between a first end (191, 405, 432, 450, 464, 502, 512, 58, 70, 84) and an opposing second end (192, 407, 434, 452, 466, 504, 514, 60, 72, 86). An elongated, flexible first drive line (44A, 44B, 44) and second drive line (44B) are disposed within the compartment (28) of the container (14, 16, 18B, 18) and are rotatable therein. At least one tie (45A, 45) extends between the first drive line (44A, 44B, 44) and the second drive line (44B) so as to maintain at least a portion of the first drive line (44A, 44B, 44) and the second drive line (44B) at lateral spaced apart positions within the compartment (28). An impeller (46A, 46B, 46C, 46) or other mixing element (400A, 400) can be coupled to the drive lines (44A, 44, 45A).
摘要:
A fluid mixing device (1), for the continuous mixing of two or more fluids, having a mixing chamber which has fluid contact surfaces (110, 115, 123a) defining an internal chamber region (109), a fluid inlet (132), for feeding fluid into the chamber region (109), a fluid outlet (130), for feeding fluid out of the chamber region (109), and a fluid mixer (118) within the chamber region (109) which is capable of inducing mixing of two or more fluids within a mixing region. The mixing chamber is configured so that the dead volume within the chamber region (109) is filled in such a way that the mixing region corresponds to the chamber region (109). A fluid inlet valve for use in the fluid mixing device has entrance and exit aperture sealing means (162, 142) which are adapted to allow passage of fluid respectively into and out of a body portion (135, 158) of the valve, according to a specified pressure differential between the pressure externally of the entrance aperture (159) and the pressure externally of the exit aperture (136).
摘要:
Hydrophobic particles such as coal and hydrophobized mineral fines can be readily separated from hydrophilic impurities by forming agglomerates in water using a hydrophobic liquids such as oil. The agglomerates of hydrophobic particles usually entrap large amounts of water, causing the moisture of the recovered hydrophobic particles to be excessively high. This problem can be overcome by dispersing the hydrophobic agglomerates in a hydrophobic liquid that can be readily recycled. The dispersion can be achieved using specially designed apparatus and methods that can create a turbulence that can help destabilize the agglomerates in a recyclable hydrophobic liquid and facilitate the dispersion.