Abstract:
The invention relates to a stirred tank reactor for gas-liquid mass transfer in a slurry. The reactor includes a reactor tank (1) having a first volume (V 1 ), a drive shaft (2) that extends vertically in the reactor tank, a motor (3) for rotating the drive shaft (2), a main impeller (4) which is a downward pumping axial flow impeller attached to the drive shaft (2) to create a main flow pattern in the reactor tank, and a gas inlet (5) arranged to supply gas into the reactor tank (1) to be dispersed to the liquid. The reactor includes a mechanical gas sparging apparatus (6) comprising a dispersion chamber (7) having a second volume (V 2 ) which is substantially smaller than the first volume (V 1 ) of the reactor tank (1), the dispersion chamber being arranged coaxial with the drive shaft (2), and the gas inlet (5) being arranged to feed gas into the dispersion chamber (7), and mixing means (8, 9, 10, 11, 12) arranged within the dispersion chamber (7) for mixing the gas into liquid by dispersing the gas to fine bubbles before the bubbles enter the main flow pattern. The mixing power per unit volume inside the dispersion chamber (7) is significantly larger than the mixing power elsewhere in the reactor.
Abstract:
The present invention provides a method and system for providing on-site electrical power to a fracturing operation, and an electrically powered fracturing system. Natural gas can be used to drive a turbine generator in the production of electrical power. A scalable, electrically powered fracturing fleet is provided to pump fluids for the fracturing operation, obviating the need for a constant supply of diesel fuel to the site and reducing the site footprint and infrastructure required for the fracturing operation, when compared with conventional systems. The treatment fluid can comprise a water- based fracturing fluid or a waterless liquefied petroleum gas (LPG) fracturing fluid.
Abstract:
Nach der Erfindung wird an einer Extrusionsanlage mit einem Planetwalzenextruder oder Planetwalzenextruderabschnitt oder Planetwalzenextrudermodul (22, 23, 24) die Drehzahl der Zentralspindel für eine Feindispergierung um ein Mehrfaches der sonst bekannten maximalen Drehzahlen erhöht.
Abstract:
A blender base is generally described. The blender base includes a base frame. An outer shell may be connected to the base frame. A motor housing is supported by the base frame and positioned inside the outer shell. The motor housing is isolated from direct connection with the outer shell to reduce the transfer of noise and vibration from the motor to the outer shell.
Abstract:
The present invention is a method and apparatus (120) for mixing viscous fluids. The mixing apparatus comprises a cage located at the end of a shaft (122). The cage comprises a support, such as central circular disc (124) with an outer edge and top and bottom sides. A number of vanes (126) are mounted for rotation with the support. In one arrangement, the vanes (126) extend from one or both sides of the disc (124), the vanes (126) spacedly located near the outer edge of the plate. The method comprises rotating the mixing apparatus in a container of fluid.
Abstract:
Whisk beater, particularly for whites of eggs beaten stiff, of the type comprising two whisks rotating inside a fixed vat. According to the invention, the whisks (22) are mounted in a case (7) rotating at low speed inside the vat (B), the case (7) being sealed only when disassembled. Application: possibility of washing the whisk beater in a machine; operation in a closed vat.
Abstract:
The present set of embodiments relate to a bioproduction system, method, and apparatus for creating a scalable bioreactor system. Specifically, the present set of embodiments enable the determination of bioreaction performance characteristics of a commercial scale by matching operational parameters between a small test scale bioreaction to that of a commercial scale bioreaction. The system and methods do not rely on simply making bioreactor apparatuses across scales the same dimensionally which would not account for differences in fluid dynamic properties between very small to very large volumes, but requires tuning of a variety of systems (mixing assembly, sparger system, and headspace airflow system) in conjunction with one another to achieve predictive outcomes.