摘要:
A mixing method, a controller and a mixing device for mixing components in a mixing vessel are provided. The mixing method includes 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 in a first rotation direction; rotating the mixing impeller at the first desired speed for a first time tsteady,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; and rotating the mixing impeller at the second desired speed for a second time tsteady,2.
摘要:
The invention relates to a treatment plant and a method for controlling such a treatment plant suitable for treatment of wastewater. The treatment plant comprises a circulation channel (2) housing said liquid, a submersible flow generating machine (6) arranged in the circulation channel (2) and generating a liquid flow along the circulation channel (2), and a control unit (7) that is operatively connected to said flow generating machine (6), wherein the flow generating machine (6) is driven in operation by said control unit (7). The method being characterized by the steps of: driving the flow generating machine (6) at a nominal speed, decreasing the rotational speed of the flow generating machine (6) from the set nominal speed, detecting the rotational speed at which the torque of the flow generating machine (6) is equal to a predetermined threshold, and determining the flow velocity of the liquid at the flow generating machine (6) based on a predetermined relationship between the rotational speed of the flow generating machine (6) and the flow velocity of the liquid.
摘要:
The invention relates to a method for operating a stirring device and a fermenter. The fermenter (1) is filled with a substrate (7), and a stirring device (10) which is controlled by a controller (50) is arranged in the fermenter (1). The following method steps are carried out: a) a target load curve (60) is stored in the controller (50); b) the controller (50) specifies a target rotational speed (61); c) the controller (50) drives the stirring device (10) at an actual rotational speed (71) which corresponds to the specified target rotational speed (61); d) the controller detects an actual measurement value (81) which characterizes the torque of the stirring device (10) at the actual rotational speed (71); e) the controller (50) derives an actual characteristic value (91) for the torque applied to the stirring device (10) from the actual measurement value (81); f) the controller (50) compares the derived actual characteristic value (73) with the target characteristic value (63) for the substrate (7), said target characteristic value resulting from the target load curve (60) at the specified target rotational speed (61); and g) the controller (50) controls the stirring device (10) dependent on the result of the comparison.
摘要:
A method and a system for condition monitoring of a homogenizer are provided. After receiving a first pressure data from a first pressure sensor indicating a product pressure upstream a homogenizing device, and a second pressure data from a second pressure sensor indicating a counter pressure used for holding a forcer in said homogenizing device in position, these can be compared with a first pressure reference data and a second pressure reference data associated a properly working homogenizer such that the condition of the homogenizer can be determined.
摘要:
A coffee processor having a grinder and a densifier is disclosed. The densifier comprises an elongated housing (260) having a mixing chamber (213) configured to receive ground coffee. The mixing chamber has an inlet end opposite a discharge end. The discharge end has a discharge door. The densifier has a mixing shaft (250) driven by a mixing motor (220), the mixing shaft (250) extending along a longitudinal length of the mixing chamber (213). The densifier has a plurality of pins (231, 232, 233, 234) fixed to the mixing shaft (250) and configured to agitate a bed of coffee within the mixing chamber (213). An automatic coffee density control system is also disclosed. A mixer motor load sensor is signal connected to a controller and configured to report a mixer motor load to the controller. The controller is configured to signal a discharge door actuator to move the discharge door a predefined distance to increase or decrease the mixer motor load when the mixer motor load sensor reports a mixer motor load value that is outside a predefined mixer motor load operating range or setpoint.