Centrifugal Separator Interface Sensing for Active Phase Control
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Solution Overview
Problem
Existing centrifugal separators face challenges in accurately controlling the interface position between separated phases, especially under varying conditions such as temperature, density, and flow rate, due to passive control methods.
Innovation Solution
The centrifugal separator incorporates an improved interface level sensor with capacitive sensor elements and a solid transmission window for wireless communication, allowing for precise detection and transmission of interface positions to a receiver outside the centrifuge bowl.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If passive control by gravity disc and level ring is used, then device complexity is reduced, but interface position control reliability deteriorates under varying conditions
Solution Approach 1:
The patent implements a feedback control system where a level sensor detects the interface position between liquid phases, and this information is fed back to a control unit that adjusts the gravity disc position accordingly. This closed-loop feedback mechanism ensures reliable interface position control under varying operational conditions while maintaining reasonable device complexity.
Solution Approach 2:
The patent transitions from static passive control (fixed gravity disc and level ring) to dynamic active control where the gravity disc position can be adjusted in real-time based on detected interface position. This dynamic adjustment capability maintains control reliability when temperature, density, or flow rate conditions change during operation.
2Loss of information
If wireless transmission means is added to the centrifugal separator, then information transmission capability is improved, but device complexity increases
Solution Approach 1:
The patent replaces potential mechanical or wired transmission systems with wireless transmission means (such as radio frequency or Bluetooth modules). This allows interface position information to be transmitted to external receivers without physical connections, reducing mechanical complexity while improving information transmission capability.
Solution Approach 2:
The control unit and level sensor are designed to serve multiple functions: they not only detect interface position but also process the data and enable wireless transmission. This multi-functionality approach adds transmission capability without proportionally increasing overall device complexity, as existing components are utilized for multiple purposes.
3Loss of information
If solid transmission window is used for wireless signal transmission, then signal transmission capacity is improved, but manufacturing precision requirements increase
Solution Approach 1:
The solid transmission window acts as an intermediary element that allows wireless signals to pass through the centrifugal separator bowl wall. By using a dedicated transmission window with known electromagnetic properties, the system achieves reliable signal transmission while the window can be positioned at a specific location without requiring extreme precision, as it serves as a controlled intermediary for signal passage.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enables active control of the interface level, improving the separation quality by allowing for real-time adjustments based on detected interface positions, even under varying operational conditions.
Implementation Method 1
The interface level sensor may comprise at least one capacitive sensor element
Implementation Method 2
said solid transmission window having a higher transmission capacity for the wireless communication signal than the material of the centrifuge bowl
Implementation Method 3
the drive member is configured to rotate the rotatable part in relation to the frame around an axis of rotation (X)
Implementation Method 4
During operation, liquid mixture to be separated is introduced into a rotating bowl and heavy particles or denser liquid, usually water, accumulates at the periphery of the rotating bowl whereas less dense liquid accumulates closer to the central axis of rotation
Data Source
AI summary
A centrifugal separator for separating at least one liquid phase from a liquid feed mixture includes a frame, a drive member and a rotatable part. The drive member is configured to rotate the rotatable part in relation to the frame around an axis of rotation. The rotatable part includes a centrifuge bowl enclosing a separation space. The separation space includes surface enlarging inserts for increasing the separation performance of the centrifugal separator. The centrifugal separator includes an interface level sensor for detecting at least one interface between separated phases in the centrifuge bowl during operation of the centrifugal separator; and a transmission configured for wireless transmission of information of the at least one interface to a receiver outside of the centrifuge bowl. The centrifugal separator includes a solid transmission window arranged in the wall of the centrifuge bowl, the solid transmission window having a higher transmission capacity for the wireless communication signal than the material of the centrifuge bowl.