Centrifugal Separator High-Speed Cleaning Phase
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Solution Overview
Problem
Centrifugal separators used to clean crankcase gases from internal combustion engines often experience clogging between separation discs, which decreases their separation performance, necessitating a solution to prevent and address clogging.
Innovation Solution
A centrifugal separator with a control unit that rotates the separation members at a higher speed during a designated cleaning phase to dislodge and remove clogging contaminants, utilizing increased centrifugal forces to prevent and remove clogging between separation members.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the separator operates continuously at normal speed for gas separation, then separation performance is maintained, but clogging occurs between separation discs over time
Solution Approach 1:
The separator operates in periodic cycles alternating between normal separation mode and cleaning mode. During cleaning mode, the rotation speed is temporarily increased to dislodge clogging contaminants from between the separation discs. This periodic switching resolves the contradiction by maintaining separation performance through regular cleaning intervals while using high-speed rotation to remove harmful clogging deposits.
Solution Approach 2:
The rotation speed parameter is dynamically changed between two states: normal operating speed for separation and elevated cleaning speed for removing clogging. The control unit monitors separation performance and adjusts the rotation speed accordingly, switching to higher speeds when clogging is detected and returning to normal speeds when performance is restored, thereby maintaining reliable separation while eliminating clogging.
2Ease of repair
If the rotation speed is increased to remove clogging, then cleaning effectiveness improves, but energy consumption increases
Solution Approach 1:
The high-speed cleaning operation is performed periodically rather than continuously. The control unit activates elevated rotation speeds only when clogging is detected or at predetermined intervals, maintaining cleaning effectiveness while minimizing energy consumption by limiting high-speed operation to brief cleaning cycles rather than continuous operation.
Solution Approach 2:
The rotation speed parameter is dynamically adjusted based on operational needs. The control unit increases speed only when cleaning is required and returns to normal operating speed during separation phases, optimizing the balance between cleaning effectiveness and energy consumption by using high power only when necessary.
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
The solution effectively prevents and removes clogging, maintaining the separator's performance by using a temporary increase in rotational speed to dislodge contaminants, thereby ensuring continuous efficient separation of oil and gas.
Implementation Method 1
rotating the rotating member at a higher speed during a designated cleaning phase to dislodge and remove clogging contaminants, utilizing increased centrifugal forces to prevent and remove clogging between separation members
Implementation Method 2
a mixture of fluids having different densities may be separated from one another through use of a centrifugal separator
Data Source
AI summary
A centrifugal separator for cleaning gas containing contaminants includes a stationary casing, enclosing a separation space through which a gas flow is permitted, a gas inlet extending through the stationary casing and permitting supply of the gas to be cleaned, a rotating member including a plurality of separation members arranged in said separation space and being arranged to rotate around an axis of rotation, a gas outlet configured to permit discharge of cleaned gas and including an outlet opening through a wall of the stationary casing, a drainage outlet configured to permit discharge of liquid impurities separated from the gas to be cleaned, and a drive member, for rotating the rotating member. The centrifugal separator further includes a control unit configured to control the drive member to rotate the rotating member at a first speed during a separation phase and at a second speed, which is higher than the first speed, during a cleaning phase to remove clogging on or between said separation members, wherein the cleaning phase is shorter in time than the separation phase.