Hydrocyclone Control for Dense Material Separation
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Solution Overview
Problem
Existing hydrodynamic dense materials separators face challenges in optimizing the flow and pressure of flushing water, leading to inefficient separation and contamination of fractions, particularly due to pressure fluctuations and high water consumption, which disrupt the selective removal of dense materials and impact downstream recycling processes.
Innovation Solution
A control system that regulates the flow and pressure of flushing water in the classifying tube and storage chamber, using sensors and actuators to optimize the flushing water flow based on operational requirements, minimizing water consumption and preventing cementation of dense materials, while ensuring continuous operation and reducing the need for frequent emptying and refilling cycles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If flushing water flow is increased to prevent cementation of dense materials, then discharge reliability is improved, but water consumption increases and separation quality deteriorates
Solution Approach 1:
The system employs periodic action by alternating between filling the storage chamber with flushing water and emptying it. The control system activates the flushing water supply only when needed (when dense materials are present in the chamber) and stops it when the chamber is full or empty, preventing continuous water consumption while maintaining discharge reliability.
Solution Approach 2:
The control system uses feedback from sensors (flow sensors, level sensors) to monitor the state of the storage chamber and adjusts the flushing water flow accordingly. When the chamber is full or empty, the system automatically stops flushing water supply, optimizing water usage while preventing cementation.
2Duration of action of moving object
If flushing water flow is increased to maintain continuous operation, then operational continuity is improved, but separation quality deteriorates due to disrupted counter-flow
Solution Approach 1:
The system uses periodic filling and emptying cycles rather than continuous flushing. The control system activates flushing water supply only during specific phases when the storage chamber needs to be filled, and stops it when the chamber is full or empty, maintaining operational continuity while preserving separation quality through uninterrupted counter-flow during critical separation phases.
Solution Approach 2:
The system dynamically adjusts the flushing water flow based on real-time conditions. The control system modulates the flow rate and duration of flushing water supply to match the operational needs, ensuring continuous operation when necessary while maintaining separation quality when the chamber is in a stable state.
3Productivity
If flushing water is supplied continuously to the classifying tube, then dense materials removal is improved, but water consumption increases and process water is wasted
Solution Approach 1:
The system employs periodic action by supplying flushing water only when the storage chamber needs to be filled with dense materials. The control system activates the flushing water supply during specific cycles and stops it when the chamber is full or empty, preventing continuous water consumption while maintaining effective dense materials removal.
Solution Approach 2:
The system recovers and reuses process water by collecting it during the emptying phase and making it available for the next filling phase. This water recovery mechanism reduces overall process water consumption while maintaining the effectiveness of dense materials removal.
4Reliability
If the storage chamber is emptied frequently to prevent cementation, then discharge reliability is improved, but loss of time increases due to frequent emptying and refilling cycles
Solution Approach 1:
The system uses periodic action with optimized timing to empty the storage chamber only when necessary. The control system monitors the state of the chamber and activates emptying only when dense materials have accumulated to a level that would cause cementation, minimizing the frequency of emptying operations while maintaining discharge reliability.
Solution Approach 2:
The control system uses feedback from level sensors and flow sensors to determine when the storage chamber needs to be emptied. By monitoring the actual state of the chamber, the system avoids unnecessary emptying operations and only activates the emptying function when dense materials have accumulated to problematic levels, reducing time loss.
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 enhances the separation quality of dense materials, reduces contamination, and minimizes flushing water requirements, thereby improving the efficiency and cost-effectiveness of the separation process by maintaining consistent flow and pressure, even with varying process water conditions.
Implementation Method 1
hydrodynamic separation of dense materials removes approx. 3% by weight of the moist mass of the waste being treated as dense materials
Implementation Method 2
flushing liquid is often delivered to the classifying tube. In this way a counter-flow is generated in the classifying tube which releases the dense materials that have been removed from the other components of the slurry
Implementation Method 3
the easily sedimentable portions are often removed from the suspension
Data Source
AI summary
The invention relates to a device and to a method for the hydrodynamic removal of dense materials from a suspension, said device comprising a hydrocyclone (1), which holds the suspension, a classifying tube (2), which adjoins the hydrocyclone, and a storage chamber (3), which holds the removed dense materials, wherein a flushing water flow to the classifying tube (2) and a flushing water flow to the storage chamber (3) are provided, which can be controlled in a closed-loop or open-loop manner by means of a control element provided at the feed to the classifying tube and a control element provided at the feed to the storage chamber, respectively.