Vertical Separator Screw Inversion for Slurry Clogging
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Solution Overview
Problem
Traditional vertical-axis separators for slurry treatment face inefficiencies in solid-liquid separation, particularly due to clogging from deposited solid particles which reduces filtering ability and requires complex filtering stations.
Innovation Solution
A vertical separator employing a dual pressing and counter-pressing action using a screw mechanism within a tubular screen device, where the screw rotates in a direction opposite to its winding direction, generating a counter-head to the pump, effectively separating solids and liquids while maintaining screen cleanliness through turbulence and optimizing filtering efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional vertical-axis separators use a tubular screen device with filtering means, then solid-liquid separation is achieved, but the screen becomes clogged with deposited solid particles reducing filtering ability
Solution Approach 1:
The screw is rotated in the opposite direction to its winding direction, creating a counter-head pressure that prevents solid particles from depositing on the screen surface. This reverse rotation approach inverts the conventional screw operation to achieve screen cleaning and prevent clogging while maintaining continuous separation operation
Solution Approach 2:
The system employs periodic reverse rotation of the screw to periodically clean the screen surface by removing deposited solid particles. This periodic action restores filtering ability without requiring shutdown or complex cleaning mechanisms, maintaining continuous operation
2Productivity
If the screw rotates in the conventional direction, then slurry is pushed through the screen, but solid particles deposit on the screen reducing separation efficiency
Solution Approach 1:
The screw rotation direction is inverted relative to its winding direction, creating counter-head pressure that prevents particle deposition while maintaining throughput. This allows continuous operation at high productivity without efficiency loss from clogging
Solution Approach 2:
The system changes the operational parameter of screw rotation direction to create counter-head pressure, transforming the pressure distribution to prevent particle deposition on the screen while maintaining slurry flow and separation efficiency
3Reliability
If complex filtering stations are used to prevent clogging, then screen cleanliness is maintained, but device complexity increases
Solution Approach 1:
The screw mechanism itself performs the cleaning function by generating counter-head pressure that prevents particle deposition. The system uses its existing moving part to serve a dual function: slurry transport and screen cleaning, eliminating the need for separate complex filtering stations
Solution Approach 2:
The screw mechanism is designed to perform multiple functions: transporting slurry through the screen and simultaneously preventing particle deposition on the screen surface. This multi-functionality eliminates the need for separate cleaning mechanisms or complex filtering stations
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 approach enhances the separation process by continuously cleaning the screen, improving filtering efficiency, reducing clogging, and allowing for cleaner liquid fractions, enabling better reuse and cost savings, and minimizing nitrate reduction.
Implementation Method 1
generating a counter-head to the pump, effectively separating solids and liquids while maintaining screen cleanliness through turbulence
Data Source
Figure 1
Figure 2
AI summary
A vertical separator (10) for the treatment of slurry. The vertical separator (10) comprises: a screen device (14), with a vertical axis (Z), provided with a screen (15); - a feeding device (11, 12, 13, 18), provided with a pump (12), to feed the slurry to a screen device (14); - a discharge device (20, 23) for the liquid part; and - a discharge device (21, 22) for the solid particles. The screen device (14) houses a counter-pressing device (16) (e.g. a screw (16)), which is designed to generate a reaction, which partially counters the pushing action exerted by the pump (12) upon the slurry.