Vibratory Separator Screen Pressure Differential Air Knife
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Solution Overview
Problem
Vibratory separators face inefficiencies in separating liquids from solids due to the lack of effective pressure differential application across the screen, which hampers the rate and efficiency of liquid removal.
Innovation Solution
A pressure differential pan is coupled to a tray below the screen of a vibratory separator, fluidly connecting a pressure differential device to create a pressure differential across the screen, utilizing an air knife or vacuum system to enhance liquid and vapor removal through the screen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a pressure differential device is applied across the screen to improve liquid removal rate, then the separation efficiency is improved, but the device complexity increases
Solution Approach 1:
The pressure differential device is segmented into multiple air knife assemblies distributed along the length of the screen. Each air knife assembly independently creates localized pressure differentials, allowing the system to achieve high overall liquid removal rates without requiring a single complex high-capacity device. This segmentation reduces the complexity of individual components while maintaining high productivity.
Solution Approach 2:
The invention uses pneumatic air knife assemblies to create pressure differentials across the screen instead of traditional mechanical vacuum systems. Compressed air is introduced through slots in the air knives, creating a pneumatic field that pulls liquid through the screen. This pneumatic approach simplifies the mechanical structure while significantly improving liquid removal rates.
2Productivity
If a pressure differential device is applied across the screen to enhance liquid removal, then the separation efficiency is improved, but the energy consumption increases
Solution Approach 1:
The air knife assemblies apply pressure differential only in specific zones where liquid removal is most needed, rather than across the entire screen uniformly. The air knives are positioned to target areas with highest liquid accumulation, providing partial action that achieves high separation efficiency with reduced overall energy consumption compared to full-screen pressurization.
Solution Approach 2:
The system uses multiple air knife assemblies that can be operated in a sequenced or periodic manner along the screen length. Instead of all air knives operating simultaneously at full power, they can be activated in zones based on liquid load distribution, creating periodic action patterns that reduce peak energy consumption while maintaining high separation efficiency.
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 significantly increases the rate and volume of liquid and vapor removal from the solids, improving the separation efficiency and reducing energy consumption by using a pressure differential system that integrates with the vibratory motion of the separator.
Implementation Method 1
a pressure differential may be developed or applied across a screen disposed in the separator. The pressure differential may be applied by a pressure differential device internal or external to the separator that applies a pressure differential across the screen to pull both liquids and vapor or air through the screen
Implementation Method 2
utilizing an air knife or vacuum system to enhance liquid and vapor removal through the screen
Data Source
AI summary
A device and system applicable to separating components of a slurry is disclosed. The slurry can be a mixture of drilling fluid and drilling cuttings that can be separated with a separatory screen. A separatory tray can be disposed below an underside of the separatory screen. A pressure differential pan can provide fluid flow to a sump. A pressure differential generator can be located within the pressure differential pan and create a pressure differential between an upper side and a lower side of the separatory screen to enhance the flow of drilling fluid through the separatory screen.