Rotating Roll Solid-Liquid Separator with Overlapping Filter Cloths
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Solution Overview
Problem
Horizontal vacuum filtering apparatuses face challenges in achieving sufficient dehydration of filtered cakes due to limitations in differential pressure, making it difficult to reach target liquid content, and existing secondary dehydration methods are not effective for continuous operation.
Innovation Solution
A solid-liquid separating device with a rotating cylindrical roll and overlapping endless filter cloths that apply both radial pressing and circumferential shearing forces, combined with radial ventilation through holes, to efficiently dehydrate materials, allowing for continuous operation without the need for additional secondary dehydrators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a pressing plate or pressing roll is used to apply expression pressure perpendicular to the filter cloth, then the cake is pressed and dehydrated, but the liquid content cannot achieve sufficient target value depending on material properties
Solution Approach 1:
The invention transitions from unidirectional pressing (perpendicular to filter cloth) to bidirectional squeezing by wrapping filter cloths around a rotating separating roll. This adds a circumferential dimension to the dehydration force, creating both radial pressing and circumferential shearing forces that work together to reduce liquid content more effectively.
Solution Approach 2:
The invention replaces static pressing with dynamic rotational squeezing. The separating roll rotates to continuously wrap and unwrap the filter cloths, creating dynamic motion that enhances the squeezing effect. The rotation enables continuous operation and maintains constant contact pressure between the filter cloths and cake material throughout the dehydration process.
2Quantity of substance
If a solid-liquid separating device with moving sealant is used to press the cake, then dehydration is improved, but the device cannot be applied without change when the filter cloth travels continuously
Solution Approach 1:
The invention replaces the moving sealant mechanism with a rotating separating roll that continuously wraps and unwraps the filter cloths. This dynamic rotational motion naturally accommodates continuous filter cloth travel without requiring mechanical adjustments or modifications to the sealing mechanism, enabling seamless integration with continuous operation systems.
Solution Approach 2:
The separating roll serves multiple functions: it provides the squeezing action, maintains contact between filter cloths, enables continuous operation, and eliminates the need for separate sealing mechanisms. This multi-functional design makes the device universally applicable to both intermittent and continuous filter cloth travel modes without requiring configuration changes.
3Quantity of substance
If additional secondary dehydrators such as centrifuges or filter presses are added, then the liquid content target is achieved, but the device complexity and cost increase
Solution Approach 1:
The invention combines the filtering and secondary dehydration functions into a single integrated system. The separating roll with wrapped filter cloths performs both the filtering action and the intensive squeezing dehydration that would traditionally require separate equipment, eliminating the need for additional secondary dehydrators and reducing overall system complexity.
Solution Approach 2:
The horizontal vacuum filtering apparatus is enhanced to perform multiple dehydration functions through the separating roll mechanism. The same apparatus that performs initial vacuum filtering also performs intensive squeezing dehydration, making it a multi-functional device that replaces what would traditionally require separate dedicated equipment for each stage.
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 device effectively reduces liquid content in filtered materials, easing the burden on drying devices and preventing liquid reabsorption, while allowing for continuous operation and economical use of existing filtering apparatus components.
Implementation Method 1
A solid-liquid separating device with a rotating cylindrical roll and overlapping endless filter cloths that apply both radial pressing and circumferential shearing forces
Implementation Method 2
a material supplied between the pair of filter cloths is squeezed by being rolled together with the pair of filter cloths therebetween on the outer circumference of the separating roll
Implementation Method 3
the material is dehydrated by ventilating via each through hole
Data Source
AI summary
A solid-liquid separating apparatus is provided with: a separating roll which has a substantially cylindrical shape with a plurality of through holes, which penetrate between an inner surface and an outer surface in radial direction thereof, and is rotatable in circumferential direction thereof; and a pair of separating filter cloths which is endless belts capable of traveling in a rotation direction of the separating roll and are wound around the outer circumference of the separating roll so as to overlap each other, wherein a material supplied between the pair of filter cloths is squeezed by being rolled together with the pair of filter cloths therebetween on the outer circumference of the separating roll, and the material is dehydrated by ventilating via each through hole.