Rotary Disc Thermal Separation for Compact High-Rate Evaporation
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Solution Overview
Problem
Existing thermal separation technologies for multi-component substances face challenges such as inefficient heat transfer, high energy consumption, and the need for large apparatus due to the use of indirect or friction-based methods, which result in prolonged evaporation times and environmental hazards.
Innovation Solution
A continuous thermal separation apparatus utilizing a rotary mechanism with a mixing device and external heating to create a vapor cloud within a treatment chamber, achieving near-instantaneous evaporation by intense mixing and turbulence, thereby optimizing heat transfer and reducing energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If indirect heating methods are used with internal transport mechanisms, then thermal separation can be achieved, but the apparatus becomes very long (10-20 meters) and evaporation time increases to 20 minutes
Solution Approach 1:
The invention introduces a dynamic rotating drum mechanism that continuously moves material through the heating zone. The drum rotation creates constant motion and renewal of material contact with heated surfaces, enabling rapid evaporation in a compact space. This dynamic approach replaces static indirect heating methods, achieving complete evaporation in seconds rather than minutes while reducing apparatus length from 10-20 meters to a compact configuration.
Solution Approach 2:
The invention fundamentally changes the heating parameter approach by using direct contact heating through rotating drum surfaces that are externally heated. This creates high heat transfer coefficients and intense thermal exposure. The system also changes the temporal parameter by reducing evaporation time from 20 minutes to seconds, which enables compact apparatus design while maintaining high productivity.
2Loss of energy
If indirect heating is used, then thermal separation can occur, but heat transfer efficiency is limited to approximately 75 W/m2K due to isolating layers forming on heated surfaces
Solution Approach 1:
The rotating drum mechanism continuously renews the material-heated surface contact, preventing the formation of stable isolating layers. The constant motion ensures that dried material is continuously removed from heated surfaces and replaced with fresh material, maintaining high heat transfer efficiency throughout the process. This dynamic renewal prevents the heat transfer degradation that occurs in static indirect heating systems.
Solution Approach 2:
The invention extracts the material from prolonged contact with heated surfaces by using the rotating drum to continuously move and renew contact points. This prevents the buildup of isolating layers that would otherwise form and reduce heat transfer efficiency. The system takes out the problematic isolating layer formation by design, replacing it with continuous renewal of thermal contact.
3Productivity
If friction-based thermal separation is used, then evaporation can occur, but energy consumption increases due to extensive rotational energy requirements
Solution Approach 1:
The invention introduces an external heating system as an intermediary that provides thermal energy independently of the mechanical rotation system. Instead of relying solely on friction-generated heat from rotation, the system uses externally heated drum surfaces to transfer heat to the material. This separates the transport function from the heating function, allowing efficient evaporation with reduced rotational energy requirements.
Solution Approach 2:
The invention replaces the mechanical friction-based heating system with a thermally-driven system using externally heated surfaces. Instead of generating heat through mechanical rotation and friction, the system uses external heat sources to warm the drum surfaces, which then transfer heat to the material during rotation. This substitution dramatically reduces the energy required for the mechanical rotation while maintaining high evaporation rates.
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 apparatus achieves significantly higher heat transfer rates and instantaneous evaporation, minimizing energy use and apparatus size while maintaining optimal mixing and cleanliness of inner surfaces, thus enhancing separation efficiency and reducing operational costs.
Implementation Method 1
a heating device arranged outside the treatment chamber and the inner surface... configured to transfer thermal energy via the inner surface
Implementation Method 2
achieve instantaneous or near instantaneous evaporation... by the intensive mixing of the substance
Implementation Method 3
at least one of the components is evaporable at an evaporation temperature Te... resulting operational temperature Top is equal or higher than the evaporation temperature Te
Implementation Method 4
the liquids change phase from liquid phase to gas phase
Data Source
AI summary
A separation apparatus for continuous thermal separation of a substance is fed into a treatment chamber. The substance includes two or more components where at least one of the components is evaporable at an evaporation temperature (Te). The separation apparatus includes a vessel including a vessel wall with an inner surface enclosing the treatment chamber having a length IC, a height H and a width W, a substance inlet for feeding the substance into the treatment chamber, a first outlet for releasing non--evaporated parts of the substance from the treatment chamber, a second outlet for releasing evaporated parts of the substance from the treatment chamber, and a rotary mechanism. The rotary mechanism includes a rotatable axle arranged within the treatment chamber having an orientation directed along the treatment chamber's length L and a mixing device fixed to, and extending perpendicular from, the rotatable axle. A radial outermost part of the mixing device includes a plurality of radially separated mixing protrusions, a rotary drive operatively connected to the rotatable axis, and a heating device arranged outside the treatment chamber. The heating device is configured to transfer thermal energy to a minimum peripheral volume (Vp) of the treatment chamber via the inner surface. The minimum peripheral volume (Vp) is defined as a volume between the inner surface and outer radial boundaries of the mixing device. The mixing device includes a plurality of rotary discs fixed with axial offsets to the rotatable axle. The heating device and the rotary drive are configured such that, when both the heating device and the rotary drive are operated at their respective operational input powers (Phd, Prm), a resulting operational temperature (Top) is obtained within at least part of the minimum peripheral volume (Vp) which is equal or higher than the evaporation temperature (Te).