Flash Evaporation Drying via Venturi Pressure Drop
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Solution Overview
Problem
Traditional industrial methods for transitioning substances with a vapor pressure threshold from one phase to another, such as drying coal wash fines or desalinating seawater, are energy-intensive and environmentally unfriendly, relying on the burning of fossil fuels for heat generation.
Innovation Solution
A method and system utilizing controlled sub-atmospheric pressure environments and rapid pressure drops, combined with low temperatures and Bernoulli's principle, to instantaneously flash evaporate substances like water, separating it from materials without external heat, using venturi nozzles and positive displacement blowers to create a vacuum for efficient phase transition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If traditional heating methods are used to evaporate moisture from materials, then the phase transition from liquid to vapor is achieved, but energy consumption increases significantly
Solution Approach 1:
The patent utilizes flash evaporation, a rapid phase transition from liquid to vapor, by subjecting moisture-laden materials to sudden pressure reduction. This allows efficient moisture removal without requiring continuous external heating, thereby reducing energy consumption while maintaining high drying efficiency.
Solution Approach 2:
The invention changes the pressure parameter abruptly to induce flash evaporation. By reducing pressure from atmospheric levels to vacuum levels rapidly, the boiling point of moisture is lowered, enabling phase transition at lower temperatures and with less energy input compared to traditional heating methods.
2Temperature
If fossil fuels are burned to generate heat for drying, then the required temperature is achieved, but environmental pollution increases
Solution Approach 1:
The patent achieves the necessary processing temperature through rapid pressure reduction rather than combustion. By lowering pressure to vacuum levels, the boiling point of water decreases, allowing phase transition at lower temperatures that do not require fossil fuel combustion, thus eliminating atmospheric emissions while maintaining effective drying temperatures.
Solution Approach 2:
The invention replaces the thermal-mechanical system of fossil fuel combustion with a pressure-mechanical system. Instead of burning fuels to generate heat, the system uses mechanical vacuum generation to create pressure differential, which drives flash evaporation. This substitution eliminates the harmful combustion process while achieving the same thermal effect.
3Speed
If high temperatures are applied to dry materials quickly, then drying speed increases, but energy waste increases
Solution Approach 1:
The patent employs flash evaporation, a rapid phase transition that achieves fast drying speeds. The sudden pressure drop causes moisture to instantly vaporize, removing water from materials rapidly without requiring sustained high temperatures. This phase transition mechanism provides high drying speed while minimizing energy waste compared to gradual heating methods.
Solution Approach 2:
The invention rushes through the drying process by inducing instantaneous flash evaporation through rapid pressure reduction. Instead of slowly heating materials over extended periods, the system creates a sudden pressure differential that causes immediate vaporization of moisture, completing the drying action in a brief time window and reducing overall energy consumption.
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 significantly reduces energy consumption and environmental impact by achieving efficient drying and phase transition without fossil fuel use, allowing for high-efficiency drying of materials and water purification with minimal emissions.
Implementation Method 1
rapid pressure drops, Bernoulli's principle, continuum hypothesis, Pascal's law, Boyles law... to instantaneously flash evaporate substances like water
Implementation Method 2
controlled pressure drops... rapid pressure drops
Implementation Method 3
controlled sub atmospheric pressure environment... positive displacement blowers to create a vacuum
Data Source
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AI summary
Methods and systems are disclosed for drying a material or, more generally, flash evaporating a target substance having a vapor pressure threshold. The methods and systems include a conveyor conduit (14) that receives material and within which a pressure is established that is greater than the vapor pressure threshold of the target substance. The material moves through the conveyor (14) and is expelled into a pressure drop zone (19) created by one or more venturi nozzles (12). The pressure in the pressure drop zone (19) is far less than the vapor pressure threshold of the target substance. As the material encounters the pressure drop zone (19), the targeted substance in the material experiences a rapid and extreme pressure drop and simultaneously a rapid temperature increase. This causes the target substance in the material to flash evaporate virtually immediately. The resulting vapor is separated from the remaining material and the now dry material is collected for further processing or use. The vapor can be collected, condensed, exhausted, or otherwise treated depending upon the goals of a particular installation or process.