Cyclone Porous Insert Prevents Liquid Re-entrainment
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Solution Overview
Problem
Existing technologies fail to reliably separate the liquid phase from supersaturated gas streams, which is crucial for industrial applications requiring precise control of saturated gas mixtures, such as gas conditioning in fuel cells and humidity control in buildings.
Innovation Solution
A cyclone design featuring a porous, 3-dimensional insert that prevents re-entrainment of the liquid phase by maintaining a constantly negative capillary pressure, allowing for precise control of supersaturation and separation, with features like thermal insulation, adjustable heating/cooling, and a level sensor-driven drainage system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If gas velocity is increased to improve productivity, then separation efficiency deteriorates due to liquid remixing
Solution Approach 1:
The patent employs a porous insert made of hydrophilic porous material (such as porous ceramic, metal foam, or sintered material) that utilizes capillary forces to retain liquid on its surface. The porous structure creates a liquid film that is held by capillary pressure, preventing liquid droplets from being entrained back into the gas flow even at high gas velocities. This resolves the contradiction by allowing high productivity while maintaining separation reliability through the physical properties of the porous material.
Solution Approach 2:
The porous insert acts as an intermediary element between the liquid phase and gas phase. It provides a structured interface where liquid can be held and controlled, mediating the interaction between the two phases. The insert's porous structure serves as a transition zone that prevents direct contact and mixing between liquid and gas, enabling high gas velocity while maintaining liquid separation.
2Reliability
If a porous insert is used to prevent liquid re-entrainment, then device complexity increases
Solution Approach 1:
The porous insert serves multiple functions simultaneously: it acts as a liquid retention structure, a flow distributor, and a separation interface. By combining these functions into a single component, the design avoids the need for multiple separate elements (such as liquid collectors, distributors, and separation surfaces), thereby reducing overall device complexity while maintaining reliable liquid separation.
Solution Approach 2:
The use of a preformed porous insert simplifies the cyclone structure compared to traditional designs that require complex internal geometries or multiple components. The porous material's inherent structure provides the necessary liquid retention and flow distribution functions, reducing the number of parts and simplifying assembly while ensuring reliable liquid-gas separation.
3Reliability
If the cyclone is thermally insulated to maintain separation, then energy consumption increases
Solution Approach 1:
The porous insert utilizes the inherent capillary properties of the porous material to automatically retain liquid without requiring external energy input. The capillary forces within the porous structure self-regulate the liquid film, maintaining separation stability without the need for active heating or cooling systems. Thermal insulation is minimized or eliminated, and the system serves itself through the physical properties of the porous material.
Solution Approach 2:
Instead of using energy-intensive active heating or cooling to maintain separation stability, the design converts the potential harm of temperature variations into a benefit by relying on the temperature-insensitive capillary forces of the porous material. The porous structure maintains its liquid retention capability across a wide temperature range, turning thermal variability from a problem into a feature that enhances system robustness without 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
Enables increased gas velocity without liquid remixing, minimizing system size, ensuring scalability and effective separation across varying pressure and temperature conditions, and allowing precise control of supersaturation.
Implementation Method 1
This material is selected according to the liquid, so that a constantly negative capillary pressure in the partially saturated region 4a, near a riser tube inlet 2a, prevents re-entrainment of the liquid phase due to the high shear forces of the gas flow.
Implementation Method 2
a cyclone for separating the liquid phase from a supersaturated gas stream
Data Source
Figure 1
AI summary
The invention relates to a cyclone for separating the liquid phase from a supersaturated gas flow, wherein a porous 3-dimensional region is provided as the liquid sink and is configured as a preformed insert (4), and wherein a) the insert (4) comprises a material having wetting properties with respect to the liquid to be separated off, and/or b) the porosity and/or lamination and/or shape is adapted to the dynamics of the supersaturated gas flow and to the amount of liquid to be separated off, and/or c) a constant drainage of the accumulating liquid is provided in the saturated pore space; and/or d) an unsaturated pore space is ensured in the region of a standpipe inlet (2a), and/or e) the insert (4) is partially immersed in the liquid to be separated off during stationary operation.