Dehydrogenation Tank With Flow Stirring Modules
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Solution Overview
Problem
Current dehydrogenation units for ballast water treatment systems face a trade-off between volume and efficiency, with high efficiency requiring large volumes and high reliability needing extended retention times, making them unsuitable for compact installations on ships.
Innovation Solution
A dehydrogenation tank with flow stirring modules at the middle and bottom, featuring different mesh sizes and an atomizing spray to enhance hydrogen gas separation efficiency, combined with a compact design and an explosion-proof blower for safe operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the volume of the dehydrogenation unit is increased to improve dehydrogenation efficiency, then the separation performance improves, but the installation space requirement increases
Solution Approach 1:
The patent introduces a porous filler material into the dehydrogenation unit to increase the effective surface area for hydrogen gas separation. The porous structure provides numerous nucleation sites for bubble formation and enhances the liquid-gas interfacial area, thereby improving dehydrogenation efficiency without requiring a larger tank volume. The filler material creates a distributed separation mechanism throughout the tank.
Solution Approach 2:
The patent transforms the separation mechanism from a bulk-phase process to a surface-dominated process by introducing the porous filler. This adds a third dimension of separation surface area within the existing tank volume, effectively increasing the separation capacity without expanding the external dimensions of the unit.
2Reliability
If the retention time in the dehydrogenation tank is extended to improve separation reliability, then the dehydrogenation efficiency improves, but the tank volume must be increased
Solution Approach 1:
The porous filler material provides numerous nucleation sites that accelerate bubble formation and detachment, reducing the required retention time for effective hydrogen gas separation. The increased interfacial area allows for faster mass transfer, achieving the same separation reliability in a shorter time period and smaller volume.
Solution Approach 2:
The patent changes the physical parameters of the separation process by introducing the porous medium, which alters the bubble formation dynamics, interfacial area, and mass transfer coefficients. These parameter changes enable faster separation kinetics, reducing the required retention time while maintaining separation reliability.
3Volume of stationary object
If the dehydrogenation unit is compacted to reduce installation space, then the system becomes more suitable for ship installation, but the dehydrogenation efficiency decreases
Solution Approach 1:
The porous filler material enables the dehydrogenation unit to maintain high separation efficiency in a compact volume by maximizing the use of internal surface area. The porous structure provides extensive separation surface within a small footprint, allowing efficient hydrogen gas removal without requiring a large tank volume.
Solution Approach 2:
The porous filler material effectively nests additional separation surface area within the existing tank volume, creating a multi-scale separation structure. The hierarchical porosity provides separation surfaces at multiple length scales, maximizing the separation capacity within the available space.
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 achieves high dehydrogenation efficiency while reducing the volume of the dehydrogenation tank, ensuring safe and reliable operation, even under varying conditions, as demonstrated in different ship types with significant reductions in tank volume and high efficiency rates.
Implementation Method 1
a flow stirring module disposed at the middle of the dehydrogenation tank for stirring solution flowing therethrough
Implementation Method 2
an atomizing spray to enhance hydrogen gas separation efficiency
Implementation Method 3
The separated hydrogen gas is diluted with air introduced by an air blower and then discharged outboard
Data Source
AI summary
The present invention provides a dehydrogenation tank. An atomization spray is disposed at the center of the upper part of the dehydrogenation tank, and flow stirring modules used for stirring a flowing solution are respectively disposed at the middle and the bottom of the dehydrogenation tank. Each of the two flow stirring modules includes at least two layers of flow stirring meshes. By means of disposing the atomizing spray and the flow stirring modules in the dehydrogenation tank, the TRO solution flowing into the dehydrogenation tank are fully stirred, so that hydrogen gas mixed with the TRO solution is able to diffuse out fully and rapidly, thereby increasing dehydrogenation efficiency as well as reducing volume of the dehydrogenation tank. In addition, the present invention also provides a ballast water treatment system having the dehydrogenation tank.