Multirotational Counter-Rotating Reactor for Compact Gas-Liquid Separation
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Solution Overview
Problem
Conventional packed bed reactors, including Rotated Packed Beds (RPBs), face inefficiencies and large footprints due to limitations in mass-transfer coefficients, tangential slip velocities, and energy consumption, necessitating a more compact and efficient design for industrial-scale applications.
Innovation Solution
A multirotational counter-rotating reactor design with coaxial shafts and alternating discs that rotate in opposite directions, enhancing mass transfer and reducing size and energy consumption through improved fluid flow dynamics and heat transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional packed bed columns are used for gas-liquid separation, then the process can handle industrial-scale throughput, but the reactor requires large footprint and high bulkiness
Solution Approach 1:
The patent applies rotational dynamics by introducing a rotating packed bed that spins at high speeds to generate artificial gravity. The packing material rotates with the bed, creating dynamic centrifugal forces that enhance mass transfer coefficients by 2-8 times compared to conventional static packed beds, allowing compact design while maintaining industrial throughput
Solution Approach 2:
The patent changes the gravitational parameter from natural gravity (1g) to high centripetal acceleration (up to 1000g) by rotating the packed bed. This parameter change fundamentally alters the fluid flow dynamics, enabling thin film liquid flow patterns and dramatically increasing mass transfer rates without requiring large reactor volumes
2Productivity
If Rotated Packed Beds with high centripetal acceleration are used, then mass transfer rate increases 2-8 times, but the design complexity and operational understanding are insufficient
Solution Approach 1:
The patent segments the rotating packed bed into multiple functional zones with different packing types (structured packing, random packing, spray nozzles) arranged in specific sequences. This segmentation allows optimization of mass transfer in different regions while providing modular design that simplifies operational understanding and maintenance
Solution Approach 2:
The rotating packed bed design integrates multiple functions into a single device: gas-liquid contact, heat transfer, liquid distribution, and gas redistribution all occur within the rotating assembly. This multi-functionality reduces the need for separate equipment, simplifying overall process design despite the complex internal dynamics
3Device complexity
If single-direction rotation is used in RPBs, then the structure is simpler, but tangential slip velocities and mass transfer efficiency are limited
Solution Approach 1:
The patent introduces counter-rotating disks that rotate in opposite directions to the main rotating packed bed. This counter-rotation creates enhanced tangential slip velocities between the gas and liquid phases, dramatically improving mass transfer efficiency. The counter-rotating elements also prevent flow pattern stagnation and maintain dynamic mixing
4Productivity
If conventional RPBs are scaled up for carbon capture at industrial power plants, then the separation capacity increases, but hundreds of units are required making the facility scale comparable to the power plant itself
Solution Approach 1:
The patent combines multiple mass transfer functions into a single integrated rotating packed bed unit. By merging gas-liquid contact, heat transfer, and flow distribution functions into one high-performance device, the system achieves industrial-scale carbon capture capacity in a fraction of the space required by conventional packed bed columns, eliminating the need for hundreds of separate units
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 design achieves higher mass transfer efficiency, reduces the reactor footprint, and lowers energy consumption while maintaining consistent flow rates, addressing the limitations of conventional RPBs.
Implementation Method 1
centripetal acceleration in the RPBs can achieve 1000 g, where g is defined as the acceleration of gravity
Implementation Method 2
the multiple counterrotating unit reactors have heat transfer capabilities to enhance separation capabilities
Data Source
AI summary
Embodiments presented provide for a multirotational counter rotating reactor. The reactor is configured to accept a fluid stream and separate the fluid stream into high quality liquid and gaseous phases through spinning of the sets of discs as well as through performing a heat transfer to the fluid stream.