Simulated Moving Bed Separator Secondary Flush Conduit
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Solution Overview
Problem
Simulated moving bed separators require significant energy to separate the desired component from the desorbent, as the extract conduit is typically rinsed with a desorbent, leading to a high desorbent concentration and increased energy demands during distillation.
Innovation Solution
Implementing a secondary flush conduit flushed with a secondary flush fluid that includes a high concentration of desorbent and desired component, reducing the desorbent concentration in the extract and minimizing energy requirements during distillation by using the extract itself for flushing, rather than pure desorbent.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the extract conduit is rinsed with pure desorbent, then the extract bed is effectively cleaned and prepared for the next cycle, but the desorbent concentration in the extract increases, requiring more energy for distillation
Solution Approach 1:
The patent introduces a secondary flush bed as an intermediary between the extract bed and the desorbent source. This secondary flush bed receives pure desorbent first, then transfers it to the extract bed through the extract conduit. The mediator (secondary flush bed) allows the system to rinse the extract conduit effectively while controlling when and how pure desorbent contacts the extract bed, thereby reducing unnecessary desorbent accumulation in the extract stream that would require energy-intensive distillation removal.
Solution Approach 2:
The system performs preliminary flushing of the extract conduit with desorbent in the secondary flush bed before the desorbent reaches the extract bed. This preliminary action cleans the conduit of any residual extract or contaminants that would otherwise contaminate the next extract cycle, while preventing pure desorbent from directly mixing with the extract stream in a way that would increase distillation energy requirements.
2Use of energy by moving object
If a secondary flush bed is added to the system, then the energy consumption for distillation is reduced, but the device complexity increases
Solution Approach 1:
The secondary flush bed is designed to perform multiple functions: (1) it serves as a preliminary rinsing chamber for the extract conduit, (2) it acts as an additional extraction stage that can contribute to the overall separation process, and (3) it provides a buffer zone that controls the timing and concentration of desorbent transfer to the extract bed. This multi-functionality justifies the addition of one more bed by providing several benefits beyond just energy reduction.
Solution Approach 2:
The system changes the operational parameters of the secondary flush bed dynamically - during certain cycles it receives pure desorbent for conduit flushing, during other times it may operate in extraction mode contributing to product recovery. This parameter flexibility allows the system to optimize energy consumption without permanently increasing the baseline complexity, as the additional bed can be utilized in multiple operational modes.
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 reduces the energy needed for distillation by lowering the desorbent concentration in the extract, thereby enhancing the efficiency of the separation process and reducing operational costs.
Implementation Method 1
Selective adsorption can separate a desired component from a feed mixture by adsorbing the desired component while letting other components in the mixture flow by
Implementation Method 2
The desorbent displaces the desired component from the adsorbent in a desorption process, and the desired component can then be collected with some excess desorbent
Data Source
AI summary
A simulated moving bed separator and methods for isolating a desired component are provided. A method includes removing an extract from an extract bed of the simulated moving bed separator, where the extract includes the desired component, and where the simulated moving bed separator includes a plurality of adsorbent beds circularly coupled together. The simulated moving bed separator also includes a distributor and a plurality of conduits fluidly coupling the distributor to the adsorbent beds. The adsorbent beds include the extract bed and a secondary flush bed downstream from the extract bed. A secondary flush conduit is flushed with a secondary flush fluid while removing extract from the extract bed, where the secondary flush conduit fluidly couples the secondary flush bed with the distributor. The flush fluid includes the extract.