Dynamic Feed Inlet Selection for Distillation Energy Savings
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Solution Overview
Problem
Fluctuating compositions in raffinate-2 streams during distillation processes lead to inefficient separation and increased energy consumption, as existing methods struggle to adapt to changing component proportions.
Innovation Solution
A process involving at least two distillation columns with multiple inlets, where the feed stream's composition is analyzed before introduction, allowing for the selection of the optimal inlet for efficient separation and energy savings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single fixed inlet is used for the feed stream, then the device complexity is low, but the separation efficiency deteriorates when feed composition fluctuates
Solution Approach 1:
The patent implements dynamic adaptability by providing multiple inlets (first inlet and second inlet) that can be selectively activated based on real-time feed composition analysis. The system transitions from a static single-inlet design to a dynamic multi-inlet configuration where the optimal inlet is chosen depending on whether the feed is rich or poor in heavy components, enabling the distillation column to adapt to varying operating conditions without requiring complete redesign
Solution Approach 2:
The patent applies parameter changes by modifying the operational parameters of the distillation column through selective inlet activation. When the feed composition changes (particularly the proportion of heavy components like C6+), the system changes the operational parameter by switching between different inlets, which alters the feeding position and consequently optimizes the separation process for the specific feed composition
2Manufacturing precision
If the feed stream is analyzed for composition before introduction, then the separation efficiency is improved, but the loss of time increases due to analysis and selection processes
Solution Approach 1:
The patent implements preliminary action by performing composition analysis of the feed stream before it enters the distillation column. This advance analysis allows the system to pre-determine the optimal inlet configuration in advance, so that when the feed actually enters the column, the correct inlet is already selected and activated, minimizing any potential delay or adjustment time during the separation process
Solution Approach 2:
The patent applies feedback by using the composition analysis results to control the inlet selection. The analysis of feed composition (particularly heavy component content) provides feedback that directs the system to activate the appropriate inlet (first inlet for feed rich in heavy components, second inlet for feed poor in heavy components), creating a closed-loop control system that continuously optimizes separation efficiency based on actual feed conditions
3Adaptability or versatility
If multiple inlets are provided for the feed stream, then the adaptability to composition changes is improved, but the device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the feed introduction system into distinct segments (first inlet and second inlet), each optimized for specific feed composition ranges. The first inlet is designed for feeds rich in heavy components while the second inlet is designed for feeds poor in heavy components, allowing the system to segment the operation based on feed characteristics and select the appropriate segment for optimal performance
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 enables optimal separation of raffinate-2 streams while reducing energy consumption by selecting the appropriate inlet based on the feed stream's composition, thereby improving process efficiency and consistency.
Implementation Method 1
the vapor streams from DK1 and DK2 are at least partially condensed, and the resulting condensation energy of at least one of the vapor streams from DK1 or DK2 is used by vapor recompression or by means of a heat pump to heat at least one of the distillation columns DK1 or DK2
Implementation Method 2
a vapor stream is produced at the head and a bottom stream is produced at the bottom
Data Source
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AI summary
The invention relates to a process for distilling a raffinate-2 stream as a feed stream in at least two distillation columns DK1 and DK2, wherein at least the distillation column DK1 has two different inlets for the feed stream. The process is characterized in that the feed stream is analyzed for its composition before introduction; and one of the at least two inlets is selected for the feed stream depending on the composition of the feed stream.