Systems and methods of debottlenecking propane feed
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Solution Overview
Problem
Commercial scale separation of olefins from paraffins in the petrochemical industry is highly energy and capital intensive, and existing propane/propylene splitter systems often bottleneck, limiting feedstock flexibility and incurring high costs for debottlenecking.
Innovation Solution
A propylene separation system using a membrane configured with polymeric materials or ceramic tubes with zeolite active layers to separate a dry feed stream of propane and propylene into retentate and permeate streams, followed by distillation and integration with a propylene refrigeration system, reducing energy consumption and capital expenses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If conventional distillation is used to separate propylene from propane, then separation is achieved, but energy consumption and capital costs are high
Solution Approach 1:
The separation process is divided into multiple stages: a first distillation column performs initial separation, followed by a membrane separation unit that further divides the streams, and finally a second distillation column that completes the separation. This segmentation allows each unit to operate more efficiently than a single large distillation column, reducing overall energy consumption while maintaining high separation efficiency
Solution Approach 2:
The membrane separation unit acts as an intermediary between the two distillation columns. It receives mixed C3 streams from the first column and produces enriched propylene and propane streams that are fed to the second column. This intermediary step reduces the separation burden on the distillation columns, lowering their energy requirements while achieving the desired manufacturing precision
2Adaptability or versatility
If existing propane/propylene splitter systems are used, then current production is maintained, but feedstock flexibility is limited and debottlenecking costs are high
Solution Approach 1:
The integrated system combines distillation and membrane separation technologies in a single configuration that can handle multiple feedstock types and production rates. The membrane unit can be adjusted to process different C3 stream compositions, and the system can operate at various throughput levels without requiring complete redesign, providing both feedstock flexibility and cost-effective scalability
Solution Approach 2:
The system incorporates dynamic adjustment capabilities where the membrane separation unit can be tuned to optimize performance for different operating conditions and feedstock compositions. This dynamic flexibility allows the system to adapt to changing market conditions and feedstock availability without requiring expensive debottlenecking projects, as the existing configuration can be optimized for different scenarios
3Use of energy by stationary object
If membrane separation is used to separate propylene from propane, then energy consumption is reduced, but propylene concentration in retentate decreases
Solution Approach 1:
The separation process is divided into multiple stages: a first distillation column performs initial separation, followed by a membrane separation unit that further divides the streams, and finally a second distillation column that completes the separation. This segmentation allows each unit to operate more efficiently than a single large distillation column, reducing overall energy consumption while maintaining high separation efficiency
Solution Approach 2:
The membrane separation unit acts as an intermediary between the two distillation columns. It receives mixed C3 streams from the first column and produces enriched propylene and propane streams that are fed to the second column. This intermediary step reduces the separation burden on the distillation columns, lowering their energy requirements while achieving the desired manufacturing precision
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 system achieves high propylene recovery with reduced energy consumption and capital expenses, enabling increased production output and flexibility in feedstock processing while minimizing environmental impact.
Implementation Method 1
a membrane configured to separate the feed stream into a retentate stream and a permeate stream, wherein the retentate stream includes propylene at a concentration lower than the concentration of propylene in the feed stream and the permeate stream includes propylene at a concentration higher than the concentration of propylene in the feed stream
Implementation Method 2
providing the retentate stream to a distillation column to separate propylene from propane and produce a propylene discharge stream and a propane discharge stream
Data Source
AI summary
Systems and methods for debottlenecking propane feed, including a propylene separation system and C3 distillation column are provided herein. In some embodiments, the method includes providing a dry feed stream including propane and propylene to a propylene separation system including a membrane configured to separate the C3 feed stream into a retentate stream and a permeate stream, and providing at least a portion of the permeate stream and at least a portion of the propylene discharge stream to a propylene refrigeration system.