Exchanger Reactor Heat Transfer Fluid Distributor Design
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Solution Overview
Problem
Existing catalytic exchange reactors face challenges in maintaining optimal conversion rates and selectivity, especially during highly exothermic reactions, due to issues like hot spots, catalyst deactivation, and complex thermal management, which affect reactor performance and safety.
Innovation Solution
The design of an exchange reactor with modular heat transfer fluid distribution and collection elements that modify the thermal characteristics by adjusting internal walls and flow paths, allowing for optimized heat transfer and catalyst activity maintenance without altering the heat transfer fluid's temperature or flow conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the heat transfer fluid flow rate is increased to improve thermal management, then hot spots are reduced, but the pressure drop and energy consumption increase
Solution Approach 1:
The heat transfer fluid circuit is divided into multiple independent circuits, each serving specific zones of the reactor. This segmentation allows targeted heat removal from hot spots without requiring high flow rates throughout the entire reactor, reducing overall energy consumption while maintaining temperature uniformity.
Solution Approach 2:
Different heat transfer fluid circuits are configured with different flow rates and temperature profiles according to the local thermal requirements of specific reactor zones. Zones with higher reaction rates receive more intensive cooling, while other zones receive proportionally less, optimizing energy usage across the entire system.
2Loss of energy
If the heat transfer fluid flow rate is decreased to reduce energy consumption, then operating costs are reduced, but hot spots form and catalyst deactivation increases
Solution Approach 1:
The reactor is divided into multiple zones with independent heat transfer circuits, allowing selective cooling of regions where exothermic reactions occur most intensely. This ensures catalyst protection in critical zones while maintaining lower overall energy consumption.
Solution Approach 2:
Heat transfer fluid flow rates and temperatures are optimized for each local zone based on the catalyst's thermal sensitivity and reaction rate. Catalyst-sensitive zones receive targeted cooling to prevent deactivation, while other zones operate with reduced cooling requirements.
3Temperature
If multiple heat transfer fluid circuits are used to improve thermal control, then temperature uniformity increases, but device complexity increases
Solution Approach 1:
The heat transfer system is segmented into multiple circuits that can be independently controlled. Each circuit serves specific reactor zones, allowing simplified control logic for each individual circuit while achieving overall temperature uniformity through the combined effect of all circuits.
4Productivity
If the reactor operates at high conversion rates, then productivity increases, but thermal runaway risk increases due to exothermic reactions
Solution Approach 1:
The reactor is divided into multiple zones with independent heat transfer circuits, allowing intensive cooling in regions where high conversion rates generate significant heat. This enables high overall productivity while preventing thermal runaway through localized thermal management.
Solution Approach 2:
Heat transfer conditions are optimized locally in each zone according to the reaction rate and thermal hazards. Zones with high conversion rates receive enhanced cooling to prevent thermal runaway, while zones with lower activity operate with reduced cooling, maintaining productivity while managing risk.
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 configuration enhances conversion rates and selectivity while managing catalyst deactivation, improving thermal control and reducing the risk of thermal runaway, even under variable conditions.
Implementation Method 1
a heat transfer fluid circuit for cooling the reactive channels, comprising a plurality of heat transfer channels
Implementation Method 2
The invention can also be used as a heat exchanger for applications, in particular those using a gas, which require frequent maintenance operations
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 3~5C
AI summary
The invention relates mainly to an exchanger reactor, intended for carrying out endothermal or exothermal catalytic reactions, including a reactor body (2), a reactive circuit comprising a plurality of reactive channels comprising a catalyst, optionally supported by a monolithic catalyst structure, a heat-transfer fluid circuit for cooling the reactive channels, comprising a plurality of heat-transfer channels (5), an element (6) for distributing heat-transfer fluid, located upstream from the heat-transfer channels (5), and an element (7) for collecting heat-transfer fluid, located downstream from the heat-transfer channels (5), characterised in that the element (6) for distributing heat-transfer fluid and/or the element (7) for collecting heat-transfer fluid include means (10) for modifying the distribution of heat-transfer fluid towards the heat-transfer channels (5) and/or from the heat-transfer channels (5), respectively, in order to modify the thermal properties of the heat-transfer fluid circuit.