Eyebrow Coil Jacket for Reactor Heat Control
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Solution Overview
Problem
Existing heat control systems for polymerization reactors face challenges in maintaining efficient heat control as reactors increase in size, leading to reduced heat control areas, increased operation costs, and potential quality issues due to scale formation in reflux condensers.
Innovation Solution
The use of an eyebrow coil jacket, manufactured from high thermal conductivity carbon steel or stainless metal, is affixed to the outer wall of the reactor in a spiral shape, allowing for improved coolant circulation and uniform temperature adjustment, maximizing the heat control area and reducing the gap interval between welded portions for enhanced heat exchange efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the size of the reactor is increased to improve productivity, then the heat control area is reduced, but cooling efficiency deteriorates
Solution Approach 1:
The jacket is segmented into multiple coil sections with optimized spacing, allowing the coolant to flow through a distributed network of heat exchange surfaces rather than a single continuous path. This segmentation increases the effective heat control area and maintains cooling efficiency in larger reactors by reducing thermal resistance and improving coolant distribution.
Solution Approach 2:
The cooling system transitions from a conventional single-layer jacket to a multi-dimensional coil structure that wraps around the reactor in multiple layers. This dimensional expansion increases the heat exchange surface area without significantly increasing the reactor footprint, thereby maintaining cooling efficiency while accommodating larger reactor volumes.
2Measurement precision
If a constant flux cooling type jacket is used to rapidly and precisely adjust temperature, then temperature control precision is improved, but initial manufacturing cost increases
Solution Approach 1:
The system achieves precise temperature control by dynamically adjusting operational parameters such as coolant flow rate, coolant temperature, and coil section activation rather than relying on complex manufacturing features. This allows standard manufacturing processes to be used while still achieving rapid and precise temperature adjustment through flexible operational control.
3Productivity
If scale is formed in the reflux condenser, then cooling efficiency is lowered and productivity is reduced, but scale removal is difficult
Solution Approach 1:
The cooling function is extracted from the reflux condenser and relocated to the external coil jacket system. By performing the primary cooling operation in the jacket before vapor reaches the condenser, scale formation in the condenser is minimized, and the cooling function is separated into a more accessible external system that is easier to maintain and clean.
4Reliability
If a jacket mounted at the inner wall of the reactor is used for direct cooling, then cooling efficiency is improved, but product cost increases due to expensive materials
Solution Approach 1:
Instead of mounting the cooling jacket on the inner wall of the reactor, the solution inverts the arrangement by placing the coil jacket on the outer wall. This external placement achieves effective cooling through the reactor wall while avoiding the need for expensive corrosion-resistant materials and complex internal installation, thereby reducing product cost while maintaining cooling efficiency.
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 increases the heat control area by up to 20% compared to conventional half pipe coil jackets, improving productivity and quality by reducing reaction time and minimizing scale formation, while maintaining high thermal efficiency and cost-effectiveness.
Implementation Method 1
manufactured from high thermal conductivity carbon steel or stainless metal
Implementation Method 2
a coolant is rapidly circulated and thus it is possible to uniformly adjust temperature
Data Source
AI summary
Disclosed herein is an eyebrow coil jacket, a heat control apparatus of a reactor using the eyebrow coil jacket, and a method for manufacturing the heat control apparatus of the reactor. According to the present invention, it is possible to provide an eyebrow coil jacket that is capable of increasing the heat control area of the reactor even when applied to a large-sized reactor so that a heat control amount of the heat control apparatus is improved 20% more than when a half pipe coil is used, a heat control apparatus of a reactor using the eyebrow coil jacket, and a method for manufacturing the heat control apparatus of the reactor.