Heated Fluid Delivery Layout for Uniform Wide-Substrate Heating
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Solution Overview
Problem
Existing systems for delivering heated fluids to substrates, such as moving web-like substrates, face challenges in achieving uniform temperature control and efficient fluid distribution, leading to inconsistent heating processes.
Innovation Solution
The apparatus comprises a preheat zone, an expansion zone with significant lateral expansion and tertiary contraction, and an expanded zone equipped with trim heaters and fluid flow-distribution sheets, ensuring precise temperature control and uniform fluid distribution across the substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional heated fluid delivery system is used, then the system structure is simple, but uniform temperature control and efficient fluid distribution cannot be achieved
Solution Approach 1:
The apparatus is divided into distinct functional zones: a preheat zone with a preheater for initial heating, an expansion zone for fluid distribution, and an expanded zone with multiple trim heaters for precise temperature control. This segmentation allows each zone to perform its specific function optimally, achieving uniform temperature control through coordinated operation of separate components.
Solution Approach 2:
Different regions of the apparatus provide different heating characteristics: the preheater provides bulk heating in the preheat zone, while multiple trim heaters provide localized temperature adjustment in the expanded zone. The fluid flow-distribution sheet further creates local quality variations by distributing fluid uniformly across the substrate width, ensuring consistent heating at different lateral positions.
2Area of stationary object
If heated fluid is delivered to wide substrates, then the substrate width is covered, but temperature uniformity across the substrate deteriorates
Solution Approach 1:
The apparatus addresses two-dimensional substrate heating requirements by adding a lateral dimension to the heating system. Multiple trim heaters are arranged across the lateral extent of the expanded zone, and the fluid flow-distribution sheet distributes heated fluid laterally, creating uniform temperature control across the wide substrate width while maintaining consistent temperature in the downstream direction.
Solution Approach 2:
The fluid flow-distribution sheet acts as an intermediary between the heated fluid source and the substrate. It receives heated fluid from the expansion zone and distributes it uniformly across the expanded zone, ensuring consistent thermal energy delivery to different lateral positions on the substrate and eliminating temperature variations across wide substrates.
3Reliability
If conventional heating systems are used, then the system is simple to operate, but inconsistent heating processes occur
Solution Approach 1:
The apparatus employs multiple temperature sensors positioned at different locations within the expanded zone to monitor temperature distribution. These sensors provide feedback to a controller that adjusts the operation of trim heaters and fluid flow-distribution to maintain consistent temperatures, ensuring reliable and repeatable heating processes through continuous monitoring and adjustment.
Solution Approach 2:
The system maintains continuous heating action through the coordinated operation of the preheater and multiple trim heaters across different zones. The preheater continuously supplies preheated fluid to the expansion zone, while trim heaters continuously adjust temperatures in the expanded zone, ensuring uninterrupted and consistent heating throughout the process.
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 allows for precise temperature control and uniform heating of the fluid, enabling effective bonding and processing of substrates like fibrous mats, even on wide substrates, with minimal temperature variation across the substrate.
Implementation Method 1
a preheat zone comprising a preheater
Implementation Method 2
a plurality of trim heaters collectively extending across at least a portion of the lateral extent of the expanded zone
Implementation Method 3
at least one fluid flow-distribution sheet
Data Source
AI summary
Apparatus and methods for delivering a heated fluid. The apparatus includes at least a preheat zone, an expansion zone, and an expanded zone comprising a plurality of trim heaters, at least one fluid flow-distribution sheet, and an outlet. The apparatus may be used for delivering the heated fluid onto a moving fluid-permeable substrate.