Cross-linked Fiberglass Manufacturing Heat Recovery
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Solution Overview
Problem
The existing manufacturing processes for fiberglass products are energy-intensive, particularly in the melting and crosslinking phases, which affects the overall efficiency and quality of the glass fiber products.
Innovation Solution
The process optimizes energy integration by preheating combustion reactants and utilizing tempered air from a heat exchange unit for both the melting and crosslinking phases, reducing energy consumption and enhancing energy synergy throughout the production process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If traditional separate heating systems are used for melting and crosslinking phases, then each phase can be independently controlled, but energy consumption increases due to lack of heat recovery
Solution Approach 1:
The patent merges the heating functions for melting and crosslinking phases into a single integrated heat exchange system. The system recovers heat from flue gases to preheat combustion air for the melting furnace, and simultaneously uses this preheated air (tempered air) for the crosslinking phase, thereby reducing total energy consumption while consolidating heating operations into one coordinated system.
Solution Approach 2:
The patent recovers thermal energy that would otherwise be discarded in the flue gases. The heat exchange system captures heat from these exhaust gases and redirects it to preheat the combustion air and provide tempered air for crosslinking, transforming waste heat into a useful resource that reduces overall energy consumption.
2Productivity
If high temperature heating is used for both melting and crosslinking, then processing speed increases, but energy consumption and operational costs increase
Solution Approach 1:
The patent applies preliminary heating action by preheating the combustion air using flue gas heat recovery before it enters the melting furnace. This preheated air then serves as tempered air for the crosslinking phase, ensuring that both high-temperature processes receive optimized thermal input that maintains processing speed while reducing the additional energy that would be required to achieve the same results from cold air.
3Loss of energy
If flue gases are directly discharged without heat recovery, then system simplicity is maintained, but thermal energy is wasted
Solution Approach 1:
The patent converts the potentially harmful hot flue gases that would normally be discarded into a beneficial heat source. The heat exchange system captures thermal energy from these flue gases and transforms it into useful preheated combustion air and tempered air for crosslinking, thereby eliminating energy waste while the byproduct (tempered air) provides additional process benefits.
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 significantly improves energy efficiency in fiberglass production, maintaining product quality while reducing energy consumption, particularly by leveraging residual heat in tempered air for crosslinking and other stages.
Implementation Method 1
air is heated by heat exchange with fumes evacuated in a heat exchange unit with the production of hot air
Implementation Method 2
The molten glass to be transformed into a fiberglass product is produced in a melting furnace heated by the combustion of a fuel with a rich oxidant
Implementation Method 3
melting glass in a melting furnace
Implementation Method 4
centrifugal drawing by means of a centrifuge
Implementation Method 5
gas friction drawing by means of one or more gas drawing streams
Implementation Method 6
cross-linking of the collected sizing filaments
Data Source
Figure 1
AI summary
The invention relates to a method and facility for manufacturing a cross-linked fiberglass material, in which melted glass is produced in a melting furnace (10) heated via combustion of a fuel with an oxygen-rich oxidant. The melted glass is converted into glass filaments, the filaments are bonded, a sheet is made from the bonded filaments, and the sheet is then cross-linked. The fumes from the melting furnace are used to preheat a combustion reagent in two steps: a first step in which air is heated via heat exchange with the fumes, and a second step in which the combustion reagent is preheated via heat exchange with the hot air. The air is then used in the cross-linking step of the method for converting the melted glass into a fiberglass material.