Vacuum-Assisted Vertical Glass Refining Apparatus
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Solution Overview
Problem
The existing processes for melting and refining silica-based glass are slow, energy-intensive, and require large spaces, making them inefficient and difficult to scale.
Innovation Solution
A modular apparatus with a two-stage process involving a first melting vessel and a system of vertical chambers with vacuum assistance to refine and homogenize the glass melt, allowing for the addition of cullet and additional materials to enhance bubble release and viscosity reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional in-furnace melting and refining process is used, then glass melt can be produced, but the process is slow (24 hours) and energy-intensive
Solution Approach 1:
The patent divides the traditional single furnace process into two separate segments: a melting vessel for rapid melting and vertical chambers for refining. This segmentation allows each component to be optimized for its specific function, enabling faster overall processing while reducing energy consumption in the melting stage.
Solution Approach 2:
The patent performs preliminary melting in a dedicated melting vessel before transferring the glass melt to vertical chambers for refining. This preliminary action separates the high-energy melting step from the lower-energy refining step, reducing total energy input while maintaining productivity.
2Productivity
If traditional in-furnace process is used, then glass can be melted and refined, but large furnace space is required
Solution Approach 1:
The patent segments the glass production system into compact, modular components: a melting vessel and separate vertical chambers. This segmentation reduces the footprint of each component while maintaining overall productivity, as the vertical chambers utilize vertical space rather than horizontal furnace area.
Solution Approach 2:
The patent transitions from a horizontal furnace layout to a vertical chamber configuration. By utilizing the vertical dimension for the refining chambers, the system reduces the horizontal space requirement while maintaining glass output capacity.
3Reliability
If traditional melting process is used, then glass melt is produced, but bubble removal is inefficient and time-consuming
Solution Approach 1:
The patent extracts the refining function from the melting furnace and places it in separate vertical chambers. This extraction allows the refining process to occur in a dedicated environment optimized for bubble removal, significantly improving efficiency and reducing the time required to produce bubble-free glass.
Solution Approach 2:
The patent creates a controlled atmosphere environment in the vertical chambers that facilitates efficient bubble removal. The separate chamber design allows for optimized atmospheric conditions that enhance gas escape while preventing re-entrainment, improving reliability of bubble removal.
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 reduces the refining time from 24 hours to approximately 6 hours, improves energy efficiency, and allows for easy scaling of glass production by using a sodium-calcium-silicate glass as an intermediate precursor to produce high-quality silica-based glass with minimal bubble entrainment.
Implementation Method 1
A vacuum preferably is applied to the cross passage to assist upward flow of the glass melt through the first vertical chamber.
Implementation Method 2
Glass melt from the first melting vessel flows upward through the first vertical chamber, through the cross passage and then downward through the second vertical chamber to refine and homogenize the glass melt from the first melting vessel.
Data Source
AI summary
An apparatus for melting and refining a silica-based glass composition includes a vertical first reaction chamber having an input adjacent to a lower end for receiving glass-forming components. The glass-forming components are heated to elevated temperature during upward flow through the vertical first reaction chamber to form a glass precursor melt adjacent to an upper end of the vertical first reaction chamber. A vertical second reaction chamber has an input adjacent to an upper end and an output adjacent to a lower end for delivering glass melt. A cross passage connects the upper end of the vertical first reaction chamber to the upper end of the vertical second reaction chamber such that the precursor melt flows from the vertical first reaction chamber through the cross passage and then through the vertical second reaction chamber to homogenize the precursor melt. Vacuum preferably is applied to the cross passage both to assist upward flow through the vertical first reaction chamber, and to assist refining of the precursor melt during such upward flow and during flow through the cross passage.