Regenerator Partition Wall Cooling Duct Design
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Solution Overview
Problem
The existing regenerator designs for glass melting furnaces face stability issues due to thermally loaded partition walls exposed to corrosive exhaust gases and thermal shocks, requiring either a lowered foundation or increased space, which are undesirable.
Innovation Solution
Incorporating a cooling duct with U-shaped flow paths in the lateral wall element between the vertical flow channel and the upper region of the chamber grating, featuring cooling pipes or cavities for efficient cooling, to reduce thermal stress on the partition wall.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the burner port is arranged below the chamber grating to reduce regenerator height, then the structural height is reduced, but the partition wall is exposed to thermal shock and corrosive exhaust gases
Solution Approach 1:
A cooling duct is introduced as an intermediary element within the partition wall structure. This cooling duct allows cooling medium to flow through the partition wall, creating a protective thermal barrier that mediates between the hot exhaust gases and the partition wall material, thereby protecting the wall from thermal shock and corrosion while maintaining the reduced height configuration
Solution Approach 2:
The thermal parameters of the partition wall are changed by introducing active cooling. The cooling duct enables the partition wall temperature to be maintained at a lower, more stable level despite exposure to high-temperature exhaust gases, transforming the wall from a passively heated structure to an actively cooled one resistant to thermal shock
2Volume of stationary object
If the partition wall is exposed to corrosive exhaust gases and thermal shock, then the regenerator can be compact, but the wall element stability deteriorates
Solution Approach 1:
The cooling duct serves as a protective intermediary that flows cooling medium through the partition wall, creating a thermal barrier that shields the wall material from direct exposure to corrosive exhaust gases and thermal shock, thereby maintaining wall stability in a compact regenerator configuration
Solution Approach 2:
The cooling duct provides beforehand cushioning by pre-cooling the partition wall before thermal shock from exhaust gases can damage it. The continuous flow of cooling medium maintains the wall in a thermally protected state, cushioning it against thermal stress and corrosion before they can compromise structural integrity
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
Enhances the stability of the partition wall by mitigating thermal shocks and corrosive exposure, allowing for simpler cooling and maintaining system efficiency without the need for increased space or foundation adjustments.
Implementation Method 1
a cooling duct with cooling pipes or cavities arranged horizontally one above the other for the introduction and removal of a cooling medium
Implementation Method 2
air or a liquid or gaseous cooling medium flows through the cooling tubes
Implementation Method 3
a gas-permeable chamber grid to store waste heat from combustion cycles and to release the stored heat to oxidation gases
Implementation Method 4
the exhaust gas heat is used to preheat the combustion air
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A regenerator (10) for glass melting furnaces (1) for storing waste heat from combustion cycles and releasing the stored heat to externally supplied oxidation gases is described. The regenerator has a gas-permeable chamber grid (11) in which the chamber lining, consisting of refractory bricks, is held together by lateral wall elements (12, 13). A ceiling area (21) is formed above the chamber grid (11) for the combustion gases entering the chamber grid (11) and the oxidation gases exiting it. The chamber ceiling (15), together with an adjoining further ceiling section (18), which is bounded by a downwardly projecting end wall (19) connected to the burner neck (9), forms a flow channel (23) together with the wall element (12).In order to increase the stability of the wall element (12) serving as a partition in a regenerator of the type mentioned, it is provided that the section of the lateral wall element (12) between the vertically running flow channel (23) and the upper area of the chamber grid (11) is designed as an intermediate wall (24) with a cooling passage (25) arranged therein.