Fluid-Cooled Panel Cooling Gas for Incinerator Wall Strain
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Solution Overview
Problem
Existing waste incineration plants face issues with clogging and cracking of perforated wall tiles in the upper wall zone due to excessive temperatures, leading to early replacement and inefficiencies in cooling the refractory materials.
Innovation Solution
Incorporating fluid-cooled panels with openings for cooling gas introduction, which moves with burning gases along the side wall upwards to cool the upper wall zone and act as a buffer between flames and refractories, preventing clogging and wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If perforated wall tiles are used in the upper wall zone for cooling, then the refractories are protected from excessive temperatures, but the tiles experience clogging and cracking leading to early replacement
Solution Approach 1:
The patent introduces cooling gas through openings in the fluid-cooled panel as an intermediary substance. This cooling gas acts as a mediator between the hot refractory materials and the cooling system, allowing heat removal without direct contact between cooling media and the refractory structure, thereby preventing clogging and cracking of traditional perforated tiles
Solution Approach 2:
The patent employs fluid dynamics by introducing cooling gas through openings in the fluid-cooled panel. The gas flow is directed along the side wall upwards to cool the upper wall zone, utilizing pneumatic principles to achieve cooling without the mechanical contact that causes wear and cracking in solid tile systems
2Temperature
If cooling air is supplied through perforated wall tiles, then the upper wall zone is cooled, but the tiles are subject to intensive combustion temperatures causing wear
Solution Approach 1:
Cooling gas introduced through openings in the fluid-cooled panel serves as an intermediary cooling medium. It provides thermal protection to the upper wall zone by absorbing heat without being subjected to the same intensive combustion temperatures that directly damage perforated wall tiles, thereby reducing thermal strain and wear
3Temperature
If fluid-cooled panels are used without openings, then cooling is provided, but thermal strain on the upper wall zone cannot be effectively reduced
Solution Approach 1:
The fluid-cooled panel is designed with openings that function similarly to porous structures. These openings allow cooling gas to pass through and reach the upper wall zone, enabling effective thermal strain reduction while maintaining the structural integrity and cooling capability of the panel without requiring complex additional components
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 solution effectively reduces thermal strain on the upper wall zone, preventing clogging and extending the lifespan of refractory materials by providing a controlled cooling mechanism that complements the existing secondary air supply.
Implementation Method 1
the cooling gas is introduced through openings in the fluid-cooled panel and moved together with the burning gases along the side wall upwards, thereby cooling the upper wall zone
Implementation Method 2
providing a buffer between the flames above the incinerated waste and said upper wall zone
Data Source
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AI summary
In a waste incineration plant comprising a furnace (1) having a grate (2) on which the waste being incinerated is transported from the waste inlet (3) to the ash outlet (4), side walls extending along said grate, said side walls comprising a wear zone in the form of a fluid-cooled panel (5) positioned immediately adjacent the grate (2), and an upper wall zone (6) above said wear zone, said upper wall zone being provided in the form of refractories (6), the fluid-cooled panel (5) is provided with openings (7) through which cooling gas is introduced for reducing the thermal strain on the upper wall zone (6).