Conduit Cooling via Protective Fluid in Combustion Plant Ceramic Components
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Solution Overview
Problem
In incinerator and boiler systems, devices exposed to high temperatures and flue gas from multiple sides have short service lives due to extreme heat and deposits, and existing protective measures like ceramic components are insufficient, limiting media supply and gas extraction to system walls.
Innovation Solution
A method and device where a protective fluid is supplied between a line and a ceramic component, with the fluid being directed to the hottest point and lower regions to enhance cooling, and can include air supply for overpressure and gas sampling, with lines and nozzles for fluid injection and extraction, and heat exchanger tubes for temperature control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If devices are placed in the middle area of the heat generator (combustion chamber and flue gas flues), then system efficiency and functionality are improved, but service life is reduced due to extreme temperatures and deposits
Solution Approach 1:
A protective fluid (coolant) is introduced as an intermediary substance between the line and the ceramic component, flowing in the annular space to absorb heat and protect the line from direct exposure to extreme temperatures and flue gas, thereby extending service life while maintaining system functionality
Solution Approach 2:
The protective fluid is supplied beforehand to create a thermal barrier before the line is exposed to extreme heat, preventing direct thermal damage and allowing the line to operate in high-temperature zones without immediate degradation
2Object-affected harmful factors
If a ceramic component surrounds the line, then thermal protection is improved, but cooling effectiveness is reduced due to heat accumulation in the ceramic
Solution Approach 1:
The protective fluid acts as a thermal intermediary, absorbing heat from the ceramic component's inner surface and transporting it away, preventing heat accumulation while maintaining the ceramic's protective barrier function
Solution Approach 2:
The protective fluid utilizes phase change (evaporation/boiling) at high temperatures to absorb large amounts of latent heat from the ceramic component, effectively cooling the inner surface without requiring continuous high-flow liquid cooling
3Temperature
If protective fluid is supplied continuously, then cooling effectiveness is improved, but energy consumption and system complexity increase
Solution Approach 1:
The protective fluid is supplied as a liquid that evaporates upon contact with the hot ceramic surface, utilizing the high latent heat of vaporization to achieve intense cooling with minimal fluid quantity, reducing continuous pumping energy requirements
Solution Approach 2:
The hot ceramic component itself serves as the heat source that drives the evaporation of the protective fluid, creating a self-cooling mechanism where the thermal energy present in the system is utilized for its own cooling without requiring external power input
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
The method effectively prolongs the service life of devices by continuous cooling and heat transfer limitation, enabling efficient media supply and temperature measurement in high-temperature areas, and supports denitrification and gas sampling.
Implementation Method 1
the protective fluid is supplied between the line and the ceramic component... a particularly good cooling function can be achieved
Implementation Method 2
the protective fluid is supplied in a lower region of the ceramic component, since it then heats up there and rises in the ceramic component
Implementation Method 3
The protective fluid between the line and the ceramic component limits heat transfer
Data Source
Figure 1
Figure 2~3
AI summary
The invention relates to a method for guiding a line (14) in a combustion plant and to a device with a line, in which the line (14) is surrounded by a ceramic component (2) which is exposed to flue gas from at least two opposite sides, wherein a protective fluid chamber with a protective fluid supply (8) and/or heat exchanger tubes are provided between the line (14) and the ceramic component (2).