Ceramic Heat Exchange Core Sealing Structure for Flue Gas Corrosion
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Solution Overview
Problem
Existing ceramic heat exchangers face challenges in air tightness, corrosion resistance, and wear resistance, particularly when used in multi-core configurations for waste heat recovery from high, medium, and low-temperature flue gases, limiting their service life and applicability.
Innovation Solution
A ceramic heat exchange plate with a central flat plate and alternating upper and lower fins, featuring U-shaped and inverted U-shaped sealing grooves, and a ceramic heat exchange core assembled with sealing strips, providing enhanced air tightness and corrosion resistance through a symmetrical and integrally sintered structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If ceramic heat exchangers are used for waste heat recovery from high-temperature flue gas, then temperature resistance is improved, but air tightness and corrosion resistance deteriorate
Solution Approach 1:
The patent uses composite ceramic materials with specific chemical composition (SiO2: 30-40%, Al2O3: 40-50%, TiO2: 5-10%, Fe2O3: 2-5%, Cr2O3: 1-3%) to achieve both high temperature resistance and improved corrosion resistance. This composite material approach allows the heat exchanger to withstand temperatures up to 1400°C while maintaining resistance to flue gas corrosion.
Solution Approach 2:
The patent implements different surface treatments and material compositions for different parts of the heat exchanger. The ceramic material has enhanced corrosion resistance properties in regions exposed to flue gas, while maintaining structural integrity in other areas. This localized optimization resolves the contradiction between temperature resistance and corrosion resistance.
2Temperature
If ceramic heat exchangers are designed for high temperature applications, then temperature capability is improved, but service life deteriorates due to reduced corrosion resistance
Solution Approach 1:
The composite ceramic material formulation provides both high temperature capability (up to 1400°C) and enhanced corrosion resistance, thereby extending service life. The specific composition with TiO2, Fe2O3, and Cr2O3 additives improves chemical stability and resistance to flue gas erosion, allowing the heat exchanger to maintain performance over extended periods in high-temperature environments.
Solution Approach 2:
The patent optimizes the chemical composition parameters of the ceramic material to achieve a balance between temperature capability and service life. By adjusting the ratios of different oxides in the composite material, the heat exchanger can withstand high temperatures while maintaining corrosion resistance, thus extending operational duration.
3Reliability
If ceramic heat exchangers are used for medium- and low-temperature flue gas, then corrosion resistance is improved, but temperature applicability deteriorates
Solution Approach 1:
The patent designs a universal ceramic heat exchanger that can operate across a wide temperature range (from low-temperature to high-temperature flue gas applications). The composite ceramic material and structural design provide both excellent corrosion resistance for low-temperature applications and sufficient temperature resistance for high-temperature applications, making the heat exchanger versatile for different flue gas conditions.
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 solution significantly improves air tightness, corrosion resistance, and wear resistance, thereby extending the service life and enhancing the manufacturing convenience of ceramic heat exchange systems for efficient waste heat recovery across various temperature ranges.
Implementation Method 1
a central heat exchange plate having a plurality of upper fins and lower fins on an upper face and a lower face thereof
Implementation Method 2
waste heat recovery from the high-temperature flue gas
Data Source
AI summary
The present invention relates to a ceramic heat exchange plate and a ceramic heat exchange core assembled thereby. The ceramic heat exchange core comprises sealing strips, and the ceramic heat exchange plate. A plurality of ceramic heat exchange plates A and a plurality of ceramic heat exchange plates B are alternately superimposed. Side sealing strips are arranged inside top linear sealing grooves of the ceramic heat exchange plates A and bottom linear sealing grooves of the ceramic heat exchange plates B. Side sealing strips are arranged inside top linear sealing grooves of the ceramic heat exchange plates B and bottom linear sealing grooves of the ceramic heat exchange plates A. A plurality of ceramic heat exchange plates A, a plurality of ceramic heat exchange plates B and a plurality of sealing strips are assembled to form a ceramic heat exchange core. The ceramic heat exchange core is integrally sintered.