Refractory Wall Ceramic Corrosion Protection Layer

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Solution Overview

Problem

Existing fireproof walls in combustion furnaces and fluidized bed furnaces are unable to completely prevent corrosive flue gases from penetrating through the protective cladding and attacking the metallic base elements, necessitating complex and energy-consuming active rear ventilation systems.

Innovation Solution

A fireproof wall design featuring a metallic base element with a ceramic corrosion protection layer, comprising a mixture of tricalcium aluminate and SiC, which is applied as a hardened or hydraulically set ceramic paste, allowing aggressive smoke gases to escape without attacking the base element, thus eliminating the need for active rear ventilation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If active ventilation systems are used to pump protective gas through the gap between base element and protective cladding, then flue gases are prevented from penetrating and attacking the metallic base element, but device complexity and energy consumption increase

Engineering Contradiction:

Improveprotection of base element from corrosive flue gasesVSAvoidcomplexity of active ventilation system

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The invention extracts and removes the complex active ventilation system from the protective cladding assembly, replacing it with a simpler passive design where the protective gas is supplied through the protective cladding itself rather than requiring external pumping systems

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The protective cladding structure serves its own protective function by allowing the protective gas to be supplied through it passively, eliminating the need for external active ventilation systems to pump gas through the gap between base element and cladding

Inventive Principle:

Principle #25Self-service

2Reliability

Engineering Contradiction:

Improveprotection of base element from corrosive flue gasesVSAvoidenergy consumption for pumping protective gas

Core Design Contradiction:

ReliabilityVSUse of energy by stationary object

Solution Approach 1:

The invention extracts and removes the energy-consuming pumping function from the system, replacing it with a passive supply mechanism where protective gas is delivered through the protective cladding without requiring external power

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

Inventive Principle:

Principle #25Self-service

3Object-affected harmful factors

If protective cladding is sealed to prevent passage of flue gases, then flue gas penetration is reduced, but complete protection of base element is not achieved

Engineering Contradiction:

Improvepenetration of corrosive flue gasesVSAvoidcomplete protection of base element

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The invention applies different properties to different parts of the protective cladding assembly: the cladding itself provides structural protection and thermal insulation, while the integrated gas supply system provides chemical protection by allowing protective gas to flow through the cladding to reach the base element

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The protective cladding assembly functions as a composite system combining structural cladding material with integrated gas supply channels, creating a multi-functional structure that provides both mechanical protection and chemical protection through the combined action of cladding and protective gas flow

Inventive Principle:

Principle #40Composite materials

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 ceramic corrosion protection layer effectively prevents corrosive flue gases from damaging the base element, simplifying the design and reducing energy consumption by eliminating the need for active ventilation while maintaining high temperature resistance and optimal heat transfer.

Implementation Method 1

The at least one base element has a ceramic corrosion protection layer on at least one side facing the protective cladding. The ceramic corrosion protection layer prevents aggressive flue gases that have penetrated the protective cladding from attacking at least one base element.

Methodology Applied

Scientific EffectChemical resistance:

Implementation Method 2

The refractory protective cladding is arranged at a distance from the at least one base element, with a gap between the at least one base element and the protective cladding through which flue gases that have penetrated the protective cladding can escape.

Methodology Applied

Scientific EffectGas flow:

Data Source

PatentEP3561385B1Refractory wall with Anti-corrosive layer

Publication Date: 2021.06.02 MOKESYS

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AI summary

A refractory wall (W), in particular for a combustion furnace, comprises a base element (1), in particular a metallic one, and a refractory protective lining (2) made of refractory plates (21) placed in front of the base element (1). To protect against flue gases passing through the protective lining (2), the base element (1) has a ceramic corrosion protection layer (10) at least on one side facing the protective lining (2).