Solid Fuel Boiler Wall Lining Wedge Seal Design
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Solution Overview
Problem
Existing refractory wall linings for combustion chambers are prone to gas leakage due to temperature loads, require high structural effort, and are costly due to the need for precise positioning and sealing means, resulting in short service lives and complex production processes.
Innovation Solution
A fireproof and gas-tight wall lining composed of four wall blocks with two opposite blocks forming wedge-shaped abutting surfaces, creating a double wedge effect for a secure seal without additional sealing means, and incorporating elastic seals between blocks for enhanced leakage prevention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sealing means are used on abutting surfaces of wall blocks, then gas-tightness is improved, but structural effort and cost increase
Solution Approach 1:
The patent removes sealing means from the system entirely, relying instead on the geometric design of abutting surfaces. The wedge-shaped surfaces with complementary geometry create an interference fit that provides gas-tightness without any additional sealing components, directly resolving the contradiction between gas-tightness and structural complexity.
Solution Approach 2:
The abutting surfaces are designed to self-seal through their geometric configuration. The wedge shape creates an interference fit where the surfaces press against each other under thermal expansion and operational conditions, providing automatic gas-tightness without external sealing means or complex assembly procedures.
2Reliability
If beveled edges or wedge surfaces are used for wall blocks, then gas-tightness is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent employs asymmetric wedge-shaped abutting surfaces with specific geometric relationships. The surfaces are designed with complementary angles and profiles that guide automatic alignment during assembly, reducing the need for high positioning precision while maintaining gas-tightness through the interference fit created by the asymmetric geometry.
3Reliability
If wall blocks are designed with wedge-shaped abutting surfaces, then gas-tightness is improved, but construction complexity increases
Solution Approach 1:
The wall lining is segmented into modular wall blocks with standardized wedge-shaped abutting surfaces. This segmentation allows for simplified construction through repetitive assembly of identical or similar components, where the wedge geometry provides self-aligning and self-sealing properties that reduce construction complexity despite the specialized surface design.
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 ensures a stable, long-lasting, and cost-effective gas-tight seal, simplifying construction and reducing manufacturing complexity while maintaining high stability and preventing gas leakage.
Implementation Method 1
the abutting surfaces, which taper in the direction of the combustion chamber and in addition in a direction other than the direction of the combustion chamber in a wedge shape
Implementation Method 2
an elastic seal is provided at least between the wall blocks on the side facing away from the combustion chamber
Data Source
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AI summary
The invention relates to a boiler for solid fuels (5), in particular made from renewable raw materials, comprising a combustion chamber (4) intended for combusting the solid fuels (5), said combustion chamber having a fireproof and gas-tight wall lining (1) made of several wall bricks (6, 7, 8, 9), in particular fire bricks, arranged next to each other, of which at least one wall brick (9) forms butt joints (10, 11) together with the wall bricks connected to the sides of said wall brick, which butt joints are tapered in a wedge shape in the direction (12) of the combustion chamber. In order to create advantageous design conditions, the butt joints (10, 11) are additionally tapered in a wedge shape in a direction (13) other than the direction (12) of the combustion chamber (4), in particular in the direction of the combustion chamber floor (4').