Gasifier Burner Slag Runner Using Pipe Elbows
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Solution Overview
Problem
Existing solutions fail to effectively prevent slag from clogging burner outlets and damaging gasifier walls during the gasification of ash-containing fuels, as they either overheating, inadequately deflect slag, or lead to system failure when damaged.
Innovation Solution
A slag chute formed by pipe bends with a sloping surface facing the gasifier interior, connected gas-tight to the gasifier wall, providing a cooled slag deflection channel that can handle high slag volumes and maintain system integrity even if damaged.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a pipe arc lined with refractory materials is used to protect the burner recess, then protection against slag is improved, but overheating of the tube sheet occurs and the lining is not completely enclosed
Solution Approach 1:
The protective structure is divided into separate functional segments: the pipe arc for slag deflection and the tube sheet for structural support. The pipe arc is completely enclosed by refractory material, creating a segmented protective system where each component has a specific function, preventing heat transfer to the tube sheet while maintaining slag protection.
Solution Approach 2:
The completely enclosed refractory material acts as an intermediary layer between the slag/pipe arc and the tube sheet. This intermediary provides thermal insulation, preventing heat from the high-temperature environment and slag contact from reaching the tube sheet, thus solving the overheating problem while maintaining protection.
2Temperature
If cooling water flows through the protective shield, then cooling effect is improved, but complete system failure occurs if the shield is damaged
Solution Approach 1:
The cooling system is segmented into multiple independent cooling channels within the pipe arc structure. If one channel or section is damaged, the other segments continue to function, preventing complete system failure. The modular segmented design isolates damage to local areas only.
Solution Approach 2:
The pipe arc structure incorporates redundant cooling pathways and is designed with sufficient cooling capacity margin. The refractory lining provides an additional protective barrier that cushions against thermal damage. This beforehand cushioning ensures that even if cooling efficiency is temporarily reduced by damage, the system maintains protection against thermal failure.
3Device complexity
If the known slag deflection design is used, then simple structure is maintained, but it provides neither a sharp breaking edge nor sufficient deflection for larger slag quantities
Solution Approach 1:
The pipe arc is designed with asymmetric geometry featuring a sharp leading edge at the front and a gradually expanding cross-section along the flow direction. This asymmetric shape creates an effective sharp breaking edge for slag while providing sufficient deflection angle and volume for larger slag quantities, all within a relatively simple single-component structure.
Solution Approach 2:
The pipe arc employs a curved, arc-shaped geometry rather than straight lines or sharp angles. This curvature provides a smooth flow path for slag while the rounded leading edge creates an effective breaking surface. The spherical/curved shape distributes slag impact forces more effectively and provides continuous deflection along the arc path, handling larger slag volumes without increasing structural complexity significantly.
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 reliably deflects slag around the burner mouth, even with high slag volumes, and ensures the gasifier walls remain intact, allowing for separate installation and removal of the slag channel without disturbing the rest of the construction.
Implementation Method 1
a slag channel (8) is formed by a plurality of pipe bends (9) through which a cooling medium flows
Implementation Method 2
which in the assembly position form a channel surface pointing into the interior of the carburetor, inclined towards the carburetor wall, shielding the burner or the burner niche in the direction of gravity
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The aim of the invention is to design a slag runner on burners or burner recesses for providing protection against dripping slag produced when ash-containing, finely divided fuels are gasified within a gasifier such that the burner outlets or the burner recesses are safely prevented from getting clogged with slag. Said aim is achieved by the fact that the slag runner (8) is formed by a plurality of pipe elbows (9) through which cooling medium flows and which form a runner surface that faces the interior of the gasifier, extends at an angle from the gasifier wall (1), and shields the burner (2) or the burner recess (7) in the top region in the direction of gravity in the mounted position, said runner surface forming a substantially acute angle (a) relative to the burner wall (1).