Burner Cooling Jacket with Transitional Section
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing burners for partial combustion of carbonaceous fuels face challenges in managing high thermal stresses and pressure drops due to the high heat flux during the gasification process, which can lead to burner damage and coolant leaks.
Innovation Solution
A burner design featuring a central channel and coaxial channel with a cooling jacket and double-walled front face, including a transitional section that narrows to a smaller diameter to focus cooling effects on the intersection point of fuel and oxygen flows, and optional spiral flow paths optimized by baffles, reducing pressure drop and enhancing coolant flow stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a large number of spiral turns are used to cool the complete burner front, then the cooling coverage is improved, but the pressure drop increases considerably
Solution Approach 1:
The cooling jacket is designed with a transitional section that narrows to focus coolant flow specifically on the tip of the channels where fuel and oxygen flows intersect and mix, concentrating cooling effects on the area with highest thermal stresses rather than uniformly cooling the entire burner front
Solution Approach 2:
Instead of cooling the complete burner front with numerous spiral turns, the invention applies partial cooling action by focusing the coolant flow only on the critical tip area where thermal stresses are highest, reducing the overall cooling path length and associated pressure drop
2Productivity
If the annular slit is inclined in the flow direction to enable gas flow intersection and mixing, then the combustion effectiveness is improved, but the stability of oxygen-containing gas flow distribution deteriorates
Solution Approach 1:
The invention modifies the geometric parameters of the annular slit by providing a transitional section that narrows in flow direction, which stabilizes the flow distribution while preserving the inclination needed for effective mixing between fuel and oxygen streams
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 effectively reduces thermal stresses and pressure drop, ensuring stable and constant gas flow, minimizing erosion and prolonging burner lifespan while maintaining high operational efficiency.
Implementation Method 1
a cooling jacket which has a transitional section narrowing down to the smaller outer diameter of the front face... the cooling effect is focussed on the tip of the channels where the fuel and oxygen flows intersect and mix
Implementation Method 2
double walled front face... defining a coolant flow path operatively connected to the cooling jacket
Implementation Method 3
optional spiral flow paths optimized by baffles
Implementation Method 4
the issuing gas flow will intersect and mix with the flow of co-reactive combustible material issuing from the central channel into the downstream combustion zone
Implementation Method 5
In the reactor a flame is maintained in which the fuel reacts with the oxygen in the oxygen-containing gas at temperatures above 1300° C. to form mainly carbon monoxide and hydrogen
Data Source
AI summary
The invention relates to a burner, particularly for the gasification of solid carbonaceous materials by partial combustion. The burner comprises a central channel (2) and at least one coaxial channel (6). The channels (2, 6) are defined by concentric walls (3, 5) having free downstream outer ends profiled to define an annular slit (10) forming a discharge end of the coaxial channel (6) and converging towards an adjacent discharge end of the central channel (2). The burner (1) is encased by a cooling jacket (14) and comprises a front face (21) with double walls spaced by one or more baffles (28) defining a coolant flow path operatively connected to the cooling jacket (14). The cooling jacket (14) has an upstream section (14A) and a transitional section (25) narrowing down to the front face (21) having a smaller outer diameter than the upstream cooling jacket section.