Gasification Burner with Segmented Oxygen Channels
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Solution Overview
Problem
Existing burners for gasification of solid fuels face issues with short lifetimes due to high heat-flux at high throughputs and erosion problems, particularly when designed for large capacities, and are complex to manufacture.
Innovation Solution
A burner design with a central oxygen passage and an annular solid fuel passage, where the central passage has a varying diameter and includes a hollow member aligned with the annular passage for optimal oxygen-fuel contact, reducing heat flux and erosion, and featuring connecting conduits for even oxygen distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a burner is designed for high throughput gasification, then productivity increases, but heat flux to the burner front increases causing shortened burner lifetime
Solution Approach 1:
The burner divides the fuel discharge into multiple separate channels instead of a single annular channel, segmenting the high-velocity flow into discrete streams that reduce erosive impact on the burner front while maintaining high throughput capacity
Solution Approach 2:
A cooling medium (water or gas) is introduced as an intermediary substance between the high-velocity fuel flow and the burner front, absorbing excess heat and reducing the thermal flux that causes burner degradation, thereby extending burner lifetime while maintaining high throughput operation
2Productivity
If an annular opening is used for solid fuel discharge at high throughput, then productivity increases, but erosion problems worsen
Solution Approach 1:
The single annular fuel discharge opening is segmented into multiple separate channels, distributing the high-velocity flow across multiple paths rather than concentrating it in one annular stream, thereby reducing erosive wear on the burner components while maintaining high throughput
3Adaptability or versatility
If multiple channels for solid fuel and oxygen containing gas are integrated in one metal piece, then device functionality improves, but manufacturing complexity increases
Solution Approach 1:
The burner is divided into separate modular components (fuel channels, cooling channels, oxygen channels) that can be manufactured independently and then assembled together, reducing the manufacturing complexity of each individual piece while maintaining the integrated functionality of the complete burner system
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 design extends burner lifetime by reducing heat flux and minimizing erosion, while maintaining efficient fuel oxidation and simplifying manufacturing by reducing the complexity of metal components.
Implementation Method 1
the central passage way has a downstream part wherein the diameter of the passage way increases over a first length and subsequently decreases over a second length terminating at the burner front
Implementation Method 2
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 is directed to a burner for the gasification of a solid fuel, comprising a burner front having an opening for discharging a solid fuel, wherein the opening for discharging the solid fuel is fluidly connected to a central passage way and wherein the central passage way has a downstream part wherein the diameter of the passage way increases over a first length and subsequently decreases over a second length terminating at the burner front and wherein inside the downstream part of the central passage way a hollow member is positioned, and wherein the hollow member has an internal increasing diameter and inner decreasing diameter aligned with the increasing and decreasing diameter of the hollow member and wherein the connecting conduits have a discharge opening positioned in the diverging part of the hollow member.