Gasification Fuel Injector Mixing Device
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Solution Overview
Problem
Existing fuel injectors for gasifiers are complex and costly due to multiple passages, with narrow operating windows, requiring frequent replacements when conditions change.
Innovation Solution
A gasification fuel injector with a mixing device that combines solid, liquid, or gaseous streams upstream of the tip portion, using only two passages - a mixture passage and an oxidizer passage - to simplify the design and improve mixing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple passages are used for fuel, oxygen, and other materials in existing fuel injectors, then the injection function is comprehensive, but the complexity and cost of the fuel injector increases
Solution Approach 1:
The patent combines multiple material streams (solid fuel, liquid fuel, gas, and oxidizer) into a single mixed stream passage. The mixing device integrates within the injector body, allowing all materials to be combined in one location and delivered through a single passage, thereby reducing the number of passages from multiple separate channels to one unified channel while maintaining comprehensive injection capability.
Solution Approach 2:
The single mixed stream passage serves multiple functions: it conveys the combined fuel-oxidizer mixture, replaces multiple separate fuel passages, and integrates the mixing function within the injector body. This multi-functional design eliminates the need for separate passages for each material type, reducing overall complexity.
2Adaptability or versatility
If multiple passages are used in existing fuel injectors, then various materials can be injected, but the cost of the fuel injector increases
Solution Approach 1:
By merging multiple material streams into a single mixed stream passage, the manufacturing process is simplified. Instead of machining and assembling multiple separate passages with precise alignments, the injector uses one unified passage that receives pre-mixed materials from the mixing device, reducing manufacturing steps and costs.
Solution Approach 2:
The mixing function is extracted as a separate mixing device that feeds into the injector. This allows the complex mixing operation to be performed externally or in a modular fashion, simplifying the injector body itself and reducing its manufacturing complexity and cost.
3Device complexity
If existing fuel injectors have narrow operating windows, then they are simple in design, but they require frequent replacements when operating conditions change
Solution Approach 1:
The mixing device is designed with adjustable parameters that allow it to adapt to different operating conditions. By modifying mixing ratios, flow rates, or material compositions in the mixing device, the system can dynamically respond to changing gasification requirements, expanding the operating window while maintaining a relatively simple injector structure.
Solution Approach 2:
The system allows parameter changes in the mixing device (such as mixing ratios, flow rates, and material properties) to accommodate different operating conditions. This flexibility enables the injector to maintain optimal performance across a wider range of conditions without requiring redesign or replacement of the injector itself.
4Device complexity
If existing fuel injectors have narrow operating windows, then the design is simple, but productivity decreases due to frequent replacements
Solution Approach 1:
The mixing device incorporates dynamic adjustment capabilities that allow it to adapt to varying operating conditions without requiring injector replacement. This extends the operational lifespan and reduces downtime, thereby improving productivity while maintaining design simplicity.
Solution Approach 2:
By enabling parameter changes in the mixing device (mixing ratios, flow rates, material compositions), the system can accommodate different gasification conditions and extend its operational window, reducing the frequency of replacements and improving overall productivity.
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 reduces complexity and cost, enhances mixing efficiency, and allows for adaptable operation across varying conditions by separating the oxidizer passage, preventing phase separation and ensuring well-mixed streams before reaction.
Implementation Method 1
a mixing device configured to mix together at least two of a solid stream, a liquid stream, or a gaseous stream, or a combination thereof, to generate a mixture
Data Source
AI summary
A system includes a gasification fuel injector. The gasification fuel injector includes a mixing device configured to mix together at least two of a solid stream, a liquid stream, or a gaseous stream, or a combination thereof, to generate a mixture. The mixing device is disposed upstream of a tip portion of the gasification fuel injector, and the mixture is discharged from the tip portion.