Solid Fuel Injector with Multi-Angle Gas Passages for IGCC Efficiency
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Solution Overview
Problem
Existing gasifier fuel injectors in IGCC power plants do not optimally inject carbonaceous fuels, leading to inefficiencies in fuel efficiency and burn characteristics during the gasification process.
Innovation Solution
A solid fuel injector system with multiple passages for controlled injection of solid fuel and gases, allowing for varying flow rates and angles to create a conical spray cone, optimized by a gasification controller for enhanced gasification performance and component lifespan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a conventional single-pass fuel injector is used, then the device complexity is low, but the fuel efficiency and burn characteristics are insufficient
Solution Approach 1:
The fuel injection system is segmented into multiple independent passages (first fuel passage, second fuel passage, first gas passage, second gas passage) that can be controlled separately. This segmentation allows different fuel and gas streams to be injected with different flow rates, angles, and timing, optimizing combustion efficiency while managing the complexity through modular design
Solution Approach 2:
The system employs dynamic control of flow rates and injection angles for each passage independently. The fuel injector controller dynamically adjusts the flow rate and angle of each passage based on operating conditions, enabling adaptive optimization of fuel efficiency without requiring a fundamentally complex mechanical structure
2Reliability
If multiple gas passages with different angles are used, then the burn characteristics are improved, but the manufacturing precision requirements increase
Solution Approach 1:
Each gas passage is designed with specific local qualities - different angles (first angle for first gas passage, second angle for second gas passage), different flow rates, and different positioning relative to the fuel passages. This local differentiation optimizes the burn characteristics by creating specific flow patterns and mixing zones, while the precision requirements are managed by focusing complexity only where needed in each passage
3Productivity
If controlled spray cone size and angle are implemented, then the gasification performance increases, but the control system complexity increases
Solution Approach 1:
The system controls spray cone characteristics by changing parameters (flow rate, injection angle) of the gas and fuel passages. By adjusting these parameters dynamically, the spray cone size and angle are optimized for gasification performance, while the control complexity is managed through electronic control rather than mechanical complexity
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 system improves fuel efficiency and burn characteristics by controlling the size and opening angle of the spray cone, leading to increased gasification performance and reduced wear on IGCC components.
Implementation Method 1
The first gas passage is configured to inject a first gas through a first gas outlet in a first gas direction. The second gas passage is configured to inject a second gas through a second gas outlet in a second gas direction.
Data Source
AI summary
Systems and methods for injection of feedstock are included. In one embodiment, a system includes a solid fuel injector. The solid fuel injector includes a solid fuel passage, a first gas passage, and a second gas passage. The solid fuel passage is configured to inject a solid fuel through a fuel outlet in a fuel direction. The first gas passage is configured to inject a first gas through a first gas outlet in a first gas direction. The second gas passage is configured to inject a second gas through a second gas outlet in a second gas direction. The first gas direction is oriented at a first angle relative to the fuel direction. The second gas direction is oriented at a second angle relative to the fuel direction, and the first and second angles are different from one another.