Helical Piston Solid Fuel Burner for Complete Combustion
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Solution Overview
Problem
Burners for solid fuel particles face challenges in delivering consistent energy output due to inconsistent particle sizes and high combustion temperatures, which lead to material degradation and increased costs for high-temperature resistant materials, while existing systems are inefficient in processing low-grade fuels and producing pollutants.
Innovation Solution
A burner system using a helical piston to deliver fuel particles at an inclined angle, combined with oxygen enrichment through pressure swing adsorption, achieving high combustion temperatures and complete burning, thus reducing material stress and pollutant production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high combustion temperature operations are used to achieve complete burning, then combustion efficiency is improved, but material degradation and corrosion of burner components worsen
Solution Approach 1:
The patent introduces a refractory material lining as an intermediary between the high-temperature combustion zone and the burner components. This refractory barrier protects the metallic components from direct exposure to extreme temperatures, reducing thermal stress and material degradation while allowing the combustion process to operate at high temperatures for complete burning.
Solution Approach 2:
The patent changes the thermal parameters of the burner system by introducing active cooling mechanisms and thermal insulation layers. This allows the combustion chamber to maintain high temperatures for efficient combustion while the external components operate at lower temperatures, preventing material degradation and extending component life.
2Stability of the object's composition
If consistent particle size is maintained to stabilize energy output, then energy consistency is improved, but fuel flexibility and adaptability worsen
Solution Approach 1:
The patent employs a dynamic particle size classification system that can adjust its operation based on the type of fuel being processed. The classification mechanism can dynamically adapt its parameters to handle different fuel types (pellets, chips, shavings) while maintaining consistent energy output, thus providing both stability and adaptability.
Solution Approach 2:
The patent designs a universal fuel processing system that can handle multiple fuel types with varying particle sizes. The system incorporates adjustable classification and feeding mechanisms that can be configured for different fuel types, allowing the burner to maintain consistent energy output regardless of the specific fuel being used.
3Stability of the object's composition
If mechanical feed systems operate at constant speeds to deliver consistent energy, then energy stability is improved, but handling of fluffy bulk fuel worsens
Solution Approach 1:
The patent replaces the constant-speed mechanical feed system with a controlled dispensing mechanism that responds to fuel bed conditions. This system uses sensors to detect fuel density and composition, then adjusts the feed rate accordingly, enabling consistent energy delivery while effectively handling fluffy or variable bulk fuel without requiring constant mechanical speed.
Solution Approach 2:
The patent implements a feedback-controlled feed system that continuously monitors fuel bed characteristics and adjusts the feeding mechanism in real-time. This feedback loop ensures consistent energy delivery by adapting the feed rate to the actual fuel conditions, making the system effective for fluffy bulk fuel while maintaining energy stability.
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 enables efficient, complete combustion of low-grade fuels, reducing NOx emissions and material costs, while allowing the use of lower-cost materials for burner components and capturing heat energy for CHP systems.
Implementation Method 1
oxygen enrichment through pressure swing adsorption
Implementation Method 2
achieving high combustion temperatures and complete burning
Data Source
AI summary
A burner for solid particle fuels such as shavings or pellets. The invention includes a helical piston to deliver fuel particles up an inclined tube into a cup having an oxygen delivery tube for combustion. The helical piston is axially extendable and retractable to first advance material up the tube without rotation, and then retract with rotation so as to screw itself into the next charge of material to be advanced. Combustion heat may be used to drive a Stirling engine or other mechanism for converting heat into other useful energy or power, such as using the burner as a component of a combined heat and power (CHP) system.