Segmented Air Feeding for Biomass Gasifier Combustion Control
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Solution Overview
Problem
Existing biomass gasification systems lack efficient air feeding mechanisms, gas cleaning systems, and ash discharging systems, which hinder complete combustion and flame control, especially when using various types of solid fuels.
Innovation Solution
The apparatus includes a solid fuel feeding unit, a gas producing unit, an air feeding unit with multiple air feeding parts, an ash trapping unit using centrifugal force, and an ash discharging unit, allowing for complete combustion, efficient gas cleaning, and controlled flame intensity, suitable for biomass or coal fuels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple air feeding system is used in the gasifier, then the device complexity is reduced, but the combustion completeness deteriorates due to insufficient air distribution control
Solution Approach 1:
The air feeding system is divided into multiple air feeding parts (first, second, third, and fourth air feeding parts) that supply air to different locations within the gasifier and ash trapping unit. This segmentation allows precise control of air distribution to different zones, ensuring complete combustion while maintaining a relatively simple overall structure.
Solution Approach 2:
Different air feeding parts are positioned at specific locations (lower gas producing part, upper gas producing part, ash trapping unit wall, and burner unit) to provide localized air supply where needed. This ensures optimal air-fuel ratio in each zone for complete combustion without requiring a complex centralized system.
2Device complexity
If no gas cleaning system is implemented, then the device complexity is reduced, but the flame quality deteriorates due to impurities in the fuel gas
Solution Approach 1:
The ash trapping unit is designed as a separate component that functions as a gas cleaning system, distinct from the gasifier chamber. This segmentation allows effective removal of fly ash and dust from fuel gas before combustion without complicating the overall apparatus structure.
Solution Approach 2:
The ash trapping unit acts as an intermediary between the gasifier and the burner, capturing and removing impurities (fly ash and dust) from the fuel gas. This intermediary component ensures clean high-temperature flames while maintaining a relatively simple system architecture.
3Device complexity
If no ash discharging mechanism is provided, then the device complexity is reduced, but the productivity deteriorates due to ash accumulation in the gasifier
Solution Approach 1:
The ash discharging system is divided into separate bottom ash discharging and fly ash discharging parts, each handling different types of ash from different locations. This segmentation enables continuous operation by efficiently removing ash without requiring a complex integrated disposal mechanism.
Solution Approach 2:
The ash trapping unit and discharging parts are designed to automatically separate and discharge ash based on the gas flow and centrifugal forces, reducing the need for complex mechanical removal systems while maintaining continuous operation capability.
4Device complexity
If a single air feeding point is used, then the device complexity is reduced, but the flame temperature control deteriorates due to inadequate air distribution
Solution Approach 1:
The air feeding mechanism is segmented into four distinct air feeding parts positioned at different locations (lower gas producing part, upper gas producing part, ash trapping unit, and burner unit). This segmentation provides precise control over air distribution, enabling effective flame temperature control while maintaining relatively simple device structure.
Solution Approach 2:
Air is supplied at multiple local points throughout the gasifier and combustion system rather than at a single location. This local quality approach ensures optimal air-fuel mixing and temperature control in each zone, achieving clean high-temperature flames without complex temperature regulation mechanisms.
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 apparatus achieves complete combustion, clean high-temperature flames, and efficient ash discharge, enabling effective gasification reactions with various solid fuels by optimizing air distribution and ash separation processes.
Implementation Method 1
an ash trapping unit connected to the gas producing unit for separating fly ash and dust from the fuel gas
Data Source
AI summary
An apparatus for fuel gas production and combustion comprises a solid fuel feeding unit for receiving and feeding solid fuel; a gas producing unit being connected to the solid fuel feeding unit for receiving solid fuel from the solid fuel feeding unit; an air feeding unit connected to the gas producing unit for feeding air to the gas producing unit to cause a gasification reaction; an ash trapping unit connected to the gas producing unit for separating fly ash and dust from the fuel gas; a burner unit connected to the ash trapping unit for combusting the fuel gas; and an ash discharging unit connected to the gas producing unit and ash trapping unit and comprising a bottom ash discharging part and a fly ash discharging part, characterized in that the air feeding unit comprises a plurality of air feeding parts wherein at least one air feeding part being connected to the gas producing unit and at least one air feeding part being connected to the ash trapping unit.