Biomass Heating Apparatus with Segmented Combustion
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Solution Overview
Problem
Existing biomass heating stoves using pyrolysis have poor performance, limited versatility, and produce high pollutant emissions due to inefficient combustion and nitrogen oxide formation.
Innovation Solution
A heating apparatus with a brazier for thermochemical decomposition of biomass and a separate combustion chamber, utilizing conveyor means to direct combustible gases to the combustion chamber and recirculation means to manage air flow and reduce oxygen levels, thereby minimizing pollutant emissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If ambient air is introduced into the brazier to complete combustion, then combustion is completed, but nitrogen oxide production increases
Solution Approach 1:
The invention divides the combustion process into two separate chambers: a brazier for pyrolysis and a combustion chamber for combustion. This segmentation allows the brazier to operate with limited oxygen for pyrolysis while the separate combustion chamber handles complete combustion with controlled air introduction, reducing nitrogen oxide formation.
Solution Approach 2:
The invention introduces an intermediary combustion chamber between the brazier and the external environment. This intermediate chamber allows controlled mixing of combustible gases with air, acting as a buffer that prevents direct introduction of large amounts of ambient air into the brazier, thereby reducing nitrogen oxide production.
2Productivity
If biomass is completely consumed by pyrolysis, then combustion process ends, but operator intervention is required for reloading
Solution Approach 1:
The invention implements automatic feeding mechanisms and control systems that enable the apparatus to load and monitor biomass consumption automatically. The system can detect when biomass is depleted and initiate reloading operations without requiring constant operator intervention, improving ease of operation while maintaining high productivity.
3Productivity
If primary air is introduced to create flame cap, then combustion is promoted, but pollutant emissions increase
Solution Approach 1:
The invention separates the flame cap formation function from the main combustion process by introducing primary air selectively in the combustion chamber rather than directly into the brazier. This allows flame cap promotion without excessively increasing oxygen levels in the pyrolysis zone, thereby reducing pollutant emissions.
Solution Approach 2:
The invention applies different air introduction strategies to different zones: limited air to the brazier for pyrolysis and controlled air to the combustion chamber for flame cap formation. This local differentiation allows combustion promotion where needed while minimizing pollutant generation in the pyrolysis zone.
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 reduced pollutant emissions and improved heat management by optimizing the combustion process and minimizing nitrogen oxide production, while maintaining efficient operation and reduced operator intervention.
Implementation Method 1
a brazier suitable to thermochemically decompose a biomass and produce at least one combustible gas
Implementation Method 2
a combustion chamber which is autonomous with respect to the brazier, is delimited by a plurality of walls and is suitable to develop heat by means of a flame
Data Source
Figure 1~3
Figure 4~6
Figure 7
AI summary
Heating apparatus (10, 100, 200, 300) comprising both a brazier (11) which in turn comprises a first entry aperture (16) to receive a biomass (C) which functions as fuel and a second aperture (18) to receive a first comburent (F1), and also a combustion chamber (20) which is autonomous with respect to said brazier (11), the heating apparatus (10, 100, 200, 300) being delimited by a plurality of walls (22, 23, 24, 25, 26) and suitable to develop heat by means of a flame.