Composite Wood Fuel Pellets Ignition and Burn Duration
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Solution Overview
Problem
Existing wood products for grilling and heating, such as charcoal and traditional cordwood, face issues like quick burning, difficulty in ignition, excessive ash production, unpleasant flavors, and safety concerns due to sparking and popping, while manufactured logs have long burn duration but lack flame quality and aroma.
Innovation Solution
A composite wood product made with lignosulfonate, wood particles, and ground corn, which is compacted to high pressure to maintain integrity during burning, eliminating the need for petroleum-based binders and wax, and is designed for fast ignition and prolonged heat production without malodorous constituents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If natural wood pieces are used for grilling, then they produce natural wood flavor, but they burn too quickly or are difficult to light and do not emit enough heat
Solution Approach 1:
The patent uses compressed wood pellets as a composite material that combines the benefits of natural wood (flavor) with improved combustion characteristics (longer burn time, easier ignition). The compression process creates a denser fuel source that burns more slowly and consistently than loose wood pieces.
Solution Approach 2:
The patent changes the physical parameters of wood by compressing it into pellets at high density. This parameter change (from loose to compressed) fundamentally alters the burning characteristics, extending duration while maintaining the natural wood flavor profile.
2Duration of action of moving object
If charcoal is used as a replacement for wood, then burning duration is extended, but it does not emit the true flavor of wood and produces excessive ash
Solution Approach 1:
The patent uses wood pellets as a disposable fuel source that burns completely with minimal ash residue. Unlike charcoal that leaves significant ash, the compressed wood pellets are designed to combust thoroughly, leaving little to no ash behind.
3Stability of the object's composition
If charcoal or pellet products include binders to hold products together, then structural integrity is improved, but binders produce excess smoke and odors that impart unpleasant taste
Solution Approach 1:
The patent extracts and eliminates harmful binders (waxes, petroleum derivatives) from the fuel composition. By removing these problematic additives, the fuel burns cleaner with less smoke and no unpleasant odors, while still maintaining adequate structural integrity through compression alone.
Solution Approach 2:
The patent changes the binding mechanism from chemical binders to physical compression. The high-density compression provides sufficient structural integrity without requiring additional binding agents that would produce harmful emissions during combustion.
4Speed
If cordwood is used for fires, then fast burning is achieved, but the fire tends to spark, pop, and topple over during the burn process
Solution Approach 1:
The patent segments wood into uniform pellet sizes through compression. This segmentation creates consistent, predictable burning characteristics where each pellet burns steadily without the popping and sparking associated with irregular cordwood pieces.
5Duration of action of moving object
If manufactured logs with wax are used, then long burn duration is achieved, but flame quality and aroma are poor and thick foul-smelling smoke is produced
Solution Approach 1:
The patent uses wood pellets as a clean-burning disposable fuel that provides adequate burn duration without the harmful byproducts of wax logs. The pellets are designed to combust completely, producing minimal smoke and maintaining good flame quality throughout the burn.
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 composite wood product burns at higher temperatures for extended periods, producing minimal ash and a pleasant aroma, is safe from sparking, and suitable for various grilling and heating applications, offering improved cooking and heating performance compared to traditional wood and charcoal.
Implementation Method 1
the composite wood product burns at higher temperatures for extended periods
Implementation Method 2
the product is made with lignosulfonate, wood particles, and ground corn, which is compacted to high pressure
Data Source
AI summary
A composite wood product adapted for burning includes a compacted mixture of lignosulfonate, wood particles, and ground corn. A method of manufacturing the composite wood product includes: (i) providing and mixing the lignosulfonate, the wood particles, and the ground corn to form a mixture having a moisture content from about 6 wt. % to about 18 wt. %; compacting the mixture at high pressure; and drying the mixture to obtain an optimum moisture level for burning. The composite wood product may be provided in a kit that includes log-shaped pieces and starter pieces.