Powdered Fuel Dispersion Combustion Control
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Solution Overview
Problem
Existing alternative fuel systems for powdered fuels lack the operational benefits of petroleum-based systems, such as on/off functionality, quick response to performance demands, and produce pollution and inefficiencies like excess carbon monoxide and unpleasant odors.
Innovation Solution
A method involving the metering of explosible powder into an oxidizing gas using a positive displacement powder dispersion device to create a controlled stream, which is ignited to produce a stationary deflagrating combustion wave, allowing for precise control of combustion and efficient energy production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If pellet-burning wood stoves and coal-fed cyclone furnaces are used, then alternative fuel combustion is achieved, but the systems lack on/off functionality and cannot quickly respond to performance demands
Solution Approach 1:
The patent changes the physical state of the fuel from solid pellets to fine powder, and changes the combustion mode from solid-phase burning to suspended particle combustion in a controlled atmosphere. This allows the fuel to be introduced in a controlled manner similar to gas burners, enabling instant on/off functionality and quick response to performance demands while maintaining reliable combustion control through parameters like powder feed rate, air-to-fuel ratio, and combustion chamber temperature.
2Object-generated harmful factors
If existing wood boilers and powder-based systems are used, then alternative fuel combustion is achieved, but they produce pollution worse than petroleum-based systems including unpleasant odors and large particulates
Solution Approach 1:
The patent changes the combustion parameters by suspending fine powder particles in a controlled atmosphere with optimized oxygen concentration and temperature. The fine particle size (1-100 micrometers) increases surface area for complete combustion, while the controlled atmosphere prevents incomplete combustion products. This eliminates unpleasant odors and large particulates while achieving high combustion efficiency through complete fuel oxidation.
Solution Approach 2:
The patent uses a controlled atmosphere with optimized oxygen concentration to accelerate the oxidation process. By providing sufficient oxygen in the combustion zone and maintaining appropriate temperature, the system achieves complete combustion of the powdered fuel, converting it fully to carbon dioxide and water vapor without producing harmful incomplete combustion products like carbon monoxide, unburned hydrocarbons, or large particulates.
3Loss of energy
If existing alternative fuel systems are used, then fuel combustion is achieved, but they produce excess carbon monoxide and do not provide efficient combustion
Solution Approach 1:
The patent changes the combustion parameters by using fine powdered fuel (1-100 micrometers) suspended in a controlled atmosphere with optimized oxygen concentration and temperature. The fine particle size provides large surface area for rapid and complete combustion, while the controlled atmosphere ensures sufficient oxygen supply. This eliminates carbon monoxide production by achieving complete oxidation of carbon to carbon dioxide, while maximizing energy efficiency through complete fuel consumption.
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
This approach enables clean, dependable, and efficient combustion with instant ignition and sustained burning, producing a soot-free and odor-free flame, and is safer than petroleum products, with the ability to combust various materials without modification.
Implementation Method 1
metering a substantially explosible powder into an oxidizing gas using a positive displacement powder dispersion device to suspend the powder in the gas
Implementation Method 2
igniting the dispersion with an ignition source to produce a stationary deflagrating combustion wave
Implementation Method 3
igniting the dispersion in a combustion area to produce a stationary deflagrating wave
Implementation Method 4
igniting the dispersion in a combustion area to produce a stationary deflagrating wave such that a conductive heat transfer from combustion brings the powder to combustion temperature
Data Source
AI summary
Methods of combustion include metering a substantially explosible powder into an oxidizing gas using a positive displacement powder dispersion device to suspend the powder in the gas and directing the powder in the gas to form a controlled stream of a moving explosible powder dispersion. In some embodiments, the method further includes igniting the dispersion with an ignition source to produce a stationary deflagrating combustion wave and sustaining combustion by continuing to meter the powder into the gas. In other embodiments, the method further includes adjusting a nozzle velocity of the dispersion to reflect properties of the dispersion to create a sustainable flame and igniting the dispersion to produce a stationary deflagrating wave of the dispersion. In other embodiments, the method further includes igniting the dispersion in a combustion area to produce a stationary deflagrating wave such that a conductive heat transfer from combustion brings the powder to combustion temperature.