Portable Combustion System with Dual Air Sources and Automated Ash Removal
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Solution Overview
Problem
Current portable combustion systems for vegetative waste and biomass incineration face challenges such as high transportation costs, cumbersome relocation, inadequate combustion air supply, lack of automated ash removal, and inefficient ignition and feeding mechanisms, leading to inefficient and hazardous operations.
Innovation Solution
A portable combustion system with a combustion chamber that receives air from both top and bottom, featuring a preheated second source of combustion air, an auger system for ash removal, and a camera for monitoring combustion, allowing for efficient and continuous operation without the need for supplemental fuels and minimizing manual handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a portable combustion system is designed to be movable and repositionable, then ease of operation is improved, but device complexity increases due to transportation and assembly requirements
Solution Approach 1:
The combustion system is divided into modular components including a combustion chamber assembly, support frame with wheels, and separate hopper sections that can be independently handled during transport and assembly, reducing the complexity of moving the entire system at once
Solution Approach 2:
The support frame incorporates wheels and movable mounting mechanisms that allow the combustion chamber to be easily repositioned and adjusted at the job site, improving ease of operation while keeping the overall system design relatively simple
2Productivity
If combustion air is supplied only from the top, then device complexity is reduced, but combustion efficiency deteriorates due to inadequate air supply to the lower portion of the combustion chamber
Solution Approach 1:
Air supply is extended from a single top-down dimension to multiple dimensions by adding side air inlets and bottom air inlets to the combustion chamber, enabling three-dimensional air distribution that improves combustion efficiency throughout the entire chamber volume
Solution Approach 2:
Different regions of the combustion chamber are provided with air supply tailored to their specific needs: top air inlets for upper combustion zones, side air inlets for mid-section oxygenation, and bottom air inlets for lower combustion areas, optimizing combustion efficiency locally throughout the chamber
3Productivity
If ash removal is performed manually, then device complexity is reduced, but productivity deteriorates due to time-consuming and tedious ash removal operations
Solution Approach 1:
The ash removal system is designed to be easily operated by the user through simple mechanical means such as a dump hopper or manual auger mechanism that requires minimal effort to activate, providing automated or semi-automated ash removal without adding significant system complexity
Solution Approach 2:
Instead of actively removing ash through complex mechanical means, the system inverts the approach by using a dump hopper or tilting mechanism that allows ash to passively discharge under gravity when the hopper is tipped, simplifying the ash removal process while improving productivity
4Reliability
If supplemental fuels are used for ignition, then reliability of ignition is improved, but safety deteriorates due to potential hazardous situations
Solution Approach 1:
The ignition system replaces chemical supplemental fuels with an electrical or electronic ignition mechanism such as an electric heater element or spark generator that directly heats or ignites the waste material, maintaining reliable ignition while eliminating the safety hazards associated with storing and handling flammable liquids
Solution Approach 2:
An intermediary heating element or ignition device is introduced between the waste material and the need for supplemental fuel, providing a controlled and safe ignition source that mediates the transition from unburned to burning state without requiring hazardous chemicals
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 and complete combustion of vegetative waste and biomass, simplifies transportation and operation, and extends the duration between servicing by automating ash removal and providing real-time combustion monitoring.
Implementation Method 1
a first source of combustion air supplied across a top of the combustion chamber to form an air curtain
Implementation Method 2
the second source of combustion air being preheated prior to the second source of combustion air passing through a plurality of openings formed in a perforated plate and entering into the combustion chamber
Implementation Method 3
designed to incinerate all types of vegetative waste, biomass, processed wood, chips, bark, ground wood, and other municipal solid waste
Data Source
AI summary
A combustion/carbonizing system which comprises a base frame and a combustion chamber frame which is pivotably attached to the base frame. The combustion chamber frame defines an open top combustion chamber having a bottom perforated plate. A plenum is formed below the perforated plate for collecting biochar which passes therethrough. A first source of combustion air is supplied across the top of the combustion chamber while a second source of combustion air passes through the perforated plate into the combustion chamber. The combustion/carbonizing system is capable of operating in a continuous manner for combustion wood or waste material to the desired degree required by the end user for the purpose of reducing the volume of the material as well as the associated emissions while generating valuable char and boichar as an end product. For some applications, the combustion/carbonizing system may be operated to combust completely the wood or waste material.