Master Controller Synchronizes Heating Ramps for Carbon Block Kiln Combustion
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Solution Overview
Problem
Current rotating fire chamber furnaces for baking carbonaceous blocks, such as anodes and cathodes for aluminum production, face issues with incomplete combustion in the lines of partitions due to independent fuel supply and air conditions, leading to high operating costs, fuel overconsumption, and clogging of ducts, which can result in safety risks and inefficient baking processes.
Innovation Solution
A method and device that optimize combustion by using a master controller to synchronize the operation of heating ramps, ensuring precise timing and oxygen availability for fuel injection, and limiting the number of injectors in simultaneous operation to maintain a nominal fuel flow rate, thereby controlling the combustion process and reducing unburned matter formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If multiple injectors operate simultaneously in heating ramps, then heating speed increases, but combustion completeness deteriorates and unburned matter increases
Solution Approach 1:
The patent implements periodic action by sequentially activating injectors in heating ramps rather than operating them simultaneously. The master controller coordinates injector operation in timed sequences, ensuring that each injector operates during a specific time window when oxygen is available in the partition lines. This periodic activation pattern maintains high heating speed while preventing oxygen depletion and ensuring complete combustion of fuel.
Solution Approach 2:
The patent applies preliminary action by pre-positioning air flows and oxygen supply before fuel injection occurs. The master controller anticipates the oxygen requirements of each injector and adjusts air flow rates in advance to ensure sufficient oxygen is available when the injector activates. This preliminary preparation of the combustion environment prevents incomplete combustion and unburned matter formation.
2Adaptability or versatility
If independent fuel supply is used in each heating ramp, then operational flexibility increases, but combustion optimization deteriorates leading to fuel overconsumption
Solution Approach 1:
The patent merges the control functions of multiple independent heating ramps into a single coordinated system managed by a master controller. While each heating ramp retains its independent fuel supply capability, the master controller synchronizes their operation, coordinates air flow distribution, and optimizes the overall combustion process. This merging of control authority enables global optimization of fuel consumption while preserving operational flexibility through centralized coordination.
Solution Approach 2:
The patent implements feedback mechanisms where the master controller monitors combustion parameters, air flow rates, and fuel consumption across all heating ramps. Based on this feedback information, the controller dynamically adjusts fuel supply and air flow to optimize combustion efficiency. This closed-loop control system prevents fuel overconsumption by continuously adapting the fuel supply to actual combustion needs while maintaining operational flexibility.
3Productivity
If more injectors operate simultaneously, then heating efficiency improves, but oxygen availability decreases leading to incomplete combustion
Solution Approach 1:
The patent resolves this contradiction by implementing periodic action through sequential injector operation. Instead of having all injectors operate simultaneously, the master controller activates them in timed sequences, ensuring that oxygen availability is maintained at each moment while still achieving high overall heating efficiency through coordinated multi-injector operation across different time windows.
Solution Approach 2:
The patent applies dynamics by making the injector operation schedule adaptable and variable. The master controller dynamically adjusts the timing, duration, and sequencing of injector operation based on real-time oxygen availability, air flow conditions, and heating requirements. This dynamic coordination enables the system to maintain high heating efficiency while preventing oxygen depletion through flexible, real-time optimization of the combustion process.
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 enhances combustion efficiency, reduces fuel consumption, minimizes the formation of unburned residues, and maintains a consistent temperature profile, leading to improved baking quality and reduced operational costs by ensuring complete combustion and precise control over the combustion process.
Implementation Method 1
optimize combustion in the lines of partitions of a so-called 'rotating fire(s)' chamber furnace for baking carbon blocks
Implementation Method 2
The necessary combustion air is partly injected by a blower ramp from the natural cooling zone, connected to at least one fan
Data Source
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AI summary
The invention relates to a method for optimising combustion in partition lines of a so-called rotary-burner chamber kiln for firing carbon blocks, said kiln comprising heating chambers, the fuel required for firing the carbon blocks being partially injected by at least two heating manifolds (16) directly controlled by a master controller (42a, 42b), which controls the inputs/outputs of said manifolds (16), the method including the automatic identification, by the master controller (42a, 42b), of the relative position of one manifold relative to the others when said manifold is connected to the grid, and the operation of the injectors of the heating manifolds (16) being organised by distributing the operating sequences of the injectors individually over time.