Combustion Chamber Symmetry Control via 2D Tomography
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Solution Overview
Problem
Current methods for optimizing combustion in power plants are limited by their inability to achieve a homogeneous distribution of fuel combustion across large areas, resulting in inefficient combustion processes and higher emissions.
Innovation Solution
A method and device that measure and evaluate real concentration and temperature distributions within the combustion chamber to control fuel combustion, ensuring symmetrical distributions by adjusting control parameters based on symmetry indices, using a combination of measurement technologies like CAT and evaluation techniques to optimize fuel combustion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional measurement methods (absorption spectroscopy, sonic pyrometry) are used, then measurement equipment can be installed, but only mean values of a line can be measured and homogeneous distribution cannot be achieved
Solution Approach 1:
The patent transitions from one-dimensional line measurements (absorption spectroscopy, sonic pyrometry) to two-dimensional plane measurements by arranging multiple measurement devices along a measurement line that extends through the combustion chamber, enabling measurement of concentration distributions across a broader spatial dimension
Solution Approach 2:
The measurement system is divided into multiple discrete measurement devices (tunable diode laser absorption spectroscopy devices) arranged along a measurement line, with each device contributing to the overall two-dimensional concentration distribution map through individual line-of-sight measurements
2Productivity
If measurement devices are arranged to measure concentration distribution, then better combustion optimization is achieved, but device complexity increases
Solution Approach 1:
The measurement system uses multiple instances of the same standardized measurement device (tunable diode laser absorption spectroscopy device) along the measurement line, allowing the system to achieve two-dimensional measurement capability while maintaining uniformity in device architecture and simplifying calibration and operation
Solution Approach 2:
The patent introduces an evaluation device that processes the raw measurement data from multiple measurement devices, calculates concentration distributions, determines symmetry indices, and generates control signals, thereby decoupling the complexity of data processing from the measurement devices themselves
3Manufacturing precision
If symmetrical concentration distribution is achieved through control, then combustion efficiency improves, but control system complexity increases
Solution Approach 1:
The control system continuously receives concentration distribution data from the measurement devices, calculates symmetry indices, compares them against target values, and automatically adjusts fuel and air supply parameters in real-time to maintain symmetrical concentration distributions, creating a closed-loop feedback control mechanism
Solution Approach 2:
The control system optimizes combustion by dynamically adjusting operational parameters (fuel supply rate, air supply rate, mixture ratio) based on the calculated symmetry index, transforming the control problem into a parameter optimization task that can be systematically managed
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 a largely homogeneous and low-emission combustion process with automatic adjustment of control parameters, improving combustion efficiency and reducing nitrogen oxide emissions.
Implementation Method 1
absorption spectroscopy is known as a method
Implementation Method 2
Sound pyrometry is known as an alternative measurement technique
Implementation Method 3
CAT measurement technology, computer-aided tomography, is known for calculating the temperature and concentration distribution
Data Source
Figure 1~2
Figure 3
AI summary
In a method and a device for optimizing the combustion of fuel in a combustion chamber of a power plant, a real concentration distribution of a material and/or a real temperature distribution in the combustion chamber is measured in at least one dimension, the real concentration distribution and/or temperature distribution is evaluated and the combustion of the fuel is controlled in such a way that a symmetric concentration distribution and/or temperature distribution in the at least one dimension arises, wherein during the evaluation at least one characteristic of the symmetry of the real concentration distribution and/or temperature distribution is determined, and during controlling at least one control parameter is changed depending on the at least one characteristic.