Fuel Analyzer Condition Adjusting Device for NOx Estimation
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Solution Overview
Problem
Conventional methods for estimating NOx and unburned combustible contents in thermal power plants require several days to a week for high-accuracy industrial analysis, leading to potential deviations between analyzed and actual fuel characteristics, resulting in analysis errors that affect estimation accuracy.
Innovation Solution
A simple fuel analyzer with an analysis condition adjusting device that calculates reference and varied NOx and unburned combustible estimation values, computes errors, sets tolerance ranges, and adjusts analysis conditions to ensure estimation values fall within specified limits, thereby ensuring accurate analysis within a shorter time frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional industrial analysis methods are used to obtain high-accuracy fuel analysis values, then measurement precision is improved, but loss of time increases significantly (several days to one week)
Solution Approach 1:
The conventional industrial analysis process is segmented into multiple simplified measurement steps. The fuel analysis is divided into separate component measurements (moisture, volatile matter, fixed carbon, ash) that can be performed independently and rapidly, rather than as a single lengthy process. This segmentation enables the simple fuel analyzer to achieve acceptable precision without requiring the full duration of conventional analysis methods.
2Measurement precision
If conventional industrial analysis methods are used, then measurement precision is improved, but reliability deteriorates due to deviation between analyzed and actual fuel characteristics
Solution Approach 1:
The system implements feedback control by comparing the simple fuel analyzer's measurements with actual fuel characteristics and adjusting the analysis conditions accordingly. The analysis condition adjusting device uses the measured fuel properties to refine and optimize analysis parameters, ensuring that rapid measurements remain reliable and accurately reflect actual fuel characteristics. This closed-loop feedback mechanism maintains estimation accuracy despite the reduced analysis time.
3Loss of time
If simple fuel analyzer is used to reduce analysis time, then loss of time is reduced, but measurement precision deteriorates
Solution Approach 1:
The analysis condition adjusting device dynamically changes measurement parameters based on the specific fuel sample being analyzed. By adjusting analysis conditions (such as heating rates, measurement temperatures, and timing) according to the fuel's actual characteristics, the simple fuel analyzer achieves measurement precision comparable to conventional methods while maintaining rapid analysis times. This adaptive parameter adjustment allows the simplified device to compensate for its inherently shorter measurement duration.
Data Source
AI summary
An analysis condition adjusting device of a fuel analyzer includes a first NOx computing unit for calculating a reference NOx estimation value using a previously obtained first industrial analysis value of a fuel sample, a second NOx computing unit for calculating a plurality of varied NOx estimation value by varying a value of each of components of the first industrial analysis value, a NOx error computing unit for computing an error as a NOx error between the reference NOx estimation value and each of the varied NOx estimation values, an analysis error tolerance range setting unit for setting an analysis error tolerance range of each of the components based on a value variation amount of each of the components, the value variation amount being defined such that the NOx error is within a tolerance range, and an analysis condition adjusting unit for adjusting an analysis condition of a fuel analyzer.