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Fresh fuel online identification method

An identification method and fuel technology, which are applied in chemical analysis using combustion and photometry using electrical radiation detectors, can solve problems such as misjudgment, and achieve the effects of convenient maintenance, high cost performance and good real-time performance.

Inactive Publication Date: 2010-02-10
BEIHANG UNIV
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Problems solved by technology

Since the output of the soft-sensing technology used only corresponds to known fuel types, when a new fuel with different combustion characteristics is put in, the new fuel will also be judged as a known fuel type, resulting in misjudgment

Method used

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Embodiment Construction

[0031] In order to enable those of ordinary skill in the art to clearly understand the technical scheme of the present invention, the specific embodiments of the present invention will be further described in conjunction with the accompanying drawings:

[0032] Specific implementation method:

[0033]Phase 1. Establish a joint probability density model of known fuel combustion eigenvalue distribution, including eigenvalue extraction, data processing and model establishment, such as figure 1 As shown, the steps are as follows:

[0034] Step 1, extracting the eigenvalues ​​of the flame radiation signal in the time domain and frequency domain from the flame radiation signal of known fuel combustion as the original eigenvalue of the flame.

[0035] Use three photoelectric sensors to obtain the radiation signals of J kinds of known fuel combustion flames in the infrared, visible and ultraviolet bands. Each fuel collects M groups of signals, and each group includes 3 signals, then ...

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Abstract

The invention discloses a fresh fuel online identification method comprising two stages: in the first stage, establishing a joint probability density model of known fuel characteristic value distribution; extracting characteristic values of a flame radiation signal in a time domain and a frequency domain from a known fuel burning flame radiation signal, and taking the characteristic values as flame original characteristic values; changing the flame original characteristic values into mutually uncorrelated orthogonalized characteristic value data through orthogonalized data processing; utilizing the obtained orthogonalized characteristic value data to establish the joint probability density model of each known fuel characteristic value distribution; in the stage two of fresh fuel online identification, extracting characteristic values of a to-be-identified fuel burning flame radiation signal in the time domain and the frequency domain, and taking the characteristic values as original characteristic values; carrying out orthogonalized data processing on the original characteristic values; inputting the obtained orthogonalized characteristic value data to the joint probability densitymodel of each known fuel characteristic value distribution so as to obtain a probability density value that the to-be-identified fuel belongs to each known fuel, and judging the type of the to-be-identified fuel according to the probability density value and judging whether the to-be-identified fuel is a new fuel or not.

Description

technical field [0001] The invention relates to an online identification method for new fuel, belonging to the technical field of industrial boiler fuel type identification. Background technique [0002] In order to improve the utilization of fuel resources, reduce pollutant emissions, and improve the thermal efficiency of boilers, it is necessary to establish and maintain efficient and stable combustion in boilers. Unstable combustion not only leads to low combustion thermal efficiency and substandard pollutant emissions, but in extreme cases can even lead to fire extinguishing of the boiler furnace. Improper handling can easily lead to furnace deflagration accidents. Due to economic and other factors, industrial boilers usually need to burn different types of fuels. The type of fuel at the time of combustion is generally unknown and unpredictable. The change of fuel type makes the combustion of the boiler more complicated, directly affects the stability of the flame comb...

Claims

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Application Information

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IPC IPC(8): G01N31/12G01J1/42
Inventor 徐立军谭丞曹章
Owner BEIHANG UNIV
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