Reconstruction method for hearth three-dimensional temperature field

A three-dimensional temperature and furnace technology, which is applied in the combustion method, combustion chamber, safety device of the combustion chamber, etc., can solve the problems of difficulty in safe operation of boilers, and achieve the effect of compact structure, less consumables, and stable performance.

Inactive Publication Date: 2012-03-28
SHENYANG LIGONG UNIV
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Problems solved by technology

However, it mainly focuses on the judgment of whether the flame is "present" or "non-existent", and it is difficult to ensure the safe operation of the boiler to improve the operating economy, reduce pollutant emissions (clean combustion), and realize online diagnosis of combustion and other higher-level fields. develop

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Embodiment Construction

[0016] A method for reconstructing the three-dimensional temperature field of a furnace, using a high-temperature lens and a color CCD camera to obtain a color image of the combustion flame in the furnace, specifically including the following process:

[0017] (1) The picture of burning flame corresponds to 453×213 pixels, corresponding to the division of 40×30 area units

[0018] (2) Using the black body furnace calibration, select at least 36 sets of data as training samples (input layer R, G, B values, output layer temperature), after training the BP neural network model, obtain the burning flame picture corresponding to 40×30 area units Two-dimensional temperature value (the input layer is the R, G, and B values ​​of the average pixels in each area in the 40×30 area of ​​the burning flame picture, and the output layer is the two-dimensional temperature value in the corresponding area of ​​​​the burning flame picture).

[0019] (3) The two-dimensional temperature value corr...

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Abstract

The invention relates to a reconstruction method for a hearth three-dimensional temperature field. The method comprises the following steps that: a burning flame colorized image can be obtained through a CCD (Charge Coupled Device) image pickup system and a computer processing system, based on R,G and B pixels of a flame image, two-dimensional temperature of a burning flame image can be obtained through a neural network BP algorithm, an inverse solution of a radiative transfer equation can be combined, and three-dimensional temperature distribution of a burning flame in a hearth can be further obtained. The reconstruction method has the advantages of scientific design and creativeness, three-dimensional characteristic of coal dust in a large-scale boiler can be fully embodied, and the reconstruction method is significant to safety, economic benefit, clean operation and the like of the boiler. The system disclosed by the invention has the advantages of compact structure, less material consumption, long service life, stable and reliable performance, convenient for maintenance and high measurement precision of three-dimensional temperature, and flame combustion condition in the boiler can be controlled in time.

Description

technical field [0001] The invention relates to a temperature detection method, in particular to a three-dimensional temperature field reconstruction method based on a temperature image of a pulverized coal combustion flame in a furnace. Background technique [0002] At present, the traditional boiler combustion detection device generally adopts the method of industrial TV monitoring, that is, the furnace safety monitoring system, which judges the combustion status of the boiler through the color and brightness of the flame, so as to ensure that the combustion flame does not go out. Under various operating conditions such as shutdown, continuously and closely monitor the parameters and status of the combustion system, continuously carry out logical judgments and calculations, and issue action instructions when necessary, so that the combustion equipment can complete the operation in accordance with reasonable procedures to ensure the safety of boiler combustion . Howeve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23M11/04
Inventor 于洋刘晓阳
Owner SHENYANG LIGONG UNIV
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