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Coal-fired power plant furnace chamber flame judging method based on double images

A coal-fired power plant, double-image technology, applied in the direction of combustion control, instruments, character and pattern recognition, etc., can solve the problems of energy waste, heavy pollution, long service life, etc., achieve accurate automatic monitoring and control, and realize safety, The effect of the simple and easy-to-understand discrimination method

Inactive Publication Date: 2014-08-27
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the coal consumption of my country's industrial coal-fired boilers accounts for about a quarter of my country's total coal consumption, and most of the industrial boilers in use are boilers with a long service life, with low efficiency and high pollution
The automatic control level of these boilers is not high, which seriously affects the combustion efficiency of the boiler
The traditional control method cannot timely and effectively control the combustion of boiler coal in the best state, and also limits the operating efficiency of boiler equipment and auxiliary equipment, resulting in energy waste and pollutant emissions that cannot meet the standards

Method used

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  • Coal-fired power plant furnace chamber flame judging method based on double images
  • Coal-fired power plant furnace chamber flame judging method based on double images
  • Coal-fired power plant furnace chamber flame judging method based on double images

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0021] 1. Acquisition of the original double image of the furnace flame

[0022] Select an appropriate dual-image acquisition system (such as two infrared flame detectors with an image capture angle of 90° and installed in a horizontal position) to obtain the original image of the real-time combustion furnace flame, and transmit the acquired flame image to the host computer through the data line, and then The center of mass of the flame image is determined by processing and computing the two images acquired by the host computer.

[0023] First of all, considering the instability of the furnace flame conditions, the obtained original image contains more noise factors, which affects the clarity of the image, so the original image is pre-processed first;

[0024] 2. Preprocessing of each original single image

[0025] According to the effective characteristics of the flame image, in order to suppress the noise caused by various interferences in the boiler, imaging process, and s...

example 1

[0060] Below to image 3 The spatial structure image is shown to illustrate the calculation of the centroid offset distance of the actual flame image:

[0061] like image 3 As shown, if the original centroid is at point O, and the current flame centroid is M, a flame image is obtained on the XOY plane, and the offset distance OL is calculated. If the OL value is greater than the set effective fluctuation area, an early warning or alarm will be issued without Then calculate the offset distance of the actual flame burning center of mass; similarly, get the flame image on the vertical XOY plane on the YOZ plane, and calculate the offset distance ON. If the ON value is greater than the set effective fluctuation area, a direct warning or alarm will be issued.

[0062] Calculate the center of mass point M of the actual flame combustion from OL and ON to get OM, and the amount of pulverized coal and hot air is determined by the value of OM.

[0063] The coal-fired boiler in a powe...

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Abstract

The invention provides a coal-fired power plant furnace chamber flame judging method based on double images. The flame judging method includes the following steps that (1), the two furnace chamber flame images with the same time and different angles are obtained; (2), with the barycentric coordinate of a furnace chamber flame normal state tangent circle as the datum, the barycenter offset distances, in the planes where the flame images are located, of the flame images are respectively calculated; (3), the actual barycenter offset distance of furnace chamber flames is calculated according to the two barycenter offset distances; (4), the actual barycenter offset distance is compared with a preset effective area, and if the actual barycenter offset distance exceeds the preset effective area, an early warning is given. The two flame images are selected for analysis, so that the combustion state of the furnace chamber flames is judged from different angles, real-time operating characteristics are obtained, and then combustion safety and stability of the coal-fired power plant furnace chamber flames are judged.

Description

technical field [0001] The invention relates to the technical field of coal power generation, in particular to a method for judging a furnace flame in a coal-fired power plant based on double images. Background technique [0002] During the power generation process of the power plant, the controlled object is the combustion flame in the furnace, and the premise to promote the normal combustion of the flame is a stable high-temperature pulverized coal supply. The main hardware equipment for regulating the flame in the furnace is the valve (baffle) mechanism in the pipeline, and the most important accident prevention during the normal operation of the boiler is to prevent sudden changes in the delivery volume of high-temperature pulverized coal in the pipeline and avoid clusters of coal The fire may be suddenly extinguished under the high pressure of the furnace due to the congestion of pulverized coal transportation, causing major accidents and even boiler explosions. The pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/40G06K9/46F23N5/00
Inventor 陈荣保肖本贤费敏锐朱勇军卞敬慈孟芳慧
Owner HEFEI UNIV OF TECH
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