A Measuring Method for Mixing Effect of Pulverized Coal and Furnace Heat Flow Based on Combustion Image
A technology of mixing effect and measurement method, applied in image analysis, image data processing, special data processing applications, etc., can solve the problem of little research on the mixing state of pulverized coal and heat flow, and achieve the effect of fast and accurate calculation
Inactive Publication Date: 2018-06-22
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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[0004] At present, there are many research results on boiler combustion monitoring based on combustion images, but there are very few studies on the mixing of pulverized coal and heat flow based on combustion images.
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[0029] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0030] During the combustion process of the boiler, the mixing effect of the pulverized coal and the heat flow in the furnace directly affects the ignition time and combustion efficiency of the pulverized coal. The mixing effect can be evaluated by the method of the present invention. The main steps are as follows: figure 1 shown.
[0031] Combustion images are collected by a flame image sensor, and the embodiment of the present invention uses a combustion image with a size of 320×240, see figure 2 .
[0032] According to the known installation position information of the flame image sensor, determine the centerline position and movement direction of the pulverized coal airflow in the combustion image. There are many possibilities for the centerline position and movement direction, but the centerline must be parallel to the movement direction...
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The invention discloses a measurement method of a coal dust and in-furnace heat flow mixing effect on the basis of a combustion image, and belongs to the technical field of thermotechnical measurement and image processing. The method comprises the following steps: firstly, carrying out edge detection on an unburned coal powder area in the combination image through an area first order difference algorithm with a fixed search direction, determining the mixing characteristic area of the coal dust and in-furnace heat flow, and carrying out block processing and gray level stage processing on the area. In the characteristic area, a gray parameter and a gray position distribution parameter which reflect a coal dust and in-furnace heat flow mixing situation are extracted, the gray parameter and the gray position distribution parameter construct a mixing coefficient which measurably evaluates the coal dust and in-furnace heat flow mixing effect, and therefore, the measurement of the coal dust and in-furnace heat flow mixing effect can be realized.
Description
technical field [0001] The invention belongs to the technical field of thermal measurement and image processing, in particular to a method for measuring the mixing effect of pulverized coal and heat flow in a furnace based on combustion images. Background technique [0002] The mixing of pulverized coal and heat flow in the furnace refers to the mixing of pulverized coal into the furnace and the heat flow medium in the furnace. The mixing effect of pulverized coal and heat flow in the furnace has an important impact on the combustion status in the furnace. If the mixing effect is not good, it will cause the following hazards: It is impossible to create good conditions for ignition and stable combustion, which affects the combustion of pulverized coal and increases the combustion time of pulverized coal; When the mixing effect of internal heat flow is poor, it will affect the normal combustion of pulverized coal, resulting in insufficient oxidation of pulverized coal, which w...
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IPC IPC(8): G06F19/00G06T7/11G06T7/13
CPCG16Z99/00
Inventor 刘禾胡叙畅杨国田于磊刘建松
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)