Method for observing blast furnace coal injection condition

Abstract

The invention discloses a method for observing blast furnace coal injection condition, and belongs to the technical field of blast furnace coal injection device condition monitoring. The method comprises the steps that an imaging plate which directly faces a peephole of a blast furnace tuyere is erected on the outer side of the peephole of the blast furnace tuyere; an included angle between a camera shooting module and the imaging plate is obliquely arranged between the peephole of the blast furnace tuyere and the imaging plate, the camera shooting module records images on the imaging plate and transmits the images to an image acquisition module; the image acquisition module is used for converting the images into grayscale images; and the grayscale images are converted into coal injection images through binarization processing, wherein a coal briquette in the coal injection images is represented by black, and the rest part is represented by white; the ratio N of the black area to the white area is calculated, and when the N is smaller than or equal to a set value, a coal gun is blocked. According to the method for observing the blast furnace coal injection condition, the distance between the camera shooting module and a blast furnace is extended, a cooling device of the camera shooting module is omitted, so that the cost is reduced; the condition of the coal gun can be judged by processing the images on the imaging plate, so that manual observation of the working condition of the coal gun in the furnace is not obstructed.

Description

technical field [0001] The invention relates to a method for observing the coal injection situation of a blast furnace, and belongs to the technical field of state monitoring of a blast furnace coal injection device. Background technique [0002] In the actual production of the blast furnace, the water coal workers of the blast furnace often find that the tuyere is blocked, and the coal gun needs to be purged in time to ensure normal coal injection. The analysis found that there are two reasons for the blocked gun: (1) The volatile content of the pulverized coal is too high, and the colloid is layered with black coke, which sticks to the tuyeres and causes the blocked gun; (2) The ash melting point of the pulverized coal is too low, and after the ash is melted, Part of it sticks to the tuyere coal gun, showing off-white slag. If coal gun blockage at the tuyeres cannot be detected and dealt with in time, the actual amount of coal injection at other tuyeres that are not block...

AI Technical Summary

Problems solved by technology

Its disadvantages are: due to the small peeping aperture of blast furnace tuyere, high ambient temperature and large interference, it is not conducive to the installation and use of active cameras, and the tuyere is a vulnerable part in ironmaking, and frequent maintenance, resulting in short service life of active cameras. limited use value

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