| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of detecting clogging of piping in a dust coal blowing installation of a blast furnace which is not affected by equipment arranged around the piping and can reduce the time from occurrence of clogging of dust coal in the piping to detection of the clogging, compared with conventional methods.SOLUTION: A method of detecting clogging of piping in a dust coal blowing installation of a blast furnace includes a step of calculating an absolute value of a differential pressure between a pressure measurement in an upstream air feeding system and a pressure measurement in a downstream air feeding system and a step of detecting clogging of piping by determining occurrence of dust coal clogging of the piping of the upstream air feeding system when the magnitude of the absolute value of the calculated differential value is equal to or greater than a pre-set upstream threshold value P1 and the pressure measurement in the downstream air feeding system is equal to or smaller than a pre-set first downstream threshold value B1 and determining occurrence of dust coal clogging of the piping of the downstream air feeding system when the magnitude of the absolute value of the calculated differential pressure is equal to or greater than a pre-set downstream threshold value and the pressure measurement value in the downstream air feeding system is greater than a pre-set second downstream pressure threshold value. |
