Releasing method of clogging of pipe caused by powders and particles

Abstract

Abstract PURPOSE:To eliminate clogging of a pipe caused by the transported powders and paticles by a method wherein when the clogging of a pipe caused by powders and particles in the midway of an air transport pipe, compressed air is fed into the upstream side pipe in respect to the clogged portion and then the air is discharged at once under reduced pressure condition. CONSTITUTION:The ash in the primary ash storing container 11 is fed by the desired quantity to a specified quantity of ash feeding device 12 under opening and closing action of an ash filling valve 11a. Then, a shut-off valve 14 and a transport air feeding valve 13a are opened, the ash in the specified quantity of ash feeding device 12 is compressed with the compressed air fed from the transport air feeding device 13, and the ash is fed to the secondary ash storing unit 15 through the shut-off valve 14 and an ash transport pipe 5 so as to perform an ash transport cycle. In this case, when the clogging is found in the pipe, as shown by a symbol 16, at first the transport air feeding valve 13a is closed, an air feeding valve 22 is opened, compressed air is fed in the ash transport pipe 5 on the upstream side of the clogged pipe part 16 and the filling of the air is sensed by a pressure gauge 25. Then, the air feeding valve 22 is c losed and an air releasing valve 23 is opened quickly, so as to reduce the pressure in the ash transport pipe at once. Repetition of these operations makes the rugged pipe clogging 16 destructed and then a normal operation can be started again.

Inventors

• 👤 Katsumi Ishida
• 👤 石田　勝美
• 👤 Masaaki Kawada
• 👤 川田　政明

Bibliographic Details