| 摘要 |
PCT No. PCT/GB82/00078 Sec. 371 Date Nov. 5, 1982 Sec. 102(e) Date Nov. 5, 1982 PCT Filed Mar. 9, 1982 PCT Pub. No. WO82/03066 PCT Pub. Date Sep. 16, 1982.A method of unblocking conveying pipes (3) for particulate material comprises feeding air to the pipe at spaced apart positions therealong in order to reduce the length of the blocking material. The air is injected into the pipe at positions which are preferably spaced apart by a distance less than the critical particulate material plug length to conveying pipe diameter ratio that will result in a pipe blockage that cannot be moved by application of pressure applied to one end of the particulate material plug. Apparatus for carrying out the method is also described.
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