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    • 4. 发明专利
    • RE-STARTING OPERATION METHOD OF PIPE LINE FOR HIGHLY CONCENTRATED COAL AND WATER SLURRY
    • JPS6287721A
    • 1987-04-22
    • JP22788585
    • 1985-10-15
    • NIPPON KOKAN KK
    • HAYASHI HIDEOOTOMO SHIGERUHOSAKA YASUMURAODA SHUNICHI
    • F23K3/00B65G53/30
    • PURPOSE:To be able to make the re-starting operation of a whole pipe-line easy by only installing a clean water press-in mechanism in such a way that a clean water press-in tube is connected via a pump to a pipe line transferring coal and water slurry under pressure from a cleanwater source and at the re-starting operation time of highly concentrated coal and water slurry the slurry is enabled to flow effectively and easily by said mechanism. CONSTITUTION:During the normal operation time of a pipe line, a valve 5 is opened and a valve 8 is closed and a small-sized press-in pump 7 is stopped and when the flow in a piping tube 3 does not start even by the control operation of a main pressure transfer pump 2 at the re-starting operation time of highly viscous fluid, a very little amount of clean water from a cleanwater tank 6 is injected under pressure into the pipe 3 by the pump 7. In this case it is desirable that the valve is closed and the main pressure transfer pump 2 is stopped. It is possible that highly concentrated coal and water slurry may be slightly moved and if not, press-in clean water forms a clean water film between the inner wall surface of a pipe 10 as the piping tube 3 and the highly concentrated coal and water slurry 11, and flows mainly downward to make the flow of a whole slurry easy.