PURPOSE: To make it possible to collect and taken out smoothly the heat transfer pipe washing material which flows into an exhaust pipe line together with exhaust cooling water by a method wherein a guide plate for guiding the washing material is provided at the connecting section of a V-shaped main grid and a reverse V-shaped auxiliary grid of a washing material collecting grid.
CONSTITUTION: The washing material guide plate 7 which is in the form of a band and which has a flat and smooth surface is provided at the connecting section of the convex V-shaped main grid 1 and the concave reverse V-shaped auxiliary grid intersecting the former at right angles, so as to cover the connecting section whereby the ball-like washing material 6 entering the exhaust pipe line is transferred into a washing material extracting pipe 4 without standing and is taken out from the pipe 4. Further, the guide plate 7 is provided with a nunber of water injecting ports 7 adopted to inject water from the surface of the plate 7 in the direction reverse to the flow direction of the exhaust cooling water so as to remove foreign substances adhered thereto. By the way, the reverse washing of the washing material collecting grid 3 is performed by changing the direction of the grid members of the grid 3 by a rotary mechanism 8.
KANEKO TOSHIHIKO
YANAGIHARA MAKOTO
HITACHI KIKAI ENG
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