| 摘要 |
<p>PURPOSE: To surely remove solid materials deposited on the bottom of a tank by injecting a small amount of liquid by forming the bottom of the tank in a groove-like shape on the cross section of the tank and providing an injection pipe toward a drainage ditch at the highest position in the groove-like shape constituting section. CONSTITUTION: The bottom 33 of a ring slab tank 31 is formed so that the bottom 33 can be inclined slightly toward a flow guiding pipe. An annular chamber 35 for collecting liquid has a drainage ditch 37 which is formed symmetrically with respect to the center line and the walls 38 and 41 of the ditch 37 are inclined more steeply than the bottom 33 of the tank 31. The inclined angleαof the walls 39 and 41 is set at 45 deg. and thatαof the bottom 33 is set at 3 deg.. An injection pipe 43 is provided at the highest part of the ditch 37. Since a liquid is injected from the pipe 43, solid materials deposited on the bottom 33 of the tank 31 are carried to a discharge port at a high speed by a remaining liquid or the injected liquid. Therefore, the solid materials deposited on the bottom 33 of the tank 31 can be removed surely.</p> |
