| 摘要 |
<p>: Sludge removal system in combination with a sludge settling tank to remove sludge which settled out at the bottom of the tank comprising a support bridge located above the tank and movable in a path over the tank; means removing the sludge from the bottom of the tank, as the bridge is moving while excluding access of air at ambient pressure to said sludge and forming an hydraulically closed suction fluid conduit to remove said sludge, including a suction nozzle and a suction riser pipe supported from the bridge and extending into the tank to sweep the bottom of the tank upon movement of the bridge in its path; a fixed sludge removal pipe located at least in part below the bottom of the tank, fixed with respect to the tank, immovably secured thereto and having a vertically extending fixed pipe portion; a connecting pipe means supported from and moving with the bridge including a horizontal portion located above the highest liquid level joined to the suction riser pipe and an end portion extending vertically downwardly, and aligned with the vertically extending portion of the fixed sludge removal pipe; and a movable joint which is substantially liquid-tight and tight with respect to subatmospheric pressure connecting the vertical end portion of the connecting pipe means and the sludge removal pipe; and a pump located laterally with respect to the tank and having a suction inlet connection connected to the sludge removal pipe, and hence to the hydraulically closed fluid conduit to provide a suction fluid circuit which is hydraulically closed from the nozzle below the liquid level through the pipe portion above the liquid level and then to the laterally located pump while permitting relative movement of the nozzle in its path over the sludge settling tank. And, a method for removing sludge from the bottom of a settling tank.</p> |
