| 摘要 |
The oil is separated from the rainwater that runs off a parking lot or off t he pavement of a filling station. An inlet tank (12) receives the runoff water. When the water is entering that tank at a very low rate, t he surface water and/or oil in the inlet tank drains to a main separation tank (21) where the oil floats on clean water. That clean water i s fed to an outlet conduit (l8) that feeds unpolluted water to the city sewer or to a river. When the inlet flow increases to an intermediate rate, a pipe of inverted L-shape (14) feeds clean water from the inlet tank (12) to the outlet conduit (18). When the inlet fluid has a very large flow rate, as might occur during a heavy downpour of rain, the fluid level in the inlet tank (12) rises to a level at which there is a direct overflow into the outlet conduit (18).
|
