| 摘要 |
<p>A water purification plant comprises a treatment container (1), at atmospheric pressure and a first pump (7) for supplying raw water to the container. The pump is regulated by the water level in the container. Further the plant comprises a device (3) to mix the raw water with air in the upper part of the container, a filter (13), a collecting container (15) for filtered water, a pressure tank (17) and a filter washing device (22, 23, 30, 31). It also has a second pressure regulated pump (18) for transporting the filtered water from the collecting container (15) to the pressure tank (17). The filter washing device has a clearing device in the container above the filter (13). The clearing device consists of a siphon (30) and a spillway (31). A system for regulating has long intervals between short periods of back washing the filter.</p> |
