| 摘要 |
A multi-stage fluid filter filters entrained particulate matter from a moving fluid stream. As shown, filter chamber (100) serves as a first filter stage for accumulating particulate matter on the filter mesh (130) and filter chamber (102) serves as a second filter stage having a previously accumulated layer of particulate matter on the filter mesh (132) thereof. The various conduits of the filter, including inlet and outlet conduits of the filter and conduits leading to and from the upstream and downstream ends of the filter chambers meet at nodes (108, 110). Fluid flow within the filter is entirely controlled by respective butterfly valves (104, 106) located within the nodes (108, 110). The butterfly valves are independently movable and enable four flow conditions within the filter: from the inlet to either filter chamber, acting as a first filter stage, then to the other filter chamber, acting as a second filter stage, then to the outlet; and from the inlet, through either filter chamber, then to the outlet, without flow to the other filter chamber, so enabling cleaning of that other filter chamber. |
