| 摘要 |
A pollution trap for storm-water runoff includes a filter-box assembly that provides for top-down maintenance. The filter-box assembly includes at least one filter container, a filter-container support, and a peripheral seal, so the filter container can be lifted from and lowered into the trap from above. The filter container includes sidewalls forming an open bottom and top, a bottom filter support, and a top filter retainer, with the container receiving a stack of intelligently-selected filters supported on the filter support and kept in the container by the top filter retainer. An optional adjustable hold-down assembly holds down the top filter retainer and the underlying filters. The filter-container support holds the filter container up off the trap floor so the storm-water can up-flow through it. And the seal is interposed peripherally between the filter container and the filter-container support so the storm-water cannot flow around the filter container. |
| 主权项 |
1. A trap using filters to separate pollution from water, the trap comprising:
a chamber including a floor, front and rear walls, two opposing side walls, a front inlet, and a rear outlet, wherein the water flows through the chamber from the front inlet to the rear outlet; a curtain wall that is positioned in the chamber, cooperates with the side walls to at least partially define a sub-chamber, and has a bottom that cooperates with the floor and the side walls to define a bottom-flow gap; a container adapted to hold one or more of the filters, having a peripheral wall defining an open bottom and an open top, and removably positioned in the sub-chamber in a use position with the container open bottom a pre-determined distance above the chamber floor to allow space for the pollution to settle, wherein the open bottom and the open top of the filter container permit upflow therethrough when the filter container is in the use position to enable the water to flow from the bottom-flow gap, into the rear sub-chamber, up through the container and up across the filters, then out of the sub-chamber; a support for the filter container, wherein the container support is mounted to the chamber to support the filter container in the use position; and a seal interposed between the filter container and the container support, wherein the seal is adapted to prevent the water from flowing around the filter container and bypassing the filters, wherein the water flowing through the trap is forced upward through the filter container so that it flows across the filters, decelerates, and has an increased residence time in the chamber, collectively providing for an increased separation efficiency of the trap. |
