METHODS AND APPARATUS FOR TREATING WATER AND WASTEWATER EMPLOYING A CLOTH FILTER

摘要

A backwash header for a cloth filter includes a body having a length, a diameter, first and second ends, a longitudinal axis, and an exterior surface, the body defining at least one internal cavity. The body includes at least one suction slot sized to allow fluids and solids to enter the internal cavity from outside of the exterior surface. A structure is attached to a portion of the exterior surface of the body around and extending away from the suction slot to form an open-ended chamber defined by the structure and a portion of the exterior surface near the suction slot. The structure allows fluids and solids to enter the open-ended chamber and then the suction slot and cavity from a material being cleaned. Cloth filters and methods of treating water and wastewater using the backwash headers and cloth filters.

主权项

1. An apparatus comprising:
a body having a length, first and second ends, a longitudinal axis, and an exterior surface, the body defining at least one internal cavity; the body comprising at least one slot sized to allow fluids and solids to enter the internal cavity from outside of the exterior surface; and a structure attached to the exterior surface of the body proximate to and on opposite sides of the slot, the structure substantially parallel to and extending away from the slot to form an open-ended chamber, the open-ended chamber comprising first and second open-ended sub-chambers on opposites sides of the slot; wherein the open-ended sub-chambers have sufficient volume to allow gradual straightening and relaxing of fibers of a filter material being cleaned by the apparatus, and allow relatively clean fluid to pass through the filter material in a reverse direction upon application of a suction pressure in the internal cavity, and allow the relatively clean fluid and solids previously adhered to the fibers to enter the open-ended chamber, then the slot and internal cavity while substantially preventing other relatively less clean fluids and solids from entering the open-ended chamber, slot and internal cavity.