Patent ID: 8752614
Filing Date: 2014-06-17
Classification: E03F,F28D,Y02A,Y02B

Abstract:
1. A heat exchanger element for installation in a sewage pipeline, the sewage pipeline having a longitudinal axis and a concave inner circumferential surface extending along the longitudinal axis, the heat exchanger element comprising: opposite upstream and downstream ends; parallel left and right side edges extending between the upstream and downstream ends; opposite upper and lower surfaces between the upstream and downstream ends and between the left and right side edges; heat exchanger chambers between the upper and lower surfaces; a run-in gutter extending from the upstream end to the downstream end and spaced inward from the left and right side edges, the upper surface of the run-in gutter being concave from the upstream end to the downstream end and the lower surface of the run-in gutter being convex from the upstream end to the downstream end; left and right run-off surfaces formed on the upper surface of the heat exchanger element between the left and right side edges and the run-in gutter; the heat exchanger element being configured relative to the sewage pipeline so that the left and right side edges are simultaneously engageable with spaced apart locations on the inner circumferential surface of the sewage pipeline while the lower surface of the run-in gutter defines a floor point engaging the inner circumferential surface of the sewage pipeline from the upstream end to the downstream end of the heat exchanger element; and areas of the lower surface between the floor point and the left and right side edges being spaced from the inner circumferential surface of the sewage pipeline for accommodating heat exchange lines.