WASTE WATER HEAT RECOVERY DEVICE HAVING PATH UNITS THAT ARE LAYERED AND ASSEMBLED SYMMETRICALLY TO EACH OTHER TO SMOOTH THE FLOW OF FLUID ALONG A COIL TRACK AND TO PREVENT SUDDEN PRESSURE DROP IN THE PATH

摘要

PURPOSE: A waste water heat recovery device having path units, which are layered and assembled, is provided to improve heat-exchange efficiency by flowing gently the clean water that moves upward from an inner path of the path unit and the waste water that moves downward from an outer path. CONSTITUTION: Plural path units(2) having a coil-shaped inner path(7) for flowing fluid into or out of opening units(9,9') arranged on the upper and lower sides are layered to connect the opening units to each other. A casing(1) is installed outside the layered path unit. A waste water heat recovery device(100) exchanges heat between the fluid that flows in the inner path and the fluid that flows an outer path(8) formed between the path unit and the casing. The waste water heat recovery device smoothes the flow of clean water(14) and waste water(13) by flowing curvedly the clean water and waste water along the inner and outer paths in a coil track.