Patent ID: 8974272
Filing Date: 2015-03-10
Classification: F24F

Abstract:
1. An aspirating induction nozzle assembly for vertical connection to a pressurized exhaust gas outlet, comprising: a tubular or frusto-conical central nozzle defined by a nozzle wall, and a frusto-conical wind band, which is attached in converging annular spaced relation to the exterior of the central nozzle by multiple mounting brackets; wherein the central nozzle comprises a proximal nozzle inlet opening, a distal nozzle discharge opening, multiple ambient air induction ports, a primary effluent passage, through which primary effluent from the exhaust gas outlet flows through the interior of the central nozzle, and a mixing zone within the interior of the central nozzle; wherein each of the induction ports has an induction inlet and an induction outlet, and wherein the induction inlets extend obliquely upward and inward from the exterior of the central nozzle and penetrate through the nozzle wall into the mixing zone, where they terminate in the induction outlets; wherein the induction outlets extend radially toward the axial center of the primary effluent passage, so as to constrict the primary effluent passage into multiple radial arms which radially alternate with the induction outlets to define a grid pattern in the mixing zone; wherein the constriction of the primary effluent passage in the mixing zone causes the exhaust gas to flow at a velocity at or above 3000 feet per minute over and around the induction outlets, creating negative pressure voids at the induction outlets and thereby inducing ambient air through the induction inlets into the mixing zone, where the grid pattern provides an extended boundary for intermixing of the primary effluent with the induced ambient air to produce a diluted combined nozzle discharge flow that has a greater volume than the primary effluent and that is discharged at the nozzle discharge opening; and wherein the wind band comprises a proximal wind band inlet opening and a distal wind band discharge opening and convergingly extends annularly around the central nozzle from at or below the induction inlets to at or above the nozzle discharge opening, such that a secondary induction process takes place at the nozzle discharge opening, whereby the nozzle discharge flow induces an annular secondary column of ambient air through the wind band, so as to produce a wind band discharge flow comprising the nozzle discharge flow surrounded by the annular secondary column of ambient air induced through the wind band.