Patent ID: 6752710
Filing Date: 2004-06-22
Classification: B01D,B08B,B23K,F27B,F27D,G01F

Abstract:
An exhaust system for a controlled atmosphere treatment apparatus having at least one internal zone with predetermined atmospheric conditions therein and an exhaust stack for a predetermined exhaust flow from said zone, the system comprising:a metering device attached in fluid communication with the exhaust stack, the metering device having a converging entrance portion defining an inlet, a reduced diameter outlet portion defining an outlet, and a predetermined relationship between the inlet and outlet flow for measuring at the metering device the flow therethrough; suction means attached to communicate with the metering device outlet for drawing exhaust flow through the metering device; and suction control means responsive to the measured flow through the metering device and operably associated with the suction means for maintaining the outlet flow in the metering device such that the inlet flow thereto is generally equal to the predetermined exhaust flow from said internal zone.