Patent ID: 6405791
Filing Date: 2002-06-18
Classification: F23L,Y02E

Abstract:
A tubular air heater for transferring heat from hot flue gas into air, comprising:a plurality of heat exchanger tubes for conveying the hot flue gas therethrough and the air there across in heat exchange relationship; and inlet plenum means, located at an upper end of the tubular air heater, for receiving the hot flue gas, the inlet plenum means being subdivided by divider plate means therein into a first flue gas passage for providing hot flue gas to flue gas environmental treatment equipment and a second flue gas passage for receiving hot flue gas from the flue gas environmental treatment equipment, the first flue gas passage for conveying the hot flue gas through the inlet plenum means while preventing the hot flue gas from entering the plurality of heat exchanger tubes, the second flue gas passage for conveying the hot flue gas into the plurality of heat exchanger tubes; and wherein the first flue gas passage is located next to the second flue gas passage, the divider plate means extending within the inlet plenum means substantially across a width and depth of the tubular air heater between the two flue gas passages.