Heat exchange recuperator

Claim 1

In a heat exchange recuperator including a box-like housing having an inlet and outlet for heating gases formed in the side walls of said housing, respectively, said inlet and outlet being opposed to each other, said box-like housing also having an inlet and an outlet for gases to be heated formed in lower and upper walls thereof, respectively, a pair of connecting plates mounted on said lower and upper walls of said box-like housing, respectively, said connecting plates having a plurality of holes formed therein, and a plurality of heat exchange hollow plates disposed in spaced relation sandwiched by said connecting plates, both ends of said hollow plates being inserted into the holes of said connecting plates, wherein the heating gases are adapted to pass through the spaces between said hollow plates and the gases to be heated are adapted to pass through inside of said hollow plates; the improvement comprising a plurality of generally U-shaped heat-resisting cover plates detachably mounted on the upstream ends, with respect to the heating gases, of each of said hollow plates, respectively, wherein spaces are formed between the upstream ends of said hollow plates and inner walls of said cover plates, and a plurality of buffer bar means detachably mounted to said box-like housing upstream, in parallel and opposed to said cover plates, said buffer bar means being adapted to contact with said U-shaped cover plates so as to prevent said cover plates from slipping off from said hollow plates and to insulate said U-shaped cover plates.