Patent ID: 6257322
Filing Date: 2001-07-10
Classification: F28D,F28F,Y10S

Abstract:
An indirect heat exchanger filled with solid-gas reaction powdery particles comprising:an indirect heat exchanger which includes:a heat-exchange unit constituted by an upstream heat-exchange set having many flat tubes in many stages in the direction of height, said many flat tubes forming many small flow passages independently of one another and extending in the back-and-forth direction, and having fins extending in the back-and-forth direction maintaining a predetermined gap among said flat tubes neighboring up and down, and a downstream heat-exchange set, having the same structure as said upstream heat-exchange set, which is arranged close to the side of said upstream heat-exchange set in the direction of width;many tubular headers, extending in the direction of width, neighboring the ends on one side of said flat tubes to connect ends on one side of the pairs of the flat tubes at positions of equal heights of said two heat-exchange sets, and are arranged in the up-and-down direction at a predetermined distance;an upstream common header for commonly connecting the ends on the other side of said flat tubes of said upstream heat-exchange set; anda downstream common header for commonly connecting the ends on the other side of said flat tubes of said downstream heat-exchange set;a sealed casing containing at least said heat-exchange unit and tubular headers of said indirect heat exchanger;solid-gas reaction powdery particles filled in said sealed casing; andgas-transport tubes extending back-and-forth among said neighboring flat tubes penetrating through the end walls of said sealed casing in the back-and-forth direction to transport a gas that reacts with said solid-gas reaction powdery particles.