| 摘要 |
Provided is a heat exchanger with which a sufficient heat transfer area can be secured, and the interior of which can easily be cleaned and maintained. Also provided is an exhaust gas treatment device using this heat exchanger. This heat exchanger (10) is configured with: a main body casing (16) having a double-pipe structure comprising an outer pipe (12) and an inner pipe (14); and heat transfer plates (22) which partition the interior space formed between the outer pipe (12) and the inner pipe (14) into a heat-receiving fluid flow path (18) and a heat-radiating fluid flow path (20). In addition, the heat-receiving fluid flow path (18) and the heat-radiating fluid flow path (20) are formed so as to be adjacent to each other in the axial direction of the main body casing (16), and so as to have a helical shape across the entirety of the main body casing (16) in the axial direction. |
