| 摘要 |
PURPOSE:To prevent a spring from deteriorating, to unnecessitate replacing of the spring in a short period of time, to facilitate the maintenance of the heat exchanger and to eliminate a possibility of leakage of a fluid to be heated, by cooling the spring which applies an independent clamp pressure to a heat transfer tube by the low-temperature fluid to be heated. CONSTITUTION:An exhaust gas of a high temperature exhausted into the inner part of a frame body 1 is flowed, and air and other fluid to be heated of a low temperature are supplied into spaces 9, the fluid to be heated cools a spring 8 which is provided between one side wall surface component 4 of wall surface components 3 and 4 for clamping and holding a heat transfer tube 2, and a frame body 1, and applies an independent clamping force to each heat transfer tube 2. At the same time, the fluid to be heated is preheated by heat transmitted through the wall surface, and is introduced into a preheating chamber 10. The preheated fluid to be heated enters the heat transfer tube 2, and flows into a reversing chamber 13, flowing through the heat transfer tube 2 and being discharged to a heated fluid chamber 12. Meanwhile, each heat transfer tube 2 expands by the heat of the exhaust gas of a high temperature. However, since respective heat transfer tubes 2 are individually clamped and held by surface wall components 3 and 4 slidable in the axial direction, any leakage of the fluid to be heated is not produced. |
