| 摘要 |
PROBLEM TO BE SOLVED: To provide a multi-tube heat exchanger that prevents stress from being generated in a tube sheet due to a thermal expansion difference between the tube sheets, while preventing upper and lower two tube sheets from being affected by each other.SOLUTION: The multi-tube heat exchanger includes an exhaust gas introduction chamber, an outer cylinder 2', a high-temperature-side tube sheet 4, a low-temperature-side tube sheet, a heat transfer tube 6, preheated air inlet, a preheated air outlet 11, a sub chamber 13, and tube sheets 4. The multi-tube heat exchanger includes a conical ring 18 fixed to an upper part of the outer cylinder 2' and holding the periphery of the upper tube sheet 4 (the high-temperature-side tube sheet 4) of the sub chamber 13, and a conical ring 19 fixed to the upper part of the outer cylinder and holding the periphery of the lower tube sheet 4' of the sub chamber 13. |
