| 摘要 |
PROBLEM TO BE SOLVED: To provide a gas/gas heater to which the effective heat transfer area of a reheater can be adjusted. SOLUTION: A gas/gas heater is constituted in such a way that a high- temperature unprocessed gas 36 from a boiler 35 is introduced to desulfurization equipment 41 for desulfurization after the heat of the gas 36 is collected by means of the heat exchanger 1a of heat recovery equipment 31 and further introduced to a reheater 32 from the equipment 41 as a clean low-temperature processed gas 42. The processed gas 42 is discharged into and scattered in the air after the gas 42 is reheated by means of a heating medium storing the collected heat in the reheater 32. The heat exchanger 1b incorporated in the reheater 32 is divided into a plurality of blocks and the branch pipes of the circulating pipe of the heating medium 37 are respectively piped in parallel with each other to the blocks and stop valves V1, V2,..., Vn are installed to the inlet sections of the blocks. The temperature of the processed gas is always measured by providing a processed-gas temperature detector 3 to the outlet section of the reheater 32. |
