| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce an installation cost by enabling to minimize the increase of a pressure loss in a reheater of a gas gas-heater by a simple structure without installing a steam gas heater, a soot blower or the like by constituting a heat transfer pipe arranged to an inlet part of the reheater by a bare pipe without a fin. SOLUTION: An exhaust gas of a saturated state exhausted from a wet flue gas desulfurizing apparatus is allowed to flow in a slightly wet state into a reheater 4 of a gas-heater 2, heated by a bare pipe 13 being a heat transfer pipe 10 arranged at an inlet part to make a dry state, the exhaust gas is allowed to pass through an area wherein a pipe with a fin 9 of the reheater 4 is arranged, and dust or the like is prevented from sticking and depositing between fins of the pipe with the fin 9. Though dust or the like is slightly stuck onto a surface of a bare pipe 13 since an exhaust gas is allowed to pass in a state before drying, there is no deposite of that which having been grown large because of no fin. Thereby, the increase of a pressure loss in the reheater 4 of the gas gas-heater can be minimized by a simple structure without installing a steam gas heater, a soot blower, or the like, and an installing cost can be reduced.</p> |
