| 摘要 |
PROBLEM TO BE SOLVED: To contrive to structure a duct-burner system without enlarging the size of an exhaust heat recovery boiler and degrading economical efficiency thereof. SOLUTION: The exhaust heat recovery boiler comprises separating pipes of an evaporator 7 into an evaporator 7a and an evaporator 7b, and disposing superheaters 9, 12 and a part of reheaters 10, 11 or all of the superheaters 9, 12 and reheaters 10, 11 between the separated evaporators 7a, 7b. Using only an one-stage burner as a duct burner 13 requires no two-stage duct burner and no combustion chamber therefor unlike conventional technology, decreasing the size of the exhaust heat recovery boiler, and simplifying combustion control of the duct burner 13. As a result, economical efficiency of the overall exhaust heat recovery boiler provided with the duct burner is improved.
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