초록 ▼

A waste heat recovery boiler for a turbine including two denitrating devices disposed in the boiler to reduce the NOx concentration in an exhaust gas below a pre-determined value even when a turbine load changes. The overall denitration efficiency distribution of the boiler with respect to the turbi

A waste heat recovery boiler for a turbine including two denitrating devices disposed in the boiler to reduce the NOx concentration in an exhaust gas below a pre-determined value even when a turbine load changes. The overall denitration efficiency distribution of the boiler with respect to the turbine load can be set arbitrarily by selecting suitable positions of the denitrating devices and the amounts of a catalyst, and any adverse effects resulting from the change of the turbine load can be avoided.

대표청구항 ▼

A waste heat recovery boiler of the type which utilizes an exhaust gas of a gas turbine and generates steam for driving a steam turbine, the improvement wherein at least two denitrating devices for removing NOx components in the exhaust gas therefrom are disposed inside said waste heat recovery boil

A waste heat recovery boiler of the type which utilizes an exhaust gas of a gas turbine and generates steam for driving a steam turbine, the improvement wherein at least two denitrating devices for removing NOx components in the exhaust gas therefrom are disposed inside said waste heat recovery boiler, said waste heat recovery boiler is equipped with fuel economizers for preheating feed water by said exhaust gas, rear and front evaporators for evaporting the pre-heated feed water, a superheater for for heating the vaporized feed water and generating the driving steam for said steam turbine, all of said constituent members being disposed sequentially from a downstream side to an upstream side of the exhaust gas, and wherein said denitrating devices are disposed between said at least two evaporators and between said front evaporator and said superheater.