PURPOSE: An acoustic resonance removing apparatus in a boiler tube bank is provided to effectively control an acoustic resonance in a duct by properly controlling an acoustic mode in order to correspond to an acoustic resonance.;CONSTITUTION: An acoustic resonance removing apparatus in a boiler tube bank comprises a neck part(30), a cavity part(40), and a variable means(50). A neck part is installed in the outer periphery of a heat exchanger equipped in the exhaust part of a boiler and has regular length and area installed to be connected to the inside of the duct. A cavity part is installed to be connected to the rear end of a neck part and forms a space for varying an acoustic mode inside. A variable means is installed to be able to vary the volume of the internal space of a cavity part. A neck part is formed in a cylinder having regular length and area to the vertical direction in the outer periphery of the duct. A variable means comprises a piston installed to be able to slide in the cavity part and a driving part(55) operating the piston as a cylinder. A variable means comprises a piston installed to be able to slide in the cavity and a driving part operating the piston as a gear method.;COPYRIGHT KIPO 2013
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