Patent ID: 9389001
Filing Date: 2016-07-12
CPC Classification: F22B,F23J,F23L,F23M,F24H,Y02E

Claim Text:
1. A boiler comprising: a flue gas duct with a width W and a depth L; heat exchanger pipes in the flue gas duct, for heating or preheating liquid, steam or air; a first planar silencer plate substantially parallel to the flow direction of the flue gases, the first silencer plate comprising noise absorbing material, said first silencer plate being placed downstream of any of said heat exchanger pipes in the flow direction of the flue gases in said flue gas duct, and the distance d between said first silencer plate and said heat exchanger pipe being smaller than the width W of the flue gas duct or smaller than the depth L of the flue gas duct; at least one noise absorbing wall, the wall comprising said first silencer plate, and the wall truncating the resonating area transverse to the flow direction of the flue gases in the flue gas duct; a subfloor level for maintaining the silencer plate or the flue gas duct; and a subfloor space left between the subfloor level and the silencer plate, wherein the silencer plate suppresses noise caused by turbulence of the flow of the flue gases.