Patent ID: 7357100

Claim:
A construction method for an exhaust heat recovery boiler having a heat exchanger tube bundle positioned within a casing which defines a gas duct in which exhaust gas flows generally horizontally to generate steam, the construction method comprising: providing a heat exchanger tube bundle comprising a plurality of modules; providing the plurality of modules such that each of the modules include an assembly, the assembly comprising: heat exchanger tube panels having a plurality of heat exchanger tubes and corresponding headers, an upper casing provided above the heat exchanger tube panels, and support beams configured to support the heat exchanger tube panels, the support beams being provided on an upper surface of the upper casing in a transportation frame that is formed of a rigid body and used only during transportation; preparing the plurality of modules according to design specifications of the exhaust heat recovery boiler; constructing in advance, at a construction site of the exhaust heat recovery boiler, structural members configured to support the modules, the structural members comprising: ceiling part support beams, side casings and a bottom casing of the exhaust heat recovery boiler; and at a construction site of the exhaust heat recovery boiler, surfaces of each module which will be arranged perpendicular to the gas flow are connected to upper and lower sides of the boiler and each module is erected together with the transportation frame, each module is removed from an inside of the transportation frame, and each module is suspended from above and between adjacent ceiling part support beams at a construction site of the exhaust heat recovery boiler, such that the heat exchanger tube panel support beams of each module are positioned at the set heights of the ceiling part support beams, wherein the support beams are connected and fixed to each other via connecting steel plates.