METHOD FOR MANUFACTURING A HEAT RECOVERY DEVICE

Provided is a denitration device installation method for installing a denitration device, which includes a plurality of catalyst members (30) for decomposing nitrogen oxides, in a heat recovery device (10) which recovers heat from gas containing nitrogen oxides, wherein the heat recovery device (10) includes: a heat recovery part (1, 2, 3) for recovering heat from the gas; and a first opening/closing part (8) which can be opened and closed to carry the catalyst members (30) from the outside of the heat recovery device (10) to the inside of the heat recovery device (10) where the heat recovery part (1, 2, 3) is installed. The installation method includes the steps of: carrying a plurality of support members for supporting the catalyst members through the first opening/closing part to the inside (S1303); installing the plurality of support members at positions where the heat recovery parts are not installed inside the heat recovery device (S1304); carrying the plurality of catalyst members through the first opening/closing part to the inside (S1305); and installing the plurality of catalyst members on the support members (S1306).