The utility model relates to a boiler technical field, concretely is a kind of
flue gas reheater, including steam cylinder, the outside of steam cylinder is provided with
flue gas cylinder, the bottom of steam cylinder is connected with steam outlet
pipe seat, the upper end of steam cylinder is connected with steam inlet
pipe seat, the inner wall of
flue gas cylinder is sequentially installed with several heat exchange pipes from top to bottom, one end of heat exchange
pipe is located in steam cylinder, the other end of heat exchange pipe is located in
flue gas cylinder, and outer wall is provided with several heat exchange fins. In the
flue gas reheater, heat exchange pipe adopts the penetrating
layout of "one end is embedded in steam cylinder, one end is placed in
flue gas cylinder", cooperate with the several heat exchange fins of outer wall addition, the heat exchange area between flue gas and steam is greatly increased. Under the same volume, heat exchange contact area is significantly improved, the heat exchange rate of low-temperature flue gas and high-temperature steam is significantly accelerated, flue gas can be rapidly heated to above 80 DEG C, effectively eliminate "white
smoke" phenomenon, shorten heat
exchange time, avoid energy waste.