FIELD: heat power engineering; heat exchangers; heat recovery.
SUBSTANCE: invention can be used for recycling flue gases of boiler units. The flue gas heat recovery unit includes a housing, a conical coil, inlet and outlet pipes, inlet and outlet pipes, two sections of cassette heat exchangers, the first section being made of two stages and the heat exchanger cassettes in them are located horizontally and connected in parallel to each other, and have inlet and outlet pipes. The second section of heat exchanger cassettes is located at an angle of 30 degrees and also has inlet and outlet pipes. Additionally, the unit has a damper on an axis, which is connected to an eccentric located on the same hollow shaft with a conical coil, which in turn is connected directly to the outlet pipe, and to the inlet pipe through a flexible liner.
EFFECT: increased efficiency of the flue gas heat utilizer due to a deeper use of the heat potential of the flue gases and better separation of condensate during periodic excitation of the air.
1 cl, 1 dwg
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