High-temperature pipeline smoke waste heat recovery, discharge and filtering device

The utility model relates to a high-temperature pipeline smoke waste heat recovery, discharge and filtering device. The technical scheme includes that the device comprises a barrel, a noise reduction unit, a high-temperature smoke inlet pipe, a smoke outlet pipe, a cold air inlet pipe, a hot air outlet, a heat exchange unit and a dust filter, the noise reduction unit is fixed inside the barrel, the heat exchange unit is arranged between the noise reduction unit and the barrel, an inlet of the noise reduction unit is connected with the high-temperature smoke inlet pipe while an outlet of the same is connected with the smoke outlet pipe, the dust filter is arranged on the smoke outlet pipe, one end of the heat exchange unit is connected with the cold air inlet pipe while the other end of the same is connected with the hot air outlet, the heat exchange unit is of a U-shaped structure, and a spiral heat absorbing piece is arranged inside the heat exchange unit. The device has the advantages that the device is simple in structure and good in waste heat absorbing effect, and waste heat absorbing efficiency is improved.