High-speed paper machine hot air primary exchange system

The utility model discloses a hot air primary exchange system of a high-speed paper machine. COMPRISING A LOWER COLLECTOR, the bottom of the lower collector is provided with an inclined plane type spraying water outlet; an exhaust inlet is formed in the side surface of the lower collector; an exhaust outlet is formed in the top of the lower collector; a tube type steam-gas heat exchange device isarranged above the exhaust outlet, an air supply inlet is formed in one side of the tube type steam-gas heat exchange device, an air supply outlet is formed in the other side of the tube type steam-gas heat exchange device, a spraying device for spraying the tube type steam-gas heat exchange device is arranged above the tube type steam-gas heat exchange device, an upper collector is arranged abovethe spraying device, and exhaust air is exhausted through the upper collector; a heat recovery supporting pipe is arranged between the lower collector and the tubular steam-gas heat exchange device and used for supporting the