The dryer cylinder is a hollow cylinder made of cast iron with covers at both ends. It is composed of a cylinder body and a cylinder head at both ends. The outer diameter is usually 1000-3000mm. During operation, steam is passed inside to dry the transported paper. Ironed. The main components of the dryer include: roller shell, spoiler rod, siphon tube, end cover, manhole cover, bearing, shaft head, steam joint, etc.

The saturated steam introduced from the steam joint condenses inside the drying cylinder, and the heat released causes the temperature of the dryer cylinder to rise, thus heating the paper sheet running on the surface of the roller shell. Heat is transferred into the paper during contact with the dryer surface. After the steam releases heat and is condensed, a large amount of condensed water is generated. When the angular velocity is high, a water ring is formed, which hinders the transfer of heat to the surface of the dryer. Therefore, a siphon is required to drain the condensed water in time.

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