Hot air circulation type drying equipment for air penetration type paper machine

The invention discloses hot air circulation type drying equipment for an air penetration type paper machine, and belongs to the technical field of paper machines. The drying device is characterized by comprising a drying rotary drum, and a drying gas hood is arranged outside the drying rotary drum in a wrapping mode; the dry end gas hood and the wet end gas hood are respectively provided with a total air inlet, and the total air inlets are connected with a hot air source; lining plates are arranged in the dry-end gas hood and the wet-end gas hood, all the lining plates are clamped to form an air guide groove, circular air supply holes are formed in the working faces, facing the drying rotary drum, of the dry-end gas hood and the wet-end gas hood, one end of the air guide groove communicates with the main air inlet, and the other end of the air guide groove communicates with the multiple circular air supply holes; drying ventilation holes are formed in the drying rotary drum; and a negative pressure suction de