Drying cylinder steam condensation water pump-free back pressure recovery device

The utility model relates to a non-pump backpressure device for recovering the steam and the condensed water of a drying cylinder, which is mainly used for recovering the condensed water generated by heating the steam in a drying cylinder of a drying machine for fabrics in the printing and dyeing continuous product line. The device comprises a plurality of drying cylinders (1), branch condensed-water tubes (2), water-dredging valves (3), a water-steam separator (4), a general condensed-water tube (5), a bypass condensed-water tube (6) and a heat-preserving water tank (7); steam condensed water in the drying cylinders (1) is communicated with an inlet of a water-steam separator (4) through the respective branch condensed-water tubes (2), an outlet of the water-steam separator (4) is communicated with the general condensed-water tube (5), the general condensed-water tube (5) is communicated with a heat-preserving water tank (7), the bypass condensed-water tube (6) is sidewards arranged on the general condensed-