Dust falling device for POY (pre-oriented yarn) integrated forming equipment

The utility model discloses a dust falling device for POY (pre-oriented yarn) integrated forming equipment, relates to the related field of dust falling, and aims to solve the problems that in the prior art, fiber flying velvet generated during pre-oriented yarn production is small in size and light in self weight, airflow disturbance is caused when water mist is sprayed outwards, and the dust falling effect is poor under the condition that the internal production space of a production workshop is large. The dust falling effect is achieved within a certain range outside the dust falling device, the number of flying fibers outside the range is increased due to airflow disturbance, and the dust falling requirement during processing and production of POY integrated forming equipment is not met. An intermediate treatment unit is mounted in the protective shell and comprises an outer rotating cylinder and an inner filtering cylinder, the outer rotating cylinder comprises an outer filter screen, the inner filtering