The invention discloses an
open type absorption heat pump-MVR technology coupled closed cycle
drying system which comprises an
open type absorption heat pump system and a mechanical compression
heat pump cycle
system. An outlet of a mechanical
heat pump compressor is divided into two paths, one path is in pipeline connection with a hot
channel inlet of a heat removal device through a hot channel of a condenser, and the other path is in pipeline connection with the hot
channel inlet of the heat removal device through a 2# heat and
mass exchanger; and a hot channel outlet of the heat removal device is connected with an expansion valve through a pipeline, an outlet of the expansion valve is divided into two paths, one path is in pipeline connection with an inlet of the mechanical
heat pump compressor through a 1# heat and
mass exchanger, the other path is in pipeline connection with the inlet of the mechanical heat pump compressor through a cold channel of an
evaporator, and a mechanicalcompression type heat pump cycle system is formed. According to the
open type absorption heat pump-MVR technology coupled closed cycle
drying system, absorbed heat is used for regenerating a dilute solution through the mechanical compression type heat pump cycle system, regenerated steam is used for heating
dry gas after the grade of the regenerated steam is improved through an MVR technology; andby means of the open type absorption heat pump-MVR technology coupled closed cycle
drying system, a large amount of
latent heat in damp and hot gas exhausted by a dryer can be reasonably utilized.