The invention discloses liquid
ethylenediamine recovery pretreatment equipment which comprises a mixed reaction box and
recovery treatment equipment; a funnel cover is mounted at the bottom of the mixed reaction box and connected with the
recovery treatment equipment through a conveying
pipe, a recovery
pipe is mounted on the recovery treatment equipment, and an
electromagnetic valve is mounted on the recovery
pipe; a fixed block is fixedly connected to the upper end of the mixed reaction box in a penetrating mode, a negative pressure fan is mounted at the upper end of the mixed reaction box, a first feeding pipe is mounted at the air inlet end of the negative pressure fan, and an air outlet pipe is mounted at the air outlet end of the negative pressure fan; the
tail end of an adjustable spray head is closed, spray holes are circumferentially formed in the outer ring of the closed end of the
tail end in a surrounding mode, the spraying speed is increased, and meanwhile, the problem that a traditional
nozzle is prone to dust accumulation is solved. The liquid
ethylenediamine recovery pretreatment equipment is reasonable in structure, can realize full reaction of
liquid ammonia steam and MEA steam, and further can provide basic guarantee for recovery of liquid
ethylenediamine.