Treatment and recovery method and system for waste gas containing hydrogen fluoride

The invention belongs to the technical field of process waste gas treatment and recovery, and particularly relates to a hydrogen fluoride-containing waste gas treatment and recovery method and system, the system at least comprises: a quenching absorption tower, the feed port of which is communicated with a hydrogen fluoride waste gas pipeline, the tower top spray liquid inlet of which is communicated with an ammonia water absorption liquid pipeline, and the exhaust port of which is communicated with an unabsorbed gas discharge pipeline; a feed port of the liquid conveying equipment is communicated with a liquid phase discharge port of the quenching absorption tower, and a discharge circulation port of the liquid conveying equipment is communicated with a tower top spray liquid inlet of the quenching absorption tower through an absorption liquid circulation pipeline; a feeding hole of the evaporative crystallization equipment is communicated with a product discharging hole of the liquid conveying equipment, an