Tail gas recovery system and recovery method for methyl ethyl ketone device

The invention relates to the technical field of tail gas treatment, and discloses a tail gas recovery system and method for a methyl ethyl ketone device. The system comprises a base, a refrigerator, a gas outlet pipe and a blow-off pipe; a compressor unit, an absorption separator and a coalescer are arranged on the base, an inlet of the refrigerator is communicated with an outlet of the compressor unit, an outlet of the refrigerator is communicated with the interior of the absorption separator, the upper end of the absorption separator is further communicated with an inlet of the coalescer, and the upper end of the coalescer is further communicated with an outlet of the condenser. An air outlet pipe and a blow-off pipe which are communicated with the interior of the coalescer are respectively mounted at the upper and lower ends of the coalescer. According to the tail gas recovery system and method for the methyl ethyl ketone device, hydrogen in methyl ethyl ketone tail gas can be recovered, the process is sim