Tail gas continuous double-suction treatment efficient recovery device and recovery process

The invention discloses a tail gas continuous double-suction treatment efficient recovery device and recovery process. The related device comprises a tail gas buffer tank, a first-stage cyclic absorption system and a second-stage cyclic absorption system. The first-stage cyclic absorption system comprises a first-stage heat exchanger, a first-stage absorption liquid storage tank and a first-stagedelivery pump; the first-stage heat exchanger is a falling film absorber and is divided into a first-stage feeding cavity section, a first-stage absorption cooling section and a first-stage gas-liquidseparation section. A liquid outlet in the bottom of the first-stage gas-liquid separation section is connected with an inlet of the first-stage conveying pump through a first-stage absorption liquidstorage tank by a pipeline, an outlet of the first-stage conveying pump is divided into two paths, one path is used for discharging a byproduct solution, and the other path is connected with the first-stage feeding cavity sect