Tail gas continuous double-suction treatment efficient recovery device

The invention discloses a tail gas continuous double-suction treatment efficient recovery device which comprises a tail gas buffer tank, a first-stage circulating absorption system and a second-stagecirculating absorption system, and the first-stage circulating absorption system comprises a first-stage heat exchanger, a first-stage absorption liquid storage tank and a first-stage conveying 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-liquid separation section. A liquid outlet in the bottom of the first-stage gas-liquid separation section is connected with an inlet of a first-stage conveying pump through a first-stage absorption liquid storage tank through a pipeline, an outlet of the first-stage conveying pump is divided into two paths, one path is used for discharging a by-product solution, and the other path is connected with a first-stage feeding cavity section through