Mother liquor tank device with CBS recovery function

The utility model relates to a mother liquor tank device with a CBS recovery function. The mother liquor tank device comprises a mother liquor tank and a recovery tank mounted at the lower part of themother liquor tank, wherein the mother liquor tank and the recovery tank are stainless steel tanks, the bottom of the mother liquor tank is communicated with the upper end part of the recovery tank through a first pipeline, and a first valve body is arranged on the first pipeline; an air inlet pipe and a recovered amine inlet pipe are arranged at the upper part of the recovery tank, and a recovered amine outlet pipe is arranged at the lower part; a second valve body, a third valve body and a fourth valve body are respectively arranged on the air inlet pipe, the recovered amine inlet pipe andthe recovered amine outlet pipe; the end part of the air inlet pipe extends to the middle of the recovery tank; the end part of the recovered amine outlet pipe extends to the bottom of the recovery tank. The mother liquor tank