The utility model discloses an efficient flash tank which comprises a flash tank body, a stabilizing block is arranged in the flash tank body, a floating rod is connected to the stabilizing block in a sliding mode, a floating block is fixedly connected to the lower end face of the floating rod, an
extrusion block is fixedly connected to the outer wall of the floating rod, and a first
diagonal plane is arranged on the side, away from the floating rod, of the
extrusion block. A gas-liquid mixture can be treated through the flash tank body, liquid is accumulated at the bottom of the flash tank body, the floating block and the floating rod are driven to move upwards through rising of the liquid level, an
extrusion block on the outer wall of the floating rod extrudes a stress block, and the stress block extrudes a connecting rod; a connecting rod drives a contact rod at one end of a moving column to move towards a
pressure sensor, the moving column slides on two guide rods and extrudes a spring, the contact rod extrudes the
pressure sensor, signals are transmitted through the
pressure sensor, liquid at the bottom of the flash tank body is discharged, liquid accumulation is avoided, and the continuous stability of use of the flash tank is improved.