Circulating water tank experimental device and method for realizing controllable solution saturation

The invention discloses a circulating water tank experimental device for realizing solution saturation controllability, which comprises a vacuum pump, a first transmission unit, a centrifugal pump and a second transmission unit which are connected in sequence, the second transmission unit is connected with the vacuum pump to form a closed circulating water tank, and a vent valve and dissolved oxygen measuring equipment are arranged on the second transmission unit; the vent valve is used for introducing to-be-dissolved gas into the closed circulating water tank, the dissolved oxygen measuring equipment is used for monitoring the actual dissolved amount in the closed circulating water tank in real time and judging whether the saturation degree at the current temperature is reached or not according to the actual dissolved amount, and the volume of the to-be-dissolved gas introduced into the closed circulating water tank is controlled by adjusting the vent valve; until the actual dissolved quantity measured by th