Improved ammonia gas recovery system

An improved ammonia gas recovery system comprises multiple-stage absorption devices sequentially communicated, wherein each-stage absorption device comprises a circulating water tank, a circulating pump and an absorption film set sequentially communicated, and further comprises a digital display liquidometer, a controller and a power-driven three-way valve; the digital display liquidometers are arranged on the circulating water tanks and connected with the controllers; the power-driven three-way valve is arranged between the circulating pump and the absorption film set and is connected with the controller of the lower-stage absorption device; the power-driven three-way valve is communicated with the circulating pump, the absorption film set and the circulating water tank of the lower-stage absorption device. The improved ammonia gas recovery system is reasonable in design and simple in structure; when the water level of the lower-stage circulating water tank is low, the lower-stage digital display liquidometer can detect the information and transmits the information to the lower-stage controller, the controller controls the upper-stage three-way valve to enable water flow to be switched over and flow to the lower-stage circulating water tank, so that the water level of the lower-stage circulating water tank is supplemented.