Tail gas collecting device for propane dehydrogenation reaction

The utility model relates to a tail gas collecting device for propane dehydrogenation reaction, which comprises a reaction tank, a tail gas conveying pipeline meshed with the upper surface of the reaction tank, a tail gas treatment box connected with the tail end of the tail gas conveying pipeline, a valve movably arranged on the surface of the tail gas conveying pipeline, and a waste gas pipeline and a liquid pipeline fixedly arranged at the tail end of the tail gas conveying pipeline, the tail end of the waste gas pipeline is fixedly provided with an activated carbon box, the tail end of the liquid pipeline is fixedly provided with a water storage tank, the surface of the water storage tank is provided with a water inlet hole, the side wall of the water storage tank is provided with a movable sliding groove, a sliding plate is arranged in the movable sliding groove in a meshed mode, and the surface of the sliding plate is fixedly provided with a limiting block and a floating ball. And springs are fixedly ar