Visual experimental device for gas collection process by air exhaust method

The utility model relates to an experimental device for visualizing a gas collection process by an air exhaust method. The experimental device comprises a gas making device, a gas collection device and a tail gas treatment device which are communicated in sequence, the experimental device further comprises a harmful gas treatment device, the harmful gas treatment device comprises a dual-purpose gas cylinder and a liquid dropping bottle, the dual-purpose gas cylinder and the liquid dropping bottle are used for treating harmful gas in the gas making device and the gas collecting device respectively, and a contrast experiment that nitrogen dioxide is collected through an upward air exhausting method and a downward air exhausting method at the same time can be carried out. The interaction between the colored gas entering the two gas collecting bottles and the air in the original bottle is directly observed. 本实用新型涉及一种排空气法收集气体过程可视化的实验装置，包括依次连通的制气装置、集气装置和尾气处理装置；所述实验装置还包括有害气体处理装置，所述有害气体处理装置包括两用气筒和滴液瓶，所述两用气筒和滴液瓶分别用于处理