Method and device for scrubbing phosphoric acid extracting tail gas

The invention relates to the technical field of phosphoric acid extracting tail gas treatment, in particular to a method and a device for scrubbing phosphoric acid extracting tail gas. By replacing a conventional venturi scrubber with a scrubbing tube, adaptively adjusting the whole device and particularly researching the structure of the scrubbing tube, the gas can be scrubbed in the straight-through scrubbing tube according to the scrubbing principle in the venturi scrubber, so that the scrubbing efficiency is ensured, attached particles are difficultly formed on the inner wall of the scrubbing tube, and thus an agglomerating blockage phenomenon on the wall of the scrubbing tube is avoided; through reasonable design of positions of a spray head assembly and a sprinkling device in the scrubbing tube, the primary tail gas scrubbing efficiency is relatively good, a blockage phenomenon of spray heads in a scrubbing tower a, caused by excessive crystallization after the tail gas enters the scrubbing tower a, is