Sponge copper extraction device and method based on acid etching liquid

The invention belongs to the technical field of etching liquid recycling, and particularly discloses a copper sponge extraction device based on acid etching liquid, which comprises an etching liquid storage tank, a filter, a reaction kettle, a filter press and a filtrate storage tank which are sequentially communicated through a pipeline, a filtrate delivery pump is arranged between the etching liquid storage tank and the filter, and the filtrate delivery pump is communicated with the etching liquid storage tank and the filter through pipelines; a funnel is arranged at the top end of the reaction kettle, and a discharge hole of the funnel is communicated with the reaction kettle; a sponge copper storage tank is further arranged at the discharging end of the filter press, and the sponge copper storage tank is communicated with the discharging end of the filter press. The device is simple in structure, small in equipment investment and easy to operate, the sponge copper powder with the copper content being 80%