Chromic  is an expensive reagent, and the recycling of chromic  is very valuable.Chromic density is larger and easy to condense, chromium fog collection, under the action of induced fan, into the recovery device, device set multi-layer interception filter, through the filter interception effect, make the chromium fog condensation into liquid, liquid chromium along the filter into the lower recovery container, lower recycling container set recovery pipe, when the recovery liquid reaches a certain amount, discharge chromium liquid in the recovery device