Foundation pit yellow water treatment device

The invention relates to a foundation pit yellow water treatment device; a foundation pit yellow water gathering pipe is connected with the top of pretreatment equipment for yellow water to enter, the bottom of the pretreatment equipment is connected with a water inlet pump through an inlet pipe, the water inlet pump is connected to the top of a catalytic reaction tower through an outlet pipe, and the bottom of the catalytic reaction tower is connected with the top of a biochemical reaction tower through a water outlet pipe; the bottom of the biochemical reaction tower is connected with a clean water tank through a clear water pipe; the clean water tank is externally connected with a drain pipe; an air inlet main pipe is connected with an air outlet main pipe by a vortex air pump, the air outlet main pipe is respectively connected with the pretreatment equipment, the catalytic reaction tower and the biochemical reaction tower; the bottom of the clear water tank is also connected with a cleaning pump through a