Bone black retention adsorption device for removing heavy metals in sewage

The utility model discloses a bone black indwelling adsorption device for removing heavy metals in sewage, which comprises a tank body, a tank cover is arranged at the top of the tank body, an observation window is mounted on the side wall of the tank body, a water inlet pipe is connected to the side wall of the top of the tank body, a water outlet pipe is connected to the side wall of the bottom of the tank body, and a screw rod is mounted in the center of the inside of the tank body. And an adsorption seat is arranged on the outer side of the screw rod in the tank body in a sleeving manner. The adsorption seat, the adsorption cover and the pore plate are arranged, so that bone black particles can be uniformly distributed in the tank body, the bone black particles are prevented from being accumulated at the bottom of the tank body under the action of gravity, the bone black particles are promoted to fully contact and react with sewage in the tank body, and the working efficiency of removing heavy metals from