Direct reduction rotary kiln flue gas treatment device

The utility model discloses a flue gas treatment device for a direct reduction rotary kiln, which is characterized in that the feeding end of the rotary kiln is connected with a vertical flue gas treatment chamber, the feeding end of the rotary kiln is flexibly and hermetically connected with the side wall of the flue gas treatment chamber, and the cross section of the flue gas treatment chamber is more than three times of the cross section area of a kiln tail cover of the rotary kiln; a feeding pipe of the rotary kiln vertically and downwards penetrates into the rotary kiln from the top of the flue gas treatment chamber; the bottom of the flue gas treatment chamber is provided with an ash deposition discharge port, and the top is connected with a flue gas discharge header pipe; the lower part of the flue gas treatment chamber is a gravity settling chamber, the upper part of the flue gas treatment chamber is a combustible component treatment chamber, the gravity settling chamber is used for settling particula