Industrial flue gas waste heat recovery environment-friendly treatment device

The invention discloses an industrial flue gas waste heat recovery environment-friendly treatment device, and belongs to the field of industrial waste gas treatment.The industrial flue gas waste heat recovery environment-friendly treatment device comprises an outer box, a gas inlet pipe is installed on one side of the bottom of the outer box, an exhaust pipe is installed on the top of the outer box, and an inner side lower box body and an inner side upper pipe body are arranged in the outer box; the inner side lower box body is located on the lower side of the interior of the outer box, the inner side upper pipe body is located on the upper side of the interior of the outer box, the bottom of the inner side upper pipe body extends to the inner side of the inner side lower box body, and a first gap is formed between the top of the inner side upper pipe body and the top of the inner side lower box body; a second gap exists between the bottom of the inner side upper pipe body and the bottom of the inner side low