▎ 摘　　要

NOVELTY - Preparing three-dimensional (3D) printed denitration bag cage based on selective thermal sintering, comprises (i) mixing 50-70 pts. wt. denitration catalyst powder, 20-40 pts. wt. polytetrafluoroethylene powder, 2-5 pts. wt. graphene powder, and 3-10 pts. wt. nano silicon dioxide, ball milling, melting to obtain material A, adding 0.1-3 pts. wt. dioctyl phthalate into material A, mixing, extruding and granulating to obtain printing materials used by 3D printing device; (ii) creating 3D model of denitration bag cage and setting diameter and spacing of micropore; (iii) slicing created 3D model of denitration bag cage and setting layer height and wall thickness; (iv) spreading printing material on operating table by powder roller using selective thermal sintering method, preheating operation table, setting moving speed and power of print head, and 3D printing three-dimensional model of denitration bag cage; and (v) cooling and shaping at 100 degrees C and removing un-sintered excess powder. USE - The method is useful for preparing three-dimensional printed denitration bag cage based on selective thermal sintering. ADVANTAGE - The bag cage is full of micropores, which increases the contact area between the bag cage and the gas, and can form a good turbulence; has lower resistance and higher efficiency; and is convenient for industrialized scale production. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a denitration bag cage, comprising main body which is a straight tube provided with micro holes and the bottom of the straight tube is cage bottom. The cage bottom is provided with micro-holes, the diameter of the micro-holes is 2-10 mm, and the spacing of the micro-holes is 4-15 mm. The top end of the straight cylinder is provided with a flanging upper ring opening. DESCRIPTION OF DRAWING(S) - The drawing shows a three-dimensional model of the denitration bag cage.