Air interchanger for SCR denitration catalyst primary drying

The utility model discloses an air interchanger for SCR denitration catalyst primary drying. The air interchanger comprises exhaust ventilation openings, air intake cones and blades; the exhaust ventilation openings are formed in the four corners of the top of a drying chamber, the four or more air intake cones distributed at equal intervals are installed on the middle symmetric line of the drying chamber, the four corresponding blades distributed at equal intervals are formed in the same circumferential direction of each air intake cone, and the upper half portion and the lower half portion of each air intake cone in the generatrix direction are respectively provided with four or more blades. When the air interchanger is used, in different periods of the SCR denitration catalyst primary drying procedure, horizontal flow and squish flow are formed by adjusting the different opening states of the blades of the air intake cones in cooperation with multi-hole exhaust, airflow flows smoothly, temperature of the d