Apparatus for treating powdery and granular material

A powdery and granular material treating apparatus comprising:

• a rotary drum formed at least at one portion of the outer periphery thereof with ventilating perforations;
• seal means for gas fed to or exhausted from said rotary drum;
• sliding frames provided on the sides of the outer periphery of said rotary drum, said sliding frames being in sliding contact with said seal means;
• and
• partition means provided on the side of the outer periphery of said rotary drum at positions spaced apart equidistantly in the circumferential direction of said rotary drum from one another;
• said sliding frames each being of a circular outer shape, provided on the sides of the outer peripheral edges at axially opposite ends of said rotary drum;
• said seal means, being in sliding contact with said sliding frames at portions for feeding gas to or exhausting gas from said rotary drum, prevents gas from leaking through said portions;
• and
• said rotary drum, sliding frame, and partition means define a plurality of ventilating spaces, through which gas is fed to or exhausted from said drum when one of said ventilating spaces comes to said positions for feeding gas to or exhausting gas from said rotary drum by rotating said rotary drum, sliding frame, and partition means all together.