CLASSIFICATION DEVICE, STANDING PULVERIZER USING THE CLASSIFICATION DEVICE, AND COAL BURNING BOILER APPARATUS

摘要

[PROBLEMS] To provide a classification device which can provide a fine powder product into which coarse particles have not been significantly included. [MEANS FOR SOLVING PROBLEMS] A classification device characterized by comprising a combination of an installation pitch P and a width L in a fixed fin (13) satisfying the following formula: P/L = 0.042 ×(&thgr;-50) + 0.64 to 0.019 ×(&thgr;-50) + 0.22 at 500 < &thgr; < 70° wherein &thgr; represents the inclination angle of the fixed fin (13); P represents the installation pitch of the fixed fin (13); and L represents the width of a particle flow direction.