FREQUENCY CHANGE CONTROL METHOD AND SYSTEM FOR MAIN EXHAUST FAN OF SINTERING SYSTEM

摘要

A frequency change control method for a main exhaust fan of a sintering system comprises: (1) obtaining sintered material quantity; (2) calculating the vertical sintering speed of a material layer by using the sintered material quantity and a preset burn-through point, and calculating effective large flue air quantity by using a relationship between the vertical sintering speed and effective air quantity; (3) detecting smoke components of a large flue; (4) calculating an effective air rate by using the smoke components of the large flue, and calculating target large flue air quantity; (5) by using the corresponding relationship between the large flue air quantity and the main exhaust fan rotation speed, searching for target main exhaust fan rotation speed corresponding to the target large flue air quantity; and (6) regulating the current main exhaust fan frequency to the target main exhaust fan frequency corresponding to the target main exhaust fan rotation speed. A frequency change control system for the main exhaust fan of the sintering system can reduce the consumption and loss of electricity of the sintering system as the result of the mismatching between the power provided in the operation of the main exhaust fan and the system load.