1.Different Design Intentions for Frequencies
The coal mixer and the grate are like a blender and an induction cooktop in a kitchen. Although they serve the same dish, their working rhythms are completely different. The coal mixer typically operates at a higher frequency, around 50 to 100 Hz, to quickly mix coal powder with air. The grate, on the other hand, runs at a low frequency of 0.1 to 2 Hz, slowly advancing the fuel. This difference comes from three reasons
The coal mixer needs sufficient turbulence to achieve uniform mixing
The grate must maintain a stable fuel bed for steady combustion
Together they ensure continuous burning
2.The Delicate Balance of Synergistic Operation
This perfect pair achieves a dynamic balance through their frequency difference
High frequency advantage of the mixer microsecond level mixing prevents coal dust settling
Low frequency characteristic of the grate minute level movement ensures complete burnout
System coupling principle high frequency mixing plus low frequency transport equals a stable combustion wave
3.Practical Considerations for Frequency Matching
During field commissioning, the following hidden relationships must be noted
When coal quality changes, the frequency difference between the two must be adjusted simultaneously
When load fluctuates, adjust the coal mixer frequency first
A sudden change in grate frequency may cause combustion interruption
The optimal matching point must be derived from flue gas analysis
