With 100 years of experience, our services include mill inspections and performance evaluations including off-site grinding roller rebuild and refurbishment.
As part of our quality-focused commitment to continuously improve pulverizer operability and maintainability, several major design upgrades have been made available for both the MB and MBF pulverizers. These customized upgrades have assisted many of our customers in dramatically reducing maintenance budgets while improving profi tability throughout the equipment’s long service life.
Vertical Spindle Roller Mill
Dynamic Pressurized Rotating Classifier
The rotating classifi er offers coal fl ow and fi neness control using variable speed drive. This new design will greatly improve (10% to 30% output) and increase the effi ciency with added fl exibility to process varying types of fuel in existing mills.
Rotating Airport Design
Our latest improvement in MBF air-coal fl ow geometry reduces wear on the airport surfaces. The rotation of
the port reduces wear in two ways:
• Coal passes over the port opening and is swept upwards before it can be trapped in the interface between the rotating and stationary pieces. Older designed stationary airports require coal to travel over the interface where it can become trapped and cause wear.
• The rotation of the ports reduces housing wear by spreading the wear more evenly over the entire periphery of the pulverizer. The 3-sided airport design results in a self-cleaning action of the gap area.
These new airports are two-piece rotating airports. The lower airport segment will be made of cast iron while the higher wear upper airport will be made of cast chrome-moly abrasion resistant white iron. The upper airport will be designed for the fuel and is a simple bolt on design and can be changed quickly as fuels change. This design extends the total wear life and as a result, reduces the required maintenance hours and extends the parts replacement cycle.
