INVT VFDs Applied to Fans in the Cement Plant. There are many kinds of fans in the cement plant. For example, Raw- material mill ID fan/ Coal mill ID fan/ Cement mill ID fan/ Preheater high-temperature fan/ Kiln end fan / Kiln head fan/ the grate cooler/ separated fan and transport power fan. These fans consume a lot of energy.
Due to transport cooling water/ wastewater and mortar, there are some pumps in the cement factories. With today's VFD technology those pumps can be controlled with the best possible efficiency without compromising reliability. Furthermore, mechanical maintenance costs can be reduced by controlling the water flow with VFDs instead of throttling valves or hydraulic couplings.
Rotary kiln is a very important device in the cement plant. Variable speed drives are used to control the rotational speed of cement kilns. As the speed of material flow through the kiln is proportional to rotation speed, a VFD is required to control it. In addition to speed, VFDs provide controlled torque.
Conveyors are found in almost every cement plant. As shown in the picture, conveyor load is transporting raw-material / coal and cement. The environment is demanding and there is always a risk of damaging the belt by overstretching, slipping or breaking. So conveyors driven by VFDs can bring in below benefits.
The effect of mill is used mechanical power to change big size of the material to small size in order to meet with cement plant requirement. For the big capacity cement plant, the mill rated power is very huge, maybe more than 5000kw. How to smoothly start without impact current and voltage, and how to adjust mill speed, are obstructing cement plant. Control them with VFDs results in the following benefits.
With the development of VFD (Variable Frequency Drive) technology, more and more VFDs are used in the cement industry to meet different needs. INVT took more than 10 years to design and generalize VFDs for cement industry.
INVT worked with this company since 2010; there are more than 40 sets of INVT medium voltage VFD drives are being used in different applications. Exhaust fan Fans, ID fans, Boiler Pumps, VRM, ball mills etc.