APPLICATION REFERENCE - Bonfiglioli

Sugar cane and Biomass
for internal use only
APPLICATION REFERENCE
GENERAL NEEDS OF THE APPLICATION
In distillery plant close to Córdoba city, there are 2 big sugar cane mills, each with 4 cane rolls.
Each sugar cane mill is driven by a Bonfiglioli gearbox connected by a torque limiter to an electric
motor of 306 kW power, with 1190 rpm rated speed, vector controlled by frequency inverter.
The sugar cane mills receive the bagasse after the sugar cane has been mashed to extract the
juice (sucrose) in order to dry them between 48% and 50% of humidity. t’s very important to dry
bagasse as much as possible in order to get the better efficiency in thermal and electric energy
generation. These new sugar cane mills are able to dry the bagasse up to average moisture of
49% instead of 52% of other traditional sugar cane mills in Mexico and they have the capacity
to receive the bagasse corresponding to a rate of 100.0 tons of cane per hour.
Other machines of preparation and extraction are sized to reach this high production. The boiler
will burn bagasse up to average moisture of 49% producing steam that will be sent to the distillation,
cane diffuser and concentration equipment. Part of steam is expanded inside a turbine
that produces 8 MW of electric energy from renewable source that will be used in the plant and
exported to the Mexican government enterprise (CFE).
Crucial needs are: punctuality (start up ought to be completed before the harvest); reduced
number of reliable suppliers able to perform excellent service for the entire wide range of installed
gearmotors; product reliability; most simple and compact gearbox architecture with highest
torque rating.
BONFIGLIOLI SOLUTION
Bonfiglioli gearboxes are installed in most of equipments of distillery plant:
cane feeder conveyor, cane chopper device, cane shredder device, rotating
cutter that levels off the cane, sugar cane mills drives, belt
conveyors of solid residues, belt conveyors for ash of burned
residues, sugar crystallizer mixer drives. Bonfiglioli
delivered (on time in September 2010) 2 footmounted
reducers of new size 323 for 2 mills of
306 kW motor power each one. They have following
special features: torque limiter on input shaft,
special 1st planetary stage for high speed, squared
output shaft to be coupled with special elastic joint on
output, water/oil heat exchanger with double filter (no
down time for filter change) and lubricant pump integrated
driven by Bonfiglioli AC motor, thermostats and oil
pressure electro-valve.
Full planetary solution is the most compact and costiveness
architecture for high torque reducers. For mill with 306 kW of installed
motor power at n1=1190 rpm, bearings life time > 36 000 h and unlimited life of gears at
full motor power, max peak torque =1.2 MNm. Reliability and credibility in delivery and onfield-service
by Mexican distributor Ecomssa and Bonfiglioli USA.
Bonfiglioli products
Sugar cane
mill drives
Description
2 x X_3 23 L 3 203 FP V120 A G0A each one includes
BN 90LA 4 230/400-50 IP55 CLF B35 CUS in oil pump of water/oil heat exchanger