World Cement - November 2018

56 / 140

The SmartPulse EVO II adjusts filter cleaning parameters
to cater for fluctuating plant operating conditions. This
ensures that only the minimal required cleaning is carried out
at any given time. This smarter way of cleaning reduces costly
compressed air usage and extends filter bag life. Figure 2
shows the SmartPulse EVO II following the actual load from
the cement mill. The dP settings in the filter controller will
always follow the actual dP, as indicated by the red line.
Continuous monitoring
To support the continuous analysis required to optimise
filter systems, when developing the next generation
controller FLSmidth chose the Smart Pulse Controller (SPC)
microprocessor technology. Compared with programmable
logic controller-based systems, the SPC provides faster and
more efficient detection and monitoring.
The SPC system controls all the equipment related to
the filter by combining various software controllers for
different functions in a centralised location. This includes
the master controller, valve controller, hopper controller,
and fresh air damper controller. The benefit of having all
of these functions in one place is to allow pre-determined
parameters to be entered only once at commissioning.
Additionally, the system can match the specific needs of any
cement mill fabric filter.
Troubleshooting
Online monitoring by specialists allows the cement plant
operator to receive specific preventive maintenance
suggestions, enabling planning for filter maintenance
and reducing unplanned downtime. Furthermore, early
detection of a failed filter bag prevents dust pass-through,
costly emissions fines, and production shutdowns. The
SmartPulse EVO II is designed to quickly identify defective
bags through rapid and precise failure detection, simply by
switching off the row in which a defective bag is found.
Reducing costs
New technologies can contribute to operating expense
reduction through the introduction of longer filter bags,
combined with optimal cleaning at low pressure. Not only
does this reduce emission levels, it also provides lower
differential pressure, lower compressed air consumption
rates, and prolongs filter bag life. Extensive testing has
demonstrated that cement plants with 10 m long filter
bags have a smaller environmental footprint, lower capital
outlay, and operation and maintenance costs than filters
with shorter bags.
The combination of optimised design, improved
mechanical construction, and advanced filter control results
in reduced and easier maintenance, compared to other
types of fabric filters on the market. For FLSmidth, the
SmartBag coupled with the SmartPulse EVO II meets the
needs of modern day cement mills.
About the author
Lars Gamborg is the Product Manager of fabric filter technology
at FLSmidth A/S.
The Netherlands | | |
Solid partners for powder and bulk handling components
YOUR SERVICE & KNOWLEDGE SUPPLIER OF RELIABLE COMPONENTS
FOR BELT BUCKET ELEVATORS
POLYSUR® FERRO
STEEL CORD BELT
FOR BUCKET ELEVATORS
Specially designed for heavy duty and
high heat industrial applications with
long centre distances.
Assuring optimum performance
and maximum service life.