5th April 2006
SANICIP™ – A New Generation of CIP-able Bag Filters
Higher yield, improved product quality, energy savings and quieter operation
are just some of the benefits users may expect from SANICIP bag filters from
GEA Niro, on show at ANUGA 2006.
In the past, powder recovery from spray dryer exhausts has been with
cyclones, on their own or with textile bag filters or wet scrubbers. This
latest generation of CIP-able bag filters works in a completely different way,
without cyclones, to save money and improve product quality.
The SANICIPTM bag filter uses reverse jet technology to save
compressed air and make sure that powder is removed from every part of the bag.
Bags are made from 3-layer gradient polyester material with a special
dust-releasing surface. Condensation and risk of mould growth is minimised by
using re-circulated dry air within the process.
The filter itself consists of a cylindrical bag housing with spiral shaped
air inlet, clean air plenum on top with fluidized powder discharge. During
operation the product collected on the outside of the material is removed by a
compressed air stream from the inside of each bag. The bags are clean-blown
individually resulting in a very even discharge of powder and achieving high
air-to-cloth ratios. The frequency and duration of the cleaning sequence can be
adjusted to suit actual running conditions.
The CIP process uses atomized water to clean bag material from the inside.
The process includes: initial rinse, pre-rinse, caustic wash, middle rinse,
acid wash, and final rinse and drying. The entire process takes
approximately 6 hours.
The system works at low pressure so saves energy and is quiet too. The
process produces no second-grade product so the final yield is higher than with
cyclones.
SANICIPTM systems can easily replace existing cyclones for
retrofit. Systems using SANICIPTM occupy much less space that
those using cyclones allowing users to operate effectively in smaller premises
or expand production without the need for additional buildings.