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Lactose or milk sugar is a substance
used in the manufacture of cheese, curdled milk, and kefir,
etc., in baby food, confectionery, soups, and sauces, as well
as in the pharmaceutical industry as a filler or binder for
the manufacture of coated pills and tablets.
Lactose requires gentle and careful processing under application
of the highest quality standards, whereby the objective is an
increase to the specific surface to improve the digestibility,
the solubility, the release of active substances and the extraction
of fat.
The following example shows a processing plant for lactose products
that was laid out to meet the customer's individual specifications.
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Legend:
A Feed product
B End-product discharge
1. Supply bin
2. Feed metering screw
3. Metal separator
4. Rotary valve
5. Mill ZPS
6. Side-channel compressor
7. Suction filter
8. Filter
9. Explosion-venting valve
10. Fan
11. Silencer
12. Heat exchanger/air filter
13. Explosion-venting valve
14. Control cabinet |
The feed product exits the dryer with a residual moisture content
of < 0.1% H2O and a fineness
value of < 500 µm.
The required end-fineness values are:
a) at least 98% < 400 µm
b) at least 98% < 63 µm
These requirements were met under application of an Alpine ZPS
Classifier Mill.
Because lactose is an organic product with the associated risk
of a dust explosion, the system was laid out to be pressure-shock-proof
to 10 bar overpressure.
The system operates in through-air mode and is suitable for
WIP.
To prevent the product from overheating, the mill air is routed
via a heat exchanger and - for hygienic reasons - a secondary
air filter.
The entire electrical system is in ex-protected design.
The entire system is operated via a PC-based control system.
The instrumentation is linked on site by means of profibus connections.
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