Tetra Therm®Lacta 1 - Pasteuriser unit0 pages

Tetra Therm®Lacta 1
Pasteuriser unit

Application
Tetra Therm Lacta 1 is a pasteuriser unit designed for
continuous processing and pasteurisation of market milk,
yoghurt milk and ice-cream mix.

Working principle
Tetra Therm Lacta is as standard equipped with semiautomatic controls. From the control panel, the operator
initiates the required functions, such as starting the pumps
and changing the set point on the temperature controller.
The pasteurisation temperature and the position of the flow
diversion valve are continuously recorded.
Main process sequences can be divided into the following
main steps:
• Pre-sterilisation
• Filling
• Production / circulation
• Emptying
• Cleaning-In-Place

Before production can commence, it is necessary to sterilise
the unit by circulating hot water for 20 minutes. After presterilisation, the unit is cooled down and stabilised to
production temperatures.
When down-stream equipment is ready, the production can
start.
Production starts by filling the unit with product via the
balance tank. The product displaces the water/product mix
to drain or reject tank.
Before being homogenised in a Tetra Alex homogeniser,
the product is regeneratively pre-heated in a Tetra Plex
plate heat exchanger by the outgoing pasteurised product.
To ensure even heat load on the product, final heating takes
place in the PHE by means of an indirect hot water circuit.
The product is held in a holding tube for the required period
of time.
If the pasteurisation temperature gets too low, an automatic
flow diversion valve, placed down-stream of the holding
tube, diverts the product back to the balance tank.
After the holding tube, the product is cooled by the
incoming product in the regeneratice section of the PHE.