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Tetra Therm® Aseptic VTIS - Direct UHT treatment unit

Tetra Therm® Aseptic VTIS - Direct UHT treatment unit
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Tetra Therm® Aseptic VTIS - Direct UHT treatment unit - 1

Tetra Lactenso™ Aseptic Tetra Therm® Aseptic VTIS Direct UHT treatment unit For direct UHT treatment in tubular or plate heat exchangers, available as a separate unit or as an integrated part of a Tetra Lactenso Aseptic dairy production solution, with guaranteed performance. Before production can start, it is necessary to sterilize the aseptic area by circulating pressurized hot water. After sterilization, the unit is cooled down to production temperature. Finally, sterile water is circulated through the product circuit. Production starts by lling the unit with product via the balance tank. The product displaces the water/product mix to the drain or reject tank. A specially designed balance tank and valve arrangement minimizes the amount of mixed product. Aseptic processing unit for continuous UHT treatment with direct steam injection. Mainly for heat-sensitive low-acid products such as milk, enriched milk, cream, soy milk, formulated dairy products, ice-cream mix, dairy desserts as well as ESL (extended shelf life) products. Working principle The unit is fully automated to safeguard the aseptic status while in production. The operation can be divided into four steps: • Pre-sterilization • Production • Aseptic intermediate cleaning (AIC) • Cleaning in place (CIP) When an aseptic tank or lling machine is ready, production can start. The product is regeneratively pre-heated to about 80 °C in a Tetra Spirao tubular heat exchanger or, as an alternative, in a Tetra Plex plate heat exchanger. Instant heating to sterilization temperature takes place in the steam injector by continuous injection of high pressure steam into the product. The product enters a holding tube where it is held at sterilization temperature for the required period of time. The product then enters the ash vessel where the pressure and temperature drop instantly. The excess water in the form of steam is ashed off.

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Tetra Therm® Aseptic VTIS - Direct UHT treatment unit - 2

For optimal product stability, the product passes through an aseptic homogenizer before nal cooling in the heat exchanger. Aseptic intermediate cleaning (AIC) can be performed to prolong the production time between full CIPs. When AIC is selected, the product is displaced by sterile water before cleaning starts. During the AIC sequences, the holding tube is kept at the sterilization temperature, thus keeping the aseptic parts of the unit sterile. The AIC can be performed either with lye only or lye and acid ush. After each production run, the unit undergoes CIP with both lye and acid. If...

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Tetra Therm® Aseptic VTIS - Direct UHT treatment unit - 3

Flow chart for Tetra Therm Aseptic VTIS based on tubular heat exchanger (options) cooling water Control panel Improved production time • Free-standing control panel with frame and connection box mounted on main module • Holding tube for stabilization of proteins • Reduced lactulose value at reduced capacities • Additional information and communication from homogenizer. Special product treatment • Extra security switches for each motor • Direct heating by steam infusion • Non-standard layout • Other process temperatures (5 recipes as standard) Production safety • Extra holding tubes •...

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Tetra Therm® Aseptic VTIS - Direct UHT treatment unit - 4

Tetra Therm Aseptic VTIS – direct UHT treatment Technical data Approx. consumption data for tube and plate heat exchanger based unit 2,000 – 30,000 l/h and per 1,000 l of product and standard temperature program 5-80-140/4 s-81-homogenization-20/25ºC. Approx. consumption data for tube and plate heat exchanger based unit 2,000 – 30,000 l/h and per 1,000 l of product and standard temperature program 5-80-150/6 s – 81-homogenization –20/25 ºC. • Steam, 7 bar(g): 150 kg/h • Steam, 7 bar(g): 135 kg/h • Cooling water, 3 bar(g), 30°C: 1,500 l/h during production, 1 000 l/h during pre-sterilization...

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