Honey Tank Heater in Cereal Production – Steam Pressure Reduction
Dr.-Ing. Stefan Nehlsen
Mankenberg Valves - firmly in control since 1885.
Cereal products have become vital for our everyday life. The available flavors are confusingly varied, but bee honey is still an important ingredient for many of these sweet meals.
Honey, that enhances the taste of popped grains or cereal bars, loses its flowability under cooler temperatures and transforms into a viscous mass. To prevent this from happening, honey must continuously be heated to a temperature level of approx. 30 to 40 °C.
A leading company in the foodstuffs industry fabricates semi-finished and finished grain products. In the production plant there is a tank of approx. 40 m3 filled with honey which is constantly heated in order to keep the tank content capable of being pumped. In the heating circuit, a steam generator produces water steam with a pressure of 8 bar absolute. In the downstream steam supply line, the pressure of the generated steam is reduced to 4 bar absolute with the help of Mankenberg′s pressure reducing valve and flows through a ball valve that opens pneumatically as soon as the temperature falls below 40 °C.
After that the steam flows into a heat exchanger, condenses there and dissipates the heat to the environment. The arising condensate is separated in a steam trap, flows back in the return line to the condensate collector and is then re-supplied to the steam generator. Mankenberg′s self-acting pressure reducing valve reduces the steam pressure downstream of the valve to the suitable plant pressure of 4 bar absolute.
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Mankenberg Pressure Reducing Valve DM 618Z
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