ontinuous wort production with high gravity up to 21 °P can be handled optimally with a high temperature process. Incoming wort with a concentration of 16 °P is equalized and mixed with isomerized kettle hop extract in a feed tank.
Then the wort is subsequently heated up in tubular heat exchangers by regenerative condensation of vapours. In a final heat exchanger the wort is heated up to 130 °C by live steam. The final heat exchanger is executed redundantly for continuous operation also in case of heat exchanger fouling and need for cleaning.
At final temperature the wort is kept for a defined time of 150-180 seconds by regulating the flow through the system. After the heat holding section, the wort is flashed in three steps down to 85 °C. The vapours are used to heat up the incoming wort stream.
After the final flash step the wort is clarified by a centrifuge and the hot trub removed. Alternatively also a double whirlpool installation would be feasible. After cooling by a plate heat exchanger, the wort is aerated, pitched with yeast and transferred into the fermentation tank.
- Heat energy consumption
(life steam 135 °C) down to 13,500 kJ/hl final wort
- Evaporation capacity
up to 8 %
- High Gravity
from 16 °P to 21 °P possible
of 1.3 hl of (11 °C to 80 °C) brewwater per hl final wort
- Optimized DMS
stripping due to final flash at 85 °C
- Optimized color and Maillard-product handling
due to variable heat holding times and low ??T between wort and heating media