Bma Braunschweigische Maschinenbauanstalt Ag

Bma Braunschweigische Maschinenbauanstalt Gmbh

Andreas Lehnberger

Dirk Spangenberg

Folker Aljets

Jens Mahrholz

Jörg Schmidt

Igor Djoukwe

Reno Spoors

Igor DjoukwÉ

Thomas Schulze

Dirk Steffens

The invention relates to a cooling crystallizer () for saccharose magma in a vertically oriented container () which has an upper inlet () for supplying magma and a lower outlet () for discharging magma, comprising multiple cooling blocks () which are mutually spaced in a vertical direction. A heat carrier fluid flows through the cooling blocks (), and the cooling blocks are coupled to a heat exchanger in order to dissipate heat from the magma, wherein multiple cooling blocks () are combined to form a cooling packet (), and the cooling packets () are designed as separate cooling circuits with separate heat exchangers ().

Cooling crystallizer and sugar crystallization method

A method for obtaining crystals from a mother solution operates such that mother solution is fed into a crystallisation device. Supersaturation of the mother solution is brought about by open and/or closed-loop control of the temperature (&#x25a1;). Seed crystals are added to the mother solution at a seeding point (Sp). The seed crystals are grown as nuclei by continuous closed-loop process control and are finally removed from the method as crystals. They form the product yield. The formation of crystal nuclei in the mother solution is countered by steps in the closed-loop process control. During the closed-loop process control and the crystallisation procedure, the position of the limit (M) of the formation of secondary nuclei is determined using sensors that detect data currently, wherein the position of the limit (M) is established as a value of the concentration (c) and the temperature (&#x25a1;) from these data. This determined position of the limit (M) of the formation of crystal nuclei is used as the basis for the closed-loop process control of the crystallisation.

Method for obtaining crystals from a mother solution, and crystallization device suitable for this purpose

A device having a centrifuge operating discontinuously in batch-type manner for separating syrup from sugar massecuites including a centrifuge housing having a wall and a base, as well as a cylindrical centrifuge drum in a centrifuge housing having discharge openings. A first receiving container serves for the reception of a green discharge. A second receiving serves for the reception of a white discharge. A control device and valve or shut-off assemblies controllable by the control device are provided at or in the discharge opening or in connecting lines for the purposes of separating the green discharge and the white discharge. At least one sensor is provided in the transport path of the syrup. The sensor includes a measuring device for the measurement of a physical value which is representative of the difference between green discharge and white discharge. The control device controls the valve or shut-off assemblies in dependence on the measured values of the physical value transmitted by the sensor.

Device having a discontinuously operating centrifuge for separating syrup from sugar massecuites and method for operating such a device

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Braunschweig, Germany

Andreas Lehnberger