Bma Braunschweigische Maschinenbauanstalt Ag

Holger Fersterra

Gerald Caspers

Hartmut Hafemann

Mirko Löhn

Carsten Bonath

The invention relates to a continuous method for obtaining a crystalline monosaccharide, comprising: continuous crystallization of the monosaccharide in a main crystallizer (), wherein crystallization by evaporation and/or crystallization by cooling is carried out continuously on a crystal suspension in the main crystallizer in order to allow crystals of the monosaccharide to grow in the crystal suspension; separation of crystals of the monosaccharide out of the crystal suspension to obtain crystalline monosaccharide; continuous formation of a mass of crystallization magma for the main crystallizer () in a cascade, wherein the cascade comprises at least one first stage () and a final stage () connected in series and each stage comprises at least one pre-crystallizer (A,A), wherein, in the at least one pre-crystallizer (A) of the first stage (), a solution is seeded with monosaccharide by means of monosaccharide seed crystals in order to obtain a pre-crystallization magma, and a mass of crystallization magma for the downstream stage () is formed from the pre-crystallization magma by means of crystallization by cooling and/or crystallization by evaporation, and wherein a solution containing monosaccharide and a mass of crystallization magma from the upstream stage is supplied to the at least one pre-crystallizer (A,B,C) of the final stage () to obtain a pre-crystallization magma, and in the at least one pre-crystallizer (A,B,C) of the final stage () a mass of crystallization magma for the main crystallizer () is formed from the pre-crystallisation magma by means of crystallization by cooling and/or crystallization by evaporation; the continuous supply of a solution containing the monosaccharide and a mass of crystallization magma from the at least one pre-crystallizer (A,B,C) of the final stage () of the cascade to the main crystallizer () to provide the crystal suspension.

Continuous method for obtaining a crystalline monosaccharide and device for continuous crystallization

The present invention relates to a device for removing fluids and/or solid substances from a mixture of particle-shaped materials with a container which forms a ring-shaped process chamber with a plurality of cells separated from each other by walls, comprising an inlet cell, intermediate cells and an outlet cell, a feeding installation for conveying the mixture to be treated into the inlet cell of the process chamber, a discharge installation for discharging the mixture treated from the outlet cell of the process chamber, a ventilation installation for feeding in a first fluidisation agent, in particular in the form of overheated vapour, from below into the process chamber through an inflow floor for generating a fluidised bed in the process chamber, a heating installation for preparing the first fluidisation agent in the flow direction before the ventilation installation, swirl impellers for conditioning the flow in the container from the process chamber to the heating installation and which in part also leads to a vapour outlet, and a dust removal installation in the flow path between the process chamber and the heating installation, wherein dust can be guided to the outlet cell via the dust removal installation, wherein in order to support a transportation of the mixture from the inlet cell to the outlet cell and/or a turbulence of the mixture in the process chamber, the inflow floor comprises first unevenness and/or at least at times a second fluidisation agent, in particular in the form of overheated vapour, can be fed at least into the inlet cell essentially parallel to the inflow floor by means of first nozzles, and/or first flow guidance members are provided above the inflow floor and/or second flow guidance members are provided below the inflow floor.

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Braunschweig, Germany

Holger Fersterra