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API Schmidt-Brettens' evaporization systems with SIGMASTAR® climbing-film plate evaporators are used in the food industry, in the organic and chemical industry and for wastewater treatment.
The unique construction of the SIGMASTAR® evaporization plates makes it possible to apply SIGMASTAR® in a number of different evaporization processes. With problem products (e.g. viscous streams, slurries, and liquids with fouling tendencies) which cannot be processed with falling film evaporators, the SIGMASTAR® evaporizer performs especially smoothly and successfully.
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One of the most important fibers, polyamide 6, is produced by polymerization of caprolactam. Large quantities of extraction effluents are produced in this process. The effluents are cleaned in evaporation plants: the valuable substance is recovered, waste products are minimized, and existing energies from the caprolactam production can be used.
Moreover, evaporation plants are used in this process as sump evaporators for distillation plants.
The particular features of GEA Wiegand plants are:
Economic conception in order to minimize the caprolactam losses
Long operating periods thanks to an optimum temperature
Many years of experience in the application of mechanical vapor recompressors
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GEA Wiegand designs and constructs complex plant systems for the treatment of effluent and the recovery of solvent. The concepts of the different operating processes mainly focus on high degrees of purity, the energetic situation and low residual product quantities.
For the treatment of industrial effluent, our process engineers develop concepts for plant systems that are especially designed for the relevant effluent problem on the basis of a detailed analysis of the current situation.
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Steep and wash water that contain a high proportion of valuable nutrients are produced during the processing of corn, potatoes and rice. For recovering these nutrients, steep and wash water are concentrated in evaporation plants, namely corn steep water to 50 % TS, wash water from the production of wheat starch to 20 - 30 % TS and potato starch effluent up to 60 - 70 % TS.
5-effect falling film evaporation plant for monosodium glutamate heated by thermal vapour recompressor, evaporation rate: 25,000 kg/hr
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GEA Wiegand designs and constructs complex plant systems for the treatment of effluent and the recovery of solvent. The concepts of the different operating processes mainly focus on high degrees of purity, the energetic situation and low residual product quantities.
For the treatment of industrial effluent, our process engineers develop concepts for plant systems that are especially designed for the relevant effluent problem on the basis of a detailed analysis of the current situation.
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For the production of fruit juice, fruit and vegetable juice is concentrated from stone, pomacious and soft fruit from approx. 11 % TS to approx. 72 % TS or citrus juice is concentrated from 10 % TS to 60 - 70 % TS. Normally evaporation plants are used for this.
Before or during the evaporation process, volatile aroma substances are extracted from thin juice. These aroma substances are removed and added to the fruit juice later on for intensifying the typical fruit flavor.
The concentration of fruit and vegetable juice means:
the possibility of compensating differences in quantity and quality of different vintage.
the possibility of compensating fluctuations in price in years of cheap and expensive fruit (large and small harvest)
the possibility of storing 6 or 7 times as much harvest in the existing tank space available
considerably less requirements on the storage process
reduction of investment costs, because the apparatures for the production of concentrate are cheaper and involve lower manufacturing costs than the storage tanks that would be necessary otherwise.
simpler and cheaper transportation, because weight and volume of the juice are reduced to a fraction.
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For the production of starch conversion products, the starch molecules are either entirely or partially broken down into their basic constituents by hydrolysis, i.e. by catalytic action of acids and enzymes in an aqueous suspension.
Dextrose
pure D-glucose, a final product that cannot be hydrolytically decomposed any further.
Glucose syrup (starch syrup)
contains D-glucose, maltose, isomaltose and high molecular sugar and it is produced by prematurely stopped hydrolysis. The decomposition degree of this product ranges from 20 to 65 DE. The DE value (dextrose equivalent) indicates the degree of conversion. It refers to the content of D-glucose relative to the total dry substance.
Maltodextrine
a starch decomposition product of less than 20 DE and more than 3 DE.
Maltose syrup
consists of approx. 72 % maltose, 18 % glucose, 10 % iso-maltose. It is produced by enzyme conversion of starch of different origin.
Isoglucose syrup
partially isomerized glucose juice (FCS = high fructose corn syrup).
Typical composition:
D-glucose 53 %
D-fructose 42 %
oligo-saccharide 5 %
The indexes 42, 55 or 70 indicate different fructose contents.
D-sorbitol
reduction product of D-glucose (starting material for vitamin C synthesis).
D-mannitol
reduction product of D-glucose.
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Gelatin is a high-value natural product which is recovered from animal substances. After a chemical pretreatment, the initial product is extracted in hot water. The gelatine solution recovered in this way is then filtered, concentrated, sterilized, and finally dried. Both plate evaporators and tube evaporators are used for the concentration.
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