Reasons for the concentration of liquids in GEA Wiegand evaporation
plants
In thermal separation technology, GEA Wiegand evaporation plants are used
for the concentration of liquids in the form of solutions, suspensions and
emulsions.
Concentration is part of the production
process.
Example: sugar.
The solution containing sugar has
to be concentrated in an evaporation plant before crystallization. Sugar cannot
be crystallized from thin sugar solution.
The product quality
will be improved.
Example: apple juice.
The quality of
apple juice is improved if the apple juice concentrate and the aroma
concentrate out of an evaporation plant are stored separately and are remixed
and rediluted as required.
Example: rectification of alcohol.
A
large number of volatile impurities (up to 500) can be specifically separated
by rectification. In this way high-purity drinking alcohol is produced.
Production costs will be decreased.
Example:
production of pectin.
If pectin is precipitated from a concentrated pectin
solution, a lower quantity of precipitating agent is required than for the
concentration of pectin from thin solution.
Products will be
recovered.
Example: silver.
Silver can be recovered from
photographic effluents by means of concentration in an evaporation plant.
Storage and transport costs will be reduced.
Example: starch effluent.
The storage of concentrated
product requires considerably less storage space than the storage of thin
solution.
When liquid products for the food industry are transported, it is
often cheaper and easier to remove the water in an evaporation plant and to add
it at the place of destination.
Waste disposal costs will be
reduced.
Example: industrial effluent
By concentrating
effluents in an evaporation plant the amount of waste is reduced. Concentrated
effluents can be used as energy carriers and pure water can be retained as
valuable material.
Example: recovery of solvents
Stripping and
distillation does not only separate substances polluting water, but renders the
solution clean to such an extent that it can be reconveyed to the production
process.
Disposal and dumping costs will be reduced by means of
crystallization.
Example: industrial waste water containing
salt.
The industrial waste water produced can be compressed to such an
extent that the salt contained in the waste water can be easily crystallized
and separated, i.e. the dumping costs are only limited to the relatively small
quantities of salt. The water evaporated can be reused as process water.
Valuable substances are separated from a solution by means of
crystallization.
Example: pharmaceutical industry
Pharmaceutical substances can be separated from an aqueous synthetic
solution by means of crystallization.
Many of the world's leading
manufacturers are GEA Wiegand customers because our plants are designed to the
strictest safety and highest performance standards. GEA Wiegand offers
technology to the manufacturers of many chemical, dairy, food, and
pharmaceutical products by supplying individual plants or engineering of
complete processing lines.
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