DURAPACK®
The efficient solution for highly corrosive thermal separation processes
The patented DURAPACK® material replacement packs are made of borosilicate glass 3.3
The packing consists exclusively of borosilicate glass 3.3, i.e. the plates are fused together without adhesive so that only borosilicate glass 3.3 comes into contact with the media to be processed.
Structured packing DURAPACK®
- made of borosilicate glass 3.3
- highly corrosion resistant
- high separation efficiency
- low pressure drop
Thermal separation processes are often used in treating and cleaning chemicals. Very common are processes that involve two liquids or a liquid and a gas. The processes used mainly involve extraction, absorption, desorption or stripping, distillation or rectification. These separation processes require mass transfer between two phases; in the above rectification example, the mass transfer between the liquid and gas phase. Keeping the equipment used in this process as compact as possible requires creating as much mass transfer surface in as small a volume as possible. DURAPACK® ensures high flow rates with low pressure drop and at the same time huge mass transfer areas for an efficient separation.
In order to intensify the mass transfer in absorption, desorption, distillation and extraction columns structured packing DURAPACK® from borosilicate glass 3.3 is the best choice for corrosive media. Applications are among other are therefore corrosive chemicals such as sulfuric acid, nitric acid, other mineral acids such as HCl but also halides such as chlorine, bromine and iodine: short wherever metal material but also plastic fail.
DURAPACK® patented structured packing consists of alternately allocated corrugated plates made of borosilicate glass 3.3 with channels at an angle of 45°. In order to increase the turbulence the corrugations are notched. The packing is only made from borosilicate glass 3.3, i.e. the plates are sintered together without any gluing material so that only borosilicate glass 3.3 is in contact with the media to be processed.
The easy-to-clean smooth and inert surface is extremely convenient.
Wall wipers
PTFE strips to boost efficiency
Liquids tend to collect and flow down on the inner walls of columns fitted with packing, an effect that prevents the liquid from wetting the packing surface and keeps most of it out of the mass transfer process. This reduces the efficiency of the column. This means that the liquid should be returned into the packing from the wall at regular intervals to restore the system’s efficiency. We have developed PTFE wall wipers and guiding funnels that either integrate into the column sections or surround the structured packings in bands.
DURAPACK® structured packing can be used either in glass columns or in columns made of other material such as glass-lined steel, PTFE-lined or Tantalum cladded materials. In QVF® glass columns up to a nominal width of DN1000 the gap between the packing and the inner column wall is closed by the standard wall wipers. Special precision bore glass pipes are not required. Using other columns material the inner diameter must be well defined to cope with the gap by the standard wall wipers.
All packaging elements have a height of 200mm. Smaller heights are available upon request. Up to a nominal width of DN300 the packaging elements have two wall wipers, for DN450 and above one wall wiper per layer is sufficient. DURAPACK® segments with flexible wall wipers can be installed in standard glass column.
LECHOS DE RELLENO
La altura de los elementos de relleno para todos los diámetros es de 200 mm. Los DURAPACK® con diámetro nominal de DN100 a DN450 constan de un solo elemento, por lo que pueden ser colocados en un anillo de soporte. Los rellenos con un diámetro nominal de DN600 o superior están divididos en segmentos individuales y requieren por tanto una bandeja o rejilla como soporte para el lecho de relleno.
Debido a la segmentación, no hay límites para diámetros mayores. Las columnas de vidrio QVF® están disponibles hasta DN1000. Las columnas esmaltadas de DeDietrich® se fabrican a un diámetro nominal de hasta DN2400. La altura máxima de relleno por bandeja de soporte es de 5 m.
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