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This filtration system consists of a stack of membrane filters sandwiched between sheet metal frames. The hot water circulates between the frames, heating the metal frame and drying the filter cake. Due to the new design structure it is possible to filter on both sides, thus reducing the filtering time. Moreover, the new structural design allows vacuum to be applied simultaneously during the heating of the filter plate. The filter cake can be dried to a moisture content of less than 1%. The heat transfer rate of the metal plate is about 4 times higher than that of the plate made of PP. In order to prove the superiority of its performance,
Run tests with a 20-millimeter lime cake showed that the water content can be reduced to 1% in about 1 hour when operating at pressures below 100°C and 4 kPa, compared to about 4 hours for a conventional vacuum dryer. . For viscous suspensions, this design structure is particularly suitable. At present, the capacity of this filter can be achieved at a level of 1 to 5 kt/a, which is suitable for the fine chemical and pharmaceutical industries.
Vacuum filter press with drying function comes out
Filtech (Filter Technologies) of Wiesbaden, Germany, introduced a heated plate filter developed in cooperation with Bayer Technical Services and Strasbourg Filters, which can also be converted into a conventional filter press. The filter combines filtration and drying in a single unit, which greatly reduces the time and investment costs of the D process. In addition, the cleaning of the suspension or filtrate channel can also be combined on the downstream side of the filtration process, which is also not possible with conventional plate filter presses.