Introduction Vacuum filter press completes filtration and drying at the same time

Filtech (Filter Technology) of Wiesbaden, Germany, has introduced a heated plate filter developed by Bayer Technology Services and Strasbourg Filters, which can also be converted into a conventional filter press. The filter combines filtration and drying in one unit, thereby greatly reducing the time and investment cost of the butyl filtration 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 not possible with conventional plate filter presses.

This filtration system is superposed by a membrane filter plate sandwiched between metal plate frames. The hot water is circulated between the plates and frames, the metal plate frame is heated and the filter cake is dried. The new design structure enables double-sided filtration, which reduces filtration time. Moreover, the new structural design can simultaneously apply a vacuum during the heating of the filter plate, and the filter cake can be dried to a level of less than 1% water content. 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,

The running test with a lime filter cake of 20 ram thickness shows that the water content can be reduced to 1% in about 1 hour when operating at pressures below 100 ° C and 4 kPa, while the conventional vacuum dryer takes about 4 hours. . This design is particularly suitable for viscous suspensions. 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.

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