B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
183/114, 182/19
B01D 33/74 (2006.01) B01D 29/92 (2006.01) B01D 33/04 (2006.01)
Patent
CA 2036096
- 1 - METHOD AND APPARATUS FOR REMOVING LIQUID FROM THICKENERS FILTERS, WASHERS AND CORRESPONDING DEVICES ABSTRACT OF THE DISCLOSURE The present invention relates to a method and an apparatus for removal of liquidfrom thickeners, filters, washers and the like dewatering devices. The known water separating devices comprise a drop leg and a large filtrate tank in which gas is removed from the gas-containing filtrate supplied via the drop leg, to reduce the problems caused by the gas in pumping the filtrate. The method of the invention obviates the need of both the drop leg and the filtrate tank. The filtrate is guided from the dewatering apparatus via an enclosed flow passage to a filtrate pump and the pressure difference required by filtering is at the same time generated at least partially by the said pump. The above described method is carried out by a filtrate removing apparatus whichcomprises a filtrate duct (22, 42, 62) which forms an enclosed flow passage, and a filtrate pump (23, 43, 63) connected thereto.
Immonen Pasi
Kohonen Raimo
A. Ahlstrom Corporation
Gowling Lafleur Henderson Llp
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