B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
B01D 37/04 (2006.01) B01D 29/01 (2006.01) B01D 37/03 (2006.01) C02F 1/52 (2006.01) C02F 11/04 (2006.01)
Patent
CA 2155034
The addition of polymeric flocculant or other chemical dewatering modifier to a suspension flowing through a service line (1) to a dewatering plant is controlled automatically in response to automatic determination of a filtration rate parameter. This may be determined using novel apparatus which includes a filtration assembly (5) comprising a chamber (7) with a filter element (4) mounted across its open end and water sprays (9) for washing the filter element In one embodiment it is preferred to assist back-washing with an air purge (13) while in another embodiment there are means (31, 36) for disassembling the filtration assembly to permit cleaning.
Cameron Timothy Ian
Field John Rodney
Glachan Mark Stephen
Tovey Peter James
Allied Colloids Limited
Borden Ladner Gervais Llp
Ciba Specialty Chemicals Water Treatments Limited
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