Belt pressure filter

Details Belt pressure filter Belt pressure filter

B - Operations, Transporting

01

D

182/53, 362/61

B01D 33/00 (2006.01) B01D 33/04 (2006.01) B01D 37/03 (2006.01) C02F 11/12 (2006.01) B01D 33/37 (2006.01) B01D 33/64 (2006.01) B01D 33/72 (2006.01) B01D 33/80 (2006.01)

Patent

CA 1157390

ABSTRACT OF THE DISCLOSURE: A belt pressure filter comprises a gravity dewatering zone for dewatering a sludge to be dewatered as a function of the gravity and a forcible dewatering zone for forcibly dewatering the sludge by means of external pressure. An endless filter belt is provided to travel from the gravity dewatering zone to the forcible dewatering zone. The coagulated sludge is supplied onto the filter belt by means of the gravity dewatering zone. Information representing the level of the sludge deposited is obtained as information concerning the dewaterbility of the coagulated sludge supplied onto the filter belt. The traveling speed of the filter belt is operated or calculated based on the above described level information. The optimum amount of dosage of a coagulating agent is determined based on the traveling speed of the filter belt as calculated. As a result, the water content in a cake as dewatered is maintained low and constant, while an amount of coagulating agent most suited to the sludge characteristics at that time is dosed.

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