Improvements in or relating to the removal of excess water from aqueous slurries or suspensions

• Main Author: JOHNSON JOHN ARTHUR
• Format: Patent
• Language: English
• Published: 07.05.1958

794,733. Filters. SERVICE (ENGINEERS), Ltd. June 11, 1956 [March 12, 1955], No. 7293/55. Class 46. Aqueous slurry (e.g., of the type that tends to settle out rapidly on standing such as coal slurry or pottery slip) is pumped by a pump 16, preferably a reciprocating pump of the construction described in Specification 677,136 [Group XXVIII], along a pipe 14, 18 leading from a storage receptacle 12 to a filter press 20, some, however, of the slurry being returned via a union 22 and a branch pipe 24 to the receptacle 12. Initially water can escape readily from the filter press and the pump encounters little resistance therein so that only a small part of the slurry passes along the pipe 24. Subsequently pressure rises in the press but the pump is enabled to maintain full output by escape of the greater part of the slurry along the pipe 24. Since the union 22 is close to the press, little settlement occurs except in the press. The branch pipe 24 ends in a nozzle 26 so arranged as to keep the slurry in the receptacle 12 stirred.