GB191001353A - An Improved High Pressure Filter. - Google Patents

Abstract

1353. Burgess, J., and Muir, J. F. Sept. 6, 1909, [Convention date]. Filters with horizontal filtering partitions or layers; filtering-media; filters, cleansing.-Relates to highpressure filters in which the paper pulp or other filtering - medium is so arranged as to prevent undue packing and to facilitate the cleansing of the filter without removing the medium therefrom. The medium is placed in a number of sectional superimposed compartments having scouring-chambers 3, 4, 5, 6 arranged alternately with them. Each sectional compartment, of which three are shown in Fig. 2, is built up of strainer-plates at each end with intermediate perforated division plates separated by distancepieces consisting of a number of radial wings integral with a central boss 2<A>. In the lowest or first filtering-compartment, four division plates are employed, in the upper compartments there are only two division plates. The strainer and division plates are perforated with very fine holes or are covered with fabric to prevent the medium from passing through them. The strainer-plates are formed with projections 11, which bear against the adjacent plates to form the scouring-chambers 3, 4, 5, 6, each of which is provided with an inlet and an outlet pipe for the admission of steam or hot water and the discharge of the scouring-water. Each compartment is fitted with a pressure gauge. The liquid to be filtered enters by the pipe 21, and after passing upwards through the filter is discharged by the pipe 23. A modification is described suitable for filtering boiler feed-water containing oil; in this form the filtration takes place downwards through the filter, and means are provided for drawing off the oil which rises to the top of the filter. The filter is supported on pedestals, not shown in Fig. 2.