Abstract:
A filtration apparatus comprised of a rotary drum having a plurality of internal vanes for conveying slag material is presented. The slag is conveyed upwardly by the vanes, after which is falls freely onto a conveyer belt passing longitudinally through the drum. Deflectors guide the slag during its fall onto the belt. The deflectors are divergent and inclined relative to the direction of movement of the conveyer belt. The rotatable drum is axially subdivided into a plurality of sections, the vanes of each section being angularly offset in relation to the vanes of adjacent sections. The filtering apparatus herein effects uniform charging of slag material onto the conveyer belt.
Abstract:
A process for removing colloidal and soluble contaminants from impure water moving through a hollow, cylindrical microscreen under a positive head pressure, comprising dispersing insoluble, finely divided particulate matter into the impure water and rotating the microscreen at a rate that will form, during each rotation thereof, an intermixed layer of contaminants and particulate matter over substantially the entire inner surface of the microscreen through which the impure water is passing. The intermixed layer forms a filter substantially impermeable to contaminants and particulate matter of a size that could pass through the microscreen pores, but it is not impermeable to water. Preferably, the finely divided particulate matter can be a sorbent material, e.g. powdered activated carbon, so that contaminants are both filtered and sorbed from the water.
Abstract:
A continuous treatment apparatus for treating sewage in a sewage treatment plant or waste liquid in a factory comprising a rotary drum wherein the peripheral wall is constituted by pectinately juxtaposed stationary rings and movable rings interposed with minute clearances therebetween and slidable in the circumferential direction so that the sewage is filtered through the said minute clearances while the drum is rotated, sludge or solids being intercepted on the outside of the drum while the sewage is filtered through the said minute clearances, the drum being free from clogging since the sludge or solids are ejected by the circumferential sliding of the movable rings.
Abstract:
The invention relates to a cleaning unit for power driven pumps which are required to pump fluids containing significant quantities of particulate material of greater spcific gravity than the fluid. A portion of the pressured fluid output of the pump is utilized to drive a fluid motor which in turn rotatably drives a centrifugal separator. The separator has its inlet connected to the source of particulate containing fluid and effects the centrifugal separation of such fluid into two streams, respectively a clean fluid stream and a particulate containing stream. Means are provided for discharging the particulate containing stream and a diffuser means is provided for converting the rotational energy in the clean fluid stream into a pressure head which is employed to transfer the clean fluid to the inlet of the pump.
Abstract:
A rotatable self-cleaning drum shaped filter is partially submerged in a source of water and encloses the inlet of a conduit connected to a ditch pump. A part of the flow of water drawn through the conduit by the ditch pump rotates a water turbine, which turbine is mechanically connected to the drum shaped filter to rotate the drum shaped filter about its longitudinal axis. Simultaneously, a plurality of stationary nozzles forcibly spray a filtering element of the drum shaped filter as the filtering element rotates therepast to remove debris from the filtering element and prevent clogging of the drum shaped filter and water starvation at the inlet to the conduit.
Abstract:
The filtered liquid present in the rotating compartments of the core of a disc filter is suctioned out of the filter through two separate zones. Muddy or turbid filtrate is drawn out as the compartments pass through a first zone lying near the bottom point in the rotation of the compartments. Thereafter, the compartments pass through a second zone located in the region of the first 60.degree. of the upward movement of the compartments, in which zone the clear filtrate is drawn out. The compartments have a slight axial pitch and their surfaces are concave so that, as the compartment moves in the upward direction, the filtrate flows towards the discharge ports of the filter.
Abstract:
The specification discloses an improvement in rotary screening apparatus for the filtration of liquids and especially water. Such apparatus comprises (a) a stationary structure including a delivery channel for the feed water and a screened water holding tank wherein a lower elevation of screened water is maintained and (b) a screen drum disposed to receive feed water from the channel and to rotate within the tank on a horizontal axis with the uppermost section of its cylindrical surface above the feed for cleaning purposes. The improvement resides in a seal between the holding tank and the drum which provides improved protection against leakage and utilizes a flow of screened water which drives the feed water away from the seal if and wherever there may be a leak.
Abstract:
An improvement in the positioning and cutting of a comminuting and screening device of the type having a rotary screen formed of co-axial rings with outwardly directed cutters which coact with stationary cutters supported on a flow directing enclosure which is positioned in a flow channel by eccentric locks pivoted on the enclosure and frictionally engaging sides of the flow channel, the stationary cutters having a cutting edge coacting with a cutting edge on the end of the screen cutters and a cutting edge extending between the rings, the space between adjacent rings increasing from upstream to downstream sides of the rings.
Abstract:
A rotary filter including a fluid-actuatable motor for supporting and moving a reservoir up and down relative to the filter and having a knife means which has a cutting edge and a scraper means engageable with the knife means as the latter is moved from the operative to the inoperative position to displace from the knife means material removed from the filter and adhered to the knife, the scraper also being engageable with the cutting edge as the knife is moved towards the inoperative position to thereby hone the cutting edge.
Abstract:
A filter centrifuge wherein a drum is rotated about a central axis at high speed so as to drive the liquid phase of a liquidsolid suspension out through a filter medium has a liquidcollecting chamber radially outside of the filter medium and provided with an outlet from which the liquid passing through the filter cake is expelled. A venturi pump in the drum has a suction side connected to the liquid-collecting compartment radially inwardly of the outlet thereof so as to produce a negativepressure gas head that serves to draw air and any remaining liquid through the filter cake after most of the liquid phase has been drawn off. In addition during operation of the filter centrifuge this venturi pump, which may be driven by the liquid phase as it issues from the compartment or by a fluid fed especially into the drum for this purpose, serves to maintain a predetermined negative pressure in the compartment under the filter medium.