A high-pressure filter is provided, which belongs to the field of filter device technologies, and comprises a trough, a filter disc, a power device, a spiral stirring device, and a compressed air storage tank. A sealed housing is disposed outside the trough, and an inner wall of the sealed housing is connected to an outer wall of the trough to form a sealed cavity. The compressed air storage tank is in communication with the sealed cavity, and compressed air is supplied to the sealed cavity to form a high pressure environment in the sealed cavity. Therefore, a pressure difference is formed between the interior and the exterior of the filter disc to improve the filtering efficiency.

A rotary disc filter includes one or more filter discs secured to a rotary drum and include a series of circumferentially spaced backwash guides disposed in the filter disc. During backwashing, the backwash guides function to engage a mixture of backwash and suspended solids and guide or direct the mixture to a sludge trough disposed in the disc filter. The backwash guides generally assure that a greater percentage of the backwash and suspended solids mixture end up in the solids trough.

A disc filter includes a filtrate holding tank disposed below a series of disc-shaped filter members supported on a drum. Filtrate from the holding tank is used to backwash filter media on the disc-shaped filter members. Filtrate is discharged from the holding tank via a filtrate conduit. Bypass water is directed through a bypass conduit in the disc filter and mixed with the filtrate downstream of the filtrate holding tank. This assures that the filtrate used to backwash the filter media does not include bypass water.

A disc filter includes a filtrate holding tank disposed below a series of disc-shaped filter members supported on a drum. Filtrate from the holding tank is used to backwash filter media on the disc-shaped filter members. Filtrate is discharged from the holding tank via a filtrate conduit. Bypass water is directed through a bypass conduit in the disc filter and mixed with the filtrate downstream of the filtrate holding tank. This assures that the filtrate used to backwash the filter media does not include bypass water.

The present invention is to provide a separation apparatus for separating a liquid from a treated object containing the liquid in the course of a process of sending the treated object with each rotating plate being rotated, wherein efficient separation of the liquid from the treated object can be performed, while the rotating plates are efficiently prevented from getting damaged.

The separation apparatus comprises a plurality of rotating shafts 9 formed in a lateral direction while being arranged in parallel in a longitudinal direction, a driving device 7 for rotationally driving each rotating shaft 9, and a plurality of rotating plates 12 mounted on each rotating shaft 9 in parallel in a lateral direction while being in such an attitude that their plate thickness direction is oriented in a direction along the lateral direction, wherein spaces S1, S2 through which the liquid contained in the treated object is allowed to drop are formed between the mutually adjacent rotating plates 12 in the lateral direction or those in the longitudinal direction, the rotating plates 12 are configured so as to periodically repeat a state of being projected upward and a state of being not projected upward, while being elastically deformable in a direction along said each rotating shaft 9.

A frame-type disc filter (100) is provided with a bypass water collector (33) disposed adjacent an inlet to the disc filter. Influent water overflows the inlet into the bypass water collector. A conduit is communicatively connected to the bypass water collector for directing the bypass water from the frame-type disc filter to an effluent channel that is independent of the frame-type disc filter.

A frame-type disc filter (100) is provided with a bypass water collector (33) disposed adjacent an inlet to the disc filter. Influent water overflows the inlet into the bypass water collector. A conduit is communicatively connected to the bypass water collector for directing the bypass water from the frame-type disc filter to an effluent channel that is independent of the frame-type disc filter.

A modular support structure comprising multiple chord or arc modules configured to selectively fixedly engage adjacent modules to define a completed annular support structure configured to support a rotary element of a rotary filter. The modular chord or arc segments may fixedly engaged an adjacent chord or arc segment through a fixing mechanism selected from the group consisting of: fasteners, clamps, pins, bolts, locks, locking mechanisms, key and socket mechanisms, spot welding, welding, adhesives, and other fastening mechanisms configured to engage and disengage adjacent chord or arc modules with ease.

Disclosed herein are disc filters for dewatering a fiber suspension. According to a first aspect, the disc filter includes a vessel comprising an inlet positioned in a wall of the vessel, the inlet introducing a fiber suspension into the vessel. The disc filter further includes a rotor shaft comprising a shaft axis of rotation positioned in a shaft plane, wherein the shaft plane is a horizontal plane. At least one filter element may be coupled to the rotor shaft. At least one injector may be positioned in the wall of the vessel, the at least one injector introducing a secondary flow of liquid into the vessel. The at least one injector may be located in the wall of the vessel at an injector elevation angle .sub.I that is greater than 44 degrees and less than or equal to +22 degrees relative to the shaft plane.

Disclosed herein are disc filters for dewatering a fiber suspension. According to a first aspect, the disc filter includes a vessel comprising an inlet positioned in a wall of the vessel, the inlet introducing a fiber suspension into the vessel. The disc filter further includes a rotor shaft comprising a shaft axis of rotation positioned in a shaft plane, wherein the shaft plane is a horizontal plane. At least one filter element may be coupled to the rotor shaft. At least one injector may be positioned in the wall of the vessel, the at least one injector introducing a secondary flow of liquid into the vessel. The at least one injector may be located in the wall of the vessel at an injector elevation angle .sub.I that is greater than 44 degrees and less than or equal to +22 degrees relative to the shaft plane.