A batch centrifuge having a filter screen that can be expeditiously removed and replaced and that is more rigid and more durable than filter screens that are typically employed in current practice. The batch centrifuge may include a centrifuge basket and a cylindrical filter screen disposed within the centrifuge basket, wherein the filter screen is formed of a plurality of curved panels that fit together at adjoining edges. In some embodiments, each of the curved panels may be small enough to fit through an opening in the top of the centrifuge basket without being bent or otherwise deformed.

A centrifugal filtering device includes a centrifugal drum and a rotary filter. The centrifugal drum has a receiving space for accommodating the source fluid. The rotary filter rotatably mounted in the receiving space includes a filter body and a filtrate discharge pipe. The filter body includes a filter cartridge defining a filtrate-collecting space. The filtrate discharge pipe connecting the filter body is communicative in space with the filtrate-collecting space. By rotating at least one of the centrifugal drum and the rotary filter, the source fluid is driven to generate a vortex by a centrifugal force. The centrifugal force drives the source fluid to form a heavy-phase fluid hitting the centrifugal drum and a light-phase fluid approaching the filter cartridge. The light-phase fluid passes the filter cartridge and then reaches the filtrate-collecting space as a filtrate, and the filtrate is exhausted via the filtrate discharge pipe of the centrifugal filtering device.

A centrifugal filtering device includes a centrifugal drum and a rotary filter. The centrifugal drum has a receiving space for accommodating the source fluid. The rotary filter rotatably mounted in the receiving space includes a filter body and a filtrate discharge pipe. The filter body includes a filter cartridge defining a filtrate-collecting space. The filtrate discharge pipe connecting the filter body is communicative in space with the filtrate-collecting space. By rotating at least one of the centrifugal drum and the rotary filter, the source fluid is driven to generate a vortex by a centrifugal force. The centrifugal force drives the source fluid to form a heavy-phase fluid hitting the centrifugal drum and a light-phase fluid approaching the filter cartridge. The light-phase fluid passes the filter cartridge and then reaches the filtrate-collecting space as a filtrate, and the filtrate is exhausted via the filtrate discharge pipe of the centrifugal filtering device.

A bi-directional filter includes an outer housing and a filter assembly unit. The outer housing is provided with one inlet for contaminated fluid and at least one outlet. The filter assembly unit includes at least one separation void for contaminated fluid. The filter assembly unit, at least one separation void, and the outer housing provide an outer dead end and an inner dead end within the bi-directional filter. The filter assembly unit is connected to a drive unit through a shaft.

A bi-directional filter includes an outer housing and a filter assembly unit. The outer housing is provided with one inlet for contaminated fluid and at least one outlet. The filter assembly unit includes at least one separation void for contaminated fluid. The filter assembly unit, at least one separation void, and the outer housing provide an outer dead end and an inner dead end within the bi-directional filter. The filter assembly unit is connected to a drive unit through a shaft.

A separation device for separating impurities from a fluid to be cleaned has a separation body with a collecting region for impurities. A load determination apparatus determines an impurity load state of the collecting region for impurities. The load determination apparatus has a transmitter emitting electromagnetic waves, a receiver receiving the electromagnetic waves emitted by the transmitter, and an evaluation device. Transmitter and receiver are arranged opposite each other on opposite sides of the collecting region for impurities. The separation body at least in sections is at least partially transmissive for electromagnetic waves emitted by the transmitter. Transmitter and receiver are connected to the evaluation device. The evaluation device determines the impurity load state of the collecting region for impurities based on the electromagnetic waves received by the receiver. Such a load determination apparatus as described as well as a method for determining an impurity load state are provided.

Disclosed is a centrifugal filtration apparatus including a casing, a shaft, a stand tube, a rotor, and a stereoscopic filter. The shaft is vertically installed in the casing and guides a fluid to an upper end of the casing. The stand tube rotates about the shaft and sprays the fluid to the upper end of the casing. The rotor rotates along with the stand tube and forms a space in the casing to receive and filter the fluid sprayed from the stand tube. The stereoscopic filter includes a plate member and wire members. The plate member is rolled up around the stand tube and is installed in the rotor. The wire member is installed between layers of the plate member to secure a gap between the layers of the plate member and forms a filter layer to filter the fluid that flows between the layers of the plate member.

Disclosed is a centrifugal filtration apparatus including a casing, a shaft, a stand tube, a rotor, and a stereoscopic filter. The shaft is vertically installed in the casing and guides a fluid to an upper end of the casing. The stand tube rotates about the shaft and sprays the fluid to the upper end of the casing. The rotor rotates along with the stand tube and forms a space in the casing to receive and filter the fluid sprayed from the stand tube. The stereoscopic filter includes a plate member and wire members. The plate member is rolled up around the stand tube and is installed in the rotor. The wire member is installed between layers of the plate member to secure a gap between the layers of the plate member and forms a filter layer to filter the fluid that flows between the layers of the plate member.

A centrifugal filtering device includes a centrifugal drum and a rotary filter. The centrifugal drum has a receiving space for accommodating the source fluid. The rotary filter rotatably mounted in the receiving space includes a filter body and a filtrate discharge pipe. The filter body includes a filter cartridge defining a filtrate-collecting space. The filtrate discharge pipe connecting the filter body is communicative in space with the filtrate-collecting space. By rotating at least one of the centrifugal drum and the rotary filter, the source fluid is driven to generate a vortex by a centrifugal force. The centrifugal force drives the source fluid to form a heavy-phase fluid hitting the centrifugal drum and a light-phase fluid approaching the filter cartridge. The light-phase fluid passes the filter cartridge and then reaches the filtrate-collecting space as a filtrate, and the filtrate is exhausted via the filtrate discharge pipe of the centrifugal filtering device.

A centrifugal separator for separating blow-by gases into cleaned air and liquid for recirculation through an engine.