A pulp screening machine has screen extending upward from the bottom of the pulp screening machine and a rotor which rotates around the outside of the screen. An accept outlet is provided inside the screen and a pulp outlet and reject outlet are provided outside of the screen. The rotor vanes of the rotor are cantilevered from the rotor base on top of the screen into the region of the screen, with the rotor vanes not being connected to each other in the region of the screen. The rotor vanes have a rigidity adaptable for de-flaking cooperatively with the outside surface of the screen.

A screen machine for resolving a raw material concentration phenomenon occurring in the screen machine, a casing body for the screen machine, and a screen basket. A diluent supplied through an external pipe enters a casing diluent pocket of a casing body. The diluent then enters a diluent supply path by passing through a diluent entrance of the screen basket through one or more casing diluent supply paths located in a casing upper flange and flows into a diluent pocket through a diluent exit of the screen basket by passing through the diluent supply path. The flowing diluent is sprayed onto a concentrated raw material through one or more open diluent spray holes formed on a spray surface of the diluent pocket. Since the concentrated raw material is diluted, the concentrated raw material can be lowered to a desired concentration, and problems of conventional screen machines can be resolved.

A system for monitoring the state of a screen basket of a screen for treating a fibrous suspension includes a cable-free identification unit assigned to the screen basket and disposed in a housing of the screen. An external, in particular mobile, reading unit is provided for the non-contact reading of technical data relating to the screen basket from the identification unit and for producing a connection to a further external database containing data relating to the screen.

A screen machine for resolving a raw material concentration phenomenon occurring in the screen machine, a casing body for the screen machine, and a screen basket. A diluent supplied through an external pipe enters a casing diluent pocket of a casing body. The diluent then enters a diluent supply path by passing through a diluent entrance of the screen basket through one or more casing diluent supply paths located in a casing upper flange and flows into a diluent pocket through a diluent exit of the screen basket by passing through the diluent supply path. The flowing diluent is sprayed onto a concentrated raw material through one or more open diluent spray holes formed on a spray surface of the diluent pocket. Since the concentrated raw material is diluted, the concentrated raw material can be lowered to a desired concentration, and problems of conventional screen machines can be resolved.

A system for monitoring the state of a screen basket of a screen for treating a fibrous suspension includes a cable-free identification unit assigned to the screen basket and disposed in a housing of the screen. An external, in particular mobile, reading unit is provided for the non-contact reading of technical data relating to the screen basket from the identification unit and for producing a connection to a further external database containing data relating to the screen.

A method for monitoring a wear structure including at least one wear element in a machine for generating or processing a fibrous material web, includes providing a time at which the wear element became operational, providing a time at which a defined first wear level of the wear element was reached, providing at least one further characteristic variable, and predicting a remaining operating time of the wear element from the knowledge of the times, in particular from a time difference between the times, as well as from the at least one further characteristic variable, by using a computer system. A device for carrying out the method is also provided.

A device including a hollow body defining axially extending compartments therein for receiving a slurry of pulp fibers in a carrying flow. The device includes a stationary screen within the hollow body defining a slurry compartment on one side of the screen, and a screened compartment on the other side of the screen. The hollow body also includes a slurry inlet into the slurry compartment, an elutriation suction outlet in communication with the slurry inlet, and elutriation nozzles into the slurry compartment. The device also includes an elutriation pump outside of the hollow body, the elutriation suction outlet being in fluid communication the elutriation pump, and the elutriation pump being in fluid communication with the elutriation nozzles.

A method for monitoring a wear structure including at least one wear element in a machine for generating or processing a fibrous material web, includes providing a time at which the wear element became operational, providing a time at which a defined first wear level of the wear element was reached, providing at least one further characteristic variable, and predicting a remaining operating time of the wear element from the knowledge of the times, in particular from a time difference between the times, as well as from the at least one further characteristic variable, by using a computer system. A device for carrying out the method is also provided.

A device including a hollow body defining axially extending compartments therein for receiving a slurry of pulp fibers in a carrying flow. The device includes a stationary screen within the hollow body defining a slurry compartment on one side of the screen, and a screened compartment on the other side of the screen. The hollow body also includes a slurry inlet into the slurry compartment, an elutriation suction outlet in communication with the slurry inlet, and elutriation nozzles into the slurry compartment. The device also includes an elutriation pump outside of the hollow body, the elutriation suction outlet being in fluid communication the elutriation pump, and the elutriation pump being being in fluid communication with the elutriation nozzles.

A pressure screen for cleaning a fibrous stock including a screen element which has a rotationally symmetrical configuration about a screen axis. The screen element divides the pressure screen into an inlet chamber and an accepted stock chamber. The inlet chamber is connected at a first axial end with a suspension inlet and at a second axial end with a reject outlet. The accepted stock chamber is connected with an accepted stock outlet. The pressure screen also includes a rotor situated in the inlet chamber and including a plurality of rotor blades. The rotor rotates about the rotational axis relative to the screen element. The plurality of rotor blades is arranged on a plurality of circumferential planes of the rotor. The width of an annular gap between the rotor and the screen element decreases from the suspension inlet to the reject outlet.