摘要:
Methods for mixing a treatment agent with a pulp suspension are disclosed including supplying the pulp suspension to a mixing chamber, moving the pulp suspension through a mixing zone with the mixing chamber, supplying the treatment agent to the moving pulp suspension across the entire width of the mixing chamber prior to the mixing zone, and in which the height of the mixing zone is sufficiently small such that the pulp suspension and the treatment agent are subjected to kneading within the mixing zone in order to repeatedly stretch and compress fiber flocks in the pulp suspension. Apparatus for mixing the treatment agent with the pulp suspension are also disclosed.
摘要:
A pressure screen for separating a liquid mixture is disclosed, comprising a screen housing forming a cylindrical screen chamber, and an inlet housing directly connected to the screen housing and forming a cylindrical inlet chamber, the diameter of which is less than the diameter of the screen chamber. An inlet member is positioned on the inlet chamber for supplying a suspension to be separated substantially tangentially into the inlet chamber and an outlet member is positioned on the inlet chamber for discharging coarse contaminants from the inlet chamber, whereby the scrap particles are prevented from entering the screen chamber.
摘要:
Methods for oxygen delignification of chemical pulps are disclosed including contacting the chemical pulp with oxygen first in an upstream reactor vessel and then in a downstream reactor vessel. The upstream reactor vessel is maintained at pressures of greater than about 3 bar, and the downstream reactor vessel is maintained at temperatures of between about 90 and 120° C. and corresponding predetermined pressures. Heating of the partially delignified chemical pulp between the upstream and downstream reactors is accomplished by contacting the partially delignified chemical pulp with low pressure steam.
摘要:
Containers for collecting and discharging particulate lignocellulosic material are disclosed, including a cylindrical upper portion, a lower portion tapering towards a bottom elongated space, an exit pipe below the bottom, a pair of parallel screws mounted on parallel shafts in the elongated space in a common horizontal plane for feeding the particulate lignocellulosic material towards the exit pipe, a pair of distributors disposed on the parallel screws above the exit pipe comprising radial discs, and a pump below the exit pipe for transporting the particulate lignocellulosic material to a subsequent step.
摘要:
Apparatus for screening pulp suspensions is provided, including a housing, a rotary screen within the housing, a screen chamber between the rotary screen and the housing, a reject outlet, an accept outlet, an outer screen surface defining the outer surface of the screen chamber, a bottom screen surface defining the lower surface of the screen chamber, a slot ring at the bottom screen surface and adjacent to a knob ring at the lower end of the rotary screen, and an adjustment screw for adjusting the size of the gap between the knob ring and the slot ring from outside of the housing.
摘要:
Methods and apparatus are disclosed for degassing gas-containing fluid media in a container with the apparatus including a centrifugal pump for pumping the gas-containing fluid medium from the container, an ejector including a suction side, an ejector inlet for a drive fluid, and an ejector outlet for the drive fluid, whereby at least a portion of the pump fluid medium is fed to the suction side of the ejector for removing the gas therefrom, a diversion conduit for diverting a separate portion of the pump fluid medium from the centrifugal pump to the ejector inlet, and a return conduit for returning the separate portion of the fluid medium from the ejector outlet to the container.
摘要:
Apparatus for separating a fiber suspension is provided including a housing with an upper chamber in the upper portion thereof, a rotor rotatably mounted in the housing, a first rotary screen mounted for rotation with the rotor and dividing the housing into a first screen chamber and a first accept chamber, a second screen radially outward from the rotor defining a second screen chamber, the diameter of the first rotary screen being less than that of the second screen, the first rotary screen being located within the second screen, an inlet, a reject outlet, at least one accept outlet and a stator within the first rotary screen including at least one pulse member for creating a pulse within the first rotary screen, the diameter of the housing being less than the diameter of the second screen and the first rotary screen being separated from the second screen chamber and located at least partially within the second screen chamber.
摘要:
Apparatus for sealing rotary shafts supported by bearings within an airtight casing and extending into a housing maintained at an overpressure is disclosed including a mechanical shaft seal for sealing the shaft as it passes into the housing, a seal mount mounted on the casing for mounting the mechanical shaft seal, the casing including an opening to provide access to the mechanical shaft seal within the casing, and a removable airtight cover for sealing the opening in the casing during operation of the apparatus.
摘要:
Mixing devices for mixing a processing agent with a pulp suspension are disclosed including a mixing vessel, an agitator mounted on the surface of the mixing vessel to create a flow of the pulp suspension across the mixing vessel, a processing agent supply for supplying processing agent to the flow of pulp suspension, and a flow divider mounted on the inner surface of the mixing vessel opposite the agitator, in which the flow divider includes a substantially vertical front distribution edge and a pair of arcuate front surfaces extending from that edge to the inner surface of the mixing vessel on opposite sides thereof.
摘要:
Apparatus for treating an aqueous medium with a treatment fluid including a housing forming a treatment chamber, a rotatable rotor arranged in the treatment chamber, and including a number of rotor rings carried by the rotatable rotor and coaxially arranged at the periphery of the rotatable rotor, a number of stationary stator rings coaxially inserted between the rotor rings thus forming a number of annular axial treatment slots which have a radial size between the rotor rings and the stationary stator rings, the radial size of these slots increasing with increasing distance from the axis of the rotatable rotor, an inlet for delivering the working medium and the treatment fluid to one side of the annular axial treatment slots and an outlet for the treated working media disposed at the other side of the annular axial treatment slots, whereby the working medium is sheared in the treatment slots during operation so that substantially homogeneous shearing velocities are achieved in each of these slots.