Abstract: Waste that contains fibres and combustible material is slushed in a continuous-operation high-consistency pulper (10) to suspend in water the fibres contained in the waste. From the pulper (10) are discharged substantially continuously a fibre suspension (P1) through a screen plate; and non-defibrable material (R1) by means of a mechanical transfer device (22). The fibre suspension (P1) is sorted and cleaned for use as raw material in paper or board. The non-defibrable material (R1) and the rejects (R2-R4) separated from the fibre suspension (P1) in the sorting and cleaning stages are used as fuel in energy production and/or utilized as raw material.

Abstract: A pressure differential material transport system to transfer materials with an airflow to a sewer system. Embodiments of the pressure differential material transport system may be used for residential or industrial applications to dispose of materials to the sewer or to a comminutor to reduce the size of materials prior to disposal.

Abstract: A vertical mixer has a set of wheels on each side of the mixer that is automatically adjustable for variation in the terrain where the mixer is used. Each set is rotatable about a pivot point. Preferably, weight bars provide the pivot point for each set of wheels. There is a further weight bar in the tongue of the mixer. The weight bars automatically determine the weight of materials within the mixer on an intermittent or continuous basis.

Abstract: In a waste pulping apparatus, an impeller assembly comprises a rotating blade for pulping solid waste to form a slurry, the rotating blade having an axis of rotation, a base and a plurality of ears that axially extend away from the base. The impeller assembly also includes a sieve ring having axially opposed first and second ends, an inner cylindrical surface and an outer cylindrical surface, where the sieve ring encircles the base of the rotating blade at the first end so that a portion of the ears are radially spaced inside the inner cylindrical surface so that the ears rotate within the sieve ring. A plurality of pumping vanes are also provided for pumping the slurry, where each pumping vane has a pumping surface that rotates radially outside the outer cylindrical surface of the sieve ring. Preferably, the pumping vanes can be easily changed to allow for various head condition while providing a predetermined pumping capacity.

Abstract: An apparatus for the continuously recycling of synthetic plastics material, preferably polyester, has a first receptacle (2) for the material in which movable tools (9) are disposed which comminute and/or mix the material. Pre-processed material is conveyed from this receptacle (2) through a vacuum-tightly closable conduit (18) into a second receptacle (19), the interior of which can be evacuated. Within this second receptacle (19) are movable tools (22) for processing the material. The material is conveyed from the second receptacle (19) by means of a screw (30). Another screw (15) is bearingly supported within the channel (18) and the screw volutions of this screw convey the material from the first receptacle (2) into the second receptacle (19). Between the screw volutions (52) of this further screw (15) and the second receptacle (19) there is at least one damming element (39) in the channel (18), which is disposed in the flow of the conveyed material.

Abstract: An agitator mill comprises a grinding container with a rotatably drivable agitator disposed therein. Provision is made for a grinding-stock feed pipe with a grinding-stock feed pump and a grinding-stock discharge pipe with a grinding-stock discharge pump. At least one of the pumps is controllable.

Abstract: There is a method for which a sewage sludge is permitted to flow from a first connecting region 21 to a treatment device, which works with rotation and stresses the sewage sludge with severing parts, and from the treatment device to a second connecting region 1. It is desirable to improve the continuity to the operation and to attain a decisive increase in the disintegration. This is achieved by using a rapidly rotating pipe-head formation, which has a head 6 with radial openings 10 and radial wings 4, for the mechanical disintegration of biogenic sewage sludge. The edges of the openings exert a shear effect, while the wings exert an impact effect and the combination of these two actions, in conjunction with the rapid rotation, brings about the improvement in the disintegration.

Abstract: A pulper for pulping a fiber source includes a tank and a rotor. The tank has a plurality of annular-shaped inner walls defining a chamber. The plurality of walls include a first wall, second wall, third wall and forth wall which are sequentially vertically adjoining relative to each other. Each of the walls are disposed at an angle relative to a vertical reference. The first wall is disposed at an angle of between 45 and 70° relative to the vertical reference. The second wall is disposed at an angle of between 20 and 45° relative to the vertical reference. The third wall is disposed generally parallel to the vertical reference. The forth wall is disposed at an angle of between 10 and 30° relative to the vertical reference. The tank further includes two baffles within the chamber which inhibit rotational movement of the fiber source within the chamber.

Abstract: A screen apparatus includes a casing, a material supply path for supplying a paper-making material into the casing, a plurality of screens disposed in the casing, and a plurality of agitating members provided to the respective screens. The casing is divided into an inflow side of the paper-making material communicating with the material supply path and an outflow side of the cleaned papermaking material. The screen apparatus further includes a papermaking material discharge path for discharging the paper-making material passing through the plural screens and provided on the outflow side, and a foreign material discharge path for discharging foreign material which does not pass through the screens and provided at the inflow side. The screen apparatus can be made compact.

Abstract: A system for recovering paper fiber from paper furnish material including at least one conveyor, a debaler, a weighbelt conveyor, a pulper and a double drum screen washer.

Abstract: A pulper for pulping a fiber source includes a tank and a rotor. The tank has a plurality of annular-shaped inner walls defining a chamber. The plurality of walls include a first wall, second wall, third wall and forth wall which are sequentially vertically adjoining relative to each other. Each of the walls are disposed at an angle relative to a vertical reference. The first wall is disposed at an angle of between 45 and 70° relative to the vertical reference. The second wall is disposed at an angle of between 20 and 45° relative to the vertical reference. The third wall is disposed generally parallel to the vertical reference. The forth wall is disposed at an angle of between 10 and 30° relative to the vertical reference. The tank further includes two baffles within the chamber which inhibit rotational movement of the fiber source within the chamber.

Abstract: A pulper in a stock preparation system includes a housing with a fiber inlet, at least one water inlet, at least one outlet and an inner chamber. A plurality of rotatable augers extend into the inner chamber.

Abstract: Apparatus and system to mechanically lyse microbial cells and disintegrate particulate in liquid and recycling the lysed cells, cytoplasm and particulates to the aeration system of a wastewater treatment plant. The method of lysis is cavitation and impingement in a mill, which preferably has a plurality of stages, each with a rotor/stator set. A corresponding plurality of dividers within the mill channel the fluid sequentially through each of the plurality of stages. Orifice plates may be utilized to maximize cavitation by controlling flow into the rotors, which preferably have tapering slots to maximize cavitation.

Abstract: A pulper includes a rotor (5) mounted in a tube adjacent to a screening plate (4) having holes (4a). The rotor (5) includes helical vanes (5a) whose diameter decreases towards the outer end of the rotor. The rotor vanes (5a) carry in the vicinity of the screening plate a radially and outwardly projecting shoulder-like element (10) having a leading surface (10b) which is generally flat and inclined relative to the screening plate (4) at an angle of 55°-85°, and a trailing part having a reversed wing-profile shape as seen in the direction of rotation. The element forms a pressure-generating and subpressure-generating device which exerts an alternating effect on the pulp as the rotor rotates, therewith counteracting clogging of the holes (4a) in the screening plate. The shoulder-like element (10) may comprise a completely or partially separate element in relation to the rotor, and may be detachable therefrom and replaceable, and also optionally reversible.

Abstract: A process is disclosed for disaggregating waste materials which contain at least partially reusable elements, mainly metals, plastics and cardboard. The waste materials are stirred in water by mechanical forces, large pieces, in particular plastic pieces, are coarsely crushed and soluble elements, in particular cardboard, are dissolved. The metallic elements are separated from the suspension as heavy materials, the remaining coarse solids, in particular plastics, are mechanically separated from the suspension, and the suspended fine solids are separated from the suspension by dewatering.

Abstract: The comminution and distribution device according to the invention can be used to crush comminutable, pumpable materials, in particular mechanically dewatered slurry, into roughly the same sized pieces, and feed them in controllable quantities to a downstream device, e.g., a dryer. To this end, the slurry is conveyed through a gap formed by two oppositely rotatable parts. In preferred embodiments of the device according to the invention, both parts exhibit recesses on the side facing the gap, which are designed in such a way that, when the two parts are turned opposite each other in the preset rotational direction, slurry strands with periodically alternating areas with smaller and larger cross sections are formed, transported outside and split at locations exhibiting smaller cross sections.

Abstract: Screening apparatus is disclosed for separating fiber suspensions including a housing having an inlet for the fiber suspension, a stationary tubular screen having an inlet end adjacent to the housing inlet and an outlet end, and dividing the interior of the housing into a central chamber for receiving the fiber suspension from the inlet, and an outer accept chamber for receiving an accept fraction of the fiber suspension, a rotor journalled on the housing for rotation within the central chamber coaxially with the stationary tubular screen, a reject passage for receiving a reject portion of the fiber suspension at the outlet end of the stationary tubular screen, and an annular reject passage which has a radial width and a cross-sectional area at the outlet end of the stationary tubular screen for discharging the reject portion of the fiber suspension from the central chamber to the reject passage, the annular reject passage including an annular flange attached to the inner wall of the passage, resilient tubing