Abstract: A dewatering system for dewatering a material includes a pressure roller dewatering apparatus that includes two dewatering rollers parallel to each other, the distance between which is freely adjustable, and at least one water-absorbent draw-in member provided on the external periphery of the dewatering roller; a water content-controlling unit for dewatering the material until the water content of the material is reduced to a liquid limit or lower and for supplying the resulting water-content-controlled dewatered material between the two dewatering rollers, the water content-controlling unit being disposed upstream of the pressure roller dewatering apparatus; and a roller recycling unit for removing adhering matter and water from the draw-in member.

Abstract: A cyclone separator includes a housing generally symmetric about its central longitudinal axis and an inlet for introduction of a fluid containing dispersed substances. An outlet for the cleaned fluid includes a tube through the bottom wall of the housing having an axis coaxial with the longitudinal axis. An outlet for the dispersed substances has the shape of an annular channel in the bottom wall disposed adjacent the tube and adjacent a rotation axis of the fluid whereat high-density substances settle.

Abstract: An assembly for separating solid phase material from a slurry that comprises a pressurized filtration unit including a vessel and filter media. A slurry is fed to the filtration unit where it is separated into a solid phase material and a liquid phase material. The filtration unit has a solid outlet for discharging the solid phase material to a material transport. The material transport moves the solid phase material to a depressurizing chamber that has a lower pressure than the filtration unit. As the solid phase material enters the depressurizing chamber it is exposed to the lower pressure of that chamber. The material transport maintains the pressure difference between the filtration unit and the chamber. Subsequently, the depressurized solid phase material can be conveyed to other equipment for drying or other processing.

Abstract: In a screw press, an outer tube (5), over which a screen (4) is tensioned, is divided into a freely rotatable condensing zone at the front half thereof, and a filtering and dewatering zone at the rear half thereof, a freely rotatable screw shaft (7) is provided within the thus-divided outer tube (5a, 5b), filtered fluid is separated from sludge supplied to the starting end of the condensing zone by the screen (4) of the outer tube (5a), and a cake is removed at a discharge port (29) at the rear end of the outer tube (5b) of the filtering and dewatering zone. A sludge supply path (28) is provided in the screw shaft (7), a supply hole (28a) of this supply path (28) is formed at the starting end of the outer tube (5a) of the condensing zone, and a scraper (33) extends on the outer periphery of a screw vane (6) from the starting end to the ending end.

Abstract: A fluid reclamation system is provided for separating large debris particles from a polluted fluid. The reclamation system includes a separation device with an endless screen installed onto driven cylinders. A basin is mounted within the screen for collecting the fluid after it passes through a top surface of the screen. A disposal mechanism discards large debris particles from the screen and discharges the large debris particles into a storage barrel.

Abstract: An improved coolant cleaning method, system, and apparatus, are provided through the use of a filter disk assembly that defines and is rotatable about an axis of rotation of the disk, for removing particulate matter from a fluid flowing through the filter disk assembly in a direction substantially parallel to the axis of rotation of the filter disk assembly. A coolant cleaning system includes such a filter disk assembly, connected in fluid communication with an apparatus for circulating a flow of fluid through the filter disk assembly in a direction substantially parallel to the axis of rotation of the filter disk assembly.

Abstract: A solid-liquid separating apparatus including a strainer of a cylindrical shape. The strainer is comprised of circular ring members arranged side by side with gaps in between and disposed inside an accommodating section the device casing. The circular ring members comprise end-part circular ring members at both ends of the strainer and a plurality of intermediate circular ring members disposed between the end-part circular ring members and have inward projections projecting from their inner circumferential surfaces. A plurality of lateral bridge members are installed between the end-part circular ring members, and these bridge members have engaging parts that engage with the respective inward projections of the intermediate circular ring members so as to hold the intermediate circular ring members.

Abstract: The invention relates to a silo for sludge, especially sewage sludge, comprising a sludge-receiving part (12), a feeding part (16), said feeding part being located above the sludge-receiving part (12) and communicating with said sludge-receiving part (12) via a inlet (14), and a sludge-discharge device. Said sludge-discharge device is located in the lower area of the sludge-receiving part, and can preferably be connected to a pipeline system. According to the invention, a separator device (18) for removing foreign bodies is located in the area of the feeding part (16) so that the sludge which is temporarily stored in the silo can easily be used later on. Said separating device for removing foreign bodies (18) has a sieve grate (20) covering the inlet (14) and at least one counter-surface (22) positioned above said sieve-grate (20). Said sieve-grate and said counter-surface are able to move in relation to each other as sludge pushes through the sieve openings of said sieve-grate.

Abstract: The invention relates to the formation of an article which is wholly formed with a thread formation or includes a portion which is threaded. The threaded portion is formed by winding a wire in a helical path around a series of spaced support members. The wire forms the thread and also forms a slot in a helical path between adjacent portions of the wound wire. A suitable threaded member can then be introduced to the article and selective rotation causes relative movement of the threaded member along the threaded portion. The article can be used as a filter medium, a securing means and the like and the wire used is typically triangular in cross section and known as wedge wire.

Abstract: Apparatus for the screening of fiber suspensions is disclosed including a housing, a reject outlet and an accept outlet, a screen located within the housing, a rotor including pulsation wings mounted therein, a reject chamber in the housing for collecting a reject portion of the fiber suspension, and an accept chamber for collecting the accept portion of the fiber suspension passing through the screen and supplying it to the accept outlet, each of the pulsation wings including an outside face and an inside face, a leading edge, a trailing edge, and upper and lower ends so that a predetermined pressure difference is created between the outside and inside faces of the pulsation wings in the direction of the lower edge thereof.

Abstract: Method and arrangement for filtering particles out of a liquid, in which the liquid containing particles is supplied to a sedimentation tank (12), and the liquid is made, by means of hydrostatic liquid pressure prevailing in the tank, to flow through a filter member (18) on the shell surface of a drum (14) mounted in the tank (12). When the liquid in the tank has risen to a predetermined level above the drum (14) as a result of clogging of the filter member (18), cleaning of the filter member (18) in situ in the tank is initiated.

Abstract: A belt press having a frame with a first belt and a second belt rotatably mounted on the frame. A curved inlet guide is movably carried on the frame. The inlet guide has a decreasing radius of curvature from an inlet end to an exit end. A positioning assembly is mounted on the frame and is attached to the inlet end of the inlet guide to raise and lower the inlet end of the inlet guide.

Abstract: An apparatus for de-watering sludge. A main shaft is rotated about a longitudinal axis at a first rate. A screw shaft coupled to the main shaft is rotated about the longitudinal axis at the first rate. Screw flighting coupled to the screw shaft is rotated about the longitudinal axis at the first rate. A first and second stage drum are rotated about the longitudinal axis at a second rate. Sludge is introduced to a first area defined by an outer surface of the screw shaft and an inner surface of the first stage drum. Moisture is removed from the sludge through a first slot coupled to the first stage drum. The sludge is transported with the screw flighting from the first area to a second area defined by an outer surface of the screw shaft and an inner surface of the second stage drum, the second area being larger than the first area. Moisture is removed from the sludge through a second slot coupled to the second stage drum.

Abstract: A fluid reclamation system is provided for separating large debris particles from a polluted fluid. The reclamation system includes a separation device with an endless screen installed onto driven cylinders. A basin is mounted within the screen for collecting the fluid after it passes through a top surface of the screen. A disposal mechanism discards large debris particles from the screen and discharges the large debris particles into a storage barrel.

Abstract: The invention is relative to a device for dehydrating sludge such as occurs in sewage treatment plants in the form of dilute sludge. The receptacle for the sludge contains a sieve surface comprising openings for the passage of liquid. The sieve surface, for its part, is substantially circular can be rotated about an axis (21) running vertically to the sieve surface. The axis (21) of the sieve surface (2) is inclined relative to a horizontal line and is caused to rotate by a drive device (3). The disk-shaped sieve surface (2) is arranged in a container (11) comprising a bottom (13) and a side wall (12) through which side wall a supply line (4) for the sludge and an outlet (41) for the separated water run.

Abstract: Device and process for separation of absorbent/floating material from product mixes by means of float/sink separation with a float/sink separator which exhibits a separator tank filled with a liquid separating medium, in which context there are provided devices for generation of a surface flow in the separating medium, which propel the absorbent/floating material as a floating fraction from a pickup point mix to an output point for the floating fraction, along the surface of the separating medium at such a speed as to inhibit absorption of the separating medium.

Abstract: A disposable rotary drum filter for processing batches of slurry. The device includes an outer housing in which is disposed a rotatable inner drum that is covered with a filter material. Preferably the device is fabricated from a plastic material that is sterilizable. The inner drum is preferably magnetically coupled to an external drive unit, eliminating seals required if it were necessary for a drive shaft to pass through the housing. The inner drum rotates through a slurry. The filtrate outlet is connected to a vacuum source that draws the slurry through the filter material. Solids in the slurry are thus deposited as a filter cake on the outer surface of the filter material, while liquid from the slurry passes through the filter material to be collected as a filtrate. Air drawn into the housing through an inlet passes through the filter material and partially dries the filter cake that has been rotated out of the slurry.

Abstract: An apparatus for collecting oil from a surface of a water body comprising a drum, the drum rotatably mounted on a vessel such that a lower portion of the drum is positioned below a waterline of the vessel, and a wiper member on the vessel, the wiper member positioned and configured to wipe oil from the drum below the surface of the water body. Wiped oil is collected below the surface of the water body through a series of collection tanks. A dryer wiper wipes water from an unsubmerged portion of the drum to improve oil uptake.

Abstract: A solid-liquid separating apparatus comprising: a strainer which is in a cylindrical shape formed by a plurality of flat ring members with gaps in between; a casing which has an accommodating section for setting the strainer therein so that the accommodating section is divided by the strainer into a strainer inner region and a strainer outer region, and an intake port that introduces a mixture of a solid and liquid is formed in the strainer outer region and an outlet port that discharges to the outside the liquid that is separated from the solid and passes between the circular ring members and advances into the strainer inner region is formed in the strainer inner region; and a scraper that has plate-form protruding portions with tip ends thereof located in the gaps between the circular ring members of the strainer so as to scrape off the solid matter adhering to the flat surface of the circular ring members.

Abstract: A solid-liquid separating apparatus including a strainer of a cylindrical shape. The strainer is comprised of circular ring members arranged side by side with gaps in between and disposed inside an accommodating section the device casing. The circular ring members comprise end-part circular ring members at both ends of the strainer and a plurality of intermediate circular ring members disposed between the end-part circular ring members and have inward projections projecting from their inner circumferential surfaces. A plurality of lateral bridge members are installed between the end-part circular ring members, and these bridge members have engaging parts that engage with the respective inward projections of the intermediate circular ring members so as to hold the intermediate circular ring members.

Abstract: A magnetic separator apparatus having a configuration of barium ceramic magnets impregnated into polypropylene bars interspersed onto a conveyor belt which passes through an aqueous solution containing unwanted magnetic particulate. A plurality of spaced-apart magnet pairs embedded in each polypropylene bar are configured to provide maximum field penetration and holding strength of the magnets. Particulate attracted to the plurality of magnet pairs are scraped from the conveyor belt into a collection drawer.

Abstract: A pressure screening apparatus for screening a stock suspension and screen clearer for a pressure screening apparatus.

Abstract: A filter incorporates a magnetic separator comprised of a series of side by side but spaced apart permanently magnetized bars interconnected to form a train, movably mounted through a tank into which is introduced liquid contaminated with ferromagnetic particles to be removed. The bar train includes a section overlying a vacuum box in the tank which also is overlain with a filter media to remove particles not removed by the separator. The bar train may be mounted to a flight conveyor included in the filter, or alternatively have its own support and drive. A scraper station is located at a discharge end of the tank for removal of accumulated particles from the bars. Scraper blocks are slidably mounted on the bars and remain there throughout the machine cycle, each of the blocks successly engaged with a plate on a band cylinder as the bars are moved into the scraping station. The cylinder is stroked to wipe the bars at the scraper station.

Abstract: A rotating brush, mounted on either the outside or the inside of a rotary intake drum, to brush debris from the surface of the drum. The debris is collected in a holding bin located under the brush. The system uses a collector to remove debris from the holding bin when it is filled. In this way, debris is removed completely from the intake, rather than merely brushing it from the drum into the water flow, where it is immediately sucked onto the drum again. The brush rotates the drum as it turns on the surface. This action flicks the debris from the drum into the holding bin. This action automatically removes debris as the drum is working. Other features of the device include a framework for placing and operating the drum and the collection system.

Abstract: A screening device useful in water and waste water treatment plants separates fluid flow into two streams. The screening device is perforated so that solids having a predetermined cross-section will be maintained within a first fluid stream, and a portion of the fluid flow that has been screened of solids will flow into a second split-off fluid flow. The streams may go to different locations; only the first stream need be processed for the solids. The screening device is preferably cylindrical or another surface of rotation or a section of such a surface, and rotates. These features help maintain the screening device free of solids, and supplemental cleaning devices may also be used.

Abstract: A strainer with a screen at its outer periphery is rotatably supported on a casing. A hollow pipe with paddles on an outer periphery of the pipe is fitted in the strainer. The hollow pipe is rotated at a rotating velocity different from that of the strainer. Slurry introduced into the hollow pipe is discharged through slurry outlets on the hollow pipe into inside of the strainer. Then, the slurry is hydrated by the screen under centrifugal action and is moved by the paddles toward a slurry outlet.

Abstract: A sludge filtration apparatus having chain type belt press with fine fibers of synthetic resin joined thereon wherein a pressing belt (50) for pressing the sludge on and with the filtering belt makes the sludge into the sludge cake, said filtering belt includes a chain (20) being engaged with plural of sprockets of the rollers (40,41,42, 43) and a water absorbing and filtering portion (34) fixed on the chain (20), and wherein said absorbing and filtering portion (34) includes filtering units (33) and elongate grooves (12) for coupling detachably with the filtering units (33).

Abstract: A separator includes a continuous inclined screening belt that passes over an upper roller and a lower roller to screen debris from municipal wastewater. The debris is then conveyed to a debris discharge outlet. A puddle of debris-laden wastewater forms a hydrostatic pressure head on the upper surface of the screening belt to assist in forcing the wastewater through the screening belt. Wastewater that passes through apertures in the screening belt is deflected by a deflector plate that shields the return path of the screening belt. The screened wastewater is then directed to the wastewater outlet. In a preferred embodiment, a belt-cleaning brush is disposed along the return path and brushes clinging debris from the screening belt toward the debris discharge outlet. Additionally, the screening belt rides on and is supported by a perforated backing plate as it travels from the lower roller to the upper roller.

Abstract: The invention relates to a filtering apparatus for removing matter and bodies accompanying a liquid flow. The filtering apparatus includes a number of individual filter elements disposed to be displaced in an endless path. The endless path is formed by one or more arcs in relation to which the filter elements are displaceable. A drive is provided for displacing one filter element at a time past a scraper device for removal of matter accumulated against the filter element.

Abstract: An apparatus for de-watering sludge. A main shaft is rotated about a longitudinal axis at a first rate. A screw shaft coupled to the main shaft is rotated about the longitudinal axis at the first rate. Screw flighting coupled to the screw shaft is rotated about the longitudinal axis at the first rate. A first and second stage drum are rotated about the longitudinal axis at a second rate. Sludge is introduced to a first area defined by an outer surface of the screw shaft and an inner surface of the first stage drum. Moisture is removed from the sludge through a first slot coupled to the first stage drum. The sludge is transported with the screw flighting from the first area to a second area defined by an outer surface of the screw shaft and an inner surface of the second stage drum, the second area being larger than the first area. Moisture is removed from the sludge through a second slot coupled to the second stage drum.

Abstract: A filter cloth comprising at least a base layer and a filtering layer, characterized in that the ratio T/L of the thickness (T) of the filtering layer to the length (L) of fibers of fiber bundles constituting the filtering layer is 0.02 to 0.7 and the sum of a projected area of the fibers onto the base layer surface is 8 to 350 times the area of the base layer surface and, a filter cloth characterized in being constituted with at least a base layer and a filtering layer mainly composed of fiber bundles of crimped fiber ratio over 5%.

Abstract: A filter unit for filtering pressurized liquid carrying solid contaminants, comprising a housing having a cavity, an unfiltered liquid inlet port, and a filtered liquid outlet port. The filter unit also has a filter element having a generally cylindrical shape positioned within the housing, an interior, and a porous filter sleeve having an exterior face, the interior of said filter element in fluid communication with the filtered liquid outlet port and the exterior face of the sleeve of said filter element in fluid communication with the unfiltered liquid, so that, in operation, unfiltered liquid carrying solid contaminants flows into the cavity of the housing through the unfiltered liquid inlet port, the filter element filters the solid contaminants from the liquid, and the filtered liquid passes through the sleeve of the filter element to the interior thereof before exiting the filter unit via the filtered liquid outlet port.

Abstract: The invention relates to a method and a device for clearing product, e.g., sugar, from the inside of a centrifuge basket of a discontinues centrifuge. A scraper blade, which is attached to a clearing rod, is pivoted toward the spun-off layer of product. The scraper blade scrapes off the product with a cutting edge, which is directed in a direction that is opposite to the direction of rotation of the basket. To optimize the product removal, it is preferable if the scraper blade, after it has been pivoted inward, contacts the product over virtually the entire height of the basket and at the same time scrapes off the product from the layer of product which is rotating at the clearing rotational speed in layers over the entire height of the basket. Once the product has been substantially completely removed from the basket, the scraper blade is pivoted back away from the basket wall.

Abstract: A waste-water filtration device for fish cultivation comprises a thin rotatable filter material through which waste water flows from the inside surface to the outside surface, a removing means which comprises a brush on either of the inside or outside surfaces for relatively scraping the inside and outside surfaces of said rotatable filter material, and a drive assembly which comprises a power supply means and a bearing means to drive the rotatable filter material whereby the rotatable filter is cleaned by removing the waste matter which adheres to said filter material.

Abstract: A gravity liquid filtration apparatus includes a housing with a pool forming assembly mounted between a pair of side walls in the housing. The pool forming assembly includes a central shaft with a pair of spaced-apart discs rotatably mounted on the shaft between the side walls. A filter media is supported on an endless loop carrier belt, and pressed against the peripheral edges of the containment discs along bottom arcs thereof to form a generally semi-cylindrical shaped pool. A liquid inflow assembly on the housing includes a delivery head with a nozzle portion having an elongated mouth aimed downwardly to discharge liquid onto a downwardly sloped portion of the filter media. A box is formed in the delivery head above the nozzle of a size to permit large objects such as pens and pencils to fall flat and be discharged through the mouth of the nozzle.

Abstract: A magnetic separator apparatus having a configuration of barium ceramic magnets impregnated into polypropylene bars interspersed onto a conveyor belt which passes through an aqueous solution containing unwanted magnetic particulate. A plurality of spaced-apart magnet pairs embedded in each polypropylene bar are configured to provide maximum field penetration and holding strength of the magnets. Particulate attracted to the plurality of magnet pairs are scraped from the conveyor belt into a collection drawer.

Abstract: A uniform area shower for use with a disc filter. The disc filter includes at least one disc and moving showers that periodically remove a precoat layer of solids from the surface of the disc. In one embodiment the uniform area shower comprises a oscillating shower that is pivotly mounted and travels radially over the disc. In an alternative embodiment the uniform area shower comprises a traversing shower that mounts to a carriage and travels radially over the disc. Each shower includes a controller controlling the drive mechanism to vary the speed of transport of the shower across the surface of the disc such that time spent by the shower cleaning the disc at each radial cleaning position is generally proportional to the radial distance of the cleaning position from the center of the disc so that a wash liquid is applied to a uniform area of the interior and exterior of the disc.

Abstract: The present invention relates to a device and a process for thickening and conveying waste water sludges, especially with a centrifuge. Here, the centrifuge has at least one lysis device for the breaking down of cells of organisms contained in the waste water sludges. The lysis device of the device of the invention may take the form, for example, of a friction grinder (100; 200) with grinding discs (161, 162) or a milling cone, a shaped rasp, a roller crusher, a passing drum, a cutting unit with rows of rotary cutters or a pin grinder with rows of rotating pins. The device of the invention is capable of the lysis of cells, especially those of bacteria and protozoons so that their cell content discharges into the surrounding medium which then acts as a simulation reagent for the bacteria still present in the sludge, so that on the one hand the total quantity of sludge can be greatly reduced and on the other the bio-gas yield is considerably increased.

Abstract: The present invention pertains to a system for transferring sludge. The system comprises a gravity deck machine having a belt which transports sludge and a first plow and at least a second plow disposed adjacent to the belt for dispersing sludge transported by the belt. The system is also comprised of a mechanism for moving the first plow and at least the second plow simultaneously from a first desired position to a second desired position. The present invention pertains to a method for transferring sludge. The method comprises the steps of placing the sludge on a belt of a gravity deck machine. Next there is the step of moving the sludge with the belt in a first direction so sludge is moved past a first plow and at least a second plow disposed at a first level in the sludge and dispersed by the first and second plows as the sludge moves past the plows. The second plow is positioned downstream of the first plow in regard to the sludge.

Abstract: A clearing device for a centrifugal separator holds a cake on a filtering medium lining at least the perforated part of a rotating basket. The clearing device includes several clearing members which, when arranged at rest, are more or less parallel to the generatrices of the perforated wall of the basket and between this wall and the filter medium, are spaced angularly, each clearing member resting, via one of its ends, on one wall of the basket and being equipped, at the other end, with a control means capable of receiving a longitudinal compressive force which, by deforming the clearing members causes the formation of at least one convex projection which locally deforms the filtering medium. The clearing device also includes actuating means capable of coming into contact with the control means of each clearing member to shift it in the direction for forming the projection.

Abstract: An apparatus for extracting liquids from a slurry formed of liquids and fibers, like diluted manure or paper mills residue. The apparatus has a rotatable drum covered with a resilient layer. The apparatus also has two draining rolls which are pressed against the drum so that the slurry passing in between is squeezed. Each roll has a hollow cylindrical shell with a uniform distribution of openings. Each roll also has a perforated filter screen fixed to is. The screen has perforations evenly distributed so that only some perforations lie over the openings in the shell. The perforations are smaller in size than the openings. The apparatus also has a pair of wipers in order to wipe the fibers out of the draining rolls and guide the liquids collected in the shells towards a liquids outlet. A reservoir can be mounted above the drum and upper draining roll for receiving the slurry, storing it to build-up a constant pressure, and supplying it in a continuous manner.

Abstract: A screening device is described which is adapted in particular for fiber suspensions when paper is pulped. Along the outer circumference of a rotor body, there are disposed vanes which are oriented towards a screen wall. The vane is supported by a support member made of several parts, e.g. two parts, namely of a vane carrier and a strut carrier. The strut carrier is secured to the rotor body, for example by welding. The vane carrier and the strut carrier are detachably connected with each other by a screw connection which prevents rotation therebetween. More particularly, the connection between the vane carrier and the strut carrier is of the interlocking type.

Abstract: An apparatus for processing a solid-liquid material comprises a housing formed with a series of interconnected chambers defined by chamber walls with at least two drums mounted in series within the chambers. Each chamber receives one of the at least two drums for rotatable movement therein. Each chamber and the associated drum are dimensioned to define a region therebetween to retain the solid-liquid material. The regions of adjacent chambers communicate with each other to define a continuous passage from drum to drum through the apparatus. An inlet in the housing admits the solid-liquid material to the passage, and an outlet permits extraction of a processed solid-liquid material from the passage. Each drum rotates in a direction opposite to the adjacent drum to advance the solid-liquid material through the passage from drum to adjacent drum in a sinuous path such that the curvature of the solid-liquid material changes when passing from drum to adjacent drum.

Abstract: A diaphragm-type control valve for irrigation systems has an outer clam-shell housing that encloses a vertically reciprocable diaphragm assembly. A primary valve seat inside the housing is engaged and disengaged by a seal on the underside of the diaphragm to open and close the valve by connecting and disconnecting its inlet and outlet passages. Pressurized water from a lower inlet chamber of the valve travels through a small metering orifice in the center of the diaphragm assembly to an upper pressure control chamber above a flexible membrane of the diaphragm assembly. A solenoid actuated pilot valve is operatively coupled to the upper pressure control chamber for venting pressurized water therefrom to permit the diaphragm assembly to move upwardly to open the valve. A filter screen is mounted to the underside of the diaphragm assembly to prevent debris from clogging the metering orifice, clogging the small passages of the pilot valve, or fouling the solenoid.

Abstract: A filtering apparatus and filtering system where a hinge belt 10 of a hinge-belt type filtering apparatus 100 is continuously rotated by driving of a drive motor 65 such that hinge scrapers are rotated along a bottom plate 6b of the hinge filtering apparatus main body, from a horizontal part to a slope part of the hinge filtering apparatus main body.

Abstract: The invention provides a cleaning method for removing dirt on an industrial belt and a cleaning belt used in the same. A cleaning belt having through-holes is provided onto an industrial belt. The cleaning belt comprises structural unit pieces in parallel to one another in a lengthwise direction. Each of the unit pieces is loosely interconnected and has a play such that the unit piece can move. The movement gives vibration onto the industrial belt when the cleaning belt is brought in contact with the surface of a running industrial belt. Then dirt on the industrial belt is removed through the through-holes.

Abstract: A gumbo separator has a continuous, inclined, moving screen belt which rides on and is supported by a perforated backing plate. The desirable portion of drilling fluids fed to the gumbo separator passes through the screen belt and backing plate and may be further processed to remove drill cuttings. The gumbo, containing gummy hydrated clays, are conveyed off the screen belt to the reserve pit. The gumbo separator provides a self cleaning screen belt, using a counter-rotating belt cleaning brush. A spray bar back-washes the screen belt with high pressure drilling mud to remove any gumbo lodged in the screen belt openings.

Abstract: Apparatus is disclosed for dewatering pulp suspensions including a pair of cylindrical rotatable liquid-premeable press rolls forming a nip therebetween, so that the material suspension can pass between the nip to be dewatered and to form a material web, a pair of doctor blades disposed below the nip, each associated with one of the press rolls for removing the material web therefrom, and a sealed casing enclosing at least the upper portion of the pair of press rolls, the sealed casing including an inlet for the material suspension, and the pair of doctor blades being coupled together so that they are movable relative to the nip in order to alter the distance between the pair of doctor blades and the nip when the size of the nip is adjusted.

Abstract: A method and apparatus thickens lime mud with a disc filter in such a way that the precoat layer on the filter surfaces of the disc filter can be cleaned. Beneath the scrapers for scraping a dry layer of lime sludge from the precoat layers on the disc filter wires surfaces one or more high pressure nozzles, and optionally a low pressure nozzle, are provided for directing jets of liquid at the precoat layer and wire surface. One high pressure nozzle may remove the precoat layer while another cleans the wire surface, and the nozzles may be reciprocated (with respect to the shaft for rotating the disc filters in a trough). The high pressure jets provide liquid at a pressure of about 30-100 bar, while the low pressure jet pressure is between 2-30 bar and may be utilized continuously, or arrested when the high pressure jets are operable.

Abstract: A method and apparatus for fibrous suspensions in the wood processing industry and more specifically to a so-called drum cylinder, the basic construction of which comprises a vessel, into which suspension being thickened is supplied and a wire-surface cylinder rotating in the vessel. The drum filter is characterized in that the closure member of the drum filter has a channel for leading gas from the filtrate tubes through the compartments of the distribution chamber to the outside of the closing member. The method is characterized in that the operation phase of the filter cylinder is divided into five separate stages. In the first stage, when the cylinder descends on to the vessel, air and the initial filtrate are discharged from the filtrate components and the formation of the pulp web on the wire surface begins. In the second stage, filtrate is discharged with vacuum and the formation of the pulp web continues.