Meri Environmental Solutions Gmbh

Meri Entsorgungstechnik Fur Die Papierindustrie Gmbh

Meri Entsorgungstechnik Fuer Die Papierindustrie Gmbh

Voith Patent Gmbh

Meri Entsorgungstenchnik Fur Die Papierindustrie Gmbh

Meri Entsorgungstechnik F&uuml;r Die Papierindustrie Gmbh

Lucas Menke

George Troubounis

Brad Leitner

Henning Laubrock

Bernhard Niemczyk

Bob Knoll

Carl Theunis

Dieter Efinger

Luis Domene Figuerola

Klaus Englisch

Gisbert Wünsche

Falk Albrecht

Gisbert W&uuml;nsche

Robert Heinz

Philipp Kückmann

Werner Gessler

The present invention relates to a method and to a device for continuous cleaning of process water circulating in a device for treating waste paper. The process water is supplied, from a unit of the device, to an anaerobic reactor comprising a gas separator, and the cleaned process water is returned back to a unit of the device, wherein this unit is selected from: a pulper; screening device; dewatering unit; oxidation/reduction unit; centrifugal screening device; fine screening device; paper-machine mould section; paper-machine press section; reject treatment unit; fibre recovery unit; and drying section; wherein the content of inorganic solids in the reactor is measured and, if this content exceeds a pre-set limit value, process water from the reactor is continuously fed to a solid-liquid separator for separation into a fraction that is depleted of inorganic solids and a fraction that is enriched with inorganic solids, wherein the fraction that is depleted of inorganic solids is returned to the anaerobic reactor and the fraction that is enriched with inorganic solids is conveyed away out of the device, until the content of inorganic solids in the process water is less than the limit value.

Method for continuous cleaning of process water in waste paper treatment with control of the content of inorganic solids

A method for producing an object, wherein the method comprises drying the object or a primary product thereof, the object or a primary product thereof being at least partially dried in at least one drying device, wherein at least one of the at least one drying units contains at least one infrared radiator which is at least partially heated by means of biogas, a combustion gas selected from the group consisting of oxygen, air or other oxygen-containing gases is added to the biogas before said biogas is supplied to the at least one infrared radiator in order to heat said at least one infrared radiator, and the oxygen content in the waste gas resulting from the at least one infrared radiator being heated by means of the biogas is measured by means of a measuring device and the amount of combustion gas added to the biogas.

Method and apparatus for drying preferably a moving material web by means of at least one drying device heated by means of biogas and comprising infrared radiators

The invention relates to a conveyor system for conveying at least one material to be conveyed, comprising a continuously circulating conveyor, at least one transponder, preferably an RFID transponder, arranged on or in the conveyor, and at least one communication device for wirelessly transmitting data to the transponder and/or for wirelessly reading data saved in the transponder, said conveyor being a pocket conveyor belt. The conveyor preferably comprises a plurality of transponders arranged at regular intervals, wherein the data transmitted to the individual transponders or the data saved in the individual transponders preferably relates to information about a defined section of the conveyor, such as information relating to the type and/or amount of the material to be conveyed in a section of the conveyor assigned to the respective transponder.

Conveyor system for conveying material to be conveyed

The invention relates to a device for processing composite materials containing fibers, in particular packaging materials containing fibers and in particular used beverage packagings. Said device comprises a double container, which comprises: an inner drum-like container having a hollow cylindrical drum body, which is closed by means of an end bottom at one of two end faces of the drum body and is open at an opposite end face of the drum body, wherein the drum body has screen holes at least on a section of the circumferential surface of the drum body, and wherein at least one baffle is provided at least on a section of the circumferential surface of the drum body and/or on the end bottom, and an outer container, which at least partially surrounds the drum body of the inner, drum-like container, such that an intermediate space is formed between the outer surface of the inner, drum-like container and the inner surface of the outer container, wherein the double container can be pivoted in the vertical plane.

Device and method for processing composite materials containing fibers

The invention relates to a method and a system for purifying process water, particularly for continuously purifying process water in the paper industry. The method comprises at least one process water treatment step, which comprises the following steps: a) an anaerobic purifying step, wherein process water to be purified is brought in contact with anaerobic microorganisms in an anaerobic reactor in order to decompose impurities present in the waste water, b) a first separating step, wherein gases present in the process water obtained in step a) are separated from said process water, and c) a second separating step, wherein solids present in the process water obtained in step b) are separated from the process water.

System and method for treating process water with separate separation of gases and solids

A flotation apparatus () for the separation of solid particles from a suspension with formation of a fraction lacking in solid particles and a fraction rich in solid particles comprises a tank with an inlet () for the suspension, with an outlet () for the fraction lacking in solid particles, with an outlet () for the fraction rich in solid particles, and with at least one block of slats () composed of multiple overlapping slats (), wherein the at least one block of slats () has a rear side oriented toward the tank wall and a front side arranged on the opposite side of the block of slats (). On the rear side of the at least one block of slats, a plate () is arranged which extends over at least a part of the rear side of the block of slats, wherein the plate has a plurality of openings which facilitate the penetration of liquid through the plate. The sum of the areas of the individual openings () in the upper region, relative to the vertical axis, of the plate, per square centimeter of the plate, is greater than the sum of the areas of the individual openings in the lower region of the plate, per square centimeter of the plate.

Flotation apparatus with apertured plate

Disclosed is a system for renovating process water, especially during the production of paper. Said system comprises at least one process water renovation unit, at least one of which is provided with an anaerobic reactor spiked with anaerobic microorganisms as well as a lime elimination unit. Also disclosed is a method for renovating process water, particularly during the production of paper, which encompasses at least one process water renovation step in which at least some of the process water continuously delivered to the process water renovation step is subjected to a purification step in an anaerobic reactor that is spiked with anaerobic microorganisms and to a deliming step.

System and method for the renovation of process water

The present invention relates to a process for the purification of waste water, in particular for the continuous purification of waste water in papermaking, where waste water to be purified is fed to an anaerobic reactor (), the waste water is contacted, in the anaerobic reactor (), with anaerobic microorganisms in order to degrade contaminants present in the waste water, and the purified waste water is discharged from the anaerobic reactor (), where at least some of the waste water is subjected to a pressure-release flotation step () before being supplied to the anaerobic reactor or after being discharged from the anaerobic reactor, in order to delime the water to at least some extent. Furthermore, the present invention relates to a device which is suitable for carrying out the process according to the invention.

Method and apparatus for the anaerobic treatment of waste water

According to the present invention, there is provided a wastewater processing apparatus and method comprising a rotating filter thickener () receiving and filtering a wastewater mixture and producing a first filtrate output and a first sludge output, a screw press thickener () receiving the first sludge output and forming a final sludge output and a second filtrate output, a dissolved air floatator () receiving the first filtrate output from the rotating filter thickener () and producing a first solid output and a third filtrate output. The wastewater processing apparatus and method further comprising a first conductor () for mixing incoming raw manure wastewater and the second filtrate output from the screw press thickener () to produce the wastewater mixture for input to the rotating filter thickener (), and a second conductor () for branching off a part of the first filtrate output to a spray cleaner () for spraying the part of the first filtrate output onto the filtration disks () for their cleaning.

Apparatus and method for processing of animal manure wastewater

The invention relates to a system and a method for the detection of the wear state of machine parts which are subject to mechanical wear, by means of an electronic transmitting/receiving device () and at least one transponder device (), which is embedded in the machine part () and sends back an acknowledgement signal in response to a transmitted signal which is transmitted by the transmitting/receiving device (), in which case the reaching of a predetermined wear value can be indicated by the destruction of the transponder device () and by the lack of the acknowledgement signal associated with this. The invention is based on the discovery that the arrangement of a transponder device at a specific position which is a measure of a predetermined wear state means that the operational readiness of the transponder device, on the one hand, is indicated in advance by its signal return, and the reaching of the predetermined wear value is indicated by its destruction.

Wear detection by transponder destruction

According to the present invention, there is provided a wastewater processing apparatus and method comprising a rotating filter thickener () receiving and filtering a wastewater mixture and producing a first filtrate output and a first sludge output, a screw press thickener () receiving the first sludge output and forming a final sludge output and a second filtrate output, a dissolved air flotator () receiving the first filtrate output from the rotating filter thickener () and producing a first solid output and a third filtrate output, a first conductor () for mixing incoming raw manure wastewater and the second filtrate output from the screw press thickener () to produce the wastewater mixture for input to the rotating filter thickener (), and a second conductor () for branching off a part of the first filtrate output to a spray cleaner () for spraying the part of the first filtrate output onto the filtration disks () for their cleaning.

The invention relates to a fluid separating device for separating fluids and solids from a composite liquid. Said separating device comprises a channel ( ) which is arranged transversely upwards with a closed lower end and an outlet ( ). Said channel is provided with an axial screw conveyor ( ) which is arranged in the interior. A filter tank ( ) communicating with said conveyor is located above the channel ( ). An inlet ( ) for the composite liquid to be separated is located at the upper edge approximately in the middle of the filter tank ( ). A rotation filtering device ( ) is arranged at the free end of the filter tank ( ). Said device partially dips into the fluid contained in the filter tank ( ). The invention provides a means for effectively separating a composite fluid into three different fractions, the clear liquid, a sludge fraction and a particle fraction.

Device for separating fluids

A flotation device for separating materials or mixtures of materials from suspensions includes a reaction and mixing space ( ) with eccentric inlet ( ) for the mixture of suspension particles with gas bubbles and for further transport into at least one centrally arranged vertical suspension distribution tube ( ), wherein the suspension distribution tube ( ) and the clarified fluid collecting tube ( ) are arranged adjacently, the plates ( ) surround the suspension distribution tube ( ) and the clarified fluid collecting tube ( ) in an annular manner; and every second annular plate space ( ) between adjacent plates ( ) is connected to the suspension distribution tube ( ) and every other space ( ) between plates is connected to the clarified fluid collecting tube ( ), so that the flow takes place out of one space ( ) between plates from the inside towards the outside to the separating space ( ), and subsequently into an adjacent space ( ) between plates from the outside towards the inside. The substantive advantages of the invention are in that by combination of the plate arrangement with the eccentrically loaded reaction and mixing space, improved flocculation and thus better processing values are obtained in the filtrate. Better separation values are obtained by separation using the double-plate principle.

Flotation device

The invention relates to a device and a method for chemically and physically separating solid materials from a suspension using flotation. A rotationally symmetrical flocculation/flow reactor is provided with outlets in the lower part thereof and is arranged in a separating tank. At least one suspension inlet extends eccentrically into said reactor. The supplied suspension is guided into said reactor. The supplied suspension is guided into the upper area of the flocculation reactor via the suspension inlet. A circular flow is thus created which drains off from the flocculation reactor downwards in a tangential and radial manner over the outer circumference into circularly arranged distribution cells which reinforce the tangential component of the suspension flow when said flow is delivered into the separating tank. In prior art, the flow of the mixture consisting of the suspension and air-sacs extends radially outwards. One advantage of the invention is that said flow of the mixture has to travel a longer way to the outlets in the area of the wall of the tank due to the tangential flow component. The solid matter can be separated more effectively by virtue of the longer travel path or the longer presence in the separating tank.

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Munich, Germany

Lucas Menke