WO1989007743A1 - Procede et dispositif pour deshydrater des matieres humides, notamment des produits en vrac aqueux coulants et/ou versables - Google Patents

Procede et dispositif pour deshydrater des matieres humides, notamment des produits en vrac aqueux coulants et/ou versables Download PDF

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Publication number
WO1989007743A1
WO1989007743A1 PCT/DE1988/000094 DE8800094W WO8907743A1 WO 1989007743 A1 WO1989007743 A1 WO 1989007743A1 DE 8800094 W DE8800094 W DE 8800094W WO 8907743 A1 WO8907743 A1 WO 8907743A1
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WO
WIPO (PCT)
Prior art keywords
drying
stage
vacuum
distribution
moisture
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/DE1988/000094
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German (de)
English (en)
Inventor
Yorck-Uwe Prehm
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
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Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to DE19863629954 priority Critical patent/DE3629954A1/de
Application filed by Individual filed Critical Individual
Priority to PCT/DE1988/000094 priority patent/WO1989007743A1/fr
Publication of WO1989007743A1 publication Critical patent/WO1989007743A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/13—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B5/00—Drying solid materials or objects by processes not involving the application of heat
    • F26B5/04—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum
    • F26B5/041—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum for drying flowable materials, e.g. suspensions, bulk goods, in a continuous operation, e.g. with locks or other air tight arrangements for charging/discharging

Definitions

  • the invention relates to a method for dewatering wet goods, in particular water-containing, free-flowing and / or pourable bulk goods such as sludge, faeces, sludge-like deposits such as silt, bulk goods such as grain, and a device for carrying out the method.
  • Transporting and dumping dredged material into the high seas or returning mud or silt to the natural sediment load of a river are associated with ecological problems as well as with transport and unloading problems. So since the storage and drainage of sludge or silt in sinks due to Space requirements as well as environmental pollution or dumping are no longer possible and justifiable today and in any case in the future, other measures to accommodate sludge / silt, treatment and / or disposal must be found.
  • a thermal treatment system comprises the burner and combustion chamber of a boiler in order to generate thermal energy and to carry out the direct heat exchange.
  • This and the subsequent heat treatment result in a relatively extensive and costly process or a correspondingly complex device.
  • the treatment process is practically only applicable to drying solid particles that already have a relatively low moisture content.
  • a lock is provided in order to prevent atmospheric oxygen from mixing with waste steam, so that only a discontinuous loading of the system or only a discontinuous discharge is possible.
  • Another drying / heat treatment method or a device provided therefor are based on indirect drying by heat treatment of moist solids.
  • a relatively complex system is required to generate the thermal energy.
  • additional suppression must be provided and set up as an auxiliary unit in order to prevent the formation of an explosive, oxygen-air mixture by oxygen removal and to prevent To avoid malfunction of the system or endanger human life.
  • landfill sites have so far only been able to be dismantled to a limited extent over a long period of time, although the capacity of the washing fields is no longer sufficient, new washing fields for landscape interventions and the pollution of sludge and silt considerably Cause environmental pollution.
  • the environment When looking for ways to house or treat sludge and silt, the environment must be protected as much as possible and costs must be kept as low as possible.
  • government funding has been made available and research contracts have been awarded without it having been satisfactorily possible to adequately dewater wet material in large quantities by machine technology.
  • the object of the invention is to treat wet goods in a particularly energy-saving manner and to a maximum degree in an environmentally friendly manner and to create a drying process with which, in particular, large amounts of water-containing goods can be dried in a short time with continuous loading and operation, whereby this is guaranteed It is intended that the end product be available in a dust-like dry state and that the process can be operated relatively simply and therefore particularly cost-effectively or that the device required for this is relatively simple.
  • the object is achieved according to the invention in the method mentioned at the outset in that the distributing and / or dispersing solid particle material is continuously conveyed and continuously with a vacuum (underpressure) adapted to the distribution state, the degree of moisture and / or the quantity conveyed. is applied, with the vacuum being used to separate and remove moisture with the formation of relaxation drying and the flash drying is maintained until the powder dries the solid particles, and that the powder-dry material is continuously discharged.
  • a vacuum underpressure
  • the distribution device at least one container, one chamber, one tube is connected to a discharge device which serves to remove the dry goods and which is connected via conveyor devices to a distribution device dynamically equalizing and / or distributing solid particles of the material to be dewatered or the like. as well as a device for conveying the distributed solid material and that the distribution / conveying device has at least one stage with a vacuum device for flash drying.
  • Wet goods in particular highly water-containing, free-flowing and / or pourable bulk goods such as silt and / or sludge, are processed in an energy-saving manner, in large quantities, continuously and in a short time to a dusty, dry, in particular odorless product, the water removed being free of inorganic substances are obtained, in particular can have drinking water quality and the dry product - for example by combustion - can be easily removed and / or further processed. Drying to powder dryness is achieved exclusively by vacuum without heating the water-solids mixture. Process and structural simplification results in particular from the fact that no preheating of the medium to be dried is required.
  • a process which can be used on a large industrial scale and a system or device provided for this purpose which is compact, economical and can be operated at high throughputs have been achieved, with particular reference to the treatment or elimination of river, port and / or
  • Sea sludge and / or silt a landfill that is harmful to health, landscape-destroying, environmentally threatening and requires space.
  • Wet dredged material in particular also a mixture of sand and silt, can be fed directly to the process and, since drying surfaces are no longer required, also weather-resistant dependent, immediately and in a short time to a powder-like, dust-dry material that is transported in compressed form at low cost, burned, classified as dry goods and / or, in particular in the form of additives for building materials or materials , for example for tiles, building blocks, ceramic plates or the like. or as a fertilizer, can be further processed or used.
  • the time-consuming preparation of drying areas, pumping around and securing storage areas is no longer necessary, and pollutants can no longer enter the
  • the method according to the invention and the device according to the invention ensure an economically and ecologically particularly favorable treatment and / or utilization of sludge and / or silt and can be operated continuously and relatively easily in terms of operation, e.g. chemical additives and / or mixtures with other substances are avoided.
  • the method and the device are also very generally suitable, mass-produced, granular material or particle-containing wet and / or liquid goods of any kind, in particular also in the form of a mixture with components of different grain sizes, e.g. Coal sludge, drilling muds, faeces and wet grain, to drain to powder dryness.
  • flash drying takes place in drying stages connected in series. It is particularly advantageous for the continuous implementation of the process and / or for a particularly economical, energy-saving process of the process that the working pressure determining the degree of evacuation of each stage downstream in the conveying direction is generated less than in the previous stage. In particular, the total voltage drying is thus designed and maintained particularly reliably.
  • a very favorable process sequence results in particular from the fact that the flash drying is carried out in three successive stages, the working pressure of the vacuum in particular 20-30 bar in the first stage, 10-20 mbar in the second stage and 5 - 10 mbar in the third stage.
  • a particularly economical mode of operation and great effectiveness of the process are also achieved in a particularly expedient manner in that the distribution in the second drying stage is carried out in such a way that the degree of distribution is particularly large compared to the degrees of distribution in other drying stages, the particles being constant , in particular by swirling, deagglomerated and loosened, ie equalized, rotated and moved.
  • the deagglomeration and loosening, and in particular an associated surface distribution of solid particles can be achieved in a particularly pronounced manner in that the material is collected after at least one flash drying, preferably after the first, then conveyed along a slope and fed to a further flash drying which the flow of material is subjected to centrifugal force and gravity.
  • the dynamic distribution of the solid particles with a vacuum adapted to the state of distribution, the degree of moisture and / or the delivery rate can be achieved particularly simply and effectively in that the material surfaces that are equalized by shaking, swirling and / or material particles, in particular transporting them and / or disagglomerating, loosening and distributing them during transport.
  • the material can be surface-distributed in a particularly favorable manner, ie that a large effective area is achieved in a small space, so that moisture can be removed and removed very effectively from finely divided particles or from very thin layers.
  • the material to be dewatered is first heated and roughly dewatered at the start of the process.
  • a very cheap energy-saving coarse drainage specially adapted for the subsequent flash drying is that the material for the coarse drainage is heated to approx. 20-25 ° C. and a high percentage of the moisture, in particular approx. 30-60% of the liquid, is drawn off.
  • the invention proposes that the flow of the material to be dewatered in the area of the coarse drainage be temporarily interrupted and / or reduced in speed.
  • Part of the doses are carried out synchronously, in particular as a function of the delivery rate and / or the consistency of the material to be dewatered.
  • a particularly simple and powerful embodiment consists in that the vacuum device comprises a condenser, a first vacuum pump, in particular a root pump, and a second downstream vacuum pump, in particular a water ring pump.
  • the device In order to operate the device in a particularly economical, energy-saving and particularly reliable manner to maintain the flash drying process, it is provided that it comprises flash drying stages connected in series, each of which is connected to its own vacuum device, the vacuum devices being designed in this way that the working pressure of each stage downstream in the conveying direction can be generated less than in the previous stage.
  • a particularly compact, powerful device which performs the material drying particularly quickly is achieved in that it comprises three relaxation drying stages and in that the distribution device has a conveying space which is assigned to the middle stage and has a high distribution efficiency. The middle stage with simultaneous moisture separation is thus provided for a distribution of the solid material with a higher distribution efficiency compared to the other two relaxation drying stages.
  • a collecting container and a conveying section vertically conveying the material from it to the central expansion drying stage are provided behind the inlet-side expansion drying stage and the middle stage has an elongated, vertically oriented tubular container which produces centrifugal and gravitational forces, encloses swirling device equipped with distribution surfaces rotating perpendicular to the container axis.
  • a particularly advantageous embodiment consists in the fact that the drying stage on the inlet side and the drying stage on the outlet side comprise elongated tubular containers which extend horizontally and in their tunnel-like interior for material conveyance and -distribution have at least one, preferably a plurality of mutually arranged, mutually offset, oppositely running conveyor belts running in the longitudinal direction of the container.
  • the opposing arrangement of conveyor belts ensures a particularly favorable, pronounced and simple deagglomeration and loosening or (surface) distribution of the solid particles.
  • the device between the charging device and the relaxation drying stage comprises a heating and coarse dewatering device.
  • the heating for which in particular a relatively low temperature, preferably in the range of 20-25 ° C., is sufficient, can be carried out particularly simply, effectively, quickly and in an energy-saving manner by the heating and coarse dewatering device for heating the material one inside
  • Heat-emitting oil-carrying screw conveyors or presses which transfer heat to the material to be conveyed.
  • the coarse drainage is particularly conveniently carried out by means of a moisture-extracting vacuum pump.
  • the speed and / or effectiveness of the preliminary drainage can be increased by providing the heating and coarse drainage device with a throttle device on the output side.
  • a continuous process sequence can be achieved particularly without problems and also with a view to energy-saving operation which is adapted to drying with a high degree of efficiency, in particular by introducing the drying material into a drying stage, into a collecting container, into the discharge device and / or into the heating and coarse dewatering device metering the material flow quantity and allowing the material to pass only in the conveying direction are provided.
  • conveying pipes with suitable, i.e. the material flow influencing and determining diameters can be provided.
  • the device comprises a metering control device which controls and actuates several material locks, the material locks preferably serving as cellular wheel conveyors are trained.
  • the device comprises a control device assigned to the vacuum generating devices in order to determine the moisture level, the delivery quantity and / or the working or operating pressures in the containers, chambers, pipes or the like adapted to the material properties. to create.
  • the dynamic distribution i.e. the deagglomeration, loosening and / or surface distribution of the solid particles with regard to the removal and removal of moisture can be achieved particularly effectively and advantageously in that the container, the chamber, the pipes or the like.
  • an expansion drying stage for deagglomeration, loosening and / or surface distribution of the solid material vibrating screens, rotating rollers or centrifugal surfaces, screw conveyors, conveyor belts, propellers or the like. Desagglo erations-, turbulence and / or delay units.
  • a very expedient and practical requirements that meet the design of the device is that the device parts and / or
  • Units are connected to one another by means of a basic frame unit such as a platform, a mounting frame and / or a container receiving and / or carrying them. This ensures that the device can be installed quickly and easily on site, e.g. Can be assembled and / or operated in the form of a kit, it is transportable as a whole and / or as a mobile, operational functional unit. Available.
  • a basic frame unit such as a platform, a mounting frame and / or a container receiving and / or carrying them.
  • the method or The device according to the invention for carrying out the method in particular achieves that granular wet material is dried continuously, inexpensively, in large quantities and quickly to dryness of dust and powder. Solid particles are very finely distributed while avoiding lump formation, moisture being removed at the same time by applying a vacuum in such a way that the particles neither ice up nor the liquid evaporates excessively. The resulting dry goods can be transported safely, stored safely and compressed and / or processed.
  • FIG. 1 shows a block diagram of a device according to the invention for representing a method according to the invention
  • Fig. 2 shows a device according to the invention in side view
  • Fig. 3 shows an inventive device in
  • a device according to the invention comprises three expansion drying stages 3, 5 and 6 connected in series.
  • the input-side stage 3 is via a
  • Heating and coarse dewatering device 2 connected to a funnel 1 for feeding wet material N to be dried.
  • a collecting container 4 is arranged, which is connected to the stage 5 via a conveyor line 41.
  • Each expansion stage 3, 5 or 6 comprises a container 31, 51 or 61 for the material to be conveyed and a vacuum generating device 300, 500 or 600.
  • Each vacuum generating device has a condenser 32 connected to the associated container 31, 51 or 61, 52 or 62, a first vacuum pump connected to it, for example a root pump 33, 53 or 63, and a second downstream vacuum pump, for example a water ring pump 34, 54 or 64.
  • the vacuum generators and containers are designed to draw a large volume.
  • the heating and coarse dewatering device 2 is equipped with a material heater 21, e.g. equipped with an oil-carrying screw conveyor or heat presses and connected to a vacuum pump 22 which removes moisture from the material to be conveyed from a vacuum chamber 23.
  • a throttle device 24 is arranged at the output of the device 2.
  • the material flow quantity is metering, the material only in the conveying direction permeable material locks 81, 82, 83, 84 and 85 are provided.
  • These material locks can in particular be designed as self-regulating pipe conveyor lines.
  • Another special embodiment of the invention is that material locks 81, 82, 83, 84 and 85, or the like, in particular as cellular material conveyors that pass through the material only in the conveying direction. are designed to be controlled by a dosing control device 8 which controls and actuates them jointly and / or synchronously.
  • the control device 8 is such constructed in such a way that it supplies the material locks with control values s as a function of values f for the quantity conveyed in the area of the locks and / or measured values k for the consistency of the required goods.
  • a vacuum control device 9 shown in FIG. 1 which, via suitable actuators (not shown), brings about working or operating pressures in the containers 31, 51 or 61 by means of control values v, each of which as a result of im Range of the container measured or corresponding values g, m, b and / or t for moisture level, flow rate, material properties and / or temperature of the material to be conveyed.
  • the containers 31 and 61 are designed as elongated tubular and tunnel-like conveying spaces which extend horizontally and have at least one, preferably a plurality of stacked, mutually offset conveyor belts (not shown) arranged opposite one another in the longitudinal direction of the container, which are arranged one above the other and offset in the longitudinal direction of the container .
  • the container 51 of the middle (second) stage 5 is designed as an elongated, vertically oriented tubular distributor and conveying space, which produces centrifugal and gravitational force and is equipped with distribution surfaces rotating not perpendicular to the container axis (not shown) ) Encloses vortex device.
  • a conveyor system 41 is provided, e.g. a shaft conveyor which transports the material from the collecting container 4 into the upper area of the
  • the relaxation drying level 5 with container 51 is provided to bring about a particularly pronounced deagglomeration, loosening and a particularly large effective surface of the solid particles in this stage, these being constantly equalized, rotated and moved by swirling and the action of gravity.
  • wet material N in particular strongly water-containing sludge, for example a sand / silt mixture, silt or the like, passes.
  • Bulk material through the material lock 81 into the heating and coarse dewatering device 2.
  • the material is heated at a temperature in the range of 22 ° C. and roughly dewatered by means of the vacuum pump 22.
  • the flow of material can be delayed or briefly interrupted by the throttle device 23 in order to accelerate the pre-dewatering process. This throttling is carried out in such a way that continuous feeding of the device and subsequent continuous transport and drying of the material to be conveyed are not impeded.
  • the material After passing through the further material lock 82, the material passes into the container 31 of the first flash drying stage 3, in which it is deagglomerated, and where, at the same time, due to the formation of a vacuum flash drying with a working or operating pressure provided for this, in particular from 20 to 30 mbar, moisture is separated and drawn off by the vacuum device 300. From the container 31, the material is fed via the material lock 83 into the collecting container 4, from which it is continuously fed via the conveying path 41 into the container 51 of the second flash drying stage 5.
  • a one-stage flash drying can be carried out according to the invention.
  • the relaxation drying according to the invention is characterized in particular by the fact that the material is continuously in
  • the multi-stage serial and / or a multi-stage parallel flash drying enables the throughput in a particularly simple manner Efficiency of the method to further increase an economical, energy-saving mode of operation and / or to create a particularly compact, transportable device.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Molecular Biology (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

Dans un procédé pour déshydrater des produits humides renfermant des matières particulaires ou granulaires, jusqu'à obtention d'une poudre sèche, par des moyens mécaniques rapides, économiques et sobres en énergie, des particules solides sont réparties dynamiquement en au moins un étage de séchage et l'humidité est séparée et extraite, par application continue d'un vide approprié, de la matière en cours de distribution et/ou déjà distribuée. A cet effet, un dispositif comporte au moins un système ou étage (3, 5, 6) qui effectue un séchage de détente, égalise, distribue et transporte de manière dynamique des particules solides dans un récipient (31, 51, 61) ou similaire, et produit un vide au moyen duquel il extrait et évacue l'humidité.
PCT/DE1988/000094 1986-09-03 1988-02-20 Procede et dispositif pour deshydrater des matieres humides, notamment des produits en vrac aqueux coulants et/ou versables Ceased WO1989007743A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19863629954 DE3629954A1 (de) 1986-09-03 1986-09-03 Verfahren und vorrichtung zur entwaesserung von nassgut, insbesondere schlick
PCT/DE1988/000094 WO1989007743A1 (fr) 1988-02-20 1988-02-20 Procede et dispositif pour deshydrater des matieres humides, notamment des produits en vrac aqueux coulants et/ou versables

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/DE1988/000094 WO1989007743A1 (fr) 1988-02-20 1988-02-20 Procede et dispositif pour deshydrater des matieres humides, notamment des produits en vrac aqueux coulants et/ou versables

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WO1989007743A1 true WO1989007743A1 (fr) 1989-08-24

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PCT/DE1988/000094 Ceased WO1989007743A1 (fr) 1986-09-03 1988-02-20 Procede et dispositif pour deshydrater des matieres humides, notamment des produits en vrac aqueux coulants et/ou versables

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU634753B2 (en) * 1988-12-27 1993-03-04 Georgia Kaolin Company, Inc. Method of concentrating slurried kaolin

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE506512A (fr) *
DE318127C (fr) *
DE577601C (de) * 1931-10-22 1933-06-03 Reckitt & Sons Ltd Vakuumtrockner fuer pastenfoermige Stoffe
CH185218A (de) * 1935-09-19 1936-07-15 Dienst Karl Senkrecht stehender Vakuumtrockner.
GB479090A (en) * 1936-07-30 1938-01-31 George William Riley Improvements in or relating to processes and apparatus for drying granular or powdered materials
FR49539E (fr) * 1938-06-08 1939-05-01 Appareil de séchage par le vide, disposé verticalement et dans lequel la matière descend
US2386052A (en) * 1942-08-06 1945-10-02 Lundy Bertram Fair Dehydrating apparatus
CH283158A (de) * 1949-10-27 1952-05-31 Buehler Ag Geb Einrichtung zum Betätigen von Schleusen, Beschickungs- und Austragvorrichtungen sowie von Evakuierungs- und Belüftungseinrichtungen, insbesondere für Vakuumtrockner.
GB880183A (en) * 1957-04-01 1961-10-18 Willy Glaser Improvements in dehydration
DE2048494A1 (de) * 1970-10-02 1972-04-06 Leybold Heraeus GmbH & Co KG, 5000 Köln Vorrichtung zur thermischen Be handlung von Pulvern und Granulaten
US4208285A (en) * 1976-07-12 1980-06-17 Dresser Industries, Inc. Drill cuttings disposal system with good environmental and ecological properties
DE3629954A1 (de) * 1986-09-03 1988-03-10 Prehm Yorck Uwe Dipl Ing Verfahren und vorrichtung zur entwaesserung von nassgut, insbesondere schlick

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE506512A (fr) *
DE318127C (fr) *
DE577601C (de) * 1931-10-22 1933-06-03 Reckitt & Sons Ltd Vakuumtrockner fuer pastenfoermige Stoffe
CH185218A (de) * 1935-09-19 1936-07-15 Dienst Karl Senkrecht stehender Vakuumtrockner.
GB479090A (en) * 1936-07-30 1938-01-31 George William Riley Improvements in or relating to processes and apparatus for drying granular or powdered materials
FR49539E (fr) * 1938-06-08 1939-05-01 Appareil de séchage par le vide, disposé verticalement et dans lequel la matière descend
US2386052A (en) * 1942-08-06 1945-10-02 Lundy Bertram Fair Dehydrating apparatus
CH283158A (de) * 1949-10-27 1952-05-31 Buehler Ag Geb Einrichtung zum Betätigen von Schleusen, Beschickungs- und Austragvorrichtungen sowie von Evakuierungs- und Belüftungseinrichtungen, insbesondere für Vakuumtrockner.
GB880183A (en) * 1957-04-01 1961-10-18 Willy Glaser Improvements in dehydration
DE2048494A1 (de) * 1970-10-02 1972-04-06 Leybold Heraeus GmbH & Co KG, 5000 Köln Vorrichtung zur thermischen Be handlung von Pulvern und Granulaten
US4208285A (en) * 1976-07-12 1980-06-17 Dresser Industries, Inc. Drill cuttings disposal system with good environmental and ecological properties
DE3629954A1 (de) * 1986-09-03 1988-03-10 Prehm Yorck Uwe Dipl Ing Verfahren und vorrichtung zur entwaesserung von nassgut, insbesondere schlick

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU634753B2 (en) * 1988-12-27 1993-03-04 Georgia Kaolin Company, Inc. Method of concentrating slurried kaolin

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