Patents Assigned to A/A Niro Atomizer
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Patent number: 5120455Abstract: A high strength propping agent for use in hydraulic fracturing of subterranean formations comprising solid, spherical particles having an alumina content of between 40 and 60%, a density of less than 3.0 gm/cc and an ambient temperature permeability of 100,000 or more millidarcies at 10,000 psi.Type: GrantFiled: December 5, 1990Date of Patent: June 9, 1992Assignees: Carbo Ceramics Inc., A/S Niro AtomizerInventor: Eugene P. Lunghofer
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Patent number: 5100509Abstract: Agglomeration is improved in a straight-through spray drying process by adjusting the location for introduction of recycled fine particles to the atomization zone. The fine particles are dispersed in a minor portion of the drying air and adjustment of the location for the introduction of the fine particles is made so as to change the average distance from the wheel to the area where the fine particles meet atomized droplets or partly dried particles. A spray drying apparatus in which the fine particles are recycled through the use of turnable deflectors, telescopic connections or swivel joints which are suitable for achieving the improved agglomeration.Type: GrantFiled: December 27, 1989Date of Patent: March 31, 1992Assignee: A/S Niro AtomizerInventors: Jan Pisecky, Soren P. Hansen
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Patent number: 5085843Abstract: A desulphurization process, in which acid components of waste gas are removed by spray drying absorption, using an aqueous suspension of slaked lime or limestone as absorbent with recycling of part of the reaction product to the absorbent, is controlled on the basis of determination of the chloride content of the aqueous suspension including recycled reaction product.Type: GrantFiled: July 16, 1990Date of Patent: February 4, 1992Assignee: A/S Niro AtomizerInventors: Stig Rasmussen, Bjarne Rasmussen, Karsten S. Felsvang
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Patent number: 5030400Abstract: By agglomeration in a high speed mixer spherical granules having a desired granule size distribution are obtained by supplying the agglomeration liquid by means of an atomizer wheel axially positioned in the high speed mixer and by controlling the quantity and evaporation of said liquid in consideration of the changes occurring with respect to water binding ability of the agglomerates during compaction. An apparatus for carrying out the method includes a mixer bowl with an impeller on a central shaft through the bottom of the bowl and an atomizer with an atomizer wheel with its shaft in alignment with the shaft of the impeller.Type: GrantFiled: June 28, 1990Date of Patent: July 9, 1991Assignee: A/S Niro AtomizerInventors: Svend Danielsen, Per Holm, Gjelstrup H. Kristensen, Torben Schaefer
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Patent number: 5022164Abstract: A fluid bed dryer for processing a particulate material includes a series of chambers separated by longitudinally extending common walls and connected by turn-around sections to provide a serpentine path for the material. Each turn-around section is open to adjacent chambers at one end of one of the common walls to receive and turn particulate material distributed across the width of one of the chambers through an arcuate path and deliver the material to the other chamber. Each of the chambers and turn-around sections have a base including a number of gas introduction openings oriented to introduce gas in a specific direction to fluidize and move the particulate material in that direction. The gas introduction openings in the turn-around sections are oriented to successively receive and turn incremental vertical columns of the particulate material in accordance with the distance each incrmental vertical column is spaced from the common wall.Type: GrantFiled: November 29, 1989Date of Patent: June 11, 1991Assignee: A/S Niro AtomizerInventors: Ove Hansen, C. Douglas Thrasher
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Patent number: 5006204Abstract: An apparatus including an evaporator, a pre-crystallizer, a spray dryer and a fluid bed for drying whey and a rotating disc having a cone-shaped upper surface is provided for receiving partially dried whey from the spray dryer and delivering the whey to the fluid bed while permitting crystallization of the whey as it rests on the surface of the disc.Type: GrantFiled: October 31, 1988Date of Patent: April 9, 1991Assignee: A/S Niro AtomizerInventor: Jens P. Jensen
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Patent number: 4979313Abstract: Hygroscopic powders, especially fat-containing milk products, are cooled by being fludized in cooling air. Dehumidification of the drying air is omitted and overdrying prior to cooling to compensate powder rehumidification during cooling is avoided by using a closed cycle cooling in which the spent cooling air after efficient dust removal and re-cooling is used as cooling and fluidizing air. Substantial energy savings are achieved while product quality is maintained or improved.Type: GrantFiled: January 12, 1990Date of Patent: December 25, 1990Assignee: A/S Niro AtomizerInventor: Jan Pisecky
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Patent number: 4951472Abstract: Particulate granules of a high water content food such as cheese are frozen in a freezing chamber having a perforated bottom plate. The bottom plate is vibrated to develop an oscillating movement while simultaneously introducing a chilled gas through the perforated plate to partially levitate the granules as they are moved through the freezing chamber by the combined action of the oscillating bottom plate and the chilled gas.Type: GrantFiled: August 8, 1989Date of Patent: August 28, 1990Assignee: Niro Atomizer, Inc.Inventors: Ove Hansen, G. Skov Nielsen, Brian Wagstaff
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Patent number: 4898331Abstract: An atomizer wheel for the atomization of slurries of highly abrasive materials which includes a hub secured to a rotating shaft, a wheel bottom connected to the hub, a cylindrical side wall connected with the wheel bottom and a cover plate to form a bowl-shaped feed supply chamber. The side wall includes a number of openings fitted with bushings to provide nozzles which eject droplets of a suspension or slurry provided to the bowl-shaped feed supply chamber. The inner end of each of the bushings extend inwardly from the side wall of the wheel and the inner end or at least a portion of the inner end of at least one of the bushings extends radially inwardly from the side wall a greater distance than the inwardly extending ends of other bushings.Type: GrantFiled: December 22, 1988Date of Patent: February 6, 1990Assignee: A/A Niro AtomizerInventors: Ove E. Hansen, Christopher P. Healy
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Patent number: 4889698Abstract: The ability of activated carbon to remove mercury and noxious polyorganic matter, especially chlorodibenzo-dioxins and -furans from incinerator flue gases is utilized in an efficient manner by suspending powdery activated carbon in the flue gas in connection with a conventional spray absorption process in which the acidic components of the flue gas are neutralized by means of basic absorbents. The cooling of the flue gases in the spray absorption process provides an efficient adsorption onto the powdery activated carbon and the separation of said powdery activated carbon from the flue gas is substantially facilitated by the presence of the particulate material formed by the spray absorption process. Also an improved removal of nitrogen oxides is obtained.Type: GrantFiled: July 8, 1987Date of Patent: December 26, 1989Assignee: A/S Niro AtomizerInventors: Jens T. Moller, Niels Jacobsen, Kirsten K. Nielsen, Stig Rasmussen
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Patent number: 4885848Abstract: A fluid bed dryer comprises a bed plate having gas distributing openings in the plate. The gas distributing openings are arranged in pairs of substantially oppositely directed openings, and a depressed portion of the plate extends between the openings of each pair. Throughfall of products through such openings is substantially eliminated, and by suitably choosing the relationship of the effective area of the oppositely directed openings in the pairs of openings it is possible to obtain a desired relationship between the vertical fluidizing component and the horizontal transporting component of the upwardly directed gas flow through the openings of the bridge plate.Type: GrantFiled: July 13, 1988Date of Patent: December 12, 1989Assignee: A/S Niro AtomizerInventor: Mogens A. Christensen
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Patent number: 4883004Abstract: Corrosion and sulfuric acid formation in an integrated spray-drying and calcining operation is inhibited by operating the calciner at a temperature so that the exit gases from the calciner provides sufficient heat to the spray drier to keep the exit gases from the spray drier at a temperature above the dew point of the SO.sub.3 /H.sub.2 O vapors present in the spray drier exit gas.Type: GrantFiled: August 31, 1988Date of Patent: November 28, 1989Assignee: Niro Atomizer Inc.Inventor: Ove Hansen
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Patent number: 4789532Abstract: In a method for cleaning of flue gas derived from waste incineration, of the kind which comprises spray drying a lime slurry in the hot flue gas, the amount of active lime used is from 1.5 to 2.5 times larger than the amount reacting with the acidic components of the flue gas; furthermore, ground blast-furnace slag is incorporated in the lime slurry in an amount that is equivalent to 30 to 100% by weight of the amount of calcium salts generated at the flue gas cleaning. An end-product is hereby obtained, which upon admixing with water, forms a concrete-like material with high mechanical strength and great ability to retain the pollutants present therein so that the product is suited for disposal in nature with a minimum risk of polluting water streams and ground water.Type: GrantFiled: January 12, 1987Date of Patent: December 6, 1988Assignee: A/S Niro AtomizerInventors: Ebbe S. Jons, Jens T. Moller, Kirsten K. Nielsen
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Patent number: 4772383Abstract: A high-gradient magnetic separator is provided for filtrating weakly magnetic particles from a fluid in which they are suspended. The fluid is caused to flow through a separation chamber arranged in a gap in a magnetic circuit which comprises a pair of separate permanent magnetic devices connected by means of yoke members of a magnetic soft material. Permanent magnet devices generate a strong magnetic field in the gap with very small magnetic losses. Each permanent magnetic device comprises a permanent magnetic member with a substantially linear demagnetization curve. A matrix of magnetic soft material is disposed in the gap between pole surfaces of the permanent magnetic devices to create high local magnetic gradients. To facilitate cleaning of the matrix filter material, the separation chamber is formed as a displaceable box-shaped cannister.Type: GrantFiled: August 30, 1982Date of Patent: September 20, 1988Assignee: A/S Niro AtomizerInventor: Orla Christensen
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Patent number: 4769130Abstract: A high-gradient magnetic separator is provided for filtrating weakly magnetic particles from a fluid in which they are suspended. The fluid is caused to flow through a separation chamber arranged in a gap formed between a pair of opposed pole surfaces of a pair of separate permanent magnetic devices connected with a closed magnetic circuit which includes yoke members. The permanent magnetic devices generate a strong magnetic field in the gap, the magnetic field having a field direction substantially transverse to at least a portion of the flow path of the fluid through the separation chamber. The permanent magnetic devices each include at least one permanent magnetic member having a substantially linear demagnetization curve. A matrix of soft magnetic material is located in the separation chamber to create local magnetic gradients in the magnetic field. The matrix includes strands extending in planes substantially transverse to the magnetic field direction.Type: GrantFiled: May 25, 1983Date of Patent: September 6, 1988Assignee: A/S Niro AtomizerInventor: Orla Christensen
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Patent number: 4760815Abstract: Apparatus for displacing air through a cabinet for spraying paint. In the preferred embodiment, first and second fans are mounted in a case, and first and second valves are pivotally mounted within the case. In a first position of the valves, the first fan draws fresh air from outside the case and discharges it into the cabinet while the second fan draws air from the cabinet and discharges it from the case to the outside via an exhaust. The valves may be moved to a second position to cause the simultaneous closing of the discharge of the first fan, interruption of a portion of the second fan discharge that is directed to the exhaust, and opening of the discharge of the second fan into the interior of the cabinet, thereby providing for recirculation of cabinet air.Type: GrantFiled: April 1, 1987Date of Patent: August 2, 1988Assignee: NIRO Atomizer B.V.Inventor: Ludwig G. Rockx
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Patent number: 4755366Abstract: The ability of a waste gas cleaning spray drying absorber to tolerate substantial variations in the amount of waste gas to be cleaned is enhanced by a system which provides for introduction of any amount of waste gas that would overload the gas disperser(s) of the spray drying absorber, into said absorber via auxiliary apertures in the walls thereof thereby bypassing the gas disperser(s).A plant for cleaning fluctuating amounts of waste gas comprises a control system based on measurement of gas flow to the gas disperser(s).Type: GrantFiled: January 23, 1986Date of Patent: July 5, 1988Assignee: A/S Niro AtomizerInventor: Christian Schwartzbach
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Patent number: 4733821Abstract: An atomizer wheel for use in a spray drying apparatus comprises an interior annular liquid supply chamber, from which a number of substantially radial ejection ducts extends towards the external surface of the wheel through a length constituting a considerable portion of the radius of the wheel. The ducts discharge into a downwardly open annular discharge slit at a comparatively short distance from an external wall connected with a wheel cover and whose inner wall surface forms an axial-symmetrical surface of revolution with a substantially linear generatrix forming an angle of not more than 15.degree. with the axis of revolution.Type: GrantFiled: October 21, 1985Date of Patent: March 29, 1988Assignee: A/S Niro AtomizerInventors: Arnold N. Jensen, Jan Pisecky
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Patent number: 4713226Abstract: A process for providing finely divided limestone products. Limestone is abrasively ground in an aqueous media in the presence of added dissolved carbon dioxide or in the presence of a soluble acid-forming compound, the anion of which forms a soluble calcium compound, or in the presence of both dissolved carbon dioxide and an acid-forming compound.A dry flue gas desulfurization process using the finely divided limestone product of the process of the invention is also provided.Type: GrantFiled: September 8, 1986Date of Patent: December 15, 1987Assignee: A/S Niro AtomizerInventor: Preston L. Veltman
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Patent number: 4684065Abstract: The atomizer wheel is provided along the circumference of its external wall (3) with a number of ejection apertures, in which wear-resistant ceramic linings (7) are arranged by means of replaceable steel bushings (8). The steel bushings (8) and/or the linings (7) project somewhat into the annular chamber of the atomizer wheel and the bushings are sealed against the external wall (3) with sealing rings (11). Moreover, each bushing (8) is provided in its inner surface facing the associate lining (7) with a flat recess (13) extending on either side of the inner surface of the external wall (3). Thereby, the steel bushings (8) may be resiliently deformed without transferring excessive stresses to the linings (7).Type: GrantFiled: April 10, 1986Date of Patent: August 4, 1987Assignee: A/S Niro AtomizerInventor: Lauge Svarrer