Abrégé

The invention relates to a method for energy-optimised granulation of urea-containing particles in a fluidised-bed granulator system (1). In a method in which the energy required for cooling the urea-containing particles is minimised, wherein the method and the operation of the fluidised-bed granulator system (1) are optimised in terms of process technology, the urea-containing particles are, after granulation, cooled in a cooling zone (2) of a fluidised-bed granulator (3) to a temperature in a range between 80°C and 108°C and at least some of the urea-containing particles are, after pre-screening, cooled by means of a bulk flow cooler (4) to a temperature in a range between 30°C and 50°C.

Classes IPC  ?

• C05C 9/00 - Engrais contenant de l'urée ou ses composés
• B01J 2/16 - Procédés ou dispositifs pour la granulation de substances, en généralTraitement de matériaux particulaires leur permettant de s'écouler librement, en général, p. ex. en les rendant hydrophobes par suspension de la substance en poudre dans un gaz, p. ex. sous forme de "lits fluidisés" ou de rideau
• B01J 2/26 - Procédés ou dispositifs pour la granulation de substances, en généralTraitement de matériaux particulaires leur permettant de s'écouler librement, en général, p. ex. en les rendant hydrophobes sur des bandes transporteuses sans fin
• C05G 5/12 - Granulés ou flocons

Abrégé

An installation for the production of granular urea, having at least one urea granulator, at least one dust scrubber, at least one concentrating device, and at least one condensation device, wherein an exhaust gas flow from the urea granulator can be fed to the dust scrubber, wherein the exhaust gas flow is washed in the dust scrubber, wherein at least one outflow from the dust scrubber can be fed to the concentrating device, wherein the outflow can be concentrated in the concentrating device, wherein the vapors created during concentration can be fed, at least in part, to the condensation device, and wherein the vapors are at least partially condensed in the condensation device.

Classes IPC  ?

• C05C 9/00 - Engrais contenant de l'urée ou ses composés
• B01D 47/06 - Nettoyage par pulvérisation
• B01D 53/00 - Séparation de gaz ou de vapeursRécupération de vapeurs de solvants volatils dans les gazÉpuration chimique ou biologique des gaz résiduaires, p. ex. gaz d'échappement des moteurs à combustion, fumées, vapeurs, gaz de combustion ou aérosols

Abrégé

A method for producing a fertilizer that comprises urea and/or at least one ammonium compound may involve obtaining ammonia as an impurity in the production process, and photocatalytically decomposing the ammonia by irradiation with UV radiation. Further, an apparatus for producing fertilizer granules that comprise urea and/or at least one ammonium compound may include a plant section having a fertilizer granulator configured to produce the fertilizer granules, a supply line configured to pass a urea melt or a concentrated urea solution to the plant section, a UV lamp arrangement that is proximate the supply line and is configured to irradiate with UV radiation the urea melt or the concentrated urea solution flowing in the supply line.

Classes IPC  ?

• C05C 9/00 - Engrais contenant de l'urée ou ses composés
• C05G 5/12 - Granulés ou flocons
• B01J 35/00 - Catalyseurs caractérisés par leur forme ou leurs propriétés physiques, en général

Abrégé

A fluidized bed granulator for production of urea-containing or nitrate-containing granules may include a granulator interior having granulator interior walls with a first granulator side wall, a second granulator side wall, a granulator front wall that extends transversely to the granulator side walls, and a granulator back wall that likewise extends transversely at the opposite end of the granulator interior from the granulator front wall, a horizontal perforated plate that bounds the granulator interior in a downward direction, a seed entry opening, and a granule exit opening that is disposed at a distance in front of the granulator back wall. A process for producing urea-containing or nitrate-containing granules may utilize the fluidized bed granulator.

Classes IPC  ?

• B01J 2/04 - Procédés ou dispositifs pour la granulation de substances, en généralTraitement de matériaux particulaires leur permettant de s'écouler librement, en général, p. ex. en les rendant hydrophobes par division du produit liquide en gouttelettes, p. ex. par pulvérisation, et solidification des gouttelettes en milieu gazeux
• C05C 9/00 - Engrais contenant de l'urée ou ses composés
• C05C 1/02 - GranulationPastillageStabilisationColoration

Abrégé

The invention relates to an installation (1) for the production of granular urea, having at least one urea granulator (2), at least one dust scrubber (3), at least one concentrating device (4), and at least one condensation device (5), wherein an exhaust gas flow (6) from the urea granulator (2) can be fed to the dust scrubber (3), wherein the exhaust gas flow (6) is washed in the dust scrubber (3), wherein at least one outflow (7) from the dust scrubber (3) can be fed to the concentrating device (4), wherein the outflow (7) can be concentrated in the concentrating device (4), wherein the vapors (8) created during concentration can be fed, at least in part, to the condensation device (5), and wherein the vapors (8) are at least partially condensed in the condensation device (5). Indicating an installation (1) for the production of granular urea, in which a clogging up of parts of the installation by non-water-soluble substances can be avoided wherever possible, is characterized in that possible deposits of non-water-soluble substances, in particular sulfur, in the condensation device (5) can be removed from the condensation device (5) while it is running.

Classes IPC  ?

• B01D 47/06 - Nettoyage par pulvérisation
• B01D 53/00 - Séparation de gaz ou de vapeursRécupération de vapeurs de solvants volatils dans les gazÉpuration chimique ou biologique des gaz résiduaires, p. ex. gaz d'échappement des moteurs à combustion, fumées, vapeurs, gaz de combustion ou aérosols
• C05C 9/00 - Engrais contenant de l'urée ou ses composés
• C07C 273/16 - SéparationPurification

Abrégé

The invention relates to a plant (1) for producing urea granules, comprising at least one urea granulator (2), at least one dust scrubber (3), at least one concentration device (4) and at least one condensation device (5). In this plant: an exhaust gas stream (6) from the urea granulator (2) can be fed to the dust scrubber (3); the exhaust gas stream (6) is scrubbed in the dust scrubber (3); at least one outflow (7) from the dust scrubber (3) can be fed to the concentration device (4); the outflow (7) can be concentrated in the concentration device (4); the vapour (8) produced during the concentration can be fed at least partially to the condensation device (5); and the vapour (8) is condensed at least partially in the condensation device (5). A plant (1) for producing urea, in which clogging of plant parts by water-insoluble substances can be avoided as much as possible, is characterised in that in the condensation device (5) possible deposits of water-insoluble substances, in particular sulfur, can be removed from the condensation device (5) during operation.

Classes IPC  ?

• B01D 47/06 - Nettoyage par pulvérisation
• C07C 273/16 - SéparationPurification
• B01D 53/00 - Séparation de gaz ou de vapeursRécupération de vapeurs de solvants volatils dans les gazÉpuration chimique ou biologique des gaz résiduaires, p. ex. gaz d'échappement des moteurs à combustion, fumées, vapeurs, gaz de combustion ou aérosols
• C05C 9/00 - Engrais contenant de l'urée ou ses composés

Abrégé

A fluid-bed granulator system for producing fertilizer granules with a defined size including a fluid-bed granulator, a first cooler externally connected with the fluid-bed granulator or forming an internal part of the fluid-bed granulator, and a product screen connected with the first cooler. The product screen includes an exit for on-size particles; an exit for oversized particles and an exit for undersized particles. The exit for undersized particles is connected to the fluid-bed granulator and the exit for oversized particles is connected to the fluid-bed granulator via one or more crushers. The exit for on-size particles is connected to a first splitter. The first splitter is connected to the fluid-bed granulator and a post processing unit. A particle size analyzer is located between the fluid-bed granulator and the product screen.

Classes IPC  ?

• B01J 2/16 - Procédés ou dispositifs pour la granulation de substances, en généralTraitement de matériaux particulaires leur permettant de s'écouler librement, en général, p. ex. en les rendant hydrophobes par suspension de la substance en poudre dans un gaz, p. ex. sous forme de "lits fluidisés" ou de rideau
• B01J 8/00 - Procédés chimiques ou physiques en général, conduits en présence de fluides et de particules solidesAppareillage pour de tels procédés
• B01J 8/18 - Procédés chimiques ou physiques en général, conduits en présence de fluides et de particules solidesAppareillage pour de tels procédés les particules étant fluidisées
• C05C 9/00 - Engrais contenant de l'urée ou ses composés
• C05G 5/12 - Granulés ou flocons

Abrégé

A spray nozzle for production of urea fertilizer granules and/or urea-sulfur fertilizer granules has a conveying channel and an atomizing gas channel. The conveying channel has at least one separating pin and the atomizing channel has at least one swirl element. The swirl element has inserts, cutouts and moving and fixed elements. The disclosure also sets out a fluidized bed granulator with a spray nozzle for production of a urea-sulfur fertilizer, a process for producing a urea-sulfur fertilizer, and the use of the spray nozzle for production of fertilizer granules.

Classes IPC  ?

• C05C 9/00 - Engrais contenant de l'urée ou ses composés
• B01J 2/16 - Procédés ou dispositifs pour la granulation de substances, en généralTraitement de matériaux particulaires leur permettant de s'écouler librement, en général, p. ex. en les rendant hydrophobes par suspension de la substance en poudre dans un gaz, p. ex. sous forme de "lits fluidisés" ou de rideau
• B05B 7/00 - Appareillages de pulvérisation pour débiter des liquides ou d'autres matériaux fluides provenant de plusieurs sources, p. ex. un liquide et de l'air, une poudre et un gaz
• B05B 7/10 - Pistolets pulvérisateursAppareillages pour l'évacuation produisant une turbulence à la sortie

Abrégé

The invention relates to a method for producing a fertiliser containing urea and/or at least one ammonium compound, wherein ammonia arises as a contaminant during the production process, wherein, according to the invention, the ammonia is photocatalytically degraded via irradiation with UV radiation. The invention also relates to a device for producing fertiliser particles, containing urea and/or at least one ammonium compound, in particular fertiliser granules, preferably according to this method, comprising a system part having a working chamber, in particular a fertiliser granulator (10), in which the production of the fertiliser particles takes place, and at least one supply line (16) to the system part, with which a urea melt or a concentrated urea solution is directed to the system part, wherein at least one UV lamp assembly (24) is arranged near to at least one supply line, with which the urea melt or concentrated urea solution flowing in the supply line (16) is irradiated with UV radiation. An advantage of the solution according to the invention is that the ammonia waste gas scrubber otherwise required in the known methods and accessories that have taken up a not insignificant amount of space and energy can now optionally be done away with.

Classes IPC  ?

• C05C 1/00 - Engrais de nitrate d'ammonium
• C05C 3/00 - Engrais contenant d'autres sels d'ammonium ou l'ammoniac lui-même, p. ex. ammoniac liquide
• C05C 9/00 - Engrais contenant de l'urée ou ses composés
• C05G 5/12 - Granulés ou flocons

Abrégé

The invention relates to a fluid bed granulator for producing granular materials containing urea or nitrate, said fluid bed granulator comprising at least: - a granulator interior (1) having granulator interior walls (1a), at least comprising a first granulator sidewall (1a.1), a second granulator sidewall (1a.2), a granulator front wall (1a.3) extending in a transverse direction relative to the granulator sidewalls and a granulator rear wall (1a.4), which also extends in the crosswise direction, on the end of the granulator interior (1) opposite the granulator front wall; - a horizontally arranged perforated plate (2) which delimits the bottom of the granulator interior (1); - at least one seed entry opening (3) and at least one granular material exit opening (4); characterized in that - the at least one granular material exit opening (4) is arranged at a distance in front of the granulator rear wall (1a.4). The invention furthermore relates to a method for producing granular materials containing urea or nitrate and to the use of the fluid bed granulator.

Classes IPC  ?

• B01J 2/16 - Procédés ou dispositifs pour la granulation de substances, en généralTraitement de matériaux particulaires leur permettant de s'écouler librement, en général, p. ex. en les rendant hydrophobes par suspension de la substance en poudre dans un gaz, p. ex. sous forme de "lits fluidisés" ou de rideau
• B01J 8/36 - Procédés chimiques ou physiques en général, conduits en présence de fluides et de particules solidesAppareillage pour de tels procédés les particules étant fluidisées selon la technique du "lit fluidisé" le déplacement des particules dans le lit fluidisé étant essentiellement horizontal
• C05C 9/00 - Engrais contenant de l'urée ou ses composés

Abrégé

A fluid-bed granulator system may include a fluid-bed granulator, a scrubber unit, and a connection-duct between an air vent opening of the fluid-bed granulator and the scrubber unit. An inner surface of the connection-duct may be at least partially coated with an anti-adhesion layer. The system may further include a granulator space inside the fluid-bed granulator, a perforated plate disposed inside the granulator space, spray nozzles disposed at the perforated plate, a fluidization air inlet, supply lines for atomization air connected to the spray nozzles, supply lines for a liquid melt connected to the spray nozzles, a granulation seeds inlet, a granulator outlet opening, and an air vent opening. A disclosed urea granulation plant may utilize the fluid-bed granulator system.

Classes IPC  ?

• B01J 2/16 - Procédés ou dispositifs pour la granulation de substances, en généralTraitement de matériaux particulaires leur permettant de s'écouler librement, en général, p. ex. en les rendant hydrophobes par suspension de la substance en poudre dans un gaz, p. ex. sous forme de "lits fluidisés" ou de rideau
• C05C 9/00 - Engrais contenant de l'urée ou ses composés
• C05G 5/12 - Granulés ou flocons

Abrégé

A fluid-bed granulator system with adjustable cooling includes a fluid-bed granulator. A first cooler is externally connected to the fluid-bed granulator or forms an internal part of the fluid-bed granulator. A product screen is connected to the first cooler and the fluid-bed granulator. The product screen includes an exit for final on-size product particles, an exit for oversized particles, and an exit for undersized particles. The exit for the undersized particles is connected to the fluid-bed granulator and the exit for the oversized particles is connected to the fluid-bed granulator via one or more crushers. A recycle cooler is located and connected between the fluid-bed granulator and the exit for undersized particles and/or the recycle cooler is located between the fluid-bed granulator and the exit for the oversized particles. The recycle cooler is connected to the fluid-bed granulator via one or more recycle inlets.

Classes IPC  ?

• B01J 2/16 - Procédés ou dispositifs pour la granulation de substances, en généralTraitement de matériaux particulaires leur permettant de s'écouler librement, en général, p. ex. en les rendant hydrophobes par suspension de la substance en poudre dans un gaz, p. ex. sous forme de "lits fluidisés" ou de rideau
• C05C 9/00 - Engrais contenant de l'urée ou ses composés
• C05G 5/12 - Granulés ou flocons

Abrégé

A urea production plant including a synthesis and recovery section has a first evaporation section connected with the synthesis and recovery section and a first condensation section. A granulation section is connected to the first evaporation section. A scrubbing section is connected to the granulation section. A second evaporation section is connected to the scrubbing section. The second evaporation section is connected to the granulation section. A second condensation section is connected to the second evaporation section. A quenching section includes a liquid inlet for the distribution of a quenching liquid is located and connected between the granulation section and the scrubbing section and the quenching section is connected to a quenching liquid providing section and the second condensation section.

Classes IPC  ?

• C07C 273/16 - SéparationPurification
• B01D 5/00 - Condensation de vapeursRécupération de solvants volatils par condensation
• B01D 9/00 - Cristallisation
• B01D 47/06 - Nettoyage par pulvérisation
• B01D 53/14 - Séparation de gaz ou de vapeursRécupération de vapeurs de solvants volatils dans les gazÉpuration chimique ou biologique des gaz résiduaires, p. ex. gaz d'échappement des moteurs à combustion, fumées, vapeurs, gaz de combustion ou aérosols par absorption
• C05C 9/00 - Engrais contenant de l'urée ou ses composés
• C05G 5/12 - Granulés ou flocons
• C07C 273/04 - Préparation d'urée ou de ses dérivés, c.-à-d. de composés contenant l'un des groupes les atomes d'azote ne faisant pas partie de groupes nitro ou nitroso d'urée, de ses sels, de ses complexes ou de ses composés d'addition à partir de dioxyde de carbone et d'ammoniac
• B01D 47/00 - Séparation de particules dispersées dans l'air, des gaz ou des vapeurs en utilisant un liquide comme agent de séparation

Abrégé

A fluidized bed cooler for cooling a urea-containing granular material may include a cooler chamber having a product inlet opening, a product outlet opening, a perforated plate disposed in the cooler chamber, and at least one cooling medium entry opening disposed beneath the perforated plate. The product inlet opening may be disposed above the perforated plate, and a baffle plate may be disposed between the product inlet opening and the perforated plate. A distributor plate may be disposed between the baffle plate and the perforated plate. An area of the distributor plate may be 10% to 50% greater than an area of the baffle plate.

Classes IPC  ?

• B01J 2/00 - Procédés ou dispositifs pour la granulation de substances, en généralTraitement de matériaux particulaires leur permettant de s'écouler librement, en général, p. ex. en les rendant hydrophobes
• B01J 8/00 - Procédés chimiques ou physiques en général, conduits en présence de fluides et de particules solidesAppareillage pour de tels procédés
• B01J 8/18 - Procédés chimiques ou physiques en général, conduits en présence de fluides et de particules solidesAppareillage pour de tels procédés les particules étant fluidisées
• B01J 8/24 - Procédés chimiques ou physiques en général, conduits en présence de fluides et de particules solidesAppareillage pour de tels procédés les particules étant fluidisées selon la technique du "lit fluidisé"
• B01J 8/34 - Procédés chimiques ou physiques en général, conduits en présence de fluides et de particules solidesAppareillage pour de tels procédés les particules étant fluidisées selon la technique du "lit fluidisé" le lit fluidisé comportant un matériau de remplissage fixe, p. ex. matériaux fragmentés, anneaux métalliques, chicanes
• B01J 19/00 - Procédés chimiques, physiques ou physico-chimiques en généralAppareils appropriés
• B01J 19/24 - Réacteurs fixes sans élément interne mobile
• C05C 3/00 - Engrais contenant d'autres sels d'ammonium ou l'ammoniac lui-même, p. ex. ammoniac liquide
• C05C 9/00 - Engrais contenant de l'urée ou ses composés
• F28D 13/00 - Appareils échangeurs de chaleur utilisant un lit fluidisé

Produits et services

Chemical additives for the manufacture of fertilising prills and granules; non-stick coatings, namely chemicals for non-stick purposes for coating the inside of containers as parts of granulators [machines]. Granulators [machines] with spray nozzles for the fluidised granulation of fertilisers. Construction planning and technical planning of chemical plants, namely fluidised granulation plants.

Produits et services

Chemical additives for the manufacture of fertilizer prills and granules; non-stick coating, namely chemical products for non-stick purposes for coating the inside of containers as parts of granulators [machines]. Granulators [machines] with spray nozzles for fluidised bed granulation of fertilizers. Construction and technical design of chemical plants, namely fluidised bed granulation plants.

Produits et services

Chemical additives for the manufacture of fertilising prills and granules; Non-stick coatings, Namely chemicals for non-stick purposes for coating the inside of containers as parts of granulators [machines]. Granulators [machines] with spray nozzles for the fluidised granulation of fertilisers. Construction planning and technical planning of chemical plants, namely fluidised granulation plants.

Abrégé

The invention relates to a fluid-bed granulator system for producing fertilizer granules with a defined size at least comprising: a.) a fluid-bed granulator, b.) a first cooler externally connected with the fluid-bed granulator or forming an internal part of the fluid-bed granulator, c.) a product screen connected with the first cooler wherein the product screen at least comprises: - an exit for on-size particles; - an exit for oversized particles; and - an exit for undersized particles; c.1) wherein the exit for undersized particles is connected with the fluid- bed granulator and wherein the exit for oversized particles is connected with the fluid-bed granulator via one or more crushers; c.2) wherein the exit for on-size particles is connected with a first splitter and wherein the first splitter is connected with the fluid-bed granulator and a post processing unit; and wherein a particle size analyzer is located between the fluid-bed granulator and the product screen.

Classes IPC  ?

• C05G 5/12 - Granulés ou flocons
• B02C 23/10 - Séparation ou triage de matériaux, associé au broyage ou à la désagrégation au moyen d'un séparateur situé dans le passage de décharge de la zone de broyage ou de désagrégation
• B02C 23/14 - Séparation ou triage de matériaux, associé au broyage ou à la désagrégation au moyen de plusieurs séparateurs
• C05C 9/00 - Engrais contenant de l'urée ou ses composés

Abrégé

A process for purifying exhaust air from a granulation plant for producing a urea-containing granulate includes contacting a gas stream containing a urea-containing dust and ammonia with a sulfuric acid solution or a nitric acid solution in a scrubbing process. The scrubbing process involves scrubbing the gas stream with a first weakly acidic scrubbing solution in a first scrubbing stage and scrubbing the gas stream exiting the first scrubbing stage with a second scrubbing solution having a lower pH than the first weakly acidic scrubbing solution in a second scrubbing stage. The acidic scrubbing solution generated in the second scrubbing stage may be recycled into the first scrubbing stage via a conduit and used therein as the first weakly acidic scrubbing solution. A pre-scrubbing stage for scrubbing dust out of the gas stream may additionally be arranged upstream of the first scrubbing stage.

Classes IPC  ?

• B01D 47/12 - Laveurs à sections de lavage différentes
• B01D 53/58 - Ammoniac
• B01D 53/75 - Procédés multi-étapes
• B01D 53/78 - Procédés en phase liquide avec un contact gaz-liquide
• C07C 273/16 - SéparationPurification

Abrégé

The invention relates to a spray nozzle for the production of urea fertilizer granules and/or urea-sulfur fertilizer granules, at least comprising a conveying channel and an atomizing gas channel, wherein the conveying channel has at least one separating pin and the atomizing channel has at least one swirl element and the swirl elements comprise inserts, cutouts and moving and fixed elements. The invention further comprises a fluidized bed granulator with a spray nozzle for production of a urea-sulfur fertilizer, a process for producing a urea-sulfur, fertilizer, and the use of the spray nozzle for production of fertilizer granules.

Classes IPC  ?

• B01J 2/16 - Procédés ou dispositifs pour la granulation de substances, en généralTraitement de matériaux particulaires leur permettant de s'écouler librement, en général, p. ex. en les rendant hydrophobes par suspension de la substance en poudre dans un gaz, p. ex. sous forme de "lits fluidisés" ou de rideau
• B05B 7/06 - Pistolets pulvérisateursAppareillages pour l'évacuation avec un orifice de sortie en entourant un autre situé approximativement dans le même plan
• B05B 7/10 - Pistolets pulvérisateursAppareillages pour l'évacuation produisant une turbulence à la sortie
• C05C 9/00 - Engrais contenant de l'urée ou ses composés

Abrégé

The invention relates to a spray nozzle (1) for producing a urea fertilizer granulate and/or a urea-sulfur fertilizer granulate, at least comprising a delivery channel (5) and an atomizing gas channel (6). The invention is characterized in that the delivery channel (5) has at least one separating pin (7), and the atomizing channel (6) has at least one turbulence element (8), said turbulence elements (8) comprising inserts, recesses, and movable and fixed elements. The invention additionally relates to a fluidized bed granulator with a spray nozzle for producing a urea-suflur fertilizer, to a method for producing a urea-sulfur fertilizer, and to the use of the spray nozzle for producing a fertilizer granulate.

Classes IPC  ?

• B01J 2/16 - Procédés ou dispositifs pour la granulation de substances, en généralTraitement de matériaux particulaires leur permettant de s'écouler librement, en général, p. ex. en les rendant hydrophobes par suspension de la substance en poudre dans un gaz, p. ex. sous forme de "lits fluidisés" ou de rideau
• B05B 7/06 - Pistolets pulvérisateursAppareillages pour l'évacuation avec un orifice de sortie en entourant un autre situé approximativement dans le même plan
• B05B 7/10 - Pistolets pulvérisateursAppareillages pour l'évacuation produisant une turbulence à la sortie
• C05C 9/00 - Engrais contenant de l'urée ou ses composés

Produits et services

Chemical additives for the manufacture of fertilizer prills and granules; chemicals used in industry as a non-stick coating, namely, chemicals for coating the inside of granulator machine parts in the nature of containers Granulators being machines with spray nozzles for fluidised bed granulation of fertilizers Technical design of chemical plants, namely, fluidised bed granulation plants

Abrégé

The invention relates to a Fluid-bed granulator system with adjustable cooling setup at least comprising: a.) a fluid-bed granulator (1), b.) a first cooler (2) externally connected with the fluid-bed granulator (1) or forming an internal part of the fluid-bed granulator (1), c.) a product screen (3) connected with the first cooler (2) and the fluid-bed granulator (1), wherein the product screen (3) at least comprises an exit for final on-size product particles (3a) and an exit for oversized particles (3b) and an exit for undersized particles (3c), wherein the exit for the undersized particles (3c) is connected with the fluid-bed granulator (1) and wherein the exit for the oversized particles (3b) is connected with the fluid-bed granulator (1) via one or more crushers (4), - wherein a recycle cooler (6) is located and connected between the fluid-bed granulator (1) and the exit for undersized particles (3c); and/or - wherein the recycle cooler (6) is located between the fluid-bed granulator (1) and the exit for the oversized particles (3b); and wherein the recycle cooler (6) is connected with the fluid-bed granulator via one or two or more recycle inlets (16).

Classes IPC  ?

• B01J 2/16 - Procédés ou dispositifs pour la granulation de substances, en généralTraitement de matériaux particulaires leur permettant de s'écouler librement, en général, p. ex. en les rendant hydrophobes par suspension de la substance en poudre dans un gaz, p. ex. sous forme de "lits fluidisés" ou de rideau
• C05G 3/00 - Mélanges d'un ou plusieurs engrais avec des additifs n'ayant pas une activité spécifique d'engrais
• C05C 9/00 - Engrais contenant de l'urée ou ses composés

Abrégé

Disclosed is a urea production plant at least comprising a. a synthesis and recovery section; b. a first evaporation section connected with the synthesis and recovery section and a first condensation section; c. a granulation section connected with the first evaporation section; d. a scrubbing section connected with the granulation section; e. a second evaporation section connected with the scrubbing section and wherein the second evaporation section is connected with the granulation section , f. a second condensation section connected with the second evaporation section ; g. a quenching section comprising a liquid inlet for the distribution of a quenching liquid, located and connected between the granulation section and the scrubbing section and wherein the quenching section is connected with a quenching liquid providing section and the second condensation section.

Classes IPC  ?

• C05C 9/00 - Engrais contenant de l'urée ou ses composés
• B01D 47/00 - Séparation de particules dispersées dans l'air, des gaz ou des vapeurs en utilisant un liquide comme agent de séparation
• B01J 2/00 - Procédés ou dispositifs pour la granulation de substances, en généralTraitement de matériaux particulaires leur permettant de s'écouler librement, en général, p. ex. en les rendant hydrophobes

Abrégé

The invention relates to a urea production plant at least comprising a. a synthesis and recovery section (1); b. a first evaporation section (2) connected with the synthesis and recovery section (1) and a first condensation section (6); c. a granulation section (3) connected with the first evaporation section (2); d. a scrubbing section (4) connected with the granulation section (3) e. a second evaporation section (5) connected with the scrubbing section (4) and wherein the second evaporation section (5) is connected with the granulation section (3), f. a second condensation section (7) connected with the second evaporation section (5); g. a quenching section (8) comprising a liquid inlet for the distribution of a quenching liquid, located and connected between the granulation section (3) and the scrubbing section (4) and wherein the quenching section (8) is connected with a quenching liquid providing section (10) and the second condensation section (7).

Classes IPC  ?

• C05C 9/00 - Engrais contenant de l'urée ou ses composés
• B01J 2/00 - Procédés ou dispositifs pour la granulation de substances, en généralTraitement de matériaux particulaires leur permettant de s'écouler librement, en général, p. ex. en les rendant hydrophobes
• B01D 47/00 - Séparation de particules dispersées dans l'air, des gaz ou des vapeurs en utilisant un liquide comme agent de séparation

Abrégé

The invention comprises a fluidized bed granulator for granulating urea-containing substances, comprising a perforated plate (2), characterized in that the perforated plate (2) has a non-stick coating (6). The fluidized bed granulator comprises: a granulator chamber (1), the perforated plate (2) arranged in the granulator chamber (1), spray nozzles (3) arranged in, on or separate from the perforated plate (2), atomization gas feed conduits (4) connected to the spray nozzles (3) and melt feed conduits (10), a fluidization gas feed conduit (5), a seed particle feed conduit (7), a granulator discharge conduit (9) and a venting opening (8), and the non-stick coating (6) comprises organic silicon compounds, polyalkylsilicon compounds, polyarylsilicon compounds, polyallylsilicon compounds, a mixed compound composed of alkyl-, aryl- and allylsilicon compounds and mixtures thereof. The invention further provides a fluidized bed granulation system according to the invention.

Classes IPC  ?

• B01J 2/16 - Procédés ou dispositifs pour la granulation de substances, en généralTraitement de matériaux particulaires leur permettant de s'écouler librement, en général, p. ex. en les rendant hydrophobes par suspension de la substance en poudre dans un gaz, p. ex. sous forme de "lits fluidisés" ou de rideau
• C05C 9/00 - Engrais contenant de l'urée ou ses composés

Abrégé

The invention relates to a fluid-bed granulator system at least comprising a fluid bed granulator (9) with a perforated plate (2) located inside the granulator space (1), wherein the perforated plate (2) comprises at least two inner perforated plates (2a, 2a') and wherein the two inner perforated plates (2a, 2a') are connected via a middle part bar (2c) and wherein a central support tube (2d) is arranged between the middle part bar (2c) and a granulator ground floor (10) and wherein the fluid bed granulator (9) comprises a granulator space (1) inside the fluid-bed granulator (14), the perforated plate (2) located inside the granulator space (1), spray nozzles (3) located in, on or beside the perforated plate (2), fluidization air inlet (11), supply lines for atomization air (4) connected to the spray nozzles (3), supply lines for a liquid melt (5) connected to the spray nozzles (3), a granulation seeds inlet (6), a granulator outlet opening (7) and an air vent opening (8).

Classes IPC  ?

• B01J 2/16 - Procédés ou dispositifs pour la granulation de substances, en généralTraitement de matériaux particulaires leur permettant de s'écouler librement, en général, p. ex. en les rendant hydrophobes par suspension de la substance en poudre dans un gaz, p. ex. sous forme de "lits fluidisés" ou de rideau
• B01J 8/36 - Procédés chimiques ou physiques en général, conduits en présence de fluides et de particules solidesAppareillage pour de tels procédés les particules étant fluidisées selon la technique du "lit fluidisé" le déplacement des particules dans le lit fluidisé étant essentiellement horizontal
• B01J 8/44 - Grilles de fluidisation

Abrégé

The invention relates to a fluid-bed granulator system at least comprising a fluid-bed granulator (14),a scrubber unit (9) and a connection-duct (10) between an air vent opening (8) of the fluid-bed granulator (14) and the scrubber unit (9), wherein an inner surface of the connection-duct (10) is at least partially coated with an anti-adhesion layer (11). The invention further relates to a urea granulation plant and the use of the Fluid-bed granulator system.

Classes IPC  ?

• B01J 2/16 - Procédés ou dispositifs pour la granulation de substances, en généralTraitement de matériaux particulaires leur permettant de s'écouler librement, en général, p. ex. en les rendant hydrophobes par suspension de la substance en poudre dans un gaz, p. ex. sous forme de "lits fluidisés" ou de rideau

Abrégé

The invention comprises a fluidized bed cooler for cooling urea-containing granules, at least comprising a cooler chamber (1) with a product entry opening (2), a product exit opening (3), a perforated plate (4) arranged in the cooler chamber (1) and at least one cooling medium inlet opening (7) arranged underneath the perforated plate (4), characterized in that the product entry opening (2) is arranged above the perforated plate (4) and a baffle (5) is arranged between the product entry opening (2) and the perforated plate (4).

Classes IPC  ?

• C05C 3/00 - Engrais contenant d'autres sels d'ammonium ou l'ammoniac lui-même, p. ex. ammoniac liquide
• F28C 3/16 - Autres appareils échangeurs de chaleur à contact direct une des sources de potentiel calorifique au moins étant un solide fluent, p. ex. un matériau sous forme de particules les sources de potentiel calorifique étant un matériau sous forme de particules d'une part, un gaz, une vapeur ou un liquide d'autre part le matériau sous forme de particules formant un lit, p. ex. fluidifié, sur des tamis à secousses

Abrégé

A particulate, urea-containing composition and use of an additive for producing a particulate, urea-containing composition and methods of producing a particulate, urea-containing composition.

Classes IPC  ?

• C05D 9/00 - Autres engrais inorganiques
• C05C 3/00 - Engrais contenant d'autres sels d'ammonium ou l'ammoniac lui-même, p. ex. ammoniac liquide
• C05C 9/00 - Engrais contenant de l'urée ou ses composés
• A23K 50/15 - Produits alimentaires spécialement conçus pour des animaux spécifiques pour les ruminants contenant des substances transformées métaboliquement en protéines, p. ex. des sels d’ammonium ou de l'urée
• C05G 3/20 - Mélanges d'un ou plusieurs engrais avec des additifs n'ayant pas une activité spécifique d'engrais pour éviter que les engrais soient réduits en poudreAdditifs anti-poussière
• C05G 5/12 - Granulés ou flocons
• B01J 2/16 - Procédés ou dispositifs pour la granulation de substances, en généralTraitement de matériaux particulaires leur permettant de s'écouler librement, en général, p. ex. en les rendant hydrophobes par suspension de la substance en poudre dans un gaz, p. ex. sous forme de "lits fluidisés" ou de rideau
• A23K 40/10 - Mise en forme ou traitement des produits alimentaires pour animaux par agglomérationMise en forme ou traitement des produits alimentaires pour animaux par granulation, p. ex. fabrication de poudres
• A23K 20/10 - Substances organiques
• B01J 2/02 - Procédés ou dispositifs pour la granulation de substances, en généralTraitement de matériaux particulaires leur permettant de s'écouler librement, en général, p. ex. en les rendant hydrophobes par division du produit liquide en gouttelettes, p. ex. par pulvérisation, et solidification des gouttelettes
• C01C 1/24 - Sulfates d'ammonium
• C07C 47/12 - Composés saturés comportant des groupes —CHO liés à des atomes de carbone acycliques ou à de l'hydrogène contenant plus d'un groupe —CHO
• C07C 55/02 - Acides dicarboxyliques
• C07C 55/22 - Acides tricarboxyliques
• C08L 29/04 - Alcool polyvinyliqueHomopolymères ou copolymères d'esters partiellement hydrolysés d'alcools non saturés avec des acides carboxyliques saturés
• C08L 39/02 - Homopolymères ou copolymères de la vinylamine
• C08L 79/02 - Polyamines

Abrégé

Disclosed is a process for purifying the exhaust air from a granulation plant for producing a urea- containing granulate wherein a gas stream containing a urea-containing dust and ammonia is contacted with a sulfuric acid solution or a nitric acid solution in a scrubbing process, wherein the scrubbing process comprises at least two separate sequential scrubbing stages. Accordingly, an acidic scrubbing solution generated in the second scrubbing stage may be recycled into the first scrubbing stage via a conduit and used therein as a first weakly acidic scrubbing solution. A pre-scrubbing stage in which a substantial proportion of the dust is scrubbed out of the gas stream may additionally be arranged upstream of the first scrubbing stage.

Classes IPC  ?

• B01D 53/58 - Ammoniac
• B01D 47/06 - Nettoyage par pulvérisation
• B01D 53/78 - Procédés en phase liquide avec un contact gaz-liquide
• C07C 273/16 - SéparationPurification

Abrégé

The invention relates to a method for cleaning the exhaust air of a granulating system for producing a urea-containing granulate. A gas flow which contains a urea-containing dust and ammonia is brought into contact with a sulfuric acid solution or a nitric acid solution in a scrubbing process, wherein the scrubbing process has at least two separate scrubbing stages (16, 18) which follow each other, the gas flow is scrubbed in a first scrubbing stage (16) with a first weakly acidic scrubbing solution, and the gas flow which leaves the first scrubbing stage is scrubbed in a second scrubbing stage (19) with a second scrubbing solution which has a lower pH value than the first weakly acidic scrubbing solution. According to the invention, the acidic scrubbing solution which accumulates in the second scrubbing stage (19) can be returned to the first scrubbing stage (16) via a line (17) and used as the first weakly acidic scrubbing solution there. The first scrubbing stage (16) can additionally be arranged upstream of a pre-scrubber (11) in which a substantial content of the dust is scrubbed out of the gas flow.

Classes IPC  ?

• B01D 53/58 - Ammoniac
• B01D 47/06 - Nettoyage par pulvérisation
• B01D 53/78 - Procédés en phase liquide avec un contact gaz-liquide
• C07C 273/16 - SéparationPurification

Abrégé

The invention relates to a method for producing an NOx reductant AUS 32 solution (diesel exhaust fluid) comprising at least the mixing of water and a particulate composition containing (i) urea; and an additive comprising component (ii): (ii) combination of at least one polymer or oligomer containing amino groups and at least one functionalized polyvinyl compound; wherein the weight percentage of component (i) in the particulate composition is greater than 60 wt% and the weight percentage of component (ii) in the particulate composition is less than 1 wt% and wherein a urea solution is obtained and the weight percentage of component (i) in the obtained urea solution is between 31 wt% and 34 wt%.

Classes IPC  ?

• B01D 53/86 - Procédés catalytiques
• B01D 53/94 - Épuration chimique ou biologique des gaz résiduaires des gaz d'échappement des moteurs à combustion par des procédés catalytiques
• C05C 9/00 - Engrais contenant de l'urée ou ses composés

Abrégé

The invention relates to a method for producing an NOx reductant AUS 32 solution (diesel exhaust fluid) comprising at least the mixing of water and a particulate composition containing (i) urea; and an additive comprising component (ii): (ii) combination of at least one polymer or oligomer containing amino groups and at least one functionalized polyvinyl compound; wherein the weight percentage of component (i) in the particulate composition is greater than 60 wt% and the weight percentage of component (ii) in the particulate composition is less than 1 wt% and wherein a urea solution is obtained and the weight percentage of component (i) in the obtained urea solution is between 31 wt% and 34 wt%.

Classes IPC  ?

• B01D 53/86 - Procédés catalytiques
• B01D 53/94 - Épuration chimique ou biologique des gaz résiduaires des gaz d'échappement des moteurs à combustion par des procédés catalytiques
• B01F 3/12 - Mélange, p.ex. dispersion, émulsion, selon les phases à mélanger de liquides avec des solides
• C01C 1/08 - Préparation d'ammoniac à partir de substances organiques azotées
• C05G 3/00 - Mélanges d'un ou plusieurs engrais avec des additifs n'ayant pas une activité spécifique d'engrais
• C07C 273/02 - Préparation d'urée ou de ses dérivés, c.-à-d. de composés contenant l'un des groupes les atomes d'azote ne faisant pas partie de groupes nitro ou nitroso d'urée, de ses sels, de ses complexes ou de ses composés d'addition
• F01N 3/20 - Silencieux ou dispositifs d'échappement comportant des moyens pour purifier, rendre inoffensifs ou traiter les gaz d'échappement pour rendre les gaz d'échappement inoffensifs par conversion thermique ou catalytique des composants nocifs des gaz d'échappement caractérisés par les méthodes d'opérationCommande spécialement adaptés à la conversion catalytique

Abrégé

The invention relates to a particulate composition comprising (i) urea; and an additive comprising one or both of components (ii) and (iii): (ii) combination of at least one polymer or oligomer containing amino groups and at least one functionalized polyvinyl compound; (iii) at least one aliphatic C2- C8 dialdehyde; and an additional material comprising one or more components (iv) to (vi): (iv) sulfur; (v) ammonium sulfate; (vi) at least one trace element; where the proportion by weight of component (i) is > 10% by weight and the proportion by weight of the sum total of components (ii) and (iii) in the composition is < 1% by weight, to the use of this additive for production of the particulate, urea-containing composition, and to the process and the apparatuses for production of the composition and the use thereof as a fertilizer.

Classes IPC  ?

• C05C 9/00 - Engrais contenant de l'urée ou ses composés
• C07C 273/14 - SéparationPurificationStabilisationEmploi d'additifs
• C05G 3/00 - Mélanges d'un ou plusieurs engrais avec des additifs n'ayant pas une activité spécifique d'engrais
• B01J 2/30 - Procédés ou dispositifs pour la granulation de substances, en généralTraitement de matériaux particulaires leur permettant de s'écouler librement, en général, p. ex. en les rendant hydrophobes en utilisant des agents empêchant le collage des granules entre euxTraitement de matériaux particulaires leur permettant de s'écouler librement, en général, p. ex. en les rendant hydrophobes