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US 12,233,394 B2Granted
Method and fluidized bed granulator for the production of granules from a slurry
AssigneeYara International Asa
InventorHoward Volke
Life of this patent
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AssigneeYara International Asa
InventorHoward Volke
Estimating the term…
A method for granulating a slurry in a fluidized bed granulator having a main longitudinal direction from a seed end where granulation is initiated, to a product discharge end where granules are discharged from the fluidized bed granulator, including at least one fluidized bed compartment, an injection section and a granulation section, separated by a bottom plate including one or more injection nozzles, wherein a feed slurry is provided to the injection section, wherein a first fraction of the feed slurry provided to the injection section is injected into the granulation section through the one or more injection nozzles and a second fraction of the feed slurry, being the remainder of the feed slurry, is passed through the injection section without being injected into the granulation section. A fluidized bed granulator for the granulation of slurries for fertilizer products such as UAS according to the method of the invention.
A method for production of fertilizer granules by granulating a feed slurry in a fluidized bed granulator having a main longitudinal direction from a seed end where granulation is initiated, to a product discharge end where the fertilizer granules are discharged from the fluidized bed granulator, comprising at least one fluidized bed compartment, an injection section and a granulation section, separated by a bottom plate comprising one or more injection nozzles, wherein the feed slurry is provided to the injection section of the fluidized bed granulator, characterized in that a first fraction of the feed slurry provided to the injection section is injected into the granulation section through the one or more injection nozzles and a second fraction of the feed slurry, being a remainder of the feed slurry, is continuously passed through the injection section without being injected into the granulation section and is continuously returned to the injection section after it is mixed with the feed slurry, wherein the feed slurry maintains a predetermined minimum velocity within the injection section of the fluidized bed granulator.
A method for reducing clogging of an injection section in a fluidized bed granulator for production of fertilizer granules, comprising at least one fluidized bed compartment having a main longitudinal direction from a seed end where granulation is initiated, to a product discharge end where granules are discharged from the fluidized bed granulator, an injection section and a granulation section, separated by a bottom plate comprising one or more injection nozzles, wherein a feed slurry is provided to the injection section of the fluidized bed granulator, characterized in that a first fraction of the feed slurry, provided to the injection section, is injected into the granulation section through the one or more injection nozzles and a second fraction of the feed slurry, being a remainder of the feed slurry, is continuously passed through the injection section without being injected into the granulation section and is continuously returned to the injection section after it is mixed with the feed slurry, wherein the feed slurry maintains a predetermined minimum velocity within the injection section of the fluidized bed granulator.
A method for production of fertilizer granules by granulating a feed slurry in a fluidized bed granulator having a main longitudinal direction from a seed end where granulation is initiated, to a product discharge end where the fertilizer granules are discharged from the fluidized bed granulator, comprising at least one fluidized bed compartment, an injection section and a granulation section, separated by a bottom plate comprising one or more injection nozzles, wherein the feed slurry is provided to the injection section of the fluidized bed granulator, characterized in that a first fraction of the feed slurry provided to the injection section is injected into the granulation section through the one or more injection nozzles and a second fraction of the feed slurry, being a remainder of the feed slurry, is continuously passed through the injection section without being injected into the granulation section and is continuously returned to the injection section after it is mixed with the feed slurry, wherein the first fraction of the feed slurry ranges between 70% and 99% of the total feed slurry.
Dependencies are inferred from the claim text.