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公开(公告)号：AU2016291068A1
公开(公告)日：2018-01-25
申请号：AU2016291068
申请日：2016-07-06
Applicant: STAMICARBON
Abstract: Disclosed is a method of making a granulate of a urea product comprising urea and a salt, such as urea ammonium sulfate, having a high content of the salt. The high content is such as to provide an amount of the salt above the limit of solubility of the salt in urea. The granulate of the invention is characterized by having a smooth surface, which, e.g. in the event of urea ammonium sulfate, is not normally the case for granulate having the aforementioned high ammonium sulfate content. According to the invention this is realized by dividing the feed liquids to granulation. This division is based on non-final granulation liquids of a sufficiently high content of the salt, and a final granulation liquid (determining the surface) having a salt content of below the solubility limit of the salt, or no salt at all. E.g. in the event of urea ammonium sulfate, the non-final granulation liquids possibly are a slurry of urea and more than 20 wt.% of ammonium sulfate. The final granulation liquid then has 0-20 wt.% of ammonium sulfate, i.e. below the solubility limit.
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公开(公告)号：AU2014284776B2
公开(公告)日：2018-01-18
申请号：AU2014284776
申请日：2014-07-04
Applicant: STAMICARBON
IPC: B01D47/06 , B01D47/10 , C07C273/02
Abstract: Disclosed is a method for the removal of urea dust from the off- gas of a finishing section (1) of a urea production plant, the method comprises subjecting the off-gas to quenching with water (06) so as to produce quenched off-gas, and subjecting the quenched off-gas to scrubbing using at least one venturi scrubber (11). As a result, a lower pressure drop over the scrubber is attained, and a more efficient growth of urea particles, facilitating the removal thereof.
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公开(公告)号：HRP20180430T1
公开(公告)日：2018-05-04
申请号：HRP20180430
申请日：2018-03-13
Applicant: STAMICARBON
IPC: B01D47/06 , B01D47/10 , C07C273/02
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Patent Agency Ranking
公开(公告)号：CA2917304A1
公开(公告)日：2015-01-08
申请号：CA2917304
申请日：2014-07-04
Applicant: STAMICARBON
IPC: B01D47/06 , B01D47/10 , C07C273/02
Abstract: Disclosed is a method for the removal of urea dust from the off- gas of a finishing section (1) of a urea production plant, the method comprises subjecting the off-gas to quenching with water (06) so as to produce quenched off-gas, and subjecting the quenched off-gas to scrubbing using at least one venturi scrubber (11). As a result, a lower pressure drop over the scrubber is attained, and a more efficient growth of urea particles, facilitating the removal thereof.
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公开(公告)号：CA2917304C
公开(公告)日：2020-09-15
申请号：CA2917304
申请日：2014-07-04
Applicant: STAMICARBON
IPC: B01D47/06 , B01D47/10 , C07C273/02
Abstract: Disclosed is a method for the removal of urea dust from the off- gas of a finishing section (1) of a urea production plant, the method comprises subjecting the off-gas to quenching with water (06) so as to produce quenched off-gas, and subjecting the quenched off-gas to scrubbing using at least one venturi scrubber (11). As a result, a lower pressure drop over the scrubber is attained, and a more efficient growth of urea particles, facilitating the removal thereof.
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公开(公告)号：AU2016291068B2
公开(公告)日：2019-11-28
申请号：AU2016291068
申请日：2016-07-06
Applicant: STAMICARBON
Abstract: Disclosed is a method of making a granulate of a urea product comprising urea and a salt, such as urea ammonium sulfate, having a high content of the salt. The high content is such as to provide an amount of the salt above the limit of solubility of the salt in urea. The granulate of the invention is characterized by having a smooth surface, which, e.g. in the event of urea ammonium sulfate, is not normally the case for granulate having the aforementioned high ammonium sulfate content. According to the invention this is realized by dividing the feed liquids to granulation. This division is based on non-final granulation liquids of a sufficiently high content of the salt, and a final granulation liquid (determining the surface) having a salt content of below the solubility limit of the salt, or no salt at all. E.g. in the event of urea ammonium sulfate, the non-final granulation liquids possibly are a slurry of urea and more than 20 wt.% of ammonium sulfate. The final granulation liquid then has 0-20 wt.% of ammonium sulfate, i.e. below the solubility limit.
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公开(公告)号：EA030594B1
公开(公告)日：2018-08-31
申请号：EA201690164
申请日：2014-07-04
Applicant: STAMICARBON
IPC: B01D47/06 , B01D47/10 , C07C273/02
Abstract: Раскрытспособудаленияпыликарбамидаизотходящегогазадоводочнойсекции (1) установкипопроизводствукарбамида, причемспособвключаетвыполнениегашенияотходящегогазаводой (06) сполучениемгашеногоотходящегогазаи выполнениеочисткигашеногоотходящегогазаприпомощипоменьшеймереодногоскруббераВентури (11). Врезультатеэтогодостигаетсяменьшеепадениедавлениянаскруббереи болееэффективныйростчастицкарбамида, чтоупрощаетихудаление.
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公开(公告)号：CA2991280A1
公开(公告)日：2017-01-12
申请号：CA2991280
申请日：2016-07-06
Applicant: STAMICARBON
Abstract: Disclosed is a method of making a granulate of a urea product comprising urea and a salt, such as urea ammonium sulfate, having a high content of the salt. The high content is such as to provide an amount of the salt above the limit of solubility of the salt in urea. The granulate of the invention is characterized by having a smooth surface, which, e.g. in the event of urea ammonium sulfate, is not normally the case for granulate having the aforementioned high ammonium sulfate content. According to the invention this is realized by dividing the feed liquids to granulation. This division is based on non-final granulation liquids of a sufficiently high content of the salt, and a final granulation liquid (determining the surface) having a salt content of below the solubility limit of the salt, or no salt at all. E.g. in the event of urea ammonium sulfate, the non-final granulation liquids possibly are a slurry of urea and more than 20 wt.% of ammonium sulfate. The final granulation liquid then has 0-20 wt.% of ammonium sulfate, i.e. below the solubility limit.
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