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Patent Agency Ranking
公开(公告)号：US20170320816A1
公开(公告)日：2017-11-09
申请号：US15495667
申请日：2017-04-24
Applicant: Stamicarbon B.V.
Inventor： Brian Sayre HIGGINS , John Marshall TATE, III , Robert Arthur YATES , Marcel Julien POMERLEAU , Jon Michael HEON , Wilfried Marc Renaat DIRKX , Juan Coloma GONZÁLEZ
IPC: C07C273/16 , B01D47/10 , B01D47/06 , B01D47/12 , B01D47/05
Abstract: Disclosed are methods and systems for removing submicron particles from a gas stream, in particular from urea prilling off-gas, wherein a Venturi ejector is used. A method comprises contacting a gas stream containing submicron particles in a Venturi ejector with an injected high velocity scrubbing liquid to provide a pumping action, wherein the scrubbing liquid has an initial velocity of at least 25 m/s and wherein the ratio of scrubbing liquid and gas flow is between 0.0005 and 0.0015 (m3/h)/(m3/h).
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公开(公告)号：US20190224610A1
公开(公告)日：2019-07-25
申请号：US16300434
申请日：2017-05-09
Applicant: Stamicarbon B.V.
Inventor： Brian Sayre HIGGINS , John Marshall TATE, III , Robert Arthur YATES , Marcel Julien POMERLEAU , Jon Michael HEON , Wilfried Marc Renaat DIRKX , Juan Coloma González
Abstract: Disclosed are methods and systems for removing submicron particles from a gas stream, in particular from urea prilling off-gas, wherein a Venturi ejector is used. A method comprises contacting a gas stream containing submicron particles in a Venturi ejector with an injected high velocity scrubbing liquid to provide a pumping action, wherein the scrubbing liquid has an initial velocity of at least 2 m/s and wherein the ratio of scrubbing liquid and gas flow is between 0.0005 and 0.0015 (m3/h)/(m3/h). The disclosure also pertains to a prilling tower having a gas stream treatment system comprising a Venturi ejector at the top of the prilling tower, and to a method of modifying an existing prilling tower.
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公开(公告)号：US20210245089A1
公开(公告)日：2021-08-12
申请号：US17273813
申请日：2020-05-22
Applicant: STAMICARBON B.V.
Inventor： Giusy Elisa PUCI , Wilfried Marc Renaat DIRKX
Abstract: Disclosed is a urea finishing method including an off-gas treatment, the method comprising urea finishing and supplying the off-gas to a quenching zone and to a scrub column comprising a sump and a venturi stage, wherein the sump has a split sump configuration with two compartments.
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公开(公告)号：US20190134554A1
公开(公告)日：2019-05-09
申请号：US16236097
申请日：2018-12-28
Applicant: Stamicarbon B.V.
IPC: B01D47/10 , B01D47/06 , C07C273/02
Abstract: Disclosed is a method for the removal of urea dust from the off-gas of a finishing section of a urea production plant. the method comprises subjecting the off-gas to quenching with water so as to produce quenched off-gas, and subjecting the quenched off-gas to scrubbing using at least one venturi scrubber. 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：US20160184758A1
公开(公告)日：2016-06-30
申请号：US14902831
申请日：2014-07-04
Applicant: STAMICARBON B.V.
IPC: B01D47/10
CPC classification number: B01D47/10 , B01D47/06 , 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.
Abstract translation: 公开了一种从尿素生产设备的精加工部分（1）的废气中除去尿素灰尘的方法，该方法包括使废气用水淬火（06），以产生骤冷的， 气体，并使用至少一个文丘里洗涤器（11）对骤冷的废气进行洗涤。 因此，可以获得比洗涤器更低的压降，更有效地生长尿素颗粒，便于其去除。
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