公开(公告)号：US10828593B2

公开(公告)日：2020-11-10

申请号：US16236097

申请日：2018-12-28

Applicant: Stamicarbon B.V.

Inventor： Petrus Catharina Gerlach Soons ,  Wilfried Marc Renaat Dirkx

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 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.

公开(公告)号：US10730002B2

公开(公告)日：2020-08-04

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: B01D47/05 ,  B01D47/06 ,  B01D47/10 ,  B01D47/12 ,  B01D53/40 ,  B01D53/58 ,  B01D53/79 ,  C07C273/16 ,  B01J2/04 ,  C05C9/00

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).

公开(公告)号：US11241649B2

公开(公告)日：2022-02-08

申请号：US17273813

申请日：2020-05-22

Applicant: STAMICARBON B.V.

Inventor： Giusy Elisa Puci ,  Wilfried Marc Renaat Dirkx

IPC: B01D47/05 ,  B01D47/06 ,  B01D47/10 ,  B01D47/12 ,  B01D53/58 ,  B01D53/78 ,  B01J2/16 ,  C07C273/16

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.

公开(公告)号：US10207216B2

公开(公告)日：2019-02-19

申请号：US14902831

申请日：2014-07-04

Applicant: Stamicarbon B.V.

Inventor： Petrus Catharina Gerlach Soons ,  Wilfried Marc Renaat Dirkx

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 (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.