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：US12083468B2

公开(公告)日：2024-09-10

申请号：US17684716

申请日：2022-03-02

Applicant: Stamicarbon B.V.

Inventor： Brian Sayre Higgins

IPC: B01D47/12 ,  B01D47/05 ,  B01D47/06 ,  B01D47/10 ,  B03C3/013 ,  C07C273/16 ,  B01D53/58

CPC classification number: B01D47/12 ,  B01D47/05 ,  B01D47/06 ,  B01D47/10 ,  B03C3/013 ,  C07C273/16 ,  B01D53/58 ,  B01D2247/04 ,  B01D2247/102 ,  B01D2247/103 ,  B01D2247/107 ,  B01D2251/506 ,  B01D2252/103

Abstract: Disclosed is a method for the removal of soluble particulate matter from a gas stream, such as urea dust from the off-gas of a finishing section of a urea production plant. The method comprises subjecting the off-gas to at least two quenching stages an aqueous quenching liquid. The quenching liquid used in a first, upstream quench stage, is allowed to have a higher concentration of dissolved particulate matter than the quenching liquid in the second, downstream quench stage. The quenched gas is led through a particle capture zone, typically comprising one or more of a wet scrubber, a Venturi scrubber, and a wet electrostatic precipitator.

公开(公告)号：US11298646B2

公开(公告)日：2022-04-12

申请号：US15036714

申请日：2014-11-14

Applicant: Stamicarbon B.V.

Inventor： Brian Sayre Higgins

IPC: B01D47/12 ,  B01D47/10 ,  B01D47/06 ,  C07C273/16 ,  B01D47/05 ,  B03C3/013 ,  B01D53/58

Abstract: Disclosed is a method for the removal of soluble particulate matter from a gas stream, such as urea dust from the off-gas of a finishing section of a urea production plant. The method comprises subjecting the off-gas to at least two quenching stages an aqueous quenching liquid. The quenching liquid used in a first, upstream quench stage, is allowed to have a higher concentration of dissolved particulate matter than the quenching liquid in the second, downstream quench stage. The quenched gas is led through a particle capture zone, typically comprising one or more of a wet scrubber, a Venturi scrubber, and a wet electrostatic precipitator.

公开(公告)号：US10722831B2

公开(公告)日：2020-07-28

申请号：US16563696

申请日：2019-09-06

Applicant: Stamicarbon B.V.

Inventor： Brian Sayre Higgins ,  John Marshall Tate, III ,  Robert Arthur Yates ,  Marcel Julien Pomerleau ,  Jon Michael Heon ,  Wilfried Marc Renatt Dirkx ,  Juan Coloma González

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