Chun S Choi from Aurora, CO, age 66

Chun W Choi

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Specialties:

Surgery

Chun Choi

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Chun Sik Choi

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Chun Choi

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Us Patents

Method For Removal Of Gaseous Inclusions From Viscous Liquids
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US Patent:

7874179, Jan 25, 2011
Filed:

Apr 4, 2008
Appl. No.:

12/062556
Inventors:

David M. Rue - Chicago IL, US
Chun Choi - Chicago IL, US
Assignee:

Gas Technology Institute - Des Plaines IL
International Classification:

C03B 5/182
C03B 5/225
US Classification:

651349, 95241, 95252
Abstract:

A method for removal of gaseous inclusions from a viscous liquid in which a layer of filter particles is positioned in the viscous liquid and the viscous liquid is passed through the layer of filter particles, whereby the gaseous inclusions combine or coalesce within the layer of filter particles, forming larger gaseous inclusions which rise to the top of the viscous liquid and escape therefrom.

Convective Thermal Removal Of Gaseous Inclusions From Viscous Liquids
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US Patent:

20120210751, Aug 23, 2012
Filed:

Feb 18, 2011
Appl. No.:

13/030173
Inventors:

David M. Rue - Chicago IL, US
V. Walter Kunc - Clarendon Hills IL, US
John Charles Wagner - Lagrange IL, US
Chun W. Choi - Chicago IL, US
Assignee:

GAS TECHNOLOGY INSTITUTE - Des Plaines IL
International Classification:

C03B 5/225
B01D 19/00
US Classification:

651349, 95252
Abstract:

A method for removing gaseous inclusions from a viscous liquid in which a viscous liquid stream having gaseous inclusions is introduced into a refining chamber, resulting in a flowing viscous liquid layer. The viscosity of a bottom portion of the viscous liquid layer is reduced in a first refining zone in the refining chamber so as to produce an upwardly mobile reduced viscosity portion of the viscous liquid layer. Heat is introduced into the viscous liquid layer from above the viscous liquid layer in a second refining zone in the refining chamber downstream of the first refining zone, reducing the gaseous inclusions in said viscous liquid layer. Thereafter, the viscous liquid layer having substantially reduced gaseous inclusions is discharged from the refining chamber.

Heat Recovery Oven Foundation
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US Patent:

20220251452, Aug 11, 2022
Filed:

Jan 26, 2022
Appl. No.:

17/584672
Inventors:

- Lisle IL, US
Chun Wai Choi - Chicago IL, US
Mark Anthony Ball - Richards VA, US
Jason Crum - Lisle IL, US
Milos J. Kaplarevic - Lisle IL, US
International Classification:

C10B 15/02
C10B 41/00
C10B 21/20
C10B 29/08
Abstract:

A coke oven includes an oven chamber configured to support and heat a coal bed, a castable slab below the oven chamber, and a foundation supporting the heat recovery oven. One or more beams are positioned between the castable slab and the foundation. The beams extend from a first end of the oven chamber to a second end of the oven chamber, forming a plurality of air gaps between the castable slab and the foundation. Heat from the oven chamber is dissipated by the one or more beams.

Vent Stack Lids And Associated Systems And Methods
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US Patent:

20220204858, Jun 30, 2022
Filed:

Sep 10, 2021
Appl. No.:

17/471491
Inventors:

- Lisle IL, US
Chun Wai Choi - Lisle IL, US
Thomas James Hirt - Lisle IL, US
International Classification:

C10B 27/06
F23J 13/08
F23L 13/00
B23P 19/04
F16J 15/00
Abstract:

The present technology is generally directed to vent stack lids and associated systems and methods. In particular, several embodiments are directed to vent stack lids having improved sealing properties in a coke processing system. In a particular embodiment, a vent stack lid comprises a first lid portion proximate to and at least partially spaced apart from a second lid portion. The vent stack lid further comprises a first sealing portion coupled to the first lid portion and a second sealing portion coupled to the second lid portion. In several embodiments, the second sealing portion at least partially overlaps the first sealing portion over the space between the first and second lid portions. In further embodiments, at least one of the first or second sealing portions includes layers of tadpole seals, spring seals, rigid refractory material, and/or flexible refractory blanket.

System And Method For Repairing A Coke Oven
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US Patent:

20220204859, Jun 30, 2022
Filed:

Nov 8, 2021
Appl. No.:

17/521061
Inventors:

- Lisle IL, US
Mark Anthony Ball - Richlands VA, US
Gary Dean West - Lisle IL, US
John Francis Quanci - Haddonfield NJ, US
Chun Wai Choi - Chicago IL, US
International Classification:

C10B 29/06
C10B 29/02
F27D 1/00
F27D 1/02
F27D 1/12
Abstract:

A system and method for repairing a coke oven having an oven chamber formed from ceramic bricks. A representative system includes a insulated enclosure insertable into the oven chamber and includes removable insulated panels that define an interior area for workers to work in. The insulated enclosure is movable between an expanded configuration and a compact configuration and moving the enclosure to the expanded configuration will decrease the distance between the insulated enclosure and the walls of the oven chamber. Removing the panels exposes the ceramic bricks and allows workers within the interior area to access and the bricks and repair the oven chamber while the oven chamber is still hot. A loading apparatus lifts and inserts the insulated enclosure into the oven chamber. The insulated enclosure can be coupled to additional insulated enclosures to form an elongated interior area.

Spring-Loaded Heat Recovery Oven System And Method
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US Patent:

20220195303, Jun 23, 2022
Filed:

Jul 29, 2021
Appl. No.:

17/388874
Inventors:

- Lisle IL, US
Wes Alderman - Lisle IL, US
Milos J. Kaplarevic - Naperville IL, US
Suresh Mehta - Lisle IL, US
F. Robert Carroll - Lisle IL, US
Chun Wai Choi - Chicago IL, US
International Classification:

C10B 29/04
F24C 15/08
C10B 13/00
C10B 25/12
C10B 25/18
C10B 29/08
Abstract:

A coke oven can include an oven body, a foundation, and a plurality of beams separating the oven body from the foundation, A buckstay applies force to the oven body to maintain compression on the oven body during thermal cycling of the coke oven. The coke oven further comprises a spring-loaded compression device, which can include a restraining device, an anchor coupled to the restraining device, and a spring coupled to the restraining device. The anchor can be attached to one or more of the beams, the foundation of the oven, or to a similar compression device on an opposite side of the oven. The spring applies force between the restraining device and the one or more beams or foundation to compress the buckstay against the oven. The force applied by the spring can maintain structural stability of the coke oven over a plurality of thermal cycles.

Exhaust Flow Modifier, Duct Intersection Incorporating The Same, And Methods Therefor
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US Patent:

20210363427, Nov 25, 2021
Filed:

Mar 3, 2021
Appl. No.:

17/191119
Inventors:

- Lisle IL, US
Rajat Kapoor - Naperville IL, US
Chun Wai Choi - Chicago IL, US
International Classification:

C10B 27/06
F17D 1/02
F01K 3/18
H02K 7/18
Abstract:

A duct intersection comprising a first duct portion and a second duct portion extending laterally from a side of the first duct portion. At least one flow modifier is mounted inside one of the first and second duct portions. The flow modifier is a contoured duct liner and/or the flow modifier includes at least one turning vane. The duct intersection may also include a transition portion extending between the first and second duct portions, wherein the transition portion has a length extending along a side of the first duct portion and a depth extending away from the side of the first duct portion, wherein the length is greater than a diameter of the second duct portion.

Methods And Systems For Improved Coke Quenching
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US Patent:

20210130697, May 6, 2021
Filed:

Jan 4, 2021
Appl. No.:

17/140564
Inventors:

- Lisle IL, US
John Shannon Essman - Wheelersburg OH, US
James Eric Bond - Portsmouth OH, US
Khambath Vichitvongsa - Marysville IL, US
Chun Wai Choi - Chicago IL, US
International Classification:

C10B 39/12
C10B 39/04
C10B 39/14
Abstract:

The present technology describes various embodiments of methods and systems for improved coke quenching. More specifically, some embodiments are directed to methods and systems for improving the coke quenching process by partially cracking coke before it is quenched. In one embodiment, coke is partially cracked when placed in horizontal communication with one or more uneven surfaces. In another embodiment, a coke loaf is partially broken when dropped a vertical distance that is less than the height of the coke loaf. In another embodiment, a mass of coke is partially broken when first placed in vertical communication with one or more uneven surfaces and then placed in horizontal communication with the same or different one or more uneven surfaces. In some embodiments, the one or more uneven surfaces may be mounted to a coke oven, train car, hot car, quench car, or combined hot car/quench car.