Chun Hwa Choi

Address:

1309 Orrington Ct, Wheeling, IL 60090

Phone:

(847)5418611

VIN:

1G2AL15F677156208

Make:

PONTIAC

Model:

G5

Year:

2007

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.

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.

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.

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.

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.

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.

US Patent:

20210024828, Jan 28, 2021

Filed:

Jun 10, 2020

Appl. No.:

16/897957

Inventors:

- Lisle IL, US
Cedino Renato De Lima - Serra ES, BR
Charles Humberto Effgen Wernesbach - Serra ES, BR
Jose Sidnei Nossa - Serra ES, BR
Wander Martins Souza - Serra ES, BR
Chun Wai Choi - Lisle IL, US
Amilton Borghi - Serra ES, BR

International Classification:

C10B 39/14
C10B 39/12

Abstract:

The present technology describes various embodiments of systems and methods for maintaining a flat push hot car. In some embodiments, the flat push hot car includes an at least partially enclosed hot box having an interior portion, an exterior portion, a base, and a plurality of sidewalls extending upward from the base. The hot box can he coupled to or integrated with a fluid distribution system. The fluid distribution system can include a spray manifold having one or more inlets configured to release a fluid directed toward the sidewalls of the interior portion so as to provide regional cooling to the hot box.

US Patent:

20200407641, Dec 31, 2020

Filed:

Apr 10, 2020

Appl. No.:

16/845530

Inventors:

- Lisle IL, US
Chun Wai Choi - Chicago IL, US
Mark Ball - Richlands VA, US
Bradley Thomas Rodgers - Glen Carbon IL, US
Tony Amadio - Lisle IL, US
Gary West - Lisle IL, US
Dwayne Johnson - Naperville IL, US

International Classification:

C10B 43/04
C10B 43/10

Abstract:

The present technology is generally directed to methods of decarbonizing coking ovens, and associated systems and devices. In some embodiments, a method of operating and decarbonizing a coking oven can include inserting a charge of coal into the coking oven and heating the coal. The method can further include removing at least a portion of the charge, leaving behind coking deposits in the coking oven. At least a portion of the deposits can be continuously removed from the coking oven. For example, in some embodiments, at least a portion of the deposits can be removed each time a new charge of coal is inserted in the coking oven.