Non-perpendicular connections between coke oven uptakes and a hot common tunnel, and associated systems and methods

Patent metadata

Field	Value
Publication number	US-10047295-B2
Application number	US-201313830971-A
Country	US
Kind code	B2
Filing date	Mar 14, 2013
Priority date	Dec 28, 2012
Publication date	Aug 14, 2018
Grant date	Aug 14, 2018

Abstract

The present technology is generally directed to non-perpendicular connections between coke oven uptakes and a hot common tunnel, and associated systems and methods. In some embodiments, a coking system includes a coke oven and an uptake duct in fluid communication with the coke oven. The uptake duct has an uptake flow vector of exhaust gas from the coke oven. The system also includes a common tunnel in fluid communication with the uptake duct. The common tunnel has a common flow vector and can be configured to transfer the exhaust gas to a venting system. The uptake flow vector and common flow vector can meet at a non-perpendicular interface to improve mixing between the flow vectors and reduce draft loss in the common tunnel.

First claim

We claim:

1. A coking system, comprising:
a plurality of coke ovens;
a plurality of uptake ducts in fluid communication with the plurality of coke ovens; each of the plurality of uptake ducts having an uptake flow vector of exhaust gas from at least one of the plurality of coke ovens; and
a common tunnel having a common flow vector of exhaust gas and configured to transfer the exhaust gas to a venting system; the plurality of coke ovens, plurality of uptake ducts, and common tunnel being fluidly coupled with one another to define a negative pressure exhaust system, whereby a draft is induced within the coking system;
the plurality of uptake ducts and common tunnel being fluidly coupled with one another at a plurality of interfaces; at least some of the plurality of interfaces being non-perpendicular, wherein the uptake ducts are disposed at angles with respect to the common tunnel and bias the uptake flow vectors and common flow vector toward a common flow direction, whereby minimizing a static pressure differential between an upstream portion and a downstream portion of the common tunnel and discouraging a draft loss within the coking system;
at least one of the plurality of uptake ducts comprising a converging portion, which converges in a direction of the uptake flow vector in a manner that minimizes flow energy losses, and a diverging portion, which defines an interface that modifies the uptake flow vector to have an x-component in common with the common flow vector and reduces draft loss between the uptake flow and the common flow.

2. The coking system of claim 1 wherein the uptake flow vector of each of the plurality of uptake ducts includes an x-component, a y-component, and a z-component and the common flow vector includes an x-component, a y-component, and a z-component; the y-components of the uptake flow vector and the common flow vector disposed in different directions; the z-components of the uptake flow vector and the common flow vector disposed in different directions.

3. The coking system of claim 1 wherein the common tunnel has a common tunnel height, an upper portion above a midpoint of the common tunnel height, and a lower portion below the midpoint of the common tunnel height, and wherein at least some of the uptake ducts interface with the common tunnel at the upper portion or the lower portion, but not both, simultaneously.

4. The coking system of claim 1 wherein at least one non-perpendicular interface comprises at least one of a baffle, gunned surface, contoured duct liner, or convex flow modifier coupled with an inner surface of at least one of the uptake duct or common tunnel and configured to alter at least one of the uptake flow vector or common flow vector.

5. The coking system of claim 4 wherein the baffle, gunned surface, contoured duct liner, or convex flow modifier is integral to at least one of the uptake duct or common tunnel or is retrofitted onto the uptake duct or common tunnel.

6. The coking system of claim 1 wherein the plurality of uptake ducts comprises a first uptake duct in fluid communication with a first coke oven of the plurality of coke ovens and having a first uptake flow vector, and wherein the system further comprises a second uptake duct of the plurality of uptake dusts in fluid communication with the first coke oven or a second coke oven of the plurality of coke ovens and having a second uptake flow vector of exhaust gas.

7. The coking system of claim 6 wherein the first uptake flow vector and common flow vector meet at a non-perpendicular interface, and the second uptake flow vector and common flow vector meet at a perpendicular interface.

8. The coking system of claim 6 wherein the first uptake flow vector and common flow vector meet at a non-perpendicular interface and the second uptake flow vector and common flow vector meet at a non-perpendicular interface.

9. The coking system of claim 6 wherein at least a portion of the first uptake duct is non-perpendicular to the common tunnel by a first angle and at least a portion of the second uptake duct is non-perpendicular to the common tunnel by a second angle different from the first angle.

10. The coking system of claim 6 wherein:
the system further comprises a third uptake duct of the plurality of uptake ducts in fluid communication with the first coke oven, the second coke oven, or a third coke oven of the plurality of coke ovens and having a third uptake flow vector of exhaust gas;
the first uptake duct, second uptake duct, and third uptake duct are positioned along a lateral side of the common tunnel; and
there is a first distance between the first uptake duct and second uptake duct and a second distance different from the first distance between the second uptake duct and the third uptake duct.

11. The coking system of claim 6 wherein the first uptake duct is positioned on a first lateral side of the common tunnel and the second uptake duct is positioned on a second lateral side of the common tunnel opposite the first lateral side, and wherein the first uptake duct and second uptake duct are laterally offset from one another.

12. The coking system of claim 6 wherein the first uptake duct and second uptake duct are positioned on a common lateral side of the common tunnel, and wherein there are no uptake ducts on an opposing lateral side of the common tunnel.

13. The coking system of claim 1 wherein the common tunnel has one of a non-circular, oval, elongated oval, asymmetrical oval, or rectangular cross-sectional shape.

14. A coking system, comprising:
a common tunnel configured to direct a gas from one or more coke ovens to a common stack, wherein the common tunnel has a common tunnel flow with a common tunnel flow vector, and wherein the common tunnel flow vector has an x-component extending along a long axis of the common tunnel, a y-component extending along a width of the common tunnel, and a z-component extending along a height of the common tunnel; the common tunnel having an elliptical cross-sectional shape and a cross-sectional area above a centerline that is greater than a cross-sectional area below the centerline, such that combustion is urged upward within the common tunnel;
a coke oven in fluid connection with the common tunnel via an uptake, wherein:
the uptake includes an uptake flow having an uptake flow vector with an x-component, a y-component, and a z-component; and
the uptake connects to the common tunnel at an intersection, wherein the uptake is disposed at an angle with respect to the common tunnel;

wherein the uptake flow vector z-component has a different direction than the z-component of the common tunnel flow vector, whereby encouraging mixing and combustion of unburned volatile material and oxygen inside the common tunnel.

15. The coking system of claim 14 wherein an inner characteristic dimension of the uptake at least one of increases or decreases in the direction of the intersection.

16. The coking system of claim 14 wherein the uptake further includes an angled baffle at or near the intersection, the baffle configured to redirect the uptake flow.

17. The coking system of claim 14 wherein the z-component of the uptake is in a downward direction, such that buoyancy of gases exiting the uptake are at least partially countered and combustion of the gases are encouraged to occur toward a lower portion of the common tunnel.

Assignees

• Suncoke Tech & Development Llc

Inventors

• Chun Ung-Kyung
• Choi Chun Wai
• Kaplarevic Milos
• Kapoor Rajat
• Quanci John Francis

Classifications

• C10B45/00

  Other details · CPC title

• C10B15/02 Primary

  with floor heating · CPC title