Oven uptakes

Patent metadata

Field	Value
Publication number	US-11760937-B2
Application number	US-201916729053-A
Country	US
Kind code	B2
Filing date	Dec 27, 2019
Priority date	Dec 28, 2018
Publication date	Sep 19, 2023
Grant date	Sep 19, 2023

Abstract

Systems and apparatuses for controlling oven draft within a coke oven. A representative system includes an uptake damper coupled to an uptake duct that receives exhaust gases from the coke oven and provides the exhaust gases to a common tunnel for further processing. The uptake damper includes a damper plate pivotably coupled to a refractory surface of the uptake duct and an actuator assembly coupled to the damper plate. The damper plate is positioned completely within the uptake duct and the actuator assembly moves the damper plate between a plurality of different configurations by causing the damper plate to rotate relative to the uptake duct. Moving the uptake damper between the different configurations changes the flow rate and pressure of the exhaust gases through the uptake duct, which affects an oven draft within the coke oven.

First claim

We claim:

1. An uptake duct configured to receive exhaust gases, comprising:
a channel through which the exhaust gases are configured to pass in a flow direction;
a first refractory surface;
a second refractory surface that opposes the first refractory surface, wherein the first and second refractory surfaces at least partially define the channel;
a damper positioned entirely within the channel, the damper comprising (i) a first layer comprising a first material including steel or fused silica and (ii) a second layer disposed over the first layer and comprising a second material including ceramic and/or fiber, wherein at least one of the first material or the second material is configured to withstand a temperature of at least 2000° F., and wherein the damper is movable between a plurality of orientations to change the flow of exhaust gases through the channel;
a rod coupled to the damper; and
an actuator coupled to the rod and configured to move the rod coaxially along an axis from a first orientation within the channel to a second orientation within the channel, wherein the axis is angled relative to the flow direction.

2. The uptake duct of claim 1 , wherein the damper is a damper plate having opposing first and second end portions, wherein—
the second end portion is spaced apart from the first refractory surface by a first distance when the damper plate is in a first of the plurality of orientations, and
the second end portion is spaced apart from the first refractory surface by a second distance less than the first distance when the damper plate is in a second of the plurality of orientations.

3. The uptake duct of claim 2 wherein the damper plate has a plate surface that faces towards the first refractory surface and wherein, when the exhaust gases pass over the plate surface, the plate surface has a substantially uniform temperature.

4. The uptake duct of claim 2 wherein the damper plate forms a first acute angle with the second refractory surface when the damper is in the first orientation and a second acute angle greater than the first acute angle when the damper is in the second orientation.

5. The uptake duct of claim 2 , wherein the damper plate comprises a support layer and a facing layer, wherein the facing layer is made from a ceramic or refractory material.

6. An exhaust gas system for a coke oven, comprising:
an uptake duct fluidly coupled to an oven chamber, wherein the uptake duct comprises opposing first and second refractory surfaces defining a channel and is configured to receive a gas flowing in a flow direction;
a damper plate positioned within the uptake duct and having a first end portion and a second end portion;
a rod configured to contact the second end portion of the damper plate; and
an actuator coupled to the rod,
wherein
the first end portion is pivotably coupled to the second refractory surface,
the actuator is configured to move the rod along an axis from a first position within the channel to a second position within the channel, wherein the axis is perpendicular to the flow direction, and wherein the rod, when moving along the axis, is perpendicular to the flow direction,
in operation, actuating the actuator and moving the rod from the first position toward the second position causes the second end portion of the damper plate to approach the first refractory surface,
all of the damper plate is positioned within the uptake duct when the rod is in both the first position and the second position, and
the damper plate, when in a fully-closed position, is non-perpendicular to the flow direction.

7. The exhaust system of claim 6 , wherein the damper plate has a first plate surface that faces generally toward the first refractory surface and a second plate surface that faces generally toward the second refractory surface.

8. The exhaust gas system of claim 7 , wherein the first position comprises a completely-open position and the second position comprises a closed position and wherein the second end portion is positioned adjacent to the first refractory surface when the damper plate is in the closed position and positioned adjacent to the second refractory surface when the damper plate is in the completely-open position.

9. The exhaust system of claim 8 , wherein the first plate surface is substantially parallel to the second refractory surface when the damper plate is in the completely-open position.

10. The exhaust gas system of claim 8 , wherein the uptake duct includes a cavity formed in the second refractory surface and wherein, when the damper plate is in the completely-open position, the damper plate is received within the cavity.

11. The exhaust gas system of claim 10 , wherein, when the damper plate is in the completely-open position and received within the cavity, the first plate surface is coplanar with the second refractory surface and the second plate surface is below the second refractory surface.

12. The exhaust gas system of claim 6 , further comprising:
an opening in the uptake duct that extends through a wall of the uptake duct, wherein the rod extends through the opening, such that in the first position a first portion of the rod extends beyond the second refractory surface and in the second position a second portion, greater than the first portion, of the rod extends beyond the second refractory surface.

13. A coke oven, comprising:
an oven chamber;
an uptake duct in fluid communication with the oven chamber, wherein the uptake duct is configured to receive exhaust gases from the oven chamber in a flow direction;
a rod moveable in a coaxial manner along an axis from a first position within the uptake duct to a second position within the uptake duct, wherein the axis is angled relative to the flow direction;
an actuator coupled to the rod; and
an uptake damper system configured to control an oven draft,
wherein
the uptake damper system comprises a damper positioned entirely within the uptake duct,
the damper, when in a fully closed position, is non-perpendicular to the flow direction,
the damper comprises (i) a first layer comprising a first material including steel or fused silica and (ii) a second layer disposed over the first layer and comprising a second material including fiber, wherein at least one of the first material or the second material is configured to withstand a temperature of at least 2000° F., and
the actuator is configured to control the oven draft by moving the damper to a selected one of a plurality of orientations, the damper remaining entirely within the uptake duct in each of the plurality of the orientations.

14. The coke oven of claim 13 , wherein
the damper is a damper plate comprising opposing first and second end portions,
the damper plate is movable between the plurality of orientations by pivoting ab out the first end portion, and
the actuator is coupled to the second end portion of the damper plate.

15. The coke oven of claim 14 , wherein
the actuator is positioned outside of the uptake duct,
the uptake duct includes an opening that extends through a refractory surface, and
the actuator couples to the second end portion of the damper plate through the opening.

16. The coke oven of claim 15 , wherein the refractory surface is formed on a bottom wall of the uptake duct.

17. The coke oven of claim 15 , wherein the refractory surface is formed on a sidewall of the uptake duct.

18. The coke oven of claim 13 , wherein the uptake damper system is configured to operate at temperatures greater than 500° F.

19. The co

Assignees

• Suncoke Tech & Development Llc

Inventors

• Quanci John Francis
• West Gary Dean

Classifications

• C10B15/02 Primary

  with floor heating · CPC title

• C10B21/16 Primary

  by controlling or varying the openings between the heating flues and the regenerator flues · CPC title

• C10B27/06

  Conduit details, e.g. valves · CPC title