GB2032591A - Underjet fired coke ovens - Google Patents
Underjet fired coke ovens Download PDFInfo
- Publication number
- GB2032591A GB2032591A GB7842502A GB7842502A GB2032591A GB 2032591 A GB2032591 A GB 2032591A GB 7842502 A GB7842502 A GB 7842502A GB 7842502 A GB7842502 A GB 7842502A GB 2032591 A GB2032591 A GB 2032591A
- Authority
- GB
- United Kingdom
- Prior art keywords
- underjet
- convergent
- nozzle
- chamber
- gases
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000011326 fired coke Substances 0.000 title 1
- 239000007789 gas Substances 0.000 claims abstract description 26
- 239000002737 fuel gas Substances 0.000 claims abstract description 14
- 239000000571 coke Substances 0.000 claims abstract description 10
- 238000002485 combustion reaction Methods 0.000 claims abstract description 10
- 206010022000 influenza Diseases 0.000 description 9
- 239000000567 combustion gas Substances 0.000 description 5
- 239000011819 refractory material Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B21/00—Heating of coke ovens with combustible gases
- C10B21/10—Regulating and controlling the combustion
- C10B21/18—Recirculating the flue gases
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B21/00—Heating of coke ovens with combustible gases
- C10B21/10—Regulating and controlling the combustion
- C10B21/12—Burners
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Materials Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Combustion Of Fluid Fuel (AREA)
Abstract
A burner jet means 11 for effecting upward discharge of rich fuel gases and combusted gases to an upright combustion flue of an underjet fired, horizontal coke oven battery has an underjet nozzle 12 positioned in the base of a chamber 16 below the flue out of the direct flow path of combusted gases through a lateral connection 13 to the chamber. A convergent-divergent entry 25 to the flue is formed as an envelope of revolution 18 of a quadrant of a circle merging with a cylindrical throat 19 merging in turn with a frusto-conical diffuser 20. The battery is provided with gas changeover valve means effective alternately to either flow gases through the chamber 16 from the rich fuel gas nozzle 12 and from a combusted gas cross-over connection 17 to the duct 25 or to flow combusted gases from the duct 25 to the connection 17. <IMAGE>
Description
SPECIFICATION
Improvements relating to underjet fired horizontal coke oven batteries
This invention relates to an underjet fired,
horizontal coke oven battery provided with
upright, combustion, flues and, more particularly, to burner jet means effecting upward discharge of
rich fuel gas and combusted gases to the upright
combustion flues.
According to the present invention there is
provided an underjet fired, horizontal coke oven
battery including underjet nozzles each arranged to discharge a stream of rich fuel gas through and
across a chamber and into a convergent-divergent duct having an internal surface generated as an
envelope of revolution of a line approximating to
an aerofoil section connected to an upright, combustion, flue, the battery being provided with gas changeover valve means effective alternately to either flow gases through the chamber from the rich fuel gas nozzle and from a combusted gases cross-over connection to the convergent-divergent
duct or to flow combusted gases from the
convergent-divergent duct to the cross-over connection, and the nozzle being positioned out of the direct flow path of the combusted gases.
Preferably, the convergent-divergent duct includes a convergent entry formed as an envelope of revolution of a quadrant of a circle merging with a cylindrical throat merging in turn with a frusto-conical diffuser.
Desirably the nozzle is positioned in a region of a port opening into the chamber remote from the chamber.
Suitably the nozzle is formed with a convergent discharge aperture.
In one embodiment of the invention, as illustrated, by way of example, with reference to the accompanying, partly diagrammatic, sectioned drawing of a portion of an underjet fired, horizontal coke oven battery burner jet means 11 includes a tubular, rich fuel gas, discharge nozzle 1 2 threaded into a block 22 connected to a supply duct 23 located at the base of the jet means 11. A convergent discharge head 1 4 of the nozzle 12 is positioned within a cylindrical port, or riser, 13 extending through refractory material 24 of the jet means and is spaced from an exit 1 5 thereof.A cylindrical suction chamber 1 6 is formed in the refractory material co-axial of the riser 13 and has opening thereinto a circular cross-section, hot exhaust gas, cross-over duct 1 7. A convergentdivergent duct 25 is formed in the refractory material 24 to extend between, and coaxially of, the suction chamber 16 and an entry portion 21 of an upright combustion flue (not shown). The duct 25 is formed with an internal surface generated as an envelope of revolution of a line approximating to an aerofoil section having a centre of pressure adjacent the leading edge. A convergent entry 1 8 is formed as an envelope of revolution of a quadrant of a circle and merges with a cylindrical throat 1 9 which, in turn merges with a frustoconical diffuser 20.
In operation, a portion of the hot exhaust vq, gases discharged following utilisation for heat regeneration purposes are supplied to the suction chamber 1 6 through the duct 1 7 concurrent with discharge of a stream of rich fuel gas through the duct 23, nozzle 1 2 and discharge head 14.The velocity of the stream of rich fuel gas is such that the hot exhaust gases are aspirated into the suction chamber 1 6 and the convergent-divergent duct 25 to effectively dilute the rich fuel gas to give an approximately 1:1 mixture so that, upon combustion, a longer flame path tends to give rise to a more uniform vertical heat distribution in the upright combustion flues and, at the same time, deposition of carbon arising from high temperature cracking of hydrocarbons in the rich fuel gas is avoided or reduced. The upright combustion flues are arranged in paired groupings with "on" flues-to the base of which rich fuel gas and heated air from the regenerator is supplied and in which combustion is occurring-being connected to "off" flues-to which combustion gases from the "on" flues are channelled to effect heat exchange thereto.The combustion gases are then discharged through the suction chamber 1 6 and hot exhaust gas cross-over ducts 1 7 of the "off" flues to the regenerator. Changeover valve means (not shown) are provided to change over the various path path connections at cyclic intervals to interchange the "on" and the "off" flues.
Since the axial cross-section of the convergentdivergent duct 25 approximates to that of a forward centre of pressure, low drag, aerofoil section appropriate to the gas flows encountered low friction losses are engendered by passage through the duct 25 of the gases and it is found that in spacing the rich fuel gas nozzle head 14 a distance greater than the height of the suction chamber 1 6 from the entry to the duct there is no appreciable decrease in the induced flow of hot exhaust gases into the suction chamber, the gas flows remaining the same.With the nozzle head
14 positioned below the level of the base of the suction chamber 16, upon operating the changeover valve such that combustion gases are discharged through the convergent-divergent duct 25 to the hot exhaust gas cross-over duct 17, the nozzle head 14 is positioned out of the main flow of the combustion gases and hence is not
subjected to the full erosive effect thereof such that the life of the nozzle 1 2 before replacement is required is extended compared with the life of a nozzle positioned in the main flow of the combustion gases. The form of the convergent/divergent duct 25 is such that whilst a steady, low friction loss, flow is encouraged in an upward direction-from the suction chamber flow in the opposite direction-toward the suction chamber-is not unduly impaired and friction losses arising from such flow in the opposite direction are such as not to cause undue impedance to the flow.
Claims (5)
1. An underjet fired, horizontal coke oven battery including underjet nozzles each arranged to discharge a stream of rich fuel gas through and across a chamber and into a convergent-divergent duct having an internal surface generated as an envelope of revolution of a line approximating to an aerofoil section connected to an upright, combustion, flue, the battery being provided with gas changeover valve means effective alternately to either flow gases through the chamber from the rich fuel gas nozzle and from a combusted gases cross-over connection to the convergent-divergeni duct or to flow combusted gases from the convergent-divergent duct to the cross-over connection, and the nozzle being positioned out of the direct flow path of the combusted gases.
2. An underjet fired, horizontal coke oven battery as claimed in Claim 1, wherein the convergent-divergent duct includes a convergent entry formed as an envelope of revolution of a quadrant of a circle merging with a cylindrical throat merging in turn with a frusto-conical diffuser.
3. An underjet fired, horizontal coke oven battery as claimed in Claim 1 or Claim 2, wherein the nozzle is positioned in a region of a port opening into the chamber remote from the chamber.
4. An underjet fired, horizontal coke oven battery as claimed in any preceding claim, wherein the nozzle is formed with a convergent discharge aperture.
5. An underjetfired, horizontal coke oven battery having an underjet nozzle arranged and adapted to operate substantially as hereinbefore described with reference to the accompanying drawing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB7842502A GB2032591B (en) | 1978-10-30 | 1978-10-30 | Underjet fired coke ovens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB7842502A GB2032591B (en) | 1978-10-30 | 1978-10-30 | Underjet fired coke ovens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2032591A true GB2032591A (en) | 1980-05-08 |
| GB2032591B GB2032591B (en) | 1983-01-19 |
Family
ID=10500693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7842502A Expired GB2032591B (en) | 1978-10-30 | 1978-10-30 | Underjet fired coke ovens |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2032591B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112815300A (en) * | 2021-01-18 | 2021-05-18 | 山东理工大学 | Combustor of adjustable beam waist type structural position |
-
1978
- 1978-10-30 GB GB7842502A patent/GB2032591B/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112815300A (en) * | 2021-01-18 | 2021-05-18 | 山东理工大学 | Combustor of adjustable beam waist type structural position |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2032591B (en) | 1983-01-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |