WO1996035092A1 - Four a calciner le coke de petrole - Google Patents

Four a calciner le coke de petrole Download PDF

Info

Publication number
WO1996035092A1
WO1996035092A1 PCT/US1996/002917 US9602917W WO9635092A1 WO 1996035092 A1 WO1996035092 A1 WO 1996035092A1 US 9602917 W US9602917 W US 9602917W WO 9635092 A1 WO9635092 A1 WO 9635092A1
Authority
WO
WIPO (PCT)
Prior art keywords
dam
diameter section
calcining
shell
transition zone
Prior art date
Application number
PCT/US1996/002917
Other languages
English (en)
Inventor
Jim R. Roth
Bruce R. Goddard
Original Assignee
Conoco Inc.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Conoco Inc. filed Critical Conoco Inc.
Publication of WO1996035092A1 publication Critical patent/WO1996035092A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/14—Rotary-drum furnaces, i.e. horizontal or slightly inclined with means for agitating or moving the charge
    • F27B7/16—Rotary-drum furnaces, i.e. horizontal or slightly inclined with means for agitating or moving the charge the means being fixed relatively to the drum, e.g. composite means
    • F27B7/167—Rotary-drum furnaces, i.e. horizontal or slightly inclined with means for agitating or moving the charge the means being fixed relatively to the drum, e.g. composite means the means comprising partitions
    • 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
    • C10B1/00—Retorts
    • C10B1/10—Rotary retorts
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L9/00—Treating solid fuels to improve their combustion
    • C10L9/08—Treating solid fuels to improve their combustion by heat treatments, e.g. calcining
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/14—Rotary-drum furnaces, i.e. horizontal or slightly inclined with means for agitating or moving the charge
    • F27B7/16—Rotary-drum furnaces, i.e. horizontal or slightly inclined with means for agitating or moving the charge the means being fixed relatively to the drum, e.g. composite means
    • F27B7/167—Rotary-drum furnaces, i.e. horizontal or slightly inclined with means for agitating or moving the charge the means being fixed relatively to the drum, e.g. composite means the means comprising partitions
    • F27B2007/168—Annular partition

Definitions

  • This invention relates to calcining kilns of
  • Petroleum coke calciners have numerous design criteria. First, they must be capable of properly calcining a design volume of feed. A further design criterium is that fines entrainment in the calciner flue
  • Flue gas treatment equipment typically includes some combination of units such as settling chambers, incinerators, boilers, cyclones, electrostatic
  • Petroleum coke calcining is a well-developed art in which green coke is heated in a kiln to drive off
  • calcined coke there are many properties of calcined coke that are of concern to the user. Some of these properties are vibrated bulk density, grain strength, particle size distribution, friability, porosity, etc. The values for some of these properties can be enhanced by controlling the calcining operation to provide that the coke is heated slowly through a selected temperature range such as from 800 to 1400°F.
  • a rotary calcining kiln is provided with a large diameter section extending from a transition zone back toward the feed end and a smaller diameter section extending from the transition zone to the discharge end, and includes at least one ring-shaped dam on the interior of the large diameter section.
  • the Figure is a schematic representation of a rotary calciner showing the features of the invention.
  • Flow of coke through the calciner can be slowed by having an increased shell diameter from a transition zone back toward the feed end.
  • the coke may not back up the full length of the larger diameter section, with the result that a "void" zone could be created. Heat-up rate in the void zone would be undesirably high.
  • Installation of at least one dam in the larger diameter section eliminates or reduces the void zone and maximizes the benefits of the larger diameter section.
  • By sizing the dam or dams to have an opening at least as large as the smaller diameter section of the kiln entrainment problems that result from use of dams in a constant diameter shell are eliminated or at least minimized.
  • a calciner is shown generally at 1.
  • Calciner 1 has a large diameter section 3 extending from the feed end to a transition zone 5, and a smaller diameter section 7 extending from transition zone 5 to discharge end 11.
  • a feed spout 9 in the feed end and a burner 13 in the discharge end are shown.
  • Conventional ancillary flue gas equipment is not shown, nor is a supplemental air supply means shown, although these items would normally be included in the overall unit.
  • a dam 15 located in the larger diameter section eliminates or minimizes the void zone in the larger diameter section.
  • more than one dam may be provided in the larger diameter section.
  • An alternative to the illustrated embodiment would utilize a first dam and a second dam downstream of the first dam, the second dam being smaller (larger opening) than the first dam.
  • the number, size and position of the dam or dams in the large diameter section can be selected to provide a desired heat-up rate for a particular set of operating variables, it being essential in accordance with the invention that at least one dam be located in the large diameter section.
  • An example of a preferred calciner in accordance with this invention has an overall length of 230 feet, a transition zone about 100 feet from the feed end, a large diameter section extending from the transition zone back about 90 feet toward the feed end, and a small diameter section extending from the transition zone to the discharge end.
  • the internal diameter of the large diameter section is 15 feet, and the internal diameter of the small diameter section is 10.5 feet.
  • a dam is located about 40 feet from the feed end, and extends 2.25 feet into the larger diameter section.
  • Such a calciner can provide a high quality product at a reasonably high feed rate while still maintaining an acceptable level of fines entrainment.
  • Feed rate, burner operation, air supply rate, and calciner RPM can be adjusted to provide the desired low heat-up rate of coke through a selected temperature range such as 800-1400°F. A reduced heat-up rate is desired, and the lowest heat-up rate through the selected range consistent with desired throughput, is preferred.
  • the opening through the dam is as large as the inner diameter of the smaller diameter section of the kiln, so it does not produce major entrainment problems such as would result from a dam in a uniform diameter kiln.
  • Calcined coke quality is measured by many factors, and use of a calciner in accordance with this invention provides the means to control these factors to a degree greater than can be done with conventional calciners.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Materials Engineering (AREA)
  • Coke Industry (AREA)

Abstract

Four rotatif à calciner (1) comportant une enceinte allongée présentant une partie d'un premier diamètre s'étendant de l'extrémité de décharge (11) jusqu'à une zone de transition (5) et une partie d'un second diamètre plus important s'étendant de la zone de transition à l'extrémité d'enfournage, et comportant un élément de resserrement situé dans la section de plus fort diamètre.
PCT/US1996/002917 1995-05-01 1996-02-26 Four a calciner le coke de petrole WO1996035092A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US43412995A 1995-05-01 1995-05-01
US08/434,129 1995-05-01

Publications (1)

Publication Number Publication Date
WO1996035092A1 true WO1996035092A1 (fr) 1996-11-07

Family

ID=23722928

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1996/002917 WO1996035092A1 (fr) 1995-05-01 1996-02-26 Four a calciner le coke de petrole

Country Status (1)

Country Link
WO (1) WO1996035092A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7347052B2 (en) 2004-01-12 2008-03-25 Conocophillips Company Methods and systems for processing uncalcined coke
EP2708520A1 (fr) * 2012-09-14 2014-03-19 Cemex Research Group AG Procédé de fabrication de supplément et de carbonate de calcium à partir d'un agrégat de béton et dispositif de réalisation du procédé

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1914462A (en) * 1930-08-25 1933-06-20 Smidth & Co As F L Rotary kiln
US4022569A (en) * 1975-12-05 1977-05-10 Alcan Research And Development Limited Calcination of coke
US4859177A (en) * 1988-02-16 1989-08-22 Fuller Company Apparatus for incinerating combustible material
US4880379A (en) * 1987-09-30 1989-11-14 Cle Method for transforming a rotary kiln intended in particular for the manufacture of cement, kiln obtained by this method and burning line equipped with this kiln

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1914462A (en) * 1930-08-25 1933-06-20 Smidth & Co As F L Rotary kiln
US4022569A (en) * 1975-12-05 1977-05-10 Alcan Research And Development Limited Calcination of coke
US4880379A (en) * 1987-09-30 1989-11-14 Cle Method for transforming a rotary kiln intended in particular for the manufacture of cement, kiln obtained by this method and burning line equipped with this kiln
US4859177A (en) * 1988-02-16 1989-08-22 Fuller Company Apparatus for incinerating combustible material

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7347052B2 (en) 2004-01-12 2008-03-25 Conocophillips Company Methods and systems for processing uncalcined coke
EP2708520A1 (fr) * 2012-09-14 2014-03-19 Cemex Research Group AG Procédé de fabrication de supplément et de carbonate de calcium à partir d'un agrégat de béton et dispositif de réalisation du procédé
WO2014040852A1 (fr) * 2012-09-14 2014-03-20 Cemex Research Group Ag Procédé de fabrication de granulat et de carbonate de calcium à partir de particules de béton, et dispositif permettant la mise en oeuvre dudit procédé
US9664446B2 (en) 2012-09-14 2017-05-30 Cemex Research Group Ag Method for producing aggregate and calcium carbonate from concrete composite materials, and a device for carrying out said method

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