EP3101092A1 - Dispositif d'extinction à sec du coke - Google Patents

Dispositif d'extinction à sec du coke Download PDF

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Publication number
EP3101092A1
EP3101092A1 EP15170151.3A EP15170151A EP3101092A1 EP 3101092 A1 EP3101092 A1 EP 3101092A1 EP 15170151 A EP15170151 A EP 15170151A EP 3101092 A1 EP3101092 A1 EP 3101092A1
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EP
European Patent Office
Prior art keywords
chamber
coke
cylindrical wall
quenching
gas
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.)
Withdrawn
Application number
EP15170151.3A
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German (de)
English (en)
Inventor
Stefano Pivot
Riccardo Calcagno
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Paul Wurth SA
Original Assignee
Paul Wurth SA
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 Paul Wurth SA filed Critical Paul Wurth SA
Priority to EP15170151.3A priority Critical patent/EP3101092A1/fr
Publication of EP3101092A1 publication Critical patent/EP3101092A1/fr
Withdrawn legal-status Critical Current

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    • 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
    • C10B39/00—Cooling or quenching coke
    • C10B39/02—Dry cooling outside the oven

Definitions

  • the present invention generally relates to coke dry quenching equipment.
  • red hot coke discharged from the coke oven batteries after the carbonization process.
  • the red hot coke is introduced at the top of a shaft-like cooler and travels downward to a bottom outlet, while being cooled by a rising flow of inert gas that circulates in an enclosed system.
  • the coke is cooled down to approximately 200°C while the circulating gas gets heated up to about 800°C.
  • Coke dry quenching has several benefits over conventional water quenching.
  • the release of airborne coke dust into the atmosphere is prevented.
  • thermal energy of the red hot coke can be recovered from the cooling gas e.g. for the production of steam, thus contributing to prevent global warming.
  • a conventional coke dry quenching device 10 is illustrated in Fig. 1 . It comprises a pre-chamber 12 with a coke inlet opening 14 through which hot, granular coke is fed into the pre-chamber, and a quenching chamber 16 located below the pre-chamber 12.
  • the pre-chamber 12 has a cylindrical wall 18 extending along a central, vertical axis A and the quenching chamber 16 comprises a cylindrical wall 20 in axial continuity of the pre-chamber 12 to receive the descending coke.
  • Gas supply means (not shown) are provided in the lower region of the quenching chamber 16 to supply cooling gas (generally inert gas) therein.
  • Such quenching device 10 forms a counter-flow reactor wherein the hot coke introduced at the top gradually descends towards the quenching chamber outlet and is cooled by a rising flow of cooling gas. At the bottom of the quenching chamber, the coke has been cooled down to a temperature of about 200°C and is discharged through a coke discharge aperture (not shown).
  • the hot cooling gas exits the dry quenching device 10 in the top region of the quenching chamber 16 via a plurality of circumferentially distributed gas outlet apertures 22 in communication with gas flues 24 joining into an annular collection channel 26 surrounding the pre-chamber above these openings.
  • Fig.1 shows the conventional design of this transition region of the dry quenching device 10.
  • the wall 18 of the pre-chamber, of smaller diameter than the quenching chamber, is supported by inward cantilevers 30 resting on, and extending from, the top of the quenching chamber wall 20.
  • the annular collection chamber 26 surrounding the pre-chamber 12 is formed between the pre-chamber wall 18 and a surrounding, outer wall 32, supported by an outward cantilevered wall 34 likewise resting on the top of the quenching chamber wall 20.
  • the gas outlet apertures 22 are located in between the cantilevers and the gas flues 24 are inclined outwardly to fluidly connect the respective apertures 22 with the collection chamber 26.
  • the cantilevers support the entire brickwork and masonry above them.
  • EP2338954 discloses a coke dry quenching device with the same overall configuration, however having a particular design in the region of the gas flues.
  • the lower edges of the gas flues are located radially closer to the furnace core than is the side wall surface of the cooling chamber and are positioned between the side wall surface and the outer circumferential edge of a blast head.
  • the flow of the coke in the circumferential edge portion of the cooling chamber is improved.
  • the lower edge portions represent weak points of the coke dry quenching equipment, since the region of the lower edges shows a break or kink in the structure.
  • the object of the present invention is to provide an improved coke dry quenching device, in particular with a more robust design of the top region of the quenching chamber with the gas outlet apertures.
  • the present invention relates to a coke dry quenching device in which hot coke is introduced from a top region and moves downward while being cooled by a counter flow of cooling gas introduced in a bottom region.
  • the coke dry quenching device comprises a pre-chamber having a cylindrical wall extending along a vertical axis and includes a coke inlet aperture through which hot, granular coke is fed into the pre-chamber.
  • a quenching chamber is located below the pre-chamber and comprises: a cylindrical wall in axial continuity of the pre-chamber to receive the descending coke; gas supply means for supplying cooling gas inside the quenching chamber; and a coke discharge aperture at the bottom of the quenching chamber.
  • a plurality of gas outlet apertures are circumferentially distributed in a transition region at the top of the quenching chamber, through which cooling gas is evacuated into gas flues joining into an annular collection channel surrounding the pre-chamber above the gas outlet apertures.
  • the cylindrical wall of the pre-chamber is supported at its bottom by a plurality of circumferentially (peripherally) distributed, substantially vertical support columns resting on the cylindrical wall of the quenching chamber.
  • a corollary of this feature is that the walls of the pre-chamber and of the quenching chamber are substantially aligned along the furnace axis and have a similar or (substantially) identical inner diameter (although their wall thickness may differ).
  • the brickwork / masonry of the pre-chamber is no longer supported by cantilevers but by vertical columns.
  • This change of design has numerous practical benefits.
  • the removal of the cantilever supports for the pre-chamber avoids the creation of weakness points leading to cracks in the support structure at the transition zone.
  • the use of vertical support columns permits increasing the supporting capacity per volume of structural support (i.e. the columns can be narrower than the usual cantilevers), and thus to noticeably enlarge the cross-section of the gas outlet apertures and gas flues.
  • a larger cooling gas flow rate can be obtained with the same gas speed, which has a direct result of a proportionally larger cooled coke production for the same quenching chamber dimensions (i.e. the specific production, expressed in quenching chamber volume per ton of coke hourly quenched, increase).
  • Another benefit of the present design is linked to the increase in diameter of the pre-chamber (compared to conventional cantilevered design) that is aligned with that of the quenching chamber, which allows reducing the height of the pre-chamber for a same volume.
  • the overall plant height can be reduced, leading, amongst others, to savings in the steel structure and reducing the cycle time of the charging crane.
  • the present coke dry quenching device may include one or more of the following features:
  • the pre-chamber 12 is supported by the quenching chamber 16 via cantilevers 30.
  • Such cantilevers 30 are the weak points of the entire brickwork and will, with time, break or crack.
  • Fig.2 shows a principle drawing of an embodiment of the present coke dry quenching device 100.
  • the device 100 comprises a pre-chamber 112 and a quenching chamber 114 (or cooling chamber) that are vertically connected to receive the flow of gradually descending coke, and thus forms a shaft-like cooling device.
  • the pre-chamber 112 comprises mainly a cylindrical wall 116 extending along a vertical axis A'.
  • the wall 116 is generally made from refractory bricks or blocks.
  • the pre-chamber 112 is formed to have, above the cylindrical wall portion 116, a truncated conical section 118, the narrower end of which defines a coke inlet aperture 120 through which hot, granular coke is fed into the pre-chamber 112.
  • a conventional charging device (not shown) - comprising a hopper and removable lid with hydraulic seal - is associated with this inlet aperture 120 to operate the selective charging of the device.
  • the pre-chamber 112 is supported by the quenching chamber 114, which comprises a cylindrical wall 122 in axial continuity of the pre-chamber 112 to receive the descending coke.
  • the wall 122 is generally made from refractory bricks or blocks.
  • the coke, gradually moving down (under the effect of gravity) in the pre-chamber 112 and quenching chamber 114, is evacuated at the bottom of the quenching chamber via a discharge orifice 124 located at the bottom of a funnel section 126 adjacent the lower end of cylindrical wall 122.
  • a gas tight vibro extractor and rotary vane valve may be installed below the coke discharge orifice 124.
  • a double flap valve may be used.
  • Gas supply means are provided for supplying cooling gas inside said quenching chamber. Any appropriate type of gas supply means may be used and no limitation on their shape and amount is imposed herein.
  • reference sign 128 designates a blast head with one or more gas ports (not shown) that is centrally arranged in the quenching chamber, towards the bottom of the cylindrical portion.
  • a plurality of gas inlet orifices 129 are provided in cylindrical wall 122 to allow introduction of gas from the periphery of the coke charge.
  • the cooling gas may generally be an inert gas, e.g. mixture of mainly N 2 with some other gases, e.g. CO, CO 2 and/or H 2 (coming from residual coke distillation in very low percentage).
  • the injected cooling gas flows upward (as indicated by the arrows in Fig.2 ) through the gaps between the coke pieces. As the cooling gas flows upward, it takes up the heat from the coke, which is cooled down.
  • the hot cooling gas is evacuated via a plurality of gas outlet apertures 130 circumferentially distributed in a transition region at the top of the quenching chamber 114. Via these apertures that surround the top wall 122 of the quenching chamber 114, the cooling gas flows into gas flues 132 joining into an annular collection channel 134 surrounding the pre-chamber 112 above these openings 130.
  • This annular collection chamber 134 may generally be formed between the pre-chamber wall 116 and a surrounding, outer cylindrical wall 133, supported by an outward cantilevered wall 135 resting on the top edge 138 of the quenching chamber wall 122 and surrounding the transition region. This cantilevered wall 135 with its inner side defines the sloped bottom surfaces 139 of gas flues 132.
  • the annular collection channel 134 has one or more outlet orifices 131 that communicate with a gas purification and heat recovery system (not shown).
  • the hot cooling gas may firstly be lead through a primary dust catcher and then to a boiler to recover its energy via the production of steam that can be used as process steam or for power generation.
  • the cooled gas may be lead to a secondary dust catcher and then recirculated towards the dry quenching device 10.
  • the latter is also often referred to as "circulating gas”.
  • the pre-chamber is supported by the quenching chamber by means of a plurality of substantially vertical columns 136 installed in the transition region. These columns 136 are circumferentially/peripherally distributed on the top edge of the quenching chamber wall 122, and thus surround the quenching chamber 114. Generally, in the transition region, the gas outlet apertures 130 and columns 136 may be arranged in an alternate fashion.
  • the columns 136 may have any appropriate shape (e.g. round, square or rectangular cross-section) with a generally constant horizontal cross-section and are designed to support the above brickwork.
  • the pre-chamber 112 is supported by vertical columns 136 resting on the top of the cylindrical wall 122 of the quenching chamber 114.
  • pre-chamber cylindrical wall 116 and quenching chamber wall 122 have a substantially identical inner diameter D.
  • the cylindrical walls of the pre-chamber and quenching chamber are made from fire proof materials, e.g. refractory bricks or blocks.
  • fire proof materials e.g. refractory bricks or blocks.
  • all of the wallings in contact with the coke charge or hot air are advantageously manufactured from refractory materiel.
  • Any appropriate refractory materials can be used.
  • the bricks and masonry for the above cited parts of the device 100 can include reinforced concrete, bricks produced from natural and synthetic materials, including for example: mullite and fireclay bricks, basalt tiles, insulating bricks, various castable types, ceramic boards and fibers, blankets and others.
  • High quality alumina refractory material such as mullite bricks, having a compression stress around 60-70 MPa can support the compression loads coming from the upper construction without any further reinforcement.
  • the shaft structure comprising the quenching chamber 114, pre-chamber 112, transition region with columns 136 and walls 133, 135 are generally designed as one single masonry piece.
  • the brickwork is realized with circular rings of bricks; to achieve the desired wall thickness, shaped bricks (with tongue and grooves) are preferably used to erect several contiguous circular rings of different radiuses. Sliding joints may be foreseen at appropriate locations to compensate for small differential expansions.
  • the masonry is designed to avoid points of stress concentration, which allows using refractory bricks for the whole shaft structure without the need for specific reinforcement.
  • the columns 136 in fact result from the interruption in the brickwork to provide the openings 130 toward the flues 132. Seen from the interior of the device, there is one cylindrical wall of substantially constant diameter between the two inlet and outlet cone section, with gas openings 130 towards the center.
  • the shaft structure of the device 100 is generally held in place by a surrounding metallic structure (not shown). It may e.g. comprise a metallic external shell anchored in the ground at the outer periphery of wall 133 to support the shaft structure laterally, in combination with a supporting structure such as reinforced concrete or structural steel tetrapode.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Coke Industry (AREA)
EP15170151.3A 2015-06-01 2015-06-01 Dispositif d'extinction à sec du coke Withdrawn EP3101092A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP15170151.3A EP3101092A1 (fr) 2015-06-01 2015-06-01 Dispositif d'extinction à sec du coke

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15170151.3A EP3101092A1 (fr) 2015-06-01 2015-06-01 Dispositif d'extinction à sec du coke

Publications (1)

Publication Number Publication Date
EP3101092A1 true EP3101092A1 (fr) 2016-12-07

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EP15170151.3A Withdrawn EP3101092A1 (fr) 2015-06-01 2015-06-01 Dispositif d'extinction à sec du coke

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EP (1) EP3101092A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108587654A (zh) * 2018-05-15 2018-09-28 五冶集团上海有限公司 一种防止干熄炉变形的加固装置
CN109135775A (zh) * 2018-09-10 2019-01-04 中冶焦耐(大连)工程技术有限公司 具有风冷支撑架及环形预存室的干熄炉及其工作方法
CN110655933A (zh) * 2019-10-14 2020-01-07 西安华江环保科技股份有限公司 一种干熄焦工艺用干熄炉
CN113583689A (zh) * 2021-06-18 2021-11-02 中国五冶集团有限公司 一种干熄焦炉斜风道新型牛腿结构
CN115678580A (zh) * 2022-11-07 2023-02-03 拜城县众泰煤焦化有限公司 一种红焦干熄冷却系统及干熄冷却方法
CN116083102A (zh) * 2023-01-28 2023-05-09 中冶焦耐(大连)工程技术有限公司 一种可远程诊断的自标定干熄焦结构
CN119264923A (zh) * 2024-12-09 2025-01-07 临涣焦化股份有限公司 基于干法熄焦炉中的双斜道结构总成

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5639446U (fr) * 1979-09-04 1981-04-13
JPH0366795A (ja) * 1989-08-07 1991-03-22 Shinagawa Refract Co Ltd コークス乾式消火炉並びに該消火炉の操業方法
CN101705102A (zh) * 2009-11-16 2010-05-12 中冶焦耐(大连)工程技术有限公司 一种新结构的干熄炉
EP2338954A1 (fr) 2008-10-14 2011-06-29 Nippon Steel Engineering Co., Ltd. Installation d extinction à sec du coke

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5639446U (fr) * 1979-09-04 1981-04-13
JPH0366795A (ja) * 1989-08-07 1991-03-22 Shinagawa Refract Co Ltd コークス乾式消火炉並びに該消火炉の操業方法
EP2338954A1 (fr) 2008-10-14 2011-06-29 Nippon Steel Engineering Co., Ltd. Installation d extinction à sec du coke
CN101705102A (zh) * 2009-11-16 2010-05-12 中冶焦耐(大连)工程技术有限公司 一种新结构的干熄炉

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108587654A (zh) * 2018-05-15 2018-09-28 五冶集团上海有限公司 一种防止干熄炉变形的加固装置
CN109135775A (zh) * 2018-09-10 2019-01-04 中冶焦耐(大连)工程技术有限公司 具有风冷支撑架及环形预存室的干熄炉及其工作方法
CN109135775B (zh) * 2018-09-10 2023-10-20 中冶焦耐(大连)工程技术有限公司 具有风冷支撑架及环形预存室的干熄炉及其工作方法
CN110655933A (zh) * 2019-10-14 2020-01-07 西安华江环保科技股份有限公司 一种干熄焦工艺用干熄炉
CN113583689A (zh) * 2021-06-18 2021-11-02 中国五冶集团有限公司 一种干熄焦炉斜风道新型牛腿结构
CN115678580A (zh) * 2022-11-07 2023-02-03 拜城县众泰煤焦化有限公司 一种红焦干熄冷却系统及干熄冷却方法
CN116083102A (zh) * 2023-01-28 2023-05-09 中冶焦耐(大连)工程技术有限公司 一种可远程诊断的自标定干熄焦结构
CN119264923A (zh) * 2024-12-09 2025-01-07 临涣焦化股份有限公司 基于干法熄焦炉中的双斜道结构总成

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