EP0291409B1 - Procédé et dispositif de décokage hydraulique de coke de pétrole - Google Patents

Procédé et dispositif de décokage hydraulique de coke de pétrole Download PDF

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Publication number
EP0291409B1
EP0291409B1 EP19880401146 EP88401146A EP0291409B1 EP 0291409 B1 EP0291409 B1 EP 0291409B1 EP 19880401146 EP19880401146 EP 19880401146 EP 88401146 A EP88401146 A EP 88401146A EP 0291409 B1 EP0291409 B1 EP 0291409B1
Authority
EP
European Patent Office
Prior art keywords
pipe
reactor
drum
dan
water
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.)
Expired - Lifetime
Application number
EP19880401146
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0291409A1 (fr
Inventor
Daniel Lumbroso
Adrien Orieux
Michel Davidson
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.)
IFP Energies Nouvelles IFPEN
Original Assignee
IFP Energies Nouvelles IFPEN
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Publication date
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Publication of EP0291409A1 publication Critical patent/EP0291409A1/fr
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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
    • C10B33/00—Discharging devices; Coke guides
    • C10B33/006—Decoking tools, e.g. hydraulic coke removing tools with boring or cutting nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
    • B08B9/08—Cleaning containers, e.g. tanks
    • B08B9/093—Cleaning containers, e.g. tanks by the force of jets or sprays
    • B08B9/0936—Cleaning containers, e.g. tanks by the force of jets or sprays using rotating jets

Definitions

  • the invention relates to a process for coking hydrocarbon feedstocks, heavy distillation products or residues. It relates more particularly to the subsequent step of recovering the coke (decoking or decoking) after it has deposited in the reactor.
  • Coking is a process well known in the refining industry, the objective of which is to enhance heavy cuts and especially the distillation residues by subjecting them to thermal decomposition.
  • the charge is most often introduced from the bottom of the reactor and, in this case, the coke is deposited first at the bottom of the reactor; it then gradually fills higher and higher parts of the reactor until it is completely filled.
  • the reactor After having purged the reactor of all the residual hydrocarbons and having cooled it, it is opened at its upper part and a hole is dug using suitable tools. These are usually supported by scaffolding or a derrick which allows digging inside the reactor from its top.
  • the scaffolding structure (one per reactor, there are at least two reactors) is installed above the reactors themselves located well above the ground to allow the injection of the charge and above all to recover the coke produced which descends by gravity of the reactor to then be transported to a storage area or to the user.
  • the object of the invention is a method and a device which make it possible to avoid the scaffolding above the reactors in order to lighten the entire structure, save investment and make the extraction of coke more practical and economical.
  • the invention consists in bringing down into the reactor, from a drum on which it is wound, a flexible tube of controlled rigidity, the free end (the one which is furthest from the axis of the drum when the tube is wound) is provided with means for ejecting water downwards and / or laterally and the descent of which is controlled by the rotation of the drum.
  • the other end of the tube is connected to a source of pressurized water: the water flows through the tube to the ejection means and is projected towards the coke bed. The pieces of coke that have come off are removed.
  • the invention uses flexible pipes, which have properties such that they safely allow water to be transported under very high pressure.
  • these hoses are very resistant to tensile forces and have controlled rigidity. They make it possible to suspend large masses at their ends, which makes it possible on the one hand to introduce tools (turbine) inside the reactor and moreover to avoid the dangling of the hose when water flows at high pressure are used.
  • a pipe, stored on a drum, is therefore suspended above a reactor and can be introduced gradually, by rotation of the drum, to the bottom of the reactor.
  • the other end of the hose is connected to a pump which injects water under high pressure.
  • the pipe and the ejection device are gradually raised by rewinding the pipe on the drum, and the water ejection device is modified so that the ejection can now be done laterally, with a tangential component, and no longer only downwards.
  • the downward ejection is completely eliminated.
  • the flexible tube and the ejection device are again introduced through the previously drilled passage.
  • the pressure of the water in a lateral direction, with tangential component is then established at 100-600 bars or more, preferably 150-400 bars, which crumbles the coke which escapes from the base into pieces entrained by the water.
  • the fact of using a high pressure, for example 150-400 bars or more, makes it possible to obtain relatively large pieces of coke and to avoid excessively fine dust which would be difficult to separate later.
  • the stopping of the vertical ejection of water, downwards, and the starting of the lateral ejection of water can be controlled remotely by any suitable device (using, for example, remote control conductors built into the hose), which eliminates the need to reassemble the hose.
  • the drum which carries the hose can be mobile; it can move for example on rails and can thus be placed above the reactor to be decoked while the other reactors are in service or awaiting decoking.
  • the flexible tubes which can be used in the invention will consist of superimposed layers which may include one or more watertight plastic sheaths, at least one reinforcement for resistance to internal pressure, which may consist, for example, of at least one short pitch spiral winding , and at least one tensile strength and torsional strength armature, which may for example be made up of two long-pitched crossed windings.
  • Torsional limit torque 100 to 10,000 m. daN, preferably 500 to 5000 m.daN.
  • Rigidity at 20 ° C 50 to 1000 daN.m 2 , preferably 100 to 500 daN.m 2 .
  • the operation is carried out with a weight suspended from the tube (ejector + possibly weighting mass) from 10 3 to 5.10 4 N; this weight must obviously be chosen compatible with the breaking strength.
  • FIGS. 2a and 2b illustrate a particular embodiment of the water ejection device, respectively in side view and in section BB perpendicular to the axis, at the level of the nozzle 22.
  • the installation includes two coking reactors 1 and 2.
  • Reactor 1 is in the process of emptying the coke and reactor 2 in the process of depositing coke (coking).
  • the lines for admitting the hydrocarbon charge and for withdrawing volatile products have not been shown, for the purpose of simplification.
  • a winding drum or reel 3 is disposed above the reactors. Its rotation shaft is hollow and is used for the supply of water, brought under pressure by line 4, by means of a rotary joint connecting the rotation shaft of the reel to the line.
  • the axis of the drum is supported by two rigid flanges of which only one (5) is visible.
  • the two flanges are supported on a chassis provided with wheels such as 7 and 8, allowing the assembly to be moved on the raceway 9.
  • the assembly is carried by a scaffolding, or superstructure, comprising in particular the beams 10 to 13.
  • a flexible tube of high mechanical strength 14 is wound on the drum. It is connected to line 4 by a coupling piece, not shown, which allows the feed whatever the position of the drum.
  • the other end carries a turbine 15 capable of rotating on itself under the effect of water jets leaving nozzles such as 17 and 22 whose orientation includes a tangential component. If the turbine is not sufficiently heavy, a relatively heavy additional mass 16 makes it possible to increase the weight suspended from the tube.
  • a pulley 18 makes it possible to guide the flexible tube and therefore to keep it in the axis of the reactor, whatever the degree of unwinding of the tube on the drum.
  • the turbine 15 has nozzles 17, 21 and 25 directed downwards and nozzles 22 to 24 directed laterally with a tangential component relative to the rotation of the turbine. This is independent of the mass 16 which normally is not driven in rotation (the connection between the turbine 15 and the mass 16 is made by means of bearings).
  • the operation may for example be as follows: the tool 15/16 being initially raised above the reactor 1, the upper 19 and lower 20 ends of the reactor filled with coke are opened and the assembly is lowered (14,15, 16), by unrolling the pipe 14 on its drum.
  • the pressurized water supplying the hose 14 is ejected from the lower ejectors, directed downwards, such as 17 and 21, and the descent of the pipe into the reactor continues as a well is drilled by the jets in the coke bed.
  • the coke is entrained by the lower opening 20 and falls under the reactor from where it is evacuated by transport devices of known type.
  • the tool is then pulled out of the reactor, then the lower ejectors 17, 21 and 25 of the turbine are closed (except when it is desired to increase the driving effect of the coke), and the lateral ejectors 22 to 24 are opened.
  • the coke is detached from the walls of the reactor, and is discharged through opening 20.
  • Reactor 1 is used for a new coking operation.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Coke Industry (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
EP19880401146 1987-05-13 1988-05-10 Procédé et dispositif de décokage hydraulique de coke de pétrole Expired - Lifetime EP0291409B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8706765 1987-05-13
FR8706765A FR2615198B1 (fr) 1987-05-13 1987-05-13 Procede et dispositif de decokage hydraulique de coke de petrole

Publications (2)

Publication Number Publication Date
EP0291409A1 EP0291409A1 (fr) 1988-11-17
EP0291409B1 true EP0291409B1 (fr) 1991-01-23

Family

ID=9351084

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880401146 Expired - Lifetime EP0291409B1 (fr) 1987-05-13 1988-05-10 Procédé et dispositif de décokage hydraulique de coke de pétrole

Country Status (7)

Country Link
EP (1) EP0291409B1 (cs)
JP (1) JP2552526B2 (cs)
CA (1) CA1335580C (cs)
DE (1) DE3861624D1 (cs)
ES (1) ES2021447B3 (cs)
FR (1) FR2615198B1 (cs)
IN (1) IN171268B (cs)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104056829A (zh) * 2014-05-30 2014-09-24 浙江大学 一种热等离子体反应器的连续清焦方法

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IN171582B (cs) * 1987-05-25 1992-11-21 Luoyang Petrochem Eng
FR2640992B1 (cs) * 1988-12-26 1993-07-02 Inst Francais Du Petrole
DE4340528C2 (de) * 1993-11-29 1997-02-20 Uraca Pumpen Vorrichtung zur Innenreinigung von Tanks
RU2206593C1 (ru) * 2002-01-31 2003-06-20 Государственное унитарное предприятие Институт нефтехимпереработки АН Республики Башкортостан Гидравлический резак гру - зму
US20080314413A1 (en) * 2007-06-20 2008-12-25 Exxonmobil Research And Engineering Company Cyclone cleaning device and method
RU2434047C1 (ru) * 2010-03-29 2011-11-20 Государственное унитарное предприятие "Институт нефтехимпереработки Республики Башкортостан" (ГУП "ИНХП РБ") Реактор для топливного кокса
CN103341461B (zh) * 2013-07-25 2015-08-19 无锡市群征干燥设备有限公司 喷雾干燥机的软管清洗装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2254848A (en) * 1938-12-28 1941-09-02 Worthington Pump & Mach Corp Hydraulic system
US4107001A (en) * 1977-08-12 1978-08-15 Koppers Company, Inc. High pressure water cleaner for ascension pipes
DE2840447C2 (de) * 1978-09-16 1985-01-24 Uraca Pumpenfabrik GmbH & Co KG, 7432 Urach Vorrichtung zur Reinigung der Innenflächen von Behältern oder Rohren

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104056829A (zh) * 2014-05-30 2014-09-24 浙江大学 一种热等离子体反应器的连续清焦方法

Also Published As

Publication number Publication date
IN171268B (cs) 1992-08-29
DE3861624D1 (de) 1991-02-28
JP2552526B2 (ja) 1996-11-13
JPS63305191A (ja) 1988-12-13
FR2615198A1 (fr) 1988-11-18
EP0291409A1 (fr) 1988-11-17
FR2615198B1 (fr) 1991-01-11
CA1335580C (fr) 1995-05-16
ES2021447B3 (es) 1991-11-01

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