EP1528318A1 - Verfahren zur Reinigung der Wärmeaustauschflächen im Betrieb befindlicher Öfen - Google Patents

Verfahren zur Reinigung der Wärmeaustauschflächen im Betrieb befindlicher Öfen Download PDF

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Publication number
EP1528318A1
EP1528318A1 EP03292721A EP03292721A EP1528318A1 EP 1528318 A1 EP1528318 A1 EP 1528318A1 EP 03292721 A EP03292721 A EP 03292721A EP 03292721 A EP03292721 A EP 03292721A EP 1528318 A1 EP1528318 A1 EP 1528318A1
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EP
European Patent Office
Prior art keywords
particles
process according
formulation
cleaned
jet
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
Application number
EP03292721A
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English (en)
French (fr)
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EP1528318B1 (de
Inventor
Henri Ballereau
Philippe Barre
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CTP ENVIRONNEMENT
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CTP ENVIRONNEMENT
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Application filed by CTP ENVIRONNEMENT filed Critical CTP ENVIRONNEMENT
Priority to DE60314147T priority Critical patent/DE60314147T2/de
Priority to EP03292721A priority patent/EP1528318B1/de
Priority to AT03292721T priority patent/ATE363631T1/de
Priority to ES03292721T priority patent/ES2286394T3/es
Priority to PCT/FR2004/002747 priority patent/WO2005045315A1/fr
Publication of EP1528318A1 publication Critical patent/EP1528318A1/de
Application granted granted Critical
Publication of EP1528318B1 publication Critical patent/EP1528318B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
    • F28G1/00—Non-rotary, e.g. reciprocated, appliances
    • F28G1/16—Non-rotary, e.g. reciprocated, appliances using jets of fluid for removing debris
    • F28G1/166—Non-rotary, e.g. reciprocated, appliances using jets of fluid for removing debris from external surfaces of heat exchange conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J3/00—Removing solid residues from passages or chambers beyond the fire, e.g. from flues by soot blowers
    • F23J3/02—Cleaning furnace tubes; Cleaning flues or chimneys
    • F23J3/023—Cleaning furnace tubes; Cleaning flues or chimneys cleaning the fireside of watertubes in boilers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D25/00—Devices or methods for removing incrustations, e.g. slag, metal deposits, dust; Devices or methods for preventing the adherence of slag
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
    • F28G9/00—Cleaning by flushing or washing, e.g. with chemical solvents

Definitions

  • the invention relates to a method for cleaning in operation of furnace surfaces, in particular metal exchange surfaces thermal side fumes of industrial furnaces, such as refining furnaces petroleum and petrochemical industries, as well as industrial boilers.
  • Such ovens often use heavy fuel oil as fuel for economic reasons.
  • the combustion of heavy fuel oil being incomplete, deposits are formed on the heat exchange surfaces.
  • These deposits in particular consist of heavy fractions of hydrocarbons, silica, heavy metals and stable components maintaining a solid inside the oven, even at high temperatures. Similar problems can also be found with other liquid fuels or gaseous.
  • the particles remove deposition by an oxidative chemical effect and by a mechanical effect due to the speed of particles that do not sublimate after being in contact with the surfaces to be cleaned.
  • the aim of the invention is therefore to propose a solution that solves these problems while still being cheap and retaining a good efficiency to eliminate the deposit.
  • the particles are produced at from a formulation mainly constituted (more than 50% by weight) of carbamide.
  • Carbamide (urea) is inexpensive and can be obtained without difficulty major in the form of solid beads.
  • carbamide not an oxidizer, it has been shown to be more effective at removing deposits than previously used products and overall less polluting.
  • the presence in greater quantity of the carbamide in the formulation makes it possible to obtain a melting temperature of the formulation sufficiently high so that the particles are not sublimated before entering the contact surfaces to be cleaned, but also low enough to neutralize the acidic compounds of the deposit, to weaken by chemical action the physical structure of the deposit, then to sublimate or vaporize entirely under the heat of the combustion gases.
  • carbamide in weight
  • a salt of magnesium advantageously magnesium carbonate or silicate of magnesium to the formulation of the particles.
  • the magnesium salt makes it possible to sequester moisture and prevent particle agglomeration and clogging of the device generating the jet of gas.
  • magnesium captures vanadium which is often present in the deposits and which causes the corrosion of heat exchange surfaces. In addition, it allows to slightly increase the melting temperature of the particles, which further improves the cleaning efficiency.
  • magnesium salt between 0.5% and 5% is added. the weight of the formulation of the particles.
  • the oven so that the temperature of said surfaces to be cleaned is greater at 250 ° C.
  • the formulation changes state in coming into contact with the surfaces to be cleaned, which makes it much more powerful to react with the components of the deposit.
  • the particles are advantageously sprayed in contact with the surfaces to be cleaned at a speed of at least 50 ms -1 .
  • the attached figure schematically represents a process of tube cleaning 2 of a cylindrical oven 1 of a refining unit oil.
  • the oven 1 is kept in operation, heated by a burner (not shown)
  • the tubes 2 extend inside the oven between a first end 2a and a second end 2b. Hydrocarbons circulating in said tubes 2 are heated between these two ends by heat exchange with the combustion gases.
  • This deposit To detach this deposit, it is passed an injection rod 4 to through an opening 8 formed in the wall 10 of the oven.
  • This cane projects solid particles 6 against one of the tubes.
  • This cane 4 is supplied with compressed air at a pressure of approximately 5 to 10 bar and solid particles 6 by a device provided for this purpose.
  • the particles 6 are substantially spherical and have a size of between 1 and 5 millimeters, advantageously between 2 and 4 millimeters. They reach the tube 2 at a speed of at least 50m.s -1 , advantageously between 100m.s -1 and 200m.s -1 .
  • the formulation of the particles preferably contains about 98% carbamide - (NH 2 ) 2 CO - and about 2% magnesium carbonate, by weight.
  • the acid derivatives of the deposit are neutralized by the gases from the decomposition of the formulation, which generates an oxide release of sulfur, nitrogen and water vapor.
  • the user then moves the cane injection, as illustrated by arrow 12, between the first 2a and the second 2b end of the tube 2, to remove the deposit on the entire tube. the need, he can pass the cane through other existing openings or specially created in the walls of the oven and it proceeds so analogous with other tubes 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)
  • Treating Waste Gases (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
EP03292721A 2003-10-30 2003-10-30 Verfahren zur Reinigung der Wärmeaustauschflächen im Betrieb befindlicher Öfen Expired - Lifetime EP1528318B1 (de)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE60314147T DE60314147T2 (de) 2003-10-30 2003-10-30 Verfahren zur Reinigung der Wärmeaustauschflächen im Betrieb befindlicher Öfen
EP03292721A EP1528318B1 (de) 2003-10-30 2003-10-30 Verfahren zur Reinigung der Wärmeaustauschflächen im Betrieb befindlicher Öfen
AT03292721T ATE363631T1 (de) 2003-10-30 2003-10-30 Verfahren zur reinigung der wärmeaustauschflächen im betrieb befindlicher öfen
ES03292721T ES2286394T3 (es) 2003-10-30 2003-10-30 Procedimiento de limpieza en marcha de las superficies de intercambio termico de hornos.
PCT/FR2004/002747 WO2005045315A1 (fr) 2003-10-30 2004-10-26 Procede de nettoyage en marche des surfaces d'echange thermique de fours

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP03292721A EP1528318B1 (de) 2003-10-30 2003-10-30 Verfahren zur Reinigung der Wärmeaustauschflächen im Betrieb befindlicher Öfen

Publications (2)

Publication Number Publication Date
EP1528318A1 true EP1528318A1 (de) 2005-05-04
EP1528318B1 EP1528318B1 (de) 2007-05-30

Family

ID=34400590

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03292721A Expired - Lifetime EP1528318B1 (de) 2003-10-30 2003-10-30 Verfahren zur Reinigung der Wärmeaustauschflächen im Betrieb befindlicher Öfen

Country Status (5)

Country Link
EP (1) EP1528318B1 (de)
AT (1) ATE363631T1 (de)
DE (1) DE60314147T2 (de)
ES (1) ES2286394T3 (de)
WO (1) WO2005045315A1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007006293A1 (de) * 2005-07-12 2007-01-18 Bruendermann Georg Verfahren zur reinigung von kraftwerkskesseln
JP2009127908A (ja) * 2007-11-21 2009-06-11 Nippon Steel Engineering Co Ltd ショットクリーニング装置及びショットクリーニング装置のショット球回収方法
RU2707512C1 (ru) * 2019-07-11 2019-11-27 Общество с ограниченной ответственностью "ЛУКОЙЛ-Нижегородниинефтепроект" Средство для очистки поверхности теплообмена печей и котлов методом бластинга
CN110793051A (zh) * 2019-11-19 2020-02-14 云南永昌硅业股份有限公司 一种矿热炉上升烟道清理积灰的方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101748802B1 (ko) * 2016-10-18 2017-06-19 주식회사 지스코 수트 블로워 및 이를 이용한 튜브형 열 교환기의 세정 방법
CN110925958B (zh) * 2018-09-20 2021-07-27 青岛海尔智能技术研发有限公司 一种空调器及清洁控制方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1250357A (de) * 1967-11-24 1971-10-20
EP0410867A1 (de) * 1989-07-28 1991-01-30 Ctp Environnement Verfahren zur Reinigung heisser Flächen von Öfen sowie Einrichtung und Granulat zu dessen Durchführung
US6186869B1 (en) * 1999-02-12 2001-02-13 Cetek Limited Cleaning using welding lances and blasting media

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1250357A (de) * 1967-11-24 1971-10-20
EP0410867A1 (de) * 1989-07-28 1991-01-30 Ctp Environnement Verfahren zur Reinigung heisser Flächen von Öfen sowie Einrichtung und Granulat zu dessen Durchführung
US6186869B1 (en) * 1999-02-12 2001-02-13 Cetek Limited Cleaning using welding lances and blasting media

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007006293A1 (de) * 2005-07-12 2007-01-18 Bruendermann Georg Verfahren zur reinigung von kraftwerkskesseln
JP2009127908A (ja) * 2007-11-21 2009-06-11 Nippon Steel Engineering Co Ltd ショットクリーニング装置及びショットクリーニング装置のショット球回収方法
RU2707512C1 (ru) * 2019-07-11 2019-11-27 Общество с ограниченной ответственностью "ЛУКОЙЛ-Нижегородниинефтепроект" Средство для очистки поверхности теплообмена печей и котлов методом бластинга
CN110793051A (zh) * 2019-11-19 2020-02-14 云南永昌硅业股份有限公司 一种矿热炉上升烟道清理积灰的方法

Also Published As

Publication number Publication date
DE60314147T2 (de) 2008-01-24
EP1528318B1 (de) 2007-05-30
ATE363631T1 (de) 2007-06-15
ES2286394T3 (es) 2007-12-01
DE60314147D1 (de) 2007-07-12
WO2005045315A1 (fr) 2005-05-19

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