WO2012143783A2 - Générateur de vapeur à récupération de chaleur et procédé pour commander un générateur de vapeur à récupération de chaleur - Google Patents

Générateur de vapeur à récupération de chaleur et procédé pour commander un générateur de vapeur à récupération de chaleur Download PDF

Info

Publication number
WO2012143783A2
WO2012143783A2 PCT/IB2012/000770 IB2012000770W WO2012143783A2 WO 2012143783 A2 WO2012143783 A2 WO 2012143783A2 IB 2012000770 W IB2012000770 W IB 2012000770W WO 2012143783 A2 WO2012143783 A2 WO 2012143783A2
Authority
WO
WIPO (PCT)
Prior art keywords
oxygen
steam generator
containing gas
heat recovery
recovery steam
Prior art date
Application number
PCT/IB2012/000770
Other languages
English (en)
Other versions
WO2012143783A3 (fr
Inventor
Jiri Jekerle
Original Assignee
Alstom Technology Ltd
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 Alstom Technology Ltd filed Critical Alstom Technology Ltd
Publication of WO2012143783A2 publication Critical patent/WO2012143783A2/fr
Publication of WO2012143783A3 publication Critical patent/WO2012143783A3/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
    • F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00—Methods of steam generation characterised by form of heating method
    • F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
    • F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
    • F22B1/183—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines in combination with metallurgical converter installations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/44—Details; Accessories
    • F23G5/46—Recuperation of heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
    • 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
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/004—Systems for reclaiming waste heat

Definitions

  • the invention relates to a heat recovery steam generator for the cooling of hot flue gases from metallurgical processes and a method for operating a heat recovery steam generator.
  • Such heat recovery steam generators or heat recovery boilers usually comprise a radiation section and a convection section. After-reactions, such as oxidation of sulphur and metals, take place on a large scale in the radiation section of the heat recovery steam generator.
  • the oxygen required for such reactions is blown in the form of oxygen-containing gas, usually air or oxygen-enriched air, for the most part with additional nozzles into the radiation section or radiation chamber (a much smaller part of the air flows through leakage openings into the heat recovery steam generator, since a partial vacuum prevails in the heat recovery steam generator).
  • the nozzles serve not only to feed oxygen-containing gas, but also ensure the increase in the flow turbulence inside the radiation chamber and thus improve the mixing of the flue gases from the metallurgical process furnace with the oxygen-containing gas, in order to accelerate the required chemical reaction.
  • a greater number of nozzles usually has to be installed in order to achieve uniform mixing.
  • the installation of additional platen heating surfaces is often also required in order to achieve uniformity of the flow and mixing over the height of the heat recovery steam generator.
  • the nozzles viewed over width B of the heat recovery steam generator, are disposed at a distance of 200 to 1000 mm from one another. This thus ensures that sufficient feeding of oxygen-containing gas for the efficient after-reaction of constituents of the flue gas takes place over the width of the heat recovery steam generator.
  • the nozzles are preferably disposed in at least one plane. Optimum feeding of oxygen-containing gas is thus ensured.
  • the clear cross- section of the nozzles is round.
  • the form of the gas outflow cone can thus be influenced and the achievable width of the mixing can thus be improved.
  • the time periods or cycle times of the pulsating injection of the oxygen-containing gas i.e. the time from the start of one injection to the start of the next injection, between 1 and 10 seconds, wherein furthermore the duration of the injection itself, i.e. the pulse duration, lies between 0.5 and 5 seconds in an advantageous embodiment.
  • the duration of the cycle times and of the pulse duration is dependent on the size and the geometry of the heat recovery steam generator. It also influences the turbulence and the effective mixing of the oxygen-containing gas with the flue gas.
  • the exit speed of the oxygen-containing gas brought in through the nozzles amounts to 20 to 100 m/s. The effect of this is that the penetration depth of the oxygen-containing gas into the flue gases becomes as great as possible and a correspondingly high turbulence in the flue gas is generated.
  • air is expedient to use air as an oxygen-containing gas.
  • the use of air as an available operating medium is cost neutral and thus easy to manage.
  • a further advantageous embodiment of the invention makes provision to use water vapour of a water-vapour/air mixture as an oxygen-containing gas.
  • Water vapour or a water-vapour/air mixture usually has a higher pressure compared to atmospheric pressure. Means for increasing the pressure of this medium can thus be dispensed with.
  • Fig. 1 shows, represented diagrammatically, a radiation chamber of a heat recovery steam generator in longitudinal cross-section
  • Fig. 2 shows, represented diagrammatically, a cross-section through the radiation chamber according to cross-section A-A in figure 1 .
  • FIG. 1 shows radiation chamber 2 of a heat recovery steam generator, into which the hot process or flue gases 5 from a metallurgical process, for example from a melting or convection furnace not represented (in which a reduction process takes place), are introduced in its front part.
  • Radiation chamber 2 is constituted with radiant heating surfaces not represented, through which a working fluid, usually water or steam, flows. The working fluid takes up heat from hot flue gas 5 and thereby cools down flue gas 5.
  • flue gas 5 After flowing through radiation chamber 2, flue gas 5 then flows out of rear part 9 of radiation chamber 2 into the convection section (not represented) of heat recovery steam generator 1 , in which further heat is removed from the flue gas, which is taken up by the working fluid flowing in the heating surfaces of the convection section.
  • the cooling of flue gas 5 below a specific temperature is necessary in order to enable further process-related processing of flue gases 5.
  • Nozzles 4 are disposed approximately at 90° to upper enclosing wall 10 of radiation chamber 2 and in enclosing wall 10 (i.e. nozzles 4 penetrate enclosing wall 10), wherein enclosing wall 10 is constituted at an angle in front part 3 of radiation chamber 2. Furthermore, nozzles 4 are preferably installed in upper enclosing wall 10, it also being possible for them to be disposed in lower enclosing wall 10.
  • the injection of oxygen- containing gas 6 takes place via a plurality of nozzles 4, which are distributed uniformly over width B of radiation chamber 2.
  • Nozzles 4 are preferably disposed at a distance A of 200 to 1000 mm from one another, wherein nozzles 4 lie on a plane as represented in figure 2. It is however also possible to design the distances of nozzles 4 from one another differently, for example to select closer distances in the centre than at the outside. A further variant, not represented, makes provision to dispose nozzles 4 on two or more planes.
  • nozzles 4 preferably have in each case a clear cross-section Q of approximately 1 to approximately 200 cm 2 , wherein the cross-sections of nozzles 4 can be constituted round or oblong.
  • the exit speed of oxygen-containing gas 6 brought in through nozzles 4 preferably amounts to 20 to 100 m/s. Optimum penetration of oxygen-containing gas 6 into flue gas 5 is thus ensured. Furthermore, the time periods or cycle times of the pulsating injection of oxygen-containing gas 6, i.e. the time from the start of one injection to the start of the next injection, are preferably between 1 and 10 seconds, wherein the duration of the injection itself, i.e. the pulse duration, lies between 0.5 and 5 seconds.
  • feed line 7 to nozzle 4 is provided with a means 8 for effecting a pulsating feeding.
  • means 8 is a quick-opening shut-off valve.
  • the cycle time and pulse duration of the injection of oxygen-containing gas 6 can be fixed as required by means of this quick-opening shut-off valve 8, which is controlled by a control device not represented.
  • a feed line 7 with a means 8 can be provided for each nozzle 4. It is however also possible to serve a plurality of nozzles 4 with one feed line 7 and to provide this feed line 7 with a means 8, for example one feed line 7 serves all nozzles 4. Feed line 7 thereby branches before nozzles 4 corresponding to the number of nozzles 4 to be served.
  • water vapour or a water-vapour/air mixture can be used as an oxygen-containing gas.
  • Water vapour or a water-vapour/air mixture usually has a higher pressure compared to atmospheric pressure. A means for increasing the pressure of this medium can thus be dispensed with and a reduction in efficiency can thus be avoided.
  • Processes e.g. pyrite and zinc-blende roasting, sulphur burning or acid cleavage, can be carried out with the present heat recovery steam generator and the method for operating such a heat recovery steam generator.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

Abstract

L'invention porte sur un générateur de vapeur à chaleur perdue (1) destiné à refroidir des gaz perdus chauds (5) issus de processus métallurgiques, dans lequel le générateur de vapeur à chaleur perdue (1) contient au moins une chambre de radiation (2) et, dans la partie avant (3) de la chambre de radiation (2), des buses (4) munies de conduites d'amenée (7) aboutissant aux buses (4) pour amener un gaz contenant de l'oxygène (6) à la chambre de radiation (2), et dans lequel le mélange du gaz contenant de l'oxygène (6) avec le gaz perdu (5) s'effectue au moyen du gaz contenant de l'oxygène injecté (6), et des réactions ultérieures sont déclenchées sur des constituants du gaz perdu (5), et/ou les conduites d'amenée (7) des buses (4) sont équipées de moyens (8) qui effectuent une amenée pulsatoire du gaz contenant de l'oxygène (6). L'invention porte aussi sur un procédé de commande d'un tel générateur de vapeur à chaleur perdue (figure 1).
PCT/IB2012/000770 2011-04-20 2012-04-17 Générateur de vapeur à récupération de chaleur et procédé pour commander un générateur de vapeur à récupération de chaleur WO2012143783A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201110002205 DE102011002205A1 (de) 2011-04-20 2011-04-20 Abhitze-Dampferzeuger sowie ein Verfahren zum Betreiben eines Abhitze-Dampferzeugers
DE102011002205.8 2011-04-20

Publications (2)

Publication Number Publication Date
WO2012143783A2 true WO2012143783A2 (fr) 2012-10-26
WO2012143783A3 WO2012143783A3 (fr) 2013-11-07

Family

ID=46028012

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2012/000770 WO2012143783A2 (fr) 2011-04-20 2012-04-17 Générateur de vapeur à récupération de chaleur et procédé pour commander un générateur de vapeur à récupération de chaleur

Country Status (2)

Country Link
DE (1) DE102011002205A1 (fr)
WO (1) WO2012143783A2 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015117718A1 (de) * 2015-10-19 2017-04-20 Karlsruher Institut für Technologie Feuerungssystem und Verfahren zu dessen Betrieb

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB402934A (en) * 1932-12-01 1933-12-14 Kai Petersen New or improved method of and apparatus for admitting secondary combustion air into the combustion chambers of furnaces
FI74738C (fi) * 1986-05-09 1988-03-10 Outokumpu Oy Foerfarande och anordning foer att minska stoftagglomerater vid behandling av gaser av smaeltningsugnen.
FI80781C (fi) * 1988-02-29 1991-11-06 Ahlstroem Oy Saett foer aotervinning av vaerme ur heta processgaser.
JPH09296902A (ja) * 1996-05-02 1997-11-18 Mitsubishi Heavy Ind Ltd 廃熱ボイラ用空気吹き込みノズル
FI110874B (fi) * 2001-12-13 2003-04-15 Outokumpu Oy Menetelmä ja laitteisto metallurgisen sulatusuunin jätelämpökattilan kapasiteetin nostamiseksi
EP1726877B1 (fr) * 2002-04-03 2008-08-13 Keppel Seghers Holdings Pte Ltd Méthode et appareillage pour contrôler l'injection d'air primaire et d'air secondaire d'un incinérateur de déchets
JP4075667B2 (ja) * 2003-03-31 2008-04-16 三菱マテリアル株式会社 排ガスボイラー、排ガス冷却用スプレー装置、製錬設備及び排ガスの冷却方法
FI120158B (fi) * 2007-12-17 2009-07-15 Outotec Oyj Menetelmä ja laitteisto suspensiosulatusuunin poistokaasujen käsittelemiseksi

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Also Published As

Publication number Publication date
DE102011002205A1 (de) 2012-10-25
WO2012143783A3 (fr) 2013-11-07

Similar Documents

Publication Publication Date Title
EP1848927B1 (fr) Injecteur multifonction et procede de combustion l'utilisant pour un traitement metallurgique dans un four a arc electrique
US4440100A (en) Method of introducing additive into a reaction gas flow
US8333852B2 (en) Method for conditioning process gases for the heat treatment of metallic work pieces in industrial furnaces
KR100937947B1 (ko) 금속, 금속 용탕, 및/또는 슬래그의 건식 야금처리 방법및 주입장치
RU2221737C2 (ru) Способ частичного окисления углеводородов и предназначенная для его осуществления горелка
JP2016524654A5 (fr)
US8309016B2 (en) Shaft furnace and method for operating a furnace
KR101700078B1 (ko) 향상된 침지식 연소를 위한 상부 침지식 주입 랜스
JP2005529235A5 (fr)
US9157682B2 (en) Furnace atmosphere generator
WO2012143783A2 (fr) Générateur de vapeur à récupération de chaleur et procédé pour commander un générateur de vapeur à récupération de chaleur
CN112944362A (zh) 旋风式等离子体熔融炉、熔融处理系统及其工作方法
RU2580684C2 (ru) Способ и устройство для получения ацетилена и синтез-газа
RU2210601C2 (ru) Способ восстановления и плавления металла
BR112013015528B1 (pt) Processo baseado em banho fundido para reduzir por meio direto material metalífero
JP2015097987A (ja) 気体処理装置および排ガス処理方法
CN100573009C (zh) 一种喷烧器及由该喷烧器向熔炉中供应物质的方法
RU2361927C1 (ru) Устройство для получения железа или стали из железоокисных материалов
JP2007262293A (ja) コークス乾式消火設備の冷却方法
JP4792574B2 (ja) 重質油改質システム及び重質油利用ガスタービン発電システム
US9816154B2 (en) Process gas preparation apparatus for an industrial furnace system and an industrial furnace system for gas carburizing and hardening of metal workpieces utilizing same
US3179392A (en) Heat and gas barrier for muffle furnaces
US2526473A (en) giu-iland
KR20130136190A (ko) 마이크로파를 이용한 유체가열장치
CN205528606U (zh) 一种裂解炉

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12719057

Country of ref document: EP

Kind code of ref document: A2

122 Ep: pct application non-entry in european phase

Ref document number: 12719057

Country of ref document: EP

Kind code of ref document: A2