EP2087281B1 - Procédé et dispositif pour l'élimination par purge des matières solides se déposant sur un fond à tubes - Google Patents

Procédé et dispositif pour l'élimination par purge des matières solides se déposant sur un fond à tubes Download PDF

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Publication number
EP2087281B1
EP2087281B1 EP07819879.3A EP07819879A EP2087281B1 EP 2087281 B1 EP2087281 B1 EP 2087281B1 EP 07819879 A EP07819879 A EP 07819879A EP 2087281 B1 EP2087281 B1 EP 2087281B1
Authority
EP
European Patent Office
Prior art keywords
tube bottom
tubing
bores
cooling water
boiler
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.)
Active
Application number
EP07819879.3A
Other languages
German (de)
English (en)
Other versions
EP2087281A2 (fr
Inventor
Reinhard Michel
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.)
ThyssenKrupp Industrial Solutions AG
Original Assignee
ThyssenKrupp Uhde GmbH
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Filing date
Publication date
Application filed by ThyssenKrupp Uhde GmbH filed Critical ThyssenKrupp Uhde GmbH
Publication of EP2087281A2 publication Critical patent/EP2087281A2/fr
Application granted granted Critical
Publication of EP2087281B1 publication Critical patent/EP2087281B1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/48—Devices for removing water, salt, or sludge from boilers; Arrangements of cleaning apparatus in boilers; Combinations thereof with boilers
    • F22B37/52—Washing-out devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/48—Devices for removing water, salt, or sludge from boilers; Arrangements of cleaning apparatus in boilers; Combinations thereof with boilers
    • F22B37/54—De-sludging or blow-down devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/56—Boiler cleaning control devices, e.g. for ascertaining proper duration of boiler blow-down
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/06—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits having a single U-bend
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0229—Double end plates; Single end plates with hollow spaces

Definitions

  • the invention is directed to a method for the blowdown of in particular on a tube plate of a vertical waste heat boiler with a plurality of heat exchanger tubes depositing solids using the cooling water used and to a tube plate used in such a vertical waste heat boiler.
  • the US Pat. No. 3,913,531 or the CA 994 622 A1 as well as the EP 0 132 112 A2 show each other in a different way solutions to the problem of sludge removal on a tube sheet, for example, to avoid corrosion damage, as the US Pat. No. 3,913,531 shows and alternative solutions to the radially inwardly generated forced flow by means of the arrangement of water inlet openings in the inner shirt ( CA 994 622 A1 ).
  • the EP 0 132 112 A2 also shows a permanently mounted cleaning arrangement with obliquely ausgremen nozzles, which is arranged on the tube plate.
  • the blowdown is usually carried out at the bottom of the connected steam drum, possibly with an additional Abschlämmitzkeit the shell emptying of the boiler itself.
  • boiler damage Another factor influencing boiler damage is the concentration of impurities in the boiler feed water, which settle in zones of high steam production. Therefore, boiler damage is always concentrated on the hot legs of the tube bundle while the cold legs remain undamaged. An optimized design for a vertical boiler must therefore consider and optimize all these factors.
  • this object is achieved according to the invention in that a forced flow of the cooling water in the region of the tube bottom surface is effected by a plurality of angles to the vertical, introduced in the tube plate cooling holes.
  • This procedure makes it possible in the center of the tubesheet To provide a drain and thus to use the already existing flow to allow the discharge of impurities in the center of the tube sheet.
  • a forced flow formed transversely to the radial gas flow is formed between the heat exchanger tubes due to the inclined cooling water bores in the tubesheet. That is, from the Berohrungs vom a flow is effected in the radial streets and from there the impurities in the center of the tube sheet and removed via the drain from the system.
  • the invention also provides in further embodiments that, in the case of four radial borehole-free passages, the transverse flow formed between each of the heat exchanger tubes is formed in half to the one adjacent lane and half to the other adjacent lane.
  • Another embodiment of the invention consists in a method according to the invention, which is a waste heat boiler with a Berohrungs Scheme outside at a distance used to boiler wall surrounding interior skirting with cooling water holes in the region of the tube plate, in that the inner skirt is equipped in the region of the non-contacting radial streets withoutdeementzuströmö Maschinenen that is reinforced by the center of the Berohrungsquadranten associated cooling water inlet openings directed to the center of forced flow.
  • the inflow of the cooling water flowing between the inner skirt and the outer wall of the vertical waste heat boiler is used to increase the cleaning effect.
  • the invention also provides a tube sheet, in particular a vertical waste heat boiler with alternating field within a pipe surrounding inner sleeve at a distance from the boiler shell, which is characterized in that in addition to holes for the riser and downpipes in the tube sheet a variety of Angle to the vertical inclined cooling holes are provided in the pipe bend.
  • Embodiments of the tubesheet result from the other subclaims concerning the tubesheet, wherein it can be provided that the tubesheet in the center is provided with an outlet for removing deposits or sludges that have been washed away.
  • the projection of the cooling holes is aligned in the tube bottom plane perpendicular to the nearest radial lane and / or that formed by four radial lanes Berohrungsquadranten each half of the cooling holes of a quadrant of the adjacent Radialgasse is assigned.
  • a generally designated 1 vertical heat recovery boiler Fig. 1 has in addition to the heat exchanger tubes 2 a generally designated 3 tubesheet, fed via horizontal bores 4, 5 cooling holes.
  • Fig. 1 is also indicated that at a distance from the outer wall of the boiler 6, a riser and downpipes 2 surrounding so-called inner skirt 7 is provided, the inner skirt 7 in the region of the tube bottom cooling water inlet openings 8, through which flows in the shell space between the outer shell wall 6 and inner skirt 7 downward Cooling water can enter the inner Berohrungs Symposium.
  • Fig. 2 shows a partial cross section through a tube sheet 3.
  • the tube sheet 3 in the center of a drain 9, can be flushed through the impurities.
  • Fig. 3 In the supervisory drawing of Fig. 3 is indicated that between the riser and downpipes four radially formed no-hole streets, in Fig. 4 designated 10, are formed so that Berohrungs quadrant, by 11 in Fig. 3 indicated, train.
  • the horizontal bores are arranged in each case one half of a quadrant 11 in a manner parallel to the adjacent lane 10a and 10b, and each half offset by 90 ° C. So is in Fig. 3 the one direction of the horizontal bores denoted by 4a, those of the other direction by 4b. Close to these horizontal bores, the inclined cooling water bores in such a way that the inclination is aligned in the direction of the nearest nearest non-corrugated lane 10, each resulting in cross flows, represented by small arrows 12 in Fig. 4 , wherein the currents in the non-rotating radial passages 10 are indicated by small arrows 13.
  • the cooling water inlet openings 8 in the inner shirt 7 can be provided so that they act on the central region of each quadrant. This area is in Fig. 4 indicated by double arrows 14, so that there is an additional flow through the inflowing cooling water, with arrows 15 in Fig. 4 is indicated.
  • cooling holes surrounding the riser and downpipes can not only be introduced inclined in the pipe bend in the manner described here, they may also have different from the inside outward inclinations such that there is a kind of spiral flow from outside to inside u. like. More.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Cleaning In General (AREA)

Claims (12)

  1. Procédé de purge de substances solides se déposant sur un plateau à tubes d'une chaudière à récupération de chaleur verticale dotée d'une pluralité de tubes échangeurs de chaleur à l'aide de l'eau de refroidissement utilisée,
    caractérisé en ce que :
    une pluralité d'orifices de refroidissement ménagés dans le plateau à tubes et disposés dans l'angle avec la verticale permettent de provoquer un courant forcé de l'eau de refroidissement dans la zone de la surface du plateau à tubes.
  2. Procédé selon la revendication 1,
    caractérisé en ce que :
    le courant forcé est provoqué de l'extérieur vers le centre du plateau à tubes présentant un trop-plein.
  3. Procédé selon la revendication 1 ou la revendication 2,
    caractérisé en ce que :
    il est prévu, dans le cas d'une chaudière à récupération de chaleur verticale munie d'une tuyauterie à champ alternatif, au moins deux gaz radiaux sans tuyauterie allant de l'extérieur vers le centre du plateau à tubes, dans lequel un courant forcé est refoulé de l'extérieur vers le centre du plateau à tubes dans les gaz passant à travers les orifices d'eau de refroidissement installés dans l'angle.
  4. Procédé selon l'une quelconque des revendications précédentes,
    caractérisé en ce que :
    il est formé entre les tubes échangeurs de chaleur en raison des trous d'eau de refroidissement inclinés dans le plateau de tubes un courant forcé formé transversalement au courant de gaz radiaux.
  5. Procédé selon l'une quelconque des revendications précédentes,
    caractérisé en ce que :
    dans le cas de quatre gaz radiaux sans tuyauterie, le courant transversal formé respectivement par quadrant de tuyauterie entre les tubes échangeurs de chaleur est conformé pour moitié en gaz limitrophes et pour moitié en autres gaz limitrophes.
  6. Procédé selon l'une quelconque des revendications précédentes dans une chaudière à récupération de chaleur avec une tôle de chemisage entourant la zone de tuyauterie, à l'extérieur, à distance de la paroi externe de la chaudière avec des ouvertures d'entrée d'eau de refroidissement dans la zone du plateau de tubes,
    caractérisé en ce que :
    la chemise interne dans la zone des gaz radiaux sans tuyauterie est équipée sans ouvertures d'amenée d'eau de refroidissement de sorte que le courant forcé dirigé vers le centre soit renforcé par les ouvertures d'entrée d'eau de refroidissement affectées à la zone centrale des quadrants de tuyauterie.
  7. Plateau de tubes (3), en particulier d'une chaudière à récupération de chaleur verticale avec une tuyauterie à champ alternatif dans une chemise interne entourant la tuyauterie à distance de l'enveloppe de la chaudière,
    caractérisé en ce que :
    il est prévu, à côté d'orifices pour les tubes montants et descendants (2), dans le plateau de tubes (3), une pluralité d'orifices de refroidissement (5) inclinés dans l'angle avec la verticale.
  8. Plateau de tubes selon la revendication 7,
    caractérisé en ce que :
    le plateau de tubes (3) est pourvu au centre d'un trop-plein (9) pour éliminer les dépôts rincés ou les boues.
  9. Plateau de tubes selon la revendication 7 ou la revendication 8,
    caractérisé en ce que :
    il est prévu, entre au moins deux champs de tuyauterie, des gaz (10) dirigés radialement de l'extérieur vers l'intérieur sans tubes montants ni descendants avec des orifices de refroidissement (5) dans le plateau de tubes (3) pour produire un courant forcé de réfrigérant de l'extérieur à l'intérieur de la chaudière à récupération de chaleur (1) dans la zone du plateau de tubes (3).
  10. Plateau de tubes selon l'une quelconque des revendications 7 à 9,
    caractérisé en ce que :
    les orifices de refroidissement (5) affectés aux tubes échangeurs de chaleur (2) présentent dans le plateau de tubes une position angulaire s'écartant de la verticale, dans lequel la projection des orifices de refroidissement (5) dans le plan du plateau de tubes est orientée perpendiculairement au gaz radial le plus proche (10).
  11. Plateau de tubes selon l'une quelconque des revendications précédentes,
    caractérisé en ce que :
    dans le cas de quadrants de tuyauterie (11) formés par quatre gaz radiaux (10), respectivement, la moitié des orifices de refroidissement (4a, 4b) d'un quadrant est affectée au gaz radial voisin (10).
  12. Plateau de tubes selon l'une quelconque des revendications précédentes,
    caractérisé en ce que :
    la chemise interne (7) entourant les tubes échangeurs de chaleur est équipée seulement dans la zone centrale (14) d'un quadrant de tuyauterie respectif (11) avec des ouvertures d'amenée d'eau de refroidissement (8) proches du sol.
EP07819879.3A 2006-12-07 2007-11-21 Procédé et dispositif pour l'élimination par purge des matières solides se déposant sur un fond à tubes Active EP2087281B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006057734.5A DE102006057734B4 (de) 2006-12-07 2006-12-07 Verfahren und Vorrichtung zur Abschlämmung von sich auf einem Rohrboden ablagernden Feststoffen
PCT/EP2007/010060 WO2008067908A2 (fr) 2006-12-07 2007-11-21 Procédé et dispositif pour l'élimination par purge des matières solides se déposant sur un fond à tubes

Publications (2)

Publication Number Publication Date
EP2087281A2 EP2087281A2 (fr) 2009-08-12
EP2087281B1 true EP2087281B1 (fr) 2014-10-01

Family

ID=39431266

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07819879.3A Active EP2087281B1 (fr) 2006-12-07 2007-11-21 Procédé et dispositif pour l'élimination par purge des matières solides se déposant sur un fond à tubes

Country Status (7)

Country Link
EP (1) EP2087281B1 (fr)
JP (1) JP2010521640A (fr)
KR (1) KR101385415B1 (fr)
CN (1) CN101809367B (fr)
DE (1) DE102006057734B4 (fr)
HK (1) HK1142944A1 (fr)
WO (1) WO2008067908A2 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102305395B (zh) * 2011-07-19 2014-05-07 贵州电力试验研究院 带炉水泵的直流锅炉的水冲洗方法

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB190414833A (en) * 1904-07-01 1905-01-26 Marcel Deprez Improvements in Steam Boilers.
GB170991A (en) * 1920-08-26 1921-11-10 Henry Broscombe Improved apparatus for use in washing out locomotive or other boilers
US3913531A (en) * 1974-06-20 1975-10-21 Combustion Eng Sediment blowdown arrangement for a shell and tube vapor generator
CA994622A (en) * 1974-08-15 1976-08-10 Foster Wheeler Limited Heat exchangers
FR2487043A1 (fr) * 1980-07-18 1982-01-22 Framatome Sa Dispositif de decolmatage et de recuperation de boues deposees sur la plaque tubulaire d'un generateur de vapeur
US4566406A (en) * 1983-07-13 1986-01-28 Westinghouse Electric Corp. Sludge removing apparatus for a steam generator
US4715324A (en) * 1985-11-26 1987-12-29 Apex Technologies, Inc. Nuclear steam generator sludge lancing method and apparatus
DE3860607D1 (de) * 1987-11-11 1990-10-18 Siemens Ag Dampferzeuger.
US4972804A (en) * 1989-04-25 1990-11-27 Alexander T. Kindling Method and apparatus for organizing the flow of fluid in a vertical steam generator
CN2172834Y (zh) * 1993-09-30 1994-07-27 杭州极致过滤器制造有限公司 锅炉除盐系统出水装置
JP2589872Y2 (ja) * 1993-12-31 1999-02-03 株式会社千石 熱交換器の霜取構造

Also Published As

Publication number Publication date
CN101809367B (zh) 2012-12-26
DE102006057734A1 (de) 2008-06-26
EP2087281A2 (fr) 2009-08-12
WO2008067908A2 (fr) 2008-06-12
KR101385415B1 (ko) 2014-04-14
DE102006057734B4 (de) 2014-09-11
JP2010521640A (ja) 2010-06-24
HK1142944A1 (en) 2010-12-17
CN101809367A (zh) 2010-08-18
WO2008067908A3 (fr) 2010-04-29
KR20090096447A (ko) 2009-09-10

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