EP1818610A1 - Chaudière de récupération avec des parois de déflection - Google Patents

Chaudière de récupération avec des parois de déflection Download PDF

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Publication number
EP1818610A1
EP1818610A1 EP06001910A EP06001910A EP1818610A1 EP 1818610 A1 EP1818610 A1 EP 1818610A1 EP 06001910 A EP06001910 A EP 06001910A EP 06001910 A EP06001910 A EP 06001910A EP 1818610 A1 EP1818610 A1 EP 1818610A1
Authority
EP
European Patent Office
Prior art keywords
waste heat
heat boiler
gas
gasumlenkwände
gasumlenkwand
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Withdrawn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
EP06001910A
Other languages
German (de)
English (en)
Inventor
Jürgen Praast
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.)
Oschatz GmbH
Original Assignee
Oschatz GmbH
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 Oschatz GmbH filed Critical Oschatz GmbH
Priority to EP06001910A priority Critical patent/EP1818610A1/fr
Publication of EP1818610A1 publication Critical patent/EP1818610A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • 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
    • F22B1/1838—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 the hot gas being under a high pressure, e.g. in chemical installations
    • F22B1/1846—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 the hot gas being under a high pressure, e.g. in chemical installations the hot gas being loaded with particles, e.g. waste heat boilers after a coal gasification plant
    • 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
    • F22B1/1869—Hot gas water tube boilers not provided for in F22B1/1807 - F22B1/1861
    • F22B1/1876—Hot gas water tube boilers not provided for in F22B1/1807 - F22B1/1861 the hot gas being loaded with particles, e.g. dust
    • 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
    • F22B37/40—Arrangements of partition walls in flues of steam boilers, e.g. built-up from baffles

Definitions

  • the invention relates to a waste heat boiler for cooling gases, in particular for cooling hot process gases from melting furnaces, for example, from melting furnaces for the recovery of (pure) copper.
  • waste heat boilers of the type mentioned are known, in particular in the form of horizontally arranged waste heat boilers from a radiation section and a subsequent to the radiation section convection section.
  • the gas first flows through the radiation section and then through the convection section, essentially in the horizontal direction.
  • the hot process gases flow mainly along the ceiling of the waste heat boiler.
  • a large part of the cooling surfaces of the waste heat boiler is used only insufficiently.
  • secondary reactions take place in the process gases, especially in the rear area of the boiler, which results in increased dust accumulation and disadvantageous caking in the rear boiler area.
  • the invention teaches a waste heat boiler for cooling gases, in particular for cooling hot process gases from melting furnaces, wherein in the waste heat boiler a plurality of cooled, transversely to the flow direction of the gas oriented Gasumlenkhandn is arranged.
  • the fact that the Gasumlenkpurpose are arranged transversely to the flow direction means in the invention that the Gasumlenkpurpose are arranged transversely to the resulting main flow direction of the gas.
  • the surface of a gas deflecting wall is preferably oriented perpendicularly or substantially perpendicular to the flow direction or main flow direction of the gas.
  • the Gasumlenkpurpose invention are completely disposed in the radiant section of the waste heat boiler.
  • the arrangement of Gasumlenkportion in the radiation section according to the invention is essential to avoid disturbing reactions in the rear part of the waste heat boiler.
  • at least one gas deflecting wall or gas deflecting walls are also arranged in the inlet region or in the first partial region of the convection section. This use of the gas deflection walls takes place, in particular, on the soiling or caking that easily occurs in this transitional area and the easy cleaning possibility of these gas deflection walls (explained in more detail below).
  • an advantageous gas guidance can be achieved.
  • the height of the Gasumlenkwand corresponds accordingly to the vertical height or the extent of the extension of Gasumlenkwand between the bottom and the ceiling of the waste heat boiler or the radiation section.
  • a preferred embodiment of the invention is characterized in that, when the gas deflecting walls are projected onto a plane perpendicular to the main flow direction of the gas, the deflecting walls extend over the entire width of the waste heat boiler or of the radiation section.
  • the invention is based on the finding that with the cooled gas deflecting walls according to the invention on the one hand a very advantageous equalization of the gas flow or a largely uniform flow distribution and on the other hand a very effective cooling of the hot gases can be achieved. Particular importance is attached to the fact that a plurality of individual Gasumlenkumblen is used.
  • the inventive design of the waste heat boiler ensures optimal utilization of the cooling surfaces.
  • the advantages achieved according to the invention also require that the waste heat boiler can be designed in a less complicated and, above all, shorter length compared with waste heat boilers known from the prior art.
  • the arrangement of the Gasumlenkpurpose has proven in the radiation section of a waste heat boiler and in particular in the front or middle region of the radiation section.
  • each Gasumlenkwand on at least one Manipulierelement which is mechanically acted upon for a knock cleaning this Gasumlenkwand.
  • a knock cleaning is expediently carried out by impacts on the at least one manipulating element, whereby dirt, caking and the like detach from the gas deflecting wall.
  • the blows on a manipulating preferably take place with a drivable hammer or monkey.
  • a manipulating element has, for example, a tappet, which acts on the associated gas deflecting wall when knocking occurs.
  • the manipulating elements are expediently not firmly connected to the associated gas deflecting walls, but are connected via separately guided intermediate elements.
  • a Gasumlenkwand is through a slot in the wall of the waste heat boiler or the radiation section in the waste heat boiler or radiation section can be introduced with the proviso that the at least one of these Gasumlenkwand associated manipulation is outside the waste heat boiler or radiation section.
  • a Gasumlenkwand can thus be introduced in particular through a slot in the ceiling of the waste heat boiler or radiation section in the waste heat boiler or radiation section or introduced through a side slot in a side wall of the waste heat boiler or radiation section in the waste heat boiler / radiation section.
  • each gas deflecting wall projects outwardly from the waste heat boiler or from the radiation section, so that it can be acted upon in particular by a drivable monkey hammer for performing a knock cleaning. It is within the scope of the invention that each Gasumlenkwand can be individually or separately subjected to such a knock cleaning. Insofar, the invention is also based on the finding that such individual gas deflecting walls or wall segments can be cleaned more effectively in the course of a knock cleaning than larger walls, which extend, for example, over the entire width of the waste heat boiler.
  • a Gasumlenkwand is formed from at least one cooling tube, or is essentially formed from at least one cooling tube, which is flowed through by a fluid medium.
  • the at least one cooling tube is expediently wound to a cooling coil lying in a plane or substantially lying in a plane, which forms the gas deflection wall.
  • a Gasumlenkwand is formed by a plurality of cooling tubes, which are each wound into a cooling coil, the cooling coils are expediently in a plane or substantially in a plane.
  • the wound cooling tubes or cooling coils span the surface of a gas deflecting wall.
  • At least one substantially gap-free closed gas deflection wall is provided in the waste heat boiler or, preferably, in the radiation section.
  • Closed Gasumlenkwand here means in particular that the cooling tubes forming the Gasumlenkpurpose are directly and substantially gap-free together and that the gap width between the cooling tubes is not more than 5 mm, preferably not more than 4 mm and very preferably only 1 to 3 mm. In a closed Gasumlenkwand so expediently no major or further column are available.
  • At least one open Gasumlenkwand provided with at least one fürströmspalt for the gas in the waste heat boiler or in the radiation section.
  • Open Gasumlenkwand means that the Gasumlenkwand has at least one fürströmspalt, which expediently has a gap width of more than 10 mm.
  • Such fürströmspalt is preferably formed as a vertically extending fürströmspalt and preferably, the open Gasumlenkwand a plurality of skillsströmspalten or vertical skillsströmspalten on.
  • the skillsströmspalte are arranged parallel or substantially parallel to each other.
  • the gap width of the naturalströmspalte is more than 20 mm, preferably more than 30 mm and preferably more than 50 mm. According to one embodiment of the invention, the gap width of the naturalströmspalte is greater than 100 mm and is for example 150 to 200 mm.
  • a preferred embodiment of the invention is characterized in that in an open Gasumlenkwand a plurality of cooling tubes is combined to form adesch Wegaggregat and that between aggregate sections of thisdesch Wegaggregates the fürströmspalte is formed.
  • expediently a plurality of cooling tubes wound parallel to cooling coils that form the cooling coil unit.
  • the turboströmspalte are formed between linear aggregate sections of this cooling coil unit, which are preferably provided as a vertical and parallel fürströmspalte.
  • the linear aggregate sections are expediently formed by directly adjoining linear cooling tube sections.
  • two to ten cooling tubes, preferably two to eight cooling tubes and preferably three to six cooling tubes are wound to the corresponding number of cooling coils or to the cooling coil unit.
  • a plurality of naturalströmspalten preferably a plurality of vertical and mutually parallel fürströmspalten is provided between aggregate sections of the cooling coil unit.
  • At least two Gasumlenkumble offset in the flow direction of the gas are arranged one behind the other in the waste heat boiler or in the radiation section. Due to the staggered arrangement of the Gasumlenkscene an optimal homogenization of the gas stream can be achieved and it will be generated or accelerated in an advantageous manner post-reactions. Furthermore, by the staggered arrangement of the Gasumlenkpurpose the pressure loss in the waste heat boiler or in the radiation section can be set effectively and precisely.
  • At least two Gasumlenktries are arranged side by side.
  • the side edge of a Gasumlenkwand connects to the side edge of another Gasumlenkwand.
  • the adjoining Gasumlenkpurpose close without a major intermediate gap - side edge to side edge - to each other.
  • the width of the intermediate gap is preferably less than 10 mm, preferably less than 8 mm and particularly preferably less than 5 mm.
  • Fig. 1 shows a waste heat boiler 1 according to the invention in a horizontal arrangement.
  • the waste heat boiler 1 has a radiation section 2 with a gas inlet opening 3.
  • the gas inlet opening 3 is connected in a manner not shown to a melting furnace, get from the hot process gases through the gas inlet opening 3 in the waste heat boiler 1 and in the radiation section 2.
  • the hot process gases are cooled in the waste heat boiler 1.
  • a convection section 4 connects in the usual way to the radiation section 2.
  • the hot process gas flows through the waste heat boiler according to FIG. 1 in the horizontal direction.
  • the flow direction or main flow direction of the gas was indicated here by a double arrow.
  • FIG. 2 further shows that each gas deflecting wall 5, 6 has manipulating elements 9 which can be acted upon mechanically for a knocking-out of the respective gas deflecting wall 5, 6.
  • drivable hammers 10 are provided in the exemplary embodiment (FIG. 2), which act on the manipulating elements 9 during a knocking-out of the respective gas deflecting wall 5, 6 with impacts.
  • FIG. 2 it is clear that the Manipulieriata 9 of Gasumlenkpurpose 5, 6 protrude from the ceiling 7 or from the side walls 8 of the radiation section 2 to the outside. It can also be seen that, due to the arrangement according to the invention, each gas deflecting wall 5, 6 can be subjected to a separate knock cleaning.
  • a Gasumlenkwand 5, 6 of cooling tubes 11 is formed, which are flowed through by the cooling of the hot gas from a fluid medium.
  • the cooling tubes 11 are wound into cooling coils 12 which lie in one plane or lie substantially in one plane and, as it were, span the surfaces of the gas deflection walls 5, 6.
  • FIG. 3 The embodiment according to FIG. 3 is similar to the embodiment of the invention shown in FIGS. 1 and 2. However, in FIG. 3 four open Gasumlenkani 6 are arranged side by side. Otherwise, the arrangement in Fig. 3 corresponds to the arrangement shown in Figs. 1 and 2. The flow of the gas past the Gasumlenk professionn 5, 6 or through the open Gasumlenktouch 6 is indicated in Fig. 3 as well as in the other figures by simple arrows.
  • Gasumlenkwall 5, 6 in the flow direction or in the main flow direction of the gas offset from each other are arranged.
  • Such offset arrangements are shown in FIGS. 4 to 9.
  • FIGS. 4 and 5 four closed Gasumlenksley 5 are present.
  • the two inner Gasumlenkani 5 are arranged in front and side by side, while the two outer Gasumlenkani 5 are arranged offset in the flow direction of the gas to the rear.
  • the two outer Gasumlenkani 5 arranged front and the two inner Gasumlenkani 5 offset to the rear and arranged side by side.
  • FIG. 6 essentially corresponds to the embodiment according to FIG. 4, the two outer gas deflection walls 6 offset to the rear but being open gas deflection walls 6.
  • FIG. 7 is similar to the embodiment of FIG. 4, wherein in Fig. 7, the two front juxtaposed Gasumlenkany 6 are open Gasumlenkani 6.
  • the four closed gas deflecting walls 5 from FIG. 5 are completely replaced by four open gas deflecting walls 6.
  • FIG. 9 basically corresponds to the embodiment according to FIG. 5, but in FIG. 9 all closed gas deflecting walls from FIG. 5 are replaced by open gas deflecting walls 6.
  • FIG. 10 and 11 show two embodiments of a waste heat boiler 1 according to the invention in a vertical arrangement in the side view.
  • FIG. 10 two Gasumlenkuse 5, 6 can be seen. It is understood that also here in a manner not shown transversely to the flow direction in each case a plurality of Gasumlenkani 5, 6 can be arranged side by side.
  • the waste heat boiler 1 shown in FIGS. 10 and 11 have two vertical sections 15 and 16. In the embodiment of FIG. 10, a gap 17 between these vertical sections 15 and 16 is provided. In contrast, in the embodiment of FIG. 11 instead of the gap 17 adjoining Gasumlenkring 5, 6 between the two vertical sections 15, 16 are provided. As a result, the gap 17 is saved and the waste heat boiler 1 can be performed less expensive overall and less material consuming.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chimneys And Flues (AREA)
EP06001910A 2006-01-31 2006-01-31 Chaudière de récupération avec des parois de déflection Withdrawn EP1818610A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP06001910A EP1818610A1 (fr) 2006-01-31 2006-01-31 Chaudière de récupération avec des parois de déflection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06001910A EP1818610A1 (fr) 2006-01-31 2006-01-31 Chaudière de récupération avec des parois de déflection

Publications (1)

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EP1818610A1 true EP1818610A1 (fr) 2007-08-15

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2339278A1 (fr) * 2009-12-18 2011-06-29 Oschatz Gmbh Dispositif d'enrichissement de cuivre ou de nickel

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1029072A (en) * 1962-04-28 1966-05-11 Viessmann Hans Hot-water boiler
US3289642A (en) * 1963-09-23 1966-12-06 Schoppe Fritz Boiler for the heating or vaporization of a liquid medium
DE2245261A1 (de) * 1972-09-15 1974-04-04 Vorkauf Heinrich Lenkwandanordnung in einem ausbrennoder feuerraum eines waermetauschers
US4355602A (en) * 1981-08-10 1982-10-26 Cedar Dunes Investments Ltd. Boiler
FR2825776A1 (fr) * 2001-06-07 2002-12-13 Alstom Power Nv Chaudiere du type comprenant, apres un foyer, dans une partie horizontale de la chaudiere, une serie d'echangeurs

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1029072A (en) * 1962-04-28 1966-05-11 Viessmann Hans Hot-water boiler
US3289642A (en) * 1963-09-23 1966-12-06 Schoppe Fritz Boiler for the heating or vaporization of a liquid medium
DE2245261A1 (de) * 1972-09-15 1974-04-04 Vorkauf Heinrich Lenkwandanordnung in einem ausbrennoder feuerraum eines waermetauschers
US4355602A (en) * 1981-08-10 1982-10-26 Cedar Dunes Investments Ltd. Boiler
FR2825776A1 (fr) * 2001-06-07 2002-12-13 Alstom Power Nv Chaudiere du type comprenant, apres un foyer, dans une partie horizontale de la chaudiere, une serie d'echangeurs

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2339278A1 (fr) * 2009-12-18 2011-06-29 Oschatz Gmbh Dispositif d'enrichissement de cuivre ou de nickel

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