EP0611270A1 - Verfahren zum Vorwärmen eines gasförmigen Mediums - Google Patents

Verfahren zum Vorwärmen eines gasförmigen Mediums Download PDF

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Publication number
EP0611270A1
EP0611270A1 EP94870014A EP94870014A EP0611270A1 EP 0611270 A1 EP0611270 A1 EP 0611270A1 EP 94870014 A EP94870014 A EP 94870014A EP 94870014 A EP94870014 A EP 94870014A EP 0611270 A1 EP0611270 A1 EP 0611270A1
Authority
EP
European Patent Office
Prior art keywords
gaseous fluid
central part
distributor
heated
cells
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.)
Ceased
Application number
EP94870014A
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English (en)
French (fr)
Inventor
Antoine Gerard
Francis Van De Walle
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.)
Distrigaz SA
Original Assignee
Distrigaz SA
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 Distrigaz SA filed Critical Distrigaz SA
Publication of EP0611270A1 publication Critical patent/EP0611270A1/de
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B9/00—Stoves for heating the blast in blast furnaces
    • C21B9/10—Other details, e.g. blast mains
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
    • F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
    • F27B3/26—Arrangements of heat-exchange apparatus
    • F27B3/263—Regenerators
    • 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
    • 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
    • F28D17/00—Regenerative heat-exchange apparatus in which a stationary intermediate heat-transfer medium or body is contacted successively by each heat-exchange medium, e.g. using granular particles

Definitions

  • the present invention relates to a device for heating a gaseous fluid, based on the principle of alternating regenerative exchange.
  • the heating of a gaseous fluid by an alternating regenerative exchange consists in alternating, with an appropriate periodicity, passing on the one hand hot heating gases and on the other hand a cold gaseous fluid to be heated, over a thermal mass which , in this way, successively accumulates and gives up a determined quantity of heat.
  • the thermal mass can be in the form of a packed bed of particles, or in the form of an ordered lining of balls, ribbed plates or in any other suitable form.
  • BE-A-755952 and BE-A-767786 a method and a device for heating reformed gas intended to be injected into a tank furnace, respectively.
  • This device consists of two separate cells, each comprising at least one burner for heating the thermal mass.
  • the two cells are joined by a pipe which does not include a hot valve.
  • the two simultaneous phases respectively of heat accumulation in the thermal mass of a cell and of heat transfer by the thermal mass of the other cell, take place under slightly different pressures to ensure their separation.
  • the heated gas is collected by a single pipe opening either in the connection pipe between the two cells in the case of the first device, or between the two groups of burners, in the central part of the single enclosure of the second device.
  • the present invention aims to provide a device for heating a gaseous fluid which does not have the aforementioned drawbacks while retaining a heating capacity at least equivalent to that of known devices.
  • the device of the invention will even offer greater flexibility of construction.
  • a device for reheating a gaseous fluid which comprises at least two cells connected to each other by a central part, the assembly being furnished with a thermal mass, and which is equipped with introduction means gaseous fluid to be heated, means for extracting the heated gaseous fluid, means for introducing a hot heating gas and means for discharging the cooled heating gas, is characterized in that said means for introducing of said gas hot heaters are constituted by a distributor common to the cells, in that said common distributor is arranged in said central part and in that the means for extracting the heated gaseous fluid comprise a pipe connected to a manifold which also opens in said central part.
  • this common distributor can be constituted by at least one orifice open in said central part and communicating with one or more sources of very hot gases (for example combustion chambers, equipped with burners) located preferably in the immediate vicinity of said central part.
  • the common distributor which opens into the central part of the enclosure, can take different forms, for example that of a perforated peripheral channel segment.
  • said hot heating gas is generally constituted by gaseous combustion products and that the fuel used to produce it can be gaseous, liquid or solid, or even consist of a mixture of fuels; it suffices that the gaseous combustion products do not quickly clog the thermal mass of the cells.
  • the oxidizer used for this combustion can be either air or air enriched with oxygen, or even pure oxygen.
  • the manifold intended to extract the heated gaseous fluid can be opened by a single orifice or by a group of orifices in said central part.
  • This collector can for example be in the form of one or more perforated peripheral channel segments.
  • the cells can be arranged relative to one another or to each other according to different configurations and different orientations.
  • the cells can in particular be arranged either in a single enclosure, or in separate enclosures.
  • the single enclosure is generally tubular. It can be straight or have various shapes such as a V or U shape, preferably symmetrical, or a curved shape, for example in an arc.
  • the cells are arranged in the end regions of the enclosure, on either side of an intermediate region which constitutes the abovementioned central part.
  • connection zone which constitutes the abovementioned central part.
  • the device comprises deflection means located in said central part, between said means for introducing the heating gas and said means for extracting the heated gaseous fluid.
  • These deflection means may for example consist of a plate of refractory material, disposed between the distributor of heating gas and the collector of the heated gaseous fluid.
  • the shape of this plate is preferably adapted to that of the heating gas distributor and / or to that of the heated gaseous fluid manifold.
  • said common distributor of hot heating gas advantageously has at least two operating modes, namely a high speed and a low speed, for example by means of one or more main burners and a pilot burner.
  • the heating device is also provided with supply and evacuation pipes for the various gases, as well as with the regulating members necessary to ensure its correct operation. This operation, in particular the heating inversion and cell purging operations, will be described in detail below.
  • a device for heating a gaseous fluid under pressure comprising a single enclosure (1), vertical, of circular section and closed at its two ends.
  • This enclosure is internally lined with a refractory protective coating (2), with a neck in the central part of the enclosure.
  • This neck divides the interior volume of the enclosure (1) into two cells (A) and (B), without material separation between the two cells.
  • the interior volume of the enclosure (1), including the neck region, is completely filled with a thermal mass (3), that is to say a material capable of accumulating heat, for example alumina beads.
  • the source of heating gas consists of a chamber (21) which opens into the enclosure (1) by a distributor (22).
  • the chamber (21) is directly equipped with a burner (23), which is supplied with fuel (11) and combustion air (7) from suitable sources.
  • the distributor (22) may have a single or more orifices opening out inside the enclosure (1).
  • a valve (9) and a blower or a compressor (8) In the air supply pipe (7) of the burner (23), there is provided a valve (9) and a blower or a compressor (8).
  • the fuel supply (11) of the burner (23) comprises a main supply, with a valve (120), to ensure the operation of the burner at high speed, that is to say at full power. It also has a bypass with a valve (121), to ensure the operation of the burner at low speed, that is to say at reduced power.
  • a valve (120) to ensure the operation of the burner at high speed, that is to say at full power.
  • a valve (121) to ensure the operation of the burner at low speed, that is to say at reduced power.
  • the operation at reduced power could of course correspond to the stopping of part of these burners.
  • the means for extracting the heated gaseous fluid essentially consist of a pipe (6) opening into the enclosure (1), by a manifold (15).
  • a source (4) of gaseous fluid to be heated for example air, is connected to the cells (A) and (B) by pipes comprising the valves (50) and (51) respectively.
  • the cooled heating gases are evacuated from the cells (A) and (B) to a chimney (25) by pipes comprising the valves (130) and (131) respectively.
  • An expansion turbine (14) can be provided in this pipe, to recover the residual energy from the evacuated heating gases.
  • This device is based on the known principle of alternating regenerative heating, which includes a succession of heating and cooling cycles of thermal masses.
  • valves (50; 131); (9; 120) are open and the valves (51; 130) are closed.
  • the valve (121) is normally open.
  • the gaseous fluid to be heated (4) enters the cell (A) through the valve (5), it crosses the cell (A) from top to bottom while heating in contact with the thermal mass (3) and the gaseous fluid heated leaves the enclosure (1) via the manifold (15) and the pipe (6).
  • the burner (23) operates at high speed and the hot gases which it produces are introduced into the enclosure (1) through the chamber (21) and the distributor (22). These hot gases pass from top to bottom of the cell (B) of which they heat the thermal mass (3) and they leave the enclosure (1) by the valve (131) towards the chimney (25).
  • the duration of this phase is adjusted so as to ensure the desired thermal recharging of the mass (3). It is for example 2 minutes.
  • valves Invert automatically: the valves (51; 130) open and the valves (50; 131) close; the valves (9) and (120) are also open.
  • the gaseous fluid (4) passes from bottom to top of the cell (B) where it heats up in contact with the thermal mass (3) heated during the previous phase.
  • the hot gases produced by the burner (23) pass from bottom to top of the cell (A) where they heat the thermal mass (3), then they leave the enclosure (1) by the valve (130) towards the chimney (25), by ceding their residual energy to the turbine (14).
  • the burner (23) is switched to its low speed operation by closing the valve (120), the valve (121) and the valve (9 ) remaining open normally.
  • the burner (23) thus sends into the cell to be purged highly diluted hot gases which expel the residual hot gases from the previous heating phase.
  • the valve (120) opens and the burner (23) thus returns to its high speed.
  • the heated gaseous fluid present in a cell at the time of the inversion can be recovered, via an intermediate tank (16) which is connected to the pipe (6).
  • Such recovery is justified when the gaseous fluid has a sufficient economic value, for example hydrogen or a reducing gas for blast furnaces.
  • the deflector (24) separates the stream of hot gases produced by the burner (23) from the stream of heated gaseous fluid coming alternately from the cells (A) and (B).
  • Fig. 2 illustrates a symmetrical inverted U configuration of a single enclosure (1) comprising two cells (A) and (B).
  • the heating gas coming from the combustion chamber (21), opens into the enclosure (1) through the distributor (22).
  • a manifold (15) connects the enclosure (1) to the pipe (6) for extracting the heated gaseous fluid.
  • FIG. 3 shows a cross section of the central part of the device of FIG. 1, taken along line I-I.
  • This figure shows the section of the neck of the central part of the enclosure (1), with a common distributor (22) consisting of two segments (221; 222) of perforated peripheral channel and a collector (15) also composed of two segments (151; 152) of perforated peripheral channel.
  • the neck section is divided by a crossed deflector (24), into four parts corresponding respectively to the distributor (221; 222) and collector (151; 152) segments.
  • the directions of circulation of the different gases are indicated by arrows, corresponding to the operation described above.
  • Fig. 4 very schematically shows a heating device made up of four pairs of cells (A; B).
  • a common distributor (22) blows heating gas into the central part of an enclosure (1).
  • the hot gas is deflected by the deflector (24) in the direction of the cells (B) to be heated (white arrows).
  • the gaseous fluid to be heated crosses the cells (A) and is extracted from the device by the manifold (15) and the pipe (6) (black arrows).
  • the invention is not limited to the exemplary embodiments which have just been described and illustrated. It also includes any modification that could be made by a skilled person. In particular, it comprises the combination of several two-cell devices to constitute a device having a larger number of cells, possibly smaller.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
EP94870014A 1993-02-10 1994-01-27 Verfahren zum Vorwärmen eines gasförmigen Mediums Ceased EP0611270A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE9300126A BE1006702A6 (fr) 1993-02-10 1993-02-10 Dispositif de rechauffage d'un fluide gazeux.
BE9300126 1993-02-10

Publications (1)

Publication Number Publication Date
EP0611270A1 true EP0611270A1 (de) 1994-08-17

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP94870014A Ceased EP0611270A1 (de) 1993-02-10 1994-01-27 Verfahren zum Vorwärmen eines gasförmigen Mediums

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EP (1) EP0611270A1 (de)
BE (1) BE1006702A6 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU91572B1 (en) * 2009-05-20 2010-11-22 Wurth Paul Sa Method for operating a regenerative heater.

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2857443A (en) * 1955-07-22 1958-10-21 Phillips Petroleum Co Method of operating a regenerative furnace for chemical conversions
DE1810086A1 (de) * 1967-11-20 1969-08-07 Britisch Oxygen Company Ltd Feuerfester Regenerativofen
US4516934A (en) * 1983-11-25 1985-05-14 Owens-Illinois, Inc. Waste heat recovery from regenerative furnaces
EP0194000A1 (de) * 1985-02-04 1986-09-10 British Gas Corporation Speicherheizanlagen
EP0275859A1 (de) * 1986-12-23 1988-07-27 DISTRIGAZ Société anonyme dite: Druckgasvorwärmer
EP0373450A1 (de) * 1988-12-10 1990-06-20 Klöckner Cra Patent Gmbh Verfahren und Regenerator zum Aufheizen von Gasen

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2857443A (en) * 1955-07-22 1958-10-21 Phillips Petroleum Co Method of operating a regenerative furnace for chemical conversions
DE1810086A1 (de) * 1967-11-20 1969-08-07 Britisch Oxygen Company Ltd Feuerfester Regenerativofen
US4516934A (en) * 1983-11-25 1985-05-14 Owens-Illinois, Inc. Waste heat recovery from regenerative furnaces
EP0194000A1 (de) * 1985-02-04 1986-09-10 British Gas Corporation Speicherheizanlagen
EP0275859A1 (de) * 1986-12-23 1988-07-27 DISTRIGAZ Société anonyme dite: Druckgasvorwärmer
EP0373450A1 (de) * 1988-12-10 1990-06-20 Klöckner Cra Patent Gmbh Verfahren und Regenerator zum Aufheizen von Gasen

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU91572B1 (en) * 2009-05-20 2010-11-22 Wurth Paul Sa Method for operating a regenerative heater.
WO2010133476A1 (en) 2009-05-20 2010-11-25 Paul Wurth S.A. Method for operating a regenerative heater
EA019811B1 (ru) * 2009-05-20 2014-06-30 Поль Вурт С.А. Способ эксплуатации регенеративного нагревателя
US8807994B2 (en) 2009-05-20 2014-08-19 Paul Wurth S.A. Method for operating a regenerative heater
TWI489065B (zh) * 2009-05-20 2015-06-21 Wurth Paul Sa 用於操作回熱式加熱器的方法

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Publication number Publication date
BE1006702A6 (fr) 1994-11-22

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