EP0275859A1 - Druckgasvorwärmer - Google Patents

Druckgasvorwärmer Download PDF

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Publication number
EP0275859A1
EP0275859A1 EP87870201A EP87870201A EP0275859A1 EP 0275859 A1 EP0275859 A1 EP 0275859A1 EP 87870201 A EP87870201 A EP 87870201A EP 87870201 A EP87870201 A EP 87870201A EP 0275859 A1 EP0275859 A1 EP 0275859A1
Authority
EP
European Patent Office
Prior art keywords
gas
hand
gases
heated
flow
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
EP87870201A
Other languages
English (en)
French (fr)
Other versions
EP0275859B1 (de
Inventor
Jacques Ribesse
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
Priority to AT87870201T priority Critical patent/ATE64156T1/de
Publication of EP0275859A1 publication Critical patent/EP0275859A1/de
Application granted granted Critical
Publication of EP0275859B1 publication Critical patent/EP0275859B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/0001—Heating elements or systems
    • F27D99/0033—Heating elements or systems using burners
    • 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
    • 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 various gaseous fluids such as air, steam, oxygen, reducing gases, blast furnace gas, etc. up to very high temperatures, for example 1400-1500 ° C, under pressure up to 40 bar and in continuous supply.
  • gaseous fluids such as air, steam, oxygen, reducing gases, blast furnace gas, etc.
  • This process is based on the principle of the regenerative exchange of gases by alternating and periodic passage of gases from the heating phase and gases to be heated (combustion products from associated burners) over a thermal mass, with a short periodicity .
  • the device does not have valves operating at high temperature and provides a continuous flow of hot gas.
  • the present invention constituted by a gas heater at very high temperature and under pressure, overcomes the drawbacks mentioned above: - It allows the heating of various gases, air, steam, reducing gases, hydrogen, blast furnace gas. - It has a single encient with two internal zones operating at the same pressure, the system is continuous. - The energy consumption for the compression of the combustion air is negligible and independent of the pressure thanks to the recovery by the expansion turbine of the energy contained in the burnt gases. - It allows gas heating to pressures up to 40 bar (synthesis gas). - It has a very short cycle which allows a considerable decrease in the masses involved and investment.
  • the apparatus comprises a vertical reactor (1) whose walls are internally lined with refractory and insulating materials (2) and containing thermal masses (3), for example spheres in alumina or other suitable forms and materials which transfer heat.
  • the reactor is equipped with burners (10) (10 ⁇ ) placed on either side of the middle zone.
  • a hot gas collection pipe (15) connected to the insulated pipe (6) continuously supplying hot gas under pressure.
  • Sealed valves (5) (5 ⁇ ) (9) (9 ⁇ ) (12) (12 ⁇ ) (13) (13 ⁇ ) allow gas flows at low temperature to be directed or extracted from either end reactor cold; they are controlled by a periodic sequence device.
  • regulation and measurement devices control the various gas flows - gas to be heated, air and combustible gas, combustion gas - according to a procedure forming part of the invention.
  • the object heater of the invention consisting of a single unit, is characterized in that it is provided with means for putting under identical pressure, on the one hand the gas to be heated and on the other hand the combustion area, means for controlling on the one hand the flow of the gas to be heated and the flow of combustion air, and on the other hand the flow of the gases burned so to avoid pollution of the gas to be heated by the burnt gases without using shutter means; in an advantageous mode, the heater is also provided with means for purging the enclosure of residual combustion gases at the time of the reversals, with means for overpressuring the combustion air; in the event of operation under pressure greater than 2 bars, the heater can advantageously be provided with means for expansion of the burnt gases making it possible to recover the energy.
  • the system therefore operates under pressure as follows:
  • the gas to be heated under pressure (4), at controlled flow rate, is directed towards one of the ends of the enclosure (1), for example by opening the valve (5 ⁇ ), it passes through the thermal mass (3) where it gradually heats up by taking the heat from this mass.
  • the hot gas is collected in the peripheral manifold (15) and is transferred to the hot gas pipe (6) and to use.
  • the combustion gases leave the enclosure (1) by means of the open valve (13) and are directed towards the chimney via a flow control means and an expansion turbine (14).
  • the upper and lower parts of the enclosure (1) are in direct communication with the central part, without separation of the heating and combustion phases by hot valves. There is however no mixture of heated gas coming from one side of the enclosure with combustion gas coming from the other side thanks to the fact that the flow rate of the burnt gases extracted from the enclosure is controlled. towards the chimney so that the quantity corresponds to that which results from the combustion of gas and air from the burners.
  • the circuits are reversed: the gas to be heated is directed to the other end of the enclosure (1) by opening the valve (5) and closing the valve (5 ⁇ ); similarly, combustion is started with the burners (10 ⁇ ) located in the upper middle part of the enclosure by opening (9 ⁇ ) and (12 ⁇ ) and closing (9) and (12). In addition, the combustion gases are removed from the enclosure on the upper side by opening (13 ⁇ ) and closing (13). It is a cyclic system with continuous production of hot gases.
  • the internal volume on one side of the enclosure is filled with combustion gases which must be purged to avoid sending this gas, on inversion, to the manifold. hot gas.
  • injecting is carried out for a very short time, for example 0.5 to 5 seconds depending on the pressure level, and by a conduit and a valve connected to the burners (10) (10 ⁇ ) a certain amount of cold gas to be heated.
  • This purge gas thus eliminates, before inversion of the system, the residual burnt gases. In the event of air heating, this procedure is simplified by purging with combustion air, closed burner gas (12 ⁇ ) or (12).
  • the volume of gas to be heated contained in the upper (or lower) part of the enclosure can be recovered at the time of the inversion by sending it, for a few seconds, to a reservoir (16) at localized reduced pressure.
  • a reservoir (16) at localized reduced pressure in the chimney circuit before the valve opens (13 ⁇ ) or (13) after the burners start, this in the case where the gas to be heated has a high economic value, for example hydrogen or reducing gas.
  • the central part of the enclosure is also provided with additional thermal masses placed between the burners, playing a role of temperature stabilization.
  • the device which is part of the family of regenerated systems ration, operates at constant pressure in the two zones of the enclosure, which improves the resistance to high thermal and dynamic stresses of these systems.
  • the pressurized gas reheating device which is the subject of the present invention has a short cycle operation (1 to 5 minutes), which greatly limits the volume of thermal masses and the cost of the system.
  • the purge devices are such that they prevent mixing of the gases to be heated and the combustion gases at the time of reversal.
  • the heater can heat all types of gas, including combustible or reactive gases (hydrogen, reducing gases, blast furnace gas, ...) at high temperatures inaccessible to conventional processes.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Organic Chemistry (AREA)
  • Metallurgy (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Thermal Sciences (AREA)
  • Air Supply (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Feeding And Controlling Fuel (AREA)
  • Lasers (AREA)
EP87870201A 1986-12-23 1987-12-22 Druckgasvorwärmer Expired - Lifetime EP0275859B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87870201T ATE64156T1 (de) 1986-12-23 1987-12-22 Druckgasvorwaermer.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE6/48285A BE906041A (fr) 1986-12-23 1986-12-23 Rechauffeur de gaz sous pression.
BE6048285 1986-12-23

Publications (2)

Publication Number Publication Date
EP0275859A1 true EP0275859A1 (de) 1988-07-27
EP0275859B1 EP0275859B1 (de) 1991-06-05

Family

ID=3875007

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87870201A Expired - Lifetime EP0275859B1 (de) 1986-12-23 1987-12-22 Druckgasvorwärmer

Country Status (5)

Country Link
EP (1) EP0275859B1 (de)
AT (1) ATE64156T1 (de)
BE (1) BE906041A (de)
ES (1) ES2023677B3 (de)
GR (1) GR3002653T3 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0611270A1 (de) * 1993-02-10 1994-08-17 DISTRIGAZ Société anonyme dite: Verfahren zum Vorwärmen eines gasförmigen Mediums
EP0750170A1 (de) * 1994-12-02 1996-12-27 Kawasaki Steel Corporation Nichtoxidierendes heizverfahren und vorrichtung
EP0770833A1 (de) * 1994-08-10 1997-05-02 Nippon Furnace Kogyo Kabushiki Kaisha Hochtemperatur gasgenerator

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2863644A (en) * 1955-12-05 1958-12-09 Fallon John Thomas Regenerative heat exchange apparatus
DE1180382B (de) * 1960-01-25 1964-10-29 Electrodes Et Refractaires Ias Verfahren zum Speisen des Brenners eines Winderhitzers mit warmem Wind
DE1812366A1 (de) * 1968-12-03 1970-06-18 Rheinlaender Dr Ing Paul Verfahren und Vorrichtung zum Verdichten und Erhitzen von Nutzgasen
GB1281782A (en) * 1970-02-25 1972-07-12 Kureha Chemical Ind Co Ltd Stationary regenerative heating apparatus
GB1288167A (de) * 1970-02-25 1972-09-06
GB1322656A (en) * 1970-09-09 1973-07-11 Centre Rech Metallurgique Method and device for the regenerative heating of gases

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2863644A (en) * 1955-12-05 1958-12-09 Fallon John Thomas Regenerative heat exchange apparatus
DE1180382B (de) * 1960-01-25 1964-10-29 Electrodes Et Refractaires Ias Verfahren zum Speisen des Brenners eines Winderhitzers mit warmem Wind
DE1812366A1 (de) * 1968-12-03 1970-06-18 Rheinlaender Dr Ing Paul Verfahren und Vorrichtung zum Verdichten und Erhitzen von Nutzgasen
GB1281782A (en) * 1970-02-25 1972-07-12 Kureha Chemical Ind Co Ltd Stationary regenerative heating apparatus
GB1288167A (de) * 1970-02-25 1972-09-06
GB1322656A (en) * 1970-09-09 1973-07-11 Centre Rech Metallurgique Method and device for the regenerative heating of gases

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0611270A1 (de) * 1993-02-10 1994-08-17 DISTRIGAZ Société anonyme dite: Verfahren zum Vorwärmen eines gasförmigen Mediums
EP0770833A1 (de) * 1994-08-10 1997-05-02 Nippon Furnace Kogyo Kabushiki Kaisha Hochtemperatur gasgenerator
EP0770833A4 (de) * 1994-08-10 1998-12-16 Nippon Furnace Kogyo Kk Hochtemperatur gasgenerator
EP0750170A1 (de) * 1994-12-02 1996-12-27 Kawasaki Steel Corporation Nichtoxidierendes heizverfahren und vorrichtung
EP0750170A4 (de) * 1994-12-02 2000-12-20 Kawasaki Steel Co Nichtoxidierendes heizverfahren und vorrichtung

Also Published As

Publication number Publication date
ES2023677B3 (es) 1992-02-01
BE906041A (fr) 1987-06-23
GR3002653T3 (en) 1993-01-25
EP0275859B1 (de) 1991-06-05
ATE64156T1 (de) 1991-06-15

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