EP0617785B1 - Verfahren und regenerator für die wiederaufheizung von gasen - Google Patents

Verfahren und regenerator für die wiederaufheizung von gasen Download PDF

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Publication number
EP0617785B1
EP0617785B1 EP93923585A EP93923585A EP0617785B1 EP 0617785 B1 EP0617785 B1 EP 0617785B1 EP 93923585 A EP93923585 A EP 93923585A EP 93923585 A EP93923585 A EP 93923585A EP 0617785 B1 EP0617785 B1 EP 0617785B1
Authority
EP
European Patent Office
Prior art keywords
cold
regenerator
hot
gas
phase
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.)
Expired - Lifetime
Application number
EP93923585A
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English (en)
French (fr)
Other versions
EP0617785A1 (de
Inventor
Hans-Georg Fassbinder
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.)
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Original Assignee
Air Liquide SA
LAir Liquide SA a Directoire et Conseil de Surveillance pour lEtude et lExploitation des Procedes Georges Claude
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Application filed by Air Liquide SA, LAir Liquide SA a Directoire et Conseil de Surveillance pour lEtude et lExploitation des Procedes Georges Claude filed Critical Air Liquide SA
Publication of EP0617785A1 publication Critical patent/EP0617785A1/de
Application granted granted Critical
Publication of EP0617785B1 publication Critical patent/EP0617785B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F28D17/005—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 using granular particles
    • 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
    • F28D17/02—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 using rigid bodies, e.g. of porous material

Definitions

  • the present invention relates to a method of heating gas in a regenerator with a mass of heat accumulation consisting of bulk material arranged in a ring between two cylindrical grids coaxial, a hot collection chamber, surrounded by the hot grid internal, for hot gases and a cold collection chamber, enclosed between the external cold grid on the one hand and the external wall of the enclosure of the regenerator on the other hand, for cold gases, as well as a regenerator of this type.
  • a process and a regenerator in accordance with the preambles of the claims 1 and 4, respectively, are known for example from document DE-C-4 108 744.
  • the hot gases respectively the cold gases are driven in the radial direction through the mass of accumulation of heat, unlike otherwise usual air heaters, and done during the reheating phase, from the hot collection chamber inside the regenerator towards the external cold collection chamber, and in the opposite direction during the cold blowing of the regenerator.
  • Gases at reheat can also be gas mixtures, which contain also parts of vapors, in particular water vapor.
  • the object of the invention is therefore to improve the process mentioned in the introduction as well as the regenerator described above, avoiding disadvantages caused by the chimney effect and in particular by increasing the power of the regenerator for a construction height significantly less of it.
  • this objective is achieved by the fact that the increase in the pressure drop during the heating phase is at least 5 times as great as the product ⁇ .gH, in which H is the height of the regenerator, ⁇ is the density of the gas at a temperature of 20 ° C and g is the acceleration of gravity, that the gas flow is worth at least 300 m 3 N / hm 2 of surface of the hot grid at pressure normal, and that the grain size of the bulk material is chosen less than 15 mm.
  • This distribution in S of the temperature includes first the advantage that the drop in temperature of the hot wind during blowing cold is very low, and besides that the variation in temperature average of the entire material bed is on the contrary very high with about 600 ° C.
  • the variation mean temperature is only about 100 ° C, hence it results that the S distribution of temperature stores about six times more thermal energy than the linear distribution of temperature. This result allows the mass to be reduced to around one sixth. heat buildup.
  • the cold phase that is to say the cold blowing, is carried out with an overpressure.
  • the flow of gas to be heated increases in the P / P 0 ratio, without the heat transfer degrading. If, for example, a blast furnace wind is produced at a pressure of 5 bar, the flow rate can reach 5000 m 3 N / hm 2 , respectively 2500 kW / m 2 . With a regenerator having a grid area of 20 m 2 , a hot wind flow of 100,000 m 3 N / h can be produced.
  • the heating phase is carried out at full power, and breaks are observed after the cold blowing phase.
  • This implementation of the process makes it possible to work with the power desired constriction, and the thermal equilibrium of the two phases is then established by the breaks after the cold blowing, and also to use for heating the regenerator a burner which has only a range of very limited adjustment, unlike the burners used until now in conventional wind heaters.
  • the other objective fixed to the invention is, in a regenerator intended for the implementation of the process, achieved by the fact that the outside diameter of the annular mass of heat accumulation is at most the twice its internal diameter, and that the grain size of the bulk material is chosen to be less than 15 mm.
  • the regenerator is heated with a premix burner.
  • a premix burner guarantees that the hot collecting chamber of the regenerator is entirely sufficient as a combustion chamber and that the combustion takes place not only without noise but also without pulsations. Furthermore, the size of the regenerator is not adversely affected by the use of such a premix burner.
  • FIG. 2 An exemplary embodiment of the burner is shown in FIG. 2 and will explained in detail below.
  • the regenerator 1 intended for the implementation of the method of the invention has an enclosure 2 having the shape of an upright cylinder, which can by example be supported by pillars 3.
  • the interior space of enclosure 2 is essentially divided by two grids 4 and 5 of cylindrical shape and arranged concentrically with distance from each other, in a cylindrical hot collection chamber 6 internal, an intermediate annular chamber 7 containing the accumulation mass heat consisting of bulk material, and a cold external annular collection 8 formed by the wall of the enclosure 2 with grid 5.
  • arrivals are expected 10 for heating gases, which are produced by a premix burner 11, which in turn is supplied by a gas - air mixing tube 12.
  • the hot internal collection chamber 6 ends in the upper region enclosure 2 of regenerator 1 by a hot wind outlet 13, the external collection chamber 8 is connected to a chimney 14 for evacuation burnt gases, from which the heating gases can escape after they have passed through the heat storage agent in the intermediate chamber 7.
  • the gas-air mixing tube 12 is connected to a fan 15, which produces both air for the heating phase and for the cold blowing. In the heating phase, air is led through the tube of gas - air mixture 12 and mixed with heating gas, which has been introduced by the gas injector 16 into the gas-air mixing tube 12.
  • valves 17, 18 and 19 are closed, the valve 20 and the outlet 13 are on the contrary open, so that the cold blowing phase can begin.
  • the open fittings are at again closed and the previously closed valves are open, so that the heating phase can start again.
  • the bulk material of the heat accumulating mass consists of a loading of granules with a grain size not exceeding 15 mm, and the outside diameter of the annular mass of heat accumulation is not more than double the inside diameter.
  • This minimum flow corresponds to a power of 300 m 3 N / hm 2 .
  • the S-profile of the temperature is more and more clearly raised.
  • a particularly advantageous operating point appeared for a flow capacity of 1000 m 3 N / hm 2 , a pressure drop from 1000 to 1600 Pascal.
  • An increase in the flow rate up to 2000 m 3 N / hm 2 is possible without reducing the heat transfer, taking into account a pressure drop from 3000 to 5000 Pascal.
  • This power limit is applicable to walking at normal pressure.
  • the operation under increased pressure has shown the surprising result, that the flow rate can be further increased, in fact in proportion to the absolute pressure, without the heat transfer data being degraded. If, for example, a blast furnace wind at 5 bar is produced, the flow can reach 5000 m 3 N / hm 2 , respectively 2500 kW / m 2 . It is thus possible to produce a flow of hot wind of 100,000 m 3 N / h with a regenerator having a grid surface of 20 m 2 .
  • regenerator is generally heated leads to normal pressure, three generators must be heated simultaneously, so a total of four regenerators are required to ensure continuous operation for the production of gas hot.
  • regenerators only have a diameter of 4 m for a height of 5 m, while air heaters of the same power used up to now have a diameter of 8 m and a height of 30 m.
  • a partial load step is actually only achievable by performing the heating phase at full power, but it must however possibly insert breaks after the cold blowing phase.
  • We therefore use a burner says premix, in which the heating gas and combustion air are intimately mixed with each other when cold, before ignition, and are only ignited after mixing. For a safe walk of such premix burner, it is necessary not to go below a minimum gas speed, to surely avoid a return of flame of the mixture. As a result, such a premix burner does not has only a very limited adjustment range.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Dispersion Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Drying Of Solid Materials (AREA)
  • Air Supply (AREA)
  • Furnace Details (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
  • Air Bags (AREA)
  • Gas Burners (AREA)

Claims (5)

  1. Verfahren zum Wiederaufheizen eines Gases in einem Regenerator mit einer Wärmespeichermasse bestehend aus Schüttgut, das ringförmig zwischen zwei ko-axialen zylindrischen Gittern angeordnet ist, einer Warmspeicherkammer für heiße Gase, die vom internen warmen Gitter umgeben ist, und einer Kaltspeicherkammer für kalte Gase, die zwischen dem externen kalten Gitter einerseits und der Außenwand der Umhüllung des Regenerators andererseits eingeschlossen ist, bei dem:
    a) man während der sogenannten Heizphase ein Heizgas von der Warmspeicherkammer über die Wärmespeichermasse zur Kaltspeicherkammer zirkulieren lässt, um die Wärmespeichermasse aufzuheizen,
    b) man während der sogenannten Kaltblasphase das wiederaufzuheizende Gas von der Kaltspeicherkammer über die Wärmespeichermasse zur Warmspeicherkammer zirkulieren lässt, um das Gas wiederaufzuheizen,
    dadurch gekennzeichnet, dass ΔPwarm - ΔPkalt ≥ 5 ρ.g.H, wobei
    ΔPwarm den Lastverlust des Regenerators am Ende der Heizphase darstellt;
    ΔPkalt den Lastverlust des Regenerators zu Beginn der Heizphase darstellt;
    H die Höhe des Regenerators ist;
    ρ die Dichte des wiederaufzuheizenden Gases bei einer Temperatur von 20°C ist;
    g die Schwerebeschleunigung ist,
    dass der Gasdurchsatz während der Heizphase größer oder gleich 300 Nm3 pro Stunde und m2 der Oberfläche des warmen Gitters bei Normaldruck ist und dass die Größe der Körner des Schüttguts kleiner als 15 mm gewählt wird.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Kaltblasphase mit Überdruck durchgeführt wird.
  3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Verfahren nach einer sogenannten Betriebsart mit Teillast durchgeführt wird, bei der die Heizphase bei voller Leistung erfolgt und bei der Pausen nach der Kaltblasphase eingehalten werden.
  4. Regenerator, der für die Durchführung des Wiederaufheizverfahrens eines Gases nach einem der Ansprüche 1 bis 3 geeignet ist, mit einer Wärmespeichermasse aus Schüttgut, die ringförmig zwischen zwei koaxialen zylindrischen Gittern (4, 5) mit einem internen warmen Gitter (4) und einem externen kalten Gitter (5) angeordnet ist, einer Warmspeicherkammer (6) für heiße Gase, die vom internen warmen Gitter (4) umgeben ist, und einer Kaltspeicherkammer (8) für kalte Gase, die zwischen dem externen kalten Gitter (5) einerseits und der Wand der Umhüllung (2) des Regenerators andererseits eingeschlossen ist, dadurch gekennzeichnet, dass der Außendurchmesser der ringförmigen Wärmespeichermasse maximal doppelt so groß ist wie ihr Innendurchmesser und dass die Größe der Körner des Schüttguts kleiner als 15 mm gewählt wird.
  5. Regenerator nach Anspruch 4, dadurch gekennzeichnet, dass er einen Brenner (11) mit Vorgemisch zur Herstellung des Heizgases umfasst.
EP93923585A 1992-10-29 1993-10-19 Verfahren und regenerator für die wiederaufheizung von gasen Expired - Lifetime EP0617785B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4236619A DE4236619C2 (de) 1992-10-29 1992-10-29 Verfahren und Regenerator zum Aufheizen von Gasen
DE4236619 1992-10-29
PCT/FR1993/001025 WO1994010519A1 (fr) 1992-10-29 1993-10-19 Procede et regenerateur pour le rechauffage de gaz

Publications (2)

Publication Number Publication Date
EP0617785A1 EP0617785A1 (de) 1994-10-05
EP0617785B1 true EP0617785B1 (de) 2003-08-13

Family

ID=6471695

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93923585A Expired - Lifetime EP0617785B1 (de) 1992-10-29 1993-10-19 Verfahren und regenerator für die wiederaufheizung von gasen

Country Status (10)

Country Link
US (2) US5547016A (de)
EP (1) EP0617785B1 (de)
JP (1) JPH07502804A (de)
KR (1) KR100317968B1 (de)
CN (1) CN1072793C (de)
AT (1) ATE247271T1 (de)
CA (1) CA2126993C (de)
DE (1) DE4236619C2 (de)
ES (1) ES2202314T3 (de)
WO (1) WO1994010519A1 (de)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4236619C2 (de) * 1992-10-29 1996-11-28 Air Liquide Verfahren und Regenerator zum Aufheizen von Gasen
DE4317947C1 (de) * 1993-05-28 1994-06-23 Atz Evus Verfahren und Vorrichtungen zur Umwandlung thermischer Energie eines Mediums in mechanische Arbeit
DE19521673C2 (de) * 1995-06-14 1998-07-02 Atz Evus Applikations & Tech Verfahren zur regenerativen Abluftreinigung
US6631754B1 (en) 2000-03-14 2003-10-14 L'air Liquide Societe Anonyme A Directoire Et Conseil De Surveillance Pour L'etude Et L'exploitation Des Procedes Georges Claude Regenerative heat exchanger and method for heating a gas therewith
US6389776B1 (en) 2000-03-14 2002-05-21 L'air Liquide Societe Anonyme A Directoire Et Conseil De Surveillance Pour L'etude Et L'exploitation Des Procedes Georges Claude Gas permeable refractory brick for use in regenerative heat exchanger and hot grid formed therefrom
DE10039246C2 (de) 2000-08-11 2002-06-13 Atz Evus Verfahren zur Umwandlung von thermischer Energie in mechanische Arbeit
DE102004026646B4 (de) * 2004-06-01 2007-12-13 Applikations- Und Technikzentrum Für Energieverfahrens-, Umwelt- Und Strömungstechnik (Atz-Evus) Verfahren zur thermischen Entsorgung schadstoffhaltiger Substanzen
DE102007050566A1 (de) 2007-10-23 2009-05-07 Stevanović, Dragan, Dr. Verfahren und Vorrichtung zur Vergasung von kohlenstoffhaltigen Rohstoffen
DE102008014297A1 (de) 2007-11-16 2009-05-20 Krones Ag Verfahren und Vorrichtung zur Umwandlung kohlenstoffhaltiger Rohstoffe
AT506477B1 (de) 2008-02-21 2010-07-15 Schweighofer Franz Wärmespeichereinrichtung
NZ587568A (en) * 2008-02-28 2012-11-30 Krones Ag Method and device for converting carbonaceous raw materials
DE102009011358A1 (de) 2009-03-05 2010-09-16 Krones Ag Verfahren und Vorrichtung zur Verwertung von Biomasse in einem Biomassen-Vergasungsprozess
DE102009038323A1 (de) 2009-08-21 2011-02-24 Krones Ag Verfahren und Vorrichtung zur Verwertung von Biomasse
DE102009038322A1 (de) 2009-08-21 2011-02-24 Krones Ag Verfahren und Vorrichtung zur Umwandlung thermischer Energie aus Biomasse in mechanische Arbeit
US20110127004A1 (en) * 2009-11-30 2011-06-02 Freund Sebastian W Regenerative thermal energy storage apparatus for an adiabatic compressed air energy storage system
DE102013017010A1 (de) 2013-10-14 2015-04-16 Karl Brotzmann Consulting Gmbh Stromspeicherung über thermische Speicher und Luftturbine
CA2982255A1 (en) 2015-04-13 2016-10-20 Karl Brotzmann Consulting Gmbh Energy storage via thermal reservoirs and air turbines
DE102021108719A1 (de) 2021-04-08 2022-10-13 HiTES Holding GmbH Verfahren und Vorrichtung zur Umsetzung chemischer Energie eines Brennstoffes in Wärme und elektrische Energie
DE102021129812A1 (de) 2021-11-16 2023-05-17 HiTES Holding GmbH Verfahren und Vorrichtung zum Erzeugen von Wasserstoff
DE102021129804A1 (de) 2021-11-16 2023-05-17 HiTES Holding GmbH Verfahren und Vorrichtung zum Erzeugen von Wasserstoff
DE102021129810A1 (de) 2021-11-16 2023-05-17 HiTES Holding GmbH Verfahren und Vorrichtung zum Erzeugen von Wasserstoff
DE102022118858A1 (de) 2022-07-27 2024-02-01 HiTES Holding GmbH Thermisches Cracking von Methan oder Erdgas

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US1940371A (en) * 1930-05-06 1933-12-19 Research Corp Apparatus for heating gases
GB387070A (en) * 1930-11-22 1933-02-02 Dougree Marihaye Sa Honeycomb structure for heat recuperating apparatus of the cowper type
US2272108A (en) * 1940-01-19 1942-02-03 Research Corp Regenerative stove
JPS5776078A (en) * 1980-10-29 1982-05-12 Agency Of Ind Science & Technol Heat accumulator utilizing latent heat
DE8718031U1 (de) * 1987-03-27 1993-01-14 Zeuna-Staerker Gmbh & Co Kg, 8900 Augsburg, De
DE3831831C1 (de) * 1988-09-20 1989-11-02 Skw Trostberg Ag, 8223 Trostberg, De
DE3841708C1 (de) * 1988-12-10 1989-12-28 Kloeckner Cra Patent Gmbh, 4100 Duisburg, De
DE4108744C1 (en) * 1991-03-18 1992-08-27 Atz Energie Umwelt Stroemungstechnik Gas heating jacketed regenerator with heat storage medium - has central chamber surrounded by layer of pebbles or granular material
DE4236619C2 (de) * 1992-10-29 1996-11-28 Air Liquide Verfahren und Regenerator zum Aufheizen von Gasen

Also Published As

Publication number Publication date
WO1994010519A1 (fr) 1994-05-11
EP0617785A1 (de) 1994-10-05
CN1086895A (zh) 1994-05-18
DE4236619C2 (de) 1996-11-28
CA2126993C (fr) 2004-12-21
JPH07502804A (ja) 1995-03-23
US5547016A (en) 1996-08-20
CN1072793C (zh) 2001-10-10
ATE247271T1 (de) 2003-08-15
KR100317968B1 (ko) 2002-04-22
US5690164A (en) 1997-11-25
DE4236619A1 (de) 1994-05-05
ES2202314T3 (es) 2004-04-01
CA2126993A1 (fr) 1994-05-11
KR940703990A (ko) 1994-12-12

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