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WO1982002762A1 - Procede et four pour la combustion de matieres telles que calcaire, dolomite, magnesite ou autres, et utilisation de ce four - Google Patents

Procede et four pour la combustion de matieres telles que calcaire, dolomite, magnesite ou autres, et utilisation de ce four Download PDF

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Publication number
WO1982002762A1
WO1982002762A1 PCT/DE1982/000021 DE8200021W WO8202762A1 WO 1982002762 A1 WO1982002762 A1 WO 1982002762A1 DE 8200021 W DE8200021 W DE 8200021W WO 8202762 A1 WO8202762 A1 WO 8202762A1
Authority
WO
WIPO (PCT)
Prior art keywords
zone
furnace
combustion
gas
cooling
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
PCT/DE1982/000021
Other languages
German (de)
English (en)
Inventor
& Erden Gmbh Waermestelle Steine
Erich Bertsch
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.)
Individual
Original Assignee
Individual
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
Priority claimed from CH733/81A external-priority patent/CH651650A5/de
Application filed by Individual filed Critical Individual
Publication of WO1982002762A1 publication Critical patent/WO1982002762A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/005—Shaft or like vertical or substantially vertical furnaces wherein no smelting of the charge occurs, e.g. calcining or sintering furnaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
    • F02G5/00—Profiting from waste heat of combustion engines, not otherwise provided for
    • F02G5/02—Profiting from waste heat of exhaust gases
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the invention relates to a method for firing lumpy firing material, such as limestone, dolomite, magnesite or the like.
  • a shaft insert which extends from the lower part of the cooling zone to the upper part of the combustion zone, is arranged coaxially to the shaft wall and at a distance from it.
  • the shaft insert has openings through which the part of the at least partially used fuel gases, which is taken down by the burned material, and cooling air rising from the cooling zone enter the shaft insert. The gas mixture is sucked out of the shaft insert by means of injectors and the
  • the injector has been operated with propellant air, which was preheated in a recuperator, to which part of the furnace exhaust gases rising in the preheating zone was supplied as heat medium.
  • the heating of the propellant air was inevitable, especially when burning high-percentage limestone, which requires a maximum of heat when burning and in which a maximum of carbon dioxide escapes.
  • the heating of the propellant air in the recuperator by means of the furnace exhaust gases has the disadvantage that the soot of the furnace exhaust gases and the dust carried by the furnace exhaust gases, depending on the nature of the combustion material, are deposited in the recuperator, so that the propellant air is gradually heated less and the recuperator finally clogged after some time. Because the cleaning of the recuperator is tedious and time-consuming, the furnace operation had to be interrupted for a long time, the furnace cooling, so that the temperature in the combustion and preheating zone when the furnace operation started again did not ensure proper firing of the good was sufficient.
  • the invention is further based on the surprising finding that the driving air of the injector considerably reduces the thermal efficiency of the furnace.
  • the thermal The efficiency of the furnace depends primarily on how large the amount of heat that is carried away by the exhaust gases from the furnace. Since the exhaust gases leave the combustion zone at high temperatures, they carry considerable amounts of heat with them. A part of this amount of heat is used for heating the material located in the preheating zone. For the efficiency it is now important that as large a part as possible of the amount of heat carried along by the furnace exhaust gases is absorbed by the material located in the preheating zone. This proportion is greater the slower the exhaust gas flows through the preheating zone, ie the smaller the quantities of gas which transport the heat from the combustion zone to the preheating zone per unit of time.
  • the invention is therefore based on the object of reducing the proportion of air in the gases in the furnace and of permitting uninterrupted operation of the furnace. - 4 -
  • a recuperator is provided in a manner known per se, to which at least part of the furnace exhaust gases rising through the preheating zone is supplied as the heating medium.
  • the recuperator is used according to the invention for heating fresh air which, for. B. dries the material in a drying system used together with the shaft furnace, in particular a mill drying system.
  • the gas engine is used to drive a generator for generating electricity, which, for. B. can also be used for the operation of the mill drying system. Because the injector or injectors are operated with the exhaust gas of the gas engine, its waste heat is used for heating the combustion and preheating zone.
  • the single figure shows a schematic representation of a shaft furnace.
  • the cylindrical shaft furnace 1 shown has a preheating zone V, a combustion zone B and a cooling zone K.
  • the lumpy material to be burned e.g. B. lime
  • the preheating zone V is fed through a funnel-shaped feed 2.
  • a tube 3 is arranged coaxially to the furnace wall, into which a part of the furnace exhaust gases rising in this zone flows at the lower, open end and the upper part of which is closed at the end is connected to a recuperator 5 by a line 4.
  • the furnace exhaust gases emerging through the outlet nozzle 6 of the recuperator 5 are passed, together with the remaining furnace exhaust gases flowing through an outlet nozzle 7 at the upper end of the preheating zone V, to the chimney via dedusting filters in a manner not shown.
  • the waste heat from the exhaust gases supplied to the recuperator 5 is used to heat fresh air, which is fed to a mill-drying system (not shown).
  • An injector opens into each of the feeds 8, only one of these injectors being shown in the drawing and being designated by 10.
  • the propellant inlets 12 of the injectors 10 are connected to a ring line 13 which is connected to the exhaust line 14 of a gas engine 15.
  • the z. B. gas engine 15 powered by natural gas drives a generator 16 on, which generates electrical current, which, for. B.
  • the suction ports 17 of the injectors 10 are connected to the upper part of a cylindrical shaft insert 18 which is arranged coaxially to the furnace wall and is distanced therefrom.
  • the shaft insert 18 extends from the upper part of the firing zone B to the lower part of the cooling zone K and limits the two zones to the annular space delimited by him and the shaft wall. It is open at the bottom and in the middle area, below the feeds 8, is provided with openings 19 through which the part of the at least partially consumed fuel gases, designated 20, which together with the fired material in the combustion zone B down towards the Cooling zone K flows, and cooling air 22, which rises therein and blows through a cooling air supply line 21 into the lower part of cooling zone K, enters the shaft insert 18.
  • the gas mixture is sucked out of the shaft insert 18 by means of the injectors 10 and fed into the combustion zone B with the gas engine exhaust gases through the feeds 8 which supply the fuel gas 9.
  • a funnel-shaped discharge device 23 for the fired material is arranged at the lower end of the cooling zone K.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Furnace Details (AREA)

Abstract

La matiere introduite par le haut du four (1) passe successivement par des zones de prechauffage (V), de combustion (B) et de refroidissement (K). La zone (B) est alimentee en gaz de combustion (9) et la zone (K) en air de refroidissement (21). Une partie (20) des gaz de combustion au moins partiellement brules s'ecoulant de la zone (B) avec les matieres calcinees parvient avec l'air montant de refroidissement (22) dans un cylindre (18). Des buses (10) aspirent le melange gazeux hors du cylindre (18) et le refoulent dans la zone (B); elles sont actionnees par les gaz d'echappement d'un moteur (15).
PCT/DE1982/000021 1981-02-04 1982-02-03 Procede et four pour la combustion de matieres telles que calcaire, dolomite, magnesite ou autres, et utilisation de ce four Ceased WO1982002762A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CH733/81 1981-02-04
CH733/81A CH651650A5 (de) 1981-02-04 1981-02-04 Verfahren und schachtofen zum brennen von stueckigem brenngut.
DE3119198810514 1981-05-14
DE3119198A DE3119198C2 (de) 1981-02-04 1981-05-14 Verfahren und Schachtofen zum Brennen von stückigem Brenngut, wie Kalkstein, Dolomit, Magnesit oder dgl. sowie Verwendung des Schachtofens

Publications (1)

Publication Number Publication Date
WO1982002762A1 true WO1982002762A1 (fr) 1982-08-19

Family

ID=25685525

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1982/000021 Ceased WO1982002762A1 (fr) 1981-02-04 1982-02-03 Procede et four pour la combustion de matieres telles que calcaire, dolomite, magnesite ou autres, et utilisation de ce four

Country Status (2)

Country Link
JP (1) JPS58500082A (fr)
WO (1) WO1982002762A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0281535A1 (fr) * 1987-02-25 1988-09-07 PPS Project Promotion Services AB Centrale de cogénération de puissance et de chaleur
WO2008022941A1 (fr) * 2006-08-22 2008-02-28 Rheinkalk Gmbh Four droit annulaire

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE716158C (de) * 1939-01-20 1942-01-14 Argus Motoren Ges M B H Vorrichtung zur Verwertung der Energie der Auspuffgase einer Brennkraftmaschine
DE1152653B (de) * 1958-11-25 1963-08-08 Rheinische Kalksteinwerke Schachtoefen zum Brennen von Kalkstein oder sonstigen Karbonaten mit Abgasumwaelzung
DE1214590B (de) * 1960-09-22 1966-04-14 Beckenbach Karl Gas- oder oelbeheizter Schachtofen zum Brennen von Kalkstein, Dolomit od. dgl.
DE1281111B (de) * 1961-06-21 1968-10-24 Beckenbach Karl Verfahren zum Brennen von Kalkstein od. dgl. in einem Schachtofen und nach diesem Verfahren arbeitender Schachtofen
DE1558072A1 (de) * 1967-03-04 1970-03-19 Rheinische Kalksteinwerke Verfahren zum Betrieb eines Schachtofens
FR2316569A1 (fr) * 1975-06-18 1977-01-28 Foster Wheeler Energy Corp Dispositif de recuperation de la chaleur a partir des gaz d'echappement d'un generateur de chaleur

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE716158C (de) * 1939-01-20 1942-01-14 Argus Motoren Ges M B H Vorrichtung zur Verwertung der Energie der Auspuffgase einer Brennkraftmaschine
DE1152653B (de) * 1958-11-25 1963-08-08 Rheinische Kalksteinwerke Schachtoefen zum Brennen von Kalkstein oder sonstigen Karbonaten mit Abgasumwaelzung
DE1214590B (de) * 1960-09-22 1966-04-14 Beckenbach Karl Gas- oder oelbeheizter Schachtofen zum Brennen von Kalkstein, Dolomit od. dgl.
DE1281111B (de) * 1961-06-21 1968-10-24 Beckenbach Karl Verfahren zum Brennen von Kalkstein od. dgl. in einem Schachtofen und nach diesem Verfahren arbeitender Schachtofen
DE1558072A1 (de) * 1967-03-04 1970-03-19 Rheinische Kalksteinwerke Verfahren zum Betrieb eines Schachtofens
FR2316569A1 (fr) * 1975-06-18 1977-01-28 Foster Wheeler Energy Corp Dispositif de recuperation de la chaleur a partir des gaz d'echappement d'un generateur de chaleur

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0281535A1 (fr) * 1987-02-25 1988-09-07 PPS Project Promotion Services AB Centrale de cogénération de puissance et de chaleur
WO2008022941A1 (fr) * 2006-08-22 2008-02-28 Rheinkalk Gmbh Four droit annulaire

Also Published As

Publication number Publication date
JPS58500082A (ja) 1983-01-13

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