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US3297310A - Hot blast stoves for combusting quality fuels - Google Patents

Hot blast stoves for combusting quality fuels Download PDF

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Publication number
US3297310A
US3297310A US426279A US42627965A US3297310A US 3297310 A US3297310 A US 3297310A US 426279 A US426279 A US 426279A US 42627965 A US42627965 A US 42627965A US 3297310 A US3297310 A US 3297310A
Authority
US
United States
Prior art keywords
roof
shaft
hot blast
combusting
heat exchanger
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
US426279A
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English (en)
Inventor
Pentek Istvan
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.)
Licencia Talalmanyokat Ertekesito Vallalat
Original Assignee
Licencia Talalmanyokat Ertekesito Vallalat
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 Licencia Talalmanyokat Ertekesito Vallalat filed Critical Licencia Talalmanyokat Ertekesito Vallalat
Application granted granted Critical
Publication of US3297310A publication Critical patent/US3297310A/en
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
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B9/00—Stoves for heating the blast in blast furnaces
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B9/00—Stoves for heating the blast in blast furnaces
    • C21B9/02—Brick hot-blast stoves
    • C21B9/06—Linings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
    • F23M20/00—Details of combustion chambers, not otherwise provided for, e.g. means for storing heat from flames
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
    • F23M5/00—Casings; Linings; Walls
    • F23M5/06—Crowns or roofs for combustion chambers

Definitions

  • double dome structures for hot blast stoves.
  • the significance of such structures consists in enclosing an intermediate chamber by an inner dome and an outer dome, and introducing secondary air through said intermediate chamher into the various shafts of the hot blast stove below.
  • the inner dome which due to heat radiating from the shafts therebelow is constantly exposed to high temperatures becomes efiiciently cooled by fresh secondary air which, in turn, becomes favourably warmed up or preheated.
  • the cooling of the inner dome and the warming up of the secondary air permits, on the one hand, combusting of quality fuels and, on the other hand, generating of elevated temperatures such as 1200 to 1300 degrees centigrade which means that the overall efficiency is increased by 3 to with respect to conventional hot blast stoves.
  • the main object of the present invention is to employ the idea of double dome structures in case of hot blast stoves of other than circular cross-sectional areas as well. According to the main feature of the present invention this is rendered possible by employing double roof structures the inner and outer roofs of which form self-contained stabile systems permitting to adapt the base surface of the roof to the cross-sectional area of the stove.
  • FIG. 1 is a vertical sectional view of a first exemplified embodiment.
  • FIGS. 2 and 3 show vertical sectional views of further exemplified embodiments, respectively.
  • FIG. 4 illustrates an exemplified embodiment of an entire hot blast stove according to the invention.
  • FIGS. 5 to 7 are sectional views taken along the lines AA, BB and CC, respectively, of FIG. 4.
  • FIGS. 8 and 9 show longitudinal sectional views each of a further exemplified embodiment of the double roof construction characteristic of the novel hot blast stove.
  • reference character 1 indicates a refractory walling of a Cowper stove having a furnace shaft 3 and a heat exchanger shaft 4 under a roof chamber 21.
  • An inner roof 8 and an outer roof 12 forming selfcontained stabile systems are united to a double roof structure of other than semi-spherical shape.
  • the pair of roofs 8 and 12 enclose an intermediate air chamber 11 which communicates through passages 13 in inner roof 8 with said roof chamber 21. Secondary air is introduced through a pipe conduit 14.
  • FIGS. 2 and 3 are of the suspended arch type.
  • the inner or lower roof 8 is held by threaded connections or hangers 42 which are, in turn, anchored in the outer or upper roof 12.
  • Both exemplified embodiments difier from one another only in that, in case of FIG. 2, the furnace shaft 3 is not directly adjacent to the heat ex- 4 Claims.
  • the secondary air flows through a plurality of pipe conduits 14 into said intermediate chamber 11 whereby it becomes evenly distributed and is supplied into said roof chamber 21 through passages 13 without said even distribution being impaired.
  • a pipe conduit 31 serving for abducting of hot air and, originally, connected with furnace shaft 3 is connected with a brim 1a of the refractor, walling 1 of the Cowper stove by which the double roof structure 8, 12 is supported.
  • Such arrangement has the advantage that the walls of furnace chamber 3 previously directly exposed to the heating action of hot combustion gases withdrawing at the bottom of furnace shaft 3 from a burner device 43 during hot blast periods are not cooled by air withdrawing through pipe conduit 31. Thereby extreme thermal expansions detrimental to the lifetime of furnace shaft walls are considerably mitigated.
  • FIGS. 8 and 9 Similar embodiments are illustrated also in FIGS. 8 and 9, respectively. Both exemplified embodiments differ from one another only as regards the shape of double roof structure 8, 12, that according to FIG. 8 having the shape of a spherical calotte while the longitudinal sectional view of roof structure shown in FIG. 9 is a conic section.
  • the invention has been described in connection with double roof structures wherein both roofs were of the same type.
  • one of the roofs combined to a double roof structure according to the invention is a plane floor while the other roof is of the vaulted type.
  • the upper or outer roof may have a cavity which is connected externally with a pipe conduit and internally with one or a plurality of passages which open into said intermediate chamber. In such manner, even distribution and introduction of secondary air can further be improved.
  • a hot blast stove for combusting quality fuels comprising, in combination, a furnace shaft, a heat exchanger shaft, a double roof structure cove-ring said furnace shaft and said heat exchanger shaft and composed of an inner roof and of an outer roof, said inner roof and said outer roof being self-contained stabile structures of other than semi-spherical shape and enclosing an intermediate chamber, at least one passage in said outer roof opening into said intermediate chamber, secondary air supply means connected to said passage in said outer roof, a plurality of passages in said inner roof opening into said furnace shaft and said heat exchanger shaft, means for combusting fuel in said furance shaft, and means for abducting hot air from said heat exchanger shaft.
  • a hot blast stove for combusting quality fuels comprising, in combination, a furnace shaft, a heat exchanger shaft, said shafts having refractory wallings, a double roof structure covering said furnace shaft and said heat exchanger shaft and composed of an inner roof and of an outer roof, said inner roof and said outer roof being of self-contained stabile structures of other than semispherical shape and enclosing an intermediate chamber,
  • said double roof structure being supported by a brim Of References Cited by the Examiner said refractory wallings, at least one passage in said UNITED STATES PATENTS outer roof opening into said intermediate chamber, secondary air supply means connected to said passage in 1,339,190 5/ 1920 F said outer roof, a plurality of passages in said inn-er roof FOREIGN PATENTS opening into said furnace shaft and said heat exchanger shaft, means for combusting fuel in said furnace shaft, 732898 3/1943 Germany and means for abducting hot air from said heat exchanger JOHN CAMPBELL Primal ⁇ , Examiner shaft, said abducting means being connected to said brim of aid fra t ni 10 R. F. DROPKIN, Assistant Examiner.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
US426279A 1964-02-03 1965-01-18 Hot blast stoves for combusting quality fuels Expired - Lifetime US3297310A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
HUTU000126 1964-02-03

Publications (1)

Publication Number Publication Date
US3297310A true US3297310A (en) 1967-01-10

Family

ID=11002188

Family Applications (1)

Application Number Title Priority Date Filing Date
US426279A Expired - Lifetime US3297310A (en) 1964-02-03 1965-01-18 Hot blast stoves for combusting quality fuels

Country Status (4)

Country Link
US (1) US3297310A (uk)
BE (1) BE658158A (uk)
LU (1) LU47700A1 (uk)
NL (1) NL6500161A (uk)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3947245A (en) * 1974-07-15 1976-03-30 Koppers Company, Inc. Hot blast stove
US4022573A (en) * 1974-09-20 1977-05-10 S.A. Des Anciens Etablissements Paul Wurth Hot blast stove and method of operation
FR2476134A1 (fr) * 1980-02-15 1981-08-21 Wurth Paul Sa Installation de production de vent chaud et procede mis en oeuvre
NL2003754C2 (en) * 2009-11-04 2011-05-10 Heatteq Refractory Holding B V Method for improving the combustion efficiency of a burner of a hot blast stove, and such a hot blast stove comprising a gas burner.
US20110200958A1 (en) * 2010-02-12 2011-08-18 Van Laar Floris Hot Blast Stove Dome and Hot Blast Stove

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1339190A (en) * 1919-03-26 1920-05-04 Fuller George Freeman Method and apparatus for controlling furnace-temperature
DE732898C (de) * 1940-08-02 1943-03-15 Ludwig Kirchhoff Aufheizvorrichtung fuer Umwaelzgase in Waermoefen

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1339190A (en) * 1919-03-26 1920-05-04 Fuller George Freeman Method and apparatus for controlling furnace-temperature
DE732898C (de) * 1940-08-02 1943-03-15 Ludwig Kirchhoff Aufheizvorrichtung fuer Umwaelzgase in Waermoefen

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3947245A (en) * 1974-07-15 1976-03-30 Koppers Company, Inc. Hot blast stove
US4022573A (en) * 1974-09-20 1977-05-10 S.A. Des Anciens Etablissements Paul Wurth Hot blast stove and method of operation
FR2476134A1 (fr) * 1980-02-15 1981-08-21 Wurth Paul Sa Installation de production de vent chaud et procede mis en oeuvre
NL2003754C2 (en) * 2009-11-04 2011-05-10 Heatteq Refractory Holding B V Method for improving the combustion efficiency of a burner of a hot blast stove, and such a hot blast stove comprising a gas burner.
WO2011056069A2 (en) 2009-11-04 2011-05-12 Heatteq Refractory Holding B.V. Method for improving the combustion efficiency of a burner of a hot blast stove, and such a hot blast stove comprising a gas burner
WO2011056069A3 (en) * 2009-11-04 2011-06-30 Heatteq Refractory Holding B.V. Method for improving the combustion efficiency of a burner of a hot blast stove, and such a hot blast stove comprising a gas burner
US20110200958A1 (en) * 2010-02-12 2011-08-18 Van Laar Floris Hot Blast Stove Dome and Hot Blast Stove
US9194013B2 (en) * 2010-02-12 2015-11-24 Allied Mineral Products, Inc. Hot blast stove dome and hot blast stove

Also Published As

Publication number Publication date
LU47700A1 (uk) 1965-03-02
NL6500161A (uk) 1965-12-27
BE658158A (uk) 1965-04-30

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