US3568932A - Ceramic burners - Google Patents

Ceramic burners Download PDF

Info

Publication number
US3568932A
US3568932A US867988A US3568932DA US3568932A US 3568932 A US3568932 A US 3568932A US 867988 A US867988 A US 867988A US 3568932D A US3568932D A US 3568932DA US 3568932 A US3568932 A US 3568932A
Authority
US
United States
Prior art keywords
holes
central hole
rows
crown
burner according
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
US867988A
Other languages
English (en)
Inventor
Jacobus Van Laar
Johannes H W Ouwerkerk
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.)
Didier Werke AG
Original Assignee
Didier Werke AG
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 Didier Werke AG filed Critical Didier Werke AG
Application granted granted Critical
Publication of US3568932A publication Critical patent/US3568932A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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

Definitions

  • CERAMIC BURNERS [5 6] References Cited UNlTED STATES PATENTS 2,437,042 3/1948. Prosser et a1. 239/430X A [72] Invent rs Ja lls Bll 3,185,458 5/1965 Reed 431/190X Santpoort;
  • The'central hole has essentially the shape of a rectangular slot and the sloping part of the upper surface of the block comprising essentially two flat surfaces which comprise an angle of 40 1 20, and the crown of holes is subidvided into two rows of holes running parallel to each other and to the longitudinal sides of said central hole.
  • the rectangular shape of the central hole shows a ratio of length versus width between 4:1 and 6:1 and the slot width is less than 600 mm.
  • Each of the two rows of holes has at least four holes the middle axis of which form together with the prolongation of the axis of the central hole an angle ranging from CERAMIC BURNERS
  • the invention refers to a ceramic burner, particularly to be used in .hot blast stoves for blast furnaces comprising a first vertical conduit for the feeding of gaseous combustible fuel and a second coaxial conduit for the feeding of combustion air, whereby the conduits on their upper ends pass into a ceramic block through perforations, namely into a central hole with a crown of holes around it, whereby the upper surface of the block runs inclined from the central hole upwards and theholes of the crown are directed towards the prolonged axis of the central hole.
  • Ceramic burners of the types mentioned above are presently common construction elements in hot blast stoves for blast furnaces. They constitute a process as compared to the formeily common metal burners which were installed outside the combustion chamber of the hot blast stove. With the ceramic burner being built into the hot blast stove a considerably higher cupola temperature can be attained, without the burner suffering any damage by it. Moreover it is possible to avoid, through a ceramic burner installed vertically inside a combustion chamber the rebounding of the flames on the separation wall between the combustion chamber and the lattice work, particularly inthe place where the difference of temperature between the combustion chamber and the lattice work should be the highest. Thus the separation wall and the lattice work are both greatly spared.
  • the known ceramic burners have a round or oval-shaped exit opening at the (central hole for the fuel supply.
  • the holes of the surrounding crown are slot'shaped and equal in size.
  • the known ceramic burners represent a considerable improvement over the older metal burnersthey can still be improved.
  • On top of the cupola and under the lattice work of the hot blast stove an important amount of unburned gases can be measured, mainly CO and this notwithstanding the fact that a sufficient supply of combustion air has been provided. Even at this, the economy of the installation is not yet optimal. Also the combustion is uneven, particularly in the lower part of the combustion chamber. An object of the present invention is to eliminate these imperfections.
  • a further object is to secure a better control and mixing of the fuel and air up until it arrives into the flame thereby influencing the evenness and completeness of the combustion.
  • a further object is to provide a construction wherein the central hole essentially has the shape of a rectangular slot with the sloping part of the upper surface'of the block composed essentially of two flat surfaces making an angle of -l20 and preferably 60-90 and having the crown of holes subdivided into two rows of holes parallel to each other and to the sides of the central hole.
  • the advantageous effect of the new burner should be attributed to the very intensive mixing of air and fuel, which because of this shape of the burner can be achieved.
  • the air jets which penetrate the relatively narrow jet of fuel and specifically adapted shape of the upper surface of the block prevent the possibility that fuel and air jets that are unmixed,
  • An object of the invention is also the specific distribution of the holes of both rows to each other.
  • the expert would consider it useful, in order to improve the mixture of gas and air, that the different holes are distributed at different heights. To be sure such a distribution is also covered by the invention, but surprisingly enough, in the burner according to the inven tion better results have been obtained when the holes on both rows are distributed on the same height.
  • FIG. 1 shows schematically a hot blast stove with a built in burner in a longitudinal section
  • FIG. 3 is a section according to line lII-III in FlG. 2.
  • FIG. 1 the housing of a hot blast stove is designated by l and 2 is the bottom on which it stands, forming together a brick entity.
  • the brick housing is surrounded by a steel casing (not shown).
  • a number of pillars 3 projecting out of the bottom 2 support a lattice 4, which in turn serves for supporting the perforated stones piled up on it (not shown) through which is led alternately hot fuel gas from the top down and air to be heated from the bottom upwardsQ
  • This so-called lattice work construction is separated by a wall 5 from the combustion chamber, which towards the outside is limited by a section of the housing 1.
  • the hot blast stove is shut off on the top by a brick cupola 6 and a steel cupola 7.
  • the gaseous fuel material necessary for the conservation of the hot fuel gases and the air are led through a conduit 8 and/or a ring conduit 9 to the combustion block 10.
  • the burner is indicated only schematically in FIG. 1. Above the burner the fuel material and the air are intimately mixed and the fuel material is burned inxthe combustion chamber.
  • FIG. 2 shows the burner and its surroundings in detail and on an enlarged scale.
  • FIG. 3 shows a detail of it in a longitudinal section, petpendicular to that of FIG. 2. This detail show only half, the other half is symmetrical to it.
  • Central conduit 8 for the fuel material connects to a central hole 16 in block 10.
  • This block is made of ceramic material the same as the walls of conduits 8 and 9 and the walls 1 and 5 of the combustion chamber.
  • the central hold 16 has a rectangular shape with a ratio of length and width of approximately 5:1.
  • two rows of openings 17 discharge, which are connected with conduit 9. These openings 17 have a rectangular shape, with the short sides of the rectangle of the opening aligned head-on, on each row.
  • Openings 1'7 in each row are placed staggered to the openings of the other row, so that jets of combustion air alternately blow out of the openings beside each other. This can be obtained when the upper surface 18 of the ceramic block is essentially formed by two flat surfaces forming together an angle of about 90.
  • This shape of the burning block insures an optimal mixture of the fuel material and air, when only the fuel material and the air actually escape uniformly out of the sectional area of hole 16 and/or openings 17.
  • the latter is obtained by having both conduits 8 and 9 provided with a narrowing down as shown at 19 and 20.
  • a ceramic burner to be used particularly in hot blast stoves for blast furnaces comprising a ceramic block having perforations, a vertical conduit for the feeding of gaseous fuel, a second coaxial conduit for the supply of combustion air, said conduits having their upper ends passing through said perforations, said perforations comprising a central hole and a crown of holes on each side of the central hole, the upper surface of said block slanting upwardly from said central hole and the holes of said crown being directed toward the prolonged axis of said central hole, said central hole having essentially the shape of a rectangular slot, the sloping part of the upper surface of said block comprising essentially two flat surfaces which comprise an angle of 40-l20, and said crown of holes being subdivided into two rows of holes running parallel to each other and to the longitudinal sides of said central hole.
  • each of said two rows of holes has at least four holes the middle axis of which form together with the prolongation of the axis of said central hole an angle ranging from 20 to 70.
  • Burner according to claim ll wherein said holes of one row are staggered with respect to the other row.
  • both of said rows of holes of the crown are slot shaped and their greatest dimension is vertically aligned to the longitudinal direction of said central hole.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Gas Burners (AREA)
  • Baking, Grill, Roasting (AREA)
US867988A 1968-10-19 1969-10-17 Ceramic burners Expired - Lifetime US3568932A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681803984 DE1803984B2 (de) 1968-10-19 1968-10-19 Keramische verbrennungseinrichtung fuer turmartige winder hitzer

Publications (1)

Publication Number Publication Date
US3568932A true US3568932A (en) 1971-03-09

Family

ID=5710913

Family Applications (1)

Application Number Title Priority Date Filing Date
US867988A Expired - Lifetime US3568932A (en) 1968-10-19 1969-10-17 Ceramic burners

Country Status (8)

Country Link
US (1) US3568932A (tr)
JP (1) JPS4933373B1 (tr)
AT (1) AT297905B (tr)
BE (1) BE740316A (tr)
DE (1) DE1803984B2 (tr)
FR (1) FR2021086A1 (tr)
GB (1) GB1290503A (tr)
LU (1) LU59663A1 (tr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3837793A (en) * 1971-05-10 1974-09-24 Koninklijke Hoogovens En Staal Ceramic burner for use in an air-preheater or hot blast stove for a blast furnace plant
US4086052A (en) * 1975-09-20 1978-04-25 Didier-Werke Ag Ceramic burner for combustion chamber for hot-blast stove
US4614496A (en) * 1983-10-05 1986-09-30 Chen Binglin Cowper having no combustion shaft
US4668180A (en) * 1982-11-24 1987-05-26 Newman Ray L Ceramic burner having high turndown ratio
US4717334A (en) * 1982-11-24 1988-01-05 Gte Products Corporation Ceramic burner having high turndown ratio
US4726763A (en) * 1982-09-24 1988-02-23 Gte Products Corporation Dual insulated ceramic burner
US4881895A (en) * 1987-08-31 1989-11-21 Hoogovens Groep B.V. Ceramic gas burner for a combustion chamber of a hot-blast stove

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0090096B1 (en) 1982-03-30 1985-05-08 Hoogovens Groep B.V. A ceramic burner for gas, particularly for a hot-blast stove for a blast furnace
NL8901620A (nl) * 1989-06-27 1991-01-16 Hoogovens Groep Bv Keramische brander en een daarvoor geschikte vormsteen.

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2437042A (en) * 1944-05-29 1948-03-02 Illinois Clay Products Co Material projecting apparatus
US3185458A (en) * 1963-05-13 1965-05-25 Zink Co John Direct fired air heater

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2437042A (en) * 1944-05-29 1948-03-02 Illinois Clay Products Co Material projecting apparatus
US3185458A (en) * 1963-05-13 1965-05-25 Zink Co John Direct fired air heater

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3837793A (en) * 1971-05-10 1974-09-24 Koninklijke Hoogovens En Staal Ceramic burner for use in an air-preheater or hot blast stove for a blast furnace plant
US4086052A (en) * 1975-09-20 1978-04-25 Didier-Werke Ag Ceramic burner for combustion chamber for hot-blast stove
US4726763A (en) * 1982-09-24 1988-02-23 Gte Products Corporation Dual insulated ceramic burner
US4668180A (en) * 1982-11-24 1987-05-26 Newman Ray L Ceramic burner having high turndown ratio
US4717334A (en) * 1982-11-24 1988-01-05 Gte Products Corporation Ceramic burner having high turndown ratio
US4614496A (en) * 1983-10-05 1986-09-30 Chen Binglin Cowper having no combustion shaft
US4881895A (en) * 1987-08-31 1989-11-21 Hoogovens Groep B.V. Ceramic gas burner for a combustion chamber of a hot-blast stove

Also Published As

Publication number Publication date
DE1803984A1 (de) 1970-04-30
AT297905B (de) 1972-04-10
FR2021086A1 (tr) 1970-07-17
BE740316A (tr) 1970-03-16
LU59663A1 (tr) 1970-01-12
DE1803984B2 (de) 1972-02-17
GB1290503A (tr) 1972-09-27
JPS4933373B1 (tr) 1974-09-06

Similar Documents

Publication Publication Date Title
RU2539011C2 (ru) Воздухораспределительное устройство для первичного воздуха в коксовальных печах
US3568932A (en) Ceramic burners
UA109725C2 (uk) Пристрій і спосіб для термічної обробки грудкового або агломерованого матеріалу
US3729286A (en) Heating furnace provided with high velocity gas burners
US3837793A (en) Ceramic burner for use in an air-preheater or hot blast stove for a blast furnace plant
US3601377A (en) Shaft furnaces
US2540359A (en) Furnace
RU2618635C1 (ru) Щелевая горелка с принудительной подачей воздуха
SU602555A1 (ru) Доменный воздухонагреватель
US1805151A (en) Lime kiln
US3405923A (en) Side wall firing system for multi-stand annealing covers
CN203980279U (zh) 逆向燃气辐射装置
SU1654272A1 (ru) Горелка реактора дл термообработки микропорошков
US3102720A (en) Heat treating furnace
CN203980277U (zh) 逆向燃气红外辐射装置
US3208504A (en) Gas-fired furnace element
SU434226A1 (ru) Радиационная горелка
US3207202A (en) Burner for furnaces
GB1324297A (en) Ceramic burner
US1452887A (en) Gas-fired oven or kiln
PL90324B1 (tr)
SU783547A2 (ru) Подина печи кип щего сло дл обжига сыпучего материала
US3023478A (en) Gas-fired kiln
US1763925A (en) Furnace structure
US967607A (en) Brick-kiln furnace.