US3373981A - Apparatus for operating a burner fired shaft furnace - Google Patents

Apparatus for operating a burner fired shaft furnace Download PDF

Info

Publication number
US3373981A
US3373981A US459071A US45907165A US3373981A US 3373981 A US3373981 A US 3373981A US 459071 A US459071 A US 459071A US 45907165 A US45907165 A US 45907165A US 3373981 A US3373981 A US 3373981A
Authority
US
United States
Prior art keywords
furnace
burners
burner
operating
shaft furnace
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
US459071A
Other languages
English (en)
Inventor
Taubmann Harro
Boderke Hubert
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 US3373981A publication Critical patent/US3373981A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • 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
    • F27B1/08—Shaft or like vertical or substantially vertical furnaces heated otherwise than by solid fuel mixed with charge

Definitions

  • the present invention employs stage burners provided with two combustion chambers and interposed guide or conduit means with the first combustion chamber located at the inlet end of the second combustion chamber and at substantially right angles thereto.
  • stage burners provided with two combustion chambers and interposed guide or conduit means with the first combustion chamber located at the inlet end of the second combustion chamber and at substantially right angles thereto.
  • Honeycomb-like nozzle blocks may be arranged in the outlet openings discharging into the furnace shaft in order to improve the penetration effect of the outfiowing gases through the loose material being treated and such blocks may, of course, also be built into burners which do not operate according to the twostage principle.
  • the present invention relates essentially to the distribution and apportionment of the fuel to the burners of a shaft furnace, to the dosing of the cooling air and to the detailed construction of the burners, especially when the burners are disposed in two superposed planes.
  • An object of the invention is, depending upon the heat treatment method to be carried out and the type of material to be heat treated, that the quantity of fuel required for the heat treatment of the material be subdivided differentially or uniformly to the individual burners, that the combustion in the burners of the individual burner planes or levels take place differentially or uniformly stoichiometrically, sub-stoichiometrically or superstoichiometrically, and that the quantity of cool air be measured or dosed.
  • the heat distribution in the furnace can always be adapted to the particular heat treatment to be carried out and which is therefore of enhanced effect.
  • the present invention employs stage burners provided with two combustion chambers and interposed guide or conduit means with the first combustion chamber located at the inlet end of the second combustion chamber and at substantial- :ly right angles thereto.
  • stage burners provided with two combustion chambers and interposed guide or conduit means with the first combustion chamber located at the inlet end of the second combustion chamber and at substantial- :ly right angles thereto.
  • Honeycomb-like nozzle blocks may be arranged in the outlet openings discharging into the furnace shaft in order to improve the penetration effect of the outflowing gases through the loose material being treated and such blocks may, of course, also be built into burners which do not operate according to the two-stage principle.
  • a further object of the present invention is to improve the operation of a shaft furnace for the heat treatment of loose material as described in our application Ser. No. 303,622 filed Aug. 21, 1963, entitled, A Burner Fired Shaft Furnace and Process for Operating the Same, now abandoned.
  • the furnace is provided with burners located in the outer wall and which is operated by the blowing in of air under pressure, it being possible to withdraw gas from the top of the furnace and to reintroduce the same into the lower part of the furnace.
  • the furnace is provided with pressure burners which are distributed about the periphery of the furnace in one plane and which selectively produce completely burned or still burnable gas, with combustion chambers which open into the furnace interior, and are provided with outlet nozzles directed horizontally or substantially horizontally toward the furnace center, and are also provided with connections for furnace waste gases and fresh air.
  • pressure burners which are distributed about the periphery of the furnace in one plane and which selectively produce completely burned or still burnable gas
  • combustion chambers which open into the furnace interior, and are provided with outlet nozzles directed horizontally or substantially horizontally toward the furnace center, and are also provided with connections for furnace waste gases and fresh air.
  • FIG. 1 is a partial longitudinal section taken through a shaft furnace equipped according to the present invention.
  • FIG. 2 is a sectional view taken along section line 2-2 of FIGURE 1, on an enlarged scale.
  • FIG. 3 is a sectional view taken along section line 33 of FIGURE 2, on an enlarged scale.
  • FIGS. 4 and 5 are sectional views taken along section lines 4-4 and 5-5 of FIGURE 3 respectively.
  • FIG. 6 is an elevational view of a honeycomb nozzle block
  • I FIG. 7 is a diagrammatic View showing the direction of burning in the present invention.
  • the furnace wall 1 of the shaft furnace encloses the shaft 2 and in the wall 1 there are arranged a plurality of burners 55 in two planes 56 and 57 extending transversely of the furnace with the shaft cross-section of each burner plane 56 and 57 being widened.
  • the burners consist of a combustion chamber 58 discharging at one end into the furnace and at the other end there is a small pre-combustion chamber 59.
  • the two combustion chambers 58 and 59 are disposed at right angles to one another.
  • a guide means 60 is provided between the combustion chambers.
  • the smaller primary combustion chamber 59 has an air connection 61 and a fuel connection 62, while the larger secondary combustion chamber 58 is provided only with a fuel connection 63.
  • the guide means 60 as shown particularly in FIGURES 3, 4 and 5 constitutes a first tubular portion at the outlet end of the combustion chamber 59 as shown in FIGURE 4 and which then gradually is converted into the rectangular cross-section as shown in FIGURE 5. From there it extends so as to encircle spirally the combustionchamber 58 at the inlet end thereof.
  • honeycomb-like nozzle blocks are shown at 74 which can be inserted at the outlet end 76 of the burners.
  • Such a block as shown in FIG. 6 is provided with the apertures 75.
  • a small portion of the fuel is burned in the smaller combustion chamber 59 with an excess of air, after which the resultant combustion gases pass through the guiding means 60 into the larger secondary combustion chamber 58, into which the major part of the fuel is sprayed which is gasified by the hot combustion gases from the first combustion chamber 59.
  • the thus-produced hot oil gases enter into the furnace at a velocity which makes possible penetration of the bulk material as far as the furnace shaft axis or center 70.
  • the oil gases from the lower burner plane 57 with burners 71 come into contact with cooling air ascending through the shaft 2 from the lower end thereof and are preheated by the material being treated, and burn at a temperature of 1000 to 1100 C.
  • the resultant combustion gases which have an oxygen content of about 12 to 15%, flow to the upper burner level 56 with the burners 58, while treating the bulk material en route, and at such upper level mix with the oil gases coming from the burners at this level and which, because of oxygen deficiency, burn gently and slowly so that superheating of the material is excluded.
  • Heating device for a burner heated blast furnace serving for the heat treatment of bulk material, driven under pressure by forcing undergrate blast into the same and by heating gases manufactured by pressure burners, whereby fresh air may be added to the controllable constructed burners for the selective production of burned out or still burnable gases, being a mixture of furnace gases and intake air or undergrate blast air prewarmed in the furnace and withdrawn below the burner, comprising a vertical shaft furnace, burners with two series-connected combustion chambers located at the side of said furnace, fuel supply connections for said burner combustion chambers independent from another, guide means connecting said combustion chambers arranged between them guiding the stream of gas manufactured in the first chamber into the second chamber.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
US459071A 1964-05-29 1965-05-26 Apparatus for operating a burner fired shaft furnace Expired - Lifetime US3373981A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEW0036875 1964-05-29

Publications (1)

Publication Number Publication Date
US3373981A true US3373981A (en) 1968-03-19

Family

ID=7601327

Family Applications (1)

Application Number Title Priority Date Filing Date
US459071A Expired - Lifetime US3373981A (en) 1964-05-29 1965-05-26 Apparatus for operating a burner fired shaft furnace

Country Status (3)

Country Link
US (1) US3373981A (de)
AT (1) AT264354B (de)
DE (1) DE1433882A1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3418108A (en) * 1965-12-17 1968-12-24 Ind Science Corp Externally fired cupola furnace and method of operation thereof
US4232854A (en) * 1978-05-26 1980-11-11 Barbakadze Dzhondo F Method of introducing powdered reagents into molten metals and apparatus for effecting same
US5070797A (en) * 1986-12-24 1991-12-10 Georg Fischer Ag Process and device to feed additives into a shaft or cupola furnace
US5161967A (en) * 1986-12-24 1992-11-10 Georg Fischer Ag Process and device to feed additives into a shaft or cupola furnace
US5307748A (en) * 1993-03-12 1994-05-03 Institute Of Gas Technology Cyclonic thermal treatment and stabilization of industrial wastes

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US513945A (en) * 1894-01-30 William a
US1197985A (en) * 1914-08-14 1916-09-12 Charles F Williams Heater.
US1841463A (en) * 1930-03-20 1932-01-19 Surface Combustion Corp Safety pilot apparatus
US2282551A (en) * 1938-12-12 1942-05-12 Drying Systems Inc Burner safety control
US2670946A (en) * 1950-10-31 1954-03-02 Pickands Mather & Co Apparatus for magnetic roasting
FR1244302A (fr) * 1956-10-30 1960-10-28 Brûleur à gaz
US3204936A (en) * 1961-06-21 1965-09-07 Beckenbach Karl Shaft furnace
US3275062A (en) * 1964-05-22 1966-09-27 Submerged Comb Inc Heating, evaporating and concentrating apparatus and processes

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US513945A (en) * 1894-01-30 William a
US1197985A (en) * 1914-08-14 1916-09-12 Charles F Williams Heater.
US1841463A (en) * 1930-03-20 1932-01-19 Surface Combustion Corp Safety pilot apparatus
US2282551A (en) * 1938-12-12 1942-05-12 Drying Systems Inc Burner safety control
US2670946A (en) * 1950-10-31 1954-03-02 Pickands Mather & Co Apparatus for magnetic roasting
FR1244302A (fr) * 1956-10-30 1960-10-28 Brûleur à gaz
US3204936A (en) * 1961-06-21 1965-09-07 Beckenbach Karl Shaft furnace
US3275062A (en) * 1964-05-22 1966-09-27 Submerged Comb Inc Heating, evaporating and concentrating apparatus and processes

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3418108A (en) * 1965-12-17 1968-12-24 Ind Science Corp Externally fired cupola furnace and method of operation thereof
US4232854A (en) * 1978-05-26 1980-11-11 Barbakadze Dzhondo F Method of introducing powdered reagents into molten metals and apparatus for effecting same
US5070797A (en) * 1986-12-24 1991-12-10 Georg Fischer Ag Process and device to feed additives into a shaft or cupola furnace
US5161967A (en) * 1986-12-24 1992-11-10 Georg Fischer Ag Process and device to feed additives into a shaft or cupola furnace
US5307748A (en) * 1993-03-12 1994-05-03 Institute Of Gas Technology Cyclonic thermal treatment and stabilization of industrial wastes

Also Published As

Publication number Publication date
DE1433882A1 (de) 1969-01-09
AT264354B (de) 1968-08-26

Similar Documents

Publication Publication Date Title
US3105540A (en) Method of and apparatus for burning low heat content fuel
JPS60235910A (ja) 低負荷燃焼対策のバ−ナ
SU955866A3 (ru) Устройство дл подачи и сжигани дополнительного топлива в шахтной печи
US5059117A (en) Radiant tube furnace and method of burning a fuel
US3373981A (en) Apparatus for operating a burner fired shaft furnace
US3369587A (en) Burners for liquid, gaseous and pulverulent fuels
US3204936A (en) Shaft furnace
US2876831A (en) Internal-combustion burners
US2491705A (en) Open-hearth furnace
US3078914A (en) Burner
US2687879A (en) Process for heating solid materials, particularly for the calcination of limestone
US3197184A (en) Apparatus for heating metals to high temperatures
US2976855A (en) Combustion apparatus for low heat value fuel
US3429300A (en) Industrial furnace burner
US3405923A (en) Side wall firing system for multi-stand annealing covers
US1332684A (en) Method of furnace-heating
US3115120A (en) Apparatus for burning low heat value fuels
US3392969A (en) Installation and method for firing materials such as limestone
US3846066A (en) Fuel burner apparatus
GB1216042A (en) Method and device for injecting liquid fuel into a shaft furnace
GB870649A (en) Improvements in or relating to furnaces or kilns for calcining solid material
US3035823A (en) Oil and/or gas fired vertical furnace and method
US3612498A (en) Apparatus for heating and controlling kiln atmosphere
US2180041A (en) Tunnel kiln
US1539879A (en) Regenerative furnace and method of firing furnaces