US3207597A - Method of adding a liquid fuel to the air blast in a shaft furnace or specifically in a blast furnace - Google Patents
Method of adding a liquid fuel to the air blast in a shaft furnace or specifically in a blast furnace Download PDFInfo
- Publication number
- US3207597A US3207597A US229112A US22911262A US3207597A US 3207597 A US3207597 A US 3207597A US 229112 A US229112 A US 229112A US 22911262 A US22911262 A US 22911262A US 3207597 A US3207597 A US 3207597A
- Authority
- US
- United States
- Prior art keywords
- liquid fuel
- blast
- air blast
- furnace
- specifically
- 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
Links
- 239000000446 fuel Substances 0.000 title description 35
- 239000007788 liquid Substances 0.000 title description 33
- 238000000034 method Methods 0.000 title description 7
- 238000000889 atomisation Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229920000136 polysorbate Polymers 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/001—Injecting additional fuel or reducing agents
Definitions
- This invention relates to a method of adding a liquid fuel such as, for example, a heavy oil or a light oil to the air blast in a shaft furnace or specifically in a blast furnace.
- a liquid fuel such as, for example, a heavy oil or a light oil
- the liquid fuel will be atomized with the help of such gaseous medium as air or steam and the atomized liquid fuel together with the gaseous medium will be added to the air blast.
- An object of the present invention is to provide a new method of adding a liquid fuel to the air blast in a shaft furnace or specifically a blast furnace wherein the above mentioned difficulties and disadvantages can be eliminated.
- the method of the present invention comprises jetting liquid fuel into a conduit pipe between an inlet or a tuyere for introducing the air blast into the furnace and the point where the blast for the inlet is separated from the blast main pipe without the help of any gaseous medium so that the jet of liquid fuel may intersect the direction of the flow of the said air blast for atomizing the said liquid fuel and by adjusting one or more of the factors such as the direction of jetting-in the liquid fuel.
- the size of the jetting port, the temperature of the liquid fuel and the flow velocity of the air blast at the position of the jet, the atomization can be controlled.
- the present invention because no gaseous medium for the purpose of atomizing the liquid fuel is required, the lowering of the combustion temperature in front of the tuyere will be prevented and the heatand material-balance can be correctly calculated and because no equipment for the said gaseous medium is required the installation cost will be reduced. In addition, the operation of the blast furnace will become much simpler. Further, according to the present invention, the length of the liquid fuel conduit which is exposed to heat can be reduced.
- the position of jetting liquid fuels into the air blast is located between the tuyere and the point where the blast for the tuyere is separated from the blast main pipe so that at least a part of the jetted and atomized liquid fuel may burn before coming to the combustion zone within the furnace.
- the said flow velocity of the air blast at the point where the liquid fuel is jetted into the air blast is not adapted to the atomization of the liquid fuel, the said flow velocity should be adjusted with an adjustable flow-choking device in the proper position.
- the pressure of the liquid fuel at the jetting port may be at least equal to the pressure required to jet-in the fuel against the air blast pressure.
- the jetting port may be circular, rectangular, elliptic or of any other shape.
- FIGURE 1 illustrates a liquid fuel jetting port based on the principle of the present invention and positioned in the blow pipe of the blast tuyere of a blast furnace.
- 1 is a tuyere
- 2 is a blow pipe
- 3 is a ring which is provided on the inner periphery of the blow pipe 2 but which will not be required if the required air blast velocity is available.
- 4 is a liquid fuel conduit.
- 5 is a liquid fuel jetting port.
- the arrow A indicates the direction of jetting-in the liquid fuel.
- the arrow B indicates the direction of the air blast.
- the ring 3 is fitted in that part of the blow pipe 2 and its inside diameter D is made to be 130 mm. Under the conditions at which experiments were carried out the flow of the air blast was 770 Nm.
- the pressure of the air blast was 680 g./crn.
- the flow velocity of the air blast in the part fitted with the ring (which will not be required if the required air blast velocity is available) of the blow pipe was 220 m./sec.
- the distance L from the forward end of the tuyere 1 to the point of jetting-in the liquid fuel was varied between 200 and 1500 mm. and the point of jetting-in the liquid fuel was made of a heat-resisting steel such as, for example, SUS 217.
- the inside diameter of the jetting port was 2 to 4 mm.
- the angle on to the direction perpendicular to the direction of the air blast was 0 to 30 directed upstream of the air blast. (See FIGURE 2.)
- a heavy oil at C was jetted at a velocity of 5 to 15 m./ sec. into the air blast under the above mentioned conditions with the above mentioned device, the oil was completely atomized and introduced into the furnace.
- a method of adding liquid fuel to the air blast for a blast furnace comprising the steps of constricting the flow of the air blast through the blow pipe at a point located at a distance of from 200 to 1500 mm. from the end of the tuyere on the end of the blow pipe to adjust the velocity of the air blast so that it is at least 220 m./sec., atomizing the liquid fuel by forcing a stream 3 4 consisting of liquid fuel into a blow pipe at said point References Cited by the Examiner and at an angle to the flow of the air blast which is be- UNITED STATES F tween a perpendicular to the longitudinal axial direction of the blow pipe and to an angle which is 30 from said 325,293 9/85 Weber 2Z6 '29 perpendicular in the upstream direction in said blow pipe, 1 22 $g' g said stream bein forced into the air blast at a flow velocit S ens 4 g y 2,524,476 10/50 Rlchardson 26 629
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Nozzles For Spraying Of Liquid Fuel (AREA)
Description
P 21, 1965 SHIN HASHIMOTO ETAL 3,207,597
METHQD OF ADDING A LIQUID FUEL TO THE AIR BLAST IN A SHAFT FURNACE 0R SPECIFICALLY IN A BLAST FURNACE Filed Oct. 8, 1962 Shin Hashimofa Zensaku Ayuha INVENTORS BY M, Mac/M ATTORNEYS United States Patent Of ice 3,2fi7,597 Patented Sept. 21, 1965 3,207,597 METHOD OF ADDING A LIQUID FUEL TO THE AIR BLAST IN A SHAFT FURNACE R SPECIFI- CALLY IN A BLAST FURNACE Shin Hashimoto and Zensaku Ayuha, Yawata, Fukuoka, Japan, assignors to Yawata Iron 8: Steel Co., Ltd., Tokyo, Japan, a corporation of Japan Filed Oct. 8, 1962, Ser. No. 229,112 Claims priority, application Japan, Oct. 19, 1961, 36/ 37,774 1 Claim. (Cl. 75-42) This invention relates to a method of adding a liquid fuel such as, for example, a heavy oil or a light oil to the air blast in a shaft furnace or specifically in a blast furnace.
Generally, in the case of operating a shaft furnace or specifically a blast furnace by adding a liquid fuel to the air blast thereto, the liquid fuel will be atomized with the help of such gaseous medium as air or steam and the atomized liquid fuel together with the gaseous medium will be added to the air blast.
In such method, as the gaseous medium for the purpose of atomizing the liquid fuel is mixed into the air blast, there arise certain difficulties in the operation. For example as a result of mixing-in the air or steam for the atomization, the combusion temperature in front of the tuyere is lowered, the calculation of the heatand material-balance Within the furnace becomes difficult and the emergency cutoff operation will be complicated and further there are such disadvantages that additional equipment, as an air compressor or a steam generator, is required and the longer part of the liquid fuel conduit must be exposed to the air blast or the hot blast.
An object of the present invention is to provide a new method of adding a liquid fuel to the air blast in a shaft furnace or specifically a blast furnace wherein the above mentioned difficulties and disadvantages can be eliminated.
The method of the present invention comprises jetting liquid fuel into a conduit pipe between an inlet or a tuyere for introducing the air blast into the furnace and the point where the blast for the inlet is separated from the blast main pipe without the help of any gaseous medium so that the jet of liquid fuel may intersect the direction of the flow of the said air blast for atomizing the said liquid fuel and by adjusting one or more of the factors such as the direction of jetting-in the liquid fuel. the size of the jetting port, the temperature of the liquid fuel and the flow velocity of the air blast at the position of the jet, the atomization can be controlled.
According to the present invention, because no gaseous medium for the purpose of atomizing the liquid fuel is required, the lowering of the combustion temperature in front of the tuyere will be prevented and the heatand material-balance can be correctly calculated and because no equipment for the said gaseous medium is required the installation cost will be reduced. In addition, the operation of the blast furnace will become much simpler. Further, according to the present invention, the length of the liquid fuel conduit which is exposed to heat can be reduced.
In the present invention, the position of jetting liquid fuels into the air blast is located between the tuyere and the point where the blast for the tuyere is separated from the blast main pipe so that at least a part of the jetted and atomized liquid fuel may burn before coming to the combustion zone within the furnace.
In case the flow velocity of the air blast at the point where the liquid fuel is jetted into the air blast is not adapted to the atomization of the liquid fuel, the said flow velocity should be adjusted with an adjustable flow-choking device in the proper position.
The pressure of the liquid fuel at the jetting port may be at least equal to the pressure required to jet-in the fuel against the air blast pressure.
The jetting port may be circular, rectangular, elliptic or of any other shape.
It is not necessary that the air blast contains steam or added oxygen for the purpose of the operation.
An embodiment of the present invention shall be explained with reference to the accompanying drawings.
FIGURE 1 illustrates a liquid fuel jetting port based on the principle of the present invention and positioned in the blow pipe of the blast tuyere of a blast furnace.
FIGURE 2 is a detailed view of the jetting port.
The present invention shall be detailed in the following with reference to the embodiment illustrated in the drawlIlgS.
In the drawings, 1 is a tuyere, 2 is a blow pipe and 3 is a ring which is provided on the inner periphery of the blow pipe 2 but which will not be required if the required air blast velocity is available. 4 is a liquid fuel conduit. 5 is a liquid fuel jetting port. The arrow A indicates the direction of jetting-in the liquid fuel. The arrow B indicates the direction of the air blast. In order to increase the flow velocity of the air blast at the point of jetting-in the liquid fuel, the ring 3 is fitted in that part of the blow pipe 2 and its inside diameter D is made to be 130 mm. Under the conditions at which experiments were carried out the flow of the air blast was 770 Nm. min., the pressure of the air blast was 680 g./crn. the flow velocity of the air blast in the part fitted with the ring (which will not be required if the required air blast velocity is available) of the blow pipe was 220 m./sec., the distance L from the forward end of the tuyere 1 to the point of jetting-in the liquid fuel was varied between 200 and 1500 mm. and the point of jetting-in the liquid fuel was made of a heat-resisting steel such as, for example, SUS 217. The inside diameter of the jetting port was 2 to 4 mm. The angle on to the direction perpendicular to the direction of the air blast was 0 to 30 directed upstream of the air blast. (See FIGURE 2.) When a heavy oil at C, was jetted at a velocity of 5 to 15 m./ sec. into the air blast under the above mentioned conditions with the above mentioned device, the oil was completely atomized and introduced into the furnace.
What we claim is:
A method of adding liquid fuel to the air blast for a blast furnace, comprising the steps of constricting the flow of the air blast through the blow pipe at a point located at a distance of from 200 to 1500 mm. from the end of the tuyere on the end of the blow pipe to adjust the velocity of the air blast so that it is at least 220 m./sec., atomizing the liquid fuel by forcing a stream 3 4 consisting of liquid fuel into a blow pipe at said point References Cited by the Examiner and at an angle to the flow of the air blast which is be- UNITED STATES F tween a perpendicular to the longitudinal axial direction of the blow pipe and to an angle which is 30 from said 325,293 9/85 Weber 2Z6 '29 perpendicular in the upstream direction in said blow pipe, 1 22 $g' g said stream bein forced into the air blast at a flow velocit S ens 4 g y 2,524,476 10/50 Rlchardson 26 629 of 5 to 15 m./sec., and burning a part of the atomized liquid fuel between the point at which the fuel is forced I I into the blow pipe and the tuyere on the end of the blow DAVID REOK Prlmary Examiner pipe. 10 WINSTON L. DOUGLAS, Examiner.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3777461 | 1961-10-19 | ||
| FR912819A FR1336598A (en) | 1961-10-19 | 1962-10-19 | Process for adding liquid fuel to the blast of a shaft furnace or more specifically of a blast furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3207597A true US3207597A (en) | 1965-09-21 |
Family
ID=32929254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US229112A Expired - Lifetime US3207597A (en) | 1961-10-19 | 1962-10-08 | Method of adding a liquid fuel to the air blast in a shaft furnace or specifically in a blast furnace |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US3207597A (en) |
| FR (1) | FR1336598A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3505052A (en) * | 1968-07-19 | 1970-04-07 | Saint Gobain Corp | Machine for making wired glass |
| US3833356A (en) * | 1970-10-21 | 1974-09-03 | F Luth | Method and apparatus for injecting oil into the tuyeres of a blast furnace |
| US3837842A (en) * | 1971-08-02 | 1974-09-24 | Sumitomo Metal Ind | A method for projecting pieces of a deoxidizing agent into molten steel |
| US4490171A (en) * | 1982-03-31 | 1984-12-25 | Kobe Steel, Limited | Method and apparatus for injecting pulverized fuel into a blast furnace |
| US4730813A (en) * | 1986-02-25 | 1988-03-15 | Arbed S.A. | Oxygen nozzle for metal refining |
| US4767598A (en) * | 1986-09-22 | 1988-08-30 | Aluminum Company Of America | Injection apparatus for introduction of a fluid material into a molten metal bath and associated method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US325293A (en) * | 1885-09-01 | Process of smelting ore by means of petroleum | ||
| US434706A (en) * | 1890-08-19 | Oil-feeding device for blast-furnaces | ||
| US1393749A (en) * | 1919-12-08 | 1921-10-18 | American Metal Co Ltd | Blast-furnace |
| US2524476A (en) * | 1945-10-25 | 1950-10-03 | Richardson Leslie John | Vertical tuyere-type furnace |
-
1962
- 1962-10-08 US US229112A patent/US3207597A/en not_active Expired - Lifetime
- 1962-10-19 FR FR912819A patent/FR1336598A/en not_active Expired
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US325293A (en) * | 1885-09-01 | Process of smelting ore by means of petroleum | ||
| US434706A (en) * | 1890-08-19 | Oil-feeding device for blast-furnaces | ||
| US1393749A (en) * | 1919-12-08 | 1921-10-18 | American Metal Co Ltd | Blast-furnace |
| US2524476A (en) * | 1945-10-25 | 1950-10-03 | Richardson Leslie John | Vertical tuyere-type furnace |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3505052A (en) * | 1968-07-19 | 1970-04-07 | Saint Gobain Corp | Machine for making wired glass |
| US3833356A (en) * | 1970-10-21 | 1974-09-03 | F Luth | Method and apparatus for injecting oil into the tuyeres of a blast furnace |
| US3837842A (en) * | 1971-08-02 | 1974-09-24 | Sumitomo Metal Ind | A method for projecting pieces of a deoxidizing agent into molten steel |
| US4490171A (en) * | 1982-03-31 | 1984-12-25 | Kobe Steel, Limited | Method and apparatus for injecting pulverized fuel into a blast furnace |
| US4730813A (en) * | 1986-02-25 | 1988-03-15 | Arbed S.A. | Oxygen nozzle for metal refining |
| US4767598A (en) * | 1986-09-22 | 1988-08-30 | Aluminum Company Of America | Injection apparatus for introduction of a fluid material into a molten metal bath and associated method |
Also Published As
| Publication number | Publication date |
|---|---|
| FR1336598A (en) | 1963-08-30 |
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