CN2662079Y - Blast furnace hot blast stove ceramic burner with central circumfluence pole - Google Patents
Blast furnace hot blast stove ceramic burner with central circumfluence pole Download PDFInfo
- Publication number
- CN2662079Y CN2662079Y CN 200320116111 CN200320116111U CN2662079Y CN 2662079 Y CN2662079 Y CN 2662079Y CN 200320116111 CN200320116111 CN 200320116111 CN 200320116111 U CN200320116111 U CN 200320116111U CN 2662079 Y CN2662079 Y CN 2662079Y
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- burner
- air
- center
- gas
- coal gas
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Abstract
The utility model discloses a ceramic burner of the hot stove of blast furnace with a central flow-around cylinder, belonging to the technical field of iron making with the ceramic burner of the hot stove of blast furnace. An air circuit of the burner surrounds outside the gas circuit, and the central flow-around cylinder is arranged at the center of the gas circuit. A guide plate is arranged at the central flow around cylinder, facing the gas inlet; a primary air port is arranged at the lower extended place of a fire pot while a secondary air port is arranged at the upper place of the fire pot; a damping diversion ring is positioned at the top of a protective hat. The utility model has a novel structure, a reasonable design as well as technical excellence. The double peak distribution formed by setting the flow-around cylinder decreases the thickness of airflow and the position of peak flow rate is much closer to the peripheral of the burner than a single peak pattern, which allows penetrating and mixing of the gas flow by the primary and secondary air, decreases the coefficient of air consumption and improves theoretical combustion. The utility model is suitable for various types of hot blast stove.
Description
Technical field
The utility model belongs to blast furnace hot-blast stove technical field, especially ceramic combustor of hot-blast stove technical field.
Background technology
Rise the sixties in last century, and people are used for ceramic burner in the hot-blast stove of metallurgy industry.Because ceramic burner has tangible advantage than the metal burning device, very fast obtaining on hot-blast stove promoted.Through the updating and develop of three more than ten years, the structural shape of ceramic burner has ten more than several at present, is mainly telescopic and the grid type ceramic burner.Sleeve-type ceramic burner obtains extensive use at home, abroad.The grid type ceramic burner is because complex structure is difficult to maintenance again, so their are just used on the large-scale external combustion stove of minority to some extent.
Ceramic burner makes moderate progress the mixing of coal gas and combustion air and the air-flow serious uneven situation that distributes on section of combustion chamber; Under less relatively excess air coefficient, also can realize burning preferably, alleviate burning " pulsation ", have bigger combustion intensity, can obtain higher ignition temperature and hot blast temperature, thereby promote the development that ironmaking is produced to a certain extent.But sleeve-type ceramic burner also exists obvious defects, mainly contains:
(1) mixing of coal gas and combustion air is still relatively poor, and the excess air of employing is still bigger.General excess air surpasses 15%.Individual other in addition up to 25%, still have CO to fail to burn in the waste gas.Excess air and do not burn the raising of CO content has reduced the theoretical temperature combustion of fuel, and then has influenced the raising of hot-blast stove dome temperature and hot blast temperature.
(2) the air-flow deflection is serious in the gas well, and each medium composition distributes serious uneven, has reduced efficiency of combustion and ignition temperature, and the gas well liner is damaged because of the inequality of being heated.
(3) burning still produces " pulsation ", when especially using high heating value gas and adopting bigger excess air coefficient, and " pulsation " easier generation.
(4) internal combustion stove fall brick, can smash the air-distribution cap, and it and center gas pipe are stopped up, reduced the result of use and the life-span of burner.
Summary of the invention
The purpose of this utility model provides a kind of blast funnace hot blast stove ceramic burner that streams post with the center, it has improved the mixture homogeneity of air and coal gas, corrected the eccentricity of fire that the air-flow deflection is caused in the gas well, make burner combustion stable, reduce the air consumption coefficient of fuel combustion simultaneously, improve ignition temperature.
The purpose of this utility model is achieved in that the band center streams the air circuit of the blast funnace hot blast stove ceramic burner of post and be looped around outside the coal gas circuit, the coal gas circuit that is arranged at burner central authorities is directly leading to fire pot, is provided with the center of running through the coal gas circuit in the central authorities of coal gas circuit and streams post.The height that post is streamed at the center can reach the height of protective cap.Stream cylinder at the center gas entry place is provided with deflector, the horizontal sextant angle of deflector is 0-80 °, and the guide face shape of deflector is plane, cambered surface or curved surface.Primary air nozzle is being arranged on bottom expansion place of fire pot, and the extended line angle of two corresponding primary air nozzle center lines is 100-180 ° on the burner central plane; Overfiren air port is being arranged on the top of fire pot, and is adjacent with the bottom of protective cap, and the extended line angle of two corresponding overfiren air port center lines is 40-70 ° on the burner central plane.Described primary air nozzle area is the 0-40% of overfiren air port area.On protective cap, also be provided with the damping guide ring.
The utility model novel structure, reasonable in design, obvious technical effects.The result of the test that laboratory makes of simulation model proves: do not add the center and stream the centre of the ceramic burner gas speed maximum region of post at coal gas stream, Velocity Profiles is rendered as unimodal shape (as shown in Figure 3), this burner gas speed maximum region of post is streamed in the zone near the gas passage periphery in the center of being provided with, gas velocity distribution circuit presents bimodal shape (as shown in Figure 2), this being distributed with is beneficial to air stream to the penetrating and mix of coal gas stream, and helps the tissue of combustion process.The distribution of bimodal shape has reduced the thickness of air-flow, the position at peak flow rate (PFR) place is more than the periphery of unimodal shape near burner, help wind and secondary wind to the penetrating and mix of coal gas stream, to smooth combustion, reduce the air consumption coefficient and improve theoretical temperature combustion and all played very big effect.Primary air nozzle has certain inclination angle in the utility model, and the inclination angle of secondary wind is bigger, helps the stable ignition burning in gas well of sky, gas mixture like this.For making flame in combustion chamber (gas well), deflection not take place, guarantee mixing empty, coal gas, coal gas stream and air stream must evenly distribute at the burner circumferencial direction.Coal gas deflector helps the raising of the coal gas distribution uniformity, the result that we measure with laboratory model, and the distribution uniformity before the coal gas deflector is 81.07%, the distribution uniformity has improved 11.39% behind the coal gas deflector, has reached 92.46%.The utility model is applicable to various types of hot-blast stoves.
Description of drawings
Accompanying drawing 1 is the utility model burner structure schematic diagram;
Accompanying drawing 2 waters the gas speed distribution schematic diagram of fluidization tower for the band center;
Accompanying drawing 3 waters the gas speed distribution schematic diagram of fluidization tower for band center not.
Accompanying drawing acceptance of the bid keep the score state as follows: 1---the combustion chamber big-wall; 2---the damping guide ring; 3---protective cap; 4---overfiren air port; 5---fire pot; 6---primary air nozzle; 7---the air circuit; 8---post is streamed at the center; 9---the coal gas circuit; 10---fire hole; 11---overfiren air port center angle; 12---primary air nozzle center angle; 13---the combustion air inlet; 14---deflector; 15---gas entry, 16---air uptake.
The specific embodiment
Below in conjunction with accompanying drawing most characteristic part of the present utility model is described in further detail.As shown in drawings; the gas passage 9 of burner of the present utility model is arranged on the central authorities of burner, and air duct 7 is looped around outside the gas passage, and the central authorities of gas passage are provided with the center and stream post 8; the center is streamed post 8 and is connected gas passage, and the height that the post height is no more than protective cap is streamed at the center.Be provided with coal gas deflector 14 over against gas entry 15 places streaming post, the shape of the guide face of deflector 14 is plane, cambered surface or curved surface.Post and coal gas deflector are streamed in this ceramic burner band coal gas center, have eliminated the eddy current loss of gas entry, and rationalization's coal gas flowing in passage reduces drag losses.The gas passage system belongs to the very little pipe streaming system of resistance to flow output.Air-flow turns round the back owing to effect of inertia, and post is streamed at the center of walking around, and main flow rushes at the inlet opposite and rises then.On any cross section before primary air mixes, the flow field is rendered as bimodal shape (seeing shown in the accompanying drawing 2), is an annulus at circumferencial direction; Not adding the coal gas center streams the Velocity Profiles of post and is rendered as unimodal shape (seeing shown in the accompanying drawing 3).Obviously, the Velocity Profiles that post is streamed at the center of being added with presents the thickness that bimodal shape has reduced air-flow, the position at peak flow rate (PFR) place is more than the periphery of unimodal shape near burner, this VELOCITY DISTRIBUTION helps wind and secondary wind to the penetrating and mix of coal gas stream, to smooth combustion, reduce the air consumption coefficient and improve theoretical temperature combustion and play very big effect.
From pneumatic viewpoint, every gas vent has the porous channel in the uniform cavity of resistance, the even distributivity of air-flow is relatively good, and the air stream outlet section is more little with the ratio of this place's annular section gross area, be that resistance is big more, air-flow distributes even more, and in other words the uniformity of air-flow is that cost brings to sacrifice resistance.Evenly ejection also is the improvement sky to air, coal gas mixes and the important and crucial measure of rationalization's burning around coal gas.The factor that influence is empty, coal gas mixes is the angle of cut of free air-flow and coal gas stream; Air spouting velocity and coal gas spouting velocity; The penetration depth that air stream flows coal gas etc.Obviously, the angle of cut of air and coal gas is big more, and it is good more to mix, but the excessive flame shakiness that occurs easily of the angle of cut, and the resistance of increase gas passage.Find when a wind is injected the angle and tested: air channel is perpendicular to coal gas stream strand, and big to the penetration capacity of coal gas stream, gas flow is little; The tilting penetration capacity is little, but gas flow is big under same pressure reduction.Determine a wind inject the angle time, take all factors into consideration the pressure loss and two aspects of penetration depth of coal gas.The center angle of a wind is bigger in the utility model, and the center angle of overfiren air port is less, helps the mutual ejector action of space gas like this, thus the good mixing effect of space gas, flame stabilization, thermal efficiency height.In addition, being provided with of protective cap 3 can be played the protection air port and gas passage is not fallen the effect that brick smashes and stops up, and the setting of shock ring 2 can also be played the effect of water conservancy diversion except that cushioning effect.
Claims (7)
1, a kind ofly stream the blast funnace hot blast stove ceramic burner of post with the center, contain air, coal gas circuit, first and second air port fire pot, air, gas entry, protective cap and fire hole; It is characterized in that: described air circuit (7) is looped around outside the coal gas circuit (9) that is arranged at burner central authorities, and the central authorities of coal gas circuit (9) are provided with the center and stream post (8).
2, burner according to claim 1 is characterized in that: the height that post (8) is streamed at described center is no more than the height of protective cap (3).
3, burner according to claim 1 is characterized in that: stream post (8) at the center and locate to be provided with deflector (14) in the face of gas entry (15).
4, according to claim 1 or 3 described burners, it is characterized in that: the horizontal sextant angle of deflector is 0-80 °, and the shape of the guide face of deflector is plane, cambered surface or curved surface.
5, burner according to claim 1 is characterized in that: described primary air nozzle (6) is being arranged on bottom expansion place of fire pot (5), and the extended line angle (12) of two corresponding primary air nozzle center lines is 100-180 ° on the burner central plane; Overfiren air port (4) is being arranged on the top of fire pot (5), and is adjacent with the bottom of protective cap (3), and the extended line angle of two corresponding overfiren air port center lines is 40-70 ° on the burner central plane.
6, burner according to claim 1 is characterized in that: also be provided with damping guide ring (2) on protective cap (3).
7, burner according to claim 1 is characterized in that: described primary air nozzle area is the 0-40% of overfiren air port area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320116111 CN2662079Y (en) | 2003-11-28 | 2003-11-28 | Blast furnace hot blast stove ceramic burner with central circumfluence pole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320116111 CN2662079Y (en) | 2003-11-28 | 2003-11-28 | Blast furnace hot blast stove ceramic burner with central circumfluence pole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2662079Y true CN2662079Y (en) | 2004-12-08 |
Family
ID=34346175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200320116111 Expired - Lifetime CN2662079Y (en) | 2003-11-28 | 2003-11-28 | Blast furnace hot blast stove ceramic burner with central circumfluence pole |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2662079Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100557311C (en) * | 2008-04-17 | 2009-11-04 | 郑州豫兴耐火材料有限公司 | The upwards ceramic burner of spout is arranged on the circumferential circuit of slope scalariform |
| CN102042593B (en) * | 2009-10-15 | 2012-08-22 | 周佳强 | Compound burner |
-
2003
- 2003-11-28 CN CN 200320116111 patent/CN2662079Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100557311C (en) * | 2008-04-17 | 2009-11-04 | 郑州豫兴耐火材料有限公司 | The upwards ceramic burner of spout is arranged on the circumferential circuit of slope scalariform |
| CN102042593B (en) * | 2009-10-15 | 2012-08-22 | 周佳强 | Compound burner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20031128 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |