CN212857738U - Novel energy-conserving ladle of wall heating toasts device - Google Patents
Novel energy-conserving ladle of wall heating toasts device Download PDFInfo
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- CN212857738U CN212857738U CN202020992914.1U CN202020992914U CN212857738U CN 212857738 U CN212857738 U CN 212857738U CN 202020992914 U CN202020992914 U CN 202020992914U CN 212857738 U CN212857738 U CN 212857738U
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Abstract
The utility model relates to the technical field of metallurgy, and discloses a novel energy-saving ladle baking device with wall heating, which comprises a ladle cover and a bottom burner; the ladle cover consists of a cover plate and a cylindrical inner cavity, the outer edge of the cover plate completely covers the upper opening of the ladle, a hole is formed in the cover plate, the inner cavity is of a closed cavity structure with an opening at the upper end, the upper end of the inner cavity is hermetically fixed on the lower side of the cover plate, and the opening of the cover plate is positioned at the upper part of the inner cavity; the bottom burner is arranged at the bottom end of the inner cavity, a nozzle of the bottom burner penetrates through the opening of the inner cavity and is arranged outside the bottom end of the inner cavity, and the fuel channel and the combustion improver channel extend into the inner cavity from the opening of the cover plate and are connected with the bottom burner; and a fire-resistant layer is arranged on the surface of the ladle cover. The utility model has the advantages that: the distance between the flame and the ladle bottom is shortened, the refractory material at the ladle bottom is directly baked, and meanwhile, the side surface burner is adopted to directly bake the side wall of the ladle in a short distance, so that the baking time is shortened, and the fuel is saved; the fuel consumption is reduced by 30-50%, the baking time is shortened by 20-30%, and the NOx emission is reduced.
Description
Technical Field
The utility model belongs to the technical field of the metallurgy, concretely relates to novel energy-conserving ladle of wall heating toasts device.
Background
In the early 2000 years, the national requirements on environmental protection are not strict, and the fuel cost is low because the hot dirty producer gas is adopted as the fuel in the factories without the additional product gas such as blast furnaces. With the development of industrial technology in China, the national requirements on environmental protection are more and more strict, the heat and dirt removing producer gas is gradually taken, clean energy source natural gas is required to be used, the cost of the natural gas is high, energy conservation and consumption reduction become urgent tasks of various enterprises, and the pure oxygen combustion has the advantages of saving cost, prolonging the service life of a steel ladle, reducing emission and the like. The pure oxygen burner is installed on the top of a ladle cover in the traditional pure oxygen combustion technology, along with the development of production technology, the capacity of a ladle gradually develops from 20-50 tons to large-scale development, the typical steel ladle in a steel mill at present contains about 80-150 tons, the inner diameter of the ladle is more than 2 meters, the clearance height is more than 3 meters, and the ladle is of a hollow structure. A conventional 150 ton ladle pure oxygen roaster is shown in fig. 4. The characteristics of the ladle require that the bottom refractory material is thicker than the refractory material of the ladle wall, generally the bottom refractory material is about 450mm thick, and the refractory material of the ladle wall is about 270mm thick. Therefore, the baking time of the refractory material at the bottom of the ladle is longer than that of the side wall of the ladle. Newly build ladle and overhaul ladle and do not allow sharp intensification, the combustor is in under the small load condition, and flame length is shorter than under the rated load a lot, and traditional toasting mode is that the combustor is installed on the ladle cover, and the ladle height is more than 3 meters, and the flame of combustor can not the direct heating ladle bottom, can only slowly toast the ladle bottom through heat transfer, leads to toasting the time overlength, fuel consumption greatly increased to cause other to toast the ladle and seriously extrude, seriously influence the work efficiency of whole production line.
SUMMERY OF THE UTILITY MODEL
In order to overcome the technical problem, the utility model provides a novel energy-conserving ladle baking equipment of wall heating can realize reducing the target of energy consumption by a wide margin in the ladle toasts.
In order to achieve the above object, the present invention is achieved by the following technical solutions.
A novel energy-saving ladle baking device for wall surface heating comprises a ladle cover and a bottom burner; the ladle cover consists of a cover plate and a cylindrical inner cavity, the outer edge of the cover plate completely covers the upper opening of the ladle, a hole is formed in the cover plate, the inner cavity is of a closed cavity structure with an opening at the upper end, the upper end of the inner cavity is hermetically fixed on the lower side of the cover plate, and the opening of the cover plate is positioned at the upper part of the inner cavity; the bottom burner is arranged at the bottom end of the inner cavity, a nozzle of the bottom burner penetrates through the opening of the inner cavity and is arranged outside the bottom end of the inner cavity, and the fuel channel and the combustion improver channel extend into the inner cavity from the opening of the cover plate and are connected with the bottom burner; and a fire-resistant layer is arranged on the surface of the ladle cover. The distance between the bottom burner and the bottom of the ladle is greatly shortened by utilizing the characteristic that the inner cavity extends into the ladle, the flame can be directly heated to the bottom of the ladle even if small-load short flame is used, and the heat can upwards heat the wall surface of the ladle through thermal circulation; and the inner chamber itself has certain volume, can occupy the partial volume of ladle, and ladle wall shortens with the inner chamber outer wall distance, and the heat of ignition back inner chamber outer wall passes through thermal radiation heating ladle wall for ladle lateral wall rate of rise of temperature improves. In order to prevent the fuel channel and the combustion improver channel in the inner cavity from generating safety threat after the heat in the ladle rises, a fire-resistant layer is fixedly arranged on the surface of the ladle cover to protect the inner cavity. According to the length of the inner cavity, the whole ladle cover adopts a vertical lifting structure or a side-turning structure.
Further the height of the inner cavity is greater than or equal to 1/6 of the inner depth of the matched ladle.
Furthermore, the inner cavity is a cavity structure and is cylindrical or truncated cone-shaped, and the diameter of the inner cavity is larger than or equal to 1/6 of the inner diameter of the matched ladle. Is convenient for processing and manufacturing, and is beneficial to the arrangement of the fuel channel and the combustion improver channel.
Furthermore, 6-18 sets of side burners are arranged on the side face of the inner cavity, and the side burners are arranged at an angle of 0-10 degrees; the side fuel channel and the side fire retardant channel extend into the inner cavity from the opening of the cover plate and are respectively connected with the side fuel nozzle and the side combustion improver nozzle. Only a downward bottom burner is arranged in the inner cavity, flame points to the bottom of the ladle, the heating of the side wall of the ladle is completed only by the transmission of heat in the ladle, the temperature rise time is long, and the fuel consumption is high. A plurality of side burners are symmetrically arranged on the side surface of the inner cavity, flame is sprayed out horizontally or downwards at an angle of 10 degrees, the side wall of the ladle is directly heated, and meanwhile, the vertical convection of the heat generated by the bottom burner and generated in the whole ladle is cut off, so that the vertical convection ring of the heat generated by the bottom burner is reduced, and the temperature rise of the bottom of the ladle is promoted; the lateral burner generates upper and lower layers of horizontal heat convection loops to finish baking the lateral wall. The bottom burner and the side burner can be synchronously started or the bottom burner can be started to heat for a period of time before the side burner is started.
Further the burner is a concentrated single flow or a dispersed multi-flow flame burner. Preferably, natural gas and pure oxygen combustion technology is used, and the method has the advantages of less pollutant emission, high heat value, low cost and prolonged service life of the ladle.
Further, an electronic lighter and a flame monitor are arranged in the bottom burner. Automatic ignition and flame monitoring, and safety and reliability of use are ensured.
Furthermore, the edge of the cover plate is provided with a smoke notch.
Has the advantages that: compared with the prior art, the utility model has the advantages of:
1) the characteristic that the inner cavity extends into the bottom of the ladle is utilized, the distance between flame and the bottom of the ladle is shortened, the refractory material at the bottom of the ladle is directly baked, the wall surface of the ladle is heated by the outer wall of the inner cavity through thermal radiation, the baking time is shortened, and fuel is saved;
2) the newly built steel ladle or the overhaul steel ladle is gradually heated by adopting small-load short flame, the flame can directly reach the bottom and the side wall of the ladle, and the baking time is shortened;
3) after the temperature of the ladle bottom rises, the side surface burner is adopted to directly bake the side wall of the ladle in a short distance, so that the side wall is directly heated, the baking time is further shortened, and the fuel is saved;
4) compared with the traditional top-mounted burner baking mode, the fuel consumption is reduced by 30-50%, the baking time is shortened by 20-30%, and the NOx emission is greatly reduced.
Drawings
FIG. 1 is a schematic cross-sectional view showing a ladle baking apparatus according to embodiment 1;
FIG. 2 is a schematic cross-sectional view showing the ladle baking apparatus of example 2;
FIG. 3 is a schematic cross-sectional view showing the ladle baking apparatus of example 3;
FIG. 4 is a schematic cross-sectional view showing the ladle baking apparatus of example 4;
FIG. 5 is a schematic cross-sectional view showing the ladle baking apparatus of example 6;
FIG. 6 is a schematic cross-sectional view showing a ladle baking apparatus according to embodiment 6;
FIG. 7 is a schematic sectional view of a conventional ladle baking apparatus;
the fuel combustion-supporting structure comprises a cover plate 11, an inner cavity 12, an inner cavity 13, a ladle, 14, a flame retardant layer, 15, a notch, 2, a bottom burner, 21, a fuel nozzle, 22, a combustion-supporting agent nozzle, 23, an ignition burner, 24, a fuel channel, 25, a combustion-supporting agent channel, 3, a side burner, 31, a side fuel nozzle, 32, a side combustion-supporting agent nozzle, 33, a side fuel channel and 34, a side combustion-supporting agent channel.
Detailed Description
The present invention will be described in further detail with reference to examples. The raw materials used by the utility model are commercially available products.
Example 1
As shown in figure 1, the novel energy-saving ladle baking device for heating the wall surface comprises a ladle cover and a bottom burner 2. The ladle cover consists of a cover plate 11 and an inner cavity 12, the outer edge of the cover plate 11 completely covers the upper opening of the ladle 13, the cover plate 11 is provided with a hole, the inner cavity 12 is a closed cavity structure with an opening at the upper end, the upper end of the inner cavity 12 is hermetically fixed at the lower side of the cover plate 11, and the hole of the cover plate 11 is positioned at the upper part of the inner cavity; the height of the inner cavity 12 is equal to 1/6 of the inner depth of the mating ladle 13, the inner cavity 12 is cylindrical, and the diameter of the inner cavity 12 is equal to 1/6 of the inner diameter of the mating ladle 13. The bottom combustor 2 is located the inner chamber 12 bottom, and the bottom combustor 2 is single current flame combustor, and fuel passageway 24 and fire retardant passageway 25 get into inner chamber 12 by the 11 trompils of apron and are connected with bottom combustor 2, are equipped with electronic sparker and flame monitor in the bottom combustor 2. The surface of the ladle cover is provided with a fire-resistant layer 14. The edge of the cover plate 11 is provided with a smoke notch 15. The fuel is preferably natural gas and the flame retardant is preferably pure oxygen.
Example 2
As shown in fig. 2, substantially the same as in example 1, except that the height of the inner cavity 12 is equal to 1/3 of the inner depth of the mating ladle 13, the diameter of the inner cavity 12 is equal to 1/3 of the inner diameter of the mating ladle 13, and a plurality of bottom burners 2 are arranged at the bottom of the inner cavity.
Example 3
As shown in fig. 3, basically the same as the embodiment 2, except that the height of the inner cavity 12 is equal to 2/3 of the inner depth of the mating ladle 13, the diameter of the inner cavity 12 is equal to 2/3 of the inner diameter of the mating ladle 13, 18 sets of side burners 3 are provided at the side of the inner cavity 12, the side burners 3 are arranged at 10 °, the side burners 3 are single-flow flame burners, and the side fuel passages 33 and the side oxidizer passages 34 are opened from the cover plate 11 into the inner cavity 12 to be connected with the side burners 3.
Example 4
As shown in fig. 4, a novel energy-saving ladle baking device for wall heating comprises a ladle cover and a bottom burner 2. The ladle cover consists of a cover plate 11 and an inner cavity 12, the outer edge of the cover plate 11 completely covers the upper opening of the ladle 13, the cover plate 11 is provided with a hole, the inner cavity 12 is a closed cavity structure with an opening at the upper end, the upper end of the inner cavity 12 is hermetically fixed at the lower side of the cover plate 11, and the hole of the cover plate 11 is positioned at the upper part of the inner cavity; the height of the inner cavity 12 is equal to 1/3 of the inner depth of the matched ladle 13, the inner cavity 12 is of a cavity structure and is in a circular truncated cone shape, and the diameter of the inner cavity 12 is larger than or equal to 1/3 of the inner diameter of the matched ladle 13. The bottom burner 2 is positioned at the bottom end of the inner cavity 12, and the bottom burner 2 is a dispersed multi-flow flame burner. The bottom burner 2 comprises a fuel nozzle 21, a combustion improver nozzle 22 and an ignition burner 23, the fuel nozzle 21 and the combustion improver nozzle 22 are annularly and alternately distributed around the ignition burner 23, and a fuel channel 24 and a combustion improver channel 25 enter the inner cavity 12 from the opening of the cover plate 11 and are respectively connected with the fuel nozzle 21 and the combustion improver nozzle 22. An electronic lighter and a flame monitor are arranged in the ignition burner 23. The surface of the ladle cover is provided with a fire-resistant layer 14. The edge of the cover plate 11 is provided with a smoke notch 15.
Example 5
As shown in fig. 5, substantially the same as in example 4, except that the height of the inner cavity 12 is equal to 2/3 of the inner depth of the mating ladle 13, the diameter of the inner cavity 12 is equal to 2/3 of the inner diameter of the mating ladle 13, 12 sets of side burners 3 are provided at the side of the inner cavity 12, the side burners 3 are arranged at 10 ° downward from the horizontal, and the side burners 3 are divergent multi-flow flame burners. The side burner 3 is composed of a plurality of side fuel nozzles 31 and side combustion improver nozzles 32 which are alternately arranged in a ring shape, and a side fuel channel 33 and a side combustion improver channel 34 enter the inner cavity 12 from the opening of the cover plate 11 and are respectively connected with the side fuel nozzles 31 and the side combustion improver nozzles 32.
Example 6
As shown in fig. 6, substantially the same as in example 5, except that the height of the inner cavity 12 is equal to 3/4 of the inner depth of the mating ladle 13, the diameter of the inner cavity 12 is equal to 3/4 of the inner diameter of the mating ladle 13, 6 sets of side burners 3 are provided at the side of the inner cavity 12, and the side burners 3 are horizontally arranged.
The present invention has been described in terms of the above embodiments, it should be understood that the above embodiments are not limited in any way, and all technical solutions obtained by adopting equivalent replacement or equivalent transformation modes fall within the protection scope of the present invention.
Claims (7)
1. A novel energy-saving ladle baking device for wall surface heating is characterized by comprising a ladle cover and a bottom burner; the ladle cover consists of a cover plate and a cylindrical inner cavity, the outer edge of the cover plate completely covers the upper opening of the ladle, a hole is formed in the cover plate, the inner cavity is of a closed cavity structure with an opening at the upper end, the upper end of the inner cavity is hermetically fixed on the lower side of the cover plate, and the opening of the cover plate is positioned at the upper part of the inner cavity; the bottom burner is arranged at the bottom end of the inner cavity, a nozzle of the bottom burner penetrates through the opening of the inner cavity and is arranged outside the bottom end of the inner cavity, and the fuel channel and the combustion improver channel extend into the inner cavity from the opening of the cover plate and are connected with the bottom burner; and a fire-resistant layer is arranged on the surface of the ladle cover.
2. The novel energy-saving ladle baking device for wall heating as claimed in claim 1, wherein the height of the inner cavity is greater than or equal to 1/6 of the inner depth of the matched ladle.
3. The novel energy-saving ladle baking device for wall heating as claimed in claim 1, wherein the inner cavity is cylindrical or truncated cone-shaped, and the diameter of the inner cavity is greater than or equal to 1/6 of the inner diameter of the matched ladle.
4. The novel energy-saving ladle baking device for wall surface heating according to claim 1, wherein 6-18 sets of side surface burners are arranged on the side surface of the inner cavity; the side fuel channel and the side fire retardant channel extend into the inner cavity from the opening of the cover plate and are respectively connected with the side fuel nozzle and the side combustion improver nozzle.
5. The novel energy-saving ladle baking device for wall surface heating according to any one of claims 1 to 4, wherein the burner is a concentrated single-flow or dispersed multi-flow flame burner.
6. The wall-heating novel energy-saving ladle baking device as claimed in claim 1, wherein an electronic lighter and a flame monitor are arranged in the bottom burner.
7. The novel energy-saving ladle baking device for wall heating as claimed in claim 1, wherein the edge of the cover plate is provided with a flue gas notch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020992914.1U CN212857738U (en) | 2020-06-03 | 2020-06-03 | Novel energy-conserving ladle of wall heating toasts device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020992914.1U CN212857738U (en) | 2020-06-03 | 2020-06-03 | Novel energy-conserving ladle of wall heating toasts device |
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| CN212857738U true CN212857738U (en) | 2021-04-02 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114951623A (en) * | 2022-06-28 | 2022-08-30 | 东北大学 | Pure oxygen combustion-supporting premixing ladle baking device and method |
| CN114985716A (en) * | 2022-06-28 | 2022-09-02 | 东北大学 | Pure oxygen combustion type ladle baking device and method for recycling flue gas waste heat |
-
2020
- 2020-06-03 CN CN202020992914.1U patent/CN212857738U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114951623A (en) * | 2022-06-28 | 2022-08-30 | 东北大学 | Pure oxygen combustion-supporting premixing ladle baking device and method |
| CN114985716A (en) * | 2022-06-28 | 2022-09-02 | 东北大学 | Pure oxygen combustion type ladle baking device and method for recycling flue gas waste heat |
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