CN212686668U - Continuous scrap steel conveying device with preheating section having sealing function - Google Patents
Continuous scrap steel conveying device with preheating section having sealing function Download PDFInfo
- Publication number
- CN212686668U CN212686668U CN202020486633.9U CN202020486633U CN212686668U CN 212686668 U CN212686668 U CN 212686668U CN 202020486633 U CN202020486633 U CN 202020486633U CN 212686668 U CN212686668 U CN 212686668U
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- Prior art keywords
- temperature
- smoke hood
- sealing
- hood
- preheating section
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- 238000007789 sealing Methods 0.000 title claims abstract description 71
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 32
- 239000010959 steel Substances 0.000 title claims abstract description 32
- 239000000779 smoke Substances 0.000 claims abstract description 91
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 20
- 239000003546 flue gas Substances 0.000 claims description 20
- 238000001816 cooling Methods 0.000 claims description 5
- 239000011819 refractory material Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 2
- 239000002699 waste material Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 230000005855 radiation Effects 0.000 description 7
- 239000002918 waste heat Substances 0.000 description 7
- 230000008602 contraction Effects 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Furnace Details (AREA)
Abstract
The utility model discloses a scrap steel continuous conveyor that preheating section has sealing function, including vibration silo, high temperature petticoat pipe, petticoat pipe frame etc. the high temperature petticoat pipe is located preheating section vibration silo upper portion and with the petticoat pipe frameThe frame is connected with the upper beam, horizontal side plates are arranged at the lower parts of two sides of the high-temperature smoke hood, a sealing groove is arranged at the lower part of each horizontal side plate, an outer side plate and an end plate of each sealing groove are connected with the horizontal side plates of the high-temperature smoke hood, and a gap is reserved between the inner side plate of each sealing groove and the horizontal side plate of the high-temperature; the upper parts of the two sides of the vibrating trough extend outwards to form an upper flat plate and a side vertical plate. According to the utility model discloses preheating section has continuous conveyor of steel scrap of sealed function, can effectively reduce 80% -90% air leakage condition, can improve the steel scrap preheating temperature 200 ℃ -300 ℃, energy-conserving 32-38 kilowatt-hours/ton at least, reduces the circulation water consumption 600m moreover3H, and simultaneously reduces power consumption.
Description
Technical Field
The utility model relates to a continuous scrap steel conveying device for steelmaking, in particular to electric furnace steelmaking, belonging to the field of energy conservation and environmental protection.
Background
The production of industrial furnaces (including electric furnaces and converters) can generate a large amount of high-temperature flue gas containing dust, the dust content in the flue gas is about 8-15g/m3, the temperature of the flue gas reaches 1100-1200 ℃, the high-quality waste heat is lost when the flue gas is directly discharged, and the requirement of environmental protection cannot be met.
The high-temperature flue gas at 1100-1200 ℃ contains a large amount of high-quality waste heat, and in order to fully utilize the waste heat of the high-temperature flue gas of the electric furnace, a waste steel continuous feeding preheating device, namely a preheating section of a waste steel continuous conveying device, is configured for the Consteel electric furnace which takes waste steel as a raw material. In the preheating section, the high-temperature flue gas and the waste steel are subjected to heat exchange, so that the temperature of the flue gas is reduced to 700-800 ℃, the waste steel is heated to 400-500 ℃, the waste heat is recovered, and the utilization effect of the waste heat is improved.
Because the vibrating trough is in a vibration conveying state, the sealing between the vibrating trough and the high-temperature smoke hood is poor, the air leakage is serious, and the temperature of high-temperature smoke is seriously reduced. And in the preheating section, the high-temperature flue gas and the scrap steel mainly exchange heat in a radiation heat exchange mode, the radiation capacity of the high-temperature flue gas is in direct proportion to the fourth power of the temperature, and obviously, the radiation heat exchange effect on the scrap steel is seriously weakened by the reduction of the temperature of the high-temperature flue gas caused by air leakage. In the actual use process, due to air leakage, the temperature of high-temperature flue gas is only 800-500 ℃, the waste steel can only be heated to 200-300 ℃, the waste heat utilization effect is poor, and the increase of the preheating temperature of the waste steel is influenced. In addition, along the direction of air flow, the air leakage at the end part of the high-temperature smoke hood is very serious, and a large amount of air leakage also seriously reduces the temperature of the flue gas entering the waste heat boiler, thereby influencing the steam production of the boiler. The high-temperature smoke hood generally adopts a water cooling mode, so that the temperature of the inner wall of the high-temperature smoke hood is reduced, and the radiation capacity of the inner wall is greatly reduced. Meanwhile, high-temperature flue gas flows along the upper surface of the scrap steel, the heat convection effect is not obvious, and the heat convection proportion is small.
Therefore, the air leakage of the preheating section is reduced, the temperature of the inner wall of the high-temperature smoke hood is improved, the convection heat exchange proportion is increased, and the preheating temperature of the scrap steel can be improved. Meanwhile, the cooling water quantity of the high-temperature smoke hood can be saved, and the power consumption is reduced.
SUMMERY OF THE UTILITY MODEL
The invention aims at a Consteel electric furnace, mainly solves the problem of air leakage at the preheating section of a scrap steel continuous feeding device, and improves the preheating temperature of scrap steel.
The technical scheme of the invention is as follows:
a scrap steel continuous conveying device with a sealing function at a preheating section comprises a vibrating trough, a supporting frame, a vibrating unit, a high-temperature smoke hood, a smoke hood frame and the like, wherein the high-temperature smoke hood is positioned at the upper part of the vibrating trough at the preheating section and is connected with an upper beam of the smoke hood frame; horizontal side plates are arranged at the lower parts of two sides of the high-temperature smoke hood, a sealing groove is arranged at the lower part of each horizontal side plate, each sealing groove is composed of an outer side plate, an inner side plate, a bottom plate and an end plate, the outer side plate and the end plate of each sealing groove are connected with the horizontal side plates of the high-temperature smoke hood, and a gap is reserved between the inner side plate of each sealing groove and the horizontal; the upper parts of the two sides of the vibrating trough extend outwards to form an upper flat plate and a side vertical plate; the upper flat plate is positioned at the lower part of the horizontal side plate of the high-temperature smoke hood and the upper part of the inner side plate of the sealing groove; the side vertical plate is positioned in the sealing groove.
The high-temperature smoke hood is arranged on the upper beam of the smoke hood frame.
Preferably, the upper beam of the smoke hood frame is higher than the top of the high-temperature smoke hood, and the high-temperature smoke hood is connected with the upper beam of the smoke hood frame in a welding mode or the high-temperature smoke hood is hung on the upper beam of the smoke hood frame.
And the outer side plate and the end plate of the sealing groove are welded with the horizontal side plate of the high-temperature smoke hood.
Preferably, the outer side plate of the sealing groove is connected with the horizontal side plate of the high-temperature smoke hood, the bottom plate of the sealing groove and the end plate through flanges.
The sealing groove seat is arranged on the lower beam of the smoke hood frame; baffles are arranged on the horizontal side plate of the high-temperature smoke hood and the upper flat plate of the vibrating trough at intervals up and down; flexible high-temperature-resistant cellucotton is filled between baffles of the upper flat plate of the vibrating trough; water is filled in the sealing groove, and the sealing groove is provided with a water inlet and a water outlet; the side vertical plate is provided with a dust baffle plate and a water baffle plate.
Along the flowing direction of the flue gas, the tail part of the high-temperature smoke hood comprises a connecting hood, a sealing body and the like; the connecting cover is provided with a smoke port; at least one group of sealing bodies are arranged at the end part of the connecting cover.
Or along the flowing direction of the flue gas, the tail part of the high-temperature smoke hood comprises an exhaust hood, a connecting hood, a sealing body and the like; the air draft cover is positioned between the two connecting covers to jointly form a tail structure of the high-temperature smoke hood, the air draft cover is provided with an air draft opening, and the connecting cover on the reverse airflow side of the air draft cover is provided with a smoke port; the end part of the tail connecting cover is provided with a sealing body.
Preferably, a sealing body is arranged in each of the two connecting covers.
The sealing body consists of a sealing element and a shaft; the sealing element is composed of a plurality of rigid bodies with holes at one ends, the rigid bodies are of fan-shaped structures, and the rigid bodies are sleeved on the shaft; the shaft is fixed to the connecting cover.
The high temperature petticoat pipe is non-water-cooling petticoat pipe, and the inboard of high temperature petticoat pipe comprises polylith design refractory material.
The high-temperature smoke hood before the tail part of the high-temperature smoke hood has at least one section contraction along the smoke flowing direction.
Preferably, the high temperature hood before the tail of the high temperature hood has at least one reduction in section height.
Preferably, the distance between the inner side of the top of the high-temperature smoke hood and the upper surface of the scrap steel is 0.1-2 m.
The sealing groove is arranged, so that air leakage between the vibrating trough and the high-temperature hood is reduced; the sealing body is arranged in the high-temperature smoke hood tail connecting cover, so that air leakage at the tail of the high-temperature smoke hood is reduced. The air leakage is reduced, the temperature of the flue gas is improved, and the radiation heat exchange effect of the flue gas is greatly improved. The high temperature petticoat pipe adopts non-water-cooling petticoat pipe, has improved the temperature of high temperature petticoat pipe inner wall, and the radiation ability of inner wall has also improved, practices thrift the cooling water yield of high temperature petticoat pipe simultaneously, reduces the heat and the power consumption of taking away. The high-temperature smoke hood before the tail of the high-temperature smoke hood has at least one section contraction, so that the heat convection effect between high-temperature smoke and waste steel is enhanced. The improvement of the structures increases the preheating temperature of the scrap steel in the preheating section. In the preheating section, the energy can be saved by 16-19kwh/t when the temperature of the scrap steel is increased by 100 ℃, and the energy-saving effect is obvious.
The invention has the beneficial effects that:
1. the air leakage is reduced by 80-90%.
2. At least raising the preheating temperature of the scrap steel by 200-300 ℃, and saving energy by 32-38 kilowatt-hours/ton.
3. Reduce the circulating water consumption by 600m3H, and simultaneously reduces power consumption.
Drawings
FIG. 1 is a schematic elevation view of embodiment 1;
FIG. 2 is a schematic sectional view taken along line A-A of FIG. 1;
FIG. 3 is a schematic cross-sectional view of a seal slot;
FIG. 4 is a schematic elevation view of embodiment 2;
fig. 5 is a schematic sectional view taken along line B-B in fig. 4.
Reference numerals
1. An electric furnace;
2. a scrap steel continuous conveying device; 2.1, a preheating section of the scrap steel continuous conveying device; 2.2, a feeding section of the continuous scrap steel conveying device;
3. a trough; 3.1, an upper flat plate; 3.2, a side vertical plate;
4. a support frame;
5. a high temperature hood; 5.1, the tail part of the high-temperature smoke hood; 5.2, horizontal side plates of the high-temperature smoke hood; 5.3, lining;
6. a hood frame; 6.1, a smoke hood frame upper beam; 6.2, a lower beam of the smoke hood frame;
7. a vibration unit;
8. scrap steel;
9. a sealing groove; 9.1, an outer panel; 9.2, inner side plates; 9.3, a bottom plate; 9.4, end plates;
10. a connecting cover; 10.1, a smoke port;
11. an air draft cover; 11.1, an air suction opening;
12. high-temperature cellucotton;
13. a seal body; 13.1, sealing elements; 13.2, a shaft;
14. and a baffle plate.
Detailed Description
The embodiments of the present invention will be described with reference to the accompanying drawings.
Example 1 is shown in FIGS. 1 to 3.
A scrap steel continuous conveying device 2 with a preheating section having a sealing function is composed of a preheating section 2.1 and a feeding section 2.2 and comprises a vibrating trough 3, a support frame 4, a vibrating unit 7, a high-temperature smoke hood 5, a smoke hood frame 6 and the like, wherein an upper beam 6.1 of the smoke hood frame is higher than the top of the high-temperature smoke hood, and the high-temperature smoke hood 5 is positioned at the upper part of the preheating section vibrating trough 3 and is hung on the upper beam 6.1 of the smoke hood frame; horizontal side plates 5.2 are arranged at the lower parts of two sides of the high-temperature smoke hood, a sealing groove 9 is arranged at the lower part of the horizontal side plate 5.2, the sealing groove 9 is composed of an outer side plate 9.1, an inner side plate 9.2, a bottom plate 9.3 and an end plate 9.4, the outer side plate 9.1 and the end plate 9.4 of the sealing groove are welded with the horizontal side plate 5.2 of the high-temperature smoke hood, and a gap is reserved between the inner side plate 9.2 of the sealing groove and the horizontal side plate 5.; the upper parts of two sides of the vibrating trough 3 extend outwards to form an upper flat plate 3.1 and a side vertical plate 3.2; the upper flat plate 3.1 is positioned at the lower part of the horizontal side plate 5.2 of the high-temperature smoke hood and at the upper part of the inner side plate 9.2 of the sealing groove; the side standing plate 3.2 is located in the sealing groove 9. The sealing groove 9 is arranged on the lower beam 6.2 of the smoke hood; the baffle plates 14 are arranged on the horizontal side plate 5.2 of the high-temperature smoke hood and the upper flat plate 3.1 of the vibrating trough at intervals up and down; flexible high-temperature-resistant cellucotton 12 is filled between baffles of the upper flat plate 3.1 of the vibrating trough; the seal groove contains water and is provided with a water inlet and a water outlet (not shown).
Along the flowing direction of the smoke, the tail part 5.1 of the high-temperature smoke hood comprises connecting covers 10, an air draft cover 11, a sealing body 13 and the like, wherein the air draft cover 11 is positioned between the two connecting covers 10 to jointly form a structure of the tail part 5.1 of the high-temperature smoke hood, the air draft cover 11 is provided with an air draft opening 11.1, and the connecting cover 10 on the reverse airflow side of the air draft cover is provided with a smoke opening 10.1; a seal body 13 is provided in the end connection cover 10.
The sealing body 13 is composed of a sealing part 13.1 and a shaft 13.2; the sealing element 13.1 is composed of a plurality of rigid bodies with holes at one ends, the rigid bodies are of fan-shaped structures, and the plurality of rigid bodies are sleeved on the shaft 13.2; the shaft 13.2 is fixed to the connecting hood 10.
The high temperature petticoat pipe 5 adopts non-water cooling petticoat pipe, and the inside lining 5.3 of high temperature petticoat pipe 5 comprises polylith design refractory material. Therefore, the temperature of the inner wall of the high-temperature smoke hood can be improved, the radiation capacity of the inner wall can be improved, the cooling water quantity of the high-temperature smoke hood can be saved, and the heat and power consumption brought away can be reduced.
Along the flue gas flow direction, the high-temperature smoke hood 5 before the tail part 5.1 of the high-temperature smoke hood has at least one section height reduction, the section contraction path is 4m, and the distance between the inner side of the top of the high-temperature smoke hood 5 and the upper surface of the scrap steel 8 is 1 m.
Example 2, as shown in fig. 3-5.
Example 2 differs from example 1 as follows:
1. sealing bodies 13 are arranged in both connecting covers 10.
2. The high-temperature hood is arranged on the upper beam of the hood frame.
The rest of the description is the same as that of embodiment 1, and can be read from the description of embodiment 1.
In addition, it should be noted that: the above-described embodiments are examples of the present invention, and one of the functions thereof is to explain the present invention and should not be construed as limiting the present invention in any way.
Claims (10)
1. The utility model provides a preheating section has scrap steel continuous conveyor of sealed function, includes vibration silo, support frame, vibration unit, high temperature petticoat pipe, petticoat pipe frame etc. its characterized in that:
the high-temperature hood is positioned at the upper part of the preheating section vibrating trough and is connected with the upper beam of the hood frame;
horizontal side plates are arranged at the lower parts of two sides of the high-temperature smoke hood, a sealing groove is arranged at the lower part of each horizontal side plate and consists of an outer side plate, an inner side plate, a bottom plate and an end plate, the outer side plate and the end plate of the sealing groove are connected with the horizontal side plates of the high-temperature smoke hood, and a gap is reserved between the inner side plate of the sealing groove and the horizontal side plates of the high;
the upper parts of the two sides of the vibrating trough extend outwards to form an upper flat plate and a side vertical plate; the upper flat plate is positioned at the lower part of the horizontal side plate of the high-temperature smoke hood and the upper part of the inner side plate of the sealing groove; the side vertical plate is positioned in the sealing groove.
2. The continuous scrap conveyor with sealing function in the preheating section according to claim 1, wherein: the upper beam of the smoke hood frame is higher than the top of the high-temperature smoke hood, and the high-temperature smoke hood is connected with the upper beam of the smoke hood frame in a welding mode or the high-temperature smoke hood is hung on the upper beam of the smoke hood frame.
3. The continuous scrap conveyor with sealing function in the preheating section according to claim 1, wherein: the high-temperature hood is arranged on the upper beam of the hood frame.
4. The continuous scrap conveyor with sealing function in the preheating section according to claim 1, wherein: and the outer side plate and the end plate of the sealing groove are welded with the horizontal side plate of the high-temperature smoke hood.
5. The continuous scrap conveyor with sealing function in the preheating section according to claim 1, wherein: the outer side plate of the sealing groove is connected with the horizontal side plate of the high-temperature smoke hood, the bottom plate of the sealing groove and the end plate flange.
6. The continuous scrap conveyor with sealing function in the preheating section according to claim 1, wherein: the sealing groove seat is arranged on the lower beam of the smoke hood frame; baffles are arranged on the horizontal side plate of the high-temperature smoke hood and the upper flat plate of the vibrating trough at intervals up and down; flexible high-temperature-resistant cellucotton is filled between baffles of the upper flat plate of the vibrating trough; the sealing groove is filled with water and is provided with a water inlet and a water outlet.
7. The continuous scrap conveyor with sealing function in the preheating section according to claim 1, wherein: along the flowing direction of the flue gas, the tail part of the high-temperature smoke hood comprises a connecting hood, a sealing body and the like; the connecting cover is provided with a smoke port; at least one group of sealing bodies are arranged at the end part of the connecting cover.
8. The continuous scrap conveyor with sealing function in the preheating section according to claim 1, wherein: along the flowing direction of the smoke, the tail part of the high-temperature smoke hood comprises an air draft cover, a connecting cover, a sealing body and the like; the air draft cover is positioned between the two connecting covers to jointly form a tail structure of the high-temperature smoke hood, the air draft cover is provided with an air draft opening, and the connecting cover on the reverse airflow side of the air draft cover is provided with a smoke port; sealing bodies are arranged at the end parts of the tail connecting covers or in the two connecting covers.
9. The continuous scrap conveyor with sealing function in the preheating section according to claim 7 or 8, wherein: the sealing body consists of a sealing element and a shaft; the sealing element is composed of a plurality of rigid bodies with holes at one ends, the rigid bodies are of fan-shaped structures, and the rigid bodies are sleeved on the shaft; the shaft is fixed to the connecting cover.
10. The continuous scrap conveyor with sealing function in the preheating section according to claim 1, wherein: the high-temperature smoke hood before the tail part of the high-temperature smoke hood has at least one time of section height reduction; the high-temperature smoke hood is a non-water-cooling smoke hood, and the inner side of the high-temperature smoke hood is made of a plurality of shaped refractory materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020486633.9U CN212686668U (en) | 2020-04-03 | 2020-04-03 | Continuous scrap steel conveying device with preheating section having sealing function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020486633.9U CN212686668U (en) | 2020-04-03 | 2020-04-03 | Continuous scrap steel conveying device with preheating section having sealing function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212686668U true CN212686668U (en) | 2021-03-12 |
Family
ID=74892736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020486633.9U Expired - Fee Related CN212686668U (en) | 2020-04-03 | 2020-04-03 | Continuous scrap steel conveying device with preheating section having sealing function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212686668U (en) |
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2020
- 2020-04-03 CN CN202020486633.9U patent/CN212686668U/en not_active Expired - Fee Related
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210312 |
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| CF01 | Termination of patent right due to non-payment of annual fee |