CN220149622U - System for realizing rapid heating of strip steel - Google Patents
System for realizing rapid heating of strip steel Download PDFInfo
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- CN220149622U CN220149622U CN202320293836.XU CN202320293836U CN220149622U CN 220149622 U CN220149622 U CN 220149622U CN 202320293836 U CN202320293836 U CN 202320293836U CN 220149622 U CN220149622 U CN 220149622U
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 65
- 239000010959 steel Substances 0.000 title claims abstract description 65
- 238000010438 heat treatment Methods 0.000 title claims abstract description 59
- 239000007789 gas Substances 0.000 claims description 87
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 239000002737 fuel gas Substances 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 abstract description 8
- 238000000137 annealing Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000005855 radiation Effects 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 230000002708 enhancing effect Effects 0.000 description 3
- 238000007747 plating Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- FJMNNXLGOUYVHO-UHFFFAOYSA-N aluminum zinc Chemical compound [Al].[Zn] FJMNNXLGOUYVHO-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Abstract
The utility model discloses a system for realizing rapid heating of strip steel, which relates to the technical field of industrial kilns, and has the technical scheme that: comprises a furnace lining, a high-temperature fan and a plurality of gas pipelines which are oppositely arranged; jet bellows are oppositely arranged between the furnace linings which are oppositely arranged, jet nozzles and heating devices are arranged on adjacent surfaces of the jet bellows which are oppositely arranged, and circulating gas inlets are arranged on deviating surfaces of the jet bellows which are oppositely arranged; a circulating gas outlet is arranged on the furnace lining; the high-temperature fan is connected with the circulating gas inlet and the circulating gas outlet through a gas pipeline. The system improves the convection heat exchange coefficient between the strip steel and the protective gas in the furnace, strengthens the heating rate of the strip steel in the strip steel continuous annealing unit, reduces the size of the furnace and improves the production efficiency of the furnace.
Description
Technical Field
The utility model relates to the technical field of industrial furnaces, in particular to a system for realizing rapid heating of strip steel.
Background
In a strip steel continuous annealing unit and a strip steel continuous hot dip plating (zinc plating, aluminum zinc plating and the like) unit, the heating temperature of the strip steel mainly depends on the modes of radiant tube heating, flame direct injection heating, open flame heating and the like. The machine set for producing the household appliance plate and the automobile plate strip steel has strict requirements on the surface quality of the strip steel, and the radiation pipe heating mode is mostly adopted in consideration of filling the annealing furnace with the protective gas, and jet impact preheating (heating the strip steel to about 300 ℃) can be carried out by combining the protective gas. In a radiant tube heating furnace, heat is exchanged between the strip steel and the radiant tube through heat radiation, and the emissivity of the strip steel is low (the emissivity of a stainless steel bright plate is generally less than 0.1 and the emissivity of plain carbon steel is generally not higher than 0.2), so that the space in the furnace required by heating the strip steel is large, and the heating efficiency is low.
Disclosure of Invention
The utility model aims to provide a system for realizing rapid heating of strip steel, which improves the convection heat exchange coefficient between the strip steel and protective gas in a furnace, improves the heating rate of strip steel in a strip steel continuous annealing unit, improves the production efficiency of a furnace kiln and the unit, and can reduce the size of the strip steel continuous annealing furnace.
The technical aim of the utility model is realized by the following technical scheme: a system for realizing rapid heating of strip steel comprises a furnace lining, a high-temperature fan and a plurality of gas pipelines which are oppositely arranged; jet flow bellows are oppositely arranged between the furnace linings which are oppositely arranged, jet flow nozzles and heating devices are arranged on adjacent surfaces of the jet flow bellows which are oppositely arranged, and circulating gas inlets are arranged on deviating surfaces of the jet flow bellows which are oppositely arranged; the furnace lining is provided with a circulating gas outlet; the high-temperature fan is connected with the circulating gas inlet and the circulating gas outlet through a gas pipeline.
The utility model is further provided with: the device also comprises a heat accumulator A, a heat accumulator B, a four-way reversing valve A and a four-way reversing valve B; the high-temperature fan is connected with the four-way reversing valve A through a gas pipeline, the four-way reversing valve A is connected with the heat accumulator A and the heat accumulator B through a gas pipeline, and the four-way reversing valve B is connected with the circulating gas outlet, the circulating gas inlet, the heat accumulator A and the heat accumulator B through a gas pipeline.
The utility model is further provided with: the adjacent surfaces of the jet flow bellows which are oppositely arranged adopt an interconnecting concave-convex structure, the heating device is arranged at the concave part, and the jet flow nozzle is arranged at the convex part.
The utility model is further provided with: the heating device is a resistance band or a radiant tube, and the radiant tube is an electric radiant tube or a fuel gas radiant tube.
The utility model is further provided with: the jet nozzle is a slit nozzle or a circular nozzle.
The utility model is further provided with: the surface of the jet bellows, on which the heating device is arranged, is coated with a high emissivity coating.
In summary, the utility model has the following beneficial effects:
(1) The circulating jet flow of the high-temperature protective gas in the furnace is realized, the convection heat exchange between the protective gas in the furnace and the strip steel is enhanced, and the heating rate of the strip steel is improved.
(2) The strong stirring effect of the circulating shielding gas ensures that the temperature in the furnace is uniform and the temperature uniformity of the strip steel in the width direction is improved.
(3) The radiation heat exchange intensity of the strip steel is enhanced by spraying a high emissivity coating on the jet bellows and the heating device.
(4) After the four-way reversing valve and the heat accumulator are additionally arranged on the circulation pipeline of the protective gas, the temperature of the gas entering the high-temperature fan can be reduced, and the high-temperature fan is effectively protected. The heat accumulation and release functions of the heat accumulator ensure that the heat of the protective gas is not lost as much as possible, and the heat efficiency of the furnace is improved.
(5) The system can be installed and implemented in a heating section of a strip steel continuous annealing furnace unit, and also can be installed and implemented in a soaking section and a heat preservation section, so that the system has a stabilizing effect on the temperature of strip steel.
Drawings
FIG. 1 is a schematic diagram of a rapid strip heating system in a low temperature furnace zone according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram of a high Wen Luou strip steel rapid heating system (resistance strip, four-way reversing valve position I state) according to an embodiment of the utility model;
FIG. 3 is a schematic diagram of a high Wen Luou strip steel rapid heating system (resistance strip, four-way reversing valve position II state) according to an embodiment of the utility model; the method comprises the steps of carrying out a first treatment on the surface of the
FIG. 4 is a schematic diagram of a high Wen Luou strip steel rapid heating system (radiant tube, four-way reversing valve position I state) according to an embodiment of the utility model; the method comprises the steps of carrying out a first treatment on the surface of the
FIG. 5 is a schematic diagram of a high Wen Luou strip steel rapid heating system (radiant tube, four-way reversing valve position II state) according to an embodiment of the utility model; .
In the figure: 1. a furnace lining; 2. a jet bellows; 3. a resistive band; 4. jet nozzle; 5. strip steel; 6. a strip steel travelling channel; 7. a recycle gas outlet; 8. a recycle gas inlet; 9. circulating a gas; 10. a high temperature fan; 11. a gas conduit; 12. a heat accumulator A; 13. a heat accumulator B; 14. a four-way reversing valve A; 15. a four-way reversing valve B; 16. a radiant tube.
Detailed Description
The utility model is described in further detail below with reference to fig. 1-5.
Embodiment one: a system for realizing rapid heating of strip steel comprises a furnace lining 1, a high-temperature fan 10 and a plurality of gas pipelines 11 which are oppositely arranged as shown in figure 1; a jet flow air box 2 is oppositely arranged between the furnace linings 1 which are oppositely arranged, jet flow nozzles 4 and a heating device are respectively arranged on the adjacent surfaces of the jet flow air boxes 2 which are oppositely arranged, and circulating gas inlets 8 are respectively arranged on the deviating surfaces of the jet flow air boxes 2 which are oppositely arranged; the furnace lining 1 is provided with a circulating gas outlet 7; the high temperature fan 10 is connected with the circulating gas inlet 8 and the circulating gas outlet 7 through a gas pipeline 11. The adjacent surfaces of the jet bellows 2 which are oppositely arranged adopt an interconnecting concave-convex structure, the heating device is arranged at the concave part, and the jet nozzle 4 is arranged at the convex part. The heating device is a resistor strip 3 or a radiant tube 16, and the radiant tube 16 is an electric radiant tube 16 or a fuel gas radiant tube 16. The jet nozzle 4 is a slit nozzle or a circular nozzle. The surface of the jet bellows 2 on which the heating device is arranged is coated with a high emissivity coating. A strip steel travelling channel 6 is arranged between the jet bellows 2 which are oppositely arranged.
The jet bellows 2 adopts concave-convex structure towards belted steel 5 one side, and heating device (resistance area 3 or radiant tube 16) is installed to the space that the concave part formed, is favorable to the efflux to exhaust, and the partial jet orifice 4 (slit spout or circular spout) of processing of bulge, jet orifice 4 help the shielding gas to form the efflux, impact belted steel 5 improves convection heat transfer intensity. The surface of the jet bellows 2 (towards one side of the strip steel 5) and the surface of the heating device are sprayed with a high-emissivity coating, so that the radiation heat exchange intensity in the furnace is improved. When the strip steel 5 is heated, the strip steel passes through the jet flow bellows 2 which are oppositely arranged, so that the jet flow bellows 2 and the heating device are arranged at the left side and the right side of the strip steel 5, and a symmetrical heating mode is formed. The back (back to belted steel 5 side) or the side of jet bellows 2 sets up circulating gas entry 8, sets up circulating gas export 7 on furnace wall 1, is taken out the high temperature protection gas in the stove from circulating gas export 7 by high temperature fan 10, after the pressure boost, blow into jet bellows 2, later spray impact belted steel 5 at jet nozzle 4, form the high strength convection heat transfer to belted steel 5, later disperse in the stove, form strong stirring effect to the stove gas, carry out convection heat transfer with stove heating device simultaneously for the stove temperature is even. The protection gas in the furnace circularly flows under the action of the high-temperature fan 10, so that the effect of enhancing heat exchange is achieved.
Embodiment two: a system for achieving rapid heating of strip steel 5, as shown in fig. 2-5, is substantially the same as the first embodiment, except that the system further comprises a heat accumulator a12, a heat accumulator B13, a four-way reversing valve a14, and a four-way reversing valve B15; the high-temperature fan 10 is connected with the four-way reversing valve A14 through a gas pipeline 11, the four-way reversing valve A14 is connected with the heat accumulator A12 and the heat accumulator B13 through the gas pipeline 11, and the four-way reversing valve B15 is connected with the circulating gas outlet 7, the circulating gas inlet 8, the heat accumulator A12 and the heat accumulator B13 through the gas pipeline 11. The heat accumulator A12 and the heat accumulator B13 can be small ball heat accumulator or honeycomb heat accumulator.
The jet bellows 2 adopts concave-convex structure towards belted steel 5 one side, and heating device (resistance area 3 or radiant tube 16) is installed to the space that the concave part formed, is favorable to the efflux to exhaust, and the partial jet orifice 4 (slit spout or circular spout) of processing of bulge, jet orifice 4 help the shielding gas to form the efflux, impact belted steel 5 improves convection heat transfer intensity. When the strip steel 5 is heated, the strip steel passes through the jet flow bellows 2 which are oppositely arranged, so that the jet flow bellows 2 and the heating device are arranged at the left side and the right side of the strip steel 5, and a symmetrical heating mode is formed. The back (back side to the strip steel 5) or the side of the jet bellows 2 is provided with a circulating gas inlet 8, the furnace lining 1 is provided with a circulating gas outlet 7, high-temperature protecting gas in the furnace is pumped out from the circulating gas outlet 7 by a high-temperature fan 10, flows through a four-way reversing valve B15 and flows into a heat accumulator A12, the high-temperature protecting gas exchanges heat with the heat accumulator A12, the temperature of the heat accumulator A12 rises, the temperature of the high-temperature protecting gas drops, the high-temperature protecting gas flowing out of the heat accumulator A12 flows into a four-way reversing valve A14 and then flows into the suction end of the high-temperature fan 10, after the pressure is increased by the high-temperature fan 10, the high-temperature protecting gas flows into the four-way reversing valve A14 and flows into the heat accumulator B13, the protecting gas exchanges heat with the heat accumulator B13, the temperature of the heat accumulator B13 drops, the protecting gas rises, the high-temperature protecting gas flows into the jet bellows 2 through the four-way reversing valve B15, then the jet bellows 5 is sprayed at a jet nozzle 4 to form high-strength heat exchange to the strip steel 5, and then dispersed in the furnace, a strong stirring effect is formed on the gas in the furnace, and the temperature is subjected to convection heat exchange with the heating device in the furnace, so that the temperature in the furnace is uniform. The furnace protecting gas circularly flows under the action of the high-temperature fan 10 to achieve the effect of enhancing heat exchange, as shown in fig. 2 and 4.
The four-way reversing valve A14 and the four-way reversing valve B15 need to rapidly switch valve positions after a certain period (such as 60s, 120s and the like) so as to change the gas flow direction. As shown in fig. 3 and 5, in the state of the valve position II of the four-way reversing valve, with respect to fig. 2 and 4, the gas flow direction after the valve position is changed is as follows: the high-temperature protection gas in the furnace is pumped out from the circulating gas outlet 7 by the high-temperature fan 10, flows through the four-way reversing valve B15 and flows into the heat accumulator B13, the high-temperature protection gas exchanges heat with the heat accumulator B13, the temperature of the heat accumulator B13 is increased, the temperature of the high-temperature protection gas is reduced, the high-temperature protection gas flowing out of the heat accumulator B13 flows into the four-way reversing valve A14 and then flows into the suction end of the high-temperature fan 10, after being boosted by the high-temperature fan 10, flows into the four-way reversing valve A14 and flows into the heat accumulator A12, the protection gas exchanges heat with the heat accumulator A12, the temperature of the heat accumulator A12 is reduced, the temperature of the protection gas is increased, and the protection gas flows through the four-way reversing valve B15 and is blown into the jet bellows 2. Then jet 4 to impact strip steel 5 to form high-strength convection heat exchange to strip steel 5, then disperse in furnace to form strong stirring action to gas in furnace, and at the same time make convection heat exchange with heating device in furnace to make the temperature in furnace uniform. The protection gas in the furnace circularly flows under the action of the high-temperature fan 10, so that the effect of enhancing heat exchange is achieved.
According to the utility model, a heating device (a resistor belt 3, an electric radiant tube, a gas radiant tube and the like) and a jet device (a slit, a round hole and the like) are synchronously arranged in a furnace for a furnace region with the furnace temperature below 700 ℃, under the action of a high-temperature fan 10, protection gas in the furnace is pumped out, the protection gas is blown into a jet bellows 2 after the wind pressure is lifted, then a jet nozzle 4 on the bellows forms high-speed jet, and the high-speed jet impacts on a strip steel 5 to be heated and performs high-efficiency convection heat exchange with the strip steel 5.
According to the utility model, a heating device (a resistor belt 3, an electric radiant tube, a gas radiant tube and the like) and a jet device (a slit, a round hole and the like) are synchronously arranged in a furnace region with the furnace temperature above 700 ℃, under the action of a high-temperature fan 10, protection gas in the furnace is pumped out, the protection gas firstly flows through a heat accumulator A12 to be cooled, then flows into the fan to lift wind pressure, then flows into a heat accumulator B13 to be heated, is blown into a jet bellows 2, then a jet nozzle 4 on the bellows forms high-speed jet, and is impacted on strip steel 5 to be heated, and high-efficiency convection heat exchange is carried out with the strip steel 5, so that heat accumulation and heat release circulation of the heat accumulator A12 and the heat accumulator B13 are realized. The heat accumulator A12, the heat accumulator B13, the four-way reversing valve A14 and the four-way reversing valve B15 realize the cooling of the high-temperature protection gas in the furnace and the heating of the protection gas at the outlet of the fan through the valve position switching of the four-way reversing valve.
The present embodiment is only for explanation of the present utility model and is not to be construed as limiting the present utility model, and modifications to the present embodiment, which may not creatively contribute to the present utility model as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present utility model.
Claims (6)
1. A system for realizing rapid heating of strip steel is characterized in that: comprises a furnace lining (1), a high-temperature fan (10) and a plurality of gas pipelines (11) which are oppositely arranged; jet flow bellows (2) are oppositely arranged between the furnace linings (1) which are oppositely arranged, jet flow nozzles (4) and heating devices are arranged on adjacent surfaces of the jet flow bellows (2) which are oppositely arranged, and circulating gas inlets (8) are arranged on deviating surfaces of the jet flow bellows (2) which are oppositely arranged; a circulating gas outlet (7) is arranged on the furnace lining (1); the high-temperature fan (10) is connected with the circulating gas inlet (8) and the circulating gas outlet (7) through a gas pipeline (11).
2. The system for realizing rapid heating of strip steel according to claim 1, wherein: the device also comprises a heat accumulator A (12), a heat accumulator B (13), a four-way reversing valve A (14) and a four-way reversing valve B (15); the high-temperature fan (10) is connected with the four-way reversing valve A (14) through a gas pipeline (11), the four-way reversing valve A (14) is connected with the heat accumulator A (12) and the heat accumulator B (13) through the gas pipeline (11), and the four-way reversing valve B (15) is connected with the circulating gas outlet (7), the circulating gas inlet (8), the heat accumulator A (12) and the heat accumulator B (13) through the gas pipeline (11).
3. A system for rapid heating of strip steel according to claim 1 or 2, characterized in that: the adjacent surfaces of the jet bellows (2) which are oppositely arranged adopt an interconnecting concave-convex structure, the heating device is arranged at the concave part, and the jet nozzle (4) is arranged at the convex part.
4. The system for realizing rapid heating of strip steel according to claim 1, wherein: the heating device is a resistor strip (3) or a radiant tube (16), and the radiant tube (16) is an electric radiant tube or a fuel gas radiant tube.
5. The system for realizing rapid heating of strip steel according to claim 1, wherein: the jet nozzle (4) is a slit nozzle or a circular nozzle.
6. The system for realizing rapid heating of strip steel according to claim 1, wherein: the surface of the jet bellows (2) on which the heating device is arranged is coated with a high emissivity coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320293836.XU CN220149622U (en) | 2023-02-23 | 2023-02-23 | System for realizing rapid heating of strip steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320293836.XU CN220149622U (en) | 2023-02-23 | 2023-02-23 | System for realizing rapid heating of strip steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220149622U true CN220149622U (en) | 2023-12-08 |
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ID=89006329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320293836.XU Active CN220149622U (en) | 2023-02-23 | 2023-02-23 | System for realizing rapid heating of strip steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220149622U (en) |
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2023
- 2023-02-23 CN CN202320293836.XU patent/CN220149622U/en active Active
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