Radiant heating device

Abstract

Provided is a radiant heating device. The radiant heating device according to the present disclosure comprises: a combustion chamber body having a combustion chamber therein; a burner configured to preheat the combustion chamber by supplying fuel and an oxidizer and, after preheating, to supply only fuel into the combustion chamber; an oxidizer injection nozzle for supplying the oxidizer to the combustion chamber; and a gas discharge pipe for discharging exhaust gas circulated in the combustion chamber.

Description

Radiation heat dissipation device

[0001] The present disclosure relates to a radiant heat dissipation device, and more specifically, to a radiant heat dissipation device utilizing flameless combustion.

[0002] Generally, steel mills use radiant tubes as devices to indirectly heat steel sheets in continuous annealing furnaces or heat treatment furnaces for cold rolling and plating processes.

[0003] The radiant tube is configured so that when the flame and high-temperature combustion exhaust gas generated from a burner installed at the inlet travel along the interior to the outlet and heat the tube surface, the steel plate can be heated through radiant heat from the heated surface.

[0004] However, radiant tubes have disadvantages such as high NOx generation in the flame-existing region, large temperature variations on the device surface, and reduced radiative heat transfer efficiency to the steel plate due to the tube's geometric shape.

[0005] To complement this, technology is being introduced that maximizes radiative heat transfer efficiency by installing a plate-shaped radiative heat dissipation device parallel to the steel plate, and ensures uniform surface temperature and minimizes NOx generation by enabling flameless combustion inside the device.

[0006] However, for flameless combustion to be realized, the internal temperature of the device must be secured above the fuel's autoignition temperature.

[0007] The present disclosure aims to provide a radiant heat dissipation device that preheats the interior of a device through a burner to raise the temperature to the autoignition temperature of the fuel, and, once preheating is complete, supplies fuel or an oxidizer from the burner to enable flameless combustion.

[0008] A radiant heat dissipation device according to one embodiment of the present disclosure may include a combustion chamber body having a combustion chamber inside and positioned parallel to a steel plate, and a burner provided on one side of the combustion chamber body to supply fuel and an oxidizer to the combustion chamber to preheat the combustion chamber to the spontaneous ignition temperature of the fuel, and to supply only fuel into the combustion chamber after the combustion chamber has been preheated.

[0009] Additionally, the radiative heat dissipation device may include an oxidizer injection nozzle provided on one side of the combustion chamber body to supply an oxidizer to the combustion chamber after preheating the combustion chamber to create a recirculation area, and a gas discharge pipe provided on one side of the combustion chamber body to discharge exhaust gas circulating in the combustion chamber.

[0010] The combustion chamber body can have a flat or curved shape depending on the shape of the steel plate.

[0011] The burner can be installed in the center of one side of the combustion chamber body.

[0012] Additionally, the burner may include a fuel injection pipe for injecting fuel into a combustion chamber, and an oxidizer injection pipe provided on the outside of the fuel injection pipe for injecting an oxidizer into the combustion chamber.

[0013] The oxidizer injection nozzle and the gas exhaust pipe can be installed apart from the burner.

[0014] In addition, the oxidizer injection nozzle and the gas exhaust pipe can be arranged facing each other with the burner as the center.

[0015] The combustion chamber body may include a hollow structure having a rectangular cross-section.

[0016] In addition, it may further include a first heat exchanger provided on one side of the combustion chamber body and for preheating the fuel and oxidizer supplied to the combustion chamber using exhaust gas discharged from the combustion chamber.

[0017] In addition, a first fuel supply pipe for supplying fuel may be connected to the fuel injection pipe.

[0018] A first oxidizer supply pipe for supplying oxidizer can be connected to the oxidizer injection pipe and the oxidizer injection nozzle.

[0019] In addition, the first heat exchanger may be provided in the first fuel supply pipe and the first oxidizer supply pipe.

[0020] A radiant heat dissipation device according to another embodiment of the present disclosure may include a combustion chamber body having a combustion chamber inside and positioned parallel to a steel plate, and a burner provided on one side of the combustion chamber body for supplying fuel and an oxidizer to the combustion chamber to preheat the combustion chamber to the spontaneous ignition temperature of the fuel, and for supplying only an oxidizer into the combustion chamber after preheating the combustion chamber.

[0021] Additionally, the radiant heat dissipation device may include a fuel injection nozzle provided on one side of the combustion chamber body for supplying fuel to the combustion chamber after preheating the combustion chamber, and a gas exhaust pipe provided on one side of the combustion chamber body for discharging exhaust gas circulating inside the combustion chamber.

[0022] The combustion chamber body can have a flat or curved shape depending on the shape of the steel plate.

[0023] The fuel injection nozzle may be provided in the center of one side of the combustion chamber body.

[0024] Additionally, the burner may include a fuel injection pipe for injecting fuel into a combustion chamber, and an oxidizer injection pipe provided on the outside of the fuel injection pipe for injecting an oxidizer into the combustion chamber.

[0025] The burner and the exhaust pipe may be installed spaced apart from the fuel injection nozzle.

[0026] In addition, the burner and the gas exhaust pipe can be arranged facing each other with the fuel injection nozzle at the center.

[0027] The combustion chamber body may include a hollow structure having a rectangular cross-section.

[0028] In addition, it may further include a second heat exchanger provided on one side of the combustion chamber body and for preheating the fuel and oxidizer supplied to the combustion chamber using exhaust gas discharged from the combustion chamber.

[0029] In addition, a second fuel supply pipe for supplying fuel may be connected to the fuel injection pipe and the fuel injection nozzle.

[0030] A second oxidizer supply pipe for supplying oxidizer can be connected to the oxidizer injection pipe of the burner.

[0031] In addition, the second heat exchanger may be provided in the second fuel supply pipe and the second oxidizer supply pipe.

[0032] According to an embodiment of the present disclosure, the interior of the device is preheated through a burner to raise the temperature to the spontaneous ignition temperature of the fuel, and once preheating is complete, flameless combustion can be achieved by supplying fuel or an oxidizer from the burner.

[0033] Accordingly, the radiative heat dissipation device according to the embodiment can uniformly regulate the internal and surface temperatures of the device and minimize NOx generation while being positioned parallel to the steel plate, thereby maximizing radiative heat transfer efficiency.

[0034] FIG. 1 is a schematic perspective view of a planar radiative heat dissipation device according to a first embodiment of the present disclosure.

[0035] Figure 2 is a cross-sectional view showing the internal flow of the device during preheating of Figure 1.

[0036] Figure 3 is a cross-sectional view showing the internal flow of the device after preheating of Figure 1.

[0037] FIG. 4 is a cross-sectional view of a radiative heat dissipation device according to a second embodiment of the present disclosure.

[0038] FIG. 5 is a schematic perspective view of a planar radiative heat dissipation device according to a third embodiment of the present disclosure.

[0039] Figure 6 is a cross-sectional view showing the internal flow of the device during preheating of Figure 5.

[0040] Figure 7 is a cross-sectional view showing the internal flow of the device after preheating of Figure 5.

[0041] FIG. 8 is a cross-sectional view of a radiative heat dissipation device according to a fourth embodiment of the present disclosure.

[0042] FIG. 9 is a schematic perspective view of a curved radiative heat dissipation device according to the fifth embodiment of the present disclosure.

[0043] Hereinafter, embodiments of the present invention are described with reference to the attached drawings so that those skilled in the art can easily implement the present invention. As will be easily understood by those skilled in the art, the embodiments described below may be modified in various forms without departing from the concept and scope of the present invention. Where possible, identical or similar parts are indicated using the same reference numerals in the drawings.

[0044] The technical terms used below are for the reference of specific embodiments only and are not intended to limit the invention. The singular forms used herein include plural forms unless phrases clearly indicate otherwise. The meaning of "comprising" as used in the specification specifies a particular characteristic, area, integer, step, action, element, and / or component, and does not exclude the presence or addition of other particular characteristic, area, integer, step, action, element, component, and / or group.

[0045] All terms used below, including technical and scientific terms, have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Terms defined in advance are further interpreted to have meanings consistent with relevant technical literature and the present disclosure, and are not interpreted in an ideal or highly formal sense unless otherwise defined.

[0046] Referring to FIGS. 1 to 3, the radiant heat dissipation device (1) according to the first embodiment of the present disclosure supplies fuel and an oxidizer to the combustion chamber (11) through a burner (20) to preheat the combustion chamber (11) to the natural ignition temperature of the fuel, and after preheating the combustion chamber (11), supplies only fuel through the burner (20).

[0047] The radiant heat dissipation device (1) may include a combustion chamber body (10), a burner (20), an oxidizer injection nozzle (30), and a gas discharge pipe (40).

[0048] The combustion chamber body (10) has a combustion chamber (11) inside and can be arranged parallel to a steel plate (not shown) to be heated.

[0049] Additionally, a burner (20) may be provided on one side of the combustion chamber body (10), and the burner (20) is configured to preheat the combustion chamber (11) by supplying fuel and an oxidizer up to the natural ignition temperature of the fuel, and then supply only fuel into the combustion chamber (11) after the combustion chamber (11) has been preheated.

[0050] An oxidizer injection nozzle (30) is provided on one side of the combustion chamber body (10) and can supply an oxidizer to the combustion chamber (11) after preheating the combustion chamber (11) to create a recirculation area.

[0051] The combustion chamber body (10) may have a flat shape (see FIG. 1) or a curved shape (see FIG. 8) depending on the shape of the steel plate to be heated.

[0052] Hereinafter, with reference to FIGS. 1 to 3, a burner (20) is installed in the center of one side of the combustion chamber body (10) to supply fuel and an oxidizer to the combustion chamber (11) to preheat the combustion chamber (11), and after preheating the combustion chamber (11), only fuel is supplied from the burner (20) to the combustion chamber (11).

[0053] The combustion chamber body (10) may be made of a hollow structure having a square cross-section, but the shape of the combustion chamber body of the present disclosure is not necessarily limited to this.

[0054] Additionally, the burner (20) can be installed in the center of one side of the combustion chamber body (10) so as to effectively supply fuel and oxidizer to the combustion chamber (11) during preheating of the combustion chamber (11).

[0055] The burner (20) may include a fuel injection pipe (21) provided at its center for injecting fuel into the combustion chamber (11), and an oxidizer injection pipe (23) provided on the outside of the fuel injection pipe (21) for injecting an oxidizer into the combustion chamber (11).

[0056] Additionally, the oxidizer injection nozzle (30) and the gas discharge pipe (40) may be installed spaced apart from the burner (20) on one side of the combustion chamber body (10) where the burner (20) is located, and arranged opposite to the burner (20).

[0057] That is, when a burner (20) is installed in the center of one side of the combustion chamber body (10) to preheat the combustion chamber (11), an oxidizer injection nozzle (30) can be installed at the top or bottom of the burner (20) so as to effectively supply an oxidizer to the combustion chamber (11) after the combustion chamber (11) has been preheated.

[0058] Additionally, the gas exhaust pipe (40) can be installed at the bottom or top of the burner (20) to effectively discharge the exhaust gas circulating in the combustion chamber (11).

[0059] A control valve (not shown) for controlling the opening and closing of the fuel injection pipe (21), oxidizer injection pipe (23), oxidizer injection nozzle (30), and gas discharge pipe (40) may each be provided.

[0060] Hereinafter, with reference to FIGS. 1 to 3, the operation of a planar radiative heat dissipation device (1) according to the first embodiment of the present disclosure will be described.

[0061] First, to preheat the combustion chamber (11) of the combustion chamber body (10), fuel and oxidizer are supplied to the combustion chamber (11) through the fuel injection pipe (21) and the oxidizer injection pipe (23) of the burner (20), respectively.

[0062] The supplied fuel and oxidizer flow in a roughly U-shape within the combustion chamber (11), as shown by the dotted arrow in FIG. 2.

[0063] That is, the fuel and oxidizer are supplied in a straight direction from one side (left side in Fig. 2) to the other side (right side in Fig. 2) of the central part of the combustion chamber (11), then strike the side of the combustion chamber body (10) facing the burner (20), branch out, flow in the upward and downward directions (±Y direction) in Fig. 2, and then flow again toward the burner (20) from the upper and lower sides of the combustion chamber (11).

[0064] The high-temperature flame and combustion exhaust gas generated during this process heat the combustion chamber (11) to preheat it.

[0065] After preheating the combustion chamber (11), when the temperature of the combustion chamber (11) reaches the natural ignition temperature of the fuel, for example, 750 to 800°C, an oxidizer is supplied to the combustion chamber (11) through the oxidizer injection nozzle (30) as shown in FIG. 3, thereby creating a recirculation zone in the combustion chamber (11).

[0066] At this time, the oxidizer injection pipe (23) of the burner (20) is blocked, and only fuel is injected through the fuel injection pipe (21) of the burner (20), thereby enabling flameless combustion in the combustion chamber (11).

[0067] That is, the fuel injected through the fuel injection pipe (21) of the burner (20) flows in the direction indicated by the dotted arrow in the center of the combustion chamber (11), as shown in FIG. 3, and the oxidizer supplied through the oxidizer injection nozzle (30) flows in the direction indicated by the dotted arrow outside the fuel flow area.

[0068] Meanwhile, the high-temperature exhaust gas in the combustion chamber (11) can be discharged through the gas exhaust pipe (40) as shown in FIGS. 2 and FIGS. 3.

[0069] In this way, flameless combustion is performed in the combustion chamber (11), thereby allowing the interior and surface of the radiant heat dissipation device (1) to be heated uniformly, thus making the temperature of the interior and surface of the radiant heat dissipation device (1) uniform and minimizing NOx generation.

[0070] In addition, the radiant heat dissipation device (1) can be arranged parallel to the steel plate to maximize the radiant heat transfer efficiency.

[0071] The radiant heat dissipation device according to the second embodiment of the present disclosure is identical to the radiant heat dissipation device according to the first embodiment of the present disclosure except for the details described below, so a detailed description thereof is omitted.

[0072] The radiant heat dissipation device of the second embodiment is configured to increase radiant heat transfer efficiency by using high-temperature combustion exhaust gas discharged through the gas exhaust pipe (40) to preheat the fuel and oxidizer supplied into the interior of the combustion chamber body (10).

[0073] Referring to FIG. 4, the radiative heat dissipation device (1) according to the second embodiment of the present disclosure may further include a first heat exchanger (50).

[0074] The first heat exchanger (50) is positioned adjacent to a gas discharge pipe (40) on one side of the combustion chamber body (10), and can preheat the fuel and oxidizer supplied to the combustion chamber (11) using high-temperature exhaust gas discharged through the gas discharge pipe (40).

[0075] In the second embodiment, a first fuel supply pipe (60) for supplying fuel may be connected to the fuel injection pipe (21) of the burner (20).

[0076] Additionally, a first oxidizer supply pipe (61) for supplying oxidizer can be connected to the oxidizer injection pipe (23) and the oxidizer injection nozzle (30) of the burner (20).

[0077] The first heat exchanger (50) may be provided in the first fuel supply pipe (60) and the first oxidizer supply pipe (61).

[0078] The first fuel supply pipe (60) is a pipe that supplies fuel to the fuel injection pipe (21) of the burner (20), and the fuel flowing through the first fuel supply pipe (60) can be preheated while passing through the first heat exchanger (50) and then injected into the combustion chamber (11) through the fuel injection pipe (21).

[0079] Additionally, the first oxidizer supply pipe (61) is a pipe that supplies oxidizer to the oxidizer injection pipe (23) and the oxidizer injection nozzle (30) of the burner (20).

[0080] Accordingly, the oxidizer flowing through the first oxidizer supply pipe (61) is preheated while passing through the first heat exchanger (50), and then injected into the combustion chamber (11) through the oxidizer injection pipe (23) and the oxidizer injection nozzle (30) of the burner (20).

[0081] In this way, the radiant heat dissipation device (1) of the second embodiment can increase the radiant heat transfer efficiency by preheating the fuel and oxidizer through the first heat exchanger (50) arranged adjacent to the gas discharge pipe (40) and supplying them to the combustion chamber (11).

[0082] The radiant heat dissipation device (1) according to the third embodiment of the present disclosure supplies fuel and an oxidizer to the combustion chamber (11) through a burner (20) to preheat the combustion chamber (11) to the natural ignition temperature of the fuel, and after preheating the combustion chamber (11), supplies only the oxidizer through the burner (20).

[0083] The radiant heat dissipation device according to the third embodiment of the present disclosure is identical to the radiant heat dissipation device according to the first embodiment of the present disclosure except for the details described below, so a detailed description thereof is omitted.

[0084] Referring to FIGS. 5 to 7, the radiant heat dissipation device (1) according to the third embodiment of the present disclosure, unlike the first and second embodiments, has a fuel injection nozzle (70) installed in the center of one side of the combustion chamber body (10).

[0085] Additionally, the burner (20) and the gas exhaust pipe (40) are installed spaced apart from the fuel injection nozzle (70) on one side of the combustion chamber body (10) and can be arranged facing each other with the fuel injection nozzle (70) as the center.

[0086] That is, the burner (20) can be installed at the upper or lower part of the fuel injection nozzle (70) so as to effectively supply an oxidizer to the combustion chamber (11) after preheating the combustion chamber (11).

[0087] Additionally, the gas exhaust pipe (40) may be installed at the bottom or top of the fuel injection nozzle (70) to effectively discharge exhaust gas circulating in the combustion chamber (11).

[0088] Hereinafter, with reference to FIGS. 5 to 7, the operation of a planar radiative heat dissipation device according to a third embodiment of the present disclosure will be described.

[0089] First, to preheat the combustion chamber (11) of the combustion chamber body (10), fuel and oxidizer are supplied to the combustion chamber (11) from the fuel injection pipe (21) and the oxidizer injection pipe (23) of the burner (20). At this time, the fuel injection of the fuel injection nozzle (70) is blocked.

[0090] In this way, the fuel and oxidizer supplied through the fuel injection pipe (21) and the oxidizer injection pipe (23) flow in the combustion chamber (11) in a direction such as the dotted arrow shown in FIG. 6, for example, clockwise.

[0091] That is, fuel and oxidizer are supplied in a curved direction as shown by the dotted arrow in Fig. 6 from one side (left side in Fig. 6) to the other side (right side in Fig. 6) inside the combustion chamber (11), and then supplied in a curved direction as shown by the dotted arrow in Fig. 6 from the other side (rear side in Fig. 6) to one side (left side in Fig. 6) inside the combustion chamber (11).

[0092] The high-temperature flame and combustion exhaust gas generated during this process heat the combustion chamber (11) to preheat it.

[0093] After preheating the combustion chamber (11), when the temperature of the combustion chamber (11) reaches the natural ignition temperature of the fuel, for example, 750 to 800°C, fuel is supplied to the combustion chamber (11) through the fuel injection nozzle (70) as shown in FIG. 7, thereby creating a recirculation zone in the combustion chamber (11).

[0094] At this time, fuel supplied from the fuel injection pipe (21) of the burner (20) is cut off, and only the oxidizer is injected through the oxidizer injection pipe (23) of the burner (20), thereby enabling flameless combustion in the combustion chamber (11).

[0095] That is, the fuel injected through the fuel injection nozzle (70) flows in the direction indicated by the dotted arrow in FIG. 7 in the center of the combustion chamber (11), and the oxidizer supplied through the oxidizer injection pipe (23) of the burner (20) flows in the direction indicated by the dotted arrow in FIG. 7 outside the fuel flow area.

[0096] Meanwhile, the high-temperature exhaust gas in the combustion chamber (11) can be discharged through the gas exhaust pipe (40) as shown in FIGS. 6 and 7.

[0097] In this way, since flameless combustion is performed in the combustion chamber (11), the interior and surface of the radiant heat dissipation device (1) can be heated uniformly, thereby making the temperature of the interior and surface of the radiant heat dissipation device (1) uniform and minimizing NOx generation.

[0098] In addition, the radiant heat dissipation device (1) can be arranged parallel to the steel plate to maximize the radiant heat transfer efficiency.

[0099] The radiative heat dissipation device according to the fourth embodiment of the present disclosure is identical to the radiative heat dissipation device according to the third embodiment of the present disclosure except for the details described below, so a detailed description thereof is omitted.

[0100] Referring to FIG. 8, the radiative heat dissipation device according to the fourth embodiment of the present disclosure may further include a second heat exchanger (50-1).

[0101] The second heat exchanger (50-1) is positioned adjacent to a gas discharge pipe (40) on one side of the combustion chamber body (10), and can preheat the fuel and oxidizer supplied to the combustion chamber (11) using high-temperature exhaust gas discharged through the gas discharge pipe (40).

[0102] In the fourth embodiment, a second fuel supply pipe (60-1) for supplying fuel may be connected to the fuel injection pipe (21) and the fuel injection nozzle (70) of the burner (20).

[0103] Additionally, a second oxidizer supply pipe (61-1) for supplying oxidizer can be connected to the oxidizer injection pipe (23) of the burner (20).

[0104] The second heat exchanger (50-1) may be provided in the second fuel supply pipe (60-1) and the second oxidizer supply pipe (61-1).

[0105] The second fuel supply pipe (60-1) is a pipe that supplies fuel to the fuel injection pipe (21) and fuel injection nozzle (70) of the burner (20).

[0106] Fuel flowing through the second fuel supply pipe (60-1) is preheated while passing through the second heat exchanger (50-1) and then injected into the combustion chamber (11) through the fuel injection pipe (21) and fuel injection nozzle (70).

[0107] Additionally, the second oxidizer supply pipe (61-1) is a pipe that supplies oxidizer to the oxidizer injection pipe (23) of the burner (20).

[0108] Accordingly, the oxidizer flowing through the second oxidizer supply pipe (61-1) is preheated while passing through the second heat exchanger (50-1) and then injected into the combustion chamber (11) through the oxidizer injection pipe (23) of the burner (20).

[0109] In this way, the radiant heat dissipation device (1) of the fourth embodiment can increase the radiant heat transfer efficiency by preheating the fuel and oxidizer through a second heat exchanger (50-1) arranged adjacent to the gas discharge pipe (40) and supplying them to the combustion chamber (11).

[0110] FIG. 9 shows an embodiment in which the combustion chamber body (10-1) in the structure of the planar radiative heat dissipation device of FIG. 1 has a curved structure.

[0111] In cases where the object to be heated (steel plate) is not flat but forms a curved surface, the radiative heat dissipation device can be shaped into a curved surface as shown in Fig. 8 and positioned parallel to the object to be heated (steel plate) to further increase the radiative heat transfer efficiency.

[0112] Although the present disclosure has been described through preferred embodiments as described above, those skilled in the art will readily understand that the present disclosure is not limited thereto and that various modifications and variations are possible without departing from the scope of the claims set forth below.

[0113] (Explanation of symbols)

[0114] 1: Radiant heat dissipation device

[0115] 10: Combustion chamber body

[0116] 11: Combustion chamber

[0117] 20: Burner

[0118] 30: Oxidizer spray nozzle

[0119] 40: Gas exhaust pipe

Claims

1. A combustion chamber body having an internal combustion chamber and capable of being positioned parallel to a steel plate to be heated, A burner provided on one side of the combustion chamber body, for supplying fuel and an oxidizer to the combustion chamber to preheat the combustion chamber to the spontaneous ignition temperature of the fuel, and for supplying only fuel into the combustion chamber after preheating the combustion chamber. An oxidizer injection nozzle provided on one side of the combustion chamber body and for supplying an oxidizer to the combustion chamber after preheating the combustion chamber to create a recirculation zone, and A gas discharge pipe provided on one side of the combustion chamber body and for discharging exhaust gas circulating in the combustion chamber Radiation heat dissipation device including 2. In Paragraph 1, A radiant heat dissipation device in which the combustion chamber body has a flat or curved shape depending on the shape of the steel plate.

3. In Paragraph 1, The burner is a radiant heat dissipation device installed in the center of one side of the combustion chamber body.

4. In Paragraph 3, The above burner is a radiant heat dissipation device comprising a fuel injection pipe for injecting fuel into the combustion chamber, and an oxidizer injection pipe provided on the outside of the fuel injection pipe for injecting an oxidizer into the combustion chamber.

5. In Paragraph 3, A radiant heat dissipation device in which the oxidizer injection nozzle and the gas discharge pipe are installed spaced apart from the burner.

6. In Paragraph 5, A radiative heat dissipation device in which the oxidizer injection nozzle and the gas exhaust pipe are arranged opposite each other with the burner as the center.

7. In Paragraph 1, A radiant heat dissipation device comprising a hollow structure having a rectangular cross-section, wherein the combustion chamber body described above includes a hollow structure.

8. In any one of paragraphs 4 through 7, A radiant heat dissipation device further comprising a first heat exchanger provided on one side of the combustion chamber body and for preheating fuel and oxidizer supplied to the combustion chamber using exhaust gas discharged from the combustion chamber.

9. In Paragraph 8, A radiant heat dissipation device in which a first fuel supply pipe for supplying fuel is connected to the above fuel injection pipe.

10. In Paragraph 9, A radiant heat dissipation device in which a first oxidizer supply pipe for supplying an oxidizer is connected to the above-mentioned oxidizer injection pipe and the above-mentioned oxidizer injection nozzle.

11. In Paragraph 10, The above first heat exchanger is a radiative heat dissipation device provided in the above first fuel supply pipe and the above first oxidizer supply pipe.

12. A combustion chamber body having a combustion chamber inside and capable of being positioned parallel to a steel plate to be heated, A burner provided on one side of the above-mentioned combustion chamber body, for supplying fuel and an oxidizer to the combustion chamber to preheat the combustion chamber to the spontaneous ignition temperature of the fuel, and for supplying only an oxidizer into the combustion chamber after preheating the combustion chamber. A fuel injection nozzle provided on one side of the combustion chamber body and for supplying fuel to the combustion chamber after preheating the combustion chamber, and A gas discharge pipe provided on one side of the combustion chamber body and for discharging exhaust gas circulating inside the combustion chamber A radiant heat dissipation device including 13. In Paragraph 12, A radiant heat dissipation device in which the combustion chamber body has a flat or curved shape depending on the shape of the steel plate.

14. In Paragraph 12, The above fuel injection nozzle is a radiant heat dissipation device provided in the central part of one side of the combustion chamber body.

15. In Paragraph 14, The above burner is a radiant heat dissipation device comprising a fuel injection pipe for injecting fuel into the combustion chamber, and an oxidizer injection pipe provided on the outside of the fuel injection pipe for injecting an oxidizer into the combustion chamber.

16. In Paragraph 14, A radiant heat dissipation device in which the burner and the gas exhaust pipe are installed spaced apart from the fuel injection nozzle.

17. In Paragraph 16, A radiant heat dissipation device in which the burner and the gas exhaust pipe are arranged opposite each other with the fuel injection nozzle as the center.

18. In Paragraph 12, A radiant heat dissipation device comprising a hollow structure having a rectangular cross-section, wherein the combustion chamber body described above includes a hollow structure.

19. In any one of paragraphs 15 through 18, A radiant heat dissipation device further comprising a second heat exchanger provided on one side of the combustion chamber body and for preheating fuel and oxidizer supplied to the combustion chamber using exhaust gas discharged from the combustion chamber.

20. In Paragraph 19, A radiant heat dissipation device in which a second fuel supply pipe for supplying fuel is connected to the fuel injection pipe and the fuel injection nozzle.

21. In Paragraph 19, A radiant heat dissipation device in which a second oxidizer supply pipe for supplying oxidizer is connected to the oxidizer injection pipe of the burner.

22. In Paragraph 21, The above second heat exchanger is a radiative heat dissipation device provided in the above second fuel supply pipe and the above second oxidizer supply pipe.

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