A full-oxygen combustion roaster with thermal energy protection

Abstract

The application discloses a full-oxygen combustion roaster with thermal energy protection and relates to the technical field of full-oxygen combustion roasters, which comprises a rack, a mounting rack and a fan mounted on one side of the rack, an arm lever arranged on the inner wall of the rack, a cover arranged at one end of the arm lever, a burner mounted on the cover, wherein the cover is composed of an upper cover plate and a lower cover plate, an inner layer protection mechanism is arranged on the lower cover plate, and a plurality of layers of isolation mechanisms are arranged between the upper cover plate and the lower cover plate. The full-oxygen combustion roaster with thermal energy protection has the synergistic effect of a multi-protection system, significantly reduces the heat flux density at the root of the burner, and effectively inhibits the thermal deformation of the cover.

Description

Technical Field

[0001] This invention relates to the field of oxy-fuel combustion oven technology, and more particularly to an oxy-fuel combustion oven with thermal protection. Background Technology

[0002] Ladle baking is a high-energy-consuming step in continuous casting. Traditional baking equipment mainly includes two types: ordinary burner type and regenerative type. The all-oxygen combustion baking equipment is a type of ladle baking equipment and an upgraded version. It uses oxygen with a purity of more than 90% instead of air as the combustion gas, which is directly mixed with fuel for combustion. It has advantages such as high thermal efficiency, fast baking speed and good environmental performance.

[0003] However, current thermal protection oxy-fuel combustion ovens have a simple structure and rely on traditional refractory insulation materials for isolation. During use, the concentrated heat at the burner root can still easily radiate back into the cover, which can easily lead to cover deformation as the usage time increases. Summary of the Invention

[0004] This invention discloses a thermal protection oxy-fuel combustion oven, aiming to solve the technical problem that current thermal protection oxy-fuel combustion ovens have simple structures and rely on traditional refractory insulation materials for isolation. During use, the concentrated heat at the burner root can still easily radiate back into the cover, causing the cover to deform over time.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A thermally protected oxy-fuel combustion oven includes a frame, a mounting bracket and a fan mounted on one side of the frame, an arm on one side of the inner wall of the frame, a cover at one end of the arm, a burner mounted on the cover, the cover being composed of an upper cover plate and a lower cover plate, an inner protective mechanism on the lower cover plate, a multi-layer isolation mechanism between the upper cover plate and the lower cover plate, and a partitioned diffusion mechanism at the top of the upper cover plate; The inner protective mechanism includes a mounting groove on the top of the lower cover plate, a fixing plate on the inner wall of the mounting groove, a mounting hole in the center of the fixing plate, a pressure groove on the inner wall of the mounting hole, an inner sleeve on the inner side of the mounting hole, a fire-resistant lining on the bottom of the fixing plate, an annular groove on the top of the inner sleeve, a protective filling layer inside the annular groove, and the bottom end of the burner passing through the inner wall of the inner sleeve.

[0006] In this solution, a high-strength heat barrier near the fire source is constructed at the root of the burner through a double-layer nested structure of inner jacket and protective filling layer. This effectively blocks the direct heat radiation and heat conduction of the high-temperature flame to the metal substrate of the cover. Combined with the refractory lining at the bottom, a heat insulation system from the inside out is formed. This not only specifically reduces the temperature at the contact point between the burner and the cover, but also significantly reduces the overall heating temperature of the cover, effectively preventing thermal deformation.

[0007] In a preferred embodiment, the multi-layer isolation mechanism includes two annular grooves disposed on the top of the fixed plate, with gaps provided between the two annular grooves and between the inner annular groove and the inner sleeve. The bottom of the upper cover plate is provided with two isolation layers, with the bottoms of the two isolation layers respectively embedded inside the two annular grooves.

[0008] The two ring grooves and the embedded isolation layer together form a multi-fold thermal barrier structure, which not only cuts off the solid heat conduction path through the air gap, but also greatly increases the thermal resistance by utilizing the flow channel formed by the gap, effectively blocking the transfer of heat to the outside of the cover and preventing the metal from overheating and deforming.

[0009] In a preferred embodiment, the partitioned diffusion mechanism includes three fixing blocks disposed on the top of the upper cover plate. The three fixing blocks are equidistantly distributed in a circle. Each fixing block has two grooves inside. Three heat dissipation holes are equidistantly distributed in a circle on the inner wall of the top of the upper cover plate located inside the two rings of the isolation layer. The bottom opening of the heat dissipation holes corresponds to the gap position. The top of the heat dissipation holes passes through the grooves and communicates with the interior of the fixing blocks. Diffuse holes are provided on both outer walls of the fixing blocks. The diffuser holes communicate with the interior of the grooves. The arm consists of an upper connecting arm and a lower connecting arm. The lower connecting arm is connected to the lower cover plate. Each of the three fixing blocks has two screw holes on its top. The upper connecting arm is screwed to the fixing block through the screw holes. The three fixing blocks and the upper cover plate are integrally formed.

[0010] The fixed block array, together with the built-in heat dissipation holes, grooves and diffusion holes, forms a heat dissipation channel similar to the chimney effect, which actively exhausts the high-temperature flue gas accumulated in the gap of the isolation layer to the atmosphere, avoiding the continuous accumulation of heat and causing severe deformation of the cover; at the same time, the integrated molding structure of the fixed block and the upper cover plate ensures the stability of the triangular support, actively reducing the internal temperature of the cover while evenly distributing the load of the arm, preventing the cover structure from deforming under long-term thermal cycling.

[0011] In a preferred embodiment, a baffle is installed at the bottom of the lower connecting arm. The baffle consists of a front plate and a rear plate. The outer wall of the rear plate near the front plate is provided with guide grooves that are equidistantly distributed laterally.

[0012] The front plate acts as a heat radiation shielding layer, directly blocking the high-temperature radiation from the ladle opening. The guide slots on the rear plate provide air convection, dispersing the heat as it passes through the frame and preventing temperature conduction to one side of the frame, thus avoiding interference from high temperatures on the internal structure of the frame. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of an all-oxygen combustion oven with thermal protection proposed in this invention.

[0014] Figure 2 This is a schematic diagram of the baffle installation structure of an all-oxygen combustion oven with thermal protection proposed in this invention.

[0015] Figure 3 For the present invention in Figure 2 A magnified structural diagram at point A in the middle.

[0016] Figure 4 This is a structural diagram of the refractory lining installation of an all-oxygen combustion baker with thermal protection proposed in this invention.

[0017] Figure 5 This is a structural diagram of the mounting slot for an all-oxygen combustion oven with thermal protection proposed in this invention.

[0018] Figure 6 This is a schematic diagram of the inner jacket installation structure of an all-oxygen combustion oven with thermal protection proposed in this invention.

[0019] Figure 7 This is a schematic diagram of the fixed block structure of an all-oxygen combustion oven with thermal protection proposed in this invention.

[0020] Figure 8 This is a structural diagram of the isolation layer installation of an all-oxygen combustion oven with thermal protection proposed in this invention.

[0021] Figure 9 This is a structural diagram of the fixing block of an all-oxygen combustion oven with thermal protection proposed in this invention.

[0022] In the diagram: 1. Frame; 2. Mounting bracket; 3. Fan; 4. First connecting pipe; 5. Second connecting pipe; 6. Adapter pipe; 7. Baffle; 701. Front plate; 702. Rear plate; 703. Guide groove; 8. Cover; 801. Upper cover plate; 802. Lower cover plate; 9. First flexible hose; 10. Second flexible hose; 11. Upper connecting arm; 12. Lower connecting arm; 14. Inner sleeve; 15. Fire-resistant lining; 16. Mounting groove; 17. Limiting post; 18. Fixing plate; 19. Limiting hole; 20. Annular groove; 21. Protective filling layer; 23. Mounting hole; 24. Pressure groove; 25. Burner; 26. First connector; 27. Second connector; 28. Fixing block; 29. ​​Isolation layer; 30. Heat dissipation hole; 32. Groove; 33. Diffuser hole; 34. Screw hole; 35. Sealing sleeve. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0024] Reference Figures 1 to 9 A thermal protection oxy-fuel combustion oven includes a frame 1, a mounting bracket 2 and a fan 3 installed on one side of the frame 1. An arm is provided on one side of the inner wall of the frame 1, and a cover 8 is provided at one end of the arm. A burner 25 is installed on the cover 8. The cover 8 is composed of an upper cover plate 801 and a lower cover plate 802. An inner protective mechanism is provided on the lower cover plate 802. A multi-layer isolation mechanism is provided between the upper cover plate 801 and the lower cover plate 802. A partitioned diffusion mechanism is provided at the top of the upper cover plate 801. The inner protective mechanism includes a mounting groove 16 located on the top of the lower cover plate 802. The inner wall of the mounting groove 16 is provided with a fixing plate 18. The fixing plate 18 has a mounting hole 23 in the center. The inner wall of the mounting hole 23 has a pressure groove 24. The inner side of the mounting hole 23 is provided with an inner sleeve 14. The bottom of the fixing plate 18 is covered with a fire-resistant lining 15. The top of the inner sleeve 14 has an annular groove. The inside of the annular groove is provided with a protective filling layer 21. The bottom end of the burner 25 passes through the inner wall of the inner sleeve 14.

[0025] Specifically, through the double-layer nested structure of the inner jacket 14 and the protective filling layer 21, a high-strength heat barrier near the fire source is constructed at the root of the burner 25, effectively blocking the direct heat radiation and heat conduction of the high-temperature flame to the metal substrate of the cover 8. Combined with the refractory lining 15 at the bottom, a heat insulation system from the inside out is formed, which not only specifically reduces the temperature at the contact point between the burner 25 and the cover 8, but also significantly reduces the overall heating temperature of the cover 8, effectively preventing thermal deformation.

[0026] The mounting groove 16 has equidistantly distributed circumferentially oriented posts 17 on its bottom inner wall, and the fixing plate 18 has equidistantly distributed circumferentially oriented holes 19. The oriented posts 17 and the oriented holes 19 are matched, and the bottom of the mounting groove 16 is provided with a support pad. The upper surface of the fixing plate 18 is flush with the top of the lower cover plate 802. The precise insertion and matching of the oriented posts 17 and the oriented holes 19 enables the fixing plate 18 and the fire-resistant lining 15 to be quickly positioned and securely installed. The support pad forms an elastic buffer interface between the fixing plate 18 and the bottom of the mounting groove 16, absorbing thermal expansion stress and preventing structural jamming caused by high-temperature deformation. At the same time, the oriented installation of the oriented posts 17 and the oriented holes 19 facilitates the later replacement and maintenance of the fire-resistant lining 15.

[0027] Reference Figure 5 , Figure 6 , Figure 7 and Figure 8 In a preferred embodiment, the multi-layer isolation mechanism includes two annular grooves 20 disposed on the top of the fixed plate 18, with gaps provided between the two annular grooves 20 and between the inner annular groove 20 and the inner sleeve 14. The bottom of the upper cover plate 801 is provided with two isolation layers 29, with the bottoms of the two isolation layers 29 respectively embedded inside the two annular grooves 20.

[0028] Specifically, the two annular grooves 20 and the embedded isolation layer 29 together form a multi-fold thermal barrier structure, which not only cuts off the solid heat conduction path through the air interlayer, but also greatly increases the thermal resistance by utilizing the flow channel formed by the gap, effectively blocking the transfer of heat to the outside of the cover 8 and preventing the metal from overheating and deforming.

[0029] Reference Figure 7 , Figure 8 and Figure 9 In a preferred embodiment, the partition diffusion mechanism includes three fixing blocks 28 disposed on the top of the upper cover plate 801. The three fixing blocks 28 are equidistantly distributed in a circular pattern. Each fixing block 28 has two grooves 32 inside. The inner wall of the top of the upper cover plate 801 located inside the two isolation layers 29 has three equidistantly distributed heat dissipation holes 30. The bottom opening of the heat dissipation holes 30 corresponds to the gap position. The top of the heat dissipation holes 30 passes through the grooves 32 and communicates with the interior of the fixing blocks 28. Diffuse holes 33 are provided on both outer walls of the fixing blocks 28. The diffuser holes 33 are connected to the interior of the grooves 32. The arm is composed of an upper connecting arm 11 and a lower connecting arm 12. The lower connecting arm 12 is connected to the lower cover plate 802. The top of each of the three fixing blocks 28 has two screw holes 34. The upper connecting arm 11 is screwed to the fixing blocks 28 through the screw holes 34. The three fixing blocks 28 and the upper cover plate 801 are integrally formed.

[0030] Specifically, the array of fixed blocks 28, together with the built-in heat dissipation holes 30, grooves 32 and diffusion holes 33, construct a heat dissipation channel similar to the chimney effect, which actively exhausts the high-temperature flue gas accumulated in the gaps of the isolation layer 29 to the atmosphere, avoiding the continuous accumulation of heat and causing severe deformation of the cover 8; at the same time, the integrated molding structure of the fixed blocks 28 and the upper cover plate 801 ensures the stability of the triangular support, actively reducing the internal temperature of the cover 8 while evenly distributing the load on the arm, preventing the cover 8 structure from deforming under long-term thermal cycling.

[0031] It should be noted that the refractory lining 15, the isolation layer 29, and the protective filling layer 21 in this solution are all made of ceramic fiber modules, making full use of their heat insulation, fire resistance, and heat preservation properties.

[0032] Reference Figure 1 , Figure 2 and Figure 3 In a preferred embodiment, a baffle 7 is installed at the bottom of the lower connecting arm 12. The baffle 7 is composed of a front plate 701 and a rear plate 702. The outer wall of the rear plate 702 near the front plate 701 is provided with guide grooves 703 that are equidistantly distributed laterally.

[0033] Specifically, the front plate 701 acts as a heat radiation shielding layer to directly block the high-temperature radiation from the ladle opening, while the guide groove 703 on the rear plate 702 can provide air convection, dissipating the heat as it passes through the frame 1 and preventing temperature conduction to one side of the frame 1, thus avoiding interference from high temperature to the internal structure of the frame 1.

[0034] Reference Figure 1 , Figure 2 , Figure 7 and Figure 8 In a preferred embodiment, a sealing sleeve 35 is provided at the center of the upper cover plate 801, the outer wall of the burner 25 passes through the inner side of the sealing sleeve 35, a second connector 27 is provided at the top of the burner 25, a first connector 26 is provided on one side of the burner 25, a gas tank is provided on the mounting frame 2, a first connecting pipe 4 is connected to the gas tank, a second connecting pipe 5 is connected to the outlet of the blower 3, and adapter pipes 6 are fixed on both sides of the frame 1. One end of the first connecting pipe 4 and the second connecting pipe 5 are respectively connected to the two adapter pipes 6, and a first hose 9 and a second hose 10 are respectively connected to the end of the two adapter pipes 6 near the cover 8. The first hose 9 is connected to the first connector 26, and the second hose 10 is connected to the second connector 27. Valves are provided on both adapter pipes 6.

[0035] The sealing sleeve 35 and the support pad mentioned above are both made of heat-resistant rubber. The sealing sleeve 35 forms a flexible sealing interface at the burner 25 through the tube, which not only prevents cold air from being drawn in and affecting the combustion efficiency, but also uses elastic deformation to compensate for the difference in thermal expansion, preventing the burner 25 or the cover 8 from cracking due to hard compression.

[0036] It should be noted that the first hose 9 and the second hose 10 are designed to facilitate the adjustment of the cover 8. Both the first hose 9 and the second hose 10 are made of high-temperature resistant materials, and the safety of the gas supply system must be the primary concern during use. Working principle: During use, under the action of the blower 3, the oxygen for combustion is introduced into the burner 25 through the second connecting pipe 5, the adapter pipe 6, and the second hose 10. It combines with the gas introduced by the first hose 9 and burns. The flame of combustion blows downward from the bottom of the burner 25, using the high-temperature flame to heat the ladle. At the same time, the strong radiant heat generated at the base of the burner 25 is first blocked by the near-fire source barrier formed by the inner jacket 14 and the protective filling layer 21. When the residual heat is transferred upward, it is further blocked by the multiple folding thermal resistance formed by the two rings of isolation layers 29 embedded in the annular groove 20. The partition structure cuts off the conduction path; the hot air accumulated in the gap is guided by the groove 32 inside the fixed block 28, rises through the heat dissipation hole 30 and is discharged through the diffusion hole 33, forming a chimney effect for active heat dissipation. In conjunction with the baffle 7 at the bottom of the lower connecting arm 12, the front plate 701 shields radiation and the rear plate 702 guides convection, effectively preventing heat from being conducted to the frame 1. In addition, the sealing sleeve 35 forms a flexible seal at the burner 25 through the pipe, compensating for thermal expansion displacement and avoiding structural cracking due to thermal stress, thereby achieving long-term protection of the cover 8 under high-temperature conditions.

[0037] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A thermally protected oxy-fuel combustion oven, comprising a frame (1), a mounting bracket (2) and a fan (3) mounted on one side of the frame (1), wherein an arm is provided on one side of the inner wall of the frame (1), and a cover (8) is provided at one end of the arm, and a burner (25) is mounted on the cover (8), characterized in that, The cover (8) is composed of an upper cover plate (801) and a lower cover plate (802). The lower cover plate (802) is provided with an inner protective mechanism. A multi-layer isolation mechanism is provided between the upper cover plate (801) and the lower cover plate (802). The top of the upper cover plate (801) is provided with a partition diffusion mechanism. The inner protective mechanism includes a mounting groove (16) on the top of the lower cover plate (802). The inner wall of the mounting groove (16) is provided with a fixing plate (18). The fixing plate (18) has a mounting hole (23) at its center. The inner wall of the mounting hole (23) is provided with a pressure groove (24). The inner side of the mounting hole (23) is provided with an inner sleeve (14). The bottom of the fixing plate (18) is covered with a refractory lining (15). The top of the inner sleeve (14) has an annular groove. The inside of the annular groove is provided with a protective filling layer (21). The bottom end of the burner (25) passes through the inner wall of the inner sleeve (14). The multi-layer isolation mechanism includes two annular grooves (20) on the top of the fixing plate (18). There are gaps between the two annular grooves (20) and between the inner annular groove (20) and the inner sleeve (14). The upper cover plate ( The bottom of the upper cover plate (801) is provided with two rings of isolation layers (29). The bottom of the two rings of isolation layers (29) are respectively embedded in the inner side of the two rings of annular grooves (20). The partition diffusion mechanism includes three fixing blocks (28) set on the top of the upper cover plate (801). The three fixing blocks (28) are equidistantly distributed in a circle. Each fixing block (28) has two grooves (32) inside. The inner wall of the top of the upper cover plate (801) located inside the two rings of isolation layers (29) has three equidistantly distributed heat dissipation holes (30). The bottom opening of the heat dissipation hole (30) corresponds to the gap position. The top of the heat dissipation hole (30) passes through the groove (32) and communicates with the inside of the fixing block (28). The outer walls on both sides of the fixing block (28) are provided with diffusion holes (33). The diffusion holes (33) are connected to the inside of the groove (32).

2. The all-oxygen combustion oven with thermal protection according to claim 1, characterized in that, The mounting groove (16) has equidistant circumferentially distributed limiting posts (17) on its bottom inner wall, and the fixing plate (18) has equidistant circumferentially distributed limiting holes (19). The limiting posts (17) are adapted to the limiting holes (19), and the bottom of the mounting groove (16) is provided with a support pad. The upper surface of the fixing plate (18) is flush with the top of the lower cover plate (802).

3. The all-oxygen combustion oven with thermal protection according to claim 1, characterized in that, The arm consists of an upper connecting arm (11) and a lower connecting arm (12). The lower connecting arm (12) is connected to the lower cover plate (802). The top of each of the three fixing blocks (28) is provided with two screw holes (34). The upper connecting arm (11) is screwed to the fixing block (28) through the screw holes (34). The three fixing blocks (28) and the upper cover plate (801) are integrally formed.

4. The all-oxygen combustion oven with thermal protection according to claim 3, characterized in that, The bottom of the lower connecting arm (12) is equipped with a baffle (7), which is composed of a front plate (701) and a rear plate (702). The rear plate (702) has guide grooves (703) that are evenly distributed laterally on the outer wall of the side close to the front plate (701).

5. A thermally protected oxy-fuel combustion oven according to claim 1, characterized in that, A sealing sleeve (35) is provided at the center of the upper cover plate (801), the outer wall of the burner (25) passes through the inner side of the sealing sleeve (35), a second connector (27) is provided at the top of the burner (25), and a first connector (26) is provided on one side of the burner (25).

6. A thermally protected oxy-fuel combustion oven according to claim 5, characterized in that, The mounting bracket (2) is equipped with an air tank, and the air tank is connected to a first connecting pipe (4). The outlet of the blower (3) is connected to a second connecting pipe (5). Both sides of the frame (1) are fixed with adapter pipes (6). One end of the first connecting pipe (4) and the second connecting pipe (5) are respectively connected to two adapter pipes (6). The two adapter pipes (6) are respectively connected to a first hose (9) and a second hose (10) at the end near the cover (8). The first hose (9) is connected to the first connector (26), and the second hose (10) is connected to the second connector (27). Both adapter pipes (6) are equipped with valves.

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