A ladle bottom direct baking energy-saving baking equipment

Abstract

The utility model discloses a kind of ladle bottom direct baking energy-saving baking equipment, including supporting assembly and baking assembly, the baking assembly is installed on the upper portion of support assembly side, the baking assembly includes baking cover, plunger type burner is installed in the middle part of baking cover lower side, and fuel pipe is installed in the upper side of baking cover and is communicated with the inner cavity of plunger type burner, the baking cover side is equipped with flue gas pipe.This ladle bottom direct baking energy-saving baking equipment, using sinking plunger type burner, flame direct injection ladle bottom when baking uses, for the effective heating of ladle bottom, reduce the temperature difference between ladle bottom and ladle lining, while being provided with annular fence, when heating ladle lining by moving up baking cover, the gap between baking cover and ladle is shielded by annular fence, reduce the heat loss of gap, while using the mode that flue gas preheats fuel, baking cover preheats oxygen, effectively save energy.

Description

Technical Field

[0001] This utility model relates to the field of baking equipment technology, specifically to an energy-saving baking equipment for direct baking of steel ladle bottoms. Background Technology

[0002] In the steelmaking process, the drying and baking of containers such as ladles and molten iron ladles usually requires the use of a baking machine. The baking machine heats the ladle, thereby reducing heat loss of molten steel during transportation and calming, stabilizing the tapping temperature, and improving the efficiency of continuous casting production.

[0003] Currently, during the baking process of steel ladles using a baking device, the flames emitted by the burners are difficult to reach the bottom of the ladle due to the influence of the burner installation position and burner structure. Most of the flames only act on the inner lining of the ladle to heat the lining, and it is not convenient to heat the bottom of the ladle. This results in a large temperature difference between the inner lining and the bottom of the ladle, which is not conducive to the baking of the ladle.

[0004] Some ovens use a sunken plunger type burner. Although this type of burner can directly deliver the flame to the bottom of the ladle, the baking cover needs to be moved up when baking the ladle lining. After the baking cover is moved up, it will separate from the ladle, creating a gap. There is a significant heat loss in the gap, which is not conducive to energy-saving use. At the same time, the baking cover in the oven will also heat up due to the temperature of the burner flame. This heat will be directly lost and is not easy to recover and reuse, resulting in shortcomings in the use of the oven. Utility Model Content

[0005] The technical problem this invention aims to solve is to overcome existing defects and provide an energy-saving ladle bottom direct-heating baking device. This device employs a sunken plunger-type burner, where the flame is directly injected into the ladle bottom during baking for effective heating, reducing the temperature difference between the ladle bottom and the ladle lining. Simultaneously, an annular baffle is installed; when the baking cover moves upward to heat the ladle lining, the annular baffle protects the gap between the baking cover and the ladle, reducing heat loss at the gap. Furthermore, the device utilizes flue gas to preheat the fuel and the baking cover to preheat the oxygen, effectively saving energy and solving the problems in the background technology.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a steel ladle bottom direct-heating energy-saving baking device, comprising a support assembly and a baking assembly. The baking assembly is installed on the upper side of the support assembly. The baking assembly includes a baking cover, a plunger-type burner installed in the middle of the lower side of the baking cover, and a fuel pipe connected to the inner cavity of the plunger-type burner installed on the upper side of the baking cover. An exhaust pipe is installed on the side of the baking cover, and a heat exchange assembly is provided on the upper side of the baking cover near the exhaust pipe and the fuel pipe. A preheating pipe is installed inside the baking cover, and the preheating pipe is coiled. An air inlet pipe is installed at one end of the preheating pipe on the upper side of the baking cover, and an air jet pipe is installed at the other end of the preheating pipe on the lower side of the baking cover. An annular protective structure is provided on the side of the baking cover.

[0007] As a preferred embodiment of this utility model, the annular protective structure includes an annular barrier fixed to the edge of the baking cover, and the annular barrier is located on the lower side of the baking cover.

[0008] As a preferred embodiment of this utility model, an annular liner is fixed to the inner side of the annular enclosure, and the annular liner is made of a high-temperature resistant and flame-retardant material.

[0009] As a preferred embodiment of this utility model, the heat exchange assembly includes a heat exchange box installed on the upper side of the baking cover, and the exhaust pipe and fuel pipe are both located inside the heat exchange box.

[0010] As a preferred embodiment of this utility model, the baking cover includes a load-bearing plate, an insulation plate is installed on the upper side of the load-bearing plate, a flame-retardant inner lining plate is installed on the lower side of the load-bearing plate, and the preheating pipe is located inside the flame-retardant inner lining plate.

[0011] As a preferred embodiment of the present invention, the support component includes a base, a positioning frame is fixedly installed on the base, a connecting frame is slidably arranged on the positioning frame, a guide frame is fixed at one end of the connecting frame near the positioning frame, and the connecting frame is slidably connected to the positioning frame through the guide frame.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. The steel ladle bottom direct drying energy-saving baking equipment of this utility model has a connecting frame installed on the positioning frame for supporting and limiting the baking component, which facilitates the adjustment and setting of the baking component position and the heating of the baking component. The positioning frame is driven by an externally set lifting component to control the movement of the baking component, so as to place the baking component on the top of the steel ladle. The baking component heats the bottom of the steel ladle and the inner lining of the steel ladle, reducing the heat loss of molten steel during transportation and calming, stabilizing the tapping temperature and improving the continuous casting production efficiency.

[0013] 2. The energy-saving ladle bottom direct baking equipment of this utility model delivers fuel to the plunger-type burner through a fuel pipe during use. The fuel is sprayed out by the plunger-type burner and burns to bake and heat the ladle. The plunger-type burner adopts a sunken structure, which makes it easy for the plunger-type burner to be close to the bottom of the ladle for baking and heating, reducing the temperature difference between the ladle lining and the bottom of the ladle, promoting uniform temperature inside the ladle, improving the service life of the ladle, ensuring the quality of molten steel, and facilitating the use of this baking equipment.

[0014] 3. In the example of the energy-saving baking equipment for direct baking of the bottom of the ladle, when heating the inner lining of the ladle, the position of the plunger-type burner is adjusted by moving the baking cover upward. After the baking cover is separated from the ladle, the gap between the baking cover and the ladle is blocked by the annular enclosure to reduce heat loss at the gap.

[0015] 4. In the steel ladle bottom direct drying energy-saving baking equipment of this utility model, the flue gas generated during the baking process is discharged through the flue pipe. After the flue gas enters the flue pipe, it exchanges heat with the fuel in the fuel pipe under the action of the heat exchange box. The heat in the flue gas preheats the fuel, which achieves energy saving. After the gas enters the preheating pipe through the air inlet pipe, the gas in the preheating pipe is preheated by the baking cover due to the influence of the installation position of the preheating pipe. The preheated gas is sprayed out through the jet pipe at the end of the preheating pipe. The sprayed gas facilitates the combustion of fuel in the steel ladle to bake and heat the steel ladle. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a front view structural diagram of the present utility model; Figure 3 This is a schematic diagram of the structure of the baking lid in this utility model; Figure 4 This is a cross-sectional view of the ring-shaped enclosure in this utility model; Figure 5 for Figure 4 Enlarged structural diagram at point A; Figure 6 This is a schematic diagram of the preheating pipe in this utility model.

[0017] In the diagram: 1. Base, 2. Positioning frame, 3. Connecting frame, 4. Guide frame, 5. Baking cover, 51. Load-bearing plate, 52. Insulation board, 53. Flame-retardant inner lining plate, 6. Plunger type burner, 7. Fuel pipe, 8. Exhaust pipe, 9. Heat exchange box, 10. Inlet pipe, 11. Preheating pipe, 12. Jet pipe, 13. Annular enclosure, 14. Annular lining plate. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1-6 This utility model provides a technical solution: a direct-heating energy-saving baking device for the bottom of a steel ladle, including a support component and a baking component. The baking component is installed on the upper side of the support component. The support component includes a base 1, a positioning frame 2 is fixedly installed on the base 1, a connecting frame 3 is slidably arranged on the positioning frame 2, and a guide frame 4 is fixed at one end of the connecting frame 3 near the positioning frame 2. The connecting frame 3 is slidably connected to the positioning frame 2 through the guide frame 4. It should be noted that a lifting component is provided on the side of the positioning frame 2 to control the up and down movement of the connecting frame 3. The lifting component includes, but is not limited to, a winch or an electric hydraulic cylinder. When this baking device is in use, the connecting frame 3 installed on the positioning frame 2 is used for supporting and limiting the baking component, which facilitates the adjustment and setting of the position of the baking component and the heating of the baking component. The externally set lifting component drives the positioning frame 2 to lift and control the movement of the baking component, which makes it easy to place the baking component on the top of the steel ladle and bake and heat the bottom of the steel ladle and the inner lining of the steel ladle through the set baking component, reducing the heat loss of molten steel during transportation and calming, stabilizing the tapping temperature, and improving the continuous casting production efficiency.

[0020] The baking assembly includes a baking cover 5, a plunger-type burner 6 installed in the lower center of the baking cover 5, and a fuel pipe 7 connected to the inner cavity of the plunger-type burner 6 installed on the upper side of the baking cover 5. The plunger-type burner 6 is equipped with an ignition device, which adopts existing technology. The plunger-type burner 6 is made of materials including, but not limited to, silicon carbide or stainless steel. During use, fuel is supplied to the plunger-type burner 6 through the fuel pipe 7. After being sprayed out by the plunger-type burner 6, the fuel burns and heats the ladle. The plunger-type burner 6 adopts a recessed structure, which facilitates the plunger-type burner 6 to be close to the bottom of the ladle for heating, reduces the temperature difference between the ladle lining and the bottom of the ladle, promotes uniform temperature inside the ladle, improves the service life of the ladle, and ensures the quality of the molten steel, thus facilitating the use of this baking equipment.

[0021] A smoke exhaust pipe 8 is installed on the side of the baking cover 5, and a heat exchange assembly is set on the upper side of the baking cover 5 near the smoke exhaust pipe 8 and the fuel pipe 7. The heat exchange assembly includes a heat exchange box 9 installed on the upper side of the baking cover 5. The smoke exhaust pipe 8 and the fuel pipe 7 are both located in the heat exchange box 9. The flue gas generated during the baking process is discharged through the smoke exhaust pipe 8. After the flue gas enters the smoke exhaust pipe 8, under the action of the heat exchange box 9, the flue gas in the smoke exhaust pipe 8 exchanges heat with the fuel in the fuel pipe 7. The heat in the flue gas is used to preheat the fuel, which achieves energy saving.

[0022] A preheating pipe 11 is installed inside the baking cover 5, and the preheating pipe 11 is arranged in a spiral. One end of the preheating pipe 11 is equipped with an air inlet pipe 10 located on the upper side of the baking cover 5, and the other end of the preheating pipe 11 is equipped with a jet pipe 12 located on the lower side of the baking cover 5. Gas is supplied into the air inlet pipe 10 through an external fan structure. The gas is preferably pure oxygen. Pure oxygen improves fuel combustion efficiency and combustion quality. After the gas enters the preheating pipe 11 through the air inlet pipe 10, the gas in the preheating pipe 11 is preheated by the baking cover 5 due to the installation position of the preheating pipe 11. The preheated gas is sprayed out through the jet pipe 12 at the end of the preheating pipe 11. The sprayed gas facilitates the combustion of fuel in the ladle and heats the ladle.

[0023] The baking cover 5 has an annular protective structure on its side. The annular protective structure includes an annular barrier 13 fixed to the edge of the baking cover 5 and the annular barrier 13 is located on the lower side of the baking cover 5. When heating the ladle lining, the baking cover 5 is moved up to adjust the position of the plunger-type burner 6. After the baking cover 5 is separated from the ladle, the annular barrier 13 blocks the gap between the baking cover 5 and the ladle to reduce heat loss at the gap. An annular liner 14 is fixed on the inner side of the annular liner 14. The annular liner 14 is made of high-temperature resistant flame-retardant material and is used for flame-retardant protection of the annular barrier 13.

[0024] The baking cover 5 includes a load-bearing plate 51, an insulation plate 52 is installed on the upper side of the load-bearing plate 51, and a flame-retardant inner lining plate 53 is installed on the lower side of the load-bearing plate 51. The preheating pipe 11 is located inside the flame-retardant inner lining plate 53. The insulation plate 52 is used to reduce heat loss at the baking cover 5, so that the heat on the baking cover 5 can act on the preheating pipe 11 to preheat the gas inside the preheating pipe 11.

[0025] It should be noted that the baking device can be equipped with temperature sensors for the bottom of the bag and the inner lining to assist in temperature detection during baking; a gas detection sensor can also be added to detect gas during flame combustion, avoiding safety hazards caused by insufficient oxygen supply leading to incomplete fuel combustion or excessive oxygen concentration.

[0026] This energy-saving ladle bottom direct-heating baking equipment uses a sunken plunger-type burner. During baking, the flame is directly sprayed onto the bottom of the ladle for effective heating, reducing the temperature difference between the ladle bottom and the ladle lining. At the same time, an annular baffle is set up. When the baking cover moves up to heat the ladle lining, the annular baffle shields the gap between the baking cover and the ladle, reducing heat loss at the gap. In addition, the equipment uses flue gas to preheat the fuel and the baking cover to preheat the oxygen, effectively saving energy.

[0027] The parts not disclosed in this utility model are all prior art, and their specific structures, materials, and working principles will not be described in detail. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A direct-heating energy-saving baking device for the bottom of a steel ladle, comprising a support assembly and a baking assembly, characterized in that: The baking assembly is installed on the upper side of the support assembly. The baking assembly includes a baking cover (5). A plunger-type burner (6) is installed in the middle of the lower side of the baking cover (5). A fuel pipe (7) communicating with the inner cavity of the plunger-type burner (6) is installed on the upper side of the baking cover (5). An exhaust pipe (8) is installed on the side of the baking cover (5). A heat exchange assembly is provided on the upper side of the baking cover (5) near the exhaust pipe (8) and the fuel pipe (7). A preheating pipe (11) is installed inside the baking cover (5). The preheating pipe (11) is coiled. An air inlet pipe (10) located on the upper side of the baking cover (5) is installed at one end of the preheating pipe (11). An air jet pipe (12) located on the lower side of the baking cover (5) is installed at the other end of the preheating pipe (11). An annular protective structure is provided on the side of the baking cover (5).

2. The energy-saving baking equipment for direct drying of the bottom of a steel ladle according to claim 1, characterized in that: The annular protective structure includes an annular barrier (13) fixed to the edge of the baking cover (5), and the annular barrier (13) is located on the underside of the baking cover (5).

3. The energy-saving baking equipment for direct drying of the bottom of a steel ladle according to claim 2, characterized in that: An annular liner (14) is fixed inside the annular enclosure (13), and the annular liner (14) is made of a high-temperature resistant flame-retardant material.

4. The energy-saving baking equipment for direct drying of the bottom of a steel ladle according to claim 1, characterized in that: The heat exchange assembly includes a heat exchange box (9) installed on the upper side of the baking cover (5), and the exhaust pipe (8) and fuel pipe (7) are both located inside the heat exchange box (9).

5. The energy-saving baking equipment for direct drying of the bottom of a steel ladle according to claim 1, characterized in that: The baking cover (5) includes a load-bearing plate (51), an insulation plate (52) is installed on the upper side of the load-bearing plate (51), a flame-retardant inner lining plate (53) is installed on the lower side of the load-bearing plate (51), and the preheating pipe (11) is located inside the flame-retardant inner lining plate (53).

6. The energy-saving baking equipment for direct drying of the bottom of a steel ladle according to claim 1, characterized in that: The support assembly includes a base (1), a positioning frame (2) is fixedly installed on the base (1), a connecting frame (3) is slidably arranged on the positioning frame (2), a guide frame (4) is fixed at one end of the connecting frame (3) near the positioning frame (2), and the connecting frame (3) is slidably connected to the positioning frame (2) through the guide frame (4).

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