Flue structure of refining furnace cover

Abstract

A flue structure of a refining furnace cover comprises a furnace cover body. The water cooling pipeline assembly is coiled on the furnace cover body, and the water cooling pipeline assembly is connected with a water inlet pipeline and a water return pipeline; the flue mechanism is arranged on the furnace cover body and comprises a main smoke exhaust assembly, a secondary smoke exhaust assembly and a smoke outlet fixing support; the main smoke exhaust assembly is provided with a first smoke inlet main port and a smoke exhaust main port; the secondary smoke exhaust assembly is provided with a first secondary smoke inlet port and a secondary smoke exhaust port; the main smoke exhaust port and the secondary smoke exhaust port are fixed to the smoke exhaust port fixing support, a flue gap is formed between the main smoke exhaust port and the secondary smoke exhaust port, and at least part of the water cooling pipeline assembly extends into the flue gap and is tightly attached to the inverted-L-shaped smoke exhaust section and the horizontal smoke exhaust section. The smoke outlet fixing support provides good structural support, and the smoke outlet fixing support and the smoke outlet fixing support are close in position, so that butt joint of an external smoke suction assembly (for example, butt joint to the same suction ventilator) is facilitated, and the smoke exhaust speed is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical equipment, in particular to a flue structure of a refining furnace cover. Background Art

[0002] A refining furnace is a type of refining equipment used in steel production, primarily for removing impurities from molten steel and adjusting its composition to improve its quality. The refining furnace cover is a component of the furnace, covering the roof and controlling the reaction environment. The cover is a protective component within the LF refining furnace's power-up mechanism, preventing slag from scattering when struck by the electrode arc during power-up. The cover and the ladle form a sealed reaction chamber, effectively preventing air from contacting the molten steel and potentially increasing oxygen and nitrogen.

[0003] Refining furnace cover generally refers to the components used in industry to cover the refining furnace, which can help control the temperature and gas flow to ensure the efficient conduct of the reaction in the furnace.

[0004] The flue is one of the core design structures of the refining furnace cover, and usually includes the following aspects: 1. Smoke exhaust efficiency: The flue design should ensure the effective removal of smoke and exhaust gas generated in the furnace to maintain a good working environment. 2. Temperature control: The size and shape of the flue should be able to effectively control the temperature distribution in the furnace to ensure the stability and efficiency of the reaction process. 3. Gas flow: The design should consider the flow of gas in the flue to maximize the heat and mass transfer and improve the refining effect. 4. High temperature resistance: The material selection and structural design should be able to withstand long-term use in high temperature environments to ensure the stability and durability of the flue. 5. Cleaning and maintenance: The design should facilitate cleaning and maintenance to ensure that the flue operates effectively and unhindered for a long time.

[0005] Prior art example 1, referring to patent document CN106247801A, provides a water-cooled furnace cover of a ladle refining furnace, comprising: a refractory center piece, an upper clamp-shaped cover, a ventilation and dust removal duct soft connection device, a ventilation and dust removal duct and a furnace cover body, wherein the refractory center piece is arranged on the furnace cover body, the clamp-shaped opening end of the upper clamp-shaped cover is used to collect smoke at the refractory center piece, the furnace cover body includes a lower flue, and the smoke outlet end of the upper clamp-shaped cover and the smoke outlet end of the lower flue are both connected to the ventilation and dust removal duct through the ventilation and dust removal duct soft connection device.

[0006] Prior art example 2, referring to patent document CN220352169U, discloses an LF refining furnace cover sealing port electrode buffer device, relating to the field of steel metallurgy technology, which includes an outer ring, an inner ring, an elastic part, an upper limit slag stop ring and a lower limit slag stop ring, the outer ring and the inner ring are installed in the electrode socket of the furnace cover sealing port end cover, the outer ring is fixedly connected to the hole wall of the electrode socket, the inner ring is in direct contact with the electrode, and the inner ring is connected to the outer ring through an elastic part; the outer ring and the inner ring are arranged between the upper limit slag stop ring and the lower limit slag stop ring, the upper limit slag stop ring and the lower limit slag stop ring are coaxially arranged, the two ends of the inner ring are respectively fixedly connected to the inner edges of the upper limit slag stop ring and the lower limit slag stop ring, and the outer ring is gap-fitted with the upper limit slag stop ring and the lower limit slag stop ring.

[0007] In summary, in Example 1, Example 2 and other prior arts, the flue design is too simple and does not have multiple smoke inlets, resulting in a slow smoke exhaust rate, so that high-temperature gas accumulates for a long time, which is not conducive to overall temperature control and thus affects the overall use effect. Summary of the Invention

[0008] In order to overcome the above-mentioned deficiencies in the prior art, the utility model provides a flue structure for a refining furnace cover.

[0009] The utility model solves the technical problem with a technical solution of: a flue structure of a refining furnace cover, comprising:

[0010] The furnace cover body is cylindrical;

[0011] A water-cooling pipe assembly is coiled on the furnace cover body, and the water-cooling pipe assembly is connected to a water inlet pipe and a water return pipe;

[0012] A flue mechanism, which is arranged on the furnace cover body;

[0013] The flue mechanism includes a main smoke exhaust component, a secondary smoke exhaust component and a smoke exhaust port fixing bracket;

[0014] The main smoke exhaust assembly is provided with a first vertical section, a horizontal arc section, a second vertical section and a horizontal smoke exhaust section in sequence according to the flow direction;

[0015] The lower end of the first vertical section is provided with a first main smoke inlet port, and the outer end of the horizontal smoke exhaust section is provided with a main smoke exhaust port;

[0016] The secondary smoke exhaust assembly includes an inverted "L"-shaped smoke exhaust section, the lower end of the inverted "L"-shaped smoke exhaust section is provided with a first smoke inlet secondary port, and the upper end of the inverted "L"-shaped smoke exhaust section is provided with a smoke exhaust secondary port;

[0017] The main smoke exhaust port and the secondary smoke exhaust port are respectively fixed on the smoke exhaust port fixing bracket, and a flue gap is formed between the inverted "L"-shaped smoke exhaust section and the horizontal smoke exhaust section. The water-cooling pipe assembly at least partially extends into the flue gap and is close to the inverted "L"-shaped smoke exhaust section and the horizontal smoke exhaust section.

[0018] Preferably, the water-cooling pipe assembly is at least partially placed on the smoke exhaust port fixing bracket.

[0019] In some preferred embodiments of the present invention, the main smoke exhaust assembly further includes a manifold section, the lower end of the manifold section is provided with a second main smoke inlet port, and the upper end of the manifold section is docked with and connected to the horizontal arc section.

[0020] Furthermore, the secondary smoke exhaust assembly also includes a vertical arc section, the lower end of the vertical arc section is provided with a second secondary smoke inlet port, and the upper end of the vertical arc section is connected to and communicated with the inverted "L"-shaped smoke exhaust section.

[0021] Preferably, the first main smoke inlet port, the second main smoke inlet port, the first secondary smoke inlet port, and the second secondary smoke inlet port are sequentially arranged along a ring.

[0022] In some preferred embodiments of the present invention, the water-cooling pipe assembly includes a pipe body and a pipe mounting bracket, the pipe mounting bracket is fixedly connected to the furnace cover body, and the pipe body rests against the pipe mounting bracket in sequence.

[0023] Furthermore, a positioning notch is provided on the pipe mounting bracket, and the flue mechanism is at least partially inserted into the positioning notch to form a position-limiting and anti-slip fit.

[0024] Furthermore, a plurality of supporting ribs are provided on the inner end surface of the smoke exhaust port fixing bracket, and the supporting ribs are respectively against the water cooling pipe assembly, the inverted "L"-shaped smoke exhaust section and the horizontal smoke exhaust section.

[0025] Preferably, there are two groups of water inlet pipes and two groups of water return pipes.

[0026] In the present invention, a plurality of electrode insertion holes are provided at the center of the furnace cover body, and the water-cooling pipe assembly is provided around the circumference of the electrode insertion holes.

[0027] The beneficial effects of the present invention are:

[0028] 1. Both the main exhaust port and the secondary exhaust port are fixed on the exhaust port fixing bracket. The exhaust port fixing bracket provides good structural support, and the two are close in position, which is conducive to docking with external smoking components (such as docking to the same suction fan), thereby accelerating the speed of smoke exhaust.

[0029] 2. The water-cooling pipe assembly is close to the inverted "L"-shaped smoke exhaust section and the horizontal smoke exhaust section, which can play an effective temperature control role, so that the target smoke can be effectively discharged from the main smoke exhaust port and the secondary smoke exhaust port. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of the utility model in the main viewing direction.

[0031] Figure 2 It is a structural schematic diagram of the utility model when viewed from the left.

[0032] Figure 3 It is a structural schematic diagram of the utility model in the rear view direction.

[0033] Figure 4 It is a structural schematic diagram of the utility model as viewed from the right.

[0034] Figure 5 It is a schematic structural diagram of the utility model when viewed from above.

[0035] Figure 6 It is a structural diagram of the flue mechanism in the main viewing direction.

[0036] Figure 7 It is a structural diagram of the flue mechanism as viewed from the side.

[0037] Figure 8 It is a structural diagram of the flue mechanism as seen from the rear.

[0038] In the figure: 1. furnace cover body; 11. electrode insertion hole; 2. water-cooling pipe assembly; 21. water inlet pipe; 22. return water pipe; 23. pipe body; 24. pipe mounting bracket; 241. positioning notch; 3. flue mechanism; 4. main smoke exhaust assembly; 41. first vertical section; 411. first smoke inlet main port; 42. horizontal arc section; 43. second vertical section; 44. horizontal smoke exhaust section; 441. smoke exhaust main port; 45. manifold section; 451. second smoke inlet main port; 5. secondary smoke exhaust assembly; 51. inverted "L"-shaped smoke exhaust section; 511. first smoke inlet secondary port; 512. smoke exhaust secondary port; 513. flue gap; 52. vertical arc section; 521. second smoke inlet secondary port; 6. smoke exhaust port fixing bracket; 61. supporting rib. DETAILED DESCRIPTION

[0039] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments are merely a specific description of the present invention, and their purpose is to allow those skilled in the art to better understand the technical solution of the present invention, and should not be regarded as limiting the present invention.

[0040] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", and "outside" are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0041] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0042] Example 1

[0043] Reference Figures 1 to 8 A flue structure of a refining furnace cover includes: a furnace cover body 1, which is cylindrical; a water-cooling pipe assembly 2, which is coiled on the furnace cover body 1, and the water-cooling pipe assembly 2 is connected to a water inlet pipe 21 and a water return pipe 22; a flue mechanism 3, which is arranged on the furnace cover body 1;

[0044] It is worth mentioning that the flue mechanism 3 includes a main exhaust assembly 4, a secondary exhaust assembly 5 and a smoke exhaust port fixing bracket 6; the main exhaust assembly 4 is provided with a first vertical section 41, a horizontal arc section 42, a second vertical section 43 and a horizontal exhaust section 44 in sequence according to the flow direction; the lower end of the first vertical section 41 is provided with a first smoke inlet main port 411, and the outer end of the horizontal exhaust section 44 is provided with a smoke exhaust main port 441; the secondary exhaust assembly 5 includes an inverted "L"-shaped exhaust section 51, the inverted The lower end of the "L"-shaped smoke exhaust section 51 is provided with a first smoke inlet secondary port 511, and the upper end of the inverted "L"-shaped smoke exhaust section 51 is provided with a smoke exhaust secondary port 512; the smoke exhaust main port 441 and the smoke exhaust secondary port 512 are respectively fixed on the smoke exhaust port fixing bracket 6, and a flue gap 513 is formed between the inverted "L"-shaped smoke exhaust section 51 and the horizontal smoke exhaust section 44, and the water-cooling pipe assembly 2 at least partially extends into the flue gap 513 and is close to the inverted "L"-shaped smoke exhaust section 51 and the horizontal smoke exhaust section 44.

[0045] The above is the basic structural scheme of the present invention, which utilizes a combination of a primary smoke exhaust assembly 4 and a secondary smoke exhaust assembly 5 to form a dual-path smoke exhaust channel. During operation, smoke from the refining tower enters the first vertical section 41 through the first primary smoke inlet port 411, flows along the horizontal arc section 42, the second vertical section 43, and the horizontal smoke exhaust section 44, and is discharged from the primary smoke exhaust port 441. Meanwhile, smoke from the refining tower enters the inverted L-shaped smoke exhaust section 51 through the first secondary smoke inlet port 511, passes through the inverted L-shaped smoke exhaust section 51, and is discharged from the secondary smoke exhaust port 512.

[0046] It's worth noting that both the main exhaust port 441 and the secondary exhaust port 512 are fixed to the exhaust port bracket 6, providing excellent structural support. Their proximity facilitates docking with external inhalation components (e.g., the same suction blower), thereby accelerating smoke exhaust. Furthermore, the water-cooling duct assembly 2, in close proximity to the inverted "L"-shaped exhaust section 51 and the horizontal exhaust section 44, provides effective temperature control, allowing the target smoke to be efficiently discharged from the main exhaust port 441 and the secondary exhaust port 512.

[0047] Preferably, the water-cooling pipe assembly 2 is at least partially placed on the smoke exhaust port fixing bracket 6 , so that the smoke exhaust port fixing bracket 6 can also support and stabilize part of the water-cooling pipe assembly 2 .

[0048] Preferably, two sets of inlet pipes 21 and return pipes 22 are provided, respectively, to increase the flow rate of water inlet and outlet, thereby improving water cooling efficiency. Furthermore, one or two sets of inlet pipes 21 and / or return pipes 22 can be selectively opened based on the real-time operating status of the refining tower, ensuring that the water-cooling pipe assembly 2 is always in optimal operating condition.

[0049] In the present invention, the center of the furnace cover body 1 is provided with a plurality of electrode insertion holes 11. The use of the electrode insertion holes 11 is consistent with the prior art and will not be described in detail here. Furthermore, the water-cooling pipe assembly 2 is provided around the electrode insertion holes 11, effectively cooling the area surrounding the electrode insertion holes 11 and preventing the high-temperature electrodes inserted therein from burning the furnace cover body 1.

[0050] Example 2

[0051] Based on the structure of the first embodiment, this embodiment provides a more preferred structural solution of the main smoke exhaust component 4 and the secondary smoke exhaust component 5, referring to Figures 6 to 8 , specifically:

[0052] 1. The main smoke exhaust assembly 4 further includes a manifold section 45 . A second main smoke inlet port 451 is provided at the lower end of the manifold section 45 , and the upper end of the manifold section 45 is connected to and communicates with the horizontal arc section 42 .

[0053] By setting up the manifold section 45, the main smoke exhaust component 4 has one more smoke inlet port (the second main smoke inlet port 451) and flow channel (manifold section 45), and shares the horizontal arc section 42 and the main smoke exhaust port 441, which can effectively increase the smoke intake of the main smoke exhaust component 4 and improve the smoke exhaust efficiency.

[0054] 2. The secondary smoke exhaust assembly 5 further includes a vertical arc section 52 , the lower end of which is provided with a second secondary smoke inlet port 521 , and the upper end of the vertical arc section 52 is connected to and communicates with the inverted “L”-shaped smoke exhaust section 51 .

[0055] By setting the vertical arc section 52, the secondary smoke exhaust component 5 has one more smoke inlet port (second smoke inlet secondary port 521) and flow channel (vertical arc section 52), and shares the horizontal arc section 42 and the smoke exhaust secondary port 512, which can effectively increase the smoke intake of the secondary smoke exhaust component 5 and improve the smoke exhaust efficiency.

[0056] Preferably, the first smoke inlet main port 411, the second smoke inlet main port 451, the first smoke inlet secondary port 511, and the second smoke inlet secondary port 521 are arranged in a ring in sequence, and preferably, adjacent ports are spaced about 90 degrees apart, so that the smoke and dust from each port can be more evenly inhaled into the main smoke exhaust component 4 and the secondary smoke exhaust component 5.

[0057] Example 3

[0058] Reference Figures 1 to 8 In some preferred embodiments of the present invention, the water-cooling pipe assembly 2 includes a pipe body 23 and a pipe mounting bracket 24. The pipe mounting bracket 24 is fixedly connected to the furnace cover body 1, and the pipe body 23 is sequentially abutted against the pipe mounting bracket 24 to provide good structural support, so that the pipe body 23 can be more stable and reliable.

[0059] Furthermore, a positioning notch 241 is provided on the pipe mounting bracket 24, and the flue mechanism 3 is at least partially inserted into the positioning notch 241 to form a position-limiting and anti-slip fit, that is, the pipe mounting bracket 24 can also provide good structural support for the flue mechanism 3.

[0060] Preferably, the inner end surface of the smoke exhaust vent fixing bracket 6 is provided with a plurality of support ribs 61, which respectively abut against the water-cooling pipe assembly 2, the inverted "L"-shaped smoke exhaust section 51, and the horizontal smoke exhaust section 44. The provision of the support ribs 61 makes the connection between the water-cooling pipe assembly 2, the inverted "L"-shaped smoke exhaust section 51, the horizontal smoke exhaust section 44, and the smoke exhaust vent fixing bracket 6 more stable and reliable.

[0061] It is worth noting that other technical solutions of the present invention belong to the existing technology and are therefore not described in detail.

[0062] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the concept of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A flue structure for a refining furnace cover, comprising: The furnace cover body (1) is cylindrical; A water-cooling pipe assembly (2) is wound on the furnace cover body (1), and the water-cooling pipe assembly (2) is connected to a water inlet pipe (21) and a water return pipe (22); A flue mechanism (3) is provided on the furnace cover body (1); Its characteristics are: The flue mechanism (3) comprises a main smoke exhaust component (4), a secondary smoke exhaust component (5) and a smoke exhaust port fixing bracket (6); The main smoke exhaust assembly (4) is provided with a first vertical section (41), a horizontal arc section (42), a second vertical section (43) and a horizontal smoke exhaust section (44) in sequence according to the flow direction; The lower end of the first vertical section (41) is provided with a first main smoke inlet port (411), and the outer end of the horizontal smoke exhaust section (44) is provided with a main smoke exhaust port (441); The secondary smoke exhaust assembly (5) comprises an inverted "L"-shaped smoke exhaust section (51), the lower end of the inverted "L"-shaped smoke exhaust section (51) is provided with a first smoke inlet secondary port (511), and the upper end of the inverted "L"-shaped smoke exhaust section (51) is provided with a smoke exhaust secondary port (512); The main smoke exhaust port (441) and the secondary smoke exhaust port (512) are respectively fixed on the smoke exhaust port fixing bracket (6), and a flue gap (513) is formed between the inverted "L"-shaped smoke exhaust section (51) and the horizontal smoke exhaust section (44). The water-cooling pipe assembly (2) at least partially extends into the flue gap (513) and is closely attached to the inverted "L"-shaped smoke exhaust section (51) and the horizontal smoke exhaust section (44).

2. The flue structure of the refining furnace cover according to claim 1, characterized in that: The water-cooling pipe assembly (2) is at least partially supported on the smoke exhaust port fixing bracket (6).

3. The flue structure of the refining furnace cover according to claim 1, characterized in that: The main smoke exhaust assembly (4) further comprises a manifold section (45), the lower end of the manifold section (45) is provided with a second main smoke inlet port (451), and the upper end of the manifold section (45) is docked with and communicated with the horizontal arc section (42).

4. The flue structure of the refining furnace cover according to claim 3, characterized in that: The secondary smoke exhaust assembly (5) further comprises a vertical circular arc section (52), the lower end of which is provided with a second secondary smoke inlet port (521), and the upper end of which is connected to and in communication with the inverted "L"-shaped smoke exhaust section (51).

5. The flue structure of the refining furnace cover according to claim 4, characterized in that: The first main smoke inlet port (411), the second main smoke inlet port (451), the first secondary smoke inlet port (511), and the second secondary smoke inlet port (521) are sequentially arranged along a ring.

6. The flue structure of the refining furnace cover according to claim 1, characterized in that: The water-cooling pipe assembly (2) includes a pipe body (23) and a pipe mounting bracket (24); the pipe mounting bracket (24) is fixedly connected to the furnace cover body (1), and the pipe body (23) rests against the pipe mounting bracket (24) in sequence.

7. The flue structure of the refining furnace cover according to claim 6, characterized in that: The pipe mounting bracket (24) is provided with a positioning notch (241), and the flue mechanism (3) is at least partially inserted into the positioning notch (241) to form a position-limiting and anti-dropping fit.

8. The flue structure of the refining furnace cover according to claim 1, characterized in that: The inner end surface of the smoke exhaust port fixing bracket (6) is provided with a plurality of supporting ribs (61), and the supporting ribs (61) are respectively opposed to the water cooling pipe assembly (2), the inverted "L"-shaped smoke exhaust section (51) and the horizontal smoke exhaust section (44).

9. The flue structure of the refining furnace cover according to claim 1, characterized in that: There are two groups of water inlet pipes (21) and water return pipes (22).

10. The flue structure of the refining furnace cover according to claim 1, characterized in that: A plurality of electrode insertion holes (11) are provided at the center of the furnace cover body (1), and the water cooling pipe assembly (2) is arranged around the circumference of the electrode insertion holes (11).

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