Furnace shell reinforcing device

Abstract

The utility model relates to a furnace shell reinforcing device, which can effectively solve the problem that the normal operation of a hot blast stove and the safety production of a blast furnace are seriously influenced due to frequent cracking of a furnace shell of the hot blast stove, and adopts the technical scheme that the furnace shell reinforcing device comprises a reinforcing flat plate, a reinforcing flat plate and a reinforcing vertical plate, second reinforcing flat plates are installed on the straight section part of the lower portion of the furnace shell vault around the outer wall by a circle, first reinforcing flat plates are installed on the straight section part between the second reinforcing flat plates around the outer wall by a circle, a plurality of reinforcing rib plates are longitudinally arranged on the second reinforcing flat plates, and a plurality of reinforcing vertical plates are installed between the second reinforcing flat plates around the outer wall by a circle. The ring steel plate is adopted for reinforcement, the problem that a high-temperature area of the furnace shell is prone to cracking due to the fact that the design thickness of the furnace shell of the hot-blast stove is small is effectively solved, stable operation under the high-temperature and high-pressure working conditions of original design can be met after reinforcement, and the device is an innovation of a hot-blast stove shell reinforcement device.

Description

Technical Field

[0001] The utility model relates to the field of hot blast furnaces, in particular to a furnace shell reinforcement device. Background Art

[0002] At present, the shell of the hot blast furnace supporting the large blast furnace in the iron-making plant is frequently cracked, which seriously affects the normal operation of the hot blast furnace and the safe production of the blast furnace. The cracked parts of the shell are all in the high-temperature area in the middle of the hot blast furnace. Taking the small hat top-fired hot blast furnace as an example, the cracked parts are all at the hot blast outlet and the cone arch. The thickness of the conventional hot blast furnace shell is calculated with reference to the "Technical Standard for the Structure of Ironmaking Process Furnace Shell". The calculation formula for the cone arch is: t=2.20D+2. The hot blast furnace is a pressure vessel, and this formula is not applicable to pressure vessels. According to the calculation specifications for pressure vessels, the thickness of the pressure vessel steel shell needs to be calculated in combination with pressure, allowable stress, weld coefficient, angle coefficient, etc.

[0003] The shell of the hot blast furnace is designed to be thin, and when it is operated under high temperature and high pressure conditions, it is easy to cause cracks in the high temperature area of ​​the shell. The solution is to replace the damaged shell or reinforce the shell. Therefore, it is imperative to invent a shell reinforcement device. Summary of the invention

[0004] In view of the above situation, in order to solve the defects of the prior art, the purpose of the utility model is to provide a furnace shell reinforcement device, which can effectively solve the problem of frequent cracking of the hot blast furnace shell, which seriously affects the normal operation of the hot blast furnace and the safe production of the blast furnace.

[0005] The technical solution solved by the utility model is to include a reinforcing plate, a reinforcing plate and a reinforcing vertical plate. A first reinforcing plate is installed around the outer wall on the top arch of the furnace shell, a second reinforcing plate is installed around the outer wall on the straight section at the lower part of the furnace shell arch, a first reinforcing plate is installed around the outer wall on the straight section between the second reinforcing plates, a plurality of reinforcing ribs are longitudinally arranged on the second reinforcing plate, a plurality of reinforcing vertical plates are installed around the outer wall between the second reinforcing plates, a second reinforcing plate is installed around the outer wall on the inward section below the straight section and a plurality of reinforcing vertical plates are installed around the outer wall on the outward expansion section below the inward section, a hot air outlet clamp is installed around the outer wall at the connection between the end of the outward expansion section and the straight section with a hot air outlet below and at the connection between the straight section below the hot air outlet and the contraction section, and the second reinforcing plate and the first reinforcing plate are installed in sequence from top to bottom on the contraction section.

[0006] The utility model has novel structure, reasonable design and good use effect. It adopts ring steel plates for reinforcement. Starting from the high temperature section of the hot blast furnace, a ring plate is arranged at a certain height. It effectively solves the problem that the high temperature area of ​​the furnace shell of the hot blast furnace is easily cracked due to the thin design thickness when operating under high temperature and high pressure conditions. After reinforcement, it can meet the stable operation under the original design high temperature and high pressure conditions. It is an innovation in the hot blast furnace shell reinforcement device. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0008] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings.

[0009] Depend on Figure 1 The utility model includes a reinforcing plate, a reinforcing plate and a reinforcing vertical plate. A first reinforcing plate 2-1 is installed around the outer wall on the top arch of the furnace shell 1, a second reinforcing plate 2-2 is installed around the outer wall on the straight section at the bottom of the furnace shell arch, a first reinforcing plate 2-1 is installed around the outer wall on the straight section between the second reinforcing plates 2-2, a plurality of reinforcing ribs 4 are longitudinally arranged on the second reinforcing plate 2-2, a plurality of reinforcing vertical plates 5 are installed around the outer wall between the second reinforcing plates 2-2, a second reinforcing plate 2-2 is installed around the outer wall on the inward section below the straight section and on the outward section below the inward section, a hot air outlet clamp 3 is installed around the outer wall at the connection between the end of the outward section and the straight section with a hot air outlet below and at the connection between the straight section below the hot air outlet 6 and the contraction section, and the second reinforcing plate 2-2 and the first reinforcing plate 2-1 are installed in sequence from top to bottom.

[0010] In order to ensure the use effect, the reinforcing ribs 4 are arranged at equal intervals on the second reinforcing flat plate 2-2.

[0011] The reinforcement upright plates 5 are installed between the second reinforcement flat plates 2 - 2 at equal intervals.

[0012] A plurality of reinforcing plates 5 are installed at equal intervals between the hot air outlet clamps 3 around the outer wall.

[0013] A first reinforcing plate 2 - 1 is installed on the furnace shell between the hot air outlet hoops 3 .

[0014] The distance between the first reinforcement plate 2 - 1 and the two hot air outlet hoops 3 is the same.

[0015] The second reinforcement plate 2-2 is wider than the first reinforcement plate 2-1.

[0016] The position of the second reinforcement plate 2-2 matches the position of the welds at the connection points of the furnace shell sections.

[0017] The usage of the utility model is that the utility model verifies whether the thickness of the existing hot blast furnace shell meets the calculated thickness of the pressure vessel according to the original hot blast furnace design parameters, and then determines the final reinforcement form according to the calculated thickness and the existing thickness error value. The hot blast furnace shell is reinforced with ring steel plates. Starting from the high-temperature section of the hot blast furnace, a ring plate is set at every height. The original furnace shell annular weld needs to add upper and lower ring plates and rib plates, and a hoop is set at the hot air outlet. After the hot blast furnace is reinforced, it can meet the original design high temperature and high pressure working conditions for stable operation.

[0018] The utility model has a novel structure and a reasonable design. It adopts ring steel plates for reinforcement. Starting from the high-temperature section of the hot blast furnace, a ring plate is arranged at every height, and a clamp is arranged at the hot blast outlet. After the hot blast furnace is reinforced, it can meet the stable operation under the high-temperature and high-pressure working conditions of the original design. It is an innovation in the hot blast furnace shell reinforcement device and has good economic and social benefits.

[0019] It should be pointed out that the above is only a preferred embodiment of the utility model, and does not impose any form of limitation on the utility model. Any technician familiar with the profession can use the technical content disclosed above to make changes or modify it into an equivalent embodiment with equivalent changes without departing from the scope of the technical solution of the utility model, which all fall within the protection scope of the utility model.

Claims

1. A furnace shell reinforcement device, characterized in that: The invention comprises a reinforcing plate, a reinforcing plate and a reinforcing vertical plate, wherein a first reinforcing plate (2-1) is installed around the outer wall of the top arch of the furnace shell (1), a second reinforcing plate (2-2) is installed around the outer wall of the straight section at the bottom of the furnace shell arch, the first reinforcing plate (2-1) is installed around the outer wall of the straight section between the second reinforcing plates (2-2), a plurality of reinforcing ribs (4) are longitudinally arranged on the second reinforcing plates (2-2), and a plurality of reinforcing ribs (4) are installed around the outer wall between the second reinforcing plates (2-2). A plurality of reinforcing vertical plates (5) are installed around the periphery; a second reinforcing flat plate (2-2) is installed around the outer wall at the inward section below the straight section and around the outer wall at the outward expansion section below the inward section; a hot air outlet clamp (3) is installed around the outer wall at the connection between the end of the outward expansion section and the straight section with a hot air outlet provided below and around the outer wall at the connection between the straight section and the contraction section below the hot air outlet (6); and the contraction section is installed with the second reinforcing flat plate (2-2) and the first reinforcing flat plate (2-1) in sequence from top to bottom.

2. The furnace shell reinforcement device according to claim 1, characterized in that: The reinforcing rib plates (4) are arranged at equal intervals on the second reinforcing flat plate (2-2).

3. The furnace shell reinforcement device according to claim 1, characterized in that: The reinforcing upright plates (5) are installed at equal intervals between the second reinforcing flat plates (2-2).

4. The furnace shell reinforcement device according to claim 1, characterized in that: A plurality of reinforcing vertical plates (5) are installed at equal intervals around the outer wall between the hot air outlet clamps (3).

5. The furnace shell reinforcement device according to claim 1, characterized in that: A first reinforcement plate (2-1) is installed on the furnace shell between the hot air outlet clamps (3).

6. The furnace shell reinforcement device according to claim 1, characterized in that: The distance between the first reinforcement plate (2-1) and the two hot air outlet clamps (3) is the same.

7. The furnace shell reinforcement device according to claim 1, characterized in that: The second reinforcement plate (2-2) is wider than the first reinforcement plate (2-1).

8. The furnace shell reinforcement device according to claim 1, characterized in that: The position of the second reinforcement plate (2-2) matches the position of the welds at the connection points of the furnace shell sections.

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