CN219689759U

CN219689759U - Top combustion type hot air outlet damage repair structure of hot air furnace

Info

Publication number: CN219689759U
Application number: CN202321350748.5U
Authority: CN
Inventors: 王新秀
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-05-21
Filing date: 2023-05-21
Publication date: 2023-09-15
Anticipated expiration: 2033-05-21

Abstract

The utility model discloses a damaged repairing structure of a hot air outlet of a top-combustion type hot air furnace, which is invented for solving the problem of repairing and utilizing the wall body of the hot air outlet of the existing top-combustion type hot air furnace after collapsing. The method is characterized in that: re-building a refractory brick wall by adopting refractory bricks on a damaged indoor wall, pouring a high-strength refractory material between the newly-built refractory brick wall and a furnace shell to form a pouring repair area, and repairing and building the inner wall of the hot air outlet by adopting refractory combined bricks; the newly built refractory brick wall is tightly combined with the original large wall bricks, and the periphery of the pouring repair area is tightly combined with the original wall heat-insulating bricks. The utility model not only reduces the repair scale, but also enables the hot air outlet to recover the stable structure and ensure the operation to be reliable by updating and repairing the damaged and dismantled part of the wall body, thereby prolonging the service life of the hot air furnace, and having the advantages of small engineering quantity, short construction period, investment saving and the like.

Description

Top combustion type hot air outlet damage repair structure of hot air furnace

Technical field:

the utility model belongs to the technical field of top-combustion type hot blast stoves in the blast furnace ironmaking industry, and particularly relates to a repairing structure for a damaged hot blast outlet of a top-combustion type hot blast stove.

The background technology is as follows:

at present, the top combustion type hot blast stove is widely applied in the field of blast furnace ironmaking, and has the advantages of compact structure, high wind temperature, investment saving and the like. The hot air outlet of the hot air furnace is arranged at the upper part of the regenerator, the actual flow velocity is higher when hot air flows out, and the structure of the hot air outlet is unstable after long-term flushing, so that the local brick falling is caused, and even the damage conditions such as furnace wall slump and the like are caused. According to incomplete statistics, the situation that the hot air outlets of different degrees are damaged after more than half of domestic top-combustion hot air furnaces are put into production for ten years can appear, so that the normal operation of the hot air furnaces is seriously influenced. In order to repair damaged hot air outlets, two main remedy modes are adopted in China: 1. and repairing the vault as it is, namely dismantling and re-building nearly kilotons of refractory materials of the vault above the hot air outlet. 2. And (3) the vault is reformed, namely the steel shell and refractory materials of the vault above the hot air outlet are all removed, an independent supporting steel structure is arranged, and the vault furnace shell is replaced, so that the vault brickwork is independent of the lower large wall. The obvious drawbacks common to both remedies are: the method has the advantages of large repair and reconstruction engineering quantity, long construction period, high investment cost and necessarily low economic benefit.

The utility model comprises the following steps:

the utility model aims to provide an accurate repairing structure for the damaged hot air outlet of the top-combustion hot air furnace, aiming at the defects, and the structure can recover the normal use of the hot air furnace without carrying out large engineering treatment on the damaged part. Meanwhile, the method has the advantages of small engineering amount, short construction period, investment saving, reliable operation and the like.

The technical proposal is as follows: a hot air outlet damage repair structure of a top combustion type hot air furnace is characterized in that: and (3) re-building a refractory brick wall on the damaged wall body in the furnace body, pouring a high-strength refractory material between the newly-built refractory brick wall and the furnace shell to form a pouring repair area, and repairing and building the wall body in the hot air outlet 1 by adopting a refractory combined brick.

The fire-resistant brick wall is built on the wall body in the furnace body by adopting wall body refractory bricks, the re-built fire-resistant brick wall is in a triangular or trapezoid shape, and the periphery of the repaired fire-resistant brick wall is tightly combined with the original large wall bricks.

The high-strength refractory material is adopted between the newly built refractory brick wall and the furnace shell to form a pouring repair area, the pouring repair area is in a semi-annular or fan-shaped pattern, and the periphery of the pouring repair area is tightly combined with the original wall body insulating bricks.

In addition, the original moisturizing bricks, the heat-preserving rock wool and the furnace shell spray paint are reserved between the wall body and the furnace shell in the area outside the pouring repair area. The whole repairing area is the damaged part of the combined brick of the hot air outlet and the surrounding wall body.

Compared with the prior art, the utility model has the following beneficial effects:

1. because the damaged part of the hot air outlet is mainly concentrated on the hot air outlet combined brick and the hot air furnace large wall at the upper part of the hot air outlet, the utility model only adopts local repair, namely, the original appearance and function of the damaged part are recovered by means of leak detection, defect repair, disassembly, repair and the like, thus the vault is not required to be renovated, the furnace shell is not required to be replaced, the natural engineering quantity is small, the construction period is short, the investment is small, and the effect is high.

2. Because the repairing structure only aims at cleaning and dismantling the wall body of the collapse part, the original wall body brickwork with good stability is reserved, so that most of the existing wall bodies are reused, and the repairing scale is reduced; the implementation method can be realized by adopting the conventional brickwork and pouring means, so that the technology is simple, the operation is easy, the implementation is facilitated, and the popularization is convenient.

3. The repairing mode is that the inner wall of the furnace body is built by adopting wall body refractory bricks, and a high-strength refractory material is used for pouring between the newly built refractory brick wall and the furnace shell, so that the pouring material and the refractory bricks are bonded together, and the overall strength of the repaired wall body is increased; the outer edge of the whole repaired wall body, namely the outer edge of the refractory brick wall or the outer edge of the pouring material area can be tightly combined with the contact surface of the original wall body, so that the newly repaired wall body and the original wall body are combined into a whole, the stability of the hot air outlet area of the hot air furnace after repair is naturally enhanced, and the purpose of reliable operation is realized.

4. The third point characteristic, namely that the newly built refractory brick wall and the newly poured high-strength refractory material area have tight adhesion, so that the refractory bricks can be firmly adhered and are not easy to fall off; and because the refractory brick has good refractory property, cracks, deformation and wall peeling are not easy to occur in a high-temperature working environment, so that the service life of the hot air outlet of the hot air furnace can be ensured.

5. The structure only uses refractory pouring materials in a local range, and the refractory material layer at the hot air outlet has enough thickness, so that the temperature of the furnace shell is not increased outside the furnace; in the furnace, even if the refractory bricks fall off after long-term use, the refractory casting material can bear the scouring of high-temperature environment and high-speed air flow, and the overall service life of the hot air outlet of the hot air furnace can be prolonged only by the refractory casting material.

6. Because the whole repair area of the structure is the damaged part of the combined brick of the hot air outlet and the wall body around the combined brick. So that the method has great flexibility in production practice. If the method is not inexhaustible, the repair is not needed until the hot air outlet cannot be used at all, but the best repair time is grasped, so that the repair area is reduced, wherein the repair area comprises a refractory brick layer in the furnace and a pouring layer between refractory bricks and a furnace shell, and the refractory brick layer and the furnace shell can be flexibly treated according to the actual slump condition of the original wall body, for example, the newly built refractory brick wall is triangular or trapezoidal, and the pouring area is semicircular or fan-shaped, and the like, and is related to the space area to be repaired, which is cleaned by the slump wall, so that the method has wide applicability to the damage repair condition of the hot air outlet of the hot air furnace.

Description of the drawings:

FIG. 1 is a schematic view of the hot air outlet portion of the stove according to the present utility model.

Fig. 2 is a right side view of fig. 1, taken along A-A.

Fig. 3 is a right side view of fig. 1 taken along B-B.

Reference numerals: the hot air outlet 1, a furnace body inner wall body 2, a furnace shell 3, wall refractory bricks 4, a pouring repair area 5, original wall heat-insulating bricks 6, repaired refractory brick walls 7, original large wall bricks 8 and refractory combined bricks 9.

The specific embodiment is as follows:

the present utility model will be described in detail with reference to the accompanying drawings.

As shown in fig. 1, the utility model provides a damaged repair structure for a hot air outlet of a top-combustion hot air furnace, wherein the whole working surface of the structure is positioned at damaged parts of a combined brick of the hot air outlet 1 and a wall body around the combined brick. According to the damage condition of the hot air outlet part of the hot air furnace, the following treatment is carried out on the damaged part: firstly, in the aspect of a furnace body, a refractory brick wall is built again from bottom to top in a wall body inner wall body 2 by adopting wall refractory bricks 4, and then a casting repair area 5 is formed by casting high-strength refractory materials in a space between the newly built refractory brick wall and a furnace shell 3; and then, in the aspect of a hot air outlet, the inner wall of the hot air outlet 1 is subjected to masonry repair by adopting the fireproof combined bricks 9.

As shown in FIG. 2, the repaired refractory brick wall 7 which is formed by repairing and building the wall body refractory bricks 4 on the wall body 2 in the furnace body is in a triangular shape; of course, if the broken wall space is actually cleaned and removed, the newly built repaired refractory brick wall 7 can also be in a trapezoid shape. However, the newly built refractory brick wall, no matter what shape the edge is, has to be tightly combined with the original refractory large wall brick 8.

As shown in fig. 3, it is shown here that the poured repair zone 5, which is poured with high-strength refractory material between the refractory brick wall and the furnace shell 3, takes on a semi-annular pattern; of course, if the damaged space at the two ends of the vertical center line of the hot air outlet is positioned upwards according to the actually cleaned and removed damaged wall space, the pouring repair area 5 can also be in a fan-shaped form; the part to be repaired outside the pouring repair area 5 is naturally filled with materials such as wall insulating bricks 6. However, no matter what shape the periphery of the pouring repair area 5 takes, the pouring repair area needs to be tightly combined with the original wall insulation bricks 6.

The implementation process of the utility model is generally as follows: the wall body supporting frame is utilized to effectively support the existing relatively stable large wall brick lining of the hot air outlet; cleaning the fallen and collapsed wall residues, and dismantling the damaged hot air outlet combined bricks; then, the space to be compensated is subjected to material updating and deficiency, wherein the method mainly comprises the steps of building a refractory large wall in a furnace body according to a hot air outlet combined brick with high stability, and pouring a high-strength refractory material between the refractory large wall and a furnace shell; finally, after the refractory pouring material is solidified, the refractory bricks, the insulating bricks and other insulating materials such as the insulating rock wool are continuously built until the repairing wall body and the original wall body are integrated into a whole, so that the whole repairing structure is realized.

The utility model can be widely applied to the damage repair and utilization of the hot air outlet of the top combustion type hot air furnace in the blast furnace ironmaking industry.

Claims

1. A hot air outlet damage repair structure of a top combustion type hot air furnace is characterized in that: the method comprises the steps of re-building a refractory brick wall on a damaged furnace body inner wall (2) by adopting wall refractory bricks (4), pouring a pouring repair area (5) between the newly-built refractory brick wall and a furnace shell (3) by adopting high-strength refractory materials, and repairing and building the inner wall of a hot air outlet (1) by adopting refractory composite bricks (9).

2. The top-fired hot blast stove hot blast outlet damage repair structure according to claim 1, characterized in that: the refractory brick wall is built on the inner wall body (2) of the furnace body by adopting wall refractory bricks (4), the reconstructed refractory brick wall (7) is triangular or trapezoidal, and the periphery of the reconstructed refractory brick wall (7) is tightly combined with the original large wall bricks (8).

3. The top-fired hot blast stove hot blast outlet damage repair structure according to claim 1 or 2, characterized in that: the high-strength refractory material is adopted between the newly built refractory brick wall and the furnace shell (3) to cast a casting repair area (5), the casting repair area (5) is in a semi-annular or fan-shaped pattern, and the periphery of the casting repair area (5) is tightly combined with the original wall insulating bricks (6).

4. A top-firing stove hot blast outlet damage repair structure according to claim 3, characterized in that: and retaining the original insulating bricks, insulating rock wool and furnace shell spray paint between the wall body and the furnace shell (3) in the area outside the pouring repair area (5).

5. The top-fired hot blast stove hot blast outlet damage repair structure according to claim 1, characterized in that: the whole repairing area is the damaged part of the combined brick of the hot air outlet (1) and the wall around the combined brick.