A hot blast stove having a multi-channel combined hot blast outlet

Abstract

The application discloses a hot blast stove with a multi-channel combined hot blast outlet. The hot blast outlet is arranged on a large wall of the hot blast stove, at least one middle support is arranged in the hot blast outlet, and the middle support separates the hot blast outlet into two or more hot blast channels. The application designs the traditional hot blast outlet as a multi-channel hot blast outlet, arranges the supports between the multi-hot blast channels, changes the traditional single large hot blast channel into multiple small hot blast channels, and arranges a catenary-shaped force component type interface structure at the interface between the inner ring working layer and the outer petal working layer. The load of the large wall of the hot blast stove above the hot blast outlet is transmitted to the large walls on both sides of the hot blast outlet through the outer petal working layer, and the load of the large wall of the hot blast stove borne by the inner ring working layer is reduced. The inner ring working layer protects the outer petal working layer from the impact of high-temperature hot air, and the outer petal working layer functions as a force component to avoid deformation and collapse of the inner ring working layer under the load of the large wall of the hot blast stove.

Description

Technical Field

[0001] The invention relates to a hot blast furnace with multi-channel combined hot blast outlets. Background Art

[0002] The hot blast furnace is a fundamental component of blast furnace ironmaking. Its primary function is to supply high-temperature hot air to the blast furnace. This hot air, generated by the hot blast furnace, enters the blast furnace through the hot blast outlet. Located on the hot wall of the hot blast furnace, this hot blast outlet endures the constant impact of high-temperature, high-pressure, and high-velocity hot air, while also bearing the heavy pressure of the hot blast outlet wall above it. Therefore, the hot blast outlet is the most vulnerable part of the hot blast furnace. Furthermore, as the volume of the blast furnace increases, the inner diameter of the hot blast outlet also increases. A larger inner diameter of the hot blast outlet increases the structural fragility and susceptibility to damage.

[0003] Statistics show that the main form of damage to the hot air outlet is collapse caused by the heavy pressure of the hot air furnace wall above the hot air outlet. The larger the inner diameter of the hot air outlet, the higher the probability of collapse. Summary of the Invention

[0004] In view of the defects and shortcomings of the prior art, the present invention provides a hot air furnace with a multi-channel combined hot air outlet.

[0005] To achieve the above-mentioned purpose, the hot air furnace of the present invention has a multi-channel combined hot air outlet, a hot air outlet is arranged on the large wall of the hot air furnace, and at least one middle support is provided in the hot air outlet, and the middle support divides the hot air outlet into two or more hot air channels.

[0006] Furthermore, the hot air outlet includes an inner ring working layer located in the inner ring and an outer petal working layer located outside the inner ring working layer; the middle support is vertically arranged between the upper and lower apses in the inner ring working layer.

[0007] Furthermore, the hot air passages are arranged in such a manner that the long sides are arranged upward and downward, and the narrow sides are arranged leftward and rightward.

[0008] Furthermore, the middle support is located between the hot air channels, and is arranged up and down on the inner ring working layer. The cross section is arranged in a diversion ship shape, with its bow facing the hot air furnace and the stern facing the hot air duct.

[0009] Furthermore, the interface between the inner ring working layer and the outer petal working layer is a catenary force-dividing interface structure.

[0010] Furthermore, the interface between the outer petal working layer and the large wall bricks of the hot blast furnace is a step-shaped structure, and the interface between the brick types of the outer petal working layer is perpendicular to the catenary interface.

[0011] Furthermore, the catenary interface is characterized in that: the catenary interface is formed by fitting four catenary interfaces that are symmetrical in the upper and lower parts and in the left and right parts, or by fitting two catenary interfaces that are symmetrical in the upper and lower parts.

[0012] Furthermore, the step-shaped structure at the interface between the outer petal working layer and the large wall bricks of the hot blast furnace has a step height that is an integer multiple of each large wall brick.

[0013] Furthermore, the multi-channel combined hot air outlet is suitable for top-fired hot air furnaces, and is also suitable for various types of hot air furnaces for iron-making blast furnaces, such as external-fired hot air furnaces, internal-fired hot air furnaces, checker brick hot air furnaces, and ball-type hot air furnaces.

[0014] The present invention designs the traditional hot air outlet as a multi-channel hot air outlet, sets supports between the multiple hot air channels, changes the traditional single large hot air channel into multiple small hot air channels, and sets a catenary linear force-dividing interface structure at the interface between the inner ring working layer and the outer petal working layer. The load of the hot air furnace wall above the hot air outlet is transferred to the walls on both sides of the hot air outlet through the outer petal working layer, reducing the load that the inner ring working layer bears on the hot air furnace wall. The role of the inner ring working layer is to protect the outer petal working layer from the impact of high-temperature hot air, and the role of the outer petal working layer is to divide the force to prevent the inner ring working layer from deforming and collapsing under the load of the hot air furnace wall. At the same time, the multi-channel middle support of the hot air outlet strengthens the structural strength of the inner ring working layer and the hot air outlet, thereby improving the structural stability and safety of the hot air outlet and extending its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the location of the hot blast stove of the present invention.

[0016] Figure 2 It is a schematic diagram of the AA section of the present invention.

[0017] Figure 3 It is a schematic diagram of the B-direction structure of the present invention.

[0018] In the figure: 1, first channel; 2, second channel; 3, middle support; 4, inner ring working layer;

[0019] 5. Outer petal working layer; 6. Catenary interface. DETAILED DESCRIPTION

[0020] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0021] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0022] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0023] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediary, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0024] Example 1

[0025] refer to Figure 1 , Figure 2 , Figure 3 In this embodiment, a multi-channel combined hot air outlet is provided. As shown in the figure, the middle support (3) separates the hot air outlet into two hot air channels, namely the first channel (1) and the second channel (2).

[0026] Example 2

[0027] Based on the above embodiment, more than two hot air channels can be designed according to the needs of the project, that is, the middle support can be one, two or more, so that the hot air outlet can be divided into two, three or more hot air channels.

[0028] Example 3

[0029] like Figure 2As shown, a catenary interface (6) is used between the inner ring working layer (4) and the outer petal working layer (5), and the interface between each brick type of the outer petal working layer (5) is perpendicular to the catenary interface (6). According to the force simulation analysis, this structure can transfer the load of the hot blast furnace wall directly above the outer petal working layer (5) to the walls on both sides of the hot blast outlet through the outer petal working layer (5), thereby reducing the load of the inner ring working layer (4) on the hot blast furnace wall.

[0030] Example 4

[0031] On the basis of the above embodiment, the middle support (3) is connected between the upper and lower arch points of the inner ring working layer (4); in this way, the traditional large arch stress-bearing structure is changed to a multi-channel small-hole small arch stress-bearing structure, thereby improving the structural stability of the inner ring working layer (4).

[0032] Example 5

[0033] During the production process of the hot blast furnace, the middle support (3) is subjected to the impact of high-temperature, high-velocity hot air flow. In order to improve the structural stability of the middle support (3), based on the above embodiment, the middle support (3) extends from the edge of the large wall brick of the hot blast furnace to a distance inside the hot blast branch pipe, and the cross-section adopts a ship-shaped guide structure to improve the ability of the middle support (3) to resist the impact of high-temperature, high-velocity hot air flow. The material is made of high-temperature resistant ceramic refractory material, and the implementation method can adopt integral prefabrication, on-site integral casting or on-site brick masonry, etc.

[0034] The present invention improves the structural stability of the hot air outlet and extends the service life of the hot air furnace through the structural features described above.

[0035] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0036] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A hot air furnace with a multi-channel combined hot air outlet, characterized in that: A hot air outlet is provided on the wall of the hot air furnace, wherein at least one middle support is provided in the hot air outlet, and the middle support divides the hot air outlet into two or more hot air channels; The hot air outlet includes an inner ring working layer located in the inner ring and an outer petal working layer located outside the inner ring working layer; the middle support is vertically arranged between the upper and lower apogees in the inner ring working layer; The interface between the inner ring working layer and the outer petal working layer is a catenary force-dividing interface structure.

2. The hot air furnace with multi-channel combined hot air outlet according to claim 1, characterized in that: The hot air passages are arranged in such a manner that the long sides are arranged upward and downward, and the narrow sides are arranged leftward and rightward.

3. The hot air furnace with multi-channel combined hot air outlet according to claim 1, characterized in that: The middle support is located between the hot air channels, and is arranged up and down on the inner ring working layer. The cross section is arranged in a diversion ship shape, with its bow facing the hot air furnace and the stern facing the hot air duct.

4. The hot air furnace with multi-channel combined hot air outlet according to claim 1, characterized in that: The interface between the outer petal working layer and the large wall bricks of the hot blast furnace is a step-shaped structure, and the interface between the brick types of the outer petal working layer is perpendicular to the catenary interface.

5. The hot air furnace with multi-channel combined hot air outlet according to claim 4, characterized in that: The catenary interface is formed by fitting four catenary interfaces that are symmetrical in the upper and lower directions and in the left and right directions, or by fitting two catenary interfaces that are symmetrical in the upper and lower directions.

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