Tuyere small sleeve and blast furnace

Abstract

The invention relates to a tuyere small sleeve and a blast furnace. The tuyere small sleeve comprises an inner sleeve and an outer sleeve, wherein the inner sleeve is provided with an air supply hole penetrating in the axial direction; the outer sleeve is arranged on the inner sleeve in a sleeving mode, the two axial ends of the outer sleeve and the inner sleeve are connected in a sealed mode, an annular installation cavity is defined by the inner sleeve and the outer sleeve, and the installation cavity is arranged on the outer side of the air supply hole in a sleeving mode; the reinforcing columns are arranged in the mounting cavity in the radial direction, a gap exists between every two adjacent reinforcing columns, and the two ends of each reinforcing column are connected with the outer wall of the inner sleeve and the inner wall of the outer sleeve respectively. Thus, the reinforcing columns can support the inner sleeve and the outer sleeve, the structural strength of the tuyere small sleeve is improved, the reinforcing columns can make contact with cooling liquid, the contact area of the tuyere small sleeve and the cooling liquid is increased, and therefore the heat exchange area is increased, abrasion and melting loss of the tuyere small sleeve caused by high temperature are reduced as much as possible, and the service life of the tuyere small sleeve is prolonged. Moreover, the tuyere small sleeve is simple in structure, convenient to form, low in cost and convenient for low-cost batch production.

Description

Technical Field

[0001] The present application relates to the technical field of smelting equipment, and in particular to a tuyere sleeve and a blast furnace. Background Art

[0002] Blast furnace is one of the core production links of long-process steel enterprises. The tuyere sleeve is a channel for blowing hot air and pulverized coal into the blast furnace. The front end of the tuyere sleeve extends into the furnace wall of the blast furnace by about 400~700mm, and 1200℃ hot air is blown into the blast furnace at high speed, reacting with the coke in the furnace. The flame temperature is as high as 2300℃ and the slag temperature reaches 1500℃. Its working conditions are very complex. As an important component of the blast furnace, if the tuyere sleeve is damaged, it will cause abnormal shutdown of the blast furnace, which will bring direct economic losses to the enterprise.

[0003] High temperature, ultra-high temperature environment and molten iron are huge challenges faced by the tuyere sleeve. In order to improve the service life of the sleeve and increase the overall efficiency of steelmaking, the current tuyere sleeve solution has developed from a single cavity to a double cavity. Since the tuyere sleeve has double flow channels, the rear cavity can be used as a backup if the front cavity is damaged. However, the damage speed of the front cavity of the tuyere sleeve is still very fast, and it can only rely on the rear cavity. The double-cavity tuyere sleeve only improves the service life of the sleeve to a certain extent. Compared with the current development ideas, the structural strength, heat exchange effect, and overall life of the tuyere sleeve still cannot meet the use requirements. The biggest problem facing the tuyere sleeve is still the poor heat exchange effect and the overall temperature is too high, which leads to different degrees of wear and melting loss under high temperature. Summary of the invention

[0004] Based on this, it is necessary to provide a tuyere sleeve and a blast furnace to address the current problems of poor heat exchange effect and easy melting of the tuyere sleeve, which can increase the heat exchange area, enhance the heat exchange effect, increase the structural strength of the tuyere sleeve, minimize the wear and melting of the tuyere sleeve caused by high temperature, and extend the service life of the tuyere sleeve.

[0005] A small air outlet sleeve, comprising:

[0006] An inner sleeve, wherein the inner sleeve has an air supply hole extending through the axial direction;

[0007] An outer sleeve is sleeved on the inner sleeve, and the outer sleeve is sealed to both ends of the inner sleeve in the axial direction, the inner sleeve and the outer sleeve are arranged to form an annular installation cavity, and the installation cavity is sleeved on the outer side of the air supply hole; and

[0008] A plurality of reinforcing columns are radially arranged in the installation cavity, and there are intervals between adjacent reinforcing columns. Two ends of each reinforcing column are respectively connected to the outer wall of the inner sleeve and the inner wall of the outer sleeve.

[0009] In one embodiment of the present application, a plurality of the reinforcing columns are arranged at intervals along the axial direction and the circumferential direction of the inner sleeve;

[0010] And / or, the plurality of reinforcing columns are evenly or unevenly distributed in the installation cavity.

[0011] In one embodiment of the present application, along the axial direction of the inner sleeve, two adjacent reinforcement columns are staggered in the circumferential direction.

[0012] In one embodiment of the present application, the reinforcement columns are arranged in a sparse or dense manner according to the temperature of the tuyere sleeve.

[0013] In one embodiment of the present application, the reinforcing column is cylindrical, prismatic, elliptical, plate-shaped or rib-shaped;

[0014] And / or, the diameters of the circumscribed circles of the reinforcing columns are the same or different;

[0015] And / or, the cross-sectional areas of the reinforcing columns along the radial direction are equal, or the cross-sectional areas of the reinforcing columns along the radial direction decrease or increase.

[0016] In one embodiment of the present application, the tuyere sleeve further includes a liquid inlet pipe and a liquid outlet pipe, and the liquid inlet pipe and the liquid outlet pipe are both connected to the installation cavity.

[0017] In one embodiment of the present application, the installation cavity at least includes a first cavity and a second cavity that are independent of each other, and the first cavity and the second cavity are sequentially arranged along the axial direction;

[0018] The plurality of reinforcing columns are disposed in the first cavity and / or the second cavity.

[0019] In one embodiment of the present application, the tuyere sleeve further comprises a partition plate, which is arranged in the installation cavity and is sealedly connected to the outer wall of the inner sleeve and the inner wall of the outer sleeve;

[0020] The partition plate can separate the installation cavity into the first cavity and the second cavity which are independent of each other.

[0021] In one embodiment of the present application, the liquid inlet pipe of the tuyere sleeve includes a first inlet pipe and a second inlet pipe, and the liquid outlet pipe of the tuyere sleeve includes a first outlet pipe and a second outlet pipe;

[0022] The first inlet pipe and the first outlet pipe pass through the second cavity and are connected to the first cavity, and the first inlet pipe and the second outlet pipe pass through the intervals between the adjacent reinforcement columns;

[0023] The second inlet pipe and the second outlet pipe are communicated with the second cavity.

[0024] A blast furnace, comprising a furnace body and a tuyere sleeve as described in any one of the above technical features;

[0025] The tuyere sleeve is arranged at the entrance of the furnace body, and one end of the tuyere sleeve extends into the furnace body.

[0026] After adopting the above technical solution, this application has at least the following technical effects:

[0027] The tuyere sleeve and blast furnace of the present application, in which the outer sleeve is arranged outside the inner sleeve, and the axial ends of the outer sleeve are respectively sealed with the axial ends of the inner sleeve, and the outer wall of the inner sleeve and the inner wall of the outer sleeve are arranged to form an annular installation cavity. A plurality of reinforcing columns are arranged at intervals in the installation cavity, and the reinforcing columns extend radially and connect the outer wall of the inner sleeve and the inner wall of the outer sleeve, so as to strengthen the inner sleeve and the outer sleeve and increase the heat exchange area.

[0028] The tuyere sleeve has a plurality of spaced reinforcing columns added in the installation cavity. The reinforcing columns can support the inner sleeve and the outer sleeve, increase the structural strength of the tuyere sleeve, and the heat of the inner sleeve and the outer sleeve can be transferred to the reinforcing columns. After the installation cavity is filled with coolant, the reinforcing columns can contact the coolant, increase the contact area between the tuyere sleeve and the coolant, thereby increasing the heat exchange area. At the same time, the reinforcing columns can also disturb the coolant, strengthen the heat exchange, and reduce the wear and melting loss of the tuyere sleeve caused by high temperature as much as possible, thereby extending the service life of the tuyere sleeve. Moreover, the tuyere sleeve adopts the reinforcing columns to increase the heat exchange area, has a simple structure, is easy to form, and has low cost, and is easy to mass produce at low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the air outlet sleeve in the first embodiment of the present application.

[0030] Figure 2 for Figure 1 A cross-sectional view of the tuyere sleeve is shown.

[0031] Figure 3 This is a schematic diagram of the tuyere sleeve in the second embodiment of the present application.

[0032] Figure 4 for Figure 3 A cross-sectional view of the tuyere sleeve is shown.

[0033] Figure 5 for Figure 4 A schematic diagram showing the tuyere sleeve without the reinforcement column is shown.

[0034] Figure 6 for Figure 4 A schematic diagram of the reinforcement column, the first inlet pipe and the second inlet pipe in the tuyere sleeve is shown.

[0035] Figure 7 for Figure 6 A schematic diagram of a single set of reinforcing columns, a first inlet pipe and a second inlet pipe is shown.

[0036] Figure 8 for Figure 7 Schematic diagram of a single set of reinforcing columns shown.

[0037] Fig. 9 for Figure 4 The heat exchange schematic diagram of the tuyere sleeve is shown.

[0038] Among them: 100, air outlet sleeve; 110, inner sleeve; 111, air supply hole; 120, outer sleeve; 130, installation cavity; 131, first cavity; 132, second cavity; 140, reinforcement column; 150, first end plate; 160, second end plate; 170, liquid inlet pipe; 171, first inlet pipe; 172, second inlet pipe; 180, liquid outlet pipe; 181, first outlet pipe; 182, second outlet pipe; 190, partition. DETAILED DESCRIPTION

[0039] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0040] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply 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 a limitation on the present application.

[0041] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0042] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0043] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "on" or "below" a second feature, etc., or the like, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0044] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0045] It is understandable that the tuyere sleeve is an important component of the blast furnace. High temperature, ultra-high temperature environment and molten iron are huge problems faced by the tuyere sleeve. If the tuyere sleeve is damaged, it will cause abnormal shutdown of the blast furnace, which will bring direct economic losses to the enterprise. At present, the tuyere sleeve solution has developed from a single cavity to a double cavity. Since the tuyere sleeve has a double flow channel, the rear cavity can be used as a backup if the front cavity is damaged. However, the damage speed of the front cavity of the tuyere sleeve is still very fast, and it can only rely on the rear cavity. The biggest problem facing the tuyere sleeve is still the poor heat exchange effect and the overall temperature is too high, which leads to different degrees of wear and melting loss under high temperature.

[0046] For this purpose, see Figure 1 and Figure 3 , the present application provides a tuyere sleeve 100. Figure 1 This is a schematic diagram of the air outlet sleeve 100 in the first embodiment of the present application. Figure 3Schematic diagram of the tuyere sleeve 100 in the second embodiment of the present application. The tuyere sleeve 100 is applied to a blast furnace, and the tuyere sleeve 100 is arranged at the entrance of the furnace body of the blast furnace, and one end of the tuyere sleeve 100 extends into the furnace body. Hot air or auxiliary fuel is transported to the blast furnace through the tuyere sleeve 100 to improve the combustion performance of the blast furnace.

[0047] The tuyere sleeve 100 can increase the contact area between the tuyere sleeve 100 and the coolant, thereby increasing the heat exchange area, strengthening the heat exchange effect, increasing the structural strength of the tuyere sleeve 100, and reducing the wear and melting loss of the tuyere sleeve 100 caused by high temperature as much as possible, thereby extending the service life of the tuyere sleeve 100. Moreover, the tuyere sleeve 100 has a simple structure, is easy to form, and has a low cost, and is easy to mass produce at low cost.

[0048] The specific structure of the tuyere sleeve 100 according to an embodiment is introduced below.

[0049] See also Figures 1 to 4 In one embodiment, the air outlet sleeve 100 includes an inner sleeve 110, an outer sleeve 120 and a plurality of reinforcing columns 140. The inner sleeve 110 has an air supply hole 111 that penetrates in the axial direction. The outer sleeve 120 is sleeved on the inner sleeve 110, and the outer sleeve 120 is sealedly connected to the inner sleeve 110 at both axial ends. The inner sleeve 110 and the outer sleeve 120 are arranged to form an annular installation cavity 130, and the installation cavity 130 is sleeved on the outside of the air supply hole 111. A plurality of reinforcing columns 140 are radially arranged in the installation cavity 130, and there are intervals between adjacent reinforcing columns 140, and the two ends of each reinforcing column 140 are respectively connected to the outer wall of the inner sleeve 110 and the inner wall of the outer sleeve 120. Figure 2 for Figure 1 The cross-sectional view of the tuyere sleeve 100 is shown. Figure 4 for Figure 3 A cross-sectional view of the tuyere sleeve 100 is shown.

[0050] The inner sleeve 110 and the outer sleeve 120 are both annularly arranged, and both are hollow structures, and the outer sleeve 120 is sleeved on the outer side of the inner sleeve 110. The axial ends of the outer sleeve 120 are sealed to the axial ends of the inner sleeve 110. It is worth noting that the axial direction here refers to the central axis direction of the inner sleeve 110, that is, Figures 1 to 4 In the left and right directions shown, the corresponding circumferential direction refers to the circumferential direction of the inner sleeve 110, and the radial direction refers to the radial direction of the inner sleeve 110. The axial, circumferential and radial directions are also applicable to other components and will not be repeated in the following text.

[0051] The hollow inner cavity of the inner sleeve 110 is an air supply hole 111, and the air supply hole 111 is arranged to penetrate along the axial direction. The tuyere small sleeve 100 can transport hot air or inject auxiliary fuel to the blast furnace through the air supply hole 111. After the outer sleeve 120 is sleeved on the inner sleeve 110, the inner wall of the outer sleeve 120 and the outer wall of the inner sleeve 110 are arranged to form a hollow cavity, which is the installation cavity 130. The installation cavity 130 is arranged in an annular shape and sleeved on the outside of the air supply hole 111.

[0052] The tuyere sleeve 100 is subjected to high temperature in actual operation. To reduce the high temperature loss of the tuyere sleeve 100, a coolant is usually introduced into the installation cavity 130. The coolant can contact the inner wall of the outer sleeve 120 and the outer wall of the inner sleeve 110 in the installation cavity 130 to exchange heat between the inner sleeve 110 and the outer sleeve 120, and reduce the temperature of the inner sleeve 110 and the outer sleeve 120 as much as possible to ensure the performance of the tuyere sleeve 100. Usually, the coolant is cooling water, and of course, the coolant can also be other liquids that can play a cooling role.

[0053] In order to increase the contact area between the tuyere sleeve 100 and the coolant, the present application sets a plurality of reinforcing columns 140 in the installation cavity 130. The reinforcing columns 140 are radially arranged in the installation cavity 130, and the two ends of the reinforcing columns 140 are respectively connected to the inner wall of the outer sleeve 120 and the outer wall of the inner sleeve 110. There is a gap between any two adjacent reinforcing columns 140, and the coolant can flow between the reinforcing columns 140 and contact with the reinforcing columns 140.

[0054] After the reinforcing column 140 is disposed between the inner sleeve 110 and the outer sleeve 120, the reinforcing column 140 can support the inner sleeve 110 and the outer sleeve 120, greatly enhancing the overall structural strength of the tuyere sleeve 100, suppressing the deformation of the tuyere sleeve 100, so as to improve the structural strength of the tuyere sleeve 100 in a high temperature environment, improve the reliability of the tuyere sleeve 100, and ensure the performance of the tuyere sleeve 100.

[0055] Moreover, after the reinforcing column 140 is arranged in the installation cavity 130, the reinforcing column 140 can contact the coolant in the installation cavity 130. That is, the tuyere sleeve 100 contacts the coolant through the outer wall of the inner sleeve 110 and the inner wall of the outer sleeve 120, and also contacts the coolant through the plurality of reinforcing columns 140.

[0056] In this way, the reinforcing column 140 can increase the contact area between the tuyere sleeve 100 and the coolant, thereby greatly increasing the heat exchange area of ​​the tuyere sleeve 100, improving the heat exchange efficiency, and improving the heat exchange effect, thereby reducing the melting loss of the tuyere sleeve 100 caused by high temperature as much as possible, and extending the service life of the tuyere sleeve 100. Moreover, when the coolant flows in the installation cavity 130, the reinforcing column 140 can also turbulent the coolant to enhance the heat exchange effect.

[0057] Moreover, when the tuyere sleeve 100 is in a high temperature environment, the temperature of the outer jacket 120 in the tuyere sleeve 100 is higher. Usually, the temperature is transferred from the high temperature part to the low temperature part. After the reinforcing column 140 is arranged radially, the reinforcing column 140 can transfer the heat of the outer jacket 120 to the middle, following the thermodynamic quantification, realizing directional heat conduction, and further improving the heat exchange effect.

[0058] At the same time, only the reinforcing column 140 is arranged in the installation cavity 130, and the air outlet sleeve 100 eliminates the deflector in the prior art, and there is no deflector divided into multiple cavities, and the coolant does not flow through the cavity when flowing in the installation cavity 130, thereby ensuring the stability of the coolant flow. In addition, after eliminating the deflector, the air outlet sleeve 100 has a simple structure, fewer parts, convenient molding and processing, and is suitable for low-cost mass production.

[0059] The tuyere sleeve 100 of the above embodiment has a plurality of spaced reinforcing columns 140 added to the installation cavity 130. The reinforcing columns 140 can support the inner sleeve 110 and the outer sleeve 120, thereby increasing the structural strength of the tuyere sleeve 100. The heat of the inner sleeve 110 and the outer sleeve 120 can be transferred to the reinforcing columns 140. After the installation cavity 130 is filled with coolant, the reinforcing columns 140 can contact the coolant, thereby increasing the contact area between the tuyere sleeve 100 and the coolant, thereby increasing the heat exchange area. At the same time, the reinforcing columns 140 can also disturb the coolant, strengthen the heat exchange, and minimize the wear and melting loss of the tuyere sleeve 100 caused by high temperature, thereby extending the service life of the tuyere sleeve 100. Moreover, the tuyere sleeve 100 uses the reinforcing columns 140 to increase the heat exchange area, has a simple structure, is easy to form, and has low cost, and is easy to mass produce at low cost.

[0060] See also Figures 1 to 4 In one embodiment, the inner sleeve 110 and the outer sleeve 120 are arranged roughly in a conical shape. That is, the tuyere sleeve 100 is arranged roughly in a conical shape as a whole, and the diameter of the tuyere sleeve 100 gradually decreases from the left side to the right side, and the right side of the tuyere sleeve 100 is the front end, and the left side is the rear end, and the front end of the tuyere sleeve 100 is installed in the furnace body of the blast furnace.

[0061] See also Figures 1 to 4 In one embodiment, the tuyere sleeve 100 further includes an annular first end plate 150 and a second end plate 160 , which are located at the axial ends of the inner sleeve 110 and sealably connect the axial ends of the inner sleeve 110 and the outer sleeve 120 .

[0062] The first end plate 150 is located at the front end of the tuyere sleeve 100, and the second end plate 160 is located at the rear end of the tuyere sleeve 100. The first end plate 150 seals and connects the axial ends of the inner sleeve 110 and the outer sleeve 120 at the front end, and the second end plate 160 seals and connects the axial ends of the inner sleeve 110 and the outer sleeve 120 at the rear end. The inner sleeve 110, the outer sleeve 120, the first end plate 150 and the second end plate 160 are arranged to form an annular installation cavity 130.

[0063] See also Figure 1 and Figure 2 In one embodiment, the tuyere sleeve 100 further includes a liquid inlet pipe 170 and a liquid outlet pipe 180, and the liquid inlet pipe 170 and the liquid outlet pipe 180 are both connected to the installation cavity 130. The liquid inlet pipe 170 and the liquid outlet pipe 180 are located at the rear end of the tuyere sleeve 100, and the liquid inlet pipe 170 and the liquid outlet pipe 180 penetrate the second end plate 160 and extend into the installation cavity 130.

[0064] One end of the liquid inlet pipe 170 and the liquid outlet pipe 180 located in the installation cavity 130 are both connected to the installation cavity 130, and the other ends of the liquid inlet pipe 170 and the liquid outlet pipe 180 are respectively connected to a conveying device such as a circulation pump, a cooling source, etc. The conveying device conveys the coolant to the installation cavity 130 through the liquid inlet pipe 170, and recovers the coolant in the installation cavity 130 through the liquid outlet pipe 180.

[0065] After the low-temperature coolant enters the liquid inlet pipe 170, the liquid inlet pipe 170 can transport the coolant to the installation cavity 130, and the coolant can fill the installation cavity 130 and perform heat exchange with the outer wall of the reinforcing column 140 and the inner wall of the inner sleeve 110 and the inner wall of the outer sleeve 120. The coolant after absorbing heat flows out of the installation cavity 130 through the liquid outlet pipe 180. Continuously transporting the coolant to the installation cavity 130 in this way can ensure the heat exchange effect of the tuyere sleeve 100, reduce the melting loss of the tuyere sleeve 100 caused by high temperature, and extend the service life of the tuyere sleeve 100 as much as possible.

[0066] In the tuyere sleeve 100, the inner sleeve 110, the outer sleeve 120, the first end plate 150, the second end plate 160, the reinforcing column 140, the liquid inlet pipe 170 and the liquid outlet pipe 180 are formed separately, and then the whole is assembled by welding. In this way, the structural strength of the tuyere sleeve 100 can be ensured, and at the same time, the molding process can be simplified, the production and processing of the tuyere sleeve 100 can be facilitated, the processing difficulty can be reduced, and the sealing requirements can be guaranteed.

[0067] See also Figure 1 and Figure 2 In the first embodiment of the present application, the tuyere sleeve 100 is a single-cavity structure. That is, the tuyere sleeve 100 is a single-cavity sleeve, and the installation cavity 130 surrounded by the inner sleeve 110 and the outer sleeve 120 is an integral cavity.

[0068] The plurality of reinforcing columns 140 are completely distributed in a separate installation cavity 130. The heat exchange area of ​​the tuyere sleeve 100 is increased by the reinforcing columns 140, and the heat of the outer jacket 120 is directed to the installation cavity 130 to contact with the coolant, further strengthening the heat exchange and achieving the function of directional heat conduction. At the same time, the plurality of reinforcing columns 140 are supported on the outer wall of the inner jacket 110 and the inner wall of the outer jacket 120 to support the inner jacket 110 and the outer jacket 120, greatly enhancing the overall structural strength of the tuyere sleeve 100 and inhibiting the structural deformation of the tuyere sleeve 100.

[0069] In this way, after the reinforcing column 140 is provided in the single-chamber tuyere sleeve 100, the heat exchange area of ​​the tuyere sleeve 100 can be increased while ensuring the overall structural strength of the tuyere sleeve 100, thereby enhancing the heat exchange effect, so as to minimize the wear and melting loss of the tuyere sleeve 100 caused by high temperature and extend the service life of the tuyere sleeve 100.

[0070] See also Figure 3 and Figure 4 In the second embodiment of the present application, the air outlet sleeve 100 is a double-cavity structure. That is, the installation cavity 130 in the air outlet sleeve 100 forms two independent cavities. Specifically, the installation cavity 130 includes a first cavity 131 and a second cavity 132 that are independent of each other. The first cavity 131 and the second cavity 132 are arranged in sequence along the axial direction, and a plurality of the reinforcing columns 140 are arranged in the first cavity 131 and / or the second cavity 132.

[0071] The two independent cavities of the installation cavity 130 are the first cavity 131 and the second cavity 132. The first cavity 131 is located at the front end, that is, the front cavity, and the second cavity 132 is located at the rear end, that is, the rear cavity. The first cavity 131 and the second cavity 132 are independent and not connected, that is, the first cavity 131 and the second cavity 132 contain cooling liquid respectively, and the cooling liquid will not flow between the first cavity 131 and the second cavity 132. The cooling liquid in the first cavity 131 and the second cavity 132 is used to exchange heat with the inner sleeve 110 and the outer sleeve 120 respectively, so as to reduce the wear and melting loss of the tuyere sleeve 100 caused by high temperature as much as possible, and extend the service life of the tuyere sleeve 100.

[0072] In this embodiment, a plurality of reinforcing columns 140 are disposed in both the first cavity 131 and the second cavity 132. That is, the plurality of reinforcing columns 140 are respectively distributed in the first cavity 131 and the second cavity 132. The reinforcing columns 140 in the first cavity 131 can contact with the coolant, and the reinforcing columns 140 in the second cavity 132 can also contact with the coolant, thereby increasing the heat exchange area of ​​the tuyere sleeve 100.

[0073] At the same time, the reinforcing column 140 can directional conduct the heat of the outer sleeve 120 to the first cavity 131 and the second cavity 132, and contact with the coolant, further strengthening the heat exchange, and achieving the function of directional heat conduction. In addition, a plurality of reinforcing columns 140 are supported on the outer wall of the inner sleeve 110 and the inner wall of the outer sleeve 120 to support the inner sleeve 110 and the outer sleeve 120, greatly enhancing the overall structural strength of the tuyere sleeve 100 and inhibiting the structural deformation of the tuyere sleeve 100.

[0074] In this way, after reinforcing columns 140 are provided in both the first cavity 131 and the second cavity 132 of the tuyere sleeve 100, the heat exchange area of ​​the tuyere sleeve 100 can be increased while ensuring the overall structural strength of the tuyere sleeve 100, thereby enhancing the heat exchange effect, so as to minimize the wear and melting loss of the tuyere sleeve 100 caused by high temperature and extend the service life of the tuyere sleeve 100.

[0075] Of course, in other embodiments of the present application, a plurality of reinforcing columns 140 may be provided only in the first cavity 131 , or a plurality of reinforcing columns 140 may be provided only in the second cavity 132 .

[0076] See also Figures 3 to 5 In one embodiment, the tuyere sleeve 100 further includes a partition 190, which is disposed in the installation cavity 130 and is sealed to the outer wall of the inner sleeve 110 and the inner wall of the outer sleeve 120. The partition 190 can separate the installation cavity 130 into the first cavity 131 and the second cavity 132 which are independent of each other. Figure 5 for Figure 4 The schematic diagram shown is a diagram of the tuyere sleeve 100 without the reinforcing column 140 .

[0077] The partition 190 is arranged in an annular shape and is arranged between the inner sleeve 110 and the outer sleeve 120. The outer edge of the partition 190 is sealed to the inner wall of the outer sleeve 120, and the inner edge of the partition 190 is sealed to the outer wall of the inner sleeve 110. In this way, the partition 190 can separate the installation cavity 130 into two independent and non-connected first cavities 131 and second cavities 132. In this way, the coolants in the first cavity 131 and the second cavity 132 will not mix, and the first cavity 131 and the second cavity 132 are respectively heat exchanged through the corresponding coolants to ensure the heat exchange effect of the tuyere sleeve 100.

[0078] See also Figures 3 to 7In one embodiment, the liquid inlet pipe 170 of the tuyere sleeve 100 includes a first inlet pipe 171 and a second inlet pipe 172, and the liquid outlet pipe 180 of the tuyere sleeve 100 includes a first outlet pipe 181 and a second outlet pipe 182. The first inlet pipe 171 and the first outlet pipe 181 pass through the second cavity 132 and communicate with the first cavity 131, and the first inlet pipe 171 and the second outlet pipe 182 pass through the interval between the adjacent reinforcing columns 140.

[0079] The second inlet pipe 172 and the second outlet pipe 182 are connected to the second cavity 132 . Figure 6 for Figure 4 The schematic diagram of the reinforcement column 140, the first inlet pipe 171 and the second inlet pipe 172 in the tuyere sleeve 100 shown in FIG. Figure 7 for Figure 6 A schematic diagram of a single set of reinforcing columns 140 , a first inlet pipe 171 and a second inlet pipe 172 is shown.

[0080] The tuyere sleeve 100 is a double-cavity structure, and accordingly, two sets of inlet pipes and outlet pipes are used to transport the coolant to the first cavity 131 and the second cavity 132 respectively. The first inlet pipe 171 and the first outlet pipe 181 are the delivery pipelines of the first cavity 131, and the second inlet pipe 172 and the second outlet pipe 182 are the delivery pipelines of the second cavity 132, and one end of the first inlet pipe 171 and the second inlet pipe 172 penetrates the second cavity 132 and extends into the first cavity 131.

[0081] The cooling liquid is transported to the first cavity 131 through the first inlet pipe 171, and the cooling liquid in the first cavity 131 absorbs heat and flows out through the first outlet pipe 181. The cooling liquid is transported to the second cavity 132 through the second inlet pipe 172, and the cooling liquid in the second cavity 132 absorbs heat and flows out through the second outlet pipe 182.

[0082] Moreover, when the first inlet pipe 171 and the first outlet pipe 181 pass through the second cavity 132, the first inlet pipe 171 and the first outlet pipe 181 pass through the gap between the reinforcing column 140 and extend into the first cavity 131. In this way, interference between the first inlet pipe 171 and the first outlet pipe 181 and the reinforcing column 140 can be avoided.

[0083] Of course, in other embodiments of the present application, the tuyere sleeve 100 may also be a three-cavity structure or even a multi-cavity structure. In this case, a reinforcing column 140 may be provided in each cavity, or in some cavities. The principle is substantially the same as that of the tuyere sleeve 100 in the second embodiment, and will not be described in detail here.

[0084] It is worth mentioning that the multiple reinforcing columns 140 of the present application are applicable to single-cavity tuyere sleeves 100, double-cavity tuyere sleeves 100, and also to tuyere sleeves 100 of any cavity. The layout principle of the tuyere sleeves 100 in each cavity is essentially the same. In the following text, only the layout form of the reinforcing columns 140 in the double-cavity tuyere sleeves 100 is described.

[0085] See also Figure 2 , Figure 4 , Figures 6 to 8 In one embodiment, the plurality of reinforcing columns 140 are arranged at intervals along the axial direction and the circumferential direction of the inner sleeve 110 . Figure 8 for Figure 7 The schematic diagram of a single group of reinforcing columns 140 is shown. That is, the plurality of reinforcing columns 140 are arranged at intervals around the circumference of the inner sleeve 110, and the plurality of reinforcing columns 140 are also arranged at intervals along the axial direction of the inner sleeve 110, so that the plurality of reinforcing columns 140 form a multi-circle structure on the outer wall of the inner sleeve 110.

[0086] In this way, the plurality of reinforcing columns 140 can support the inner sleeve 110 and the outer sleeve 120 in the first cavity 131 and the second cavity 132 of the installation cavity 130, and increase the heat exchange area of ​​the tuyere sleeve 100. At the same time, the reinforcing columns 140 can directional conduct the heat of the outer sleeve 120 to the first cavity 131 and the second cavity 132, and contact with the coolant to further enhance the heat exchange. In this way, the heat exchange efficiency can be improved, so as to improve the heat exchange effect, reduce the melting loss of the tuyere sleeve 100 caused by high temperature as much as possible, and extend the service life of the tuyere sleeve 100.

[0087] In one embodiment, the plurality of reinforcing columns 140 are evenly distributed in the installation cavity 130. That is, the plurality of reinforcing columns 140 are evenly distributed in the first cavity 131 and the second cavity 132, and the distance between two adjacent reinforcing columns 140 is equal.

[0088] The multiple uniformly arranged reinforcing columns 140 can increase the heat exchange area, improve the heat exchange efficiency, and effectively reduce the temperature of the tuyere sleeve 100. At the same time, the multiple uniformly arranged reinforcing columns 140 can also relieve the overall stress of the tuyere sleeve 100, which is reduced by about 80MPa compared to the tuyere sleeve without reinforcing columns.

[0089] Of course, in other embodiments of the present application, the plurality of reinforcing columns 140 may also be distributed non-uniformly in the installation cavity 130. That is, the plurality of reinforcing columns 140 are distributed non-uniformly in the first cavity 131 and the second cavity 132, and the distances between the corresponding two reinforcing columns 140 are not equal.

[0090] In this way, multiple non-uniform reinforcement columns 140 can also increase the heat exchange area, improve the heat exchange efficiency, and effectively reduce the temperature of the tuyere sleeve 100. At the same time, multiple non-uniformly arranged reinforcement columns 140 can also relieve the overall stress of the tuyere sleeve 100.

[0091] In this embodiment, the plurality of reinforcing columns 140 are uniformly distributed in the first cavity 131 and the second cavity 132. Of course, in other embodiments of the present application, the plurality of reinforcing columns 140 are uniformly distributed along the circumferential direction and partially uniformly distributed along the axial direction, or the plurality of reinforcing columns 140 are uniformly distributed along the axial direction and non-uniformly distributed along the circumferential direction, or the plurality of reinforcing columns 140 are non-uniformly distributed in the first cavity 131 and the second cavity 132.

[0092] In one embodiment, the reinforcing columns 140 are arranged in a dense and sparse manner according to the temperature of the tuyere sleeve 100. That is, the reinforcing columns 140 can be non-uniformly distributed at high temperature locations and low temperature locations according to the thermal environment, that is, the plurality of reinforcing columns 140 are non-uniformly distributed in the first cavity 131 and the second cavity 132 according to the cavity temperature, the reinforcing columns 140 are densely arranged at locations with high temperatures, and the reinforcing columns 140 are sparsely arranged at locations with low temperatures.

[0093] Generally, the temperature above the tuyere sleeve 100 is higher. In this case, a denser reinforcement column 140 can be arranged at the corresponding upper position, and a sparser reinforcement column 140 can be arranged at the rest. In this way, multiple reinforcement columns 140 can increase the heat exchange area at the upper part, improve the heat exchange efficiency, and achieve a better heat exchange effect.

[0094] See also Figure 6 In one embodiment, along the axial direction of the inner sleeve 110, two adjacent reinforcing columns 140 are staggered in the circumferential direction. In other words, the axial reinforcing columns 140 are staggered. In this way, the reinforcing columns 140 can extend in different directions, and then the reinforcing columns 140 can contact the coolant in different directions to enhance the heat exchange effect.

[0095] See also Figures 6 to 8 In this embodiment, the reinforcing column 140 is cylindrical. The cylindrical reinforcing column 140 can guide the flow of the coolant and ensure the contact area between the coolant and the reinforcing column 140. Of course, in other embodiments of the present application, the reinforcing column 140 can also be prismatic, elliptical, plate-shaped, rib-shaped, or other regular or irregular shapes, as long as the contact area with the coolant can be increased without affecting the flow of the coolant.

[0096] See also Figures 6 to 8In one embodiment, the shapes of the reinforcing columns 140 are the same. That is, the reinforcing columns 140 are made of the same type of structure. Of course, in other embodiments of the present application, the shapes of the reinforcing columns 140 may be different, or some of the reinforcing columns 140 may have the same shape and some of the reinforcing columns 140 may have different shapes.

[0097] See also Figures 6 to 8 In one embodiment, the diameters of the circumscribed circles of the reinforcing columns 140 are the same or different. That is, the diameters of the reinforcing columns 140 can be the same, or the diameters of the reinforcing columns 140 can be different.

[0098] See also Figures 6 to 8 In one embodiment, the cross-sectional areas of the reinforcing columns 140 along the radial direction are equal. That is, the reinforcing columns 140 along the radial direction are of equal cross-sectional structure. Of course, in other embodiments of the present application, the cross-sectional areas of the reinforcing columns 140 along the radial direction are reduced or increased. That is, the reinforcing columns 140 along the radial direction are of variable cross-sectional structure.

[0099] It is worth noting that the number of reinforcing columns 140 arranged along the circumferential direction can be set to a corresponding number according to specific needs. Figures 6 to 8 As shown, exemplarily, a plurality of reinforcing columns 140 are arranged in a circle along the circumferential direction to form a group of reinforcing columns 140, and the number of a group of reinforcing columns 140 is ten. Of course, in other embodiments of the present application, the number of reinforcing columns 140 can also be other. Optionally, the number of reinforcing columns 140 in each group is the same and / or different.

[0100] It is worth noting that the number of reinforcing columns 140 arranged along the axial direction can be set to a corresponding number according to specific needs. Figure 4 and Figure 6 As shown, exemplarily, the number of reinforcing columns 140 along the axial direction is seven groups, wherein one group of reinforcing columns 140 is disposed in the first cavity 131, and the remaining six groups of reinforcing columns 140 are disposed in the second cavity 132. Of course, in other embodiments of the present application, the number of groups of reinforcing columns 140 along the axial direction may be other, and the number of groups of reinforcing columns 140 in the first cavity 131 and the second cavity 132 may also be other.

[0101] The tuyere sleeve 100 of the present application adds a reinforcing column 140 in the first cavity 131 and the second cavity 132 of the installation cavity 130. The reinforcing column 140 can contact the coolant in the first cavity 131 and the second cavity 132, increase the heat exchange area, enhance the overall heat exchange, reduce the operating temperature of the tuyere sleeve 100, and extend the service life of the tuyere sleeve 100.

[0102] like Fig. 9 As shown, Fig. 9 for Figure 4The heat exchange schematic diagram of the tuyere jacket 100 is shown. The first cavity 131 of the tuyere jacket 100 is subjected to the radiation, convection heating, gas convection, radiation heat exchange, etc. of the furnace of the blast furnace, and the high temperature is introduced from the outer wall of the jacket 120 into the coolant in the first cavity 131. The coolant in the first cavity 131 completes a heat exchange cycle through the first inlet pipe 171, the first cavity 131 and the first outlet pipe 181, and conducts away the heat.

[0103] The second cavity 132 of the tuyere sleeve 100 is subjected to the radiation, convection heating, gas convection, radiation heat exchange, etc. of the blast furnace, and the high temperature is introduced into the coolant in the second cavity 132 from the outer wall surface of the outer jacket 120. The coolant in the second cavity 132 completes a heat exchange cycle through the second inlet pipe 172, the second cavity 132 and the second outlet pipe 182 to conduct the heat away.

[0104] The tuyere sleeve 100 with the reinforcement column 140 in the present application is experimentally compared with the tuyere sleeve without the reinforcement column: the reinforcement column 140 is set in the first cavity 131 and the second cavity 132, which greatly increases the heat exchange area, and increases the heat exchange area by 20% compared with the tuyere sleeve without the reinforcement column, which significantly improves the heat exchange effect. Moreover, during the heat exchange process, the temperature is transferred from the outer wall of the jacket 120 to the coolant in the first cavity 131 and the second cavity 132, and the outer shell temperature of the tuyere sleeve without the reinforcement column is reduced by about 50°C, which further improves the heat exchange effect.

[0105] The tuyere sleeve 100 of the present application has a simple structure and is easy to form. A reinforcing column 140 is arranged in the installation cavity, and coolant is transported through a liquid inlet pipe 170 and a liquid outlet pipe 180. Compared with the current tuyere sleeve using a deflector, the tuyere sleeve 100 of the present application has a simple structure and fewer components. The whole is formed by block casting and welding, and the molding process is simple, which is suitable for low-cost mass production.

[0106] Moreover, the first cavity 131 and the second cavity 132 of the tuyere sleeve 100 are independent and complete cavities. There is no deflector in the first cavity 131 and the second cavity 132. The coolant flows independently in the first cavity 131 and in the second cavity 132. There is no problem of cross-cavity of the coolant, thereby ensuring the stability of the coolant flow.

[0107] At the same time, the tuyere sleeve 100 uses a reinforcing column 140 to support the outer sleeve 120 and the inner sleeve 110, which greatly improves the overall structural strength, well suppresses overall deformation, and has high reliability. In addition, the reinforcing column 140 can transfer the heat of the outer sleeve 120 to the coolant in the first cavity 131 and the second cavity 132, thereby realizing the function of directional heat conduction.

[0108] After the reinforcing column 140 is introduced into the tuyere sleeve 100, the present application has a high degree of integration, can increase the heat exchange area, enhance the heat exchange effect, and reduce the temperature of the tuyere sleeve 100. At the same time, the reinforcing column 140 can support the outer sleeve 120 and the inner sleeve 110 to ensure the structural strength of the tuyere sleeve 100, and is suitable for large-capacity and more extremely high-temperature blast furnaces.

[0109] See also Figures 1 to 4 The present application also provides a blast furnace, comprising a furnace body and a tuyere sleeve 100 as described in any of the above embodiments. The tuyere sleeve 100 is arranged at the entrance of the furnace body, and one end of the tuyere sleeve 100 extends into the furnace body.

[0110] After the blast furnace of the present application adopts the tuyere sleeve 100 of the above embodiment, the heat exchange effect of the tuyere sleeve 100 can be guaranteed, the wear and melting loss of the tuyere sleeve 100 caused by high temperature can be reduced as much as possible, and the service life of the tuyere sleeve 100 can be extended, thereby ensuring the normal operation of the blast furnace.

[0111] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0112] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A small air outlet sleeve, characterized in that: include: An inner sleeve, wherein the inner sleeve has an air supply hole extending through the axial direction; An outer sleeve is sleeved on the inner sleeve, and the outer sleeve is sealed to the inner sleeve at both axial ends, the inner sleeve and the outer sleeve are arranged to form an annular installation cavity, and the installation cavity is sleeved on the outer side of the air supply hole; as well as A plurality of reinforcing columns are radially arranged in the installation cavity, and there are intervals between adjacent reinforcing columns. Two ends of each reinforcing column are respectively connected to the outer wall of the inner sleeve and the inner wall of the outer sleeve.

2. The tuyere sleeve according to claim 1, characterized in that: A plurality of the reinforcing columns are arranged at intervals along the axial direction and the circumferential direction of the inner sleeve; And / or, the plurality of reinforcing columns are evenly or unevenly distributed in the installation cavity.

3. The tuyere sleeve according to claim 1, characterized in that: Along the axial direction of the inner sleeve, two adjacent reinforcing columns are arranged in a staggered manner in the circumferential direction.

4. The tuyere sleeve according to claim 1, characterized in that: The reinforcement columns are arranged in a sparse and dense manner according to the temperature of the tuyere sleeve.

5. The tuyere sleeve according to claim 1, characterized in that: The reinforcing column is in the shape of a cylinder, a prism, an elliptical column, a plate or a rib; And / or, the diameters of the circumscribed circles of the reinforcing columns are the same or different; And / or, the cross-sectional areas of the reinforcing columns along the radial direction are equal, or the cross-sectional areas of the reinforcing columns along the radial direction decrease or increase.

6. The tuyere sleeve according to claim 1, characterized in that: The tuyere sleeve also includes a liquid inlet pipe and a liquid outlet pipe, and both the liquid inlet pipe and the liquid outlet pipe are connected to the installation cavity.

7. The tuyere sleeve according to any one of claims 1 to 6, characterized in that: The installation cavity at least includes a first cavity and a second cavity which are independent of each other, and the first cavity and the second cavity are arranged in sequence along the axial direction; The plurality of reinforcing columns are disposed in the first cavity and / or the second cavity.

8. The tuyere sleeve according to claim 7, characterized in that: The air outlet sleeve also includes a partition, which is arranged in the installation cavity and is sealed and connected to the outer wall of the inner sleeve and the inner wall of the outer sleeve; The partition plate can separate the installation cavity into the first cavity and the second cavity which are independent of each other.

9. The tuyere sleeve according to claim 7, characterized in that: The liquid inlet pipe of the tuyere sleeve includes a first inlet pipe and a second inlet pipe, and the liquid outlet pipe of the tuyere sleeve includes a first outlet pipe and a second outlet pipe; The first inlet pipe and the first outlet pipe pass through the second cavity and are connected to the first cavity, and the first inlet pipe and the second outlet pipe pass through the intervals between the adjacent reinforcement columns; The second inlet pipe and the second outlet pipe are communicated with the second cavity.

10. A blast furnace, characterized in that: It comprises a furnace body and a tuyere sleeve as claimed in any one of claims 1 to 9; The tuyere sleeve is arranged at the entrance of the furnace body, and one end of the tuyere sleeve extends into the furnace body.

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