Tuyere small sleeve and blast furnace

Abstract

The present application relates to a tuyere sleeve and a blast furnace. The tuyere sleeve comprises: a sleeve body, including an inner sleeve and an outer sleeve, the inner sleeve and the outer sleeve are arranged to form an annular installation cavity; a plurality of partitions are arranged at intervals around the circumference of the inner sleeve at the front end of the installation cavity, each partition extends radially, and adjacent partitions, the outer wall of the inner sleeve and the inner wall of the outer sleeve are arranged to form a cooling channel, each cooling channel is connected to the installation cavity; and a baffle is sleeved between the inner sleeve and the outer sleeve and connected to each baffle, the baffle divides each cooling channel into a first flow channel, a connecting flow channel and a second flow channel that are connected, and the coolant flows from the first flow channel to the second flow channel through the connecting flow channel. The plurality of partitions can support the inner sleeve and the outer sleeve in the installation cavity, increase the structural strength, and at the same time, the coolant can contact the partition, the outer wall of the inner sleeve and the inner wall of the outer sleeve in the cooling channel, improve the heat exchange effect, reduce the wear and melting loss caused by high temperature to the tuyere sleeve as much as possible, and extend the service life of the tuyere sleeve.

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 tuyere sleeves. 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 front cavity of the tuyere sleeve is damaged very quickly, and can only rely on the rear cavity to resist.

[0004] The front cavity of the tuyere sleeve goes deep into the furnace and faces a greater risk of high temperature and damage. Once the front cavity is damaged, the entire tuyere sleeve will be destroyed immediately and cannot be used. In a sense, the life of the front cavity also determines the life of the entire sleeve. The double-cavity tuyere sleeve only improves the life of the tuyere sleeve to a certain extent.

[0005] 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, resulting in different degrees of wear and melting loss under high temperature. Summary of the invention

[0006] 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.

[0007] A small air outlet sleeve, comprising:

[0008] The sleeve body comprises an inner sleeve and an outer sleeve, wherein the outer sleeve is arranged outside the inner sleeve and is sealed and connected to both ends of the inner sleeve in the axial direction, and the inner sleeve and the outer sleeve are arranged to form an annular installation cavity;

[0009] A plurality of baffles are arranged at intervals around the circumference of the inner sleeve at the front end of the installation cavity, each of the baffles extends radially, and adjacent baffles, the outer wall of the inner sleeve and the inner wall of the outer sleeve are arranged to form a cooling channel, and each of the cooling channels is connected to the installation cavity; and

[0010] The baffle is arranged between the inner sleeve and the outer sleeve and connected to each of the partitions. The baffle divides each of the cooling channels into a first flow channel, a connecting flow channel and a second flow channel that are interconnected. The coolant flows from the first flow channel through the connecting flow channel into the second flow channel.

[0011] In one embodiment of the present application, the surface of the partition away from the front end is an arc-shaped surface, and the arc-shaped surface is concavely arranged on the partition;

[0012] The baffle is located in the middle area of ​​the arc surface.

[0013] In one embodiment of the present application, the baffle includes a protruding portion and a partitioning portion, the protruding portion is arranged on the partitioning portion, and the protruding portion protrudes from an end portion of the baffle away from the front end;

[0014] The partition is connected to each of the partitions and is located in the cooling channel to divide the cooling channel into the first flow channel, the connecting flow channel and the second flow channel.

[0015] In one embodiment of the present application, the protruding portion of the baffle and the inner wall of the outer sleeve are further arranged to form a first confluence cavity, and the first confluence cavity is connected to each of the first flow channels;

[0016] The protruding portion of the baffle and the outer wall of the inner sleeve are further arranged to form a second confluence cavity, and the second confluence cavity is connected to each of the second flow channels.

[0017] In one embodiment of the present application, the baffle includes a connecting body and a plurality of blocking portions, the plurality of blocking portions are arranged on the connecting body at intervals along the circumferential direction, the connecting body is arranged on a plurality of the baffles, and each of the blocking portions is arranged in one of the cooling channels;

[0018] The blocking portion divides the cooling channel into the first flow channel, the connecting flow channel, and the second flow channel.

[0019] In one embodiment of the present application, the partition has a recessed portion, and the baffle is arranged in a ring shape;

[0020] The baffle is sealably disposed in the recessed portion and located in the cooling channel to separate the cooling channel into the first flow channel, the connecting flow channel and the second flow channel.

[0021] In one embodiment of the present application, the number of the installation cavities is at least two, which are independent first cavities and second cavities, and the first cavities and the second cavities are sequentially arranged along the axial direction;

[0022] The baffle plate and the plurality of partition plates are disposed in the first cavity, or the baffle plate and the plurality of partition plates are disposed in the first cavity and the second cavity.

[0023] In one embodiment of the present application, the plurality of partitions are evenly distributed in the installation cavity, or the plurality of partitions are unevenly distributed in the installation cavity and are arranged in a sparse or dense manner according to the thermal environment of the installation cavity;

[0024] and / or, the cross-sectional dimensions of the partition gradually decrease along the radial direction;

[0025] And / or, the partition is in the shape of a plate or a sheet, or the surface of the partition is in the shape of a curve, a straight line, or a combination of a straight line and a curve.

[0026] In one embodiment of the present application, the tuyere sleeve further includes a liquid inlet pipe and a liquid outlet pipe, the liquid inlet pipe is connected to each of the first flow channels, and the liquid outlet pipe is connected to each of the second flow channels.

[0027] A blast furnace, comprising a furnace body and a tuyere sleeve as described in any one of the above technical features;

[0028] The tuyere sleeve is arranged at the entrance of the furnace body, and one end of the tuyere sleeve extends into the furnace body.

[0029] After adopting the above technical solution, this application has at least the following technical effects:

[0030] The tuyere sleeve and blast furnace of the present application, in which the sleeve body is surrounded by an inner sleeve and an outer sleeve to form an annular and sealed installation cavity, a plurality of partitions are arranged at the front end of the installation cavity and extend toward the rear end of the installation cavity, and adjacent partitions, the outer wall of the inner sleeve and the inner wall of the outer sleeve are surrounded to form a cooling channel for the flow of coolant. The baffle is arranged between the inner sleeve and the outer sleeve and connected to each baffle, and the baffle divides the cooling channel into a first flow channel, a connecting flow channel and a second flow channel. The coolant enters from the first flow channel and flows out of the second flow channel through the connecting flow channel, and the coolant can contact and exchange heat with the partition, the outer wall of the inner sleeve and the inner wall of the outer sleeve during the flow.

[0031] The tuyere sleeve has a plurality of partitions arranged at the front end of the installation cavity, and the plurality of partitions are arranged at the front end of the installation cavity to form a plurality of cooling channels extending radially. The baffle is arranged behind the plurality of partitions to separate the cooling channels into a first channel, a cooling channel and a second channel. The plurality of partitions can support the inner sleeve and the outer sleeve in the installation cavity, thereby increasing the structural strength of the tuyere sleeve. At the same time, the coolant can contact the partitions, the outer wall of the inner sleeve and the inner wall of the outer sleeve in the cooling channel, thereby increasing the heat exchange area and improving the heat exchange effect. Moreover, the partition can transfer the heat of the outer sleeve to the coolant, thereby playing a role of directional heat conduction, further strengthening the heat exchange, and minimizing the wear and melting loss of the tuyere sleeve caused by high temperature, thereby extending the service life of the tuyere sleeve. Moreover, the tuyere sleeve adopts partitions to increase the heat exchange area, and its structure is simple, easy to form, and low in cost, thereby facilitating low-cost mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] FIG. 1 is a schematic diagram of a tuyere sleeve according to an embodiment of the present application.

[0033] FIG. 2 is a cross-sectional view of the tuyere sleeve shown in FIG. 1 .

[0034] FIG. 3 is a partial schematic diagram of the tuyere sleeve shown in FIG. 2 .

[0035] FIG. 4 is a cross-sectional view of the tuyere sleeve shown in FIG. 3 at AA.

[0036] FIG. 5 is a schematic diagram of the tuyere sleeve shown in FIG. 3 at position BB.

[0037] FIG. 6 is a schematic diagram of the tuyere sleeve shown in FIG. 3 at CC.

[0038] FIG. 7 is a partial stereoscopic view of the tuyere sleeve shown in FIG. 3 .

[0039] FIG8 is a cross-sectional view of the tuyere sleeve shown in FIG7 at DD.

[0040] FIG. 9 is a cross-sectional view of the tuyere sleeve shown in FIG. 7 at EE.

[0041] FIG. 10 is a schematic diagram of heat exchange of the tuyere jacket shown in FIG. 2 .

[0042] Among them: 100, air outlet sleeve; 110, sleeve body; 111, inner sleeve; 1111, air supply hole; 112, outer sleeve; 113, installation cavity; 1131, first cavity; 1132, second cavity; 114, first end plate; 115, second end plate; 120, partition; 121, cooling channel; 1211, first flow channel; 1212, connecting flow channel; 1213, second flow channel; 122, first confluence cavity; 123, second confluence cavity; 130, baffle; 131, protrusion; 132, partition; 140, liquid inlet pipe; 150, liquid outlet pipe. DETAILED DESCRIPTION

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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 front cavity of the tuyere sleeve is damaged very quickly, and it can only rely on the rear cavity to resist. It only improves the life of the tuyere sleeve to a certain extent. 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.

[0050] Referring to Figures 1 and 2, the present application provides a tuyere sleeve 100. Figure 1 is a schematic diagram of a tuyere sleeve 100 according to an embodiment of the present application, and Figure 2 is a cross-sectional view of the tuyere sleeve 100 shown in Figure 1. 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, and hot air or auxiliary fuel is transported to the blast furnace through the tuyere sleeve 100 to ensure the combustion performance of the blast furnace.

[0051] 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.

[0052] The specific structure of the tuyere sleeve 100 according to an embodiment is introduced below.

[0053] Referring to FIGS. 2 to 9 , in one embodiment, the tuyere sleeve 100 includes a sleeve body 110, a plurality of partitions 120 and a baffle 130. The sleeve body 110 includes an inner sleeve 111 and an outer sleeve 112. The outer sleeve 112 is sleeved on the outer side of the inner sleeve 111 and is sealed and connected to both ends of the inner sleeve 111 in the axial direction. The inner sleeve 111 and the outer sleeve 112 are arranged to form an annular installation cavity 113. A plurality of partitions 120 are arranged at intervals around the circumference of the inner sleeve 111 at the front end of the installation cavity 113. Each of the partitions 120 extends radially. Adjacent partitions 120, the outer wall of the inner sleeve 111 and the inner wall of the outer sleeve 112 are arranged to form a cooling channel 121. Each of the cooling channels 121 is connected to the installation cavity 113.

[0054] The baffle 130 is sleeved between the inner sleeve 111 and the outer sleeve 112, and connected to each of the partitions 120. The baffle 130 divides each of the cooling channels 121 into a first flow channel 1211, a connecting flow channel 1212, and a second flow channel 1213 that are interconnected. The coolant flows from the first flow channel 1211 through the connecting flow channel 1212 into the second flow channel 1213. Fig. 3 is a partial schematic diagram of the tuyere sleeve 100 shown in Fig. 2, Fig. 4 is a cross-sectional view of the tuyere sleeve 100 shown in Fig. 3 at AA, Fig. 5 is a schematic diagram of the tuyere sleeve 100 shown in Fig. 3 at BB, Fig. 6 is a schematic diagram of the tuyere sleeve 100 shown in Fig. 3 at CC, Fig. 7 is a partial stereoscopic view of the tuyere sleeve 100 shown in Fig. 3, Fig. 8 is a cross-sectional view of the tuyere sleeve 100 shown in Fig. 7 at DD, and Fig. 9 is a cross-sectional view of the tuyere sleeve 100 shown in Fig. 7 at EE.

[0055] The sleeve body 110 is the main shell of the air outlet sleeve 100. The sleeve body 110 is arranged in an annular shape and extends in the axial direction. The axial direction here refers to the central axis direction of the sleeve body 110, the circumferential direction refers to the circumferential direction of the sleeve body 110, and the radial direction refers to the radial direction of the sleeve body 110. The circumferential direction, axial direction and radial direction in this application are all based on the sleeve body 110, and will not be repeated in the following text.

[0056] Moreover, the sleeve body 110 has a front end and a rear end, the front end of the sleeve body 110 is the right end of the sleeve body 110, and the rear end of the sleeve body 110 is the left end of the sleeve body 110. The concept of the front end and the rear end is applicable to other components and will not be repeated in the following text. Moreover, the front end of the sleeve body 110 is installed in the furnace body of the blast furnace to transport hot air or auxiliary fuel to the blast furnace.

[0057] Specifically, the sleeve body 110 includes an inner sleeve 111 and an outer sleeve 112, both of which are arranged in an annular shape, that is, both of the inner sleeve 111 and the outer sleeve 112 are hollow structures. The hollow cavity of the inner sleeve 111 is an air supply hole 1111, which is arranged to penetrate along the axial direction, and the tuyere sleeve 100 can transport hot air to the blast furnace or inject auxiliary fuel through the air supply hole 1111.

[0058] The outer sleeve 112 is sleeved on the outside of the inner sleeve 111, and the axial ends of the outer sleeve 112 are sealed with the axial ends of the inner sleeve 111. The outer wall of the inner sleeve 111 and the inner wall of the outer sleeve 112 form a hollow cavity, which is the installation cavity 113. The installation cavity 113 is arranged in a ring shape and is sleeved on the air supply hole 1111.

[0059] It is worth noting that the tuyere sleeve 100 can be a single-cavity structure or a multi-cavity structure. When the tuyere sleeve 100 is a single-cavity structure, the tuyere sleeve 100 includes one installation cavity 113 , and when the tuyere sleeve 100 is a multi-cavity structure, the tuyere sleeve 100 includes at least two independent installation cavities 113 .

[0060] It is worth noting that no matter whether the air outlet sleeve 100 is a single-cavity structure or a multi-cavity structure, the layout of the baffle 130 and the multiple partitions 120 in the installation cavity 113 is the same. Here, the specific layout of the baffle 130 and the multiple partitions 120 in the installation cavity 113 is first described, and the application of the baffle 130 and the multiple partitions 120 in the single-cavity structure and the multi-cavity structure is described in detail later.

[0061] The right side of the installation cavity 113 is the front end, and the left side is the rear end. A plurality of baffles 120 are arranged at the front end of the installation cavity 113 around the circumference of the inner sleeve 111, and the plurality of baffles 120 are arranged radially and extend axially. As shown in FIG5 and FIG7, the plurality of baffles 120 are radially arranged on the outside of the inner sleeve 111. The baffles 120 are sealed and connected to the outer wall of the inner sleeve 111 and the inner wall of the outer sleeve 112.

[0062] In this way, the partition 120 can enclose the end of the installation cavity 113 into a plurality of independent cooling channels 121. After the coolant enters the installation cavity 113, it can enter each cooling channel 121 respectively, and contact the partition 120, the outer wall of the inner sleeve 111 and the inner wall of the outer sleeve 112, thereby realizing heat exchange between the coolant and the partition 120, the inner sleeve 111 and the outer sleeve 112.

[0063] The baffle 130 is sleeved on the outer side of the inner sleeve 111 and is located between the inner sleeve 111 and the outer sleeve 112. The baffle 130 is also staggeredly connected to each partition 120, and the baffle 130 also extends axially into the cooling channel 121 to divide the cooling channel 121 into a first flow channel 1211, a connecting flow channel 1212 and a second flow channel 1213 that are connected.

[0064] There is a certain distance between the baffle 130 and the front end of the installation cavity 113 in the axial direction, that is, there is a certain distance between the front end of the baffle 130 and the inner wall of the front end of the cooling channel 121, so as to form a connecting flow channel 1212. In addition, the baffle 130 also separates the cooling channel 121 in the radial direction to form a first flow channel 1211 and a second flow channel 1213, wherein the first flow channel 1211 is located on the outside and the second flow channel 1213 is located on the inside.

[0065] As shown in Fig. 5, Fig. 6 and Fig. 9, the first flow channel 1211 and the second flow channel 1213 are not connected at the baffle 130, and the first flow channel 1211 and the second flow channel 1213 are connected through the connecting flow channel 1212 at the cooling channel 121 where there is no baffle 130. That is, after the connecting flow channel 1212 connects the first flow channel 1211 and the second flow channel 1213, a return channel can be formed.

[0066] In this way, when the coolant enters the cooling channel 121, the coolant enters the first flow channel 1211, and enters the second flow channel 1213 through the connecting flow channel 1212 and then flows out. The coolant can exchange heat between the inner sleeve 111 and the outer sleeve 112, and reduce the temperature of the inner sleeve 111 and the outer sleeve 112 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.

[0067] The plurality of partitions 120 enclose the installation cavity 113 into a plurality of cooling channels 121, and the baffles 130 separate the cooling channels 121. In this way, a multi-channel structure is formed in the installation cavity 113, and the coolant can flow in each cooling channel 121 and contact and exchange heat with the partitions 120, the inner sleeve 111 and the outer sleeve 112, which greatly increases the heat exchange area and improves the heat exchange efficiency. At the same time, the folded cooling channel 121 can facilitate the flow of the coolant and ensure the stability of the coolant flow.

[0068] Normally, the outer temperature of the outer jacket 112 in the tuyere sleeve 100 is relatively high, and the temperature is usually transferred from the high-temperature part to the low-temperature part. After the partition 120 is arranged radially, the partition 120 can transfer the heat of the outer jacket 112 to the middle, so as to transfer the heat of the outer jacket 112 to the coolant in the cooling channel 121, and realize directional heat conduction according to thermodynamic quantification, thereby further improving the heat exchange effect.

[0069] Moreover, the partition 120 is supported between the outer wall of the inner sleeve 111 and the inner wall of the outer sleeve 112. The partition 120 can support the inner sleeve 111 and the outer sleeve 112, greatly enhancing the overall structural strength of the tuyere sleeve 100, and inhibiting 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.

[0070] At the same time, after the baffle 130 separates the cooling channel 121 into the first flow channel 1211, the connecting flow channel 1212 and the second flow channel 1213, each cooling channel 121 is independently arranged. In this way, after the coolant enters the corresponding cooling channel 121, it can only flow from the corresponding first flow channel 1211 to the second flow channel 1213 through the connecting flow channel 1212, and the problem of cross-cavity will not occur, thereby ensuring the stability of the coolant flow.

[0071] The tuyere sleeve 100 only needs to set a baffle 130 and a plurality of partitions 120 in the installation cavity 113 to increase the heat exchange area while reducing the flow guide member set in the installation cavity 113, so that the tuyere sleeve 100 has a simple structure, a few types of parts, is convenient for molding and processing, and is suitable for low-cost mass production.

[0072] The tuyere sleeve 100 of the above-mentioned embodiment is provided with a plurality of partitions 120 at the front end of the mounting cavity 113. The plurality of partitions 120 are arranged at the front end of the mounting cavity 113 to form a plurality of cooling channels 121 extending radially. The baffle 130 is arranged behind the plurality of partitions 120 to divide the cooling channels 121 into a first flow channel 1211, a connecting flow channel 1212 and a second flow channel 1213. The plurality of partitions 120 can support the inner sleeve 111 and the outer sleeve 112 in the installation cavity 113, thereby increasing the structural strength of the tuyere sleeve 100. At the same time, the coolant can contact the partitions 120, the outer wall of the inner sleeve 111 and the inner wall of the outer sleeve 112 in the cooling channel 121, thereby increasing the heat exchange area and improving the heat exchange effect. In addition, the partitions 120 can transfer the heat of the outer sleeve 112 to the coolant, thereby playing a role in directional heat conduction, further strengthening the heat exchange, minimizing the wear and melting loss of the tuyere sleeve 100 caused by high temperature, and extending the service life of the tuyere sleeve 100. Moreover, the tuyere sleeve 100 uses a plurality of partitions 120 to increase the heat exchange area, has a simple structure, is easy to form, and has low cost, thereby facilitating low-cost mass production.

[0073] 4 to 9 , in one embodiment, a plurality of first flow channels 1211 are arranged around a plurality of second flow channels 1213. That is, in the directions shown in FIGS. 4 to 9 , the first flow channels 1211 are located on the outside and arranged in a circle on the outside, and the second flow channels 1213 are located on the inside and arranged in a circle on the inside.

[0074] Normally, the temperature on the outside of the sleeve body 110 is higher than the temperature on the inside. After the coolant flows from the first flow channel 1211 on the outside to the second flow channel 1213 on the inside, the low-temperature coolant can first exchange heat with the outer sleeve 112 in the first flow channel 1211, and then enter the second flow channel 1213 to exchange heat with the inner sleeve 111, thereby ensuring the heat exchange effect.

[0075] Referring to Fig. 1 and Fig. 2, in one embodiment, the sleeve body 110 is arranged roughly in a conical shape. That is, the inner sleeve 111 and the outer sleeve 112 are arranged roughly in a conical shape, and the entire tuyere sleeve 100 is arranged roughly in a conical shape. In addition, the diameter of the rear end of the tuyere sleeve 100 is greater than the diameter of the front end of the tuyere sleeve 100, and the diameter of the tuyere sleeve 100 gradually decreases from the rear end to the front end.

[0076] Referring to Figures 1 and 2, in one embodiment, the sleeve body 110 also includes an annular first end plate 114 and a second end plate 115, which are located at the axial ends of the inner sleeve 111 and the outer sleeve 112, and seal the axial ends of the inner sleeve 111 and the outer sleeve 112.

[0077] The first end plate 114 is located at the front end of the sleeve body 110, and the second end plate 115 is located at the rear end of the sleeve body 110. The first end plate 114 seals and connects the axial ends of the inner sleeve 111 and the outer sleeve 112 at the front end, and the second end plate 115 seals and connects the axial ends of the inner sleeve 111 and the outer sleeve 112 at the rear end. The inner sleeve 111, the outer sleeve 112, the first end plate 114 and the second end plate 115 are arranged to form an annular installation cavity 113.

[0078] 1 and 2 , in one embodiment, the tuyere sleeve 100 further includes a liquid inlet pipe 140 and a liquid outlet pipe 150, wherein the liquid inlet pipe 140 is connected to each of the first flow channels 1211, and the liquid outlet pipe 150 is connected to each of the second flow channels 1213. The liquid inlet pipe 140 and the liquid outlet pipe 150 are components for inputting and outputting cooling liquid to and from the mounting cavity 113.

[0079] One end of the liquid inlet pipe 140 and the liquid outlet pipe 150 located in the installation cavity 113 are both connected to the installation cavity 113, and the other ends of the liquid inlet pipe 140 and the liquid outlet pipe 150 are respectively connected to a conveying device such as a circulation pump, a cold source, etc. The conveying device conveys the coolant to the installation cavity 113 through the liquid inlet pipe 140, and recovers the coolant in the installation cavity 113 through the liquid outlet pipe 150.

[0080] In addition, the liquid inlet pipe 140 is connected to each first flow channel 1211, and the liquid outlet pipe 150 is connected to each second flow channel 1213. After the liquid inlet pipe 140 delivers the coolant to the installation cavity 113, the coolant can be divided into each first flow channel 1211, and then enter the second flow channel 1213 through the corresponding connecting flow channel 1212, and then enter the liquid outlet pipe 150 to flow out. In this way, the coolant is continuously delivered to the installation cavity 113.

[0081] After the coolant enters each first flow channel 1211, the coolant can contact and exchange heat with the partition 120, the baffle 130 and the inner wall of the outer sleeve 112. After the coolant absorbs heat, it enters the second flow channel 1213 through the connecting flow channel 1212. The coolant contacts and exchanges heat with the outer wall of the partition 120, the baffle 130 and the inner sleeve 111. The coolant after absorbing heat flows into the liquid outlet pipe 150 from the second flow channel 1213 and is discharged. In this way, the heat exchange effect of the tuyere sleeve 100 can be guaranteed, so as to 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.

[0082] When the tuyere sleeve 100 is a single-cavity structure, there are one liquid outlet pipe 150 and one liquid inlet pipe 140, and one liquid outlet pipe 150 and one liquid inlet pipe 140 are connected to the installation cavity 113. When the tuyere sleeve 100 is a multi-cavity structure, there are multiple liquid outlet pipes 150 and multiple liquid inlet pipes 140, and the number of liquid outlet pipes 150 and the number of liquid inlet pipes 140 are equal to the number of installation cavities 113, and each installation cavity 113 corresponds to one liquid outlet pipe 150 and one liquid inlet pipe 140.

[0083] Optionally, the liquid inlet pipe 140 is located above the sleeve body 110, and the liquid outlet pipe 150 is located below the sleeve body 110. It can be understood that the upper part of the sleeve body 110 is usually a higher temperature area. After the liquid inlet pipe 140 is arranged at the upper part, the coolant can directly enter the first flow channel 1211 in the higher temperature area to ensure the heat exchange effect. Of course, the liquid inlet pipe 140 and the liquid outlet pipe 150 can also be located in the middle area of ​​the rear end of the sleeve body 110. In other embodiments of the present application, the liquid inlet pipe 140 and the liquid outlet pipe 150 can also be arranged at other positions at the rear end of the sleeve body 110.

[0084] In the tuyere sleeve 100, the sleeve body 110, the baffle 130, the multiple inner sleeves 111, the liquid inlet pipe 140 and the liquid outlet pipe 150 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.

[0085] 6 to 9 , in one embodiment, the surface of the partition 120 away from the front end is an arc-shaped surface, and the arc-shaped surface is concavely disposed in the partition 120. The baffle 130 is located in the middle area of ​​the arc-shaped surface.

[0086] The arc-shaped partition 120 can increase the surface area of ​​the partition 120, thereby increasing the contact area between the partition 120 and the coolant and enhancing the heat exchange effect. At the same time, the arc-shaped surface of the partition 120 can also cover the external heating surface of the jacket 112, and all the heat of the external surface is introduced into the coolant, further enhancing the heat exchange, and also enhancing the overall structural strength of the tuyere sleeve 100.

[0087] 6 to 9, in one embodiment, the baffle 130 includes a protrusion 131 and a partition 132, wherein the protrusion 131 is disposed on the partition 132, and the protrusion 131 protrudes from the end of the baffle 120 away from the front end. The partition 132 is connected to each of the baffles 120 and is located in the cooling channel 121 to divide the cooling channel 121 into the first flow channel 1211, the connecting flow channel 1212, and the second flow channel 1213.

[0088] The protrusion 131 is arranged at the rear end of the partition plate 120, and the partition portion 132 is arranged alternately with each partition plate 120. The protrusion 131 is located in the installation cavity 113 and is located on the outside of the cooling channel 121. The partition portion 132 is located in the cooling channel 121, and there is a certain distance between the partition portion 132 and the inner wall of the cooling channel 121.

[0089] In this way, the partition 132 can separate the cooling channel 121 into the connected first flow channel 1211, the cooling flow channel and the second flow channel 1213, and the coolant can exchange heat between the inner sleeve 111 and the outer sleeve 112 to reduce the temperature of the inner sleeve 111 and the outer sleeve 112 as much as possible to ensure the performance of the tuyere sleeve 100.

[0090] Moreover, after the protrusion 131 protrudes from the rear end of the partition 120, the protrusion 131 can separate the installation cavity 113 at the rear end of the partition 120. After the coolant enters the first flow channel 1211, the protrusion 131 can block the flow of the coolant, preventing the coolant from entering the second flow channel 1213 without passing through the first flow channel 1211 and the connecting flow channel 1212, thereby ensuring the stability of the coolant flow.

[0091] In one embodiment, the protrusion 131 and the partition 132 are an integral structure. In this way, the overall structural strength of the baffle 130 can be ensured and the number of parts can be reduced. Of course, in other embodiments of the present application, the protrusion 131 and the partition 132 can also be separately provided and welded.

[0092] 6 to 9, in one embodiment, the protrusion 131 of the baffle 130 and the inner wall of the outer sleeve 112 further form a first confluence cavity 122, and the first confluence cavity 122 is connected to each of the first flow channels 1211. The protrusion 131 of the baffle 130 and the outer wall of the inner sleeve 111 further form a second confluence cavity 123, and the second confluence cavity 123 is connected to each of the second flow channels 1213.

[0093] That is, the protrusion 131, the inner wall of the outer sleeve 112 and the arc surface of the partition 120 form a first confluence cavity 122, and the protrusion 131, the outer wall of the inner sleeve 111 and the arc surface of the partition 120 form a second confluence cavity 123. The first confluence cavity 122 and the second confluence cavity 123 are part of the installation cavity 113 and are independent of each other.

[0094] The first confluence cavity 122 connects the liquid inlet pipe 140 and the plurality of first flow channels 1211. The coolant in the liquid inlet pipe 140 first converges in the first confluence cavity 122, and then flows from the first confluence cavity 122 into each of the first flow channels 1211, so that the coolant can enter each of the first flow channels 1211 roughly evenly.

[0095] The second confluence cavity 123 connects the liquid outlet pipe 150 and a plurality of second flow channels 1213. The coolant in each second flow channel 1213 first converges in the second confluence cavity 123 and then enters the liquid outlet pipe 150 to flow out of the installation cavity 113. In this way, the coolant in each second flow channel 1213 can flow out roughly evenly.

[0096] In one embodiment of the present application, the baffle 130 includes a connecting body and a plurality of blocking portions, the plurality of blocking portions are arranged at intervals along the circumferential direction on the connecting body, the connecting body is arranged on a plurality of the partitions 120, and each of the blocking portions is arranged in one of the cooling channels 121. The blocking portions divide the cooling channel 121 into the first flow channel 1211, the connecting flow channel 1212, and the second flow channel 1213.

[0097] The connecting body is arranged in an annular shape, and a plurality of blocking parts are arranged at the front end of the connecting body, and adjacent blocking parts are arranged at intervals, and there is a preset spacing between the blocking parts. In this way, the plurality of blocking parts form a tooth-like structure at one end of the connecting body.

[0098] A partition 120 is installed between the two blocking parts, and the blocking part extends into the cooling channel 121 between the two partitions 120. In this way, the baffle 130 can be conveniently sealed and connected with the plurality of partitions 120, and the blocking part can be ensured to separate the cooling channel 121 into the first flow channel 1211, the cooling flow channel and the second flow channel 1213 that are connected, and the coolant can perform heat exchange with the inner sleeve 111 and the outer sleeve 112, and reduce the temperature of the inner sleeve 111 and the outer sleeve 112 as much as possible, so as to ensure the performance of the tuyere sleeve 100.

[0099] In another embodiment of the present application, the partition plate 120 has a recessed portion, and the baffle plate 130 is arranged in an annular shape. The baffle plate 130 is sealed and arranged in the recessed portion and is located in the cooling channel 121 to separate the cooling channel 121 into the first flow channel 1211, the connecting flow channel 1212 and the second flow channel 1213.

[0100] That is to say, the baffle 130 is an integral annular structure, and the middle part of the multiple partitions 120 has a recessed portion, and the recessed portions are connected through the cooling channel 121 to form an annular groove. The annular baffle 130 is stuck in the recessed portion, and the baffle 130 is also located in the cooling channel 121.

[0101] In this way, the staggered sealing connection between the baffle 130 and the multiple partitions 120 is achieved, and the baffle 130 is ensured to separate the cooling channel 121 into a connected first flow channel 1211, a cooling flow channel and a second flow channel 1213. The coolant can exchange heat with the inner sleeve 111 and the outer sleeve 112, and reduce the temperature of the inner sleeve 111 and the outer sleeve 112 as much as possible to ensure the performance of the tuyere sleeve 100.

[0102] 2 , in one embodiment, the installation cavity 113 includes at least an independent first cavity 1131 and a second cavity 1132, and the first cavity 1131 and the second cavity 1132 are sequentially arranged along the axial direction. The baffle 130 and the plurality of baffles 120 are arranged in the first cavity 1131, or the baffle 130 and the plurality of baffles 120 are arranged in the first cavity 1131 and the second cavity 1132.

[0103] That is to say, the tuyere sleeve 100 is a double-cavity structure, and the two installation cavities 113 are respectively a first cavity 1131 and a second cavity 1132. The first cavity 1131 is located at the front end of the tuyere sleeve 100, that is, the front cavity, and the second cavity 1132 is located at the rear end of the tuyere sleeve 100, that is, the rear cavity. The first cavity 1131 and the second cavity 1132 are independent and not connected, that is, the first cavity 1131 and the second cavity 1132 contain coolant respectively, and the coolant will not flow in the first cavity 1131 and the second cavity 1132.

[0104] The coolant in the first cavity 1131 and the second cavity 1132 is used to exchange heat with the inner sleeve 111 and the outer sleeve 112 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. In addition, the baffle 130 and the plurality of partitions 120 can be arranged in the first cavity 1131, or in the first cavity 1131 and the second cavity 1132.

[0105] Of course, in other embodiments of the present application, the tuyere sleeve 100 can also be any cavity structure. It is worth noting that the structure of the baffle 130 and the partition 120 can be applied to a tuyere sleeve 100 with a single cavity structure, a tuyere sleeve 100 with a double cavity structure, or a tuyere sleeve 100 with any cavity structure.

[0106] Referring to FIGS. 2 to 9 , in this embodiment, a baffle 130 and a partition 120 are provided in the first cavity 1131, and a deflector is still provided in the second cavity 1132 in the current manner. The deflector is a prior art and will not be described in detail here. FIGS. 3 to 9 show a schematic diagram of the structure of the first cavity 1131 in the air outlet sleeve 100. The baffle 130 and the partition 120 in the first cavity 1131 increase the contact area with the coolant and enhance the heat exchange effect.

[0107] Of course, in other embodiments of the present application, baffles 130 and partitions 120 may be provided in both the first cavity 1131 and the second cavity 1132. The principle is substantially the same as the principle of providing baffles 130 and partitions 120 in the installation cavity 113 described above, and will not be repeated here.

[0108] Referring to FIG. 4 to FIG. 9 , in one embodiment, the plurality of baffles 120 are evenly distributed in the installation cavity 113. That is, the plurality of baffles 120 are evenly distributed along the circumference, and the circumferential distance between two adjacent baffles 120 is equal. The evenly distributed plurality of baffles 120 can increase the heat exchange area, improve the heat exchange efficiency, and effectively reduce the temperature of the tuyere sleeve 100.

[0109] In this embodiment, the front end of the installation cavity 113 is surrounded by a plurality of baffles 120 to form 45 cooling channels 121. In this way, the plurality of baffles 120 can effectively relieve the stress of the tuyere sleeve 100 while reducing the temperature of the tuyere sleeve 100. Compared with the tuyere sleeve 100 without the baffles 120, the stress is reduced by about 100 MPa. Of course, in other embodiments of the present application, the front end of the installation cavity 113 can also be surrounded by a plurality of baffles 120 to form other numbers of cooling channels 121.

[0110] In one embodiment, the plurality of baffles 120 are non-uniformly distributed in the installation cavity 113, and are arranged in a sparse and dense manner according to the thermal environment of the installation cavity 113. That is, the plurality of baffles 120 are non-uniformly distributed along the circumference, and the circumferential distance between two adjacent baffles 120 is not equal. The non-uniformly distributed plurality of baffles 120 can increase the heat exchange area, improve the heat exchange efficiency, and effectively reduce the temperature of the tuyere sleeve 100.

[0111] At the same time, the plurality of partitions 120 can also be arranged densely according to the temperature of the tuyere sleeve 100. That is, the plurality of partitions 120 can be non-uniformly distributed at high temperature parts and low temperature parts according to the thermal environment, that is, the plurality of partitions 120 are non-uniformly distributed in the front end of the installation cavity 113 according to the temperature of the cavity, the partitions 120 are densely arranged at the high temperature parts, and the partitions 120 are sparsely arranged at the low temperature parts.

[0112] Generally, the temperature above the tuyere sleeve 100 is higher. In this case, denser partitions 120 can be set at the corresponding upper position, and sparser partitions 120 can be set at the rest. In this way, multiple partitions 120 can increase the heat exchange area at the upper part, improve the heat exchange efficiency, and achieve a better heat exchange effect.

[0113] 4 and 5 , in one embodiment, the cross-sectional dimensions of the partition 120 gradually decrease along the radial direction. In other words, the partition 120 is radially arranged, so that the cross-sectional dimensions of the cooling channel 121 can be ensured, thereby facilitating the flow of the coolant.

[0114] Referring to FIG. 3 to FIG. 9 , in one embodiment, the partition 120 is in the shape of a plate. The plate-shaped partition 120 can effectively separate the installation cavity 113 and ensure the heat exchange area of ​​the tuyere sleeve 100. Of course, in other embodiments of the present application, the partition 120 can also be in the shape of a sheet or the surface of the partition 120 is a curve, a straight line, or a combination of a straight line and a curve.

[0115] The tuyere sleeve 100 of the present application has two installation cavities 113 set in the sleeve body 110, which are a first cavity 1131 and a second cavity 1132 respectively. A plurality of partitions 120 and baffles 130 are set in the first cavity 1131 to enclose a cooling channel 121. The plurality of partitions 120 can contact with the coolant to 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.

[0116] As shown in Fig. 10, Fig. 10 is a heat exchange schematic diagram of the tuyere jacket 100 shown in Fig. 2. The first cavity 1131 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 112 into the coolant in the first cavity 1131. The coolant in the first cavity 1131 completes a heat exchange cycle through the liquid inlet pipe 140, the cooling channel 121 and the liquid outlet pipe 150, and conducts away the heat.

[0117] The second cavity 1132 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 1132 from the outer wall surface of the outer jacket 112. The coolant in the second cavity 1132 completes a heat exchange cycle through the liquid inlet pipe 140, the second cavity 1132 and the liquid outlet pipe 150 to conduct the heat away.

[0118] The tuyere jacket 100 with the partition 120 in the present application is experimentally compared with the tuyere jacket 100 without the partition 120: the multiple partitions 120 and the baffles 130 are arranged in the first cavity 1131, which greatly increases the heat exchange area, and increases the heat exchange area by 30% compared with the tuyere jacket without the partition, which significantly improves the heat exchange effect. Moreover, during the heat exchange process, the partition 120 conducts the temperature from the outer wall of the jacket 112 to the coolant in the cooling channel 121, and the outer shell temperature of the tuyere jacket without the partition is reduced by about 60°C, which further improves the heat exchange effect.

[0119] The tuyere sleeve 100 of the present application has a simple structure and is easy to form. A plurality of partitions 120 and baffles 130 are arranged in the installation cavity 113, and coolant is transported through a liquid inlet pipe 140 and a liquid outlet pipe 150. Compared with the current tuyere sleeve 100 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.

[0120] Moreover, in the tuyere sleeve 100, the first cavity 1131 eliminates the guide member in the prior art. The first cavity 1131 is an independent and complete cavity. The coolant flows independently in each cooling channel 121 of the first cavity 1131. The coolant will not have the problem of cross-cavity, thereby ensuring the stability of the coolant flow.

[0121] At the same time, the tuyere sleeve 100 uses a partition 120 to support the outer sleeve 112 and the inner sleeve 111, which greatly improves the overall structural strength, well suppresses overall deformation, and has high reliability. In addition, the partition 120 can also transfer the heat of the outer sleeve 112 to the coolant in the cooling channel 121, thereby realizing the function of directional heat conduction.

[0122] After introducing multiple partitions 120 and baffles 130 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 problems of the tuyere sleeve 100. At the same time, the partition 120 can also support the outer sleeve 112 and the inner sleeve 111 to ensure the structural strength of the tuyere sleeve 100, which is suitable for large-capacity and more extremely high-temperature blast furnaces.

[0123] 1 and 2 , 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 inlet of the furnace body, and one end of the tuyere sleeve 100 extends into the furnace body.

[0124] 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.

[0125] 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.

[0126] 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: The sleeve body comprises an inner sleeve and an outer sleeve, wherein the outer sleeve is arranged outside the inner sleeve and is sealed and connected to both ends of the inner sleeve in the axial direction, and the inner sleeve and the outer sleeve are arranged to form an annular installation cavity; A plurality of baffles are arranged at intervals around the circumference of the inner sleeve at the front end of the installation cavity, each of the baffles extends radially, and adjacent baffles, the outer wall of the inner sleeve and the inner wall of the outer sleeve are surrounded to form a cooling channel, and each of the cooling channels is connected to the installation cavity; as well as The baffle is arranged between the inner sleeve and the outer sleeve and connected to each of the partitions. The baffle divides each of the cooling channels into a first flow channel, a connecting flow channel and a second flow channel that are interconnected. The coolant flows from the first flow channel through the connecting flow channel into the second flow channel.

2. The tuyere sleeve according to claim 1, characterized in that: The surface of the partition away from the front end is an arc-shaped surface, and the arc-shaped surface is concavely arranged on the partition; The baffle is located in the middle area of ​​the arc surface.

3. The tuyere sleeve according to claim 1, characterized in that: The baffle includes a protruding portion and a partitioning portion, wherein the protruding portion is arranged on the partitioning portion, and the protruding portion protrudes from the end of the baffle away from the front end; The partition is connected to each of the partitions and is located in the cooling channel to divide the cooling channel into the first flow channel, the connecting flow channel and the second flow channel.

4. The tuyere sleeve according to claim 1, characterized in that: The protruding portion of the baffle and the inner wall of the outer sleeve are further arranged to form a first confluence cavity, and the first confluence cavity is connected to each of the first flow channels; The protruding portion of the baffle and the outer wall of the inner sleeve are further arranged to form a second confluence cavity, and the second confluence cavity is connected to each of the second flow channels.

5. The tuyere sleeve according to claim 1, characterized in that: The baffle includes a connecting body and a plurality of blocking parts, wherein the plurality of blocking parts are arranged on the connecting body at intervals along the circumferential direction, the connecting body is arranged on a plurality of the baffles, and each of the blocking parts is arranged in one of the cooling channels; The blocking portion divides the cooling channel into the first flow channel, the connecting flow channel, and the second flow channel.

6. The tuyere sleeve according to claim 1, characterized in that: The partition has a recessed portion, and the baffle is arranged in a ring shape; The baffle is sealably disposed in the recessed portion and located in the cooling channel to separate the cooling channel into the first flow channel, the connecting flow channel and the second flow channel.

7. The tuyere sleeve according to any one of claims 1 to 6, characterized in that: The number of the installation cavities is at least two, which are an independent first cavity and a second cavity, and the first cavity and the second cavity are arranged in sequence along the axial direction; The baffle plate and the plurality of partition plates are disposed in the first cavity, or the baffle plate and the plurality of partition plates are disposed in the first cavity and the second cavity.

8. The tuyere sleeve according to any one of claims 1 to 6, characterized in that: The plurality of partitions are evenly distributed in the installation cavity, or the plurality of partitions are unevenly distributed in the installation cavity and are arranged in a sparse or dense manner according to the thermal environment of the installation cavity; and / or, the cross-sectional dimensions of the partition gradually decrease along the radial direction; And / or, the partition is in the shape of a plate or a sheet, or the surface of the partition is in the shape of a curve, a straight line, or a combination of a straight line and a curve.

9. The tuyere sleeve according to any one of claims 1 to 6, characterized in that: The tuyere sleeve further includes a liquid inlet pipe and a liquid outlet pipe, wherein the liquid inlet pipe is connected to each of the first flow channels, and the liquid outlet pipe is connected to each of the second flow channels.

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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