阅读说明：本技术 一种鼓风炉风嘴结构 (Blast furnace tuyere structure ) 是由 刘冬根 颜永胜 黄大霜 苏飞 于 2021-08-02 设计创作，主要内容包括：本发明公开了一种鼓风炉风嘴结构,涉及包括：风管；内管,套设于所述风管外侧；外管,布置于所述内管的径向外侧位置,内管一端与所述外管一端连接；隔板,设置于所述内管和所述外管之间；进水箱,包括第一接头,第一接头设置于所述内管的另一端；出水箱,包括第二接头,所述第二接头设置于所述第一接头的一侧；以及固定装置,设置于所述内管和所述外管之间,所述固定装置用于固定所述隔板。隔板靠近风嘴的一端固定连接有固定装置来固定隔板,能够有效避免隔板在工作中逐渐向内管与外管的连接部靠近或接触,保证了从第一接头流入的冷却水能够顺利从隔板末端流向第二接头,确保了对风嘴的冷却效果,延长鼓风炉风嘴结构的工作寿命。(The invention discloses a blast furnace tuyere structure, which comprises: an air duct; the inner pipe is sleeved outside the air pipe; the outer pipe is arranged at the radial outer side position of the inner pipe, and one end of the inner pipe is connected with one end of the outer pipe; a separator plate disposed between the inner tube and the outer tube; the water inlet tank comprises a first connector, and the first connector is arranged at the other end of the inner pipe; the water outlet tank comprises a second joint, and the second joint is arranged on one side of the first joint; and a fixing device disposed between the inner tube and the outer tube, the fixing device being used to fix the partition plate. The baffle is fixed to the one end fixedly connected with fixing device that the baffle is close to the tuyere, can effectively avoid the baffle to be close to or the contact to the connecting portion of inner tube and outer tube gradually in work, has guaranteed to follow the terminal flow direction second joint of baffle smoothly from the cooling water that first joint flowed in, has ensured the cooling effect to the tuyere, prolongs the working life of blast furnace tuyere structure.)

1. A tuyere structure of a blast furnace, comprising:

an air duct;

the inner pipe is sleeved outside the air pipe;

an outer tube disposed at a radially outer position of the inner tube, one end of the inner tube being connected to one end of the outer tube;

a separator plate disposed between the inner tube and the outer tube;

the water inlet tank comprises a first joint, and the first joint is arranged at the other end of the inner pipe;

the water outlet tank comprises a second joint, and the second joint is arranged on one side of the first joint; and

and the fixing device is arranged between the inner pipe and the outer pipe and is used for fixing the partition plate.

2. The tuyere structure of a blast furnace according to claim 1, wherein the fixing means includes a fixing block, the partition is connected to a middle portion of the fixing block, and both ends of the fixing block are fixedly connected to the inner tube and the outer tube, respectively.

3. The tuyere structure of a blast furnace as claimed in claim 2, wherein the number of the fixing blocks is three, and the three fixing blocks are provided at intervals along the circumference of the partition plate.

4. The blast furnace tuyere structure of any one of claims 1 to 3, wherein a notch is provided at a position of the inner tube and/or the outer tube adjacent to the fixture, the notch communicating with the outside.

5. The blast furnace tuyere structure of claim 1, wherein a cross-section of a connection portion of the inner tube and the outer tube exhibits a circular arc shape.

6. The blast furnace tuyere structure of claim 1, wherein the first joint and the second joint are respectively provided at different positions in an axial direction of the blast pipe, and installation axes of the first joint and the second joint intersect in space.

7. The blast furnace tuyere structure of claim 6, wherein the installation axes of the first and second joints are each at an angle of 75 ° to the axis of the blast pipe.

8. The blast furnace tuyere structure of claim 1, wherein the outer surface of the partition plate is provided with a first spiral line, the number of heads on the right side of the first spiral line is 3, and the number of heads on the left side of the first spiral line is 6.

9. The blast furnace tuyere structure of claim 8, wherein a pitch of the first spiral line is 150 mm.

10. The blast furnace tuyere structure of claim 1, wherein a filling material is filled between the inner tube and the blast pipe.

Technical Field

The invention relates to the technical field of closed blast furnaces, in particular to a tuyere structure of a closed blast furnace.

Background

In the related technology, in the process of smelting lead and zinc in a closed blast furnace, the air nozzle works in a high-temperature environment of more than 900 ℃, so that the service life of the air nozzle is easily short.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a blast furnace tuyere structure which can effectively prolong the service life of the tuyere.

The blast furnace tuyere structure of the embodiment of the invention comprises: an air duct; the inner pipe is sleeved outside the air pipe; an outer tube disposed at a radially outer position of the inner tube, one end of the inner tube being connected to one end of the outer tube; a separator plate disposed between the inner tube and the outer tube; the water inlet tank comprises a first joint, and the first joint is arranged at the other end of the inner pipe; the water outlet tank comprises a second joint, and the second joint is arranged on one side of the first joint; and a fixing device disposed between the inner tube and the outer tube, the fixing device being used to fix the partition plate.

Further, the fixing device comprises a fixing block, the partition plate is connected to the middle of the fixing block, and two ends of the fixing block are fixedly connected with the inner pipe and the outer pipe respectively.

Furthermore, the number of the fixed blocks is three, and the three fixed blocks are arranged at intervals along the circumference of the partition plate.

Further, a notch is formed in the position, close to the fixing device, of the inner pipe and/or the outer pipe, and the notch is communicated with the outside.

Further, the cross section of the connecting part of the inner pipe and the outer pipe is in a circular arc shape.

Further, the first joint and the second joint are respectively arranged at different positions in the axial direction of the air duct, and installation axes of the first joint and the second joint are intersected in a space.

Further, the installation axis of the first joint or the second joint and the axis of the air pipe form an included angle of 75 degrees.

Further, the outer surface of the partition board is provided with a first spiral line, the number of heads on the right side of the first spiral line is 3, and the number of heads on the left side of the first spiral line is 6.

Further, the pitch of the first spiral line is 150 mm.

Further, a filling material is filled between the inner pipe and the air pipe.

The blast furnace tuyere structure of the embodiment of the invention at least has the following beneficial effects: an inner pipe and an outer pipe are arranged outside the air pipe, and a cavity between the inner pipe and the outer pipe is built into a double-layer annular loop by utilizing a partition plate. The cooling water flows in from the first joint and flows to one end of the air nozzle along the cavity between the partition plate and the inner pipe, then flows to the second joint after entering the gap between the partition plate and the outer pipe from the tail end of the partition plate, and then flows out from the second joint, so that the temperature of the air nozzle is reduced. Because the one end that the baffle is close to the tuyere is provided with fixing device and is used for fixed baffle, can effectively avoid the baffle to be close to or the contact to the connecting portion of inner tube and outer tube gradually in work, make the cooling water that flows in from first joint can connect from the terminal flow direction second of baffle smoothly, ensure that the connecting portion of inner tube and outer tube do not have the cooling dead angle, guaranteed the cooling effect to the tuyere structure, avoided connecting portion not in place to produce the crackle because of the cooling, and then can effectively prolong the working life of blast furnace tuyere structure.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The invention is further described with reference to the following figures and examples, in which:

FIG. 1 is a schematic view of a blast furnace tuyere according to an embodiment of the present invention;

FIG. 2 is a right side view of a blast furnace tuyere structure of an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of A-A of FIG. 1;

FIG. 4 is a partial schematic view of portion B of FIG. 1;

FIG. 5 is a schematic structural diagram of a first spiral in an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a second spiral in an embodiment of the present invention;

FIG. 7 is a schematic view of the connection of the first joint of the outlet tank according to the embodiment of the present invention;

FIG. 8 is a schematic view of the connection of the second joint of the water inlet tank in the embodiment of the invention.

Reference numerals:

the connecting structure comprises a connecting flange 1, an air pipe 11, an inner pipe 12, an outer pipe 13, a partition plate 14, a fixing block 15, a filling material 16, a first joint 21, a second joint 22, a first spiral line 141, a second spiral line 142, a connecting part 100, a notch 200 and a connecting thread 211.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of 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 thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality is one or more, the meaning of a plurality is two or more, and the above, below, exceeding, etc. are understood as excluding the present numbers, and the above, below, within, etc. are understood as including the present numbers. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

In the description of the present invention, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Referring to fig. 1 and 2, a tuyere structure of a blast furnace according to an embodiment of the present invention includes an air pipe 11, an inner pipe 12, an outer appearance, a partition 14, a water inlet tank, a water outlet tank, and a fixing device.

Specifically, the inner pipe 12 is sleeved outside the air pipe 11; the outer tube 13 is arranged at a radially outer position of the inner tube 12, and one end of the inner tube 12 is connected with one end of the outer tube 13; a separator 14 is disposed between the inner tube 12 and the outer tube 13; the water inlet tank comprises a first joint 21, and the first joint 21 is arranged at the other end of the inner pipe 12; the water outlet tank comprises a second joint 22, and the second joint 22 is arranged on one side of the first joint 21; and a fixing means for fixing the partition 14 is provided between the inner pipe 12 and the outer pipe 13.

Wherein one end of the inner tube 12 and the outer tube 13 connected to each other is located at a tuyere end of a tuyere structure of the blast furnace. The blast furnace tuyere structure further comprises a connecting flange 1, and the connecting flange 1 is fixedly connected with one end of the air pipe 11. The other end of the air pipe 11 is a bell mouth which is fixedly connected with the inner pipe 12. The fixing means is discontinuously provided at one end of the partition 14 to ensure that the cooling water can smoothly flow from the first joint 21 to the second joint 22 after bypassing the end of the partition 14.

An inner pipe 12 and an outer pipe 13 are provided outside the air duct 11, and a gap between the inner pipe 12 and the outer pipe 13 is formed as a double-layer loop by a partition 14. The cooling water flows in from the first joint 21 and flows to one end of the tuyere along the gap between the baffle plate 14 and the inner pipe 12, then flows to the second joint 22 after entering the gap between the baffle plate 14 and the outer pipe 13 from the tail end of the baffle plate 14, and then flows out from the second joint 22, thereby reducing the temperature of the tuyere. Because the partition plate 14 is close to the one end fixedly connected with fixing device of tuyere for fixed partition plate 14 can effectively avoid partition plate 14 to be close to or contact with the connecting portion 100 of inner tube 12 and outer tube 13 gradually in work, has guaranteed that the cooling water that flows in from first joint 21 can flow to second joint 22 from partition plate 14 end smoothly, has ensured the cooling effect to the tuyere, can effectively prolong the working life of blast furnace tuyere structure.

In this embodiment, the blast furnace tuyere structure needs to be inspected for defects after being manufactured. The surface of the blast furnace tuyere structure is coated with antirust paint. Before use, the blast furnace tuyere structure is subjected to a hydraulic test.

In one embodiment, the fixing device includes a fixing block 15, the partition 14 is connected to a middle portion of the fixing block 15, and both ends of the fixing block 15 are fixedly connected to the inner tube 12 and the outer tube 13, respectively. On the outer wall of fixed block 15 one end connection and inner tube 12, the other end of fixed block 15 is fixed in the inner wall of outer tube 13, and fixed block 15 is all not on connecting portion 100 with the connecting portion of inner tube 12 and outer tube 13 to there is the cooling dead angle on avoiding connecting portion 100 and lead to connecting portion 100 to produce the crackle, and then prolonged the life of blast furnace tuyere structure. The setting of fixed block 15 can be fixed baffle 14, avoid baffle 14 to be close to and influence the condition that the cooling water flows in blast furnace tuyere structure with the inner wall laminating of outer tube 13 or baffle 14 along 11 axis directions of tuber pipe toward tuyere one end under the washing away of cooling water, and then ensured the cooling effect of cooling water to blast furnace tuyere structure, the temperature that makes blast furnace tuyere structure keeps at reasonable within range, with the life of extension blast furnace tuyere structure.

It is understood that the middle of the fixed block 15 refers to a position between both ends of the fixed block 15, including but not limited to a position at the geometric center of the fixed block 15.

Referring to fig. 3, the number of the fixing blocks 15 is three, and three fixing blocks 15 are arranged at intervals along the circumference of the partition 14. In this embodiment, the axial distance between the fixing blocks 15 and the connecting portion 100 between the inner tube 12 and the outer tube 13 is 20mm, and the three fixing blocks 15 are uniformly arranged at the tail end of the partition plate 14, so that the stability of the partition plate 14 can be improved, and the normal operation of the cooling water is ensured.

As a modification of the above embodiment, the inner tube 12 and/or the outer tube 13 is provided with a notch 200 at a position near the fixing device, and the notch 200 communicates with the outside, as shown in fig. 4. It will be appreciated that the aperture of the gap 200 is small and does not affect the circulation of the cooling water between the first connector 21 and the second connector 22. When the cooling water works, because the water pressure between the inner pipe 12 and the outer pipe 13 is large, a small part of the cooling water can flow to the outside of the air nozzle from the notch 200 to cool the outside of the air nozzle.

In the present embodiment, the diameter of the indentation 200 is 2mm, and the indentation 200 comprises a conical shaped mouth. For the notch 200 communicated with the interior of the tuyere, the small-caliber end of the conical opening of the notch is arranged towards the interior of the tuyere, so that the flow of cooling water flowing out of the notch 200 can be increased, and the cooling effect is improved; the conical opening is arranged, so that the cooling effect of the tuyere is guaranteed, the circulating flow of cooling water at the first joint 21 and the second joint 22 is not influenced, and the whole cooling effect of the tuyere structure of the blast furnace is not influenced. For the notch 200 connected with the outside of the tuyere, the large-caliber end of the conical opening is arranged towards the outside of the tuyere, so that cooling water can cover the pipe wall of the outer pipe 13 in a large range after being ejected from the cooling opening, and the cooling effect on the pipe wall of the outer pipe 13 is improved.

It should be noted that the inside of the tuyere means a tubular space surrounded by the air duct 11, and the outside of the tuyere is opposite to the tubular space.

The cross section of the connection 100 of the inner tube 12 and the outer tube 13 appears as a circular arc, as shown in fig. 4. Because the flow direction of the cooling water needs to be changed at the connecting part 100, the arc-shaped connecting part 100 is beneficial to smooth and smooth turning of the cooling water, the additional vibration of the tuyere caused by the working of the cooling water can be avoided, and the resistance of the tuyere structure of the blast furnace in the embodiment of the invention can be effectively reduced, so that the blast pressure can be reduced, and the equipment guarantee is provided for improving the yield of the crude lead and zinc.

In some embodiments, referring to fig. 1, 5 and 6, the outer surface of the separator 14 is provided with a first helix 141, the number of heads on the right side of the first helix 141 being 3 and the number of heads on the left side of the first helix 141 being 6. The rotation direction of the first spiral line 141 is left-handed. The inner surface of the partition 14 is further provided with a second spiral line 142, the rotation direction is right-handed, the number of heads on the right side of the second spiral line 142 is 3, and the number of heads on the left side is 6. Through such setting, carry out the water conservancy diversion to the cooling water, accelerate the velocity of flow of cooling water in blast furnace tuyere structure, increase the area of contact of blast furnace tuyere structure and cooling water simultaneously to improve cooling efficiency. Further, the pitch of the first and second helical lines 141 and 142 is 150 mm. In the present embodiment, the left side of the first spiral line 141 refers to a side of the first spiral line 141 away from the connection portion 100.

Due to the existence of the first spiral line 141 and the second spiral line 142, the cooling water may generate an acting force on the separator 14, so that the separator 14 may loosen or even fail to be fixed. The arrangement of the fixing block 15 improves the connection reliability of the partition plate 14, thereby ensuring the normal work of cooling water and prolonging the service life of the tuyere structure of the blast furnace.

In one embodiment, the inner tube 12 and the air duct 11 are filled with a filler material 16, and the filler material 16 can prevent the inner tube 12 filled with cooling water from directly contacting the air duct 11.

The first joint 21 and the second joint 22 are respectively provided at different positions in the axial direction of the air duct 11, and the installation axes of the first joint 21 and the second joint 22 intersect in space. Because the first joint 21 and the second joint 22 are a water inlet and a water outlet of cooling water respectively, the cooling water can generate certain impact on a blast furnace tuyere structure during working, and the arrangement positions of the first joint 21 and the second joint 22 should be as close as possible under the condition of meeting the installation convenience of the first joint 21 and the second joint 22. In the embodiment, the included angle of the installation axes of the first joint 21 and the second joint 22 in space is 33.45 degrees, so that the impact of cooling water on the blast furnace tuyere structure can be effectively balanced.

Wherein the mounting axis of the first connector 21 or the second connector 22 forms an angle of 75 ° with the axis of the air duct 11, as shown in fig. 7 and 8. The first joint 21 and the second joint 22 are each provided with a connecting thread 211 for connection with a cooling circulation system. The installation axis of the first joint 21 or the second joint 22 forms an included angle of 75 degrees with the axis of the air pipe 11, so that the cooling water can flow in and out conveniently, and the cooling efficiency is improved.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention. Furthermore, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.