Melting furnace spray gun and melting furnace

Abstract

The invention discloses a smelting furnace spray gun and a smelting furnace, wherein the smelting furnace spray gun comprises an outer tube, an outer tube end tube, an inner tube and an inner tube end tube, a plurality of outer tube end gas supply channels axially penetrating the wall of the outer tube end tube are provided; the outer tube end tube is coaxially arranged with the outer tube and the outer ring portion of one end of the outer tube end tube is welded and fixed with one end of the outer tube; the inner tube is rotatably coaxially arranged in the outer tube, an axial gas supply channel with a ring-shaped cross section is formed between the outer circumference of the inner tube and the inner circumference of the outer tube; the inner tube end tube is coaxially arranged in the outer tube, a plurality of inner tube end gas supply channels axially penetrating the wall of the inner tube end tube are provided; one end of the inner tube end tube is welded and fixed with one end of the inner tube; the other end of the inner tube end tube is pressed against the inner ring portion of one end of the outer tube end tube. The smelting furnace spray gun of the invention can adjust the combustion-supporting gas intake and fuel delivery, has a large adjustment range and effectively guarantees the service life of the smelting furnace spray gun and the smelting furnace.

Description

Technical Field

[0001] The invention relates to the technical field of smelting furnaces, and in particular to a smelting furnace spray gun and a smelting furnace. Background Art

[0002] Existing side-blown furnaces, oxygen-enriched electric heat reduction furnaces and other smelting furnaces all use spray guns. The spray guns can deliver fuel and combustion-supporting gas at the same time, but can only be fine-tuned. For a certain process stage in the production process that does not require the delivery of a large amount of fuel and combustion-supporting gas, the existing spray guns cannot be adjusted to meet the process requirements of this stage. If the existing spray guns are adjusted over a large range, the pressure of the spray gun cannot be guaranteed, which has a great impact on the life of the spray gun and the furnace. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a smelting furnace lance that can adjust the delivery amount of auxiliary fuel and the delivery amount of combustion-supporting gas, has a large adjustment range and effectively ensures the life of the smelting furnace lance and the smelting furnace.

[0004] A smelting furnace spray gun according to a first embodiment of the present invention comprises:

[0005] External pipe;

[0006] An outer tube end tube, wherein a plurality of outer tube end air supply channels are axially penetrated on the wall of the outer tube end tube, and the plurality of outer tube end air supply channels are spaced apart in the circumferential direction; the outer tube end tube is coaxially arranged with the outer tube, and the outer ring portion of one end of the outer tube end tube is welded and fixed to one end of the outer tube; the plurality of outer tube end air supply channels are located in the tube cavity of the outer tube on the radial projection plane;

[0007] An inner tube, the inner tube is rotatably arranged coaxially inside the outer tube, and an axial air supply passage with a ring-shaped cross section is formed between the outer circumference of the inner tube and the inner circumference of the outer tube;

[0008] The inner tube end tube is coaxially arranged in the outer tube, and the wall of the inner tube end tube is provided with a plurality of inner tube end air supply channels axially penetrating therethrough, and the plurality of inner tube end air supply channels are distributed at intervals along the circumferential direction; the inner tube end tube is coaxially arranged with the inner tube and one end of the inner tube end tube is welded and fixed to one end of the inner tube, so that the inner tube end tube and the inner tube can rotate synchronously, and the plurality of inner tube end air supply channels are connected with the axial air supply channel; the other end of the inner tube end tube is pressed against the inner ring portion of one end of the outer tube end tube, so that the lumen of the inner tube, the lumen of the inner tube end tube and the lumen of the outer tube end tube are connected in sequence to form a fuel delivery channel, and at the same time, the axial air supply channel, the inner tube end air supply channel and the outer tube end air supply channel are connected to form a combustion-supporting gas delivery channel; the rotation of the inner tube is used to adjust the alignment degree between the inner tube end air supply channel and the outer tube end air supply channel.

[0009] The smelting furnace spray gun according to the first aspect of the embodiment of the present invention has the following working process: when it is necessary to introduce fuel and combustion-supporting gas into the inside of the smelting furnace, the fuel enters the inner tube from the other end of the inner tube, and then enters the smelting furnace through the tube cavity of the inner tube, the tube cavity of the inner tube end tube and the tube cavity of the outer tube end tube in sequence; the combustion-supporting gas enters the smelting furnace through the combustion-supporting gas air supply channel formed by connecting the axial air supply channel, the inner tube end air supply channel and the outer tube end air supply channel. When the demand for the gas delivery volume of the combustion-supporting gas is the largest, the inner tube is rotated so that the multiple gas delivery channels at the ends of the inner tubes are fully aligned with the multiple gas delivery channels at the ends of the outer tubes one by one. When the combustion-supporting gas delivery volume needs to be reduced, the inner tube is rotated so that the multiple gas delivery channels at the ends of the inner tubes are relatively staggered with the multiple gas delivery channels at the ends of the outer tubes one by one, reducing the overlapping area of ​​the alignment between the two, thereby reducing the cross-sectional area of ​​the gas delivery channels of the combustion-supporting gas, and achieving the effect of adjusting the delivery volume of the combustion-supporting gas. When the combustion-supporting gas does not need to be delivered, the inner tube is rotated so that the multiple gas delivery channels at the ends of the inner tubes are completely staggered with the multiple gas delivery channels at the ends of the outer tubes, that is, the multiple gas delivery channels at the ends of the inner tubes are not connected to the multiple gas delivery channels at the ends of the outer tubes. As a result, the amount of combustion-supporting gas and the amount of fuel delivered by the smelting furnace spray gun can be conveniently adjusted, and the gas ejection speed can be guaranteed while reducing the combustion-supporting gas delivery volume, thereby avoiding clogging of the smelting furnace spray gun and ensuring the life of the smelting furnace spray gun and the smelting furnace. In addition, the adjustable range of the combustion-supporting gas delivery channel of the smelting furnace spray gun is large, which is conducive to the smooth progress of the process operation.

[0010] According to an embodiment of the first aspect of the present invention, the cross-sections of the air delivery channel at the end of the inner tube and the air delivery channel at the end of the outer tube are the same.

[0011] According to an embodiment of the first aspect of the present invention, the outer diameter of the outer tube end tube is the same as the outer diameter of the outer tube and the inner diameter of the outer tube end tube is smaller than the inner diameter of the outer tube, the outer diameter of the inner tube end tube is smaller than the inner diameter of the outer tube, and the inner diameter of the inner tube end tube is the same as the inner diameter of the outer tube end tube.

[0012] According to an embodiment of the first aspect of the present invention, it further includes a combustion-supporting gas seat, in which a combustion-supporting gas inlet cavity is provided, and a first mounting hole and a second mounting hole connected to the combustion-supporting gas inlet cavity are provided on the combustion-supporting gas seat, and the first mounting hole and the second mounting hole are coaxially arranged and distributed on both sides of the combustion-supporting gas seat; the other end of the outer tube is fixed in the first mounting hole; the other end of the inner tube passes through the first mounting hole, the combustion-supporting gas inlet cavity and the second mounting hole and is rotatably supported in the second mounting hole.

[0013] According to a further embodiment of the first aspect of the present invention, the combustion-supporting gas seat comprises a combustion-supporting gas seat body and a sealing cover; the combustion-supporting gas seat body defines the combustion-supporting gas inlet cavity, and the combustion-supporting gas seat body is provided with an opening connected to the combustion-supporting gas inlet cavity; the sealing cover is arranged at the opening and is sealed and fixed to the combustion-supporting gas seat body.

[0014] According to a further embodiment of the first aspect of the present invention, the first mounting hole is arranged on the combustion-supporting gas seat body and is opposite to the opening, and the second mounting hole is arranged on the cover.

[0015] According to a further embodiment of the first aspect of the present invention, a rotating device is installed in the second mounting hole, and the other end of the inner tube is rotatably supported on the rotating device.

[0016] According to some embodiments of the first aspect of the present invention, it further includes a combustion-supporting gas inlet pipe, one end of which is fixed to the combustion-supporting gas seat and the lumen of the combustion-supporting gas inlet pipe is connected to the combustion-supporting gas inlet cavity.

[0017] According to an embodiment of the first aspect of the present invention, it also includes a connecting piece and a head, the connecting piece defines a first channel and a second channel, wherein the other end of the inner tube is installed in one end of the first channel, one end of the second channel intersects and communicates with the first channel, and the head is detachably sealed at the other end of the first channel.

[0018] The second aspect of the present invention also provides a smelting furnace.

[0019] The smelting furnace according to the embodiment of the second aspect of the present invention comprises the smelting furnace spray gun as described in any one of the first aspect of the present invention.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 It is a schematic structural diagram of a smelting furnace spray gun according to an embodiment of the first aspect of the present invention.

[0023] Figure 2 It is a structural schematic diagram of one position of the inner tube, outer tube, inner tube end tube and outer tube end tube of the smelting furnace spray gun according to the first embodiment of the present invention.

[0024] Reference numerals:

[0025] Melting furnace spray gun 1000

[0026] Outer tube 1

[0027] Inner tube 2

[0028] Inner tube end tube 3

[0029] Outer tube end tube 4

[0030] Fuel delivery channel 5

[0031] Combustion-supporting gas delivery channel 6

[0032] Axial air supply channel 601 Inner tube end air supply channel 602 Outer tube end air supply channel 603

[0033] Combustion gas seat 7

[0034] Combustion-supporting gas seat body 701 Combustion-supporting gas inlet cavity 7011

[0035] Cap 702

[0036] Rotating device 8

[0037] Combustion gas inlet pipe 9

[0038] Head 10

[0039] Connector 11 First channel 1101 Second channel 1102 DETAILED DESCRIPTION

[0040] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0041] Combine the following Figure 1 to Figure 2 The smelting furnace spray gun 1000 according to the first embodiment of the present invention will be described.

[0042] like Figure 1 and Figure 2 As shown, a smelting furnace spray gun 1000 according to an embodiment of the first aspect of the present invention comprises an outer tube 1, an outer tube end tube 4, an inner tube 2 and an inner tube end tube 3, a plurality of outer tube end gas supply channels 603 penetrating axially are provided on the wall of the outer tube end tube 4, and the plurality of outer tube end gas supply channels 603 are distributed at intervals in the circumferential direction; the outer tube end tube 4 is coaxially arranged with the outer tube 1, and the outer ring portion of one end of the outer tube end tube 4 is welded and fixed to one end of the outer tube 1; the plurality of outer tube end gas supply channels 603 are located in the tube cavity of the outer tube 1 on the radial projection plane; the inner tube 2 is rotatably coaxially arranged in the outer tube 1, and an axial gas supply channel 601 with a ring-shaped cross section is formed between the outer circumferential surface of the inner tube 2 and the inner circumferential surface of the outer tube 1; the inner tube end tube 3 is coaxially arranged in the outer tube 1, and a plurality of inner tube end gas supply channels penetrating axially are provided on the wall of the inner tube end tube 3 602, multiple inner tube end air supply channels 602 are distributed at intervals along the circumferential direction; the inner tube end tube 3 is coaxially arranged with the inner tube 2 and one end of the inner tube end tube 3 is welded and fixed to one end of the inner tube 2, so that the inner tube end tube 3 and the inner tube 2 can rotate synchronously, and the multiple inner tube end air supply channels 602 are connected with the axial air supply channel 601; the other end of the inner tube end tube 3 is pressed against the inner ring part of one end of the outer tube end tube 4, so that the tube cavity of the inner tube 2, the tube cavity of the inner tube end tube 3 and the tube cavity of the outer tube end tube 4 are connected in sequence to form a fuel delivery channel 5, and at the same time, the axial air supply channel 601, the inner tube end air supply channel 602 and the outer tube end air supply channel 603 are connected to form a combustion-supporting gas delivery channel 6; the inner tube 2 rotates to adjust the alignment degree between the inner tube end air supply channel 602 and the outer tube end air supply channel 603.

[0043] According to the smelting furnace spray gun 1000 of the first aspect of the present invention, the working process is: when it is necessary to introduce fuel and combustion-supporting gas into the inside of the smelting furnace, the fuel enters the inner tube 2 from the other end of the inner tube 2, and then enters the smelting furnace through the tube cavity of the inner tube 2, the tube cavity of the inner tube end tube 3 and the tube cavity of the outer tube end tube 4 in sequence; the combustion-supporting gas enters the smelting furnace through the combustion-supporting gas air supply channel 6 formed by the axial air supply channel 601, the inner tube end air supply channel 602 and the outer tube end air supply channel 603. When the demand for the delivery of combustion-supporting gas is the greatest, the inner tube 2 is rotated so that the multiple gas delivery channels 602 at the inner tube ends are fully aligned with the multiple gas delivery channels 603 at the outer tube ends. When the delivery of combustion-supporting gas needs to be reduced, the inner tube 2 is rotated so that the multiple gas delivery channels 602 at the inner tube ends are relatively staggered with the multiple gas delivery channels 603 at the outer tube ends, thereby reducing the overlapping area of ​​the two alignments, thereby reducing the cross-sectional area of ​​the combustion-supporting gas delivery channel 6, thereby achieving the effect of adjusting the delivery of combustion-supporting gas. When it is not necessary to deliver combustion-supporting gas, the inner tube 2 is rotated so that the multiple gas delivery channels 602 at the inner tube ends are fully aligned with the multiple gas delivery channels 603 at the outer tube ends. 602 is completely staggered with multiple outer tube end gas supply channels 603, that is, the multiple inner tube end gas supply channels 602 and the multiple outer tube end gas supply channels 603 are not connected to each other; thereby, the amount of combustion-supporting gas and the amount of fuel delivered by the smelting furnace spray gun can be conveniently adjusted, and the gas ejection speed can be guaranteed while reducing the combustion-supporting gas delivery amount, thereby avoiding blockage of the smelting furnace spray gun 1000 and ensuring the life of the smelting furnace spray gun 1000 and the smelting furnace. In addition, the combustion-supporting gas delivery channel 6 of the smelting furnace spray gun 1000 has a large adjustable range, which is conducive to the smooth progress of the process operation.

[0044] According to an embodiment of the first aspect of the present invention, the cross-sections of the inner tube end gas supply channel 602 and the outer tube end gas supply channel 603 are the same. Therefore, the multiple inner tube end gas supply channels 602 and the multiple outer tube end gas supply channels 603 can be completely aligned one by one, so that the combustion-supporting gas delivery channel 6 of the smelting furnace lance 1000 has a large adjustable range and is easy to control.

[0045] According to an embodiment of the first aspect of the present invention, the outer diameter of the outer tube end tube 4 is the same as the outer diameter of the outer tube 1 and the inner diameter of the outer tube end tube 4 is smaller than the inner diameter of the outer tube 1, thereby, the outer end tube 4 can be conveniently welded to the outer tube 1; the outer diameter of the inner tube end tube 3 is smaller than the inner diameter of the outer tube 1, so that the inner tube end tube 3 can rotate inside the outer tube 1; the inner diameter of the inner tube end tube 3 is the same as the inner diameter of the outer tube end tube 4, so that the chisel can conveniently and reliably block the fuel delivery channel 5; the inner diameter of the inner tube end tube 3 and the inner diameter of the outer tube end tube 4 are both smaller than the inner diameter of the inner tube 2, so that the fuel speed increases after passing through the inner diameter of the inner tube end tube 3 and the outer tube end tube 4.

[0046] According to an embodiment of the first aspect of the present invention, it also includes a combustion-supporting gas seat 7, in which a combustion-supporting gas inlet cavity 7011 is provided, and a first mounting hole and a second mounting hole which are connected to the combustion-supporting gas inlet cavity 7011 are provided on the combustion-supporting gas seat 7, and the first mounting hole and the second mounting hole are coaxially arranged and distributed on both sides of the combustion-supporting gas seat 7; the other end of the outer tube 1 is fixed in the first mounting hole, thereby, the combustion-supporting gas can enter the combustion-supporting gas delivery channel 6 through the combustion-supporting gas inlet cavity 7011; the other end of the inner tube 2 passes through the first mounting hole, the combustion-supporting gas inlet cavity 7011 and the second mounting hole and is rotatably supported in the second mounting hole, so that the combustion-supporting gas can be separated from the fuel.

[0047] According to a further embodiment of the first aspect of the present invention, the combustion-supporting gas seat 7 includes a combustion-supporting gas seat body 701 and a cover 702; a combustion-supporting gas inlet cavity 7011 is defined on the combustion-supporting gas seat body 701, and an opening communicating with the combustion-supporting gas inlet cavity 7011 is provided on the combustion-supporting gas seat body 701; the cover 702 is covered at the opening and is sealed and fixed to the combustion-supporting gas seat body 701, so that installation and maintenance can be facilitated.

[0048] According to a further embodiment of the first aspect of the present invention, the first mounting hole is arranged on the combustion-supporting gas holder body 701 and is opposite to the opening, and the second mounting hole is arranged on the cover 702. Thus, the installation of the inner tube 2 can be facilitated.

[0049] According to a further embodiment of the first aspect of the present invention, a rotating device 8 is installed in the second mounting hole, and the other end of the inner tube 2 is rotatably supported on the rotating device 8. In this way, the inner tube 2 can be rotated by rotating the other end of the inner tube 2, and can drive the inner tube end tube 3 to rotate synchronously.

[0050] According to some embodiments of the first aspect of the present invention, a combustion-supporting gas inlet pipe 9 is further included, one end of which is fixed on the combustion-supporting gas seat 7 and the lumen of the combustion-supporting gas inlet pipe 9 is connected to the combustion-supporting gas inlet cavity 7011. In this way, the combustion-supporting gas can enter the combustion-supporting gas inlet cavity 7011 through the combustion-supporting gas inlet pipe 9.

[0051] According to an embodiment of the first aspect of the present invention, it further includes a connector 11 and a head 10, wherein the connector 11 defines a first channel 1101 and a second channel 1102, wherein the other end of the inner tube 2 is installed in one end of the first channel 1101, one end of the second channel 1102 intersects and communicates with the first channel 1101, and the head 10 detachably blocks the other end of the first channel 1101. It can be understood that when it is necessary to transport fuel into the smelting furnace, the head 10 blocks the other end of the first channel 1101, and the fuel enters the connector 11 from the other end of the second channel 1102, and then enters the fuel delivery channel 5 and is transported into the smelting furnace through the fuel delivery channel 5. When the fuel is stopped from being transported into the smelting furnace, the head 10 is removed from the other end of the first channel 1101, and then the brazing rod is inserted into the first channel 1101 and the fuel delivery channel 5 from the other end of the first channel 1101, thereby the first channel 1101 and the fuel delivery channel 5 can be sealed, and the structure is simple and the operation is convenient.

[0052] The second aspect of the present invention also provides a smelting furnace.

[0053] The smelting furnace according to the embodiment of the second aspect of the present invention comprises the smelting furnace spray gun 1000 of any one of the first aspect of the present invention.

[0054] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0055] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A smelting furnace spray gun, characterized in that: include: External pipe; An outer tube end tube, wherein a plurality of outer tube end air supply channels are axially penetrated on the wall of the outer tube end tube, and the plurality of outer tube end air supply channels are spaced apart in the circumferential direction; the outer tube end tube is coaxially arranged with the outer tube, and the outer ring portion of one end of the outer tube end tube is welded and fixed to one end of the outer tube; the plurality of outer tube end air supply channels are located in the tube cavity of the outer tube on the radial projection plane; An inner tube, the inner tube is rotatably arranged coaxially inside the outer tube, and an axial air supply passage with a ring-shaped cross section is formed between the outer circumference of the inner tube and the inner circumference of the outer tube; The inner tube end tube is coaxially arranged in the outer tube, and the wall of the inner tube end tube is provided with a plurality of inner tube end air supply channels axially penetrating therethrough, and the plurality of inner tube end air supply channels are distributed at intervals in the circumferential direction; the inner tube end tube is coaxially arranged with the inner tube and one end of the inner tube end tube is welded and fixed to one end of the inner tube, so that the inner tube end tube and the inner tube can rotate synchronously, and the plurality of inner tube end air supply channels are connected with the axial air supply channel; the other end of the inner tube end tube is pressed against the inner ring portion of one end of the outer tube end tube, so that the tube cavity of the inner tube, the tube cavity of the inner tube end tube and the tube cavity of the outer tube end tube are connected in sequence to form a fuel delivery channel, and at the same time, the axial air supply channel, the inner tube end air supply channel and the outer tube end air supply channel are connected to form a combustion-supporting gas delivery channel; the inner tube rotates to adjust the alignment degree between the inner tube end air supply channel and the outer tube end air supply channel; The outer diameter of the outer tube end tube is the same as the outer diameter of the outer tube and the inner diameter of the outer tube end tube is smaller than the inner diameter of the outer tube, the outer diameter of the inner tube end tube is smaller than the inner diameter of the outer tube, the inner diameter of the inner tube end tube is the same as the inner diameter of the outer tube end tube, and the inner diameter of the inner tube end tube and the inner diameter of the outer tube end tube are both smaller than the inner diameter of the inner tube.

2. The smelting furnace spray gun according to claim 1, characterized in that: The cross-sections of the air delivery channel at the end of the inner tube and the air delivery channel at the end of the outer tube are the same.

3. The smelting furnace spray gun according to claim 1, characterized in that: It also includes a combustion-supporting gas seat, which has a combustion-supporting gas inlet cavity therein, and is provided with a first mounting hole and a second mounting hole which are connected to the combustion-supporting gas inlet cavity, the first mounting hole and the second mounting hole being coaxially arranged and distributed on both sides of the combustion-supporting gas seat; the other end of the outer tube is fixed in the first mounting hole; the other end of the inner tube passes through the first mounting hole, the combustion-supporting gas inlet cavity and the second mounting hole and is rotatably supported in the second mounting hole.

4. The smelting furnace spray gun according to claim 3, characterized in that: The combustion-supporting gas seat comprises a combustion-supporting gas seat body and a sealing cover; the combustion-supporting gas seat body defines the combustion-supporting gas inlet cavity, and the combustion-supporting gas seat body is provided with an opening communicating with the combustion-supporting gas inlet cavity; the sealing cover is arranged at the opening and is sealed and fixed to the combustion-supporting gas seat body.

5. The smelting furnace spray gun according to claim 4, characterized in that: The first mounting hole is arranged on the combustion-supporting gas seat body and is opposite to the opening, and the second mounting hole is arranged on the sealing cover.

6. The smelting furnace spray gun according to claim 5, characterized in that: A rotating device is installed in the second mounting hole, and the other end of the inner tube is rotatably supported on the rotating device.

7. The smelting furnace spray gun according to any one of claims 3 to 6, characterized in that: It also includes a combustion-supporting gas inlet pipe, one end of which is fixed on the combustion-supporting gas seat and the lumen of the combustion-supporting gas inlet pipe is connected to the combustion-supporting gas inlet cavity.

8. The smelting furnace spray gun according to claim 1, characterized in that: It also includes a connecting piece and a sealing head, wherein the connecting piece defines a first channel and a second channel, wherein the other end of the inner tube is installed in one end of the first channel, one end of the second channel intersects and communicates with the first channel, and the sealing head is detachably sealed at the other end of the first channel.

9. A smelting furnace, characterized in that: The invention comprises a smelting furnace spray gun as claimed in any one of claims 1 to 8.

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