CN118272592A - Blast furnace tuyere spray gun, manufacturing method thereof and blast furnace tuyere spraying device - Google Patents

Abstract

The application discloses a blast furnace tuyere spray gun and a manufacturing method thereof, and a blast furnace tuyere spray device, which relate to the technical field of metallurgy, wherein the blast furnace tuyere spray gun comprises: the first injection pipe is provided with a first opening and closing valve, the first injection pipe is connected with a first bypass branch, and the joint of the first bypass branch and the first injection pipe is positioned at the downstream of the first opening and closing valve; the second blowing pipe is provided with a second opening and closing valve, a second bypass branch is connected to the second blowing pipe, and the joint of the second bypass branch and the second blowing pipe is positioned at the downstream of the second opening and closing valve; the spray head is provided with an outer pipe and an inner pipe, the outer pipe is connected with the outlet of the first spraying pipe, and the inner pipe is communicated with the outlet of the second spraying pipe; etc. The application can be suitable for the multi-phase medium composite blowing of the blast furnace tuyere, and can realize the multi-phase fuel medium composite blowing operation of gas, gas-liquid, gas-solid and the like while the tuyere is blown with oxygen-enriched high-temperature gas.

Description

Blast furnace tuyere spray gun, manufacturing method thereof and blast furnace tuyere spraying device

Technical Field

The invention relates to the technical field of metallurgy, in particular to a blast furnace tuyere spray gun, a manufacturing method thereof and a blast furnace tuyere spray device.

Background

The tuyere of an iron-making blast furnace generally blows oxygen-enriched high-temperature gas into the blast furnace from the tuyere through an air supply device, and the high-temperature hot air reacts with fuel (coke and coal dust) in the furnace to generate CO, so that the CO reduces iron oxide in the iron ore to generate iron. In order to promote the reduction reaction of fuel (coke and coal dust) and iron ore, when oxygen-enriched high-temperature gas is injected into the tuyere, gaseous, solid and liquid fuel is injected at the same time, so that the smelting effect is improved.

In the prior art, an air supply hole is formed in the end face of the air port small sleeve, but if more medium is required to be sprayed, the safety of the structural design of the air port small sleeve is limited, and the technical difficulty is high. For example, in an air port blowing device, the front end of a belly pipe is closely attached to the rear end of an air port small sleeve, the rear end of a spray gun is adjustably inserted and installed in the belly pipe, and the front end of the spray gun extends out of the inner cavity of the belly pipe and into the inner cavity of the air port small sleeve. If a plurality of belly pipes are arranged in the circumferential direction of the belly pipes, the processing and manufacturing procedures are increased, and after the multiphase fuel medium at the outlet of the spray gun is sprayed into the furnace, the multiphase fuel medium diverges along the main air flow and flows, so that the mixed combustion effect is poor; the spray gun is also installed in the belly pipe in a penetrating way, and the installation angle is adjusted according to the angle of the tuyere small sleeve, so that the angle adjustment range is limited, and the blowing medium is single.

In order to better play the roles of supporting combustion, saving fuel consumption and reducing the carbon dioxide emission of the blast furnace, more mediums need to be blown, so that a blowing device which is suitable for the multi-phase medium composite blowing of the blast furnace tuyere and has safe and reliable structure needs to be configured.

Disclosure of Invention

In order to overcome the defects in the prior art, the technical problem to be solved by the embodiment of the invention is to provide a blast furnace tuyere spray gun, a manufacturing method thereof and a blast furnace tuyere spray device, which can be suitable for multi-phase medium composite spray of the blast furnace tuyere, and realize multi-phase fuel medium composite spray operation such as gas-gas, gas-liquid, gas-solid and the like while oxygen-enriched high-temperature gas is sprayed at the tuyere.

The specific technical scheme of the embodiment of the invention is as follows:

A blast furnace tuyere lance, the blast furnace tuyere lance comprising:

the first blowing pipe is provided with a first opening and closing valve, a first bypass branch is connected to the first blowing pipe, and the joint of the first bypass branch and the first blowing pipe is positioned at the downstream of the first opening and closing valve;

the second blowing pipe is provided with a second opening and closing valve, a second bypass branch is connected to the second blowing pipe, and the joint of the second bypass branch and the second blowing pipe is positioned at the downstream of the second opening and closing valve;

A nozzle having an outer tube connected to the outlet of the first lance and an inner tube in communication with the outlet of the second lance;

The section of the second blowing pipe close to the self outlet is inserted into the section of the first blowing pipe close to the self outlet, and a gap is formed between the outer side wall of the second blowing pipe inserted into the first blowing pipe and the inner side wall of the first blowing pipe.

Preferably, the first bypass branch is used for connecting a purging and cooling air source; the second bypass branch is used for connecting a purging and cooling air source.

Preferably, the inlet of the first injection pipe is used for inputting fuel medium; the inlet of the second injection pipe is used for inputting fuel medium.

Preferably, the second blowing pipe inserted in the first blowing pipe is coaxially disposed with a portion corresponding to the first blowing pipe.

Preferably, the outer tube is arranged coaxially with the inner tube; the axis of the outer tube and the axis of a section of the first blowing tube close to the outlet of the first blowing tube are provided with a preset included angle smaller than 180 degrees.

Preferably, the first bypass branch is connected to the first blowing pipe through a first three-way joint, the first three-way joint is provided with a first port and a second port which are located in opposite directions, and a third port which is located at a side, the third port is connected to the first bypass branch, and the first port and the second port are connected to the first blowing pipe.

Preferably, the second bypass branch is connected to the second blowing pipe through a second three-way joint, the second three-way joint is provided with a fourth port and a fifth port which are located in opposite directions, and a sixth port which is located at a side, the sixth port is connected to the second bypass branch, and the fourth port and the fifth port are connected to the second blowing pipe.

Preferably, the blast furnace tuyere spray gun further comprises: a second flange through which the first blowing pipe into which the second blowing pipe is inserted; the first fixing piece is fixedly connected to the second flange; the second fixing piece is provided with a first mounting hole and a second mounting hole, a section of the second blowing pipe close to the self inlet is bent relatively close to the self outlet, a section of the first blowing pipe close to the self inlet is bent relatively close to the self outlet, a section of the second blowing pipe close to the self inlet is inserted and fixed in the second mounting hole, a section of the first blowing pipe close to the self inlet is inserted and fixed in the first mounting hole, and fixed connection is realized between the second fixing piece and the first fixing piece in a detachable mode.

Preferably, a positioning piece for fixing the inner pipe is connected between the outer side wall of the inner pipe and the inner side wall of the outer pipe of the spray head, and the positioning piece is provided with an output hole; the outer pipe is welded with the outlet of the first jetting pipe, and the outlet of the second jetting pipe is welded with or abutted against the inner pipe so as to fix the second jetting pipe.

A blast furnace tuyere injection device, comprising:

a tuyere small sleeve with a first runner; the air supply device is connected with the air port small sleeve and provided with a second flow passage, the second flow passage is communicated with the first flow passage, and a sleeve communicated with the second flow passage is arranged in the side wall of the air supply device; the blast furnace tuyere spray gun according to any one of the above, wherein the blast furnace tuyere spray gun can be inserted into the sleeve, a section of the first injection pipe, which is close to the outlet of the first injection pipe and is inserted with the second injection pipe, extends into the first flow passage through the sleeve and the second flow passage, and the inner pipe and the outer pipe are coaxially arranged.

Preferably, the inlet of the sleeve is connected with a first flange; the blast furnace tuyere injection device includes: the bracket mechanism comprises a second flange which is matched and connected with the first flange; the first fixing piece is fixedly connected to the second flange and provided with a first adjusting groove extending along the axial direction of the sleeve; one end of the connecting pipe is connected to the second flange; the first quick-change connector is connected to the other end of the connecting pipe;

The blast furnace tuyere spray gun comprises a second fixing piece and a second quick-change connector; the second fixing piece is provided with a first mounting hole and a second mounting hole, a section of the second blowing pipe close to the self inlet is bent relatively to a section of the second blowing pipe close to the self outlet, a section of the first blowing pipe close to the self inlet is bent relatively to a section of the second blowing pipe close to the self outlet, a section of the second blowing pipe close to the self inlet is inserted and fixed in the second mounting hole, a section of the first blowing pipe close to the self inlet is inserted and fixed in the first mounting hole, and the second fixing piece is provided with a second adjusting groove extending along the axial direction of the sleeve; the position of the first adjusting groove relative to the second adjusting groove can be adjusted in the axial direction of the sleeve, and the first fixing piece and the second fixing piece are fixedly connected through bolts and nuts inserted into the first adjusting groove and the second adjusting groove; the first injection pipe with the second injection pipe inserted is sleeved with the second quick-change connector, the first injection pipe with the second injection pipe inserted can be inserted into the first quick-change connector, the connecting pipe, the second flange, the sleeve and the second flow passage extend into the first flow passage, and the second quick-change connector is connected with the first quick-change connector in a matched mode.

Preferably, the bracket mechanism further comprises a support base, the support base is provided with an upper end face, the upper end face is parallel to the axis of the sleeve, the support base is connected to the air supply device, and the lower end of the first quick-change connector is arranged on the upper end face of the support base.

A method of manufacturing a blast furnace tuyere lance according to any of the preceding claims, the method comprising:

Forming a notch on the side wall of a first blowing pipe, inserting a second blowing pipe into the first blowing pipe from the notch, and adjusting the outlet of the first blowing pipe to be positioned at the same position as the outlet of the second blowing pipe;

Bending a part of the first blowing pipe, which is not inserted with the second blowing pipe, bending a part of the second blowing pipe, which is not inserted with the first blowing pipe, wherein the bending direction of the first blowing pipe is the same as and parallel to the bending direction of the second blowing pipe, and then plugging the notch;

According to the first distance between the first blowing pipe and the second blowing pipe after bending, a first mounting hole and a second mounting hole which are spaced at the first distance are formed in a second fixing piece, and a second adjusting groove is formed in the second fixing piece;

Inserting and fixing a bent section of the second injection pipe in the second mounting hole, and inserting and fixing a section of the first injection pipe close to the inlet of the first injection pipe in the first mounting hole;

The inlet of the first blowing pipe is connected with a first bypass branch through a first three-way joint, the first three-way joint is provided with a first port and a second port which are positioned in opposite directions and a third port positioned at the side, the third port is connected with the first bypass branch, and the first port and the second port are respectively connected with the first blowing pipe and a first valve;

The inlet of the second blowing pipe is connected with the second bypass branch through a second three-way joint, the second three-way joint is provided with a fourth port and a fifth port which are positioned in opposite directions and a sixth port positioned at the side, the sixth port is connected with the second bypass branch, and the fourth port and the fifth port are respectively connected with the second blowing pipe and a second valve;

And connecting an outer pipe of the spray head at the outlet of the second spraying pipe, and enabling the inner pipe to be communicated with the outlet of the second spraying pipe.

Preferably, the tuyere small sleeve is connected to the furnace body, the tuyere small sleeve is provided with a first flow passage, the air supply device is connected with the tuyere small sleeve, the air supply device is provided with a second flow passage, a sleeve communicated with the second flow passage is arranged in the side wall of the air supply device, and a first flange is connected to the inlet of the sleeve;

The manufacturing method further comprises the steps of:

connecting one end of a connecting pipe to a second flange, connecting the other end of the connecting pipe to a first quick-change connector, fixedly connecting a first fixing piece with a first adjusting groove to the second flange, and arranging a supporting base for supporting the first quick-change connector between the first quick-change connector and the air supply device;

a second quick-change connector is sleeved outside the first injection pipe inserted with the second injection pipe, then the first injection pipe inserted with the second injection pipe is inserted into the first quick-change connector, the connecting pipe, the second flange, the sleeve and the second flow passage extend into the first flow passage, and the second quick-change connector is connected with the first quick-change connector in a matched manner;

After the second quick-change connector is connected with the first quick-change connector in a matched mode, a first adjusting groove and a second adjusting groove are inserted between the first fixing piece and the second fixing piece to achieve fixed connection, and the first adjusting groove and the second adjusting groove extend along the axial direction of the sleeve.

The technical scheme of the invention has the following remarkable beneficial effects:

1. By utilizing the blast furnace tuyere spray gun structure, different kinds of combustion media can be respectively input into the first injection pipe and the second injection pipe while oxygen-enriched high-temperature gas is injected into the tuyere, and finally the combustion media are injected into the furnace from the inner pipe and the outer pipe of the nozzle. When the blast furnace is winded, the first injection pipe and the second injection pipe stop introducing fuel medium, and at the moment, a cooling air source such as compressed air is introduced into the bypass branch for blowing and cooling the injection pipes. Different kinds of combustion media can be gas-gas, gas-liquid and gas-solid combination, so that the multi-phase fuel medium composite injection operation is realized, the reduction reaction of coke and iron ore is promoted, the combustion supporting, the carbon emission reducing and the fuel consumption saving effects are better realized, the smelting effect is improved, and the production cost is reduced.

2. According to the blast furnace tuyere spray gun, the nozzle in the blast furnace tuyere spray gun adopts the mode that the inner pipe and the outer pipe are sleeved, the first spray pipe and the second spray pipe also adopt the mode that the inner pipe and the outer pipe are sleeved, when different fuel mediums are sprayed out of the inner pipe and the outer pipe respectively, the fuel mediums sprayed out of the outlet of the first spray pipe can be positioned in the circumferential direction of the fuel mediums sprayed out of the outlet of the second spray pipe, so that the fuel mediums sprayed out of the outlet of the first spray pipe and the fuel mediums sprayed out of the outlet of the second spray pipe are mixed to a certain extent, and then the mixed fuel mediums flow into the furnace, so that the fuel mediums can be combusted fully, and the energy saving and emission reduction effects are improved.

3. The blast furnace tuyere spray gun occupies small space, and can be directly matched with a tuyere small sleeve of a blast furnace for use, so that different mixed fuel media are conveyed into the furnace during spraying, and the safety of the tuyere small sleeve is not affected.

Specific embodiments of the invention are disclosed in detail below with reference to the following description and drawings, indicating the manner in which the principles of the invention may be employed. It should be understood that the embodiments of the invention are not limited in scope thereby. Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments in combination with or instead of the features of the other embodiments.

Drawings

The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, proportional sizes, and the like of the respective components in the drawings are merely illustrative for aiding in understanding the present invention, and are not particularly limited. Those skilled in the art with access to the teachings of the present invention can select a variety of possible shapes and scale sizes to practice the present invention as the case may be.

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

FIG. 2 is a schematic view showing the structure of the nozzle, the first blowing pipe and the second blowing pipe according to the embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of a showerhead according to an embodiment of the present invention;

FIG. 4 is a side view of a spray head according to an embodiment of the present invention;

FIG. 5 is a front view of a first fixture with a second flange coupled thereto in accordance with an embodiment of the present invention;

FIG. 6 is a top view of a first fixture with a second flange coupled thereto in accordance with an embodiment of the present invention;

FIG. 7 is a schematic view of a structure in which a sleeve with a first flange attached thereto is installed in an air supply device according to an embodiment of the present invention;

FIG. 8 is a schematic view of a tuyere injection device of a blast furnace according to an embodiment of the present invention;

Fig. 9 is a schematic structural diagram of a mating connection between a first quick-change connector and a second quick-change connector according to an embodiment of the present invention.

Reference numerals of the above drawings:

1. A first blowing pipe; 2. a first opening/closing valve; 3. a first three-way joint; 4. a second blowing pipe; 5. a second opening/closing valve; 6. a second three-way joint; 7. a spray head; 71. an outer tube; 72. an inner tube; 73. a positioning piece; 731. an output aperture; 8. a second flange; 9. a first fixing member; 91. a first adjustment tank; 10. a second fixing member; 101. a first mounting hole; 102. a second mounting hole; 11. a tuyere small sleeve; 111. a first flow passage; 12. an air supply device; 121. a second flow passage; 122. a sleeve; 123. a first flange; 124. rib plates; 13. a first quick-change connector; 14. a second quick-change connector; 15. a bolt; 16. a support base; 17. a connecting pipe; 100. a blast furnace tuyere spray gun.

Detailed Description

The details of the invention will be more clearly understood in conjunction with the accompanying drawings and description of specific embodiments of the invention. The specific embodiments of the invention described herein are for purposes of illustration only and are not to be construed as limiting the invention in any way. Given the teachings of the present invention, one of ordinary skill in the related art will contemplate any possible modification based on the present invention, and such should be considered to be within the scope of the present invention. It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "mounted," "connected," "coupled," and "connected" are to be construed broadly, and may be, for example, mechanically or electrically connected, may be in communication with each other in two elements, may be directly connected, or may be indirectly connected through an intermediary, and the specific meaning of the terms may be understood by those of ordinary skill in the art in view of the specific circumstances. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

In order to be suitable for the multi-phase medium composite blowing of the blast furnace tuyere, and realize the multi-phase fuel medium composite blowing operation of gas, gas-liquid, gas-solid and the like while blowing oxygen-enriched high-temperature gas at the tuyere, the application provides a blast furnace tuyere spray gun, and fig. 1 is a schematic structural diagram of the blast furnace tuyere spray gun in the embodiment of the application, as shown in fig. 1, the blast furnace tuyere spray gun comprises: the first injection pipe 1, the first valve 2, the first bypass branch, the second injection pipe 4, the second valve 5, the second bypass branch and the nozzle 7.

As shown in fig. 1, a first on-off valve 2 may be disposed on the first blowing pipe 1, and a first bypass branch is connected to the first blowing pipe 1, where a connection between the first bypass branch and the first blowing pipe 1 is located downstream of the first on-off valve 2. The first valve 2 can control the on-off state of the first injection pipe 1 and also can control the communication degree of the first injection pipe 1, so that the flow rate of the fuel medium input into the first injection pipe 1 can be controlled. . For example, the first opening/closing valve 2 may be a valve capable of adjusting the opening degree. The first bypass branch is used for connecting a purging and cooling air source, for example, a compressed air purging, a nitrogen purging and cooling pipeline air source, and is connected with the cooling air source through a cooling pipeline. The fuel medium may be a gaseous fuel, a solid fuel, a liquid fuel. When the fuel medium is solid, the fuel medium can be purged to the shower head 7 to be sprayed out through the first bypass branch to which purge gas is input.

In order to facilitate the connection of the first bypass branch to the first lance 1 during processing, the first lance 1 may be connected to the first bypass branch via the first three-way connection 3. As a practical matter, the first three-way joint 3 has a first port and a second port located in opposite directions, and a third port located laterally, the third port being connected to the first bypass branch, the first port and the second port being connected to the first lance 1. The first three-way connection 3 can be connected with the first blowing pipe 1 and the first bypass branch through threaded connection.

As shown in fig. 1, a second opening and closing valve 5 is provided on the second blowing pipe 4, a second bypass branch is connected to the second blowing pipe 4, and the junction of the second bypass branch and the second blowing pipe 4 is located downstream of the second opening and closing valve 5. The second opening and closing valve 5 can control the on-off of the second injection pipe 4, so that it is possible to control whether the fuel medium is input into the second injection pipe 4. The second bypass branch is used for connecting a purging and cooling air source, for example, compressed air purging, nitrogen purging and connecting the cooling air source through a cooling pipeline. Likewise, the fuel medium may be a gaseous fuel, a solid fuel, a liquid fuel. When the fuel medium is solid, the purge gas can be input through the second bypass branch to purge the fuel medium to the nozzle 7 for ejection.

In order to facilitate the connection of the second bypass branch to the second lance 4 during processing, the second lance 4 may be connected to the second bypass branch via a second three-way connection 6. As a practical matter, the second bypass branch is connected to the second blowing pipe 4 through a second three-way joint 6, the second three-way joint 6 has a fourth port and a fifth port located in opposite directions, and a sixth port located at a side, the sixth port is connected to the second bypass branch, and the fourth port and the fifth port are connected to the second blowing pipe 4. The second three-way joint 6 can be connected with the second blowing pipe 4 and the second bypass branch through threaded connection.

As shown in fig. 1, the inner diameter of the first lance 1 is larger than the outer diameter of the second lance 4, so that a section of the second lance 4 near the outlet thereof is inserted into a section of the first lance 1 near the outlet thereof, and a gap is provided between the outer sidewall of the second lance 4 inserted into the first lance 1 and the inner sidewall of the first lance 1, thereby ensuring that the fuel medium and the purge gas introduced into the first lance 1 can be injected from the outlet of the first lance 1.

Fig. 2 is a schematic structural diagram of the nozzle, the first blowing pipe 1 and the second blowing pipe 4 according to the embodiment of the present invention, and as shown in fig. 1 and 2, the nozzle 7 may have an outer pipe 71 and an inner pipe 72, where the outer pipe 71 is sleeved outside the inner pipe 72. The outer tube 71 is connected to the outlet of the first lance 1 and the inner tube 72 is connected to the outlet of the second lance 4. The outer tube 71 is welded to the outlet of the first lance 1 and the inner tube 72 is in abutment or connection with the outlet of the second lance 4 for communication.

As a possible way, fig. 3 is a schematic cross-sectional structure of the nozzle in the embodiment of the present invention, and fig. 4 is a side view of the nozzle in the embodiment of the present invention, as shown in fig. 3 and 4, a portion of the second nozzle 4 inserted into the first nozzle 1 corresponding to the first nozzle 1 is coaxially disposed as much as possible, so as to ensure that the fuel medium and the purge gas input into the first nozzle 1 can be smoothly blown out from the outlet of the first nozzle 1, and avoid occurrence in the first nozzle 1. In addition, the outer tube 71 and the inner tube 72 of the nozzle 7 are also coaxially arranged as much as possible, so that the fuel medium injected from the outlet of the first injection pipe 1 can be uniformly located in the circumferential direction of the fuel medium injected from the outlet of the second injection pipe 4, and the fuel medium injected from the outlet of the first injection pipe 1 and the fuel medium injected from the outlet of the second injection pipe 4 can be uniformly mixed.

Since the second blowing pipe 4 inserted into the first blowing pipe 1 has a long length, and may be inclined, bent, deformed, or fluctuated to some extent due to the influence of its own weight, high temperature radiation, and air pressure, in order to ensure that the portion of the second blowing pipe 4 inserted into the first blowing pipe 1 corresponding to the first blowing pipe 1 is disposed coaxially as much as possible, a positioning member 73 for fixing the inner pipe 72 is connected between the outer side wall of the inner pipe 72 of the shower head 7 and the inner side wall of the outer pipe 71, and the positioning member 73 has an output hole 731. As shown in fig. 4, the output holes 731 may be plural, and may be circumferentially distributed around the axis of the first lance 1. The positioning member 73 may be in a ring shape, and an outer side wall of the positioning member 73 abuts against an inner side wall of the outer tube 71, and an inner side wall of the positioning member 73 abuts against an outer side wall of the inner tube 72. The outer tube 71 may be welded to the outlet of the first blowing pipe 1, and the outlet of the second blowing pipe 4 may be welded to or abutted against the inner tube 72, so as to fix the position of the second blowing pipe 4.

The dimensions of the inner tube 72 and the outer tube 71 of the nozzle 7 are determined after calculation according to the pressure and the flow rate of the fuel medium corresponding to each other, and the pressure of the medium sprayed from the inner tube 72 and the outer tube 71 is ensured to be basically the same, so that the instant efficient mixing effect when the fuel medium is sprayed and blown is improved. As shown in fig. 3, the outlets of the inner tube 72 and the outer tube 71 of the spray head 7 are a section of special-shaped pipeline, and one end of the outlet is an oval section, namely, the outlet ends of the inner tube 72 and the outer tube 71 are cut into inclined planes. The axis of the outer tube 71 and the axis of a section of the first lance 1 near its outlet have a predetermined angle of less than 180 degrees.

In order to fix the first lance 1 and the second lance 4 near the side of the inlet thereof, and prevent the first lance 1 and the second lance 4 from being bent obliquely, fig. 5 is a front view of the first fixing member to which the second flange is connected and the second fixing member in the embodiment of the present invention, and fig. 5 and 6 are front views of the first fixing member to which the second flange is connected and the second fixing member in the embodiment of the present invention, and fig. 6 is a top view of the blast furnace tuyere lance to which the first fixing member to which the second flange is connected and the second fixing member in the embodiment of the present invention, the blast furnace tuyere lance may include: a second flange 8 through which the first blowing pipe 1 having the second blowing pipe 4 inserted therein is inserted through the second flange 8; a first fixing member 9 fixedly connected to the second flange 8; the second fixing piece 10, the first mounting hole 101 and the second mounting hole 102 are arranged on the second fixing piece 10, a section of the second blowing pipe 4 close to the self inlet is bent relatively to a section of the second blowing pipe 4 close to the self outlet, a section of the first blowing pipe 1 close to the self inlet is bent relatively to a section of the second blowing pipe 4 close to the self outlet, a section of the second blowing pipe 4 close to the self inlet is inserted and fixed in the second mounting hole 102, a section of the first blowing pipe 1 close to the self inlet is inserted and fixed in the first mounting hole 101, and fixed connection is realized between the second fixing piece 10 and the first fixing piece 9 in a detachable mode. In order to improve the strength and the accuracy of the fixation, a section of the second blowing pipe 4 near the inlet thereof is inserted and fixed in the second mounting hole 102 by welding, and in the same manner, a section of the first blowing pipe 1 near the inlet thereof is inserted and fixed in the first mounting hole 101 by welding. For example, the first fixing member 9 may have a first adjustment groove 91 extending in the axial direction of the sleeve 122 thereon, and the second fixing member 10 may have a second adjustment groove extending in the axial direction of the sleeve 122 thereon, and the first and second fixing members 9 and 10 may be detachably fixed by being engaged with nuts by bolts 15 provided in the first and second adjustment grooves 91 and 10.

In the present application, a blast furnace tuyere injection device is also provided, fig. 7 is a schematic structural diagram of a sleeve with a first flange connected to the sleeve installed in an air supply device in the embodiment of the present application, and fig. 8 is a schematic structural diagram of a blast furnace tuyere injection device in the embodiment of the present application, as shown in fig. 7 and 8, the blast furnace tuyere injection device may include: a tuyere small sleeve 11 having a first flow path 111; an air supply device 12 connected with the tuyere small sleeve 11 and provided with a second flow passage 121, wherein the second flow passage 121 is communicated with the first flow passage 111, and a sleeve 122 communicated with the second flow passage 121 is arranged in the side wall of the air supply device 12; the blast furnace tuyere lance 100 according to any one of the above embodiments, the blast furnace tuyere lance 100 is capable of being inserted into the sleeve 122, and a section of the first lance 1 into which the second lance 4 is inserted near the outlet thereof is inserted into the first flow passage 111 through the sleeve 122 and the second flow passage 121, and the inner tube 72 is disposed coaxially with the outer tube 71. The tuyere small sleeve 11 is provided on the furnace body, and the first flow passage 111 can communicate with the inside of the furnace. The blower 12 blows air into the furnace through the second flow path 121 and the first flow path 111.

As shown in fig. 7, the outer side wall of the sleeve 122 may be connected to the housing of the blower 12 by a plurality of ribs 124. In the above manner, the tuyere lance 100 can be mounted in the sleeve 122 of the blower 12 of the tuyere injection device, and the nozzle 7 can be inserted into the first flow passage 111 of the tuyere small sleeve 11, thereby delivering the fuel medium into the furnace. Meanwhile, the blast furnace tuyere spray gun 100 in the above-described structure occupies a small space, can mix 2 kinds of fuel media, and can directly transport the fuel media, which have been mixed to some extent at the time of being output from the shower head 7, into the furnace by using the tuyere small sleeve 11 of the blast furnace.

As shown in fig. 8, the axis of the first blowing pipe 1 and the axis of the second blowing pipe 4, the axis of the inner pipe 72 and the outer pipe 71 of the nozzle 7, the axis of the tuyere small sleeve 11, and the axis of the air blowing device 12 may be in the same plane. The preset included angle b between the axis of the outer tube 71 and the axis of the section of the first blowing tube 1 near the outlet thereof can be adjusted according to the size specification and the installation angle of the tuyere small sleeve 11, so that the axes of the inner tube 72 and the outer tube 71 of the nozzle 7 are in the same straight line with the axis of the tuyere small sleeve 11. In this way, the mixed fuel medium after being sprayed and blown out from the inner pipe 72 and the outer pipe 71 of the nozzle 7 flows along the axial direction of the tuyere small sleeve 11 as much as possible, and the side wall of the first flow channel 111 of the tuyere small sleeve 11 is prevented from being eroded and worn by the airflow of the sprayed fuel by changing the flow direction of the fuel medium sprayed from the outlets of the inner pipe 72 and the outer pipe 71 of the nozzle 7, so that the cost can be reduced and the economic benefit can be improved.

To facilitate the insertion and extraction of the tuyere lance 100 in the sleeve 122 for quick replacement, a first flange 123 is connected to the inlet of the sleeve 122. Fig. 9 is a schematic structural diagram of a mating connection portion of a first quick-change connector and a second quick-change connector according to an embodiment of the present invention, and as shown in fig. 8 and 9, the blast furnace tuyere injection device may include: the bracket mechanism comprises a second flange 8, and the second flange 8 is matched and connected with the first flange 123; a first fixing member 9 fixedly coupled to the second flange 8, the first fixing member 9 having a first adjustment groove 91 extending in an axial direction of the sleeve 122; a connection pipe 17 having one end connected to the second flange 8; a first quick-change coupler 13 connected to the other end of the connection pipe 17. The tuyere lance 100 comprises a second fixing member 10 and a second quick change coupling 14. The first fixing member 9 and the second fixing member 10 are fixedly connected by bolts 15 and nuts inserted into the first adjusting grooves 91 and the second adjusting grooves. The first blowing pipe 1 inserted with the second blowing pipe 4 is sleeved with the second quick-change connector 14, the first blowing pipe 1 inserted with the second blowing pipe 4 can be inserted into the first quick-change connector 13, the connecting pipe 17, the second flange 8, the sleeve 122 and the second flow passage 121 to extend into the first flow passage 111, and the second quick-change connector 14 is connected with the first quick-change connector 13 in a matched mode. When the blast furnace tuyere spray gun 100 needs to be replaced, the second quick-change connector 14 is unscrewed and separated from the first quick-change connector 13, the first fixing piece 9 and the second fixing piece 10 are unscrewed through the bolts 15 and nuts inserted into the first adjusting groove 91 and the second adjusting groove so that the first fixing piece 9 and the second fixing piece 10 can be separated, and then the first blowing pipe 1 with the second blowing pipe 4 inserted therein can be pulled out from the first quick-change connector 13, the connecting pipe 17, the second flange 8, the sleeve 122 and the like.

In the above configuration, the depth of the blast furnace tuyere lance 100 inserted into the sleeve 122 and the first flow passage 111 of the tuyere small sleeve 11 can be adjusted by adjusting the relative position between the first adjustment groove 91 and the second adjustment groove. When the second quick-change connector 14 is connected with the first quick-change connector 13 in a matched manner, the quick-change of the blast-furnace tuyere spray gun 100 in the sleeve 122 can be realized, and the tightness between the first injection pipe 1 and the sleeve 122 after the blast-furnace tuyere spray gun 100 is inserted into the sleeve 122 can be ensured.

As a possible way, as shown in fig. 8 and 9, the bracket mechanism may include a support base 16 having an upper end surface parallel to the axis of the sleeve 122, the support base 16 being connected to the air supply device 12, and the lower end of the first quick-change connector 13 being disposed on the upper end surface of the support base 16. So can make the position of first quick change joint 13 more stable, insert in sleeve pipe 122 when blast furnace tuyere spray gun 100, after the second quick change joint 14 of blast furnace tuyere spray gun 100 is sealed with first quick change joint 13 connection to guarantee the coaxial installation between the first injection pipe 1 of blast furnace tuyere spray gun 100 again second injection pipe 4 and sleeve pipe 122.

The application also provides a manufacturing method of the blast furnace tuyere spray gun, which can comprise the following steps:

A notch is formed in the side wall of the first blowing pipe 1, the second blowing pipe 4 is inserted into the first blowing pipe 1 from the notch, and the outlet of the first blowing pipe 1 and the outlet of the second blowing pipe 4 are adjusted to be positioned at the same position.

Bending a part of the first blowing pipe 1, into which the second blowing pipe 4 is not inserted, bending a part of the second blowing pipe 4, into which the first blowing pipe 1 is not inserted, wherein the bending direction of the first blowing pipe 1 is the same as and parallel to the bending direction of the second blowing pipe 4, and then plugging the notch.

According to the first distance between the bent first blowing pipe 1 and the second blowing pipe 4, a first mounting hole 101 and a second mounting hole 102 which are spaced at a first distance are formed in the second fixing piece 10, and a second adjusting groove is formed in the second fixing piece 10.

The bent section of the second blowing pipe 4 is inserted and fixed into the second mounting hole 102, and the section of the first blowing pipe 1 near the inlet thereof is inserted and fixed into the first mounting hole 101.

The inlet of the first blowing pipe 1 is connected with a first bypass branch through a first three-way joint 3, the first three-way joint 3 is provided with a first port and a second port which are positioned in opposite directions and a third port positioned at the side, the third port is connected with the first bypass branch, and the first port and the second port are respectively connected with the first blowing pipe 1 and the first valve 2.

The inlet of the second blowing pipe 4 is connected with a second bypass branch through a second three-way joint 6, the second three-way joint 6 is provided with a fourth port and a fifth port which are positioned in opposite directions and a sixth port positioned at the side, the sixth port is connected with the second bypass branch, and the fourth port and the fifth port are respectively connected with the second blowing pipe 4 and a second valve 5.

The outer tube 71 of the nozzle 7 is connected to the outlet of the second lance 4 and the inner tube 72 is brought into communication with the outlet of the second lance 4.

The blast furnace tuyere spray gun can be processed by the manufacturing method, the whole manufacturing method is simple and convenient, complex part processing is not needed, the installation connection between parts is conventional welding or threaded connection, and the production cost is low and the efficiency is high.

Further, the manufacturing method may further include:

One end of the connecting pipe 17 is connected to the second flange 8, the other end of the connecting pipe 17 is connected to the first quick-change connector 13, the first fixing member 9 having the first adjusting groove 91 is fixedly connected to the second flange 8, and a support base 16 for supporting the first quick-change connector 13 is provided between the first quick-change connector 13 and the air supply device 12.

The second quick-change connector 14 is sleeved outside the first injection pipe 1 inserted with the second injection pipe 4, then the first injection pipe 1 inserted with the second injection pipe 4 is inserted into the first quick-change connector 13, the connecting pipe 17, the second flange 8, the sleeve 122 and the second flow passage 121 to extend into the first flow passage 111, and the second quick-change connector 14 is connected with the first quick-change connector 13 in a matched manner.

After the second quick-change connector 14 is connected with the first quick-change connector 13 in a matched manner, a fixed connection is realized between the first fixing piece 9 and the second fixing piece 10 by inserting bolts 15 and nuts of the first adjusting groove 91 and the second adjusting groove, and the first adjusting groove 91 and the second adjusting groove extend along the axial direction of the sleeve 122.

The method can realize the quick replacement of the blast furnace tuyere spray gun in the sleeve 122, ensure the tightness between the first blowing pipe 1 and the sleeve 122 after the blast furnace tuyere spray gun is inserted into the sleeve 122, position and fix one side of the first blowing pipe 1 and the second blowing pipe 4 close to the inlet of the blast furnace tuyere spray gun, prevent the first blowing pipe 1 and the second blowing pipe 4 from inclining and bending, ensure the coaxiality between the inserted parts of the first blowing pipe 1 and the second blowing pipe 4, and ensure the coaxial installation between the first blowing pipe 1 of the second blowing pipe 4 and the sleeve 122 after the blast furnace tuyere spray gun is inserted into the sleeve 122.

The application has the following advantages: 1. by using the blast furnace tuyere spray gun structure, different kinds of combustion media can be respectively input into the first injection pipe 1 and the second injection pipe 4 while oxygen-enriched high-temperature gas is injected at the tuyere, and finally the combustion media are sprayed into the furnace from the inner pipe 72 and the outer pipe 71 of the nozzle 7. When the blast furnace is winded, the first injection pipe and the second injection pipe stop introducing fuel medium, and at the moment, a cooling air source such as compressed air is introduced into the bypass branch for blowing and cooling the injection pipes. Different kinds of combustion media can be gas-gas, gas-liquid and gas-solid combination, so that the multi-phase fuel medium composite injection operation is realized, the reduction reaction of coke and iron ore is promoted, the combustion supporting, the carbon emission reducing and the fuel consumption saving effects are better realized, the smelting effect is improved, and the production cost is reduced. 2. According to the blast furnace tuyere spray gun, the spray head 7 in the manner that the inner pipe 72 and the outer pipe 71 are sleeved is adopted, the first spray pipe 1 and the second spray pipe 4 are sleeved, and when different fuel mediums are sprayed out of the inner pipe 72 and the outer pipe 71 respectively, the fuel mediums sprayed out of the outlet of the first spray pipe 1 can be located in the circumferential direction of the fuel mediums sprayed out of the outlet of the second spray pipe 4, so that the fuel mediums sprayed out of the outlet of the first spray pipe 1 and the fuel mediums sprayed out of the outlet of the second spray pipe 4 are mixed to a certain extent, and then the mixed fuel mediums flow into the furnace, so that the fuel mediums can be combusted fully, and the energy-saving and emission-reducing effects are improved. 3. The blast furnace tuyere spray gun occupies small space, and can be directly matched with the tuyere small sleeve 11 of the blast furnace, so that different mixed fuel media are conveyed into the furnace during spraying, and the safety of the tuyere small sleeve 11 is not affected. 4. By providing the positioning member 73 in the shower head 7, it is ensured that the portion of the second lance 4 inserted in the first lance 1 corresponding to the first lance 1 is coaxially arranged as much as possible; through the cooperation connection of first mounting 9 and second mounting 10, can realize carrying out the location to the side that first blowpipe 1 and second blowpipe 4 are close to self import and fix, prevent that first blowpipe 1 and second blowpipe 4 from taking place the slope bending deformation near the side of self import. 5. The first fixing piece 9 and the second fixing piece 10 are fixed in a detachable mode through the bolts 15 matched with nuts arranged in the first adjusting groove 91 and the second adjusting groove, so that the blast-furnace tuyere spray gun can be quickly replaced through the matching of the first quick-change connector 13 and the second quick-change connector 14, and the distance of the blast-furnace tuyere spray gun extending into the sleeve 122 can be adjusted to a certain extent.

All articles and references, including patent applications and publications, disclosed herein are incorporated by reference for all purposes. The term "consisting essentially of …" describing a combination shall include the identified element, ingredient, component or step as well as other elements, ingredients, components or steps that do not substantially affect the essential novel features of the combination. The use of the terms "comprises" or "comprising" to describe combinations of elements, components, or steps herein also contemplates embodiments consisting essentially of such elements, components, or steps. By using the term "may" herein, it is intended that any attribute described as "may" be included is optional. Multiple elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, component, section or step is not intended to exclude other elements, components, sections or steps.

In this specification, each embodiment is described in a progressive manner, and each embodiment is mainly described by differences from other embodiments, and identical and similar parts between the embodiments are all enough to be referred to each other. The above embodiments are provided to illustrate the technical concept and features of the present invention and are intended to enable those skilled in the art to understand the content of the present invention and implement the same, and are not intended to limit the scope of the present invention. All equivalent changes or modifications made in accordance with the spirit of the present invention should be construed to be included in the scope of the present invention.

Claims (14)

1.A blast furnace tuyere lance, characterized in that it comprises:

the first blowing pipe is provided with a first opening and closing valve, a first bypass branch is connected to the first blowing pipe, and the joint of the first bypass branch and the first blowing pipe is positioned at the downstream of the first opening and closing valve;

the second blowing pipe is provided with a second opening and closing valve, a second bypass branch is connected to the second blowing pipe, and the joint of the second bypass branch and the second blowing pipe is positioned at the downstream of the second opening and closing valve;

A nozzle having an outer tube connected to the outlet of the first lance and an inner tube in communication with the outlet of the second lance;

The section of the second blowing pipe close to the self outlet is inserted into the section of the first blowing pipe close to the self outlet, and a gap is formed between the outer side wall of the second blowing pipe inserted into the first blowing pipe and the inner side wall of the first blowing pipe.

2. The blast furnace tuyere lance of claim 1, wherein the first bypass branch is for connecting a purge, cooling gas source; the second bypass branch is used for connecting a purging and cooling air source.

3. The blast furnace tuyere lance of claim 1, wherein an inlet of the first lance is for inputting a fuel medium; the inlet of the second injection pipe is used for inputting fuel medium.

4. The blast furnace tuyere lance according to claim 1, wherein the second lance inserted in the first lance is coaxially disposed with respect to a portion of the first lance.

5. The blast furnace tuyere lance of claim 4 wherein the outer tube is coaxially arranged with the inner tube; the axis of the outer tube and the axis of a section of the first blowing tube close to the outlet of the first blowing tube are provided with a preset included angle smaller than 180 degrees.

6. The blast furnace tuyere spray gun of claim 1, wherein the first bypass branch is connected to the first lance through a first three-way joint having a first port and a second port located in opposite directions and a third port located at a side, the third port being connected to the first bypass branch, the first port and the second port being connected to the first lance.

7. The blast furnace tuyere spray gun according to claim 1, wherein the second bypass branch is connected to the second lance through a second three-way joint having a fourth port and a fifth port located in opposite directions and a sixth port located at a side, the sixth port being connected to the second bypass branch, and the fourth port and the fifth port being connected to the second lance.

8. The blast furnace tuyere lance of claim 1, further comprising: a second flange through which the first blowing pipe into which the second blowing pipe is inserted; the first fixing piece is fixedly connected to the second flange; the second fixing piece is provided with a first mounting hole and a second mounting hole, a section of the second blowing pipe close to the self inlet is bent relatively close to the self outlet, a section of the first blowing pipe close to the self inlet is bent relatively close to the self outlet, a section of the second blowing pipe close to the self inlet is inserted and fixed in the second mounting hole, a section of the first blowing pipe close to the self inlet is inserted and fixed in the first mounting hole, and fixed connection is realized between the second fixing piece and the first fixing piece in a detachable mode.

9. The blast furnace tuyere spray gun of claim 1, wherein a positioning piece for fixing the inner tube is connected between the outer side wall of the inner tube and the inner side wall of the outer tube of the spray head, and the positioning piece is provided with an output hole; the outer pipe is welded with the outlet of the first jetting pipe, and the outlet of the second jetting pipe is welded with or abutted against the inner pipe so as to fix the second jetting pipe.

10. A blast furnace tuyere injection device, characterized in that the blast furnace tuyere injection device comprises:

a tuyere small sleeve with a first runner; the air supply device is connected with the air port small sleeve and provided with a second flow passage, the second flow passage is communicated with the first flow passage, and a sleeve communicated with the second flow passage is arranged in the side wall of the air supply device; the blast furnace tuyere lance according to any one of claims 1 to 9, which is insertable into said sleeve, a section of a first lance inserted with a second lance near its own outlet extending into said first flow passage through said sleeve, said second flow passage, said inner tube being coaxially arranged with said outer tube.

11. The blast furnace tuyere injection device of claim 10, wherein a first flange is connected to an inlet of the sleeve; the blast furnace tuyere injection device includes: the bracket mechanism comprises a second flange which is matched and connected with the first flange; the first fixing piece is fixedly connected to the second flange and provided with a first adjusting groove extending along the axial direction of the sleeve; one end of the connecting pipe is connected to the second flange; the first quick-change connector is connected to the other end of the connecting pipe;

The blast furnace tuyere spray gun comprises a second fixing piece and a second quick-change connector; the second fixing piece is provided with a first mounting hole and a second mounting hole, a section of the second blowing pipe close to the self inlet is bent relatively to a section of the second blowing pipe close to the self outlet, a section of the first blowing pipe close to the self inlet is bent relatively to a section of the second blowing pipe close to the self outlet, a section of the second blowing pipe close to the self inlet is inserted and fixed in the second mounting hole, a section of the first blowing pipe close to the self inlet is inserted and fixed in the first mounting hole, and the second fixing piece is provided with a second adjusting groove extending along the axial direction of the sleeve; the position of the first adjusting groove relative to the second adjusting groove can be adjusted in the axial direction of the sleeve, and the first fixing piece and the second fixing piece are fixedly connected through bolts and nuts inserted into the first adjusting groove and the second adjusting groove; the first injection pipe with the second injection pipe inserted is sleeved with the second quick-change connector, the first injection pipe with the second injection pipe inserted can be inserted into the first quick-change connector, the connecting pipe, the second flange, the sleeve and the second flow passage extend into the first flow passage, and the second quick-change connector is connected with the first quick-change connector in a matched mode.

12. The blast furnace tuyere injection device of claim 11, wherein the bracket mechanism further comprises a supporting base having an upper end surface parallel to the axis of the sleeve, the supporting base is connected to the air supply device, and the lower end of the first quick change connector is disposed on the upper end surface of the supporting base.

13. A method of manufacturing a blast furnace tuyere lance according to any of claims 1 to 9, characterized in that the manufacturing method comprises:

Forming a notch on the side wall of a first blowing pipe, inserting a second blowing pipe into the first blowing pipe from the notch, and adjusting the outlet of the first blowing pipe to be positioned at the same position as the outlet of the second blowing pipe;

Bending a part of the first blowing pipe, which is not inserted with the second blowing pipe, bending a part of the second blowing pipe, which is not inserted with the first blowing pipe, wherein the bending direction of the first blowing pipe is the same as and parallel to the bending direction of the second blowing pipe, and then plugging the notch;

According to the first distance between the first blowing pipe and the second blowing pipe after bending, a first mounting hole and a second mounting hole which are spaced at the first distance are formed in a second fixing piece, and a second adjusting groove is formed in the second fixing piece;

Inserting and fixing a bent section of the second injection pipe in the second mounting hole, and inserting and fixing a section of the first injection pipe close to the inlet of the first injection pipe in the first mounting hole;

The inlet of the first blowing pipe is connected with a first bypass branch through a first three-way joint, the first three-way joint is provided with a first port and a second port which are positioned in opposite directions and a third port positioned at the side, the third port is connected with the first bypass branch, and the first port and the second port are respectively connected with the first blowing pipe and a first valve;

The inlet of the second blowing pipe is connected with the second bypass branch through a second three-way joint, the second three-way joint is provided with a fourth port and a fifth port which are positioned in opposite directions and a sixth port positioned at the side, the sixth port is connected with the second bypass branch, and the fourth port and the fifth port are respectively connected with the second blowing pipe and a second valve;

And connecting an outer pipe of the spray head at the outlet of the second spraying pipe, and enabling the inner pipe to be communicated with the outlet of the second spraying pipe.

14. The method of manufacturing according to claim 13, wherein a tuyere small sleeve is attached to the furnace body, the tuyere small sleeve has a first flow passage, an air supply device is attached to the tuyere small sleeve, the air supply device has a second flow passage, a sleeve communicating with the second flow passage is provided in a side wall of the air supply device, and a first flange is attached to an inlet of the sleeve;

The manufacturing method further comprises the steps of:

connecting one end of a connecting pipe to a second flange, connecting the other end of the connecting pipe to a first quick-change connector, fixedly connecting a first fixing piece with a first adjusting groove to the second flange, and arranging a supporting base for supporting the first quick-change connector between the first quick-change connector and the air supply device;

a second quick-change connector is sleeved outside the first injection pipe inserted with the second injection pipe, then the first injection pipe inserted with the second injection pipe is inserted into the first quick-change connector, the connecting pipe, the second flange, the sleeve and the second flow passage extend into the first flow passage, and the second quick-change connector is connected with the first quick-change connector in a matched manner;

After the second quick-change connector is connected with the first quick-change connector in a matched mode, a first adjusting groove and a second adjusting groove are inserted between the first fixing piece and the second fixing piece to achieve fixed connection, and the first adjusting groove and the second adjusting groove extend along the axial direction of the sleeve.