CN218811854U - Blast furnace tuyere spray gun and blast furnace tuyere blowing device - Google Patents

Abstract

The utility model discloses a blast furnace tuyere spray gun and blast furnace tuyere jetting device, it relates to the metallurgical technology field, and blast furnace tuyere spray gun includes: the first injection pipe is provided with a first opening-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-closing valve; a second injection pipe is provided with a second opening-closing valve, a second bypass branch is connected to the second injection pipe, and the joint of the second bypass branch and the second injection pipe is positioned at the downstream of the second opening-closing valve; the nozzle is provided with an outer pipe and an inner pipe, the outer pipe is connected with the outlet of the first blowing pipe, and the inner pipe is communicated with the outlet of the second blowing pipe; and so on. The multi-phase fuel medium composite injection device can be suitable for multi-phase medium composite injection at the tuyere of the blast furnace, and realizes multi-phase fuel medium composite injection operation of gas, liquid, gas and solid and the like while injecting oxygen-enriched high-temperature gas at the tuyere.

Description

Blast furnace tuyere spray gun and blast furnace tuyere blowing device

Technical Field

The utility model relates to the technical field of metallurgy, in particular to a blast furnace tuyere spray gun and a blast furnace tuyere blowing device.

Background

The tuyere of the iron-making blast furnace generally blows oxygen-rich high-temperature gas from the tuyere into the blast furnace through an air supply device, the high-temperature hot air reacts with fuel (coke and coal powder) in the blast furnace to generate CO, and the CO reduces iron oxide in iron ore to generate iron. In order to promote the reduction reaction of fuel (coke and coal powder) and iron ore, when the tuyere injects oxygen-enriched high-temperature gas, solid and liquid fuel is simultaneously injected, thereby improving the smelting effect.

In the prior art, some air outlet openings are formed in the end face of the air outlet small sleeve, but if more media are required to be blown, the safety of the structural design of the air outlet small sleeve is limited, and the technical difficulty is very high. For example, in a tuyere stock blowing device, the front end of a belly pipe is closely attached to the rear end of a tuyere small sleeve, the rear end of a spray gun is adjustably inserted into 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 tuyere small sleeve. The tuyere injection device can only realize single-phase fuel medium injection operation, if a plurality of belly pipes are arranged in the circumferential direction of the belly pipes, not only are processing and manufacturing procedures increased, but also after multi-phase fuel medium at the outlet of the spray gun is injected into the tuyere, the multi-phase fuel medium flows along the main airflow in a divergent mode, and the mixed combustion effect is poor; and the spray gun is also arranged in the straight blow pipe in an inserting way, and the installation angle is adjusted according to the angle of the tuyere small sleeve, so the angle adjustment range is limited, and the sprayed medium is single.

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

SUMMERY OF THE UTILITY MODEL

In order to overcome the above-mentioned defect of prior art, the embodiment of the utility model provides a technical problem that will solve provides a blast furnace tuyere spray gun and blast furnace tuyere spray device, and it can be applicable to the compound jetting of the heterogeneous medium of blast furnace tuyere, in the wind gap jetting oxygen boosting high temperature gas, realizes the compound jetting operation of heterogeneous fuel medium such as gas, gas-liquid, gas-solid.

The embodiment of the utility model provides a concrete technical scheme is:

a blast furnace tuyere spray gun comprising:

the first injection pipe is provided with a first open-close valve, a first bypass branch is connected to the first injection pipe, and the joint of the first bypass branch and the first injection pipe is positioned at the downstream of the first open-close valve;

the second injection pipe is provided with a second open-close valve, a second bypass branch is connected to the second injection pipe, and the joint of the second bypass branch and the second injection pipe is positioned at the downstream of the second open-close valve;

the nozzle is provided with an outer pipe and an inner pipe, the outer pipe is connected with the outlet of the first injection pipe, and the inner pipe is communicated with the outlet of the second injection pipe;

one section of the second blowing pipe close to the outlet of the second blowing pipe is inserted into one section of the first blowing pipe close to the outlet of the first blowing pipe, 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 gas source; the second bypass branch is used for connecting a purging gas source and a cooling gas source.

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

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

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

Preferably, the first bypass branch is connected to the first injection pipe through a first three-way joint, the first three-way joint has a first port and a second port located in opposite directions, and a third port located on 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 injection pipe.

Preferably, the second bypass branch is connected to the second injection pipe through a second three-way joint, the second three-way joint has a fourth port and a fifth port located in opposite directions, and a sixth port located on a lateral side, the sixth port is connected to the second bypass branch, and the fourth port and the fifth port are connected to the second injection pipe.

Preferably, the blast furnace tuyere spray gun further comprises: a second flange through which the first blowing pipe inserted with 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, one section, close to the inlet of the second blowing pipe, of the second blowing pipe is bent, one section, close to the outlet of the second blowing pipe, of the second blowing pipe is bent, one section, close to the inlet of the first blowing pipe, of the first blowing pipe is bent, one section, close to the outlet of the first blowing pipe, of the second blowing pipe is inserted and fixed in the second mounting hole, one section, close to the inlet of the first blowing pipe, of the first blowing pipe is inserted and fixed in the first mounting hole, and the second fixing piece is fixedly connected with 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 connected with the outlet of the first blowing pipe in a welding mode, and the outlet of the second blowing pipe is connected with the inner pipe in a welding mode or is tightly abutted to the inner pipe, so that the second blowing pipe is positioned and fixed.

A blast furnace tuyere injection device, comprising:

a tuyere small sleeve with a first flow passage; the air supply device is connected with the tuyere small sleeve and is provided with a second flow channel, the second flow channel is communicated with the first flow channel, and a sleeve communicated with the second flow channel is arranged in the side wall of the air supply device; the blast furnace tuyere spray gun can be inserted into the sleeve, a section, close to an outlet of the first spray pipe, of the first spray pipe inserted with the second spray 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, a first flange is connected to the 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; a connecting pipe, one end of which 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, one section of the second injection pipe close to the inlet of the second injection pipe is bent relatively close to the outlet of the second injection pipe, one section of the first injection pipe close to the inlet of the first injection pipe is bent relatively close to the outlet of the first injection pipe, one section of the second injection pipe close to the inlet of the second injection pipe is inserted and fixed in the second mounting hole, one section of the first injection pipe close to the inlet of the first injection pipe 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 blowing pipe inserted with the second blowing pipe is sleeved and connected with the second quick-change connector, the first blowing pipe inserted with the second blowing pipe can be inserted into the first quick-change connector, the connecting pipe, the second flange, the sleeve and the second flow channel and extend into the first flow channel, and the second quick-change connector is connected with the first quick-change connector in a matched mode.

Preferably, the support 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.

The technical scheme of the utility model following beneficial effect that is showing has:

1. utilize blast furnace tuyere spray gun structure in this application can be when the tuyere jetting oxygen boosting high temperature gas with different types of combustion medium input respectively to first jetting pipe and second jetting pipe in, spout to the stove in from the inner tube and the outer tube of shower nozzle at last. When the blast furnace is repaired, the fuel medium is stopped to be introduced into the first injection pipe and the second injection pipe, and a cooling air source such as compressed air is introduced into the bypass branch for blowing and cooling the injection pipes. The different 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 effects of supporting combustion, reducing carbon emission and saving fuel consumption are better played, the smelting effect is improved, and the production cost is reduced.

2. The utility model provides a shower nozzle in blast furnace tuyere spray gun adopts the mode that inner tube and outer tube established the cover, the mode that first injection pipe and second injection pipe also adopted the cover to establish, when different fuel medium jetted out respectively from inner tube and outer tube, fuel medium that the export jetting of first injection pipe was gone out just can be located the fuel medium circumference that the export jetting of second injection pipe was gone out, thereby can make the fuel medium that the export jetting of first injection pipe was gone out and the fuel medium that the export jetting of second injection pipe was gone out carry out the mixture of certain degree, the fuel medium after the later mixture flows into to the stove again, can make the fuel medium burning abundant like this, improve energy saving and emission reduction effect.

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

Specific embodiments of the present invention are disclosed in detail with reference to the following description and the accompanying drawings, which specify the manner in which the principles of the invention may be employed. It should be understood that the embodiments of the present 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, the proportional sizes, and the like of the respective members in the drawings are merely illustrative for helping the understanding of the present invention, and do not specifically limit the shapes, the proportional sizes, and the like of the respective members of the present invention. The skilled person in the art can, under the teaching of the present invention, choose various possible shapes and proportional dimensions to implement the invention according to the specific situation.

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

fig. 2 is a schematic structural diagram of the spray head, the first injection pipe and the second injection pipe in the embodiment of the present invention;

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

fig. 4 is a side view of a sprinkler head in an embodiment of the invention;

fig. 5 is a front view of the first fixing member and the second fixing member in the embodiment of the present invention, wherein the first fixing member and the second fixing member are connected to each other by a second flange;

fig. 6 is a top view of the first fixing member and the second fixing member in the embodiment of the present invention, wherein the first fixing member and the second fixing member are connected to each other by a second flange;

fig. 7 is a schematic structural diagram of the casing pipe connected with the first flange installed in the air supply device according to the embodiment of the present invention;

FIG. 8 is a schematic structural view of a blast furnace tuyere stock blasting device in an embodiment of the present invention;

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.

Reference numerals of the above figures:

1. a first blowing pipe; 2. a first on-off valve; 3. a first three-way joint; 4. a second blowing pipe; 5. a second on-off valve; 6. a second three-way joint; 7. a spray head; 71. an outer tube; 72. an inner tube; 73. a positioning member; 731. an output aperture; 8. a second flange; 9. a first fixing member; 91. a first adjustment groove; 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. a rib plate; 13. a first quick-change connector; 14. a second quick-change connector; 15. a bolt; 16. a support base; 17. a connecting pipe; 100. blast furnace tuyere spray gun.

Detailed Description

The details of the present invention can be more clearly understood with reference to the accompanying drawings and the description of the embodiments of the present invention. However, the specific embodiments of the present invention described herein are for the purpose of explanation only, and should not be construed as limiting the invention in any way. Given the teachings of the present invention, the skilled person can conceive of any possible variants based on the invention, which should all be considered as belonging to the scope of the 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," and "connected" are to be construed broadly and may include, for example, mechanical or electrical connections, communications between two elements, direct connections, indirect connections through intermediaries, and the like. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique 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 present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In order to be applicable to the compound jetting of the heterogeneous medium of blast furnace tuyere, when tuyere jetting oxygen boosting high temperature gas, realize the compound jetting operation of heterogeneous fuel medium such as gas, gas-liquid, gas-solid, provided a blast furnace tuyere spray gun in this application, figure 1 is the utility model discloses in the embodiment of the structure schematic diagram of blast furnace tuyere spray gun, as shown in figure 1, blast furnace tuyere spray gun includes: the device comprises a first blowing pipe 1, a first open-close valve 2, a first bypass branch, a second blowing pipe 4, a second open-close valve 5, a second bypass branch and a spray head 7.

As shown in fig. 1, a first open/close valve 2 may be disposed on the first blowing pipe 1, a first bypass branch is connected to the first blowing pipe 1, and a connection point of the first bypass branch and the first blowing pipe 1 is located downstream of the first open/close valve 2. The first on-off valve 2 can control the on-off of the first injection pipe 1, and can also control the communication degree of the first injection pipe 1, thereby controlling the flow rate of the fuel medium input into the first injection pipe 1. For example, the first open/close valve 2 may be a valve whose opening degree can be adjusted. The first bypass branch is used for connecting a blowing and cooling air source, for example, the first bypass branch can be connected with a compressed air blowing, a nitrogen gas blowing 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 blown out by inputting a purging gas through the first bypass branch to purge the fuel medium to the nozzle 7.

In order to facilitate the connection of a first bypass branch to the first blowing pipe 1 during the machining process, the first blowing pipe 1 may be connected to a first bypass branch through a first three-way joint 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 on a side, the third port being connected to the first bypass branch, the first port and the second port being connected to the first injection pipe 1. The first three-way joint 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 on-off valve 5 is provided in the second blowing pipe 4, a second bypass branch is connected to the second blowing pipe 4, and the junction between the second bypass branch and the second blowing pipe 4 is located downstream of the second on-off valve 5. The second open/close valve 5 can control the opening/closing of the second injection pipe 4, and thus can control whether or not the fuel medium is supplied to the second injection pipe 4. The second bypass branch is used for connecting with a blowing and cooling air source, for example, the second bypass branch can be connected with a compressed air blowing and nitrogen blowing, and is connected with the cooling air source through a cooling pipeline air source. Likewise, 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 blown out by blowing the fuel medium to the nozzle 7 through the input of the purge gas of the second bypass branch.

In order to facilitate the processing process, a second bypass branch is connected to the second injection pipe 4, and the second bypass branch can be connected to the second injection pipe 4 through a second three-way joint 6. As a practical matter, 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 has a fourth port and a fifth port located in opposite directions, and a sixth port located on a side, the sixth port is connected with the second bypass branch, and the fourth port and the fifth port are connected with 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 injection tube 1 is larger than the outer diameter of the second injection tube 4, so that a section of the second injection tube 4 near the outlet thereof is inserted into a section of the first injection tube 1 near the outlet thereof, and a gap is provided between the outer side wall of the second injection tube 4 inserted into the first injection tube 1 and the inner side wall of the first injection tube 1, thereby ensuring that the fuel medium and the purge gas inputted into the first injection tube 1 can be injected from the outlet of the first injection tube 1.

Fig. 2 is a schematic structural diagram of the spray head, the first blowing pipe 1 and the second blowing pipe 4 in the embodiment of the present invention, and as shown in fig. 1 and fig. 2, the spray head 7 may have an outer pipe 71 and an inner pipe 72, and the outer pipe 71 is sleeved outside the inner pipe 72. The outer tube 71 is connected to the outlet of the first blowing pipe 1, and the inner tube 72 is connected to the outlet of the second blowing pipe 4. The outer pipe 71 is welded to the outlet of the first blowing pipe 1, and the inner pipe 72 abuts against or is connected to the outlet of the second blowing pipe 4 to achieve communication.

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

Since the second blowing pipe 4 inserted into the first blowing pipe 1 is long and may be inclined, bent, deformed and fluctuated to some extent due to 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 and the inner side wall of the outer pipe 71 of the head 7, 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 injection tube 1. The positioning member 73 may be annular, an outer sidewall of the positioning member 73 abuts against an inner sidewall of the outer tube 71, and an inner sidewall of the positioning member 73 abuts against an outer sidewall of the inner tube 72. The outer pipe 71 can be welded with the outlet of the first blowing pipe 1, and the outlet of the second blowing pipe 4 is welded with or tightly pressed against the inner pipe 72, so as to realize the positioning and fixing of the second blowing pipe 4.

The sizes of the inner tube 72 and the outer tube 71 of the nozzle 7 need to be determined by calculating according to the pressure and the flow rate of the fuel medium corresponding to the inner tube 72 and the outer tube 71, and the pressures of the media sprayed and blown out from the inner tube 72 and the outer tube 71 need to be ensured to be basically the same, so that the effect of instantaneous and efficient mixing when the fuel medium is sprayed out is improved. As shown in fig. 3, the outlets of the inner tube 72 and the outer tube 71 of the nozzle 7 are a section of special-shaped pipe, and one end of the outlet is an oval cross section, that is, the outlet ends of the inner tube 72 and the outer tube 71 are cut into inclined planes. The axis of the outer pipe 71 and the axis of a section of the first blowing pipe 1 close to the outlet of the first blowing pipe have a preset included angle smaller than 180 degrees.

In order to fix the first blowing pipe 1 and the second blowing pipe 4 near the side of the self-inlet and prevent the inclined bending between the first blowing pipe 1 and the second blowing pipe 4, fig. 5 is a front view of the first fixing member and the second fixing member in the embodiment of the present invention, as shown in fig. 5 and fig. 6, and fig. 6 is a top view blast furnace tuyere spray gun in the embodiment of the present invention, in which the first fixing member and the second fixing member in the second flange are connected in a matching manner, the blast furnace tuyere spray gun in the embodiment of the present invention may include: a second flange 8 through which the first blowing pipe 1 into which the second blowing pipe 4 is inserted through the second flange 8; a first fixing member 9 fixedly coupled to the second flange 8; the second fixing piece 10 is provided with a first mounting hole 101 and a second mounting hole 102, one section of the second injection pipe 4 close to the inlet of the second fixing piece is bent relatively close to the outlet of the second fixing piece, one section of the first injection pipe 1 close to the inlet of the first injection pipe is bent relatively close to the outlet of the first injection pipe, one section of the second injection pipe 4 close to the inlet of the second injection pipe is inserted and fixed in the second mounting hole 102, one section of the first injection pipe 1 close to the inlet of the first injection pipe is inserted and fixed in the first mounting hole 101, and the second fixing piece 10 is fixedly connected with the first fixing piece 9 in a detachable mode. In order to improve the fixing strength and precision, a section of the second injection pipe 4 close to the inlet of the second injection pipe can be inserted and fixed in the second mounting hole 102 by welding, and similarly, a section of the first injection pipe 1 close to the inlet of the second injection pipe can be 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, the second fixing member 10 may have a second adjustment groove extending in the axial direction of the sleeve 122, and the first fixing member 9 and the second fixing member 10 may be detachably fixed by engaging a nut with a bolt 15 provided in the first adjustment groove 91 and the second adjustment groove.

Still proposed a blast furnace tuyere jetting device in this application, fig. 7 is the embodiment of the utility model provides an in the embodiment of the structure schematic diagram of bushing installation in air supply arrangement that is connected with first flange, fig. 8 is the embodiment of the utility model provides an in the embodiment of the structure schematic diagram of blast furnace tuyere jetting device, as shown in fig. 7 and fig. 8, blast furnace tuyere jetting device can include: a tuyere small sleeve 11 having a first flow passage 111; the air supply device 12 is connected with the tuyere small sleeve 11 and is provided with a second flow passage 121, 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; in any of the above blast furnace tuyere spray guns 100, the blast furnace tuyere spray gun 100 can be inserted into the sleeve 122, a section of the first injection pipe 1 into which the second injection pipe 4 is inserted, which is close to the outlet thereof, extends into the first flow passage 111 through the sleeve 122 and the second flow passage 121, and the inner pipe 72 is disposed coaxially with the outer pipe 71. The tuyere small sleeve 11 is arranged on the furnace body, and the first flow channel 111 can be communicated with the inside of the furnace. The air blowing device 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 casing 122 may be connected to the casing of the air supply device 12 by a plurality of ribs 124. In this way, the blast furnace tuyere stock 100 can be installed in the sleeve 122 of the air supply device 12 of the blast furnace tuyere stock blowing device, and the nozzle 7 can be inserted into the first flow channel 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 structure occupies a small space, can mix 2 kinds of fuel media, and can directly convey the fuel media, which are mixed to a certain degree when being output from the nozzle 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, the axis of the second blowing pipe 4, the axis of the inner pipe 72 and the outer pipe 71 of the shower head 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 degree between the axis of the outer pipe 71 and the axis of a section of the first blowing pipe 1 close to the outlet of the first blowing pipe 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 pipe 72 and the outer pipe 71 of the nozzle 7 and the axis of the tuyere small sleeve 11 are in the same straight line. Therefore, the mixed fuel medium sprayed and blown out from the inner pipe 72 and the outer pipe 71 of the nozzle 7 can flow 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 can be prevented from being scoured and worn by the airflow of the sprayed fuel by changing the flow direction of the fuel medium sprayed and blown out 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 blast furnace tuyere stock 100 in the sleeve 122 for quick replacement, a first flange 123 is attached to the inlet of the sleeve 122. Fig. 9 is a schematic structural diagram of a matching joint of a first quick-change connector and a second quick-change connector in an embodiment of the present invention, as shown in fig. 8 and 9, a 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 the axial direction of the sleeve 122; a connection pipe 17 having one end connected to the second flange 8; a first quick-change coupling 13 connected to the other end of the coupling tube 17. The blast furnace tuyere stock 100 comprises a second holder 10 and a second quick-change coupling 14. The first fixing member 9 and the second fixing member 10 are fixedly connected by a bolt 15 and a nut inserted into the first adjustment groove 91 and the second adjustment groove. The first blowing pipe 1 inserted with the second blowing pipe 4 is sleeved with a 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 channel 121 and extend into the first flow channel 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 coupler 14 is unscrewed from the first quick-change coupler 13, the first fixing member 9 and the second fixing member 10 are unscrewed by the bolts 15 and the nuts inserted into the first adjustment groove 91 and the second adjustment groove to enable the first fixing member 9 and the second fixing member 10 to be separated, and then the first injection pipe 1 with the second injection pipe 4 inserted therein can be pulled out from the first quick-change coupler 13, the connecting pipe 17, the second flange 8, the sleeve 122, and the like.

In the above configuration, the relative position between the first adjustment groove 91 and the second adjustment groove is adjusted, whereby the depth of insertion of the blast furnace tuyere stock 100 into the sleeve 122 and the first flow path 111 of the tuyere small sleeve 11 can be adjusted. When the second quick-change connector 14 is matched and connected with the first quick-change connector 13, the blast furnace tuyere spray gun 100 can be quickly replaced in the sleeve 122, and the sealing performance 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 possibility, as shown in fig. 8 and 9, the holder mechanism may comprise 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 coupler 13 being disposed on the upper end surface of the support base 16. Thus, the position of the first quick-change connector 13 can be more stable, and when the blast furnace tuyere spray gun 100 is inserted into the sleeve 122, the second quick-change connector 14 of the blast furnace tuyere spray gun 100 is connected and sealed with the first quick-change connector 13, so that the coaxial installation between the first injection pipe 1 of the second injection pipe 4 and the sleeve 122 after the blast furnace tuyere spray gun 100 is inserted is ensured.

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 at the same position.

The part of the first blowing pipe 1, in which the second blowing pipe 4 is not inserted, is bent, the part of the second blowing pipe 4, in which the first blowing pipe 1 is not inserted, is bent, 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 the incision is closed.

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

A bent section of the second blowing pipe 4 is inserted and fixed into the second mounting hole 102, and a 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 injection 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 located in opposite directions and a third port which is located on 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 injection pipe 1 and the first on-off valve 2.

The inlet of the second injection 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 arranged in opposite directions, and a sixth port which is arranged on 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 injection pipe 4 and a second on-off valve 5.

The outer tube 71 of the sprinkling head 7 is connected to the outlet of the second sprinkling tube 4, and the inner tube 72 is made to communicate with the outlet of the second sprinkling tube 4.

The blast furnace tuyere spray gun in the application can be processed by the manufacturing method, the whole manufacturing method is simple and convenient, complex parts are not required to be processed, the installation and connection among the parts are conventional welding or threaded connection, and the cost, the efficiency and the height are low.

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 then a supporting base 16 for supporting the first quick-change connector 13 is arranged between the first quick-change connector 13 and the air supply device 12.

The second quick-change connector 14 is sleeved and connected outside the first blowing pipe 1 with the second blowing pipe 4 inserted, then the first blowing pipe 1 with the second blowing pipe 4 inserted is inserted into the first quick-change connector 13, the connecting pipe 17, the second flange 8, the sleeve 122 and the second flow channel 121 and extends into the first flow channel 111, and then the second quick-change connector 14 is matched and connected with the first quick-change connector 13.

After the second quick-change coupler 14 is coupled with the first quick-change coupler 13, a fixed connection is achieved between the first holder 9 and the second holder 10 by means of a bolt 15 and a nut inserted into a first adjustment groove 91 and a second adjustment groove, which extend in the axial direction of the sleeve 122.

By the method, the blast furnace tuyere spray gun can be quickly replaced in the sleeve 122, the sealing property between the first injection pipe 1 and the sleeve 122 after the blast furnace tuyere spray gun is inserted into the sleeve 122 can be ensured, one sides of the first injection pipe 1 and the second injection pipe 4 close to the inlets of the first injection pipe 1 and the second injection pipe 4 can be positioned and fixed, the first injection pipe 1 and the second injection pipe 4 are prevented from being bent obliquely, the coaxiality between the inserted parts of the first injection pipe 1 and the second injection pipe 4 is ensured, and the coaxial installation between the first injection pipe 1 and the sleeve 122 of the second injection pipe 4 and the insertion of the blast furnace tuyere spray gun can be ensured.

The following advantages may be present in the present application: 1. by utilizing the blast furnace tuyere spray gun structure in the application, different types of combustion media can be respectively input into the first injection pipe 1 and the second injection pipe 4 while the tuyere sprays oxygen-enriched high-temperature gas, and finally the combustion media are sprayed out of the inner pipe 72 and the outer pipe 71 of the spray head 7 into the furnace. When the blast furnace is repaired, the fuel medium is stopped to be introduced into the first injection pipe and the second injection pipe, and a cooling air source, such as compressed air, is introduced into the bypass branch for purging and cooling the injection pipes. The different combustion media can be gas-gas, gas-liquid and gas-solid combination, thereby realizing the composite injection operation of the multi-phase fuel media, promoting the reduction reaction of coke and iron ore, better playing the roles of supporting combustion, reducing carbon emission and saving fuel consumption, improving the smelting effect and reducing the production cost. 2. The utility model provides a mode that the cover was established to shower nozzle 7 in blast furnace tuyere spray gun adopts inner tube 72 and outer tube 71, first injection pipe 1 also adopts the mode of establishing with the second injection pipe 4, when different fuel medium jetted out respectively from inner tube 72 and outer tube 71, fuel medium that jets out from the export of first injection pipe 1 just can be located the fuel medium circumference that jets out from the export of second injection pipe 4, thereby can make fuel medium that jets out from the export of first injection pipe 1 and fuel medium that jets out from the export of second injection pipe 4 carry out the mixture of certain degree, fuel medium after the later mixture flows into to the stove again, can make the fuel medium burning abundant like this, improve energy saving and emission reduction effect. 3. The blast furnace tuyere spray gun occupies small space, can be directly matched with the tuyere small sleeve 11 of the blast furnace for use, thereby conveying different fuel media after mixing to the furnace during spraying, and avoiding affecting the safety of the tuyere small sleeve 11. 4. The positioning piece 73 is arranged in the spray head 7, so that the part of the second injection pipe 4 inserted in the first injection pipe 1, which corresponds to the first injection pipe 1, is ensured to be arranged coaxially as much as possible; through the matching connection of the first fixing piece 9 and the second fixing piece 10, the first injection pipe 1 and the second injection pipe 4 close to the inlet of the injection pipe can be positioned and fixed, and the first injection pipe 1 and the second injection pipe 4 are prevented from being inclined, bent and deformed close to the inlet of the injection pipe. 5. The bolts 15 arranged in the first adjusting groove 91 and the second adjusting groove are matched with the nuts to realize the fixation between the first fixing part 9 and the second fixing part 10 in a detachable mode, 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 degree.

All articles and references disclosed, including patent applications and publications, are incorporated by reference herein for all purposes. The term "consisting essentially of …" describing a combination shall include the identified elements, components, parts or steps as well as other elements, components, parts or steps that do not materially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe combinations of elements, components, or steps herein also contemplates embodiments that consist essentially of such elements, components, or steps. By using the term "may" herein, it is intended to indicate that any of the attributes described that "may" include are optional. A plurality of 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, ingredient, component or step is not intended to foreclose other elements, ingredients, components or steps.

The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims (12)

1. A blast furnace tuyere spray gun characterized in that it comprises:

the first injection pipe is provided with a first open-close valve, a first bypass branch is connected to the first injection pipe, and the joint of the first bypass branch and the first injection pipe is positioned at the downstream of the first open-close valve;

the second injection pipe is provided with a second open-close valve, a second bypass branch is connected to the second injection pipe, and the joint of the second bypass branch and the second injection pipe is positioned at the downstream of the second open-close valve;

the nozzle is provided with an outer pipe and an inner pipe, the outer pipe is connected with the outlet of the first injection pipe, and the inner pipe is communicated with the outlet of the second injection pipe;

one section of the second blowing pipe close to the outlet of the second blowing pipe is inserted into one section of the first blowing pipe close to the outlet of the first blowing pipe, 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 spray gun of claim 1, wherein the first bypass branch is used for connecting a purging and cooling gas source; the second bypass branch is used for connecting a purging gas source and a cooling gas source.

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

4. The blast furnace tuyere spray gun according to claim 1, wherein a portion of said second injection tube inserted into said first injection tube corresponding to said first injection tube is coaxially provided.

5. The blast furnace tuyere lance of claim 4, wherein the outer pipe is disposed coaxially with the inner pipe; and a preset included angle smaller than 180 degrees is formed between the axis of the outer pipe and the axis of a section of the first blowing pipe close to the outlet of the first blowing pipe.

6. The blast furnace tuyere spray gun of claim 1, wherein said first bypass branch is connected to said first injection tube by a first three-way joint having a first port and a second port in opposite directions and a third port in a side, said third port being connected to said first bypass branch, said first port and said second port being connected to said first injection tube.

7. The blast furnace tuyere spray gun of claim 1, wherein said second bypass branch is connected to said second injection tube by a second three-way joint having a fourth port and a fifth port in opposite directions and a sixth port in a side direction, said sixth port being connected to said second bypass branch, said fourth port and said fifth port being connected to said second injection tube.

8. The blast furnace tuyere lance of claim 1, further comprising: a second flange through which the first blowing pipe inserted with 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, one section of the second injection pipe, which is close to the inlet of the second injection pipe, is bent relatively close to the outlet of the second injection pipe, one section of the first injection pipe, which is close to the inlet of the first injection pipe, is bent relatively close to the outlet of the first injection pipe, one section of the second injection pipe, which is close to the inlet of the second injection pipe, is inserted and fixed in the second mounting hole, one section of the first injection pipe, which is close to the inlet of the first injection pipe, is inserted and fixed in the first mounting hole, and the second fixing piece is fixedly connected with 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 connected with the outlet of the first injection pipe in a welding mode, and the outlet of the second injection pipe is connected with the inner pipe in a welding mode or tightly abutted to achieve positioning and fixing of the second injection pipe.

10. The blast furnace tuyere injection device is characterized by comprising:

a tuyere stock having a first flow passage; the air supply device is connected with the tuyere small sleeve and is 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 claims 1 to 9, which is insertable into said sleeve, a section of a first injection tube into which a second injection tube is inserted near its outlet extending through said sleeve, said second flow passage into said first flow passage, said inner tube being disposed coaxially with said outer tube.

11. The blast furnace tuyere blast apparatus of claim 10, wherein a first flange is connected to an inlet of said sleeve; the blast furnace tuyere injection device comprises: 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; a connecting pipe, one end of which 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, one section of the second injection pipe close to the inlet of the second injection pipe is bent relatively close to the outlet of the second injection pipe, one section of the first injection pipe close to the inlet of the first injection pipe is bent relatively close to the outlet of the first injection pipe, one section of the second injection pipe close to the inlet of the second injection pipe is inserted and fixed in the second mounting hole, one section of the first injection pipe close to the inlet of the first injection pipe 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 blowing pipe inserted with the second blowing pipe is sleeved with the second quick-change connector, the first blowing pipe inserted with the second blowing pipe can be inserted into the first quick-change connector, the connecting pipe, the second flange, the sleeve and the second flow channel and extend into the first flow channel, and the second quick-change connector is connected with the first quick-change connector in a matched mode.

12. The blast furnace tuyere stock-blowing device of claim 11, wherein the holder mechanism further comprises a support base having an upper end surface parallel to the axis of the sleeve, the support base being connected to the air-blowing device, the lower end of the first quick-change coupler being disposed on the upper end surface of the support base.

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