CN210314333U

CN210314333U - Pulverized coal injection and oxygen enrichment device for blast furnace

Info

Publication number: CN210314333U
Application number: CN201920806861.7U
Authority: CN
Inventors: 王怀远; 黄文庆
Original assignee: Tongling Rotary Special Steel Co Ltd
Current assignee: Tongling Rotary Special Steel Co Ltd
Priority date: 2019-05-31
Filing date: 2019-05-31
Publication date: 2020-04-14
Anticipated expiration: 2029-05-31

Abstract

The utility model discloses a blast furnace jetting buggy and oxygen boosting device, including powder storehouse, jetting jar, distributor and elbow, the bottom in powder storehouse is linked together through coupling hose and jetting jar, the bottom of jetting jar is connected with the blender through coal valve down, the output of blender is connected through the import of pipeline with the distributor, the exit sealing connection of distributor has a plurality of coal-injection gun, coal-injection gun's other end sealing connection has the oxygen coal rifle, hot-blast main has been seted up to the inside of elbow, the inside of elbow is close to the hot-blast main turning and link up and has seted up the peephole passageway, be equipped with the internal thread on the inner wall of peephole passageway. The utility model discloses can prolong the contact time of oxygen coal gas mixture flow and hot gas flow, avoid the oxygen coal rifle to receive the impact of hot-blast stream and destroy structural strength, the effectual life who prolongs the oxygen gun pipe, the oxygen coal rifle adopts the screw thread mode simultaneously, connects and fixed effect is superior to traditional mode.

Description

Pulverized coal injection and oxygen enrichment device for blast furnace

Technical Field

The utility model relates to an oxygen boosting manufacture equipment field especially relates to blast furnace jetting buggy and oxygen boosting device.

Background

The coal powder injection of the blast furnace through the tuyere becomes one of the most effective measures for saving coke and improving the smelting process, not only can replace coke which is increasingly short of the blast furnace, but also is beneficial to improving the smelting process, expanding a convolution area in front of the tuyere, reducing a stagnation area, reducing the theoretical combustion temperature in front of the tuyere, being beneficial to improving the air temperature and adopting oxygen-enriched air blast, particularly combining coal powder injection and oxygen-enriched air blast, achieving good effects in coke saving and yield increase, improving the utilization rate of carbon monoxide, improving the hydrogen content of coal gas in the blast furnace, improving the reduction process and the like, in a word, the coal powder injection of the blast furnace is beneficial to coke saving and yield increase, being beneficial to improving the smelting process of the blast furnace and promoting the smooth running of the blast furnace, and generally regarded by all countries in the world, but the oxygen coal gun of the existing coal powder injection device of the blast furnace is inserted into a peep, such design leads to the oxygen coal rifle to be heated by hot-blast easily and warp, seriously influences the life of oxygen coal rifle, and the oxygen coal rifle is complicated at the inside fixed knot structure of peephole passageway, dismantles inconveniently when changing the oxygen coal rifle, and hot-blast and buggy can not be abundant mix, leads to the combustion rate of buggy low, has increased manufacturing cost.

SUMMERY OF THE UTILITY MODEL

The present invention aims at solving at least one of the technical problems in the related art to a certain extent. Therefore, an object of the utility model is to provide a blast furnace jetting buggy and oxygen boosting device can prolong the contact time of oxygen coal air current and hot gas flow, avoids the oxygen coal rifle to receive the impact destruction of hot gas flow and has played structural strength, the effectual life who prolongs the oxygen gun pipe, and the oxygen coal rifle adopts the screw thread mode simultaneously, connects and fixed effect is superior to traditional mode.

The blast furnace coal powder injection and oxygen enrichment device comprises a powder bin, an injection tank, a distributor and an elbow, wherein the bottom of the powder bin is communicated with the injection tank through a connecting hose, the bottom of the injection tank is connected with a mixer through a coal valve, the output end of the mixer is connected with the inlet of the distributor through a pipeline, the outlet of the distributor is hermetically connected with a plurality of coal injection guns, the other end of each coal injection gun is hermetically connected with an oxygen coal gun, a hot air pipeline is arranged inside the elbow, a peephole channel is communicated and arranged inside the elbow close to the turning part of the hot air pipeline, internal threads are arranged on the inner wall of the peephole channel, external threads matched with the internal threads are arranged outside the oxygen coal guns, the oxygen coal guns enter the peephole channel through threaded connection, and are connected through threads, compare in traditional insert the oxygen coal rifle or fix through other structures, threaded connection is simpler, and fixed effect is better moreover, and the end of oxygen coal rifle flushes with hot-air pipes corner, avoids the oxygen coal rifle to be heated by the hot-blast stream and softens the deformation inside hot-air pipes, hot-air pipes's import department fixed mounting has the impeller, the positive direction of impeller is down, leads to the inside hot-blast stream of hot-air pipes, makes its spiral air inlet, avoids hot-blast blow directly, increases the mixing time of hot-blast stream and buggy.

Preferably, a powder bin scale is installed outside the powder bin, and a blowing tank scale is installed outside the blowing tank.

Preferably, the blender is the tee bend structure, and the buggy passageway has been seted up at the middle part, the one end sealing connection air conduit of blender, the air-powder mixing channel has been seted up to the other end, and the blender utilizes the produced relative negative pressure of its air conduit spun high velocity air stream to adsorb, mix the buggy, and the buggy after the mixture is spout from the air-powder mixing channel, the bottom of blender forms an air chamber, the upper end fixed mounting of air chamber has the boiling plate, air conduit passes through connecting pipe and air chamber intercommunication, and compressed air through the boiling plate can improve gas, powder mixture, increases the start-up function of buggy.

Preferably, the pipeline, the connecting pipe and the coal injection gun are all connected with safety valves.

Preferably, the oxygen coal gun comprises outer tube and inner tube, the inner tube cover is inside the outer tube, the space between inner tube and the outer tube forms the oxygen passageway, the nozzle has been seted up to the end of inner tube, the inner tube passes through nozzle and outer tube intercommunication, the outer wall of outer tube is connected with the oxygen pipe that is linked together with the oxygen passageway, utilizes the oxygen coal gun to the inside supplementary oxygen of buggy, is favorable to the burning of buggy.

Preferably, the center of the nozzle is provided with a center hole, the periphery of the center hole is provided with small holes, the small holes are of a spiral structure, oxygen is sprayed out from the small holes at a speed close to the speed of sound, and the oxygen is forced to rotate around the coal strand, so that the purpose of rapidly mixing and burning oxygen and coal is achieved.

The utility model discloses in, set up the impeller in hot-blast main, can lead to the hot-blast stream, avoid the inflow belly pipe of its direct-flushing formula, the wind current blows the impeller back and makes its rotation, the front of impeller changes the direction of hot-blast stream, the velocity of flow of hot-blast stream has been slowed down, also make the spiral forward movement of hot-blast stream simultaneously, carry out abundant mixture with oxygen coal gun spun oxygen coal mixed air stream, reach the mesh of fully preheating, and the oxygen coal gun only need flush with elbow corner and do not enter into hot-blast main, hot-blast thermal shock to the oxygen coal gun has been avoided, the effectual life who protects the oxygen coal gun, the oxygen coal gun passes through the threaded connection mode and fixes in the peephole passageway, the installation is convenient with the dismantlement, and the support can be stable fix inside the peephole passageway, need not to set up other structures again and fix it.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic view of the structure of a blowing tank of a pulverized coal and oxygen enrichment device for blast furnace blowing provided by the utility model;

FIG. 2 is a schematic structural view of a mixer of the pulverized coal and oxygen enrichment device for blast furnace injection provided by the present invention;

FIG. 3 is an assembly view of the oxygen-coal gun and the elbow of the pulverized coal and oxygen enrichment device for blast furnace injection provided by the utility model;

FIG. 4 is a view showing the internal structure of the oxygen-coal gun of the pulverized coal and oxygen-enriching device for blast furnace injection;

FIG. 5 is a cross-sectional view of the nozzle of the pulverized coal and oxygen enrichment device for blast furnace injection provided by the present invention;

fig. 6 is a section view of a peephole channel of the pulverized coal and oxygen enrichment device for blast furnace injection provided by the utility model.

In the figure: 1. a powder bin; 2. a powder bin scale; 3. a connecting hose; 4. a blowing tank; 5. a blowing tank scale; 6. a coal discharging valve; 7. a mixer; 71. a pulverized coal passage; 72. an air duct; 73. a connecting pipe; 74. an air chamber; 75. a gas-powder mixing channel; 8. a safety valve; 9. a pipeline; 10. a dispenser; 11. a coal injection gun; 12. bending the pipe; 13. a hot air duct; 14. an impeller; 15. a peephole channel; 16. an oxygen coal gun; 161. an outer tube; 162. an inner tube; 163. an oxygen tube; 164. a nozzle; 1641. a central bore; 1642. a small hole; 17. an orifice cover; 18. an internal thread.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Referring to fig. 1-6, the blast furnace coal powder injection and oxygen enrichment device comprises a powder bin 1, an injection tank 4, a distributor 10 and an elbow 12, wherein the bottom of the powder bin 1 is communicated with the injection tank 4 through a connecting hose 3, coal powder enters the injection tank 4 from the powder bin 1, the bottom of the injection tank 4 is connected with a mixer 7 through a lower coal valve 6, the output end of the mixer 7 is connected with the inlet of the distributor 10 through a pipeline 9, the coal powder is mixed with gas through the mixer 7 to form coal powder airflow which enters the distributor 10, the outlet of the distributor 10 is hermetically connected with a plurality of coal injection guns 11, the other ends of the coal injection guns 11 are hermetically connected with coal oxygen guns 16, a hot air pipeline 13 is arranged inside the elbow 12, a peephole passage 15 is formed in the inner part of the elbow 12 close to the turning part of the hot air pipeline 13, an internal thread 18 is arranged on the inner wall of the peephole passage 15, an external thread matched with the internal, the oxygen coal gun 16 enters the peephole channel 15 through threaded connection, the tail end of the oxygen coal gun 16 is flush with the turning part of the hot air pipeline 13, the impeller 14 is fixedly installed at the inlet of the hot air pipeline 13, the positive direction of the impeller 14 is downward, hot air flow enters the blowing impeller 14 from the hot air pipeline 13, the impeller 14 rotates to generate a centrifugal force on the heat flow, and therefore the hot air flow is pushed forwards spirally; a powder bin scale 2 is arranged outside the powder bin 1, and a blowing tank scale 5 is arranged outside the blowing tank 4; the mixer 7 is of a three-way structure, a coal powder channel 71 is formed in the middle of the mixer 7, one end of the mixer 7 is hermetically connected with an air pipeline 72, the other end of the mixer 7 is provided with an air-powder mixing channel 75, an air chamber 74 is formed at the bottom of the mixer 7, a boiling plate is fixedly mounted at the upper end of the air chamber 74, the air pipeline 72 is communicated with the air chamber 74 through a connecting pipe 73, air is firstly accumulated in the air chamber 74 to form air pressure, and the air enters the air-powder mixing channel 75 through the boiling plate to apply acting force on a; the pipeline 9, the connecting pipe 73 and the coal injection gun 11 are all connected with a safety valve 8; the oxygen coal gun 16 comprises an outer tube 161 and an inner tube 162, wherein the inner tube 162 is sleeved inside the outer tube 161, an oxygen channel is formed in the space between the inner tube 162 and the outer tube 161, a nozzle 164 is arranged at the tail end of the inner tube 162, the inner tube 162 is communicated with the outer tube 161 through the nozzle 164, an oxygen tube 163 communicated with the oxygen channel is connected to the outer wall of the outer tube 161, and oxygen enters the oxygen channel from the oxygen tube 163; the center of the nozzle 164 is provided with a center hole 1641, the periphery of the center hole 1641 is provided with small holes 1642, the small holes 1642 are of a spiral structure, oxygen enters the inner part of the outer pipe 161 from the small holes 1642, and coal powder enters the outer pipe 161 from the center hole 1641 to be mixed with the coal powder, so that oxygen enrichment of coal powder injection is realized.

When the coal powder spraying device works, coal powder enters the coal spraying tank 4 from the coal powder bin 1, the coal discharging valve 6 is opened, the coal powder enters the coal powder channel 71 of the mixer 7 through the coal discharging valve 6, the air pipe 72 sprays airflow at a high speed to enable the inner cavity of the mixer 7 to form relative negative pressure to adsorb and mix the coal powder, the mixed airflow-shaped coal powder enters the distributor 10 through the pipe 9, the distributor 10 distributes the coal powder into each coal spraying gun 11, the coal spraying guns 11 and the oxygen coal spraying guns 16 are hermetically connected and inserted into the peephole channels 15 of the elbow 12, the inner walls of the peephole channels 15 are of threaded structures, the oxygen coal spraying guns 16 are rotated to enable external threads to be matched with internal threads of the peephole channels 15, the oxygen coal spraying guns 16 are rotated to be flush with the corners of the elbow 12, oxygen enters from the oxygen pipe 163, enters the outer pipe 161 through the small holes 1642, the coal powder passing through the coal spraying gun outer pipe 11 enters the nozzles and is blown into the inner part of the central hole, oxygen and coal powder are mixed to realize oxygen enrichment, the small holes 1642 are of a spiral structure, so that the oxygen is forced to rotate around the coal strands, the oxygen and the coal are rapidly mixed, the wind direction of hot air flows through the impeller 14 is changed, spiral air is supplied to the hot air flows, the contact time of the hot air flows and oxygen-coal mixed gas can be prolonged, and the oxygen-coal mixed gas flow is fully preheated.

In conclusion, the impeller is arranged in the hot air pipeline, hot air flow can be guided, direct-flushing type air flow is prevented from flowing into the belly pipe, the air flow blows the back face of the impeller to enable the impeller to rotate, the front face of the impeller changes the direction of the hot air flow, the flow speed of the hot air flow is reduced, meanwhile, the hot air flow spirally moves forwards, and the hot air flow is fully mixed with oxygen coal mixed air flow sprayed by the oxygen coal gun, so that the purpose of fully preheating is achieved, the oxygen coal gun only needs to be flush with the corner of the elbow and does not enter the hot air pipeline, thermal shock of the hot air to the oxygen coal gun is avoided, the service life of the oxygen coal gun is effectively protected, the oxygen coal gun is fixed in the peephole channel in a threaded connection mode, the installation and the disassembly are convenient, the support can be stably fixed in the peephole channel, and other structures are not needed to fix the oxygen coal.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

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

Above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the design of the present invention, equivalent replacement or change should be covered within the protection scope of the present invention.

Claims

1. The blast furnace coal powder injection and oxygen enrichment device is characterized in that: the coal powder spraying device comprises a powder bin, a spraying tank, a distributor and an elbow, wherein the bottom of the powder bin is communicated with the spraying tank through a connecting hose, the bottom of the spraying tank is connected with a mixer through a coal valve, the output end of the mixer is connected with the inlet of the distributor through a pipeline, the outlet of the distributor is hermetically connected with a plurality of coal spraying guns, the other end of each coal spraying gun is hermetically connected with an oxygen coal gun, a hot air pipeline is arranged inside the elbow, a peephole channel is communicated and arranged inside the elbow close to the turning of the hot air pipeline, an internal thread is arranged on the inner wall of the peephole channel, an external thread matched with the internal thread is arranged outside the oxygen coal gun, the oxygen coal gun enters the peephole channel through threaded connection, the tail end of the oxygen coal gun is flush with the turning of the hot air pipeline, and an impeller is fixedly mounted at the inlet of the hot air, the positive direction of the impeller faces downwards.

2. The blast furnace pulverized coal injection and oxygen enrichment device according to claim 1, characterized in that: the powder bin is externally provided with a powder bin scale, and the blowing tank is externally provided with a blowing tank scale.

3. The blast furnace pulverized coal injection and oxygen enrichment device according to claim 1, characterized in that: the mixer is of a three-way structure, a pulverized coal channel is formed in the middle of the mixer, one end of the mixer is connected with an air pipeline in a sealing mode, an air-powder mixing channel is formed in the other end of the mixer, an air chamber is formed at the bottom of the mixer, a boiling plate is fixedly mounted at the upper end of the air chamber, and the air pipeline is communicated with the air chamber through a connecting pipe.

4. The blast furnace pulverized coal injection and oxygen enrichment device according to claim 3, characterized in that: and the pipeline, the connecting pipe and the coal injection gun are all connected with safety valves.

5. The blast furnace pulverized coal injection and oxygen enrichment device according to claim 1, characterized in that: the oxygen coal gun is composed of an outer tube and an inner tube, the inner tube is sleeved inside the outer tube, an oxygen channel is formed in the space between the inner tube and the outer tube, a nozzle is arranged at the tail end of the inner tube, the inner tube is communicated with the outer tube through the nozzle, and the outer wall of the outer tube is connected with an oxygen tube communicated with the oxygen channel.

6. The blast furnace pulverized coal injection and oxygen enrichment device according to claim 5, characterized in that: the center of the nozzle is provided with a center hole, the periphery of the center hole is provided with small holes, and the small holes are of spiral structures.