CN217465380U - Coal injection device for side-blown furnace - Google Patents
Coal injection device for side-blown furnace Download PDFInfo
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- CN217465380U CN217465380U CN202220774804.7U CN202220774804U CN217465380U CN 217465380 U CN217465380 U CN 217465380U CN 202220774804 U CN202220774804 U CN 202220774804U CN 217465380 U CN217465380 U CN 217465380U
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Abstract
The utility model relates to a coal injection device for a side-blown furnace, belonging to the technical field of smelting coal injection; the coal injection device for the side-blown converter comprises a short pipe joint, an air nozzle, a secondary short pipe joint, an air-coal mixing pipe and an end cover, wherein the short pipe joint is arranged on the outer side of a water jacket of the side-blown converter, the air nozzle is arranged on the short pipe joint and penetrates through the short pipe joint to extend into the side-blown converter, one end of the secondary short pipe joint is connected with the air nozzle, the other end of the secondary short pipe joint is connected with the air-coal mixing pipe, the tail end of the air-coal mixing pipe is provided with the detachable end cover, and the inner walls of the air nozzle, the secondary short pipe joint and the air-coal mixing pipe are plated with wear-resistant ceramic layers for reducing pipeline wear; the utility model discloses an installation detachable tuyere on the nipple of nipple to plated wear-resisting ceramic layer in tuyere, secondary nipple of nipple and wind coal hybrid tube and in order to alleviate pipeline wear, the tuyere of change can be dismantled in the installation on the nipple of nipple, can need not to change the connecting piece of coal injection device and side-blown converter, in order to prolong pipeline life.
Description
Technical Field
The utility model relates to a coal injection device for side-blown converter belongs to smelting coal injection technical field.
Background
When the side-blown reduction furnace is used for smelting lead, top-blown oxidation smelting is firstly carried out: mixing lead concentrate and stone powder, putting into a reduction furnace, introducing oxygen at the bottom of the reduction furnace through an oxygen lance, carrying out melting reaction to form crude lead, high-lead slag with low melting point and sulfur dioxide flue gas, and discharging the crude lead through a lead discharge port; and then carrying out reduction smelting on the high lead slag with low melting point: and after the crude lead is discharged, introducing an air-coal mixture into the bottom of the reduction furnace, and performing reduction reaction to form crude lead and slag of the reduction furnace, wherein the slag of the reduction furnace is directly introduced into a fuming furnace in a molten state. Lead slag generated in the side-blown reduction furnace is introduced into a fuming furnace for smelting treatment, and the air-coal mixture is also required to be blown into the fuming furnace, and pulverized coal is used as a reducing agent and a combustion improver.
However, in the process of smelting high-pressure blast coal injection in the fuming furnace, the coal injection pipeline is seriously abraded due to high-speed washing of pulverized coal particle flow, and particularly, the coal injection pipeline is easily damaged and leaked due to the coal injection mixing box at the joint of the coal injection pipeline and the side-blown fuming furnace, so that the coal injection pipeline has short service life, needs frequent furnace shutdown and replacement of weld repair, and frequently welds and repairs the coal injection pipeline, thereby causing construction period delay on one hand; on the other hand, after the connecting piece at the connecting part of the coal injection pipeline and the water jacket of the side-blown fuming furnace is frequently loosened and tightened, the problems of slipping and reduction of sealing performance are easy to occur, the tuyere coal injection device cannot be installed again subsequently, the water jacket is turned into threads again, and great waste of production time and materials is caused.
SUMMERY OF THE UTILITY MODEL
In order to overcome the problem that exists among the background art, the utility model provides a coal injection device for side-blown furnace, through at the short coupling of side-blown furnace water jacket outside fixed mounting, install the tuyere that is equipped with wear-resisting ceramic layer inside on the short coupling and pass in the short coupling extends to the side-blown furnace, can alleviate wearing and tearing through setting up wear-resisting ceramic layer, can dismantle the tuyere of change through the installation on the short coupling, can need not to change the connecting piece of coal injection device and side-blown furnace, with the bolt hole on the protection water jacket, the life of coal injection device has been prolonged, the part change frequency has been reduced, be convenient for later maintenance, production efficiency has been improved, be connected through the secondary short coupling between tuyere and the wind coal hybrid tube, through at wind coal hybrid tube end-to-end installation detachable end cover, so that the clearance blocks up buggy or the sediment in the pipe.
In order to solve the above problem, the utility model discloses a following technical scheme realizes:
the coal injection device for the side-blown converter comprises a short pipe joint, an air nozzle, a secondary short pipe joint, an air-coal mixing pipe and an end cover, wherein the short pipe joint is arranged outside a water jacket of the side-blown converter, the air nozzle is arranged on the short pipe joint and penetrates through the short pipe joint to extend into the side-blown converter, one end of the secondary short pipe joint is connected with the air nozzle, the other end of the secondary short pipe joint is connected with the air-coal mixing pipe, the detachable end cover is arranged at the tail end of the air-coal mixing pipe, and a wear-resistant ceramic layer used for reducing the abrasion of a pipeline is plated on the inner wall of the air nozzle, the secondary short pipe joint and the air-coal mixing pipe.
Preferably, the short pipe joint, the air nozzle, the secondary short pipe joint and the air-coal mixing pipe are detachably connected through flanges in sequence.
Preferably, the air-coal mixing pipe comprises a main pipe, a coal pipe and an air pipe, the coal pipe is vertically arranged above the main pipe, and the air pipe is obliquely arranged above the main pipe and positioned on the right side of the coal pipe.
Preferably, the tail end of the air-coal mixing pipe is provided with a conical external thread, and a cylindrical internal thread meshed with the conical external thread is arranged inside the end cover.
The utility model has the advantages that:
the utility model discloses an at the short coupling of side-blown furnace water jacket outside fixed mounting, install the tuyere that inside was equipped with wear-resisting ceramic layer on the short coupling and pass the short coupling and extend to in the side-blown furnace, can alleviate wearing and tearing through setting up wear-resisting ceramic layer, can dismantle the tuyere of change through the installation on the short coupling, can need not to change coal injection device and side-blown furnace's connecting piece, bolt hole on the protection water jacket, the life of coal injection device has been prolonged, the part change frequency has been reduced, be convenient for later maintenance, production efficiency has been improved, be connected through the short coupling of secondary between tuyere and the wind coal hybrid tube, through installing the detachable end cover at wind coal hybrid tube end, so that the clearance blocks up buggy or the sediment in the pipe.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic perspective view of the present invention;
FIG. 3 is a schematic structural view of the nipple of the present invention;
FIG. 4 is a schematic view of the tuyere structure of the present invention;
FIG. 5 is a schematic structural view of the secondary nipple of the present invention;
FIG. 6 is a schematic view of the structure of the air-coal mixing pipe of the present invention;
fig. 7 is a schematic view of the end cap structure of the present invention.
Description of reference numerals: 1-short pipe joint, 2-blast nozzle, 3-secondary short pipe joint, 4-air-coal mixing pipe, 5-end cover, 6-wear-resistant ceramic layer, 7-flange, 8-main pipe, 9-coal pipe and 10-air pipe.
Detailed Description
In order to make the objects, technical solutions, objectives and effects of the present invention obvious and understandable, preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the skilled person can understand the preferred embodiments.
It should be noted that, in the description of the present invention, unless explicitly specified or limited, the terms "mounted," "connected," and "connected" should be broadly interpreted, i.e., they may be fixedly connected or detachably connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate.
The utility model discloses in, as shown in fig. 1-7, coal injection device for side-blown converter includes nipple 1, tuyere 2, secondary nipple 3, wind coal hybrid tube 4, end cover 5, nipple 1 installs in the side-blown converter water jacket outside, and tuyere 2 installs on nipple 1 and passes nipple 1 and extend to in the side-blown converter, secondary nipple 3 one end is connected with tuyere 2, and the other end is connected with wind coal hybrid tube 4, and detachable end cover 5 is installed to the end of wind coal hybrid tube 4, tuyere 2, secondary nipple 3, the inner wall of wind coal hybrid tube 4 have plated the wear-resisting ceramic layer 6 that is used for reducing the pipeline wearing and tearing. The method changes the prior mode that the coal injection device is directly connected with the water jacket of the side-blown reduction furnace or the fuming furnace, the short pipe joint 1 is fixedly arranged at the outer side of the water jacket of the side-blown furnace, the air nozzle 2 for leading in coal powder is arranged at the outer end of the short pipe joint 1 through a flange, and the air nozzle 2 penetrates through the inside of the short pipe joint 1 and extends into the side-blown furnace, because the coal injection pipeline is seriously abraded due to high-speed washing of coal powder particle flow in the coal injection process, and the high-temperature environment at the joint of the coal injection pipeline and the side-blown reduction furnace or the fuming furnace easily causes the damage of the coal injection pipeline, the damaged pipeline must be replaced in time for ensuring the production order and the production quality, therefore, when the coal injection pipeline needs to be replaced after being used for a long time, the components such as the air nozzle 2 at the right end of the short pipe joint 1, the secondary short pipe joint 3, the air-coal mixing pipe 4 and the like are directly disassembled and replaced without replacing the connecting piece of the coal injection device and the side-blown furnace, the problems that after the connecting piece at the connecting part of the coal injection pipeline and the side-blowing reduction furnace or the fuming furnace is frequently loosened and tightened, the coal injection pipeline is easy to slip and the sealing performance is reduced are solved, the service life of the coal injection device is effectively prolonged, the part replacement frequency is reduced, meanwhile, the later maintenance is facilitated, and the production efficiency is improved; the tail end of the air-coal mixing pipe 4 is provided with a detachable end cover 5 which is used for sealing the air-coal mixing pipe 4 on one hand, and on the other hand, when coal dust accumulation and blockage occur in the pipeline, the end cover 5 can be detached for dredging; because the inner wall of the coal injection pipeline is seriously abraded due to high-speed washing of pulverized coal particle flow in the coal injection process, the inner walls of the pipelines directly contacting pulverized coal such as the air nozzle 2, the secondary short pipe joint 3, the air-coal mixing pipe 4 and the like are plated with the wear-resistant ceramic layer 6 for reducing the abrasion of the pipeline, the ceramic plating layer is flat and uniform and has no air holes or cracks, in the specific application, the thickness of the wear-resistant ceramic layer 6 can be selected according to the conditions of coal injection quantity, coal injection speed, pulverized coal particle size and the like, in the embodiment, the thickness of the wear-resistant ceramic layer 6 is 9-10mm, the service life of the coal injection pipeline is effectively prolonged, and the replacement frequency is reduced.
In the utility model, as shown in fig. 1-6, the short pipe joint 1, the tuyere 2, the secondary short pipe joint 3 and the air-coal mixing pipe 4 are connected in a detachable way through the flange 7. Short coupling 1 fixed mounting is at the outer wall of side blown converter, tuyere 2 is installed on short coupling 1 through flange 7, be connected through secondary short coupling 3 between tuyere 2 and the wind coal hybrid tube 4, flange 7 is passed through respectively at the both ends of secondary short coupling 3 and is connected with tuyere 2 and wind coal hybrid tube 4, connect secondary short coupling 3 between tuyere 2 and wind coal hybrid tube 4, the mobile length after the buggy has got into from wind coal hybrid tube 4 has been prolonged, be convenient for improve the stability that the buggy flows, the dismantlement of the pipeline of being convenient for simultaneously is changed. The pipelines are connected through the flanges 7, so that the pipelines are convenient to detach and replace while the sealing performance of pipeline connection is ensured.
The utility model discloses in, as shown in fig. 6, wind coal hybrid tube 4 includes house steward 8, coal pipe 9, tuber pipe 10, coal pipe 9 is installed perpendicularly in house steward 8 top, and the slope of tuber pipe 10 is installed and is located the position on coal pipe 9 right side above house steward 8. Air coal hybrid tube 4 is by house steward 8, coal pipe 9, tuber pipe 10 is constituteed, wherein coal pipe 9 is installed perpendicularly in house steward 8 top, tuber pipe 10 slope is installed and is located the position on coal pipe 9 right side in house steward 8 top, the buggy flows and gets into house steward 8 from coal pipe 9, the air flow gets into house steward 8 from tuber pipe 10, install tuber pipe 10 in the coal pipe 9 outside, the buggy is behind entering house steward 8, the air flow can be abundant with the buggy, send into the stove steadily, it piles up to reduce the buggy to take place in the pipeline.
In the present invention, as shown in fig. 6-7, the end of the wind-coal mixing pipe 4 is provided with a conical external thread, and the end cover 5 is provided with a cylindrical internal thread engaged with the conical external thread. When the pipeline is piled up and blocked by the pulverized coal, in order to quickly and effectively clean the piled up and blocked pulverized coal, the end cover 5 is arranged at the tail end of the mixing pipe 4, and in the embodiment, the end cover 5 is connected with the air-coal mixing pipe 4 in a threaded connection mode. Establish circular cone external screw thread at the end of wind coal hybrid tube 4, establish the cylinder internal thread that meshes mutually with circular cone external screw thread in end cover 5 inside, wherein, 55 sealed pipe screw threads are selected for use to the screw thread system, and thread form angle alpha =55, processes according to GB/T730.1-2000 cylinder internal thread and circular cone external screw thread standard, and the cylinder internal thread code is Rp3, and circular cone external screw thread code is R 1 3。
The utility model discloses a working process:
the short pipe joint 1 is fixedly arranged on the outer side of a water jacket of a side-blown reduction furnace or a fuming furnace, and the air nozzle 2 is arranged on the short pipe joint 1 and penetrates through the short pipe joint 1 to extend into the side-blown furnace, so that the replacement frequency of a connecting piece between a coal injection pipeline and the side-blown furnace is reduced, and the connection stability and the connection tightness of the pipeline and the side-blown furnace are ensured; one end of the secondary short pipe joint 3 is connected with the tuyere 2, the other end of the secondary short pipe joint is connected with the air-coal mixing pipe 4, and all pipelines are connected through flanges 7, so that the disassembly and the replacement of all pipelines are facilitated while the connection sealing performance is ensured; the tail end of the air-coal mixing pipe 4 is provided with a detachable end cover 5, and when coal dust accumulation and blockage occur in the pipeline, the end cover 5 can be detached for dredging; the inner walls of the air nozzle 2, the secondary short pipe joint 3 and the air-coal mixing pipe 4 are plated with wear-resistant ceramic layers 6 for reducing the abrasion of the pipeline, so that the abrasion of the inner wall of the pipeline is reduced, and the service life of the pipeline is prolonged. When coal injection operation is carried out, coal dust flows enter the main pipe 8 from the coal pipe 9, air flows enter the main pipe 8 from the air pipe 10, the air pipe 10 is installed on the outer side of the coal pipe 9, and after the coal dust enters the main pipe 8, the air flows fully and stably send the coal dust into the furnace, so that the accumulation of the coal dust in the pipeline is reduced.
The utility model discloses an at the short coupling of side-blown converter water jacket outside fixed mounting, install the tuyere that inside is equipped with wear-resisting ceramic layer on the short coupling and pass the short coupling and extend to in the side-blown converter, can alleviate wearing and tearing through setting up wear-resisting ceramic layer, can dismantle the tuyere of change through the installation on the short coupling, can need not to change the connecting piece of coal injection device and side-blown converter, bolt hole on the protection water jacket, the life of coal injection device has been prolonged, the part change frequency has been reduced, be convenient for later maintenance, production efficiency has been improved, be connected through the short coupling of secondary between tuyere and the wind coal hybrid tube, through installing the detachable end cover at wind coal hybrid tube end, so that the clearance blocks up buggy or the sediment in the pipe.
Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (4)
1. A coal injection device for a side-blown converter is characterized in that: the coal injection device for the side-blown converter comprises a short pipe joint (1), a tuyere (2), a secondary short pipe joint (3), a wind-coal mixing pipe (4) and an end cover (5), wherein the short pipe joint (1) is installed on the outer side of a water jacket of the side-blown converter, the tuyere (2) is installed on the short pipe joint (1) and penetrates through the short pipe joint (1) to extend into the side-blown converter, one end of the secondary short pipe joint (3) is connected with the tuyere (2), the other end of the secondary short pipe joint is connected with the wind-coal mixing pipe (4), the detachable end cover (5) is installed at the tail end of the wind-coal mixing pipe (4), and a wear-resistant ceramic layer (6) for reducing pipeline wear is plated on the inner walls of the tuyere (2), the secondary short pipe joint (3) and the wind-coal mixing pipe (4).
2. The coal injection device for the side-blown converter according to claim 1, wherein: the short pipe joint (1), the air nozzle (2), the secondary short pipe joint (3) and the air-coal mixing pipe (4) are detachably connected through the flange (7) in sequence.
3. The coal injection device for the side-blown converter according to claim 1, wherein: the air-coal mixing pipe (4) comprises a main pipe (8), coal pipes (9) and air pipes (10), wherein the coal pipes (9) are vertically arranged above the main pipe (8), and the air pipes (10) are obliquely arranged above the main pipe (8) and positioned on the right side of the coal pipes (9).
4. The coal injection device for the side-blown converter according to claim 3, wherein: the tail end of the air-coal mixing pipe (4) is provided with a conical external thread, and a cylindrical internal thread meshed with the conical external thread is arranged inside the end cover (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220774804.7U CN217465380U (en) | 2022-04-06 | 2022-04-06 | Coal injection device for side-blown furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220774804.7U CN217465380U (en) | 2022-04-06 | 2022-04-06 | Coal injection device for side-blown furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217465380U true CN217465380U (en) | 2022-09-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220774804.7U Active CN217465380U (en) | 2022-04-06 | 2022-04-06 | Coal injection device for side-blown furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217465380U (en) |
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2022
- 2022-04-06 CN CN202220774804.7U patent/CN217465380U/en active Active
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