CN211497679U - Blast furnace tuyere - Google Patents
Blast furnace tuyere Download PDFInfo
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- CN211497679U CN211497679U CN201922251007.1U CN201922251007U CN211497679U CN 211497679 U CN211497679 U CN 211497679U CN 201922251007 U CN201922251007 U CN 201922251007U CN 211497679 U CN211497679 U CN 211497679U
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Abstract
The utility model provides a blast furnace tuyere, include: a tuyere body; the cooling cavity is connected with the outer side of the tuyere body, one end of the cooling cavity is provided with a water inlet, and the other end of the cooling cavity is provided with a water outlet; a front cavity water chamber, a first rear cavity water chamber, a second rear cavity water chamber, a third rear cavity water chamber, a fourth rear cavity water chamber and an air port inner cavity are sequentially arranged in the cooling cavity along the direction from the water inlet to the water outlet; the inner surfaces of the front cavity water chamber, the first rear cavity water chamber, the second rear cavity water chamber, the third rear cavity water chamber and the fourth rear cavity water chamber are threaded surfaces; therefore, the threads are arranged on the inner walls of the front cavity water chamber, the first rear cavity water chamber, the second rear cavity water chamber, the third rear cavity water chamber, the fourth rear cavity water chamber and the air port inner cavity in the cooling cavity, so that the heat exchange area of the cavity can be increased; meanwhile, the thread structure can promote the generation of enhanced cooling of the nucleation bubbles, increase bubble sources for nucleation boiling heat transfer, improve the heat exchange capability and prolong the service life of the tuyere.
Description
Technical Field
The utility model relates to a blast furnace ironmaking technical field especially relates to a blast furnace wind gap.
Background
The tuyere is a key device for feeding hot air with a certain temperature into the blast furnace, and the length of the service cycle of the tuyere directly influences the continuous operation, the forward running condition, the damping down rate and the yield level of the blast furnace.
Generally, the front end of the tuyere is in a temperature environment of about 2000 ℃ to 2300 ℃, and abrasion of coke particles and molten iron slag occurs; the flow velocity of hot air is 230 m/s-280 m/s inside the tuyere, and the tuyere is wrapped with coal dust particles with different quantities; the tuyere exterior is subject to the hazards of erosion of an indefinite amount of iron slag.
Along with the increase of the furnace volume of the blast furnace, the increase of the coal injection amount can cause excessive or unstable high-temperature iron slag to drop to the front end and the upper side surface of the tuyere, so that the heat of the tuyere is increased sharply, and if cooling water in the tuyere can not take away the heat in time, the tuyere can be damaged.
SUMMERY OF THE UTILITY MODEL
Problem to prior art existence, the embodiment of the utility model provides a blast furnace wind gap for when the wind gap heat sharply increases among the solution prior art, the intraoral cooling water of wind gap can not in time take away the heat, leads to the technical problem that the wind gap is bad.
The embodiment of the utility model provides a blast furnace wind gap, the wind gap includes:
a tuyere body;
the cooling cavity is connected with the outer side of the tuyere body, one end of the cooling cavity is provided with a water inlet, and the other end of the cooling cavity is provided with a water outlet;
a front cavity water chamber, a first rear cavity water chamber, a second rear cavity water chamber, a third rear cavity water chamber, a fourth rear cavity water chamber and an air port inner cavity are sequentially arranged in the cooling cavity along the direction from the water inlet to the water outlet; wherein the content of the first and second substances,
the inner surfaces of the front cavity water chamber, the first rear cavity water chamber, the second rear cavity water chamber, the third rear cavity water chamber and the fourth rear cavity water chamber are threaded surfaces.
In the scheme, the spiral angle of the thread surface is 5-85 degrees.
In the above aspect, the thread surface includes: any one of a triangular thread surface, a trapezoidal thread surface, a zigzag thread surface, a square thread surface and a circular arc thread surface.
In the scheme, the thread pitch of the thread surface is 0-60 mm.
In the above aspect, the thread direction of the thread surface includes: clockwise threads or counterclockwise threads.
In the above scheme, the cooling cavity is connected with the tuyere body through welding.
In the above scheme, the tuyere body and the cooling cavity are steel structures.
The utility model provides a blast furnace tuyere, the tuyere includes: a tuyere body; the cooling cavity is connected with the outer side of the tuyere body, one end of the cooling cavity is provided with a water inlet, and the other end of the cooling cavity is provided with a water outlet; a front cavity water chamber, a first rear cavity water chamber, a second rear cavity water chamber, a third rear cavity water chamber, a fourth rear cavity water chamber and an air port inner cavity are sequentially arranged in the cooling cavity along the direction from the water inlet to the water outlet; the inner surfaces of the front cavity water chamber, the first rear cavity water chamber, the second rear cavity water chamber, the third rear cavity water chamber and the fourth rear cavity water chamber are threaded surfaces; therefore, the threads are arranged on the inner walls of the front cavity water chamber, the first rear cavity water chamber, the second rear cavity water chamber, the third rear cavity water chamber, the fourth rear cavity water chamber and the air port inner cavity in the cooling cavity, so that the heat exchange area of the cavity can be increased; meanwhile, the thread structure can promote the generation of enhanced cooling of the nucleation bubbles, increase the nucleation bubbles and further increase bubble sources for nucleation boiling heat transfer, thereby improving the heat exchange capability and prolonging the service life of the tuyere.
Drawings
FIG. 1 is a schematic view of the overall structure of a tuyere of a blast furnace according to an embodiment of the present invention;
fig. 2 is a schematic view of an internal thread structure of a cavity at the front end of an air port provided by the embodiment of the present invention;
fig. 3 is a trapezoidal internal thread structure provided in an embodiment of the present invention;
fig. 4 is a rectangular internal thread structure provided in an embodiment of the present invention;
fig. 5 is a triangular internal thread structure provided by an embodiment of the present invention.
Detailed Description
The technical problem that in the prior art, when the heat of the air port is suddenly and sharply increased, cooling water in the air port cannot timely take away the heat, so that the air port is damaged is solved. The utility model provides a blast furnace tuyere, the tuyere includes: a tuyere body; the cooling cavity is connected with the outer side of the tuyere body, one end of the cooling cavity is provided with a water inlet, and the other end of the cooling cavity is provided with a water outlet; a front cavity water chamber, a first rear cavity water chamber, a second rear cavity water chamber, a third rear cavity water chamber, a fourth rear cavity water chamber and an air port inner cavity are sequentially arranged in the cooling cavity along the direction from the water inlet to the water outlet; the inner surfaces of the front cavity water chamber, the first rear cavity water chamber, the second rear cavity water chamber, the third rear cavity water chamber and the fourth rear cavity water chamber are threaded surfaces.
The technical solution of the present invention is further described in detail with reference to the accompanying drawings and specific embodiments.
Example one
This embodiment provides a blast furnace tuyere, which is mainly used to send hot air and pulverized coal into a furnace, and the arrow in fig. 1
The direction of the hot air and the coal dust. With continued reference to fig. 1, the tuyere includes: a front cavity water chamber 21, a first rear cavity water chamber 22, a second rear cavity water chamber 23, a third rear cavity water chamber 24, a fourth rear cavity water chamber 25 and a tuyere inner cavity 26 are arranged in the tuyere body 1, the cooling cavity 2 and the cooling cavity 2; wherein the content of the first and second substances,
the cooling cavity 2 is connected with the outer side of the tuyere body 1, a water inlet 3 is formed in one end of the cooling cavity 2, and a water outlet 4 is formed in the other end of the cooling cavity.
A front cavity water chamber 21, a first rear cavity water chamber 22, a second rear cavity water chamber 23, a third rear cavity water chamber 24, a fourth rear cavity water chamber 25 and a tuyere inner cavity 26 are sequentially arranged in the cooling cavity 2 along the direction from the water inlet 3 to the water outlet 4; wherein, the inner surfaces of the front cavity water chamber 21, the first rear cavity water chamber 22, the second rear cavity water chamber 23, the third rear cavity water chamber 24, the fourth rear cavity water chamber 25 and the tuyere inner cavity 26 are threaded surfaces. In actual operation, cooling water enters from the water inlet 3 under a certain pressure, passes through the front cavity water chamber 21, the first rear cavity water chamber 22, the second rear cavity water chamber 23, the third rear cavity water chamber 24, the fourth rear cavity water chamber 25 and the tuyere inner cavity 26, and then flows out from the water outlet 4. Here, the front end and the outside of the front chamber water chamber 21 are exposed to high temperature, and the outside of the first rear chamber water chamber 22, the second rear chamber water chamber 23, the third rear chamber water chamber 24, the fourth rear chamber water chamber 25, and the tuyere inner chamber 26 are exposed to high temperature.
The thread direction of the thread surface can be clockwise or anticlockwise. The thread flanks may include: any one of the triangular thread surface, the trapezoidal thread surface, the zigzag thread surface, the square thread surface, and the circular arc thread surface is not limited herein.
The threads are arranged in the inner wall of each cavity in the cooling cavity, so that the heat exchange area of the cavity can be increased; meanwhile, the thread structure can promote the generation of the nuclear bubble to strengthen cooling, increase the nuclear bubble and further increase the bubble source of the nuclear boiling heat transfer, thereby improving the heat exchange capacity and realizing the self-protection of the strength of the tuyere body.
In order to avoid film boiling caused by accumulation of nuclear bubbles, increase of thermal resistance, erosion failure of the tuyere and damage of the tuyere, in the embodiment, the pitch of the threads of the thread surface is set to be 0-60 mm, and the spiral angle of the thread surface is set to be 5-85 degrees; the thread pitch and the thread angle can be adjusted according to the actual running condition, so that the phenomenon of film boiling caused by the accumulation of the nuclear bubble is avoided.
In order to enhance the strength of the tuyere, the tuyere body 1 and the cooling cavity 2 are steel structures in this embodiment.
In practical application, the inner surfaces of the front cavity water chamber 21, the first rear cavity water chamber 22, the second rear cavity water chamber 23, the third rear cavity water chamber 24, the fourth rear cavity water chamber 25 and the tuyere inner cavity 26 are polished, and then the inner surface is machined to form threads of any one of the structures, wherein the angle of the threads is 5-85 degrees; the pitch of the threads is set to be 0-60 mm; and finally, after cleaning internal scraps, welding the cooling cavity 2 on the tuyere body 1.
Taking front chamber water chamber 21 as an example, the thread structure in front chamber water chamber 21 is shown in fig. 2. The thread structure may be a body-type female thread as shown in fig. 3, a rectangular female thread as shown in fig. 4, or a triangular female thread as shown in fig. 5.
The embodiment of the utility model provides a beneficial effect that blast furnace tuyere can bring is at least:
the utility model provides a blast furnace tuyere, the tuyere includes: a tuyere body; the cooling cavity is connected with the outer side of the tuyere body, one end of the cooling cavity is provided with a water inlet, and the other end of the cooling cavity is provided with a water outlet; a front cavity water chamber, a first rear cavity water chamber, a second rear cavity water chamber, a third rear cavity water chamber, a fourth rear cavity water chamber and an air port inner cavity are sequentially arranged in the cooling cavity along the direction from the water inlet to the water outlet; the inner surfaces of the front cavity water chamber, the first rear cavity water chamber, the second rear cavity water chamber, the third rear cavity water chamber and the fourth rear cavity water chamber are threaded surfaces; therefore, the threads are arranged on the inner walls of the front cavity water chamber, the first rear cavity water chamber, the second rear cavity water chamber, the third rear cavity water chamber, the fourth rear cavity water chamber and the air port inner cavity in the cooling cavity, so that the heat exchange area of the cavity can be increased; meanwhile, the thread structure can promote the generation of enhanced cooling of the nucleation bubbles, increase the nucleation bubbles and further increase bubble sources for nucleation boiling heat transfer, thereby improving the heat exchange capability and prolonging the service life of the tuyere; and the damage to the tuyere due to film boiling caused by the accumulation of the nuclear bubble can be avoided by adjusting the pitch and the angle of the threads.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, and any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (7)
1. A blast furnace tuyere, characterized in that the tuyere comprises:
a tuyere body;
the cooling cavity is connected with the outer side of the tuyere body, one end of the cooling cavity is provided with a water inlet, and the other end of the cooling cavity is provided with a water outlet;
a front cavity water chamber, a first rear cavity water chamber, a second rear cavity water chamber, a third rear cavity water chamber, a fourth rear cavity water chamber and an air port inner cavity are sequentially arranged in the cooling cavity along the direction from the water inlet to the water outlet; wherein the content of the first and second substances,
the inner surfaces of the front cavity water chamber, the first rear cavity water chamber, the second rear cavity water chamber, the third rear cavity water chamber and the fourth rear cavity water chamber are threaded surfaces.
2. The tuyere of claim 1, wherein a spiral angle of the thread surface is 5 to 85 degrees.
3. The tuyere of claim 1, wherein the thread surface comprises: any one of a triangular thread surface, a trapezoidal thread surface, a zigzag thread surface, a square thread surface and a circular arc thread surface.
4. The tuyere of claim 1, wherein a pitch of the thread surface is 0 to 60 mm.
5. The tuyere of claim 1, wherein a thread direction of the thread surface comprises: clockwise threads or counterclockwise threads.
6. The tuyere of claim 1, wherein the cooling cavity is connected to the tuyere body by welding.
7. The tuyere of claim 1, wherein the tuyere body and the cooling cavity are of a steel structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922251007.1U CN211497679U (en) | 2019-12-16 | 2019-12-16 | Blast furnace tuyere |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922251007.1U CN211497679U (en) | 2019-12-16 | 2019-12-16 | Blast furnace tuyere |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211497679U true CN211497679U (en) | 2020-09-15 |
Family
ID=72416219
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922251007.1U Active CN211497679U (en) | 2019-12-16 | 2019-12-16 | Blast furnace tuyere |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211497679U (en) |
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2019
- 2019-12-16 CN CN201922251007.1U patent/CN211497679U/en active Active
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