CN217997233U - Hot-blast pipe and hot air system - Google Patents
Hot-blast pipe and hot air system Download PDFInfo
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- CN217997233U CN217997233U CN202221899402.6U CN202221899402U CN217997233U CN 217997233 U CN217997233 U CN 217997233U CN 202221899402 U CN202221899402 U CN 202221899402U CN 217997233 U CN217997233 U CN 217997233U
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Abstract
The invention discloses a hot air pipe which comprises a working layer, a supporting layer and a cooling pipeline, wherein the working layer is enclosed into a hot air channel for hot air to pass through; the supporting layer is sleeved on the periphery of the working layer; the cooling pipeline is arranged between the working layer and the supporting layer and is provided with an inlet for the cooling medium to enter and an outlet for the cooling medium to discharge. The utility model provides a hot-blast main can take away the heat of hot-blast main to the protection hot-blast main avoids the casualty accident that the hot-blast main harm caused.
Description
Technical Field
The invention belongs to the technical field of blast furnace hot blast stoves, and particularly relates to a hot blast pipe and a hot blast system.
Background
The hot blast stove can provide the hot air required by smelting for the blast furnace, and the hot air temperature at the outlet of the hot blast stove is far higher than the hot air temperature entering the tuyere of the blast furnace, so that cold air needs to be fed into the hot air generated at the outlet of the hot blast stove to achieve the aim of providing the hot air with stable temperature for the blast furnace, namely, the hot air and the cold air are mixed to adjust the hot air to the target temperature.
At present, the air mixing arrangement on the hot air pipeline of the hot air furnace system comprises the following steps: arranging a mixed air furnace; a hot air outlet pipeline of the hot blast stove is provided with a tee joint; the air mixing port adopts a multi-strand trickle injection mode to mix air. Because the outlet pipeline of the hot blast stove bears high wind temperature in a local area before wind mixing, the pipeline is often burnt and damaged, and even cracks to cause serious casualty accidents.
Disclosure of Invention
In order to solve the technical problems, the invention provides a hot air pipe and a hot air system, which can take away heat of the hot air pipe, thereby protecting the hot air pipe and avoiding casualty accidents caused by damage of overhigh temperature of the hot air pipe.
The technical scheme of the invention is as follows:
in one aspect, the present invention provides a hot blast duct, comprising:
the working layer is enclosed into a hot air channel for hot air to pass through, one end of the hot air pipeline is used for being communicated with an outlet of the hot air furnace, and the other end of the hot air pipeline is used for being communicated with an air inlet of the blast furnace;
the supporting layer is sleeved on the periphery of the working layer;
and the cooling pipeline is arranged between the working layer and the supporting layer and is provided with an inlet for cooling medium to enter and an outlet for the cooling medium to discharge.
Furthermore, the cooling pipeline is spirally arranged by taking the axial direction of the working layer as a center; or a plurality of cooling pipelines are arranged and are parallel to the axial direction of the working layer at intervals.
Further, the inlet and the outlet of the cooling pipeline extend out of the support layer.
Further, the hot blast pipe comprises:
an outlet section;
the mixing section, the pipe shaft of mixing section is used for with the cold wind pipe intercommunication, the mixing section with the export section communicates along hot-blast traffic direction in proper order, the internal diameter of mixing section is greater than the internal diameter of export section.
In a second aspect, the present invention provides a hot air system, comprising:
a plurality of hot blast stoves;
the hot air pipe is arranged corresponding to the hot air furnace, one end of a hot air channel of the hot air pipe is communicated with the corresponding outlet of the hot air furnace, and the other end of the hot air channel is communicated with an air inlet of the blast furnace.
Further, the hot air system further comprises:
the cold air pipe corresponds the setting with the hot-blast main, cold air pipe one end is used for letting in cold wind, and the other end with correspond the pipe shaft of hot-blast main is connected, so that the cold air pipe with correspond the hot-blast channel intercommunication of hot-blast main.
Further, the hot air system further comprises:
and the cold air regulating valve is arranged on the pipe body of each cold air pipe.
Further, the hot air system further comprises:
and the cold air cut-off valve is arranged on each cold air pipe body.
Further, the hot air system further comprises:
the other end of the hot air channel of each hot air pipe is communicated with the pipe body of the hot air main pipe, and the outlet of the hot air main pipe is communicated with the air inlet of the blast furnace.
Further, the hot air system further comprises:
and the pipe body of each hot air pipe is provided with the hot air regulating valve.
The beneficial effects of the invention at least comprise:
the invention provides a hot air pipe which comprises a working layer, a supporting layer and a cooling pipeline, wherein the working layer is enclosed into a hot air channel for hot air to pass through; the supporting layer is sleeved on the periphery of the working layer; the cooling pipeline is arranged between the working layer and the supporting layer and is provided with an inlet for cooling medium to enter and an outlet for cooling medium to discharge. The working layer is used for the hot-blast direct contact with in the hot air duct, and consequently it can adopt resistant firebrick to build by laying bricks or stones and form, and the supporting layer can be made for steel material, lets in coolant in the cooling tube, for example cooling water for take away the heat of hot-blast main, thereby protection hot-blast main avoids the casualty accident that the hot-blast main harm caused.
Drawings
Fig. 1 is a schematic structural view of a hot blast pipe according to the present embodiment.
Fig. 2 is a cross-sectional view of fig. 1.
Fig. 3 is a schematic structural diagram of a hot air system according to this embodiment.
Description of reference numerals: 1-hot air pipe, 11-working layer, 12-supporting layer, 13-cooling pipeline, 14-outlet section and 15-mixing section; 2-hot blast stove, 3-cold blast pipe, 4-cold blast regulating valve, 5-cold blast cut-off valve, 6-hot blast main pipe and 7-hot blast regulating valve.
Detailed Description
In order to make the present application more clearly understood by those skilled in the art to which the present application pertains, the following detailed description of the present application is made with reference to the accompanying drawings by way of specific embodiments.
The hot air temperature at the outlet of the hot blast stove is as high as 1400 ℃, so a hot air pipeline communicated with the outlet of the hot blast stove needs to bear high-temperature erosion.
Fig. 1 and 2 show the structure of a hot blast pipe, and in conjunction with fig. 1 and 2, the present embodiment provides a hot blast pipe, where the hot blast pipe 1 includes a working layer 11, a supporting layer 12 and a cooling pipe 13, where the working layer 11 is enclosed into a hot blast channel for hot blast to pass through, one end of the hot blast pipe 1 is used for communicating with an outlet of the hot blast stove 2, and the other end is used for communicating with an air inlet of the blast furnace; the supporting layer 12 is sleeved on the periphery of the working layer 11; the cooling duct 13 is provided between the working layer 11 and the supporting layer 12, and is provided with an inlet for the cooling medium to enter and an outlet for the cooling medium to exit.
The working layer 11 is used for directly contacting with hot air in the hot air channel, so that the working layer can be formed by laying refractory bricks, the supporting layer 12 can be made of steel materials, and cooling media, such as cooling water, are introduced into the cooling pipeline 13 and are used for taking away heat of the hot air pipe 1, so that the hot air pipe 1 is protected, and casualty accidents caused by overhigh temperature damage of the hot air pipe 1 are avoided.
Preferably, in the present embodiment, the cooling pipe 13 is spirally disposed with the axial direction of the working layer 11 as the center to uniformly cool the axial direction of the hot air duct 1, the distance between two adjacent spirals of the cooling pipe 13 can be set and adjusted according to the cooling requirement, the smaller the distance between two adjacent spirals is, the better the cooling effect is, but the cost is increased; in other embodiments, there may be a plurality of cooling pipes 13, and the plurality of cooling pipes 13 are arranged in parallel to the axial direction of the working layer 11 at intervals, that is, the cooling pipes 13 are distributed in the circumferential direction of the working layer 11, so as to achieve uniform cooling of different parts of the hot air pipe 1; in this embodiment, the number of the cooling pipes 13 may be set to 8 or 10, and is not particularly limited. The cooling pipe 13 may be made of metal, and the inner wall of the supporting layer 12 may be provided with a bracket or a clamp for fixing the cooling pipe 13.
Further, in this embodiment, referring to fig. 1, the inlet and the outlet of the cooling pipe 13 may extend out of the support layer 12, the inlet may be communicated with an external cooling liquid supply pipe, and the outlet is communicated with a cooling liquid treatment recovery pipe.
Further, in this embodiment, with reference to fig. 3, in this embodiment, the hot-air duct 1 may include an outlet section 14 and a mixing section 15, a duct body of the mixing section 15 is used for communicating with the cold-air duct 3 to adjust the temperature of the hot air, and after natural temperature drop, the hot-air requirement that the blast furnace injection temperature is 1250-1300 ℃ is met, the mixing section 15 and the outlet section 14 are sequentially communicated along the hot-air running direction, an inner diameter of the mixing section 15 is greater than an inner diameter of the outlet section 14, the air temperature drops after the cooling and hot air are mixed in the mixing section 15, at this time, the destructiveness to the duct becomes weak, at this time, the outlet section 14 with a smaller diameter may be used for conveying, so that the cost may be reduced; in addition, the mixing section 15 also mixes the hot air and the cold air, so that the gas flow of the mixing section 15 is large, the impact on the inner wall of the mixing section 15 is large, and the mixing section 15 with large size can be matched with the hot air with large flow. In addition, the mixing section 15 may adopt the above three-layer structure having the working layer 11, the cooling pipe 13 and the supporting layer 12 which are sequentially arranged from inside to outside, the outlet section 14 may adopt a pipe having the same structure as the mixing section 15, and the outlet section 14 may also adopt a pipe having only the supporting layer 12 structure because the wind temperature of the outlet section 14 is lowered, which is not limited herein. The hot air pipe 1 and the cold air pipe 3 are actually a three-way pipe and are provided with a first port, a second port and a third port which are communicated with each other, wherein the first port is one end of the hot air pipe 1, the second port is a cold air inlet of the cold air pipe 3, and the third port is the other end of the hot air pipe 1. The mixing section 15 and the outlet section 14 are sequentially communicated along the hot air running direction, and the inner diameter of the mixing section 15 is larger than the inner diameter HIA of the outlet section 14, so that the structure stability at the three-branch position is facilitated, and the surface temperature of the steel shell at the position is reduced.
The second aspect, based on same technological concept, the utility model also provides a hot air system, this hot air system includes hot-blast furnace 2 and foretell hot-blast main 1, and hot-blast furnace 2 is equipped with a plurality ofly, and hot-blast main 1 corresponds the setting with hot-blast furnace 2, hot-blast main 1's hot-blast channel one end and the export intercommunication of the hot-blast furnace 2 that corresponds, the other end be used for with the income wind gap intercommunication of blast furnace. Thereby sending the hot air of the hot blast stove 2 to the blast furnace.
Further, with reference to fig. 3, in this embodiment, the hot air system further includes a cold air pipe 3, the cold air pipe 3 is disposed corresponding to the hot air pipe 1, one end of the cold air pipe 3 is used for introducing cold air, and the other end of the cold air pipe is connected to the pipe body of the corresponding hot air pipe 1, so that the cold air pipe 3 is communicated with the hot air channel of the corresponding hot air pipe 1. Specifically, when the hot air duct 1 includes the mixing section 15 and the outlet section 14, the other end of the cold air duct 3 may be communicated with the duct body of the mixing section 15 of the hot air duct 1, that is, one end of the cold air duct 3 is communicated with the hot air channel of the working layer 11. The air temperature is directly and uniformly mixed in the hot air pipeline, and an air mixing furnace is not needed, so that the investment of the air mixing furnace is saved.
Further, in this embodiment, with reference to fig. 3, the hot air system may further include a cold air adjusting valve 4, and a cold air adjusting valve 4 is disposed on a tube body of each cold air tube 3 to adjust an amount of cold air in the mixed hot air tube 1, so as to adjust a temperature of hot air supplied to the blast furnace.
Furthermore, in this embodiment, with reference to fig. 3, the hot air system may further include a cold air cut-off valve 5, and a cold air cut-off valve 5 is disposed on a tube body of each cold air tube 3 to enable the cold air fed into the hot air tube 1 to be turned on or off. The cold air stop valve 5 and the cold air regulating valve 4 can be sequentially arranged on the tube body of the cold air tube 3 along the cold air running direction and can also be reversely arranged, namely the cold air regulating valve 4 and the cooling stop valve can be sequentially arranged on the tube body of the cold air tube 3 along the cold air running direction and are not limited here.
Further, in this embodiment, with reference to fig. 3, the hot blast system may further include a hot blast main pipe 6, the other end of the hot blast channel of each hot blast pipe 1 is communicated with the pipe body of the hot blast main pipe 6, that is, the outlet section 14 of the hot blast pipe 1 is communicated with the pipe body of the hot blast main pipe 6, and the outlet of the hot blast main pipe 6 is used for being communicated with the air inlet of the blast furnace. That is to say, the hot air pipes 1 communicated with each hot air furnace 2 belong to branch pipes, and hot air in each hot air pipe 1, namely in the branch pipes, is gathered into the hot air main pipe 6 and then is uniformly delivered to the blast furnace, so that the arrangement of the number of pipelines can be reduced, and the requirement of the hot air flow of the blast furnace can be met.
Furthermore, in the present embodiment, with reference to fig. 3, the hot air system may further include a hot air adjusting valve 7, and the pipe body of each hot air pipe 1 is provided with the hot air adjusting valve 7 to adjust the flow rate of the hot air in the hot air pipe 1; specifically, the hot air regulating valve 7 may be disposed on the pipe body of the outlet section 14 of the corresponding hot air pipe 1 to regulate the flow rate of the hot air mixed with the cold air. The hot air regulating valve 7 is arranged at the outlet section 14, so that the high-temperature load of the hot air regulating valve 7 can be reduced, and the service life of the hot air regulating valve 7 can be prolonged.
The cold air shut-off valve 5, the cold air regulating valve 4, and the hot air regulating valve 7 are all conventional technologies, and may be selected according to needs and functions, and are not limited herein.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including the preferred embodiment and all changes and modifications that fall within the scope of the present application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (10)
1. A hot blast duct, comprising:
the working layer is enclosed into a hot air channel for hot air to pass through, one end of the hot air pipeline is used for being communicated with an outlet of the hot air furnace, and the other end of the hot air pipeline is used for being communicated with an air inlet of the blast furnace;
the supporting layer is sleeved on the periphery of the working layer;
and the cooling pipeline is arranged between the working layer and the supporting layer and is provided with an inlet for cooling medium to enter and an outlet for the cooling medium to discharge.
2. The hot air duct according to claim 1, wherein the cooling duct is spirally disposed with an axial direction of the working layer as a center; or a plurality of cooling pipelines are arranged and are parallel to the axial direction of the working layer at intervals.
3. The hot air duct according to claim 1, wherein the inlet and outlet of the cooling duct protrude outside the support layer.
4. The hot air duct according to claim 1, comprising:
an outlet section;
the mixing section, the shaft of mixing section is used for with the cold wind pipe intercommunication, the mixing section with the export section communicates along hot-blast traffic direction in proper order, the internal diameter of mixing section is greater than the internal diameter of export section.
5. A hot blast system, characterized in that the hot blast system comprises:
a plurality of hot blast stoves;
the hot-blast air pipe of any one of claims 1 to 4, which is disposed corresponding to the hot-blast stove, and one end of the hot-blast air passage of the hot-blast air pipe is communicated with the corresponding outlet of the hot-blast stove, and the other end is used for being communicated with the air inlet of the blast furnace.
6. The hot air system according to claim 5, further comprising:
the cold air pipe corresponds the setting with the hot-blast main, cold air pipe one end is used for letting in cold wind, and the other end with correspond the pipe shaft of hot-blast main is connected, so that the cold air pipe with correspond the hot-blast channel intercommunication of hot-blast main.
7. The hot air system according to claim 6, further comprising:
and each cold air adjusting valve is arranged on the pipe body of each cold air pipe.
8. The hot air system according to claim 6, further comprising:
and the cold air cut-off valve is arranged on each cold air pipe body.
9. Hot air system according to any of the claims 5-8, characterized in that the hot air system further comprises:
the other end of the hot air channel of each hot air pipe is communicated with the pipe body of the hot air main pipe, and the outlet of the hot air main pipe is communicated with the air inlet of the blast furnace.
10. The hot air system according to claim 9, further comprising:
and the pipe body of each hot air pipe is provided with the hot air regulating valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221899402.6U CN217997233U (en) | 2022-07-22 | 2022-07-22 | Hot-blast pipe and hot air system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221899402.6U CN217997233U (en) | 2022-07-22 | 2022-07-22 | Hot-blast pipe and hot air system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217997233U true CN217997233U (en) | 2022-12-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221899402.6U Active CN217997233U (en) | 2022-07-22 | 2022-07-22 | Hot-blast pipe and hot air system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217997233U (en) |
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2022
- 2022-07-22 CN CN202221899402.6U patent/CN217997233U/en active Active
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