CN217677603U - Blast furnace coal injection exhaust device - Google Patents
Blast furnace coal injection exhaust device Download PDFInfo
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- CN217677603U CN217677603U CN202221241047.3U CN202221241047U CN217677603U CN 217677603 U CN217677603 U CN 217677603U CN 202221241047 U CN202221241047 U CN 202221241047U CN 217677603 U CN217677603 U CN 217677603U
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Abstract
The utility model discloses a blast furnace coal injection exhaust apparatus, the device includes buggy storehouse, jetting jar, ball valve, governing valve, reducing short circuit and blast pipe. The blowing tank is provided with an exhaust emission interface, one end of the ball valve is connected with the exhaust emission interface, the other end of the ball valve is connected with one end of the regulating valve, the other end of the regulating valve is connected with one end of the reducing short circuit, the other end of the reducing short circuit is connected with one end of the exhaust pipe, and the other end of the exhaust pipe is connected with the pulverized coal bunker; wherein the pipe diameter of blast pipe is greater than the latus rectum of ball valve. The utility model provides a stable controllable jetting jar exhaust diffusing device.
Description
Technical Field
The utility model relates to an exhaust diffusion equipment, concretely relates to blast furnace ironmaking production in-process coal injection system's exhaust diffusion device.
Background
The blast furnace injection coal powder is pulverized anthracite powder or bituminous coal powder or mixed coal powder of the two which is directly injected into the blast furnace from a blast furnace tuyere to replace coke to play the role of providing heat and reducing agent, thereby reducing the coke ratio and the pig iron cost, and being a great technical revolution of modern blast furnace smelting. With the development and progress of blast furnace technology, the original blast furnace with small volume and high energy consumption is slowly replaced by the blast furnace with medium-sized, large-sized volume and low energy consumption, the coal injection amount of the blast furnace is increased to hundreds of tons per hour from several tons per hour, and the pressure of an injection tank is increased to about 1000kPa from 500-600 kPa. The common blast furnace exhaust and emission system adopts a mode of one valve or a large valve for emission, the pressure in the injection tank can reach nearly 1000kPa before emission, the great pressure can be caused to a pulverized coal bunker and a pulverized coal bunker top dust remover due to the large pressure difference existing between the injection tank and a terminal exhaust port and the overlarge exhaust amount in the initial stage of direct exhaust and emission, the pulverized coal leakage can pollute the environment, the possibility of damaging the pulverized coal bunker and the dust remover exists, and the abrasion of an exhaust pipeline can be aggravated due to the fast flow speed. Therefore, how to stably diffuse the controllable flow to the injection tank has great significance on environmental protection of the injection system, equipment service life and the like.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a blast furnace coal injection exhaust apparatus aims at solving the blast furnace coal injection jar and diffuses the in-process because the injection jar causes too big damage equipment, polluted environment scheduling problem of exhaust initial stage exhaust flow with diffusing terminal gas vent pressure differential to and reduce blast pipe wear problem.
In order to realize the purpose, the utility model adopts the following technical scheme:
a blast furnace coal injection exhaust device comprises a pulverized coal bin, an injection tank, a ball valve, an adjusting valve, a reducing short joint and an exhaust pipe;
the blowing tank is provided with an exhaust and release interface, one end of the ball valve is connected with the exhaust and release interface, the other end of the ball valve is connected with one end of the regulating valve, the other end of the regulating valve is connected with one end of the reducing short circuit, the other end of the reducing short circuit is connected with one end of the exhaust pipe, and the other end of the exhaust pipe is connected with the pulverized coal bunker; wherein the pipe diameter of blast pipe is greater than the latus rectum of ball valve.
Preferably, the ball valve is a pneumatic hard seal ball valve.
Preferably, the regulating valve is a pneumatic ceramic regulating ball valve.
The utility model has the advantages that:
the utility model provides a blast furnace coal injection exhaust apparatus is a stable controllable jetting jar exhaust diffuses device, can effectively solve blast furnace coal injection jetting jar diffuse in-process because jetting jar causes too big damage equipment, polluted environment scheduling problem of exhaust initial stage exhaust flow with diffusing terminal gas vent pressure differential greatly, and reduce blast pipe wear problem.
Drawings
Fig. 1 is a schematic structural view of a blast furnace coal injection diffusing exhaust device of the utility model.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Referring to fig. 1, fig. 1 is a schematic view of a main structure of a blast furnace coal injection exhaust device. As shown in fig. 1, the blast furnace coal injection exhaust device provided by the embodiment includes a pulverized coal bunker 1, an injection tank 2, a ball valve 3, a regulating valve 4, a reducing short circuit 5 and an exhaust pipe 6. The blowing tank 2 is provided with an exhaust and diffusion interface, one end of the ball valve 3 is connected with the exhaust and diffusion interface, the other end of the ball valve is connected with one end of the regulating valve 4, the other end of the regulating valve 4 is connected with one end of the reducing short circuit 5, the other end of the reducing short circuit 5 is connected with one end of the exhaust pipe 6, and the other end of the exhaust pipe 6 is connected with the pulverized coal bunker 1; wherein the pipe diameter of the exhaust pipe 6 is larger than the drift diameter of the ball valve 3.
The coal powder bin 1 is a storage device for coal powder and an exhaust and diffusion terminal of the injection tank 2, and a bag-type dust remover is generally arranged on the coal powder bin 1 or is connected with a powder making and dust collecting pipe, and is normally in a micro-negative pressure state. The injection tank 2 is a key device for injecting coal into the blast furnace, and after injection is finished, gas in the injection tank 2 needs to be discharged so as to load coal powder from the coal powder bin 1. The injection tank 2 is also a pressure swing device, and the working pressure is from normal pressure to about 1000kPa (different blast furnaces and injection distances may be different).
The ball valve 3 is a pneumatic isolation valve between the injection tank 2 and the pulverized coal bunker 1, and the medium is a gas-solid mixture, so the ball valve 3 can be a hard-seal full-bore valve, and the embodiment is a pneumatic hard-seal ball valve 3. The regulating valve 4 is a gas flow regulating device for the exhaust and the diffusion of the injection tank 2, and regulates the opening of the valve according to the pressure of the injection tank 2 so as to regulate the exhaust and the diffusion flow; this embodiment is a pneumatic ceramic modulating ball valve 4.
The reducing short circuit 5 is a short circuit connecting the regulating valve 4 and the exhaust pipe 6, and in order to reduce the abrasion of the exhaust pipe 6, the diameter of the exhaust pipe 6 is generally larger than the drift diameter of the regulating valve 4 and the ball valve 3, for example, the diameter is larger by one specification according to the pipe diameter size. The exhaust pipe 6 is a connecting pipe for connecting the injection tank 2 and the top of the pulverized coal bin 1, and the pipe diameter of the exhaust pipe 6 is larger than the drift diameters of the ball valve 3 and the regulating valve 4 by one specification, so that the flow velocity of a gas-solid mixture in the pipeline can be effectively reduced, and the abrasion is reduced.
The whole working process of the blast furnace coal injection exhaust device is as follows:
after the blowing of the blowing tank 2 is finished, the relevant valve is opened and closed to the correct position, and the pressure in the blowing tank 2 is about 1000kPa (which is different according to different systems);
opening the pneumatic hard seal ball valve 3;
the opening of the ceramic adjusting ball valve 4 is adjusted according to the pressure in the injection tank 2, so that the air flow is stably released into the pulverized coal bunker 1;
the opening of the ceramic regulating ball valve 4 is smaller as the pressure in the injection tank 2 is higher, and the pressure in the pulverized coal bunker 1 is detected in real time in the process of diffusion, and if the pressure in the pulverized coal bunker 1 exceeds a set value, the opening of the ceramic regulating valve 4 needs to be reduced;
along with the gas in the injection tank 2 is released into the pulverized coal bunker 1, the pressure in the injection tank 2 is continuously reduced, and the opening degree of the ceramic adjusting ball valve 4 is continuously increased. When the pressure in the injection tank 2 reaches the safe release pressure, the opening of the ceramic ball valve 4 is adjusted to 100 percent;
when the pressure in the injection tank 2 is released to reach the set release pressure, the exhaust and diffusion process of the injection tank 2 is finished, and the injection tank 2 can wait for blanking to continue the next injection cycle.
The above description is the preferred embodiment of the present invention and the technical principle applied by the same, and for those skilled in the art, without departing from the spirit and scope of the present invention, any obvious changes such as equivalent transformation, simple replacement, etc. based on the technical solution of the present invention all belong to the protection scope of the present invention.
Claims (3)
1. A blast furnace coal injection exhaust device is characterized by comprising a pulverized coal bin, an injection tank, a ball valve, an adjusting valve, a reducing short circuit and an exhaust pipe;
the blowing tank is provided with an exhaust and release interface, one end of the ball valve is connected with the exhaust and release interface, the other end of the ball valve is connected with one end of the regulating valve, the other end of the regulating valve is connected with one end of the reducing short circuit, the other end of the reducing short circuit is connected with one end of the exhaust pipe, and the other end of the exhaust pipe is connected with the pulverized coal bunker; wherein the pipe diameter of blast pipe is greater than the latus rectum of ball valve.
2. The blast furnace coal injection venting device of claim 1 wherein the ball valve is a pneumatic hard seal ball valve.
3. The blast furnace coal injection venting device of claim 1 wherein the regulating valve is a pneumatic ceramic regulating ball valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221241047.3U CN217677603U (en) | 2022-05-23 | 2022-05-23 | Blast furnace coal injection exhaust device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221241047.3U CN217677603U (en) | 2022-05-23 | 2022-05-23 | Blast furnace coal injection exhaust device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217677603U true CN217677603U (en) | 2022-10-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221241047.3U Active CN217677603U (en) | 2022-05-23 | 2022-05-23 | Blast furnace coal injection exhaust device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217677603U (en) |
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2022
- 2022-05-23 CN CN202221241047.3U patent/CN217677603U/en active Active
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Legal Events
| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230509 Address after: No. 2 Guangyi Road, Anshan High-tech Zone, Liaoning Province, 114000 Patentee after: Liaoning baitelade Engineering Technology Co.,Ltd. Address before: 101500 20 Xingsheng South Road, economic development zone, Miyun District, Beijing Patentee before: BEIJING BETTERCLYDE ENGINEERING TECHNOLOGY Co.,Ltd. |
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| TR01 | Transfer of patent right |