Method and device for opening air port of blast furnace
阅读说明：本技术 一种高炉开风口方法和装置 (Method and device for opening air port of blast furnace ) 是由 陈生利 陈�胜 何新 陈开泉 周凌云 于 2019-11-30 设计创作，主要内容包括：本发明涉及高炉风口安全领域,更具体地说,它涉及一种高炉开风口方法和装置,其技术方案要点是：一种高炉开风口方法,应用于高炉开风口装置,所述装置包括窥视孔阀、压缩空气填充包和捅风口圆钢,所述窥视孔阀后端连接有窥视孔镜片；所述方法包括：将所述窥视孔阀关闭,卸下窥视孔阀后端的窥视孔镜片；将所述压缩空气填充包连接至窥视孔阀的后端,将捅风口圆钢插入所述压缩空气填充包；往所述压缩空气填充包内通入高压压缩空气,打开所述窥视孔阀,将所述捅风口圆钢敲打入风口将堵风口炮泥与轻质砖捅破。本发明具有防止高温高压气体从吹管视孔反吹出来的优点,避免对作业人员造成伤害,增强了高炉开风口作业过程的安全性能。(The invention relates to the field of blast furnace tuyere safety, in particular to a blast furnace tuyere opening method and a blast furnace tuyere opening device, which have the technical scheme main points that: a blast furnace tuyere opening method is applied to a blast furnace tuyere opening device, the device comprises a peephole valve, a compressed air filling bag and tuyere poking round steel, and the rear end of the peephole valve is connected with a peephole lens; the method comprises the following steps: closing the peephole valve, and detaching a peephole lens at the rear end of the peephole valve; connecting the compressed air filling bag to the rear end of the peephole valve, and inserting round steel at the poking opening into the compressed air filling bag; and introducing high-pressure compressed air into the compressed air filling bag, opening the peeping hole valve, knocking the round steel for poking the air inlet into the air inlet to poke the air inlet blocking stemming and the light brick to be broken. The invention has the advantages of preventing high-temperature and high-pressure gas from being blown back from the blowpipe sight hole, avoiding the damage to operators and enhancing the safety performance of the blast furnace in the process of blowing the blast furnace tuyere.)
1. The blast furnace tuyere opening method is characterized by being applied to a blast furnace tuyere opening device, wherein the device comprises a peephole valve, a compressed air filling bag and tuyere poking round steel, and a peephole lens is connected to the rear end of the peephole valve; the method comprises the following steps:
closing the peephole valve, and detaching a peephole lens at the rear end of the peephole valve;
connecting the compressed air filling bag to the rear end of the peephole valve, and inserting round steel at the poking opening into the compressed air filling bag;
and introducing high-pressure compressed air into the compressed air filling bag, opening the peeping hole valve, knocking the round steel for poking the air inlet into the air inlet to poke the air inlet blocking stemming and the light brick to be broken.
2. The blast furnace tuyere method according to claim 1, wherein a compressed air branch pipe is provided on the compressed air filling bag, and a compressed air control valve is provided in the compressed air branch pipe; after the step of inserting the air inlet round steel into the compressed air filling bag, the method further comprises the following steps:
and opening a compressed air control valve in the compressed air branch pipe, and allowing high-pressure compressed air to enter the compressed air filling bag from the compressed air branch pipe.
3. The blast furnace tuyere method of claim 1, further comprising, after the step of striking a tuyere poke round steel into the tuyere:
and pumping out the round steel for poking the air inlet to the compressed air filling bag, closing the peephole valve, closing the compressed air control valve, detaching the compressed air filling bag, and installing the peephole lens.
4. The utility model provides a blast furnace opens wind gap device which characterized in that: including the peephole valve, the peephole valve is connected with compressed air and fills the package, compressed air fills package one end and peephole valve intercommunication, and the opening has been seted up to the other end, the opening part activity is pegged graft and is had the wind gap round steel of disclosing, compressed air fills and is provided with the compressed air branch pipe on the package, compressed air branch pipe and outside air supply intercommunication, install the compressed air control valve in the compressed air branch pipe.
5. The blast furnace tuyere device according to claim 4, wherein: the compressed air filling bag is characterized in that the number of the compressed air branch pipes is two, and the two compressed air branch pipes are symmetrically arranged on the compressed air filling bag.
6. The blast furnace tuyere device according to claim 4, wherein: the internal diameter of the compressed air branch pipe is 25mm, and the compressed air branch pipe is connected with an external air source through a quick connector.
7. The blast furnace tuyere device according to claim 4, wherein: the compressed air filling bag is connected to the peephole valve through threads.
8. The blast furnace tuyere device according to claim 4, wherein: and a poking strip balancing rod is arranged on the poking opening round steel.
9. The blast furnace tuyere device according to claim 4, wherein: the opening is sleeved with and embedded with a sealing ring, and the round steel for poking the air opening is movably inserted in the sealing ring.
10. The blast furnace tuyere device according to claim 9, wherein: the sealing ring is a double-layer sealing ring, the sealing ring is an O-shaped sealing ring, and the inner diameter of the O-shaped sealing ring is the same as the outer diameter of the round steel of the poking air opening.
Technical Field
The invention relates to the field of blast furnace tuyere safety, in particular to a method and a device for opening a tuyere of a blast furnace.
Background
The blast furnace tuyere opening is generally carried out in a blast furnace production state, and a blast furnace operator can judge the tuyere opening process according to comprehensive smelting parameters such as air quantity, air pressure, air speed and the like in the blast furnace. The air opening is a technology of breaking stemming and light bricks for blocking the air opening to form holes, and then blowing the air opening completely by high-speed and high-pressure hot air fed by a blowing pipe.
At present, the method generally adopted by domestic blast furnace tuyere opening is as follows: after tapping and blocking the blast furnace, a plumber opens a blow pipe sight hole cover plate at the rear end of a tuyere blow pipe, inserts a drill steel into the blow pipe for stokehole workers, strikes the drill steel by a hammer, breaks stemming and light bricks for blocking the tuyere to form a channel, extracts the drill steel and rapidly closes the blow pipe sight hole cover plate.
The above scheme has the defects that: in the method, the gap is large due to the fact that the blow pipe sight hole and the steel chisel are not sealed, a large amount of high-pressure hot air is blown out from the blow pipe sight hole, and operating personnel are easily scalded. When stemming blocking the air port is poked through the light bricks, airflow in the furnace flows back into the blowpipe, so that high-pressure high-speed hot air blown out from the sight hole of the blowpipe is mixed with coal gas with a certain content, and serious harm is brought to operating personnel.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a blast furnace tuyere opening method and a blast furnace tuyere opening device, which have the advantages of preventing high-temperature and high-pressure gas from being blown back from a blow pipe sight hole, avoiding injury to operators and enhancing the safety performance of the blast furnace tuyere opening operation process.
A blast furnace tuyere opening method is applied to a blast furnace tuyere opening device, the device comprises a peephole valve, a compressed air filling bag and tuyere poking round steel, and the rear end of the peephole valve is connected with a peephole lens; the method comprises the following steps:
closing the peephole valve, and detaching a peephole lens at the rear end of the peephole valve;
connecting the compressed air filling bag to the rear end of the peephole valve, and inserting round steel at the poking opening into the compressed air filling bag;
introducing high-pressure compressed air into the compressed air filling bag, opening the peeping hole valve, knocking round steel for poking the air opening into the air opening to poke the air opening blocking stemming and the light brick open
In one embodiment, the compressed air filling bag is provided with a compressed air branch pipe, and a compressed air control valve is arranged in the compressed air branch pipe; after the step of inserting the air inlet round steel into the compressed air filling bag, the method further comprises the following steps:
and opening a compressed air control valve in the compressed air branch pipe, and allowing high-pressure compressed air to enter the compressed air filling bag from the compressed air branch pipe.
In one embodiment, after the step of striking the tuyere poking round steel into the tuyere, the method further comprises the following steps:
and pumping out the round steel for poking the air inlet to the compressed air filling bag, closing the peephole valve, closing the compressed air control valve, detaching the compressed air filling bag, and installing the peephole lens.
The utility model provides a blast furnace blast gate device, includes peep hole valve, peep hole valve is connected with compressed air and fills the package, compressed air fills package one end and peep hole valve intercommunication, and the opening has been seted up to the other end. The air inlet round steel is movably inserted at the opening, the compressed air filling bag is provided with a compressed air branch pipe, and a compressed air control valve is installed in the compressed air branch pipe.
In one embodiment, the compressed air branch pipes are provided in two, and the two compressed air branch pipes are symmetrically arranged on the compressed air-filled bag.
In one embodiment, the internal diameter of the compressed air branch pipe is 25mm, and the compressed air branch pipe is connected with an external air source by adopting a quick interface.
In one embodiment, the compressed air-filled bag is attached to the peephole valve by a screw thread.
In one embodiment, a poking strip balancing rod is arranged on the poking opening round steel.
In one embodiment, a sealing ring is embedded in the opening in a sleeved mode, and the round steel for poking the air opening is movably inserted into the sealing ring.
In one embodiment, the sealing ring is a double-layer sealing ring, the sealing ring is an O-shaped sealing ring, and the inner diameter of the O-shaped sealing ring is the same as the outer diameter of the vent poking round steel.
In conclusion, the invention has the following beneficial effects:
when the blast furnace needs to be opened, the high-pressure hot air in the blow pipe is suppressed by introducing gas into the compressed air filling bag, so that the damage to operators caused by back-blowing of the high-pressure high-temperature hot air in the blow pipe from the valve hole of the peephole in the air opening process is avoided, and the safety performance of the blast furnace in the air opening operation process is enhanced.
Drawings
FIG. 1 is a schematic flow chart of a method for blowing in a blast furnace according to the present embodiment;
FIG. 2 is a schematic structural view of a blast furnace tuyere device according to the present embodiment;
FIG. 3 is a schematic view of the blast furnace tuyere device of the present embodiment.
In the figure: 1. a tuyere blocking device; 2. a tuyere small sleeve; 3. a blast furnace brickwork; 4. an air supply blowpipe; 5. blowing a pipe and looking at the hole; 6. a blowpipe sight hole cover plate; 7. a peep hole valve; 8. a screw thread interface; 9. a compressed air-filled bag; 10. a compressed air control valve; 11. an O-shaped sealing ring; 12. a compressed air branch pipe; 13. a barrel balance bar; 14. round steel for poking the air opening.
Detailed Description
The invention is described in detail below with reference to the figures and examples.
A blast furnace tuyere opening method, as shown in figure 1, comprises the following steps:
and 101, closing the peephole valve, and detaching a peephole lens at the rear end of the peephole valve.
And 102, connecting the compressed air filling bag to the rear end of the peephole valve, and inserting round steel at the poking opening into the compressed air filling bag.
103, introducing high-pressure compressed air into the compressed air filling bag, opening the peep hole valve, knocking round steel for poking the air inlet into the air inlet to poke the air inlet blocking stemming and the light bricks to break
Closing the peep hole valve earlier and then installing compressed air and filling the package, preventing that the high-pressure high fever air in the blowpipe from spilling over, will disclose the wind gap round steel and insert the back in the compressed air fills the package, let in high-pressure compressed air in toward the air compression package, in the twinkling of an eye that the peep hole valve was opened, can suppress and live the high-pressure high fever air blowback in the blowpipe, avoid high-pressure high fever air to cause the injury to operating personnel from peep hole valve department.
In one embodiment, the compressed air filling bag is provided with a compressed air branch pipe, and a compressed air control valve is arranged in the compressed air branch pipe; after the step of inserting the air inlet round steel into the compressed air filling bag, the method further comprises the following steps:
and opening a compressed air control valve in the compressed air branch pipe, and allowing high-pressure compressed air to enter the compressed air filling bag from the compressed air branch pipe.
The time for compressed air to enter the compressed air filling bag is effectively controlled through the control of the compressed air control valve, and the compressed air filling bag is disconnected when air needs to be introduced, so that the waste of compressed air gas is avoided.
In one embodiment, after the step of striking the tuyere poking round steel into the tuyere, the method further comprises the following steps:
and pumping out the round steel for poking the air inlet to the compressed air filling bag, closing the peephole valve, closing the compressed air control valve, detaching the compressed air filling bag, and installing the peephole lens.
After the blast furnace is blown, the peep hole valve is closed, the compressed air control valve is closed, and the air is stopped from being introduced into the compressed air filling bag, so that the high-pressure high-heat gas air is prevented from rushing out.
As shown in fig. 2, the blast furnace tuyere device comprises a
As shown in figure 3, when the blast furnace needs to be opened, the number of the tuyere to be opened is selected, the blow pipe sight
In one embodiment, there are two compressed
The two compressed
In one embodiment, the internal diameter of the compressed
The quick connector is adopted to facilitate the installation and replacement of the compressed
In one embodiment, the compressed air-filled bag is attached to the
The compressed air filling bag is connected to the
In one embodiment, a
When the poking
In one embodiment, a sealing ring is embedded in the opening, and the vent poking
The sealing ring is arranged at the opening, so that air sealing can be improved, and the back blowing pressing effect of the gas in the compressed air filling bag on high-pressure hot air is improved.
In one embodiment, the seal ring is a double layer seal ring.
The sealing washer adopts double-deck setting to further improve the leakproofness of opening part.
In one embodiment, the sealing ring is an O-
The O-shaped rubber sealing ring and the structure of the installation part are extremely simple and standardized, so that the O-shaped rubber sealing ring is more convenient and easier to install and replace.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
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