CN211771413U - Control device for preventing bottom blowing nitrogen return of converter - Google Patents
Control device for preventing bottom blowing nitrogen return of converter Download PDFInfo
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- CN211771413U CN211771413U CN201921580762.8U CN201921580762U CN211771413U CN 211771413 U CN211771413 U CN 211771413U CN 201921580762 U CN201921580762 U CN 201921580762U CN 211771413 U CN211771413 U CN 211771413U
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- nitrogen
- valve
- argon
- pipe
- plc system
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 129
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 57
- 238000007664 blowing Methods 0.000 title claims abstract description 19
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 108
- 229910052786 argon Inorganic materials 0.000 claims abstract description 54
- 230000001105 regulatory effect Effects 0.000 claims abstract description 15
- 229910000831 Steel Inorganic materials 0.000 abstract description 16
- 239000010959 steel Substances 0.000 abstract description 16
- 229910001873 dinitrogen Inorganic materials 0.000 abstract description 15
- 206010003591 Ataxia Diseases 0.000 abstract description 3
- 206010010947 Coordination abnormal Diseases 0.000 abstract description 3
- 230000002159 abnormal effect Effects 0.000 abstract description 3
- 208000016290 incoordination Diseases 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 abstract description 3
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 241000357293 Leptobrama muelleri Species 0.000 description 1
- PWKWDCOTNGQLID-UHFFFAOYSA-N [N].[Ar] Chemical compound [N].[Ar] PWKWDCOTNGQLID-UHFFFAOYSA-N 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The utility model provides a control device for preventing bottom blowing nitrogen back of a converter, wherein an argon pressure regulating valve is arranged on an argon pipe, and a nitrogen flowmeter and an emergency shut-off valve are arranged on the nitrogen pipe; a PLC system is added, and an analog quantity control template is added in the PLC system; adding HMI operation picture to display abnormal flow alarm prompt picture; and the argon pressure regulating valve, the nitrogen flowmeter, the emergency shut-off valve and the HMI operation picture are respectively connected with the PLC system. The utility model discloses can carry out real time monitoring to nitrogen gas system, in time discover and solve among the prior art valve action and nitrogen gas discharge in time cause have the problem that residual nitrogen gas sneaks into the molten steel, avoid appearing the molten steel and return nitrogen, composition serious quality problems such as incoordination, guarantee the internal quality of molten steel, reduce nitrogen gas consumption.
Description
Technical Field
The utility model belongs to steelmaking controlling means field especially relates to a prevent that converter bottom from blowing back controlling means of nitrogen.
Background
The top-bottom composite blowing mode is the main stream of converter steelmaking in China, the oxidation reaction is carried out on molten iron by blowing oxygen through an oxygen lance of the converter, and when the oxygen lance blows oxygen, a bottom blowing system carries out molten steel argon stirring.
Because bottom blowing argon gas and nitrogen gas pipeline connect simultaneously at a pipeline, 4 ~ 10 bottom guns that are located the stove bottom of this tube coupling, at the bottom blowing in-process, the bottom blowing argon gas pneumatic valve is opened when the converter top blows oxygen, blows argon gas in to the converter through the pipeline, if nitrogen gas valve gas leakage, valve trouble or nitrogen gas trip valve are not tight this moment, there is nitrogen gas to mix with in the bottom blowing argon gas, lead to the molten steel to return nitrogen, the composition is incoordination, causes the nitrogen gas extravagant as a result, the serious quality problems of molten steel back nitrogen. The phenomenon of molten steel nitrogen return caused by bottom blowing cannot be found at the first time, and can only be found when the molten steel is tested after tapping is finished, so that the molten steel has serious quality defects which cannot be compensated; the leakage of the nitrogen pipeline also causes unstable argon pressure and influences the effect of bottom blowing argon.
Disclosure of Invention
The utility model provides a can solve the problem that the molten steel was sneaked into to remaining nitrogen gas that causes in time because of the nitrogen gas discharge, reduce the molten steel and return nitrogen probability, improve the converter bottom blowing that prevents of molten steel inherent quality and return nitrogen controlling means.
Therefore, the utility model discloses the technical solution who takes does:
a control device for preventing bottom blowing of a converter from returning nitrogen comprises an argon pipe, an argon stop valve, an argon hand valve, a nitrogen pipe, a nitrogen stop valve and a nitrogen hand valve, wherein an argon pressure regulating valve is arranged on the argon pipe between the argon stop valve and the argon hand valve; a nitrogen flow meter and an emergency shut-off valve which is normally opened when power is on and automatically closed when power is off are arranged on a nitrogen pipe between the nitrogen cut-off valve and the nitrogen hand valve; a PLC system is additionally arranged, an analog quantity control template is added in the PLC system, the analog quantity control template detects a signal fed back by the nitrogen flowmeter and controls an argon pressure regulating valve on an argon pipeline; adding an HMI operation picture, wherein the HMI operation picture is added with an operation window and displays a flow abnormity alarm prompt picture; and the argon pressure regulating valve, the nitrogen flowmeter, the emergency shut-off valve and the HMI operation picture are respectively connected with the PLC system.
The utility model has the advantages that:
the utility model discloses can carry out real time monitoring to the nitrogen gas system, in time discover and solve among the prior art valve malfunction and nitrogen gas discharge in time cause have remaining nitrogen gas sneak into the problem of molten steel, effectively reduce because the molten steel that the problem of bottom blowing system caused returns the nitrogen probability, avoid appearing the molten steel and return nitrogen, composition serious quality problems such as incoordination, guarantee the inherent quality of molten steel, reduce the consumption and the waste of nitrogen gas.
Drawings
FIG. 1 is a schematic view of a control device for preventing bottom-blown nitrogen from returning to a converter;
fig. 2 is a PLC system electrical control block diagram.
In the figure: the automatic control system comprises a bottom gun 1, a gas flowmeter 2, a flow regulating valve 3, a gas pipeline 4, an argon shut-off valve 5, an argon pressure regulating valve 6, an argon hand valve 7, an argon pipe 8, an HMI operation picture 9, a PLC system 10, a nitrogen hand valve 11, an emergency shut-off valve 12, a nitrogen flowmeter 13, a nitrogen shut-off valve 14 and a nitrogen pipe 15.
Detailed Description
As shown in FIG. 1, a bottom lance 1 at the lower part of the converter is respectively connected with a gas flowmeter 2 and 10 flow regulating valves 3, the rear parts of the flow regulating valves 3 are connected with a gas pipeline 4, and the gas pipeline 4 is respectively connected with an argon pipe 8 and a nitrogen pipe 15.
The utility model discloses a control device for preventing converter bottom blowing back nitrogen, which is characterized in that an argon pressure regulating valve 6 is arranged on an argon pipe 8 between an argon stop valve 5 and an argon hand valve 7 on the basis of the argon stop valve 5, the argon hand valve 7, the argon pipe 8, the nitrogen hand valve 11, the nitrogen stop valve 14 and the nitrogen pipe 15; a nitrogen flow meter 13 and an emergency shut-off valve 12 are respectively arranged on a nitrogen pipe 15 between a nitrogen shut-off valve 14 and a nitrogen hand valve 11, and the emergency shut-off valve 12 is in a state of being normally opened when power is on and automatically closed when power is off under a normal state. Meanwhile, a PLC system 10 is additionally arranged, an analog quantity control template is additionally arranged in the PLC system 10, the analog quantity control template detects 4-20 MA signals fed back by the nitrogen flowmeter 13, and an argon pressure regulating valve 6 on an argon pipe 8 is controlled. An HMI operation picture 9 is additionally arranged, an operation window is added on the HMI operation picture 9, and a warning prompt picture of abnormal flow is displayed. The argon pressure regulating valve 6, the HMI operation screen 9, the emergency shut-off valve 12, and the nitrogen flowmeter 13 are connected to the PLC system 10, respectively. (see FIG. 2)
During the production process of the converter and iron adding of the converter, the argon valve is automatically opened by the bottom blowing valve switching system, the nitrogen flow meter 13 at the front end of the emergency shut-off valve 12 detects the nitrogen flow, and when the flow is abnormal, an alarm prompt is generated on the HMI operation picture 9. The emergency shut-off valve 12 on the nitrogen pipe 15 is automatically closed when power is lost. And the argon valve is kept in a normally open position for molten steel stirring and slag splashing protection, so that the bottom gun 1 in the converter is prevented from being blocked. The argon pressure adjusting valve 6 on the argon pipe 8 starts to increase the argon pressure, so that the flow of the bottom-blown argon is ensured to be stable. After the pressure of the argon pipeline is increased, the amount of argon in the pipeline is kept stable; after the maintainer gets rid of the fault, the alarm picture is cleared for alarm, and the nitrogen emergency shut-off valve 12 is automatically opened. And after the nitrogen flow state is recovered to be normal, the argon pressure is adjusted to be a normal value, and the system is converted into an automatic switching state of an argon-nitrogen valve.
Claims (1)
1. A control device for preventing bottom blowing back of nitrogen in a converter comprises an argon pipe, an argon stop valve, an argon hand valve, a nitrogen pipe, a nitrogen stop valve and a nitrogen hand valve, and is characterized in that an argon pressure regulating valve is arranged on the argon pipe between the argon stop valve and the argon hand valve; a nitrogen flow meter and an emergency shut-off valve which is normally opened when power is on and automatically closed when power is off are arranged on a nitrogen pipe between the nitrogen cut-off valve and the nitrogen hand valve; a PLC system is additionally arranged, an analog quantity control template is added in the PLC system, the analog quantity control template detects a signal fed back by the nitrogen flowmeter and controls an argon pressure regulating valve on an argon pipeline; adding an HMI operation picture, wherein the HMI operation picture is added with an operation window and displays a flow abnormity alarm prompt picture; and the argon pressure regulating valve, the nitrogen flowmeter, the emergency shut-off valve and the HMI operation picture are respectively connected with the PLC system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921580762.8U CN211771413U (en) | 2019-09-23 | 2019-09-23 | Control device for preventing bottom blowing nitrogen return of converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921580762.8U CN211771413U (en) | 2019-09-23 | 2019-09-23 | Control device for preventing bottom blowing nitrogen return of converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211771413U true CN211771413U (en) | 2020-10-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921580762.8U Active CN211771413U (en) | 2019-09-23 | 2019-09-23 | Control device for preventing bottom blowing nitrogen return of converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211771413U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115786644A (en) * | 2022-11-17 | 2023-03-14 | 山东莱钢永锋钢铁有限公司 | Automatic control steel ladle bottom blowing gas conveying equipment |
-
2019
- 2019-09-23 CN CN201921580762.8U patent/CN211771413U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115786644A (en) * | 2022-11-17 | 2023-03-14 | 山东莱钢永锋钢铁有限公司 | Automatic control steel ladle bottom blowing gas conveying equipment |
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