CN114836588B - Positioning method and monitoring system for water leakage of blast furnace tuyere - Google Patents
Positioning method and monitoring system for water leakage of blast furnace tuyere Download PDFInfo
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- CN114836588B CN114836588B CN202210441342.1A CN202210441342A CN114836588B CN 114836588 B CN114836588 B CN 114836588B CN 202210441342 A CN202210441342 A CN 202210441342A CN 114836588 B CN114836588 B CN 114836588B
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- blast furnace
- tuyere
- water leakage
- condition
- positioning
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000012544 monitoring process Methods 0.000 title abstract description 4
- 238000007405 data analysis Methods 0.000 claims abstract description 12
- 239000007789 gas Substances 0.000 claims description 23
- 239000000446 fuel Substances 0.000 claims description 20
- 239000007788 liquid Substances 0.000 claims description 15
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 12
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 10
- 229910052739 hydrogen Inorganic materials 0.000 claims description 10
- 239000001257 hydrogen Substances 0.000 claims description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 239000000498 cooling water Substances 0.000 claims description 8
- 230000001502 supplementing effect Effects 0.000 claims description 7
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 6
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 6
- 239000001569 carbon dioxide Substances 0.000 claims description 6
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 6
- 239000000571 coke Substances 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 238000007689 inspection Methods 0.000 claims description 3
- 239000002817 coal dust Substances 0.000 claims 1
- 230000008859 change Effects 0.000 abstract description 2
- 230000008569 process Effects 0.000 abstract description 2
- 239000002699 waste material Substances 0.000 abstract description 2
- 239000003245 coal Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000012795 verification Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000003211 malignant effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/10—Cooling; Devices therefor
- C21B7/103—Detection of leakages of the cooling liquid
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/16—Tuyéres
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/24—Test rods or other checking devices
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Iron (AREA)
Abstract
The invention discloses a method for positioning water leakage at a blast furnace tuyere and a monitoring system, which belong to the technical field of blast furnace ironmaking, and comprise the following steps: data acquisition, data analysis, water leakage judgment and water leakage air port positioning; according to the implementation process of judging water leakage and then positioning water leakage, the accuracy can be effectively improved, unnecessary resource waste is reduced, and the method is more scientific and efficient; judging and combining four conditions, so as to prevent misjudgment; the whole use can reduce the manual work, improves work efficiency, when the wind gap is damaged, can discover whether the wind gap leaks in the very first time, thereby in time change the stability of guaranteeing the furnace condition, be fit for extensive popularization.
Description
Technical Field
The invention belongs to the technical field of blast furnace ironmaking, and relates to a positioning method for water leakage at a blast furnace tuyere.
Background
The small sleeve of the blast furnace tuyere is an important device in an air inlet system of the blast furnace, and has the function of feeding hot air into the blast furnace. The tuyere small sleeve is damaged and leaked due to the coal flow flushing of a coal gun or contact with molten iron and the like during normal production of the blast furnace, the damage and the leakage of the tuyere small sleeve need to be checked and confirmed in time so as to perform water control or replacement operation, otherwise, the leaked water flows into a hearth to influence the heat balance of the hearth and even possibly cause a malignant accident of cooling the furnace.
The water leakage at the tuyere can affect the normal production of the blast furnace, so that the coke ratio is increased, and the activity of a hearth is reduced. How to timely find and treat the water leakage of the blast furnace cooling equipment is important to the normal production of the blast furnace and the safety of the equipment.
Disclosure of Invention
The invention aims to solve the technical problems of the prior art, and provides a method for positioning water leakage of a blast furnace tuyere, which aims to solve the technical problems, and the invention provides the following technical scheme: a positioning method for water leakage of a blast furnace tuyere comprises the following steps:
s1, data acquisition: collecting liquid level data of expansion tanks of all tuyeres of the blast furnace and liquid level data of the tuyeres; collecting the hydrogen content in the top gas of the blast furnace; collecting carbon monoxide and carbon dioxide content in blast furnace top gas; counting the fuel ratio of each shift, continuously producing the blast furnace, dividing 24 hours into a plurality of time periods, wherein each time period is one shift, and generally dividing 3 shifts: 8 a.m.: 00 to 16 pm: 00 pm 16:00 to 24:00, 0 in the morning: 00 to 8 am: 00;
s2: data analysis and water leakage judgment:
condition 1: the water supplementing period is smaller than the normal water supplementing period, and the air port liquid level is lower than the normal range by more than 0.3 m; the normal tuyere expansion tank needs to be supplemented with water for a period of time to ensure production due to leakage of the pipe valve, and the normal water supplementing period is in a stable data, and the size of the normal tuyere expansion tank is related to the volume of the blast furnace;
condition 2: the hydrogen content in the blast furnace top gas is more than 4.0 percent;
condition 3: gas utilization rate eta co The gas utilization rate is reduced by 1 to 2 percentco 2 Represents the carbon dioxide content in the blast furnace top gas, and co represents the carbon monoxide content in the blast furnace top gas;
condition 4: the current shift fuel ratio is higher than the previous shift fuel ratio by more than 5 kg/t;
if the conditions 1-4 are all met, judging that the blast furnace tuyere leaks water;
s3: positioning a water leakage air port:
condition a: measuring the inlet flow rate difference of cooling water of each air port, wherein the inlet flow rate difference of cooling water is more than 10m 3 /h；
Condition b: measuring the temperature per minute at the tuyere cooling wall, wherein the standard deviation of 60 data per 1 hour is greater than 30;
condition c: calculating the air flow fluctuation times of the cooling wall of the air port, wherein the air flow fluctuation times are more than 1;
and (3) meeting one of the conditions a, b and c, judging that the tuyere leaks water, positioning the position of the leaking water tuyere, and performing field inspection.
Preferably, the air port liquid level in the condition 1 is lower than the normal range of 0.3-0.6m.
Preferably, the hydrogen content in the condition 2 is more than 4.0% and less than 6%.
Preferably, the fuel ratio is a ratio of a sum of a pulverized coal consumption amount and a coke consumption amount to a molten iron yield.
Preferably, the current shift fuel ratio in said condition 4 is 5-20kg/t higher than the last shift fuel ratio.
Preferably, the airflow fluctuation times are obtained by calculating temperature data through a moving average algorithm.
The utility model provides a monitored control system for positioning method that blast furnace tuyere leaked, includes data acquisition module, data analysis module and data display module, data acquisition module and data display module are connected with data analysis module respectively, data acquisition module includes level gauge, chromatograph, flowmeter and thermocouple temperature sensor, the level gauge is installed on wind gap expansion tank and wind gap, the chromatograph is installed on the blast furnace roof, the flowmeter is installed on cooling water import and export pipeline, thermocouple temperature sensor is installed on the wind gap cooling wall, data display module is used for receiving data of data analysis module and shows in real time.
Preferably, the data analysis module adopts a singlechip, and the data display module adopts a display screen.
The beneficial effects are that: according to the implementation process of judging water leakage and then positioning water leakage, the accuracy can be effectively improved, unnecessary resource waste is reduced, and the method is more scientific and efficient; judging and combining four conditions, so as to prevent misjudgment; the whole use can reduce the manual work, improves work efficiency, when the wind gap was damaged, whether the wind gap leaked in the discovery very first time, thereby in time change the stability of guaranteeing the furnace condition, is fit for extensive popularization.
Drawings
FIG. 1 is a tuyere liquid level data map;
FIG. 2 is a graph of hydrogen content data;
FIG. 3 is a graph of gas utilization data;
FIG. 4 is a map of fuel ratio data;
FIG. 5 is a plot of tuyere flow differential data No. 3;
FIG. 6 is a plot of tuyere flow differential data No. 15;
FIG. 7 is a graph of the number of air flow fluctuations for a stave thermocouple No. 1;
FIG. 8 is a graph of the number of times the airflow fluctuates for a stave thermocouple No. 10.
Detailed Description
The invention will be described in further detail with reference to the accompanying drawings and specific preferred embodiments.
In the description of the present invention, it should be understood that the terms "left", "right", "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and "first", "second", etc. do not indicate the importance of the components, and thus are not to be construed as limiting the present invention. The specific dimensions adopted in the present embodiment are only for illustrating the technical solution, and do not limit the protection scope of the present invention.
Example 1:
the invention provides a technical scheme, a positioning method for water leakage of a blast furnace tuyere, which comprises the following steps:
a positioning method for water leakage of a blast furnace tuyere comprises the following steps:
s1, data acquisition: collecting liquid level data of expansion tanks of all tuyeres of the blast furnace and liquid level data of the tuyeres; collecting the hydrogen content in the top gas of the blast furnace; collecting carbon monoxide and carbon dioxide content in blast furnace top gas; counting the fuel ratio of each shift;
s2: data analysis and water leakage judgment:
condition 1: the water supplementing period is smaller than the normal water supplementing period, and the air port liquid level is lower than the normal range by more than 0.3 m;
condition 2: the hydrogen content in the blast furnace top gas is more than 4.0 percent;
condition 3: gas utilization rate eta co The gas utilization rate is reduced by 1 to 2 percentco 2 Represents the carbon dioxide content in the blast furnace top gas, and co represents the carbon monoxide content in the blast furnace top gas;
condition 4: the current shift fuel ratio is higher than the previous shift fuel ratio by more than 5 kg/t;
if the conditions 1-4 are all met, judging that the blast furnace tuyere leaks water;
s3: positioning a water leakage air port:
condition a: measuring the inlet flow rate difference of cooling water of each air port, wherein the inlet flow rate difference of cooling water is more than 10m 3 /h；
Condition b: measuring the temperature per minute at the tuyere cooling wall, wherein the standard deviation of 60 data per 1 hour is greater than 30;
condition c: calculating the air flow fluctuation times of the cooling wall of the air port, wherein the air flow fluctuation times are more than 1;
and (3) meeting one of the conditions a, b and c, judging that the tuyere leaks water, positioning the position of the leaking water tuyere, and performing field inspection.
Further, the tuyere liquid level in the condition 1 is lower than the normal range of 0.3-0.6m.
Further, the hydrogen content in the condition 2 is more than 4.0% and less than 6%.
Further, the fuel ratio is a ratio of a sum of a pulverized coal consumption amount and a coke consumption amount to a molten iron yield.
Further, the current shift fuel ratio in the condition 4 is 5-20kg/t higher than the last shift fuel ratio.
Further, the airflow fluctuation times are obtained by calculating temperature data through a moving average algorithm.
Example 2:
the monitoring system comprises a data acquisition module, a data analysis module and a data display module, wherein the data acquisition module and the data display module are respectively connected with the data analysis module, the data acquisition module comprises a liquid level meter, a chromatographic analyzer, a flowmeter and a thermocouple temperature sensor, the liquid level meter is arranged on an air port expansion tank and an air port, the chromatographic analyzer is arranged on a blast furnace top, the flowmeter is arranged on a cooling water inlet and outlet pipeline, the thermocouple temperature sensor is arranged on an air port cooling wall, and the data display module is used for receiving data of the data analysis module and displaying the data in real time.
Further, the data analysis module adopts a singlechip, and the data display module adopts a display screen.
Example 3:
referring to fig. 1-8, the present invention provides a technical solution, based on examples 1 and 2, of a 5800 blast furnace made of sand steel, which has 40 tuyeres, and 10-12 days 09 in 2020, the following problems are shown in the data: 1. the water replenishing period is shortened, as shown in figure 1;2. the H2 content of the furnace roof is more than 4 percent, as shown in figure 2;3. the gas utilization rate is reduced, see figure 3;4. the fuel ratio increases, see fig. 4; and comprehensively judging to obtain water leakage.
Obtained by displaying data in which the difference between the flow rates of the 15 and 30 tuyere bodies reaches 10m 3 Above/h, wherein FIG. 5 is an example of a data graph of the normal flow rate difference of the No. 3 tuyere, and FIG. 6 is a data graph of the flow rate difference of the No. 15 tuyere, which shows that the tuyere flow rate difference reaches 13m 3 And/h, checking on site to find out water stain in the No. 15 tuyereThrough field verification, after the No. 13 wind repair, two wind inlets are found to leak water, and the No. 15 wind inlet and the No. 30 wind inlet are respectively confirmed;
meanwhile, the number of air flow fluctuations at the cooling walls of the No. 15 and No. 30 tuyeres (cooling wall thermocouple nos. 1 and 10) was greater than 1, see fig. 7 and fig. 8, and the water leakage at the No. 15 and No. 30 tuyeres was determined by on-site verification.
While the present invention has been described in detail through the foregoing description of the preferred embodiment, it should be understood that the foregoing description is not to be considered as limiting the invention. Many modifications and substitutions of the present invention will become apparent to those of ordinary skill in the art upon reading the foregoing. Within the technical conception scope of the invention, a plurality of equivalent changes can be carried out on the technical proposal of the invention, and the equivalent changes belong to the protection scope of the invention.
Claims (6)
1. A positioning method for water leakage of a blast furnace tuyere is characterized by comprising the following steps of: the method comprises the following steps:
s1, data acquisition: collecting liquid level data of expansion tanks of all tuyeres of the blast furnace and liquid level data of the tuyeres; collecting the hydrogen content in the top gas of the blast furnace; collecting carbon monoxide and carbon dioxide content in blast furnace top gas; counting the fuel ratio of each shift;
s2: data analysis and water leakage judgment:
condition 1: the water supplementing period is smaller than the normal water supplementing period, and the air port liquid level is lower than the normal range by more than 0.3 m;
condition 2: the hydrogen content in the blast furnace top gas is more than 4.0 percent;
condition 3: gas utilization rate eta co The gas utilization rate is reduced by 1 to 2 percent，co 2 Represents the carbon dioxide content in the blast furnace top gas, and co represents the carbon monoxide content in the blast furnace top gas;
condition 4: the current shift fuel ratio is higher than the previous shift fuel ratio by more than 5 kg/t;
if the conditions 1-4 are all met, judging that the blast furnace tuyere leaks water;
s3: positioning a water leakage air port:
condition a: measuring the inlet flow rate difference of cooling water of each air port, wherein the inlet flow rate difference of cooling water is more than 10m 3 /h；
Condition b: measuring the temperature per minute at the tuyere cooling wall, wherein the standard deviation of 60 data per 1 hour is greater than 30;
condition c: calculating the air flow fluctuation times of the cooling wall of the air port, wherein the air flow fluctuation times are more than 1;
and (3) meeting one of the conditions a, b and c, judging that the tuyere leaks water, positioning the position of the leaking water tuyere, and performing field inspection.
2. The method for positioning water leakage at a tuyere of a blast furnace according to claim 1, wherein: the air port liquid level in the condition 1 is lower than the normal range by 0.3-0.6m.
3. The method for positioning water leakage at a tuyere of a blast furnace according to claim 1, wherein: the hydrogen content in the condition 2 is more than 4.0% and less than 6%.
4. The method for positioning water leakage at a tuyere of a blast furnace according to claim 1, wherein: the fuel ratio is the ratio of the sum of the coal dust consumption and the coke consumption to the molten iron yield.
5. The method for positioning water leakage at a tuyere of a blast furnace according to claim 1, wherein: the current shift fuel ratio in said condition 4 is 5-20kg/t higher than the previous shift fuel ratio.
6. The method for positioning water leakage at a tuyere of a blast furnace according to claim 1, wherein: and calculating temperature data by adopting a sliding average algorithm to obtain the airflow fluctuation times.
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| CN202210441342.1A CN114836588B (en) | 2022-04-25 | 2022-04-25 | Positioning method and monitoring system for water leakage of blast furnace tuyere |
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| CN202210441342.1A CN114836588B (en) | 2022-04-25 | 2022-04-25 | Positioning method and monitoring system for water leakage of blast furnace tuyere |
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| CN114836588B true CN114836588B (en) | 2023-11-14 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101775454A (en) * | 2010-01-19 | 2010-07-14 | 北京首钢自动化信息技术有限公司 | Blast-furnace tuyere leakage monitoring and alarming system |
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| CN106929620A (en) * | 2017-04-12 | 2017-07-07 | 河钢股份有限公司承德分公司 | A kind of apparatus and method that accurate leakage detection is carried out to blast furnace tuyere small sleeve |
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2022
- 2022-04-25 CN CN202210441342.1A patent/CN114836588B/en active Active
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