CN111518975A - Blast furnace tuyere small sleeve damage monitoring method and system - Google Patents
Blast furnace tuyere small sleeve damage monitoring method and system Download PDFInfo
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- CN111518975A CN111518975A CN202010549386.7A CN202010549386A CN111518975A CN 111518975 A CN111518975 A CN 111518975A CN 202010549386 A CN202010549386 A CN 202010549386A CN 111518975 A CN111518975 A CN 111518975A
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- 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
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/16—Tuyéres
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Abstract
The invention discloses a blast furnace tuyere small sleeve damage monitoring method, which comprises the following steps: acquiring the water inlet flow and the water outlet flow of the tuyere small sleeve cooling water; calculating the difference value between the water inlet flow and the water outlet flow to obtain a flow difference; and judging whether the flow difference is within a preset range, and if not, judging that the tuyere small sleeve is abnormal. In the method for monitoring the damage of the tuyere small sleeve of the blast furnace, a flow monitoring method is adopted, namely whether the flow through an inlet and an outlet is abnormal or not is judged, whether the tuyere small sleeve is damaged or not is judged, and the method is more visual and more accurate through flow monitoring and can better reflect the damage condition of the tuyere small sleeve. In conclusion, the blast furnace tuyere small sleeve damage monitoring method can effectively solve the problem that the tuyere small sleeve is poor in use monitoring effect. The invention also discloses a blast furnace tuyere small sleeve damage monitoring system.
Description
Technical Field
The invention relates to the technical field of blast furnaces, in particular to a blast furnace tuyere small sleeve damage monitoring method and a blast furnace tuyere small sleeve damage monitoring system.
Background
In the current blast furnace smelting, the most vulnerable and frequent part of the blast furnace cooling system is the tuyere small sleeve. Therefore, the monitoring work of the tuyere small sleeve becomes the central importance in the monitoring work of the blast furnace cooling system. The principle of the traditional tuyere small sleeve monitoring method is mainly that the water temperature difference is increased to serve as a judgment basis. The outlet water temperature is reduced to the inlet water temperature to be the water temperature difference, the operation standard specifies that when the tuyere small sleeve water temperature difference is greater than 3 ℃, the detection system gives an alarm, and after the alarm, a post person arrives at the tuyere platform to comprehensively judge whether the tuyere small sleeve is damaged or not through the following operations: 1. observing whether water flows out from the junction of the tuyere small sleeve and the two sleeves; 2. observing whether air bubbles exist at the water outlet of the tuyere small sleeve or not to generate the phenomenon of' breathing; 3. observing whether obvious water flow exists or not through a sight hole of the air pipe; 4. and after water is repeatedly reduced and added, the working condition of the tuyere small sleeve is observed through the sight hole again.
Monitoring methods based on water temperature differences have certain disadvantages. The defects that when the tuyere small sleeve is damaged, the heat flow intensity is not changed greatly, the water temperature difference is not obviously increased, and the problem that the monitoring system alarms and fails to report exists at the early stage of the damage of the tuyere small sleeve. The other disadvantage is that the temperature difference of water rises due to other factors (such as falling of slag crust) besides damage of the tuyere small sleeve, and false alarm exists in alarm of a monitoring system.
In conclusion, how to effectively solve the problem of poor use monitoring effect of the tuyere small sleeve is a problem which needs to be solved urgently by the technical personnel in the field at present.
Disclosure of Invention
In view of the above, a first object of the present invention is to provide a method for monitoring the damage of a small tuyere jacket of a blast furnace, which can effectively solve the problem of poor monitoring effect of the small tuyere jacket, and a second object of the present invention is to provide a system for monitoring the damage of the small tuyere jacket of the blast furnace.
In order to achieve the first object, the invention provides the following technical scheme:
a blast furnace tuyere small sleeve damage monitoring method comprises the following steps:
acquiring the water inlet flow and the water outlet flow of the tuyere small sleeve cooling water;
calculating the difference value between the water inlet flow and the water outlet flow to obtain a flow difference;
and judging whether the flow difference is within a preset range, and if not, judging that the tuyere small sleeve is abnormal.
In the blast furnace tuyere small sleeve damage monitoring method, after the tuyere small sleeve in a working state is monitored, the water inlet flow and the water outlet flow of a cooling water channel of the tuyere small sleeve are continuously obtained, the difference value between the inlet flow and the water outlet flow is obtained in real time, and whether the tuyere small sleeve is abnormal is judged according to whether the change of the flow difference value exceeds a preset range or not. In the method for monitoring the damage of the tuyere small sleeve of the blast furnace, a flow monitoring method is adopted, namely whether the flow through an inlet and an outlet is abnormal or not is judged, whether the tuyere small sleeve is damaged or not is judged, and the method is more visual and more accurate through flow monitoring and can better reflect the damage condition of the tuyere small sleeve. In conclusion, the blast furnace tuyere small sleeve damage monitoring method can effectively solve the problem that the tuyere small sleeve is poor in use monitoring effect.
Preferably, the predetermined range is a difference value between the water inlet flow and the water outlet flow of the tuyere small sleeve in a normal working state.
Preferably, before the determining whether the flow difference is within a predetermined range, the method further includes the following steps:
and continuously acquiring a difference range between the water inlet flow and the water outlet flow of the tuyere small sleeve when the tuyere small sleeve is in a normal working state, and taking the difference range as a preset range.
Preferably, the method comprises the following steps:
replacing a flowmeter in the tuyere small sleeve for detecting the water inlet flow or the water outlet flow;
and continuously acquiring a difference range between the water inlet flow and the water outlet flow of the tuyere small sleeve when the tuyere small sleeve is in a normal working state, and taking the difference range as a preset range.
Preferably, the judging that the tuyere small sleeve is abnormal is as follows: an alarm signal is generated outwards.
In order to achieve the second object, the invention also provides a blast furnace tuyere small sleeve damage monitoring system, which comprises a water inlet flow meter arranged at the water inlet end of the tuyere small sleeve cooling water and a water outlet flow meter arranged at the water outlet end; and the controller can acquire the measured values of the water inlet flowmeter and the water outlet flowmeter in real time to calculate the flow difference, judge whether the flow difference is within a preset range, and judge that the tuyere small sleeve is abnormal if the flow difference is not within the preset range. The blast furnace tuyere small sleeve damage monitoring system adopts the blast furnace tuyere small sleeve damage monitoring method. The blast furnace tuyere small sleeve damage monitoring method has the technical effects, so the blast furnace tuyere small sleeve damage monitoring system adopting the blast furnace tuyere small sleeve damage monitoring method also has corresponding technical effects.
Preferably, the predetermined range is a difference value between the water inlet flow and the water outlet flow of the tuyere small sleeve in a normal state.
Preferably, the air inlet device further comprises an alarm to give an alarm signal when the controller judges that the air inlet small sleeve is abnormal.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic flow chart of a blast furnace tuyere small sleeve damage monitoring method provided by an embodiment of the present invention.
Detailed Description
The embodiment of the invention discloses a method for monitoring the damage of a tuyere small sleeve of a blast furnace, which aims to effectively solve the problem of poor use monitoring effect of the tuyere small sleeve.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic flow chart of a method for monitoring breakage of a blast furnace tuyere small sleeve according to an embodiment of the present invention.
In an embodiment, the present embodiment provides a method for monitoring breakage of a tuyere small sleeve of a blast furnace, which is mainly used for monitoring whether a cooling water channel of the tuyere small sleeve of the blast furnace is broken. The specific convenient damage monitoring of the blast furnace tuyere small sleeve comprises the following steps:
step 100: and obtaining the water inlet flow and the water outlet flow of the tuyere small sleeve cooling water.
The method mainly comprises the steps of detecting through a flow meter at the water inlet end and a flow meter at the water outlet end of a cooling water channel of a tuyere small sleeve to respectively obtain the water inlet flow and the water outlet flow. It should be noted that, the monitoring method of the present application is to monitor the damage condition of the tuyere small sleeve of the blast furnace in the working state, and accordingly, obtaining the inlet water flow and the outlet water flow of the cooling water of the tuyere small sleeve refers to the working state.
Step 200: and calculating the difference value of the water inlet flow and the water outlet flow to obtain the flow difference.
And (3) calculating the difference value of the water inlet flow and the water outlet flow obtained in the step (100) to obtain the flow difference. The inflow rate detected as above is Q1The water outlet flow is Q2Then correspondingly, the flow rate difference between the two is △ a ═ Q2-Q1It should be noted that, in general, under an objective condition, in which the water inflow and the water outflow are approximately equal, △ a is generally zero, but even Q may occur due to measurement errors of the flow meter2Greater than Q1. Thus it is saidIt should be noted that, in the context of the present invention, when the tuyere small sleeve is normally operated, the tuyere small sleeve is in a normal operation state, that is, the tuyere small sleeve is considered to be in a non-damaged state
Step 200: and judging whether the flow difference is within a preset range, and if not, judging that the tuyere small sleeve is abnormal.
As described above, when the cooling system of the tuyere small sleeve normally operates, the Δ a generates a small fluctuation within a small range, and the fluctuation range of the Δ a at this time can be regarded as the above-mentioned predetermined range. It should be noted that the predetermined range may be an accurate range obtained through multiple experiments, or may be estimated, for example, when the current measured flow difference exceeds the current predetermined range, that is, after it is determined that the tuyere small sleeve is abnormal, at this time, whether a problem occurs in the tuyere small sleeve is actually detected, and when a problem does not occur in the tuyere small sleeve actually detected, the current predetermined range may be continuously corrected, that is, the endpoint value of the current predetermined range is expanded to include the current measured flow difference. Therefore, the predetermined range mainly means that the tuyere small sleeve is intact within the range, it should be noted that the flow difference value change caused by the general groove is larger than the flow difference value caused by the measurement error, so the predetermined range can be well defined, and as the accuracy of the flowmeter is improved, the corresponding predetermined range is smaller.
In the blast furnace tuyere small sleeve damage monitoring method, after the tuyere small sleeve in a working state is monitored, the water inlet flow and the water outlet flow of a cooling water channel of the tuyere small sleeve are continuously obtained, the difference value between the inlet flow and the water outlet flow is obtained in real time, and whether the tuyere small sleeve is abnormal is judged according to whether the change of the flow difference value exceeds a preset range or not. In the method for monitoring the damage of the tuyere small sleeve of the blast furnace, a flow monitoring method is adopted, namely whether the flow through an inlet and an outlet is abnormal or not is judged, whether the tuyere small sleeve is damaged or not is judged, and the method is more visual and more accurate through flow monitoring and can better reflect the damage condition of the tuyere small sleeve. In conclusion, the blast furnace tuyere small sleeve damage monitoring method can effectively solve the problem that the tuyere small sleeve is poor in use monitoring effect.
As described above, different tuyere stock, the corresponding predetermined ranges may be different. Based on this, the preferred predetermined range is the difference between the inlet flow and the outlet flow of the current tuyere small sleeve in the normal state. How to obtain the water inlet flow and the water outlet flow of the current tuyere small sleeve in the normal working state specifically can be before judging whether the flow difference is within a preset range, and the method further comprises the following steps: and continuously acquiring a difference range between the water inlet flow and the water outlet flow of the tuyere small sleeve when the tuyere small sleeve is in a normal working state, and taking the difference range as a preset range. The continuous operation is generally data in the preset time length during the initial operation, and the tuyere small sleeve can be accurately known to be not damaged and be in a working state in the preset time length. More specifically, the difference between the currently acquired difference range and the last acquired difference range is not large, that is, within the allowable range, the tuyere small sleeve is still considered to be in normal operation at the moment.
As described above, the size of the predetermined range affects the accuracy of the determination, and the determination of the predetermined range is limited by the flow meter. The higher the accuracy of the flow meter, the smaller the predetermined range, so to ensure that the predetermined range is in a smaller state, the predetermined range should correspond to the flow meter. In actual operation, the situation that the flowmeter needs to be replaced is often encountered, and based on the situation, the following steps are performed: and replacing the flowmeter in the tuyere small sleeve for detecting the water inflow or the water outflow. The following steps should also be carried out: and continuously acquiring a difference range between the water inlet flow and the water outlet flow of the tuyere small sleeve when the tuyere small sleeve is in a normal working state, and taking the difference range as a preset range. I.e., re-determining the predetermined range so that the current predetermined range corresponds to the current replaced flow meter to ensure that the predetermined range is more accurate.
As described above, when the tuyere small sleeve is judged to be abnormal, an alarm signal is generally sent out, and other reaction mechanisms such as stopping of the tuyere small sleeve and the like can also be adopted. But mainly sends out alarm signals outwards, such as sending out alarm light through a signal lamp or sending out alarm sound through an alarm. So that field worker can discover the tuyere small sleeve damage the first time, take measures to make the damaged part of the tuyere small sleeve form slag crust as early as possible, block up the damage notch, prevent cooling water from entering the hearth, guarantee the normal work of the tuyere small sleeve normal production of the blast furnace simultaneously, and avoid the tuyere small sleeve damage to cause the blast furnace damping down too much.
Based on the blast furnace tuyere small sleeve damage monitoring method provided in the embodiment, the invention also provides a blast furnace tuyere small sleeve damage monitoring system, which is arranged on a water inlet flow meter at the cooling water inlet end of the tuyere small sleeve and a water outlet flow meter at the water outlet end; and the controller can acquire the measured values of the water inlet flowmeter and the water outlet flowmeter in real time to calculate the flow difference, judge whether the flow difference is within a preset range, and judge that the tuyere small sleeve is abnormal if the flow difference is not within the preset range. Reference may be made to the above-described embodiments for the acquisition of the predetermined range. Because the blast furnace tuyere small sleeve damage monitoring system adopts the blast furnace tuyere small sleeve damage monitoring method in the embodiment, the blast furnace tuyere small sleeve damage monitoring system has the beneficial effects that the embodiment is referred to.
Further, the preset range can be the difference value between the water inlet flow and the water outlet flow of the tuyere small sleeve in a normal state.
Furthermore, the air inlet device can further comprise an alarm, so that an alarm signal is generated outwards when the controller judges that the air inlet small sleeve is abnormal. Specifically, a display can be further arranged to display the measurement condition of the flowmeter in real time, and when the detection result is changed greatly, the display is reminded to display.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A blast furnace tuyere small sleeve damage monitoring method is characterized by comprising the following steps:
acquiring the water inlet flow and the water outlet flow of the tuyere small sleeve cooling water;
calculating the difference value between the water inlet flow and the water outlet flow to obtain a flow difference;
and judging whether the flow difference is within a preset range, and if not, judging that the tuyere small sleeve is abnormal.
2. The blast furnace tuyere small sleeve breakage monitoring method according to claim 1, wherein the predetermined range is a difference between a water inlet flow rate and a water outlet flow rate of the tuyere small sleeve in a normal operation state.
3. The blast furnace tuyere small sleeve breakage monitoring method according to claim 1, further comprising, before said judging whether said flow rate difference is within a predetermined range, the steps of:
and continuously acquiring a difference range between the water inlet flow and the water outlet flow of the tuyere small sleeve when the tuyere small sleeve is in a normal working state, and taking the difference range as a preset range.
4. The blast furnace tuyere small sleeve breakage monitoring method according to claim 3, characterized by comprising the steps of:
replacing a flowmeter in the tuyere small sleeve for detecting the water inlet flow or the water outlet flow;
and continuously acquiring a difference range between the water inlet flow and the water outlet flow of the tuyere small sleeve when the tuyere small sleeve is in a normal working state, and taking the difference range as a preset range.
5. The method for monitoring the damage of the tuyere small sleeve of the blast furnace as claimed in claim 4, wherein said determining the abnormality of the tuyere small sleeve is: an alarm signal is generated outwards.
6. The utility model provides a blast furnace tuyere small cover breakage monitoring system which characterized in that includes following structure:
the water inlet flow meter is arranged at the water inlet end of the tuyere small sleeve cooling water, and the water outlet flow meter is arranged at the water outlet end;
and the controller can acquire the measured values of the water inlet flowmeter and the water outlet flowmeter in real time to calculate the flow difference, judge whether the flow difference is within a preset range, and judge that the tuyere small sleeve is abnormal if the flow difference is not within the preset range.
7. The blast furnace tuyere small sleeve breakage monitoring system according to claim 6, wherein the predetermined range is a difference between a water inlet flow rate and a water outlet flow rate of the tuyere small sleeve in a normal state.
8. The blast furnace tuyere small sleeve breakage monitoring system according to claim 7, further comprising an alarm to generate an alarm signal outward when the controller judges that the tuyere small sleeve is abnormal.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112458222A (en) * | 2020-10-30 | 2021-03-09 | 江阴兴澄特种钢铁有限公司 | Blast furnace tuyere small sleeve leakage detection device and leakage detection method |
| CN115161423A (en) * | 2022-08-05 | 2022-10-11 | 福建三钢闽光股份有限公司 | Leakage detection method for small sleeve in blast furnace tuyere |
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| CN112458222A (en) * | 2020-10-30 | 2021-03-09 | 江阴兴澄特种钢铁有限公司 | Blast furnace tuyere small sleeve leakage detection device and leakage detection method |
| CN115161423A (en) * | 2022-08-05 | 2022-10-11 | 福建三钢闽光股份有限公司 | Leakage detection method for small sleeve in blast furnace tuyere |
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Application publication date: 20200811 |