CN110846452A - Device and method for searching leakage point of damaged cooling wall of blast furnace - Google Patents
Device and method for searching leakage point of damaged cooling wall of blast furnace Download PDFInfo
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- CN110846452A CN110846452A CN201911177742.0A CN201911177742A CN110846452A CN 110846452 A CN110846452 A CN 110846452A CN 201911177742 A CN201911177742 A CN 201911177742A CN 110846452 A CN110846452 A CN 110846452A
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- 238000001816 cooling Methods 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 189
- 239000007788 liquid Substances 0.000 claims abstract description 31
- 230000002159 abnormal effect Effects 0.000 claims abstract description 15
- 238000007664 blowing Methods 0.000 claims abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 16
- 229910052742 iron Inorganic materials 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000008234 soft water Substances 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 239000000498 cooling water Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 239000000741 silica gel Substances 0.000 claims description 4
- 229910002027 silica gel Inorganic materials 0.000 claims description 4
- 239000012209 synthetic fiber Substances 0.000 claims description 4
- 229920002994 synthetic fiber Polymers 0.000 claims description 4
- 239000002699 waste material Substances 0.000 claims description 3
- 238000013016 damping Methods 0.000 abstract description 7
- 238000012423 maintenance Methods 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 238000002347 injection Methods 0.000 abstract description 3
- 239000007924 injection Substances 0.000 abstract description 3
- 229910001335 Galvanized steel Inorganic materials 0.000 description 2
- 239000008397 galvanized steel Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
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- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention relates to a device and a method for searching a leakage point of a damaged cooling wall of a blast furnace, belonging to the technical field of blast furnace ironmaking in the metallurgical industry. The technical scheme is as follows: the blast furnace cooling wall is formed by connecting a plurality of series of cooling wall water pipes or water channels in series from bottom to top, and when the liquid level curve of the expansion tank is in an abnormal state, the leakage points of the blast furnace cooling wall water pipes or the water channels are shown. The invention has the beneficial effects that: the series of water leakage points of the cooling wall water pipe or the water channel can be found out when the blast furnace is not blowing down, and the cooling is maintained and the water leakage is reduced by adopting a 'water pouring' mode; when in damping down maintenance, the transparent rubber tube is used for connecting the series where the damaged water pipe or water channel is located, and the horizontal height of the damaged water pipe or water channel is detected by a water injection method, so that the accurate position of the leakage point of the cooling wall is determined. The method is accurate and reliable, convenient to operate, high in safety and intuition, and beneficial to overhaul and maintenance of the cooling wall and safe operation of the blast furnace.
Description
Technical Field
The invention relates to a device and a method for searching a leakage point of a damaged cooling wall of a blast furnace, belonging to the technical field of blast furnace ironmaking in the metallurgical industry.
Background
The cooling wall of the blast furnace is a cooling device arranged between the furnace shell and the furnace lining. A water pipe or a cavity water channel is arranged in the cooling wall, and water is introduced for cooling. At present, the cooling wall of a large-scale blast furnace adopts a soft water closed circulation cooling mode, a plurality of series of cooling wall water pipes or water channels are connected in series from bottom to top, and soft water flows from bottom to top. In the middle and later stages of blast furnace service, the cooling water pipe or water channel is damaged and leaks water occasionally, the long-time continuous water leakage causes frequent falling of furnace wall bonding substances, the furnace temperature fluctuation or the furnace cooling is caused, and when the water leakage is serious, the detonation in the furnace and the slag filling at the tuyere can occur, so that the safety production of the blast furnace is directly influenced.
At present, most blast furnaces search a cooling wall leakage point by adopting methods such as a water reducing method, an ignition method, a damping down and pressurizing positioning method and the like, but the methods have the following defects: (1) the water reducing method and the ignition method can be judged only by manual visual inspection or ignition after the coal gas overflows, so that the operation environment is unsafe; (2) the water reducing method and the ignition method can find out water leakage series water pipes, the height of a leakage point cannot be determined, a large amount of soft water is lost, and the operation steps are multiple; (3) the damping down and pressing method cannot determine the accurate height of the leakage point; (4) the damping down and pressurizing positioning method needs to add a set of temporary pressure-resistant pipeline and a connecting device, and leakage is detected only after damping down, so that the control treatment of water leakage is delayed, and the production safety of the blast furnace is influenced.
Disclosure of Invention
The invention aims to provide a device and a method for searching a leakage point of a damaged cooling wall of a blast furnace, which can search the series of the leakage points of a water pipe of the cooling wall when the blast furnace is not stopped, maintain cooling by adopting a 'water pouring' mode and reduce the water leakage amount; when the cooling wall is in damping down maintenance, the horizontal height of the damaged water pipe is detected through a water injection method, so that the accurate position of a leakage point of the cooling wall is determined, and the problems in the background technology are solved.
The technical scheme of the invention is as follows:
the utility model provides a seek device of blast furnace damage stave leak source, contains transparent rubber tube, funnel and iron wire, and the funnel passes through iron wire fixed connection on transparent rubber tube, transparent rubber tube is synthetic fiber silica gel material.
A method for searching leakage points of a damaged cooling wall of a blast furnace is characterized in that the cooling wall of the blast furnace is formed by connecting a plurality of series of cooling wall water pipes or water channels in series from bottom to top, each series of water pipes or water channels of the cooling wall is provided with a water inlet valve, a water return valve, an accident water valve, a blow-down valve, an exhaust valve, an expansion tank and a liquid level meter, the accident water valve and the expansion tank are arranged on the water return pipe, and when the leakage points of the damaged cooling wall of the blast furnace are searched, the method is operated according to the:
firstly, observing a liquid level curve of the expansion tank, and when the liquid level curve of the expansion tank is in a normal state, indicating that a water pipe or a water channel of a cooling wall of the blast furnace has no leakage point; when the liquid level curve of the expansion tank is in an abnormal state, indicating that a leakage point occurs in a water pipe or a water channel of a cooling wall of the blast furnace;
secondly, when a leakage point occurs in a water pipe or a water channel of the cooling wall of the blast furnace, closing a water inlet valve and a water return valve of a series where the suspected water leakage pipe or the water channel is located, connecting an accident water rubber pipe to the accident water valve, opening the accident water valve, determining the series where the water leakage pipe or the water channel is located by adopting a 'water pouring' method, simultaneously opening a drain valve of the series of water pipes or the water channel, and adjusting the opening degree of the accident water valve to reduce the water leakage amount in the furnace and avoid the pollution and the waste of soft water;
thirdly, after the blast furnace stops blowing down, closing an accident water valve and a blow-down valve of the water leakage series water pipe or water channel, connecting one end of a transparent rubber pipe to an exhaust valve of the water leakage series water pipe or water channel, and fastening the transparent rubber pipe by using a steel wire to prevent water leakage; and connecting the other end of the transparent rubber tube with the funnel, then opening the exhaust valve, intermittently injecting water into the funnel, observing the water level change in the transparent rubber tube, and when the water level in the transparent rubber tube is at a certain height and is not changed, determining the height of the water level in the transparent rubber tube to be the accurate height of a water leakage series water pipe or a water channel leakage point.
The 'water pouring and passing' method in the second step is to utilize the accident water hose to pass water to the series where the suspected water leakage pipe or water channel is located, the direction of the water flow is opposite to the flow direction of cooling water in the normal cooling wall water pipe or water channel, in the process of passing water to the series where the suspected water leakage pipe or water channel is located, the liquid level curve of the expansion tank is observed, if the liquid level curve of the expansion tank is changed from an abnormal state to a normal state, the series where the suspected water leakage pipe or water channel is located is the water leakage series water pipe or water channel; if the expansion tank liquid level curve is always in an abnormal state, other series where the suspected water leakage pipes or water channels are located are sequentially checked until the abnormal state of the expansion tank liquid level curve is changed into a normal state.
The invention has the beneficial effects that: the series of water leakage points of the cooling wall water pipe or the water channel can be found out when the blast furnace is not blowing down, and the cooling is maintained and the water leakage is reduced by adopting a 'water pouring' mode; when in damping down maintenance, the transparent rubber tube is used for connecting the series where the damaged water pipe or water channel is located, and the horizontal height of the damaged water pipe or water channel is detected by a water injection method, so that the accurate position of the leakage point of the cooling wall is determined. The method is accurate and reliable, convenient to operate, high in safety and intuition, and beneficial to overhaul and maintenance of the cooling wall and safe operation of the blast furnace.
Drawings
FIG. 1 is a schematic structural view of a cooling wall series water pipe;
FIG. 2 is a schematic view of a curve of the expansion tank liquid level under normal conditions;
FIG. 3 is a schematic view of a liquid level curve of the expansion tank in an abnormal state;
FIG. 4 is a schematic diagram of accurately determining the height position of a missing dot.
In the figure: the device comprises a cooling wall 1, a furnace shell 2, a water inlet valve 3, a water return valve 4, an accident water valve 5, a blow-down valve 6, an exhaust valve 7, an expansion tank 8, a liquid level meter 9, a transparent rubber tube 10, a funnel 11 and a blast furnace center line K.
Detailed Description
The invention is further illustrated by way of example in the following with reference to the accompanying drawings.
Referring to the attached drawings 1-4, the device for searching the leakage point of the damaged cooling wall of the blast furnace comprises a transparent rubber tube 10, a funnel 11 and an iron wire, wherein the funnel 11 is fixedly connected to the transparent rubber tube 10 through the iron wire, and the transparent rubber tube 10 is made of synthetic fiber silica gel.
A method for searching leakage points of a damaged cooling wall of a blast furnace is characterized in that the cooling wall of the blast furnace is formed by connecting a plurality of series of cooling wall water pipes or water channels in series from bottom to top, each series of water pipes or water channels of the cooling wall is provided with a water inlet valve 3, a water return valve 4, an accident water valve 5, a blow-down valve 6, an exhaust valve 7, an expansion tank 8 and a liquid level meter 9, the accident water valve 5 and the expansion tank 8 are arranged on the water return pipe, and when the leakage points of the damaged cooling wall of the blast furnace are searched, the method is operated according to the following:
firstly, observing a liquid level curve of the expansion tank, and when the liquid level curve of the expansion tank is in a normal state, indicating that a water pipe or a water channel of a cooling wall of the blast furnace has no leakage point; when the liquid level curve of the expansion tank is in an abnormal state, indicating that a leakage point occurs in a water pipe or a water channel of a cooling wall of the blast furnace;
secondly, when a leakage point occurs in a water pipe or a water channel of the cooling wall of the blast furnace, closing a water inlet valve 3 and a water return valve 4 of a series where the suspicious water leakage pipe or the water channel is located, connecting an accident water rubber pipe to an accident water valve 5, opening the accident water valve 5, determining the series where the water leakage pipe or the water channel is located by adopting a 'water pouring' method, simultaneously opening a drain valve 6 of the series of water pipes or the water channel, and adjusting the opening degree of the accident water valve 5 to reduce the water leakage amount in the furnace and avoid the pollution and the waste of soft water;
thirdly, after the blast furnace stops blowing down, closing an accident water valve 5 and a blow-down valve 6 of the water leakage series water pipe or water channel, connecting one end of a transparent rubber tube 10 to an exhaust valve 7 of the water leakage series water pipe or water channel, and fastening by using a steel wire to prevent water leakage; the other end of the transparent rubber tube 10 is connected with the funnel 11, then the exhaust valve 7 is opened, water is intermittently injected into the funnel 10, the water level change in the transparent rubber tube 10 is observed, and when the water level in the transparent rubber tube 10 is at a certain height and is not changed, the height of the water level in the transparent rubber tube 10 is the accurate height of a water leakage series water pipe or a water channel leakage point.
The 'water pouring and passing' method in the second step is to utilize the accident water hose to pass water to the series where the suspected water leakage pipe or water channel is located, the direction of the water flow is opposite to the flow direction of cooling water in the normal cooling wall water pipe or water channel, in the process of passing water to the series where the suspected water leakage pipe or water channel is located, the liquid level curve of the expansion tank is observed, if the liquid level curve of the expansion tank is changed from an abnormal state to a normal state, the series where the suspected water leakage pipe or water channel is located is the water leakage series water pipe or water channel; if the expansion tank liquid level curve is always in an abnormal state, other series where the suspected water leakage pipes or water channels are located are sequentially checked until the abnormal state of the expansion tank liquid level curve is changed into a normal state.
In this embodiment, the transparent rubber tube 10 has a diameter of 20mm and a wall thickness of 3mm, is made of synthetic fiber silica gel, and has a length of 10-15 m. The diameter of the upper opening of the funnel 11 is 90mm, the outer diameter of the lower opening is 18mm, the material is galvanized steel plate (galvanized iron sheet), and the wall thickness is 0.5 mm. The iron wire is Q195 low carbon zinc-plating material, model number 18 (diameter 1.219 mm).
FIG. 2 is a schematic view of a liquid level curve of the expansion tank in a normal state, and FIG. 3 is a schematic view of a liquid level curve of the expansion tank in an abnormal state, wherein a vertical coordinate W is a water level and a horizontal coordinate t is time.
Referring to the attached figure 2, the slope of the expansion tank liquid level curve in the normal state is very small and is in a straight line state.
Referring to the attached figure 3, after the water pipe of the cooling wall leaks, the slope of the liquid level curve is obviously increased, and after the water leakage is detected by a water-closing method and the damaged water pipe series is 'poured' (the damaged water pipe series is isolated from a raw water system), the slope of the curve is restored to the original state.
Referring to the attached figure 4, a transparent rubber tube 10 is sleeved on an exhaust valve at the lower part of a suspicious height position in a damaged water tube series and is bound and fixed by a thin steel wire, the other end of the transparent rubber tube 10 is inserted into a funnel 11 made of a galvanized steel plate and is fastened by the thin steel wire and is lifted to a furnace body platform at the height of two sections of cooling walls, and then the transparent rubber tube is fixed on the furnace body platform by the thin steel wire; and opening an exhaust valve connected with the transparent rubber tube 10, adding water into the funnel intermittently, observing the water level change in the transparent rubber tube 10, and observing the horizontal position of the water level in the transparent rubber tube 10, namely the accurate height of the leakage point, because the water level of the leakage water finally falls to the height of the leakage point or does not rise after reaching the leakage point after the water level exceeds the height of the leakage point.
After the height position of the damaged water pipe or water channel is accurately judged, a corresponding scheme of independent water cooling, grouting plugging or point type cooler addition is selected according to the position (hot surface damage, pipe root shearing damage and the like) and the severity of the damaged water pipe or water channel, and the original undamaged water pipe or water channel adopts a cross-over connection mode to recover the cooling function.
Claims (3)
1. The utility model provides a look for blast furnace damages stave leak source which characterized in that: contain clear rubber tube (10), funnel (11) and iron wire, funnel (11) are through iron wire fixed connection on clear rubber tube (10), clear rubber tube (10) are synthetic fiber silica gel material.
2. The utility model provides a method for seeking blast furnace damages stave leak source, blast furnace stave is established ties from bottom to top by many series of stave water pipes or water course, all is equipped with water intaking valve (3), wet return valve (4), accident water valve (5), blowoff valve (6), discharge valve (7), expansion tank (8) and level gauge (9) on every series of water pipe of stave or water course, and accident water valve (5) and expansion tank (8) are established on the wet return, its characterized in that: when a leakage point of the damaged cooling wall of the blast furnace is searched, the operation is carried out according to the following steps:
firstly, observing a liquid level curve of the expansion tank, and when the liquid level curve of the expansion tank is in a normal state, indicating that a water pipe or a water channel of a cooling wall of the blast furnace has no leakage point; when the liquid level curve of the expansion tank is in an abnormal state, indicating that a leakage point occurs in a water pipe or a water channel of a cooling wall of the blast furnace;
secondly, when a leakage point occurs in a water pipe or a water channel of the cooling wall of the blast furnace, closing a water inlet valve (3) and a water return valve (4) of a series where the suspicious water leakage pipe or the water channel is located, connecting an accident water rubber pipe to an accident water valve (5), opening the accident water valve (5), determining the series where the water leakage pipe or the water channel is located by adopting a 'water pouring' method, simultaneously opening a drain valve (6) of the series of water pipes or the water channel, and adjusting the opening degree of the accident water valve (5) to reduce the water leakage amount and avoid the pollution and the waste of soft water;
thirdly, after the blast furnace stops blowing down, closing an accident water valve (5) and a blow-down valve (6) of the water leakage series water pipe or water channel, connecting one end of a transparent rubber tube (10) to an exhaust valve (7) of the water leakage series water pipe or water channel, and fastening by using a steel wire to prevent water leakage; the other end of the transparent rubber tube (10) is connected with the funnel (11), then the exhaust valve (7) is opened, water is intermittently injected into the funnel (10), the water level change in the transparent rubber tube (10) is observed, and when the water level in the transparent rubber tube (10) is not changed at a certain height, the height of the water level in the transparent rubber tube (10) is the accurate height of a water leakage series water pipe or a water channel leakage point.
3. The method for finding the leakage point of the damaged cooling wall of the blast furnace as claimed in claim 2, wherein: the 'water pouring and passing' method in the second step is to utilize the accident water hose to pass water to the series where the suspected water leakage pipe or water channel is located, the direction of the water flow is opposite to the flow direction of cooling water in the normal cooling wall water pipe or water channel, in the process of passing water to the series where the suspected water leakage pipe or water channel is located, the liquid level curve of the expansion tank is observed, if the liquid level curve of the expansion tank is changed from an abnormal state to a normal state, the series where the suspected water leakage pipe or water channel is located is the water leakage series water pipe or water channel; if the expansion tank liquid level curve is always in an abnormal state, other series where the suspected water leakage pipes or water channels are located are sequentially checked until the abnormal state of the expansion tank liquid level curve is changed into a normal state.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113122666A (en) * | 2021-04-20 | 2021-07-16 | 宝武集团鄂城钢铁有限公司 | Operation method for accurately positioning leakage point of blast furnace water-cooling wall |
| CN114836588A (en) * | 2022-04-25 | 2022-08-02 | 江苏沙钢集团有限公司 | Positioning method and monitoring system for water leakage of blast furnace tuyere |
| CN115305301A (en) * | 2022-08-12 | 2022-11-08 | 阳春新钢铁有限责任公司 | Method for detecting leakage of blast furnace soft water closed system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113122666A (en) * | 2021-04-20 | 2021-07-16 | 宝武集团鄂城钢铁有限公司 | Operation method for accurately positioning leakage point of blast furnace water-cooling wall |
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