CN110643765B - Online water-checking process for blast furnace cooling wall and water tank applied to process - Google Patents
Online water-checking process for blast furnace cooling wall and water tank applied to process Download PDFInfo
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- CN110643765B CN110643765B CN201910197857.XA CN201910197857A CN110643765B CN 110643765 B CN110643765 B CN 110643765B CN 201910197857 A CN201910197857 A CN 201910197857A CN 110643765 B CN110643765 B CN 110643765B
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- water
- water tank
- cooling wall
- blast furnace
- gas
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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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- 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
Abstract
The invention relates to an on-line water-checking process for a blast furnace cooling wall, which comprises the following process steps: according to the pressure in the blast furnace in the smelting state, closing a water inlet valve of the cooling wall to ensure that the water inlet pressure is less than the pressure in the blast furnace, butting a water outlet pipe of the cooling wall with a water tank, and enabling water in the cooling wall to flow into the water tank; observing whether a gas detector has a gas detection value or not in the process; when the water level in the water tank rises to the isolation plate, water in the water storage tank is gradually discharged, and meanwhile, a water outlet pipe of the cooling wall is disconnected with the water tank, so that pressure is released in the water tank; if the gas detector shows that the gas value is available, the fire species is introduced, and the discharged gas is combusted. Can be through looking for water to the stave under production state, can accurately judge whether there is the phenomenon of leaking in the stave, change the drawback that original looking for water relies on artificial experience to judge, improve the accuracy that blast furnace stave was looked for water on line.
Description
Technical Field
The invention belongs to the technical field of blast furnace detection, and relates to an online water-checking process for a cooling wall of a blast furnace and a water tank applied to the process.
Background
Blast furnace type structure, from outside to inside generally includes: the outer layer is made of a steel plate and is called as a furnace shell; a cooling wall is arranged in the furnace shell; building a layer of protective bricks in the cooling wall; and ramming materials are filled between each layer.
The blast furnace cooling wall is generally divided into more than 10 layers from the furnace bottom to the furnace throat, and dozens of cooling walls are arranged on each layer along the periphery of the furnace body, so that the structural sealing safety of the blast furnace body is ensured.
The cooling wall of the blast furnace adopts a cooling mode which mainly comprises the following steps: high-pressure cooling water is introduced into one end of the cooling wall, and the cooling water passes through an annular pipeline and a cavity in the cooling wall to take away heat energy generated by the cooling wall in a blast furnace smelting state, and then passes through a cooling wall water outlet pipe to discharge the cooling water to an external circulating water tank.
Under the blast furnace production state, when blast furnace stave leads to wearing to leak because of all kinds of reasons, because cooling water pressure is higher than furnace internal pressure, inside a large amount of water leaked into the blast furnace, very easily arouse the blast furnace serious accident such as cool, lead to blast furnace manufacturing cost to rise, simultaneously, inside a large amount of cooling water got into the blast furnace, with the contact of the interior high temperature material of stove, produced a large amount of high temperature steam, very easily arouse the phenomenon of knocking in the stove, seriously threaten blast furnace safety.
Under the prior art condition, professional personnel need to be regularly organized to carry out on-line water detection on the cooling wall of the blast furnace, and the existing water detection process is that the personnel are organized under the production state of the blast furnace, the water inflow of the cooling wall is adjusted, and whether the cooling wall leaks or not is judged by observing whether bubbles appear in the water or not according to the experience of the technical personnel. The cooling wall is inspected on line by means of personal experience of technicians, and due to different experiences of the technicians, the water inspection accuracy is low, erroneous judgment is easy to occur, the method is not scientific enough, and the manual labor intensity is high.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides the on-line water-checking process for the cooling wall of the blast furnace and the water tank applied to the process, which can accurately judge whether the cooling wall has a water leakage phenomenon or not by checking the water of the cooling wall in a production state, change the defect that the original water checking is judged by manual experience, and improve the accuracy of on-line water-checking for the cooling wall of the blast furnace.
The technical scheme adopted by the invention for solving the technical problems is as follows: an on-line water-checking process for a blast furnace cooling wall comprises the following process steps:
a) according to the pressure in the blast furnace in the smelting state, closing a water inlet valve of the cooling wall to ensure that the water inlet pressure is less than the pressure in the blast furnace, butting a water outlet pipe of the cooling wall with a water tank, and enabling water in the cooling wall to flow into the water tank;
b) judging whether the gas detector has a gas detection value in the observation process, if the gas detector has the gas value in the water storage process, judging that the cooling wall is penetrated and leaked, and if the gas detector does not have the gas value in the water storage process, judging that the cooling wall is not penetrated and leaked;
c) when the water level in the water tank rises to the isolation plate, the water in the water storage tank is gradually discharged, and meanwhile, the water outlet pipe of the cooling wall is disconnected with the water tank;
d) opening the pressure relief valve to relieve pressure in the water tank;
e) if the gas detector displays a gas value, introducing a fire seed into the ignition port before opening the pressure release valve, and burning the discharged gas; if the gas detector does not have a gas value, ignition is not needed in the pressure relief process.
Preferably, in the step a), the water inlet pressure of the cooling wall is less than the air pressure in the blast furnace by more than 50Kpa in the smelting state of the blast furnace, and the water inlet valve of the cooling wall is not completely closed.
Preferably, the cooling wall is communicated with the water inlet pipe through a water inlet valve.
Preferably, the water outlet pipe is provided with a water outlet valve.
Preferably, the drain valve is a ball valve.
Preferably, a metal pipe with the diameter of 20mm is connected to the rear end of the pressure relief valve, and an ignition port is arranged at the tail end of the metal pipe.
The utility model provides an use water tank at online water-logging technology of blast furnace stave, trompil on one side of the water tank, the trompil size is the same with stave outlet pipe size, install an division board additional in the water tank, trilateral tangent contact in division board and the water tank, division board height is followed under the water tank trompil, division board is cistern and air storage chamber in with the water tank, trompil below the air storage chamber, trompil department is equipped with the rubber tube water pipe that has installed the drain valve additional, the rubber tube water pipe bypasses division board UNICOM cistern, at a water tank wall installation coal gas monitor of division board top, at a monitor other water tank wall trompil installation relief valve.
Preferably, the bottom surface and the left and right side surfaces of the division plate rainwater tank are in tangential contact.
Preferably, the wall of the water tank is made of transparent toughened glass, and the precision of the gas detector is 1 ppm.
Preferably, the diameter of the rubber pipe water pipe is 30mm, the rubber pipe water pipe is in a door shape, one end of the rubber pipe water pipe is arranged in the opening, a drain valve is additionally arranged at the end of the rubber pipe water pipe, and the other end of the rubber pipe water pipe bypasses the isolation plate and is communicated with the reservoir.
The invention has the positive effects that: by controlling the water inlet pressure and flow of the cooling wall, when the water pressure in the cooling wall is lower than the internal pressure of the blast furnace, high-pressure gas in the blast furnace is transmitted to the leakage part of the cooling wall and then enters the gas storage chamber in the water tank, and the gas in the blast furnace is blast furnace gas and is in contact with a gas detector arranged on the water tank, so that a corresponding gas concentration value can be displayed, the leakage state of the cooling wall can be judged according to the gas concentration value, the cooling wall is inspected for water in a production state, whether the water leakage phenomenon exists on the cooling wall can be accurately judged, the defect that the original water inspection is judged by means of manual experience is overcome, and the accuracy of online water inspection of the cooling wall of the blast furnace is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
FIG. 1 is a schematic structural view of the present invention;
in the figure: 1-water inlet pipe, 2-cooling wall, 3-water outlet valve, 4-water outlet pipe, 5-water tank, 6-water storage tank, 7-pressure release valve, 8-water discharge valve, 9-detector, 10-isolation plate, 11-rubber pipe water pipe, 12-air storage chamber, and 13-ignition port.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
Example one
Referring to fig. 1: an on-line water-checking process for a cooling wall 2 of a blast furnace comprises the following process flows:
a) the wall of the tank is made of toughened glass, and a sealed portable water tank 5 is manufactured, wherein the length of the water tank 5 is 1000mm, the height of the water tank is 500mm, and the width of the water tank is 500 mm; a hole is formed at the position of 420mm height on one side of the water tank 5, and the diameter of the hole is 50mm which is the same as that of the water outlet pipe 4 of the cooling wall 2; a partition plate 10 is additionally arranged in the water tank 5, the partition plate 10 is in tangential contact with three surfaces in the water tank 5, the height of the partition plate 10 is 420mm, the partition plate 10 divides the interior of the water tank 5 into a water storage tank 6 and an air storage chamber 12, and the volume of the water storage tank 6 and the air storage chamber 12 is 4: 1. A hole is formed below the gas storage chamber 12, the diameter of the hole is 30mm, a drain valve 8 is additionally arranged, the valve is a ball valve, a rubber pipe water pipe 11 is led to the hole and communicated with the water storage tank 6 through a separation plate 10, and the diameter of the rubber pipe water pipe 11 is 30 mm. A gas detector 9 is arranged on the water tank 5 above the isolation plate 10, and the precision of the portable gas detector 9 is 1 ppm; a round hole with the diameter of 20mm is formed in the water tank 5 beside the detector 9, a pressure release valve 7 is installed, the pressure release valve 7 is a ball valve, a metal pipe with the diameter of 20mm is led behind the pressure release valve 7, and the tail end of the metal pipe is provided with an ignition port 13.
b) The on-line water-checking process comprises the following steps: in the smelting state of the blast furnace, the pressure in the furnace is 400KPa, the water inlet pressure of the cooling wall 2 is 1200KPa, the water inlet valve of the cooling wall 2 is closed to ensure that the water inlet pressure is 300KPa, the water outlet pipe 4 of the cooling wall 2 is butted with the water tank 5, and the water outlet of the cooling wall 2 flows into the water tank 5.
c) When the water storage of the water tank 5 is started, the gas detector 9 displays that the gas detection value is 42ppm, when the water level of the water tank 5 reaches the partition plate 10, the gas concentration of the gas storage chamber 12 in the water tank 5 is increased, the gas detector 9 measures that the gas concentration is gradually increased to 223ppm, and the cooling wall 2 penetrates and leaks.
d) The drain valve 8 is opened to gradually drain the water in the reservoir 6 while the outlet pipe 4 of the stave cooler 2 is disconnected from the tank 5.
e) And (3) leading a fire to the ignition port 13, opening the pressure release valve 7 to release the pressure in the water tank 5, and burning the coal gas discharged from the ignition port 13.
Preferably, the partition plate 10 is in tangential contact with the bottom surface and the left and right side surfaces of the water tank 5.
Preferably, the wall of the water tank 5 is made of transparent toughened glass, and the precision of the gas detector 9 is 1 ppm.
Preferably, the rubber tube water pipe is in a door shape, one end of the rubber tube water pipe is arranged in the opening, a drain valve 8 is additionally arranged at the end of the rubber tube water pipe, and the other end of the rubber tube water pipe bypasses a partition plate 10 and is communicated with the reservoir 6.
Preferably, the cooling wall is communicated with the water inlet pipe 1 through a water inlet valve.
Preferably, the water outlet pipe 4 is provided with a water outlet valve 3.
Example two
b) In the smelting state of the blast furnace, the pressure in the furnace is 408KPa, the water inlet pressure of the cooling wall 2 is 1200KPa, the water inlet valve of the cooling wall 2 is closed to make the water inlet pressure 320KPa, the water outlet pipe 4 of the cooling wall 2 is butted with the water tank 5, and the water outlet of the cooling wall 2 flows into the water tank 5.
c) When the water storage of the water tank 5 is started, the gas detector 9 displays that the gas detection value is 0ppm, when the water level of the water tank 5 reaches the isolation plate 10, the gas detector 9 detects that the gas value is 0ppm, and the cooling wall 2 does not leak.
d) The drain valve 8 is opened to gradually drain the water in the reservoir 6 while the outlet pipe 4 of the stave cooler 2 is disconnected from the tank 5.
e) The relief valve 7 is opened to release the pressure in the water tank 5.
The use effect is as follows: through looking for water to stave 2 under production state, can accurately judge whether stave 2 has the phenomenon of leaking, change the drawback that original looking for water relies on artificial experience to judge, improved the accuracy of online looking for water of blast furnace stave 2.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent replacements, improvements, etc. within the principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The on-line water-checking process of the cooling wall of the blast furnace is characterized in that a water tank of the on-line water-checking process of the cooling wall of the blast furnace is used, one side of the water tank is provided with a hole, the size of the hole is the same as that of a water outlet pipe of the cooling wall, a separation plate is additionally arranged in the water tank and is in tangential contact with three surfaces in the water tank, the height of the separation plate reaches the lower edge of the hole of the water tank, the separation plate divides the water tank into a reservoir and an air storage chamber, the hole is formed below the air storage chamber, a rubber pipe water pipe provided with a drain valve is arranged at the hole, the rubber pipe water pipe bypasses the separation plate and is communicated with the reservoir, a gas monitor is arranged on the wall of the water tank above the separation plate, and a pressure release valve is arranged on the wall of the water tank beside the gas monitor;
the on-line water-checking process comprises the following steps:
a) according to the pressure in the blast furnace in the smelting state, closing a water inlet valve of the cooling wall to ensure that the water inlet pressure is less than the pressure in the blast furnace, butting a water outlet pipe of the cooling wall with a water tank, and enabling water in the cooling wall to flow into the water tank;
b) the gas in the water tank is concentrated in the gas storage chamber, whether a gas detection value exists in the gas detector in the observation process is judged, if the gas detection value exists in the gas detector in the water storage process, the cooling wall is judged to be penetrated and leaked, and if the gas detection value does not exist in the gas detector in the water storage process, the cooling wall is judged to be not penetrated and leaked;
c) when the water level in the water tank rises to the isolation plate, the water in the water storage tank is gradually discharged, and meanwhile, the water outlet pipe of the cooling wall is disconnected with the water tank;
d) opening the pressure relief valve to relieve pressure in the water tank;
e) if the gas detector displays a gas value, introducing a fire seed into the ignition port before opening the pressure release valve, and burning the discharged gas; if the gas detector does not have a gas value, ignition is not needed in the pressure relief process.
2. The on-line water-checking process for the cooling wall of the blast furnace as claimed in claim 1, wherein: in the step a), the water inlet pressure of the cooling wall is less than the air pressure in the blast furnace by more than 50KPa in the smelting state of the blast furnace, and the water inlet valve of the cooling wall is not closed completely.
3. The on-line water-checking process for the cooling wall of the blast furnace as claimed in claim 1, wherein: the cooling wall is communicated with the water inlet pipe through a water inlet valve.
4. The on-line water-checking process for the cooling wall of the blast furnace as claimed in claim 1, wherein: and a water outlet valve is arranged on the water outlet pipe.
5. The on-line water-checking process for the cooling wall of the blast furnace as claimed in claim 1, wherein: the drain valve is a ball valve.
6. The on-line water-checking process for the cooling wall of the blast furnace as claimed in claim 1, wherein: the rear end of the pressure release valve is connected with a metal pipe with the diameter of 20mm, and the tail end of the metal pipe is provided with an ignition port.
7. The water tank applied to the online water detection process of the blast furnace cooling wall as claimed in claim 1, is characterized in that: the water tank one side trompil, the trompil size is the same with the stave outlet pipe size, install an division board additional in the water tank, trilateral tangent contact in division board and the water tank, division board height is followed down to the water tank trompil, the cistern is cut apart into with the water tank to the division board, trompil in the gas storage chamber below, trompil department is equipped with the rubber tube water pipe of having installed the drain valve additional, the rubber tube water pipe bypasses division board UNICOM's cistern, a coal gas monitor is installed to water tank wall above the division board, at the other water tank wall trompil installation relief valve of monitor.
8. The water tank as claimed in claim 7, wherein: the division plate is contacted with the bottom surface and the left and right side surfaces of the water tank in a tangent mode.
9. The water tank as claimed in claim 8, wherein: the wall of the water tank is made of transparent toughened glass, and the precision of the gas detector is 1 ppm.
10. The water tank as claimed in claim 8, wherein: the diameter of the rubber tube water pipe is 30mm, the rubber tube water pipe is in a door shape, one end of the rubber tube water pipe is arranged in the open hole, a drain valve is additionally arranged at the end of the rubber tube water pipe, and the other end of the rubber tube water pipe bypasses the isolation plate and is communicated with the reservoir.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910197857.XA CN110643765B (en) | 2019-03-15 | 2019-03-15 | Online water-checking process for blast furnace cooling wall and water tank applied to process |
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| CN201910197857.XA CN110643765B (en) | 2019-03-15 | 2019-03-15 | Online water-checking process for blast furnace cooling wall and water tank applied to process |
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| CN110643765A CN110643765A (en) | 2020-01-03 |
| CN110643765B true CN110643765B (en) | 2022-01-11 |
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| CN114735778B (en) * | 2022-05-07 | 2023-04-07 | 柳州钢铁股份有限公司 | Industrial cooling water and coal gas separation treatment method for cooling wall of blast furnace |
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| JP4122716B2 (en) * | 2001-02-19 | 2008-07-23 | Ｊｆｅスチール株式会社 | Damage detection method and apparatus for blast furnace cooling equipment |
| CN202007242U (en) * | 2011-02-12 | 2011-10-12 | 宝山钢铁股份有限公司 | Leak hunting device for water cooling cooler of blast furnace |
| CN103642961A (en) * | 2013-12-27 | 2014-03-19 | 新余钢铁集团有限公司 | Leak detector for blast furnace cooler |
| CN104726628A (en) * | 2015-04-08 | 2015-06-24 | 马钢(集团)控股有限公司 | Online blast furnace cooling stave leakage detection device and detection method thereof |
| CN105200177A (en) * | 2014-06-25 | 2015-12-30 | 金流阀门（上海）有限公司 | Positioning leak detection instrument for blast furnace cooling water |
| CN205861289U (en) * | 2016-06-20 | 2017-01-04 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Blast furnace cooling device leakage detection apparatus |
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2019
- 2019-03-15 CN CN201910197857.XA patent/CN110643765B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4122716B2 (en) * | 2001-02-19 | 2008-07-23 | Ｊｆｅスチール株式会社 | Damage detection method and apparatus for blast furnace cooling equipment |
| CN202007242U (en) * | 2011-02-12 | 2011-10-12 | 宝山钢铁股份有限公司 | Leak hunting device for water cooling cooler of blast furnace |
| CN103642961A (en) * | 2013-12-27 | 2014-03-19 | 新余钢铁集团有限公司 | Leak detector for blast furnace cooler |
| CN105200177A (en) * | 2014-06-25 | 2015-12-30 | 金流阀门（上海）有限公司 | Positioning leak detection instrument for blast furnace cooling water |
| CN104726628A (en) * | 2015-04-08 | 2015-06-24 | 马钢(集团)控股有限公司 | Online blast furnace cooling stave leakage detection device and detection method thereof |
| CN205861289U (en) * | 2016-06-20 | 2017-01-04 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Blast furnace cooling device leakage detection apparatus |
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