CN118064660A - Method for judging water leakage position of cold water wall of blast furnace - Google Patents
Method for judging water leakage position of cold water wall of blast furnace Download PDFInfo
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- CN118064660A CN118064660A CN202311749011.5A CN202311749011A CN118064660A CN 118064660 A CN118064660 A CN 118064660A CN 202311749011 A CN202311749011 A CN 202311749011A CN 118064660 A CN118064660 A CN 118064660A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 121
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000001816 cooling Methods 0.000 claims abstract description 60
- 239000008234 soft water Substances 0.000 claims abstract description 8
- 230000001502 supplementing effect Effects 0.000 claims abstract description 8
- 238000002474 experimental method Methods 0.000 claims description 3
- 239000003034 coal gas Substances 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 239000000498 cooling water Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000000446 fuel Substances 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000011819 refractory material Substances 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000002826 coolant Substances 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000003211 malignant effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
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Abstract
The invention provides a method for judging the water leakage position of a cold water wall of a blast furnace, which comprises the following steps: 1) Observing the water supplementing quantity of the soft water system, wherein the water supplementing quantity of a blast furnace for 24 hours exceeds the normal loss quantity of a cooling system by more than 2 tons, or coal gas escapes from an exhaust valve of the soft water system, and primarily judging that a cooling wall is damaged; 2) Closing the water inlet valve and the water outlet valve of the cooling wall, wherein if the water outlet pressure is not changed within 5min, the water pipe corresponding to the cooling wall is not leaked, and if the water outlet pressure is reduced within 5min, the water pipe corresponding to the cooling wall is leaked; 3) The water inlet pipe of the water leakage cooling wall is connected with the transparent rubber pipe, the transparent rubber pipe is filled with water, and the height at which the water level is stable and does not drop any more is the position corresponding to the breakage of the water pipe of the cooling wall. The invention can accurately judge whether the water cooling wall is damaged or not, accurately find the specific position of the water leakage cooling wall, and timely take stable and reliable measures to avoid serious accidents caused by large water leakage of the cooling wall into the blast furnace.
Description
Technical Field
The invention relates to the technical field of steel smelting, in particular to a method for judging the water leakage position of a cold water wall of a blast furnace.
Background
In the production process of the blast furnace, a large amount of heat is generated by the reaction in the furnace, the surface working temperature of the refractory material in the furnace reaches more than 1500 ℃, if cooling equipment is not arranged, the refractory material can be corroded or worn in a short time, and the furnace shell of the blast furnace can exceed the critical working temperature of 80 ℃ through heat transfer, so that a cooling wall is arranged between the furnace shell and a furnace lining, and the cooling medium is effectively controlled, the service life of the refractory material can be prolonged, reasonable operation furnace type can be maintained by adjusting the temperature and flow of the cooling medium, and in the production of the blast furnace, the severe fluctuation of the heat load, the scouring of the coal gas flow and the abrasion of the furnace burden can all cause the damage of the cooling wall, the cooling water inside the cooling wall can flow into the blast furnace, the stability of the blast furnace gas flow can be influenced, the increase of the fuel ratio and the reduction of the slag iron temperature can be caused, and the stable running of the blast furnace can be simultaneously damaged.
Patent document of application number 202123238501.8 discloses a blast furnace cooling wall leak source location structure, including the cooling wall, the multiunit the cooling wall is placed side by side, and all is provided with the connecting pipe between the cooling wall, and is adjacent all establish ties through the connecting pipe between the cooling wall, fixed mounting has discharge valve on the connecting pipe, and the last transparent hose that is provided with of discharge valve, and the minimum intercommunication is provided with the inlet tube on the cooling wall, and the internally mounted of inlet tube has the inlet tube ball valve, and the top intercommunication has the outlet pipe on the cooling wall, and outlet pipe internally mounted has the outlet pipe ball valve. The utility model has simple and quick operation, can position the leakage point of the cooling wall in normal production, does not need to additionally modify a cooling system, takes only about 1 minute in the whole leakage point positioning process, has accurate leakage point positioning, adopts the principle of a U-shaped pipe communicating vessel, does not need to be judged by experience in the whole process, and completely depends on scientific principle basis. However, the cooling wall has a large overall area, so that the cooling water pipeline therein is composed of a plurality of groups of pipelines, and the structure cannot find the position of the leakage point on the premise that the group of damaged pipelines cannot be determined. In addition, the above structure cannot determine whether the stave is damaged or leaked under the condition of normal production.
Disclosure of Invention
The invention aims to provide a method for judging the water leakage position of a cold water wall of a blast furnace, which can accurately judge whether the cold water wall is damaged or not, accurately find the specific position of the water leakage cold wall, timely take stable and reliable measures, and avoid a large amount of water leakage of the cold wall into the blast furnace, thereby causing malignant accidents.
In order to achieve the above purpose, the invention is realized by adopting the following technical scheme:
A method for judging the water leakage position of a cold water wall of a blast furnace comprises the following steps:
1) Firstly, observing the water supplementing quantity of a soft water system, and if the water supplementing quantity of a blast furnace for 24 hours exceeds the normal loss quantity of a cooling system by more than 2 tons, or gas escapes from an exhaust valve of the soft water system, primarily judging that the cooling wall of the blast furnace is damaged;
2) And (3) carrying out pressure maintaining experiments on the water pipe of the cooling wall: closing a water inlet valve and a water outlet valve of the cooling wall, then observing a pressure gauge arranged at the water outlet pipe, if the water outlet pressure does not change within 5min, the water pipe corresponding to the cooling wall is free from water leakage, and if the water outlet pressure drops within 5min, the water pipe corresponding to the cooling wall is free from water leakage;
3) And (2) connecting the water inlet pipe of the water leakage cooling wall detected in the step (2) with a transparent rubber pipe, vertically arranging the transparent rubber pipe and the water cooling wall at the same height, then filling the transparent rubber pipe with water, observing the water level of the transparent rubber pipe, and when the water level is stable, obtaining the position corresponding to the breakage of the water pipe of the cooling wall at the height which does not fall any more.
The diameter of the transparent rubber tube is DN20mm-30mm.
And a valve is arranged at the joint of the transparent rubber tube and the cold water wall water inlet pipe.
Compared with the prior art, the invention has the beneficial effects that:
The invention can accurately judge whether the water cooling wall is damaged, can effectively judge the specific position of the water leakage of the cooling wall, adopts reliable measures in a targeted way, and can avoid serious accidents such as fluctuation of air flow, reduction of hearth temperature, poor slag iron fluidity, great increase of fuel ratio, furnace cooling and the like caused by that a large amount of high-pressure cooling water enters the blast furnace.
Drawings
FIG. 1 is a schematic view of the transparent hose connection of the present invention.
In the figure: 1-transparent rubber tube, 2-water filling port, 3-valve, 4-connecting tube, 5-inlet tube, 6-outlet tube, 7-cooling wall, 8-water inlet direction, 9-water outlet direction, 10-water inlet valve, 11-water outlet valve.
Description of the embodiments
The following is a further description of embodiments of the invention, in conjunction with examples.
The specific position of the water leakage of the cooling wall of the blast furnace is judged according to the following steps, and reliable measures can be taken in a targeted way, so that serious accidents such as air flow fluctuation, hearth temperature reduction, slag iron fluidity deterioration, great increase of fuel ratio, furnace cooling and the like caused by entering of a large amount of high-pressure cooling water into the blast furnace are avoided.
A plurality of groups of cooling water pipelines are arranged in the cooling wall 7, and each group of pipelines is longitudinally arranged. The bottom of each group of cooling water pipelines is provided with a cooling wall water inlet pipe 5, the upper end of each group of cooling water pipelines is provided with a cooling wall water outlet pipe 6, a water inlet valve 10 is arranged on the water inlet pipe 5, and a water outlet valve 11 is arranged on the water outlet pipe 6.
A method for judging the water leakage position of a cold water wall of a blast furnace comprises the following steps:
1) Firstly, observing the water supplementing quantity of a soft water system, and if the water supplementing quantity of a blast furnace for 24 hours exceeds the normal loss quantity of a cooling system by more than 2 tons, or gas escapes from an exhaust valve of the soft water system, primarily judging that the cooling wall of the blast furnace is damaged;
2) And (3) carrying out pressure maintaining experiments on the water pipe of the cooling wall: closing a water inlet valve 10 and a water outlet valve 11 of the cooling wall, then observing a pressure gauge arranged at the water outlet pipe 6, if the water outlet pressure does not change within 5min, the water pipe corresponding to the cooling wall is free from water leakage, and if the water outlet pressure drops within 5min, the water pipe corresponding to the cooling wall is free from water leakage;
3) And (2) connecting the water inlet pipe 5 of the water leakage cooling wall detected in the step (2) with the transparent rubber pipe 1, vertically arranging the transparent rubber pipe 1 and the water cooling wall at the same height, then filling the transparent rubber pipe 1 with water, observing the water level of the transparent rubber pipe 1, and when the water level is stable, obtaining the position corresponding to the breakage of the water pipe of the cooling wall at the height which does not drop.
The pipe diameter of the transparent rubber pipe 1 is N25mm. The transparent rubber tube 1 is connected with a water inlet tube 5 of the water leakage cold water wall through a connecting tube 4, and a valve 3 is arranged on the connecting tube 4. When connecting the connecting pipe 4, the water inlet valve 10 is closed, when filling water, the valve 3 is opened, and after filling, the water inlet valve 10 and the water outlet valve 11 are opened.
The invention is successfully applied to all blast furnaces in the north-nutrient iron-making total plant of the saddle steel group basic steel group. The fuel ratio was reduced by 2 kg per ton of iron compared to the past production.
Claims (3)
1. The method for judging the water leakage position of the cold water wall of the blast furnace is characterized by comprising the following steps:
1) Observing the water supplementing quantity of the soft water system, and primarily judging that the cooling wall of the blast furnace is damaged if the water supplementing quantity of the blast furnace for 24 hours exceeds the normal loss quantity of the cooling system by more than 2 tons or if gas escapes from an exhaust valve of the soft water system;
2) And (3) carrying out pressure maintaining experiments on the water pipe of the cooling wall: closing a water inlet valve and a water outlet valve of the cooling wall, then observing a pressure gauge arranged at the water outlet pipe, if the water outlet pressure does not change within 5min, the water pipe corresponding to the cooling wall is free from water leakage, and if the water outlet pressure drops within 5min, the water pipe corresponding to the cooling wall is free from water leakage;
3) And (2) connecting the water inlet pipe of the water leakage cooling wall detected in the step (2) with a transparent rubber pipe, vertically arranging the transparent rubber pipe and the water cooling wall at the same height, then filling the transparent rubber pipe with water, observing the water level of the transparent rubber pipe, and when the water level is stable, obtaining the position corresponding to the breakage of the water pipe of the cooling wall at the height which does not fall any more.
2. The method for judging the water leakage position of the cold water wall of the blast furnace according to claim 1, wherein the diameter of the transparent rubber tube is DN20mm-30mm.
3. The method for judging the water leakage position of the cold water wall of the blast furnace according to claim 1, wherein a valve is arranged at the joint of the transparent rubber tube and the water inlet pipe of the cold water wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311749011.5A CN118064660A (en) | 2023-12-19 | 2023-12-19 | Method for judging water leakage position of cold water wall of blast furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311749011.5A CN118064660A (en) | 2023-12-19 | 2023-12-19 | Method for judging water leakage position of cold water wall of blast furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118064660A true CN118064660A (en) | 2024-05-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311749011.5A Pending CN118064660A (en) | 2023-12-19 | 2023-12-19 | Method for judging water leakage position of cold water wall of blast furnace |
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| CN (1) | CN118064660A (en) |
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2023
- 2023-12-19 CN CN202311749011.5A patent/CN118064660A/en active Pending
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