CN111392799A - Air-water separation method for blast furnace water drainage tank - Google Patents
Air-water separation method for blast furnace water drainage tank Download PDFInfo
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- CN111392799A CN111392799A CN202010218986.5A CN202010218986A CN111392799A CN 111392799 A CN111392799 A CN 111392799A CN 202010218986 A CN202010218986 A CN 202010218986A CN 111392799 A CN111392799 A CN 111392799A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 111
- 238000000926 separation method Methods 0.000 title claims abstract description 20
- 238000009434 installation Methods 0.000 claims description 3
- 230000003044 adaptive effect Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000012530 fluid Substances 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 17
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000112 cooling gas Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/10—Cooling; Devices therefor
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention discloses a blast furnace drainage tank gas-water separation method, which is characterized in that a drainage grid is arranged at a position higher than the normal working condition water level of an original drainage tank, a drainage pipe opening of the original drainage pipe is lifted upwards, and a plurality of drainage ports are uniformly formed at positions, close to the bottom surface of the drainage tank, of the drainage pipe opening, so that the rectification of fluid in the drainage tank is realized, the fluid flow field is changed, and the eddy current is reduced to reduce the capacity of water flow mixed with gas; meanwhile, the lower exhaust vertical pipe is additionally arranged to be communicated with the original exhaust vertical pipe, and other gas easily-gathering areas at the lower part of the drainage pipeline are connected into the lower exhaust vertical pipe, so that the first turning and other gas easily-gathering areas are communicated in series through the pipeline, and the gas discharge capacity of the drainage system is improved to the maximum extent. The invention makes full use of the basic theory of hydrodynamics to minimize the gas mixed in the water collection in the blast furnace drainage channel, thereby avoiding the influence on the production of the blast furnace and the potential safety hazard caused by the overflow of hot water in the drainage channel due to the insufficient gas-water separation capability of the drainage channel drainage system.
Description
Technical Field
The invention belongs to the technical field of blast furnace metallurgy, and relates to a method for separating water from water in a drainage tank in the process of iron and steel metallurgical blast furnace technology.
Background
The long-term stable forward running of the blast furnace is one of important evaluation indexes of the running state of the blast furnace, a blast furnace drainage trough is generally distributed at a corner position where a blast furnace air port platform does not influence the operation of the platform, and the space is limited, the blast furnace drainage trough is a unique collection path of cooling water drainage at the blast furnace air port, once the blast furnace drainage trough causes a hot water overflow accident due to unsmooth air-water separation, a large amount of hot water flows to a casting house platform with a fall of not less than 3m along the edge of the air port platform, if the hot water flows into a slag iron ditch in production, explosion is inevitable, and a serious accident of the blast furnace is caused, therefore, the production working condition of the drainage trough is improved, the overflow accident is avoided, and the drainage is particularly important, fig. 1 shows a traditional arrangement mode of the blast furnace drainage trough, an air port platform 1, a casting house platform 2 and an industrial drainage main pipe 5 are arranged from top to bottom, a drainage trough 3 is provided with through holes and drainage pipes 4, the top of the drainage pipe orifice of the drainage pipe 4 is provided with a drainage pipe 43 and is installed close to the drainage trough 3, the drainage pipe orifice of the drainage trough 3, the drainage main pipe 5 is communicated with an industrial drainage main pipe, the drainage pipe is communicated with the industrial drainage pipe, the drainage pipe body is arranged from the drainage pipe body of the drainage pipe, the top of the drainage pipe is arranged from the drainage pipe, the drainage pipe is arranged on the top of the drainage pipe, the drainage trough 3, the drainage pipe is gradually increased, the drainage pipe is a hot water collection of the drainage pipe, the drainage pipe is gradually increased, the drainage pipe is also when the hot water collection groove, the hot water collection of the hot water collection groove, the hot water collection groove is gradually, the hot water collection groove is not easily, the hot water collection groove is easily increased, the hot water collection groove is easily increased, the hot water collection groove is easily, the hot water collection groove is also when the hot water collection groove is easily, the hot water collection groove is not easily.
Disclosure of Invention
Aiming at the technical problem that gas accumulation is easy to occur in drainage pipelines of drainage channels in the background technology, so that water collection and drainage are not smooth, and further water collection and drainage are overflowed from the drainage channels to cause safety accidents, the invention provides the gas-water separation method for the blast furnace drainage channels, which makes full use of the basic theory of hydrodynamics, reduces the gas mixed in the water collection in the blast furnace drainage channels to the minimum, and avoids the influence on production of a blast furnace and the formation of potential safety hazards caused by the overflow of hot water in the drainage channels due to the insufficient gas-water separation capability of a drainage system of the drainage channels.
The technical scheme for solving the technical problem of the invention is as follows:
the invention relates to a blast furnace drainage tank gas-water separation method, wherein a tuyere platform, a cast house platform and an industrial drainage main pipe are arranged outside a blast furnace from top to bottom, a drainage tank is arranged at the tuyere platform, a through hole is formed in the bottom of the drainage tank, a drainage pipeline is installed at the bottom of the drainage tank, the top end of the drainage pipeline is a drainage pipe opening and is installed close to the bottom surface of the drainage tank, the lower end of the drainage pipeline is communicated with the industrial drainage main pipe, a first bend and a plurality of other gas easily-gathering areas are arranged on the upper part of the pipe body of the drainage pipeline, a grid is arranged at the drainage pipe opening, an exhaust vertical pipe is arranged at the first bend, the top of the exhaust vertical pipe is in an elbow shape, and the end of the exhaust vertical pipe extends into the drainage tank:
1) reducing the gas inclusion capacity of hot water; arranging a drainage grid at a position higher than the normal working condition water level of the original drainage tank; lifting the drain pipe mouth at the top end of the original drain pipe upwards and uniformly arranging a plurality of drain ports at the position where the drain pipe mouth of the drain pipe is close to the bottom surface of the drain tank;
2) the air exhaust capacity of the air exhaust vertical pipe is increased; the lower end of the original exhaust stand pipe is communicated with a lower exhaust stand pipe, a plurality of other gas easily-gathering areas at the lower part of the drainage pipeline are provided with exhaust holes and are connected to the lower exhaust stand pipe through pipelines, so that the first corner and the other gas easily-gathering areas are communicated in series through the pipelines, and the installation position of the original exhaust stand pipe can be changed in an adaptive manner according to the design requirements of the pipelines.
As a further improvement of the technical scheme of the invention, the drainage grille is 15-25 mm higher than the normal working condition water level of the drainage groove, and preferably 20mm higher than the normal working condition water level of the drainage groove.
As a further improvement of the technical scheme of the invention, the specification of the drainage grille is 10mm × 10 mm.
As a further improvement of the technical scheme of the invention, the top end of the original drainage pipeline is lifted upwards to a position 180-250 mm higher than the bottom surface of the drainage tank, preferably to a position 200mm higher than the bottom surface of the drainage tank.
As a further improvement of the technical scheme of the invention, the four water outlets are symmetrically arranged on the drainage pipeline close to the drainage tank, and the diameter of the four water outlets is 108 mm.
Compared with the prior art, the invention has the following advantages:
(1) the invention has small change to the original blast furnace water grate structure, good technical effect after modification, can effectively improve the gas-water separation capability of the drainage tank, greatly reduce the impurity content of cooling gas in the drainage pipeline, improve the production working condition of the drainage tank and avoid the occurrence of overflow accidents;
(2) the drainage grating with the specification of 10mm × 10mm is arranged at the position 20mm higher than the normal working condition water level of the traditional drainage groove, the drainage grating can play a role of rectifying when hot water is drained into the drainage groove, and certain gas is drained by depending on the contact surface of the open drainage groove and the atmosphere while the water speed is reduced;
(3) the drainage groove is an open container, and the drainage grating arranged above the water level under normal working conditions can play a role in isolating foreign matters;
(4) when the traditional drainage tank drains water, because a drainage pipe orifice is tightly attached to the bottom of the drainage tank, particularly, a vortex is easily formed at the drainage pipe orifice, the position of the drainage pipe orifice at the bottom of the drainage tank is raised, so that the drainage pipe orifice is 200mm higher than the bottom surface of the drainage tank, and meanwhile, 4 drainage ports with the diameter of 108mm are symmetrically arranged at the positions, front, back, left and right, of a drainage pipeline close to the bottom surface of the drainage tank, so that a fluid flow field in the drainage tank can be further changed, and the kinematic viscosity of hot water is increased by increasing the speed gradient, so that the gas mixing;
(5) the invention sets the lower exhaust vertical pipe on the basis of setting the exhaust vertical pipe at the first corner of the drainage pipeline of the traditional drainage tank, and sets the exhaust holes in other gas easily-gathered areas at the lower part of the drainage pipeline to be connected to the lower exhaust vertical pipe through the pipeline, and simultaneously, the lower exhaust vertical pipe is butted with the original exhaust vertical pipe, so as to optimize the exhaust arrangement mode of serially connecting each position on the basis of independently exhausting through the exhaust vertical pipe, increase the exhaust amount of gas in the drainage pipeline and further smoothly discharge collected water into the industrial drainage main pipe;
(6) the blast furnace water drainage tank gas-water separation method is also applicable to other related processes, and has strong practicability and high popularization value.
Drawings
FIG. 1 is a schematic view of a conventional blast furnace drainage trough arrangement;
FIG. 2 is a schematic top view of a conventional gutter and a conventional drain spout;
FIG. 3 is a schematic view showing the arrangement of a blast furnace drainage groove according to the present invention;
FIG. 4 is a schematic front view of a part of a drain tank and a drain pipe opening according to the present invention;
FIG. 5 is a top view of a portion of the drainage channel and the drainage pipe opening of the present invention;
in the figure: 1. a tuyere platform; 2. a cast house platform; 3. a water discharge tank; 4. a water discharge pipeline; 41. a first bend; 42. other gas accumulation areas; 43. a drain pipe orifice; 44. a water outlet; 5. an industrial main drain pipe; 6. a drainage grid; 7. a gas exhaust stand pipe; 8. a lower vent stack; 9. and (4) grid.
Detailed Description
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.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The terms "upper", "lower", "left", "right", "inner", "outer", and the like used in the specification and claims of the present disclosure are used only to indicate relative positional relationships, and when the absolute position of a described object is changed, the relative positional relationships are changed accordingly.
Taking a conventional blast furnace drainage trough as an example for illustration, as shown in fig. 1, which is a schematic diagram of a conventional blast furnace drainage trough, a tuyere platform 1, a cast house platform 2 and an industrial drainage main pipe 5 are arranged from top to bottom outside a blast furnace, elevations of the tuyere platform 1, the cast house platform 2 and the industrial drainage main pipe 5 are 14400mm, 10750mm and 6880mm respectively, a drainage trough 3 is arranged at the tuyere platform 1, a through hole is arranged at the bottom of the drainage trough 3 and a drainage pipe 4 with specification of D530 × 10 is installed, the top end of the drainage pipe 4 is a drainage pipe opening 43 and is installed close to the bottom surface of the drainage trough 3, a grid 9 is arranged at the drainage pipe opening 43, the lower end of the drainage pipe 4 is communicated with the industrial drainage main pipe 5 with specification of D720 × 10, a pipe body of the drainage pipe 4 is provided with a plurality of bends and gentle slopes when the collection water is arranged from top to top according to actual conditions of the blast furnace, a plurality of the collection water inlets of cooling water and impurities are easily mixed with the water in the collection water inlet elbow, the collection water inlet and the collection water outlet 4, the collection water inlet 3 is easily separated into the collection water outlet, the collection water outlet 3, the collection water outlet is easily separated into the collection water outlet, the collection water outlet 3, the collection water outlet of the collection water outlet 3, the collection water outlet is easily separated into the collection water outlet, the collection water outlet of the collection water inlet 3, the collection water outlet of the collection water inlet of the collection water outlet of the collection water inlet of the collection water outlet is easily separated from the collection water outlet of the collection water outlet, the collection water outlet of the collection water inlet of the collection water outlet of the collection water inlet of the furnace, the collection water inlet of the collection water outlet of the collection water inlet of the furnace, the collection water outlet of the collection water inlet of the collection water.
As shown in fig. 2, the conventional blast furnace drainage tank is improved, and the gas-water separation method of the blast furnace drainage tank of the present invention is characterized in that the gas-water separation method is completed by modifying various components of the conventional blast furnace drainage tank in fig. 1 as follows:
1) the method comprises the steps of arranging a drainage grille 6 with the specification of 10mm × mm at a position 15 mm-25 mm higher than the normal working condition water level of an original drainage groove 3, preferably 20mm higher than the normal working condition water level of the drainage groove 3, lifting a drainage pipe opening 43 at the top end of the original drainage pipe 4 upwards to a position 180 mm-250 mm, preferably 200mm, and uniformly arranging a plurality of drainage ports 44 at positions, close to the bottom surface of the drainage groove 3, of the drainage pipe opening 43 of the drainage pipe 4, wherein the four drainage ports 44 are provided with the diameter of 108mm and are symmetrically arranged front and back and left and right on the drainage pipe 4 close to the drainage groove 3;
2) the air exhaust capacity of the air exhaust vertical pipe is increased; the lower end of the original exhaust vertical pipe 7 is communicated with the lower exhaust vertical pipe 8, a plurality of other gas easily-gathering areas 42 at the lower part of the drainage pipeline 4 are provided with exhaust holes and are connected into the lower exhaust vertical pipe 8 through pipelines, so that the first turning part 41 and the other gas easily-gathering areas 4 are communicated in series through the pipelines, during setting, the installation position of the original exhaust vertical pipe 7 can be adaptively changed according to the design requirement of the pipeline, in addition, when the exhaust holes are formed in the other gas easily-gathering areas 42, the specific setting condition of the drainage pipeline can be realized, the exhaust pipe can be arranged at the position where gas gathering is most easily generated, the exhaust pipe can be arranged at a plurality of gas easily-gathering positions, the exhaust pipe is flexible to set, and the exhaust capacity of the drainage pipeline.
Claims (7)
1. A blast furnace drainage channel gas-water separation method is characterized in that a tuyere platform (1), a cast house platform (2) and an industrial drainage main pipe (5) are arranged outside a blast furnace from top to bottom, a drainage channel (3) is arranged at the tuyere platform (1), a through hole is formed in the bottom of the drainage channel (3), a drainage pipeline (4) is installed at the bottom of the drainage pipeline (4), a drainage pipe opening (43) is formed in the top of the drainage pipeline (4) and is installed close to the bottom of the drainage channel (3), the lower end of the drainage pipeline is communicated with the industrial drainage main pipe (5), a pipe body of the drainage pipeline is provided with a first turning part (41) and a plurality of other gas easily-gathering areas (42), a grid (9) is arranged at the drainage pipe opening (43), an exhaust vertical pipe (7) is arranged at the first turning part (41), the top of the exhaust vertical pipe (7) is in an elbow shape, and the end, the gas-water separation method is characterized by being completed by modifying the components as follows:
1) reducing the gas inclusion capacity of hot water; a drainage grille (6) is arranged at the position higher than the normal working condition water level of the original drainage groove (3); lifting the top end of the original drainage pipeline (4) upwards and uniformly arranging a plurality of drainage ports (44) at the positions, close to the bottom surface of the drainage groove (3), of drainage pipe openings (43) of the drainage pipeline (4);
2) the air exhaust capacity of the air exhaust vertical pipe is increased; the lower end of an original exhaust vertical pipe (7) is communicated with a lower exhaust vertical pipe (8), a plurality of other gas easily-gathering areas (42) at the lower part of a drainage pipeline (4) are provided with exhaust holes and are connected into the lower exhaust vertical pipe (8) through pipelines, so that a first turning part (41) and the other gas easily-gathering areas (42) are communicated in series through the pipelines, and the installation position of the original exhaust vertical pipe (7) can be changed in an adaptive manner according to the design requirements of the pipelines.
2. The blast furnace drainage tank gas-water separation method according to claim 1, wherein the drainage grid (6) is 15mm to 25mm higher than the normal working condition water level of the drainage tank (3).
3. The blast furnace drainage tank gas-water separation method according to claim 2, wherein the drainage grid (6) is 20mm higher than the normal working condition water level of the drainage tank (3).
4. The blast furnace drainage tank gas-water separation method as claimed in claim 1, wherein the size of the drainage grid (6) is 10mm × 10 mm.
5. The blast furnace drainage tank gas-water separation method as claimed in claim 1, wherein the top end of the original drainage pipeline (4) is raised upwards to a position 180-250 mm higher than the bottom surface of the drainage tank (3).
6. The blast furnace drainage tank gas-water separation method as claimed in claim 5, wherein the top end of the original drainage pipeline (4) is raised up to a position 200mm higher than the bottom surface of the drainage tank (3).
7. The blast furnace water grate water tank gas-water separation method according to any one of claims 1-6, wherein the four water outlets (44) are 108mm in diameter and are symmetrically arranged on the water discharge pipeline (4) close to the water discharge tank (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010218986.5A CN111392799A (en) | 2020-03-25 | 2020-03-25 | Air-water separation method for blast furnace water drainage tank |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010218986.5A CN111392799A (en) | 2020-03-25 | 2020-03-25 | Air-water separation method for blast furnace water drainage tank |
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| CN111392799A true CN111392799A (en) | 2020-07-10 |
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| CN202010218986.5A Pending CN111392799A (en) | 2020-03-25 | 2020-03-25 | Air-water separation method for blast furnace water drainage tank |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114735778A (en) * | 2022-05-07 | 2022-07-12 | 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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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2778948Y (en) * | 2005-01-25 | 2006-05-10 | 南京慧通工程技术有限公司 | Siphon water drain rain strainer |
| CN105821168A (en) * | 2016-05-13 | 2016-08-03 | 中冶华天南京工程技术有限公司 | Cooling sealing system |
| CN105838832A (en) * | 2016-06-12 | 2016-08-10 | 中冶华天南京工程技术有限公司 | Water supply and drainage and exhaust system of blast furnace |
| CN206360225U (en) * | 2016-11-23 | 2017-07-28 | 浙江盟大塑业有限公司 | A kind of hydrocone type roof drain |
| CN108264118A (en) * | 2018-01-10 | 2018-07-10 | 中冶华天工程技术有限公司 | Blast-furnace soft water expands degassing tank with constant-current type |
-
2020
- 2020-03-25 CN CN202010218986.5A patent/CN111392799A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2778948Y (en) * | 2005-01-25 | 2006-05-10 | 南京慧通工程技术有限公司 | Siphon water drain rain strainer |
| CN105821168A (en) * | 2016-05-13 | 2016-08-03 | 中冶华天南京工程技术有限公司 | Cooling sealing system |
| CN105838832A (en) * | 2016-06-12 | 2016-08-10 | 中冶华天南京工程技术有限公司 | Water supply and drainage and exhaust system of blast furnace |
| CN206360225U (en) * | 2016-11-23 | 2017-07-28 | 浙江盟大塑业有限公司 | A kind of hydrocone type roof drain |
| CN108264118A (en) * | 2018-01-10 | 2018-07-10 | 中冶华天工程技术有限公司 | Blast-furnace soft water expands degassing tank with constant-current type |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114735778A (en) * | 2022-05-07 | 2022-07-12 | 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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