CN114735778B - Industrial cooling water and coal gas separation treatment method for cooling wall of blast furnace - Google Patents
Industrial cooling water and coal gas separation treatment method for cooling wall of blast furnace Download PDFInfo
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- CN114735778B CN114735778B CN202210490316.8A CN202210490316A CN114735778B CN 114735778 B CN114735778 B CN 114735778B CN 202210490316 A CN202210490316 A CN 202210490316A CN 114735778 B CN114735778 B CN 114735778B
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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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
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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
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/02—Non-contaminated water, e.g. for industrial water supply
- C02F2103/023—Water in cooling circuits
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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
- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
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Abstract
The invention discloses a method for separating and treating industrial cooling water and coal gas of a cooling wall for a blast furnace, which relates to the field of smelting, and adopts a coal gas separation treatment device for the blast furnace to separate and treat the coal gas; the processing device comprises a box body internally provided with a first clapboard and a second clapboard; the second partition plate is sealed with the bottom of the box, a coarse grid filter screen is arranged at the upper part of the second partition plate, and the coarse grid filter screen is not contacted with the top of the box; the first clapboard is sealed with the top of the box, the lower part of the first clapboard is provided with a fine grid filter screen, and the fine grid filter screen is in contact connection with the bottom of the box; the top surface of the box body above the water inlet area is communicated with a water inlet; a gas delivery pipe is arranged at the top of the box close to or above the sedimentation area; the right side wall of the box body is provided with a water outlet, and the left side wall of the box body is provided with toughened glass. The invention can solve the problems that the industrial cooling water of the cooling wall of the blast furnace directly flows into the backwater collecting box, so that the coal gas concentration of the tuyere platform area is high, and the industrial cooling water of the cooling wall of the blast furnace contains more impurities, so that the industrial cooling water is polluted.
Description
Technical Field
The invention relates to the technical field of steel smelting, in particular to a treatment method for separating coal gas in industrial cooling water of a cooling wall for a blast furnace.
Background
The industrial cooling water is introduced after the water leakage of the cooling wall of the blast furnace, the industrial cooling water outlet is arranged at a small set of return water concentration box in the tuyere platform, the industrial cooling water of the cooling wall leaking at the present stage is directly discharged into the return water concentration box, the coal gas concentration in the tuyere platform area is up to more than 2000ppm, the coal gas is seriously discharged, a large risk is caused to the safe production of the blast furnace, the potential safety hazard is large, in order to reduce the coal gas concentration of the tuyere platform, a large axial flow fan is adopted for 24 hours to normally open and aim at the area for blowing and dispersing at present, the pollution and safety problems are not fundamentally solved, the power consumption is increased, and meanwhile, the impurities in the industrial cooling water of the leaking cooling wall are many, the industrial cooling water is polluted, and the reutilization of the industrial cooling water is not facilitated.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method for separating and treating industrial cooling water and coal gas of a cooling wall for a blast furnace, which can solve the problems that the industrial cooling water of the cooling wall of the blast furnace directly flows into a backwater collecting box, so that the coal gas concentration of a tuyere platform area is high, impurities in the industrial cooling water of the cooling wall of the blast furnace are more, the industrial cooling water is polluted, and the reutilization of the industrial cooling water is not facilitated.
In order to solve the problems, the technical scheme of the invention is as follows: the method for separating and treating the industrial cooling water and the coal gas of the cooling wall for the blast furnace adopts a coal gas separation treatment device for the blast furnace to separate and treat the coal gas in the industrial cooling water of the cooling wall for the blast furnace; the coal gas separation treatment device for the blast furnace comprises a cuboid box body, and two partition plates, namely a first partition plate and a second partition plate, are used for separating the box body into three areas: a water inlet area between the second partition plate and the left side wall of the box body, a settling area between the second partition plate and the first partition plate for filtration, and a water drainage area between the first partition plate and the right side wall of the box body; the second clapboard is sealed with the bottom of the box, the upper part of the second clapboard is provided with a coarse grating filter screen for water to pass through, and the coarse grating filter screen is not contacted with the top of the box; the first clapboard is sealed with the top of the tank, the lower part of the first clapboard is provided with a fine grid filter screen through which water passes, the fine grid filter screen is in contact connection with the bottom of the tank, the first clapboard plays a role in sealing and separating the gas, and the fine grid filter screen at the lower part of the first clapboard filters particulate matters in the water for the second time; a water inlet is arranged on the top surface of the box body above the water inlet area; a gas delivery pipe is arranged at the top of the box close to or above the sedimentation area; a water outlet is formed in the right side wall of the box body, and toughened glass is arranged on the left side wall of the box body; a fixed gas detector is arranged at the outlet of the gas delivery pipe and is used for monitoring the gas concentration; and the water outlet is provided with a flowmeter for monitoring the treated water yield, and the water yield of the water outlet is provided with a low-flow alarm value so as to indirectly monitor the damage change of the cooling wall and the water quantity of the industrial cooling water of the cooling wall. .
The separation treatment of the coal gas in the industrial cooling water of the cooling wall for the blast furnace comprises the following steps:
1) Installing the coal gas separation treatment device for the blast furnace at a proper position of a blast furnace tuyere platform on a production site;
2) A water inlet valve is arranged at the water inlet of the gas separation treatment device for the blast furnace, a drain valve is arranged at the water outlet, a drain valve is arranged at the drain outlet, and a gas outlet pipe is provided with a gas outlet valve;
3) Closing the blowdown valve and the water inlet valve, and opening the drain valve and the coal gas outlet valve;
4) Connecting the front end of the water inlet valve with a water outlet of industrial water of a water leakage cooling wall of the blast furnace; the gas leading-out pipe is connected with the separated gas collecting and processing device or a gas guide pipe leading to the top of the blast furnace;
5) Opening the water inlet valve, injecting the industrial water of the water leakage cooling wall for the blast furnace into the gas separation treatment device for the blast furnace, and observing whether the water inlet has a surge effect through the toughened glass, thereby indirectly judging the working condition of the cooling wall;
6) Monitoring the gas concentration through the fixed gas detector; monitoring the treated water yield through the flowmeter so as to indirectly monitor the damage change of the cooling wall and the water quantity and treatment effect of industrial cooling water of the cooling wall;
7) Collecting the separated coal gas to a treatment device, and then igniting the coal gas or performing other treatments, or diffusing the separated coal gas on the top of a blast furnace; leading out the filtered industrial cooling water of the water leakage cooling wall for the blast furnace from the water outlet to be used as new industrial cooling water;
8) And opening the drain valve regularly to drain each area of the gas separation treatment device for the blast furnace and clean and maintain the gas separation treatment device for the blast furnace.
In the above technical solution, a more specific solution is: the aperture of the coarse grid filter screen is 8 mm, and the aperture of the fine grid filter screen is 4 mm.
Further: the water outlet is arranged at a certain height, the height of the water outlet part of the water outlet is higher than the height of the second partition plate entity in the water tank, the height of the water outlet part of the water outlet is lower than the height of the coarse grating filter screen on the second partition plate, the effect of water-sealing coal gas is achieved, and the distance between the water outlet and the bottom of the water tank is larger than 200 mm.
Further: the box body has the overall dimensions of 1200 mm in length, 600 mm in width and 600 mm in height; the water inlet area, the sedimentation area and the water discharge area respectively occupy 600 mm, 220 mm and 360 mm in the length direction of the box body; the toughened glass has the length of 500 mm and the width of 200 mm.
Further: the diameters of the coal gas delivery pipe and the water outlet are both 150 mm; the diameters of 3 water inlets connected with the water inlet and 3 sewage outlets are 50 mm; the thickness of the first partition board 5 and the second partition board 9 is 10 mm.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following beneficial effects:
the invention skillfully utilizes the physical characteristics of the coal gas and the water to separate the coal gas from the industrial cooling return water in the water tank, effectively processes the coal gas under the condition of not increasing energy consumption, reduces the high coal gas potential safety hazard caused by direct discharge of industrial water of the cooling wall with water leakage of the tuyere platform, filters out particle impurities in the industrial water in the coal gas processing process, and effectively recycles the industrial water; the problems of high coal gas concentration, high potential safety hazard, pollution to industrial return water and the like in a blast furnace area caused by direct discharge of industrial water through the water leakage cooling wall are solved.
Drawings
FIG. 1 is a schematic front view of a gas separation treatment apparatus for a blast furnace according to the present invention;
FIG. 2 is a schematic plan view of a gas separation treatment apparatus for a blast furnace according to the present invention;
FIG. 3 is a schematic left view of a gas separation treatment apparatus for a blast furnace according to the present invention;
FIG. 4 is a schematic view showing the flow direction of water and gas in the gas separation treatment apparatus for a blast furnace.
The reference numbers in the figures denote:
1. a water inlet; 2. a box body; 3. a gas delivery pipe; 4. a coarse grid filter screen; 5. a first separator; 6. a water outlet; 7. a sewage draining outlet; 8. a fine grid filter screen; 9. a second separator; 10. and (4) tempering the glass. .
Detailed Description
The invention is further illustrated with reference to the following figures and examples:
the invention adopts a gas separation treatment device for the blast furnace to separate the gas in the industrial cooling water of the cooling wall for the blast furnace;
the gas separation treatment device for the blast furnace is shown in figures 1, 2 and 3, and comprises a rectangular box body 2, wherein the box body 2 is divided into three areas by a first partition plate 5 and a second partition plate 9: a water inlet area between the second partition plate 9 and the left side wall of the box body 2, a settling area between the second partition plate 9 and the first partition plate 5 for filtration, and a water discharge area between the first partition plate 5 and the right side wall of the box body 2; the second partition plate 9 is sealed with the bottom of the box, the upper part of the second partition plate is provided with a coarse grating filter screen 4 for water to pass through, the coarse grating filter screen 4 is not contacted with the top of the box, and the aperture of the coarse grating filter screen 4 is 8 mm; the second clapboard 9 plays a role of separating coal gas entering the industrial cooling water of the cooling wall in the box body, the coal gas and the water enter the box body together from the water inlet, most of the coal gas is separated from the water, the coal gas can move upwards to overflow the water surface after meeting the second clapboard 9, the coarse grid filter screen 4 on the upper part of the second clapboard 9 filters particulate matter impurities entering the box body for the first time, the first clapboard 5 is sealed with the top of the box, the lower part of the first clapboard 5 is provided with a fine grid filter screen 8 allowing the water to pass, the fine grid filter screen 8 is in contact connection with the bottom of the box, the aperture of the fine grid filter screen 8 is 4 mm, the first clapboard 5 plays a role of sealing and separating the coal gas, and the fine grid filter screen 8 on the lower part of the first clapboard 5 filters the particulate matter impurities in the water for the second time; a water inlet 1 is arranged on the top surface of the box body 2 above the water inlet area; a gas delivery pipe 3 is arranged at the top of the box close to or above the sedimentation area; the right side wall of the box body 2 is provided with a water outlet 6, the water outlet 6 is arranged at a certain height, the water outlet part of the water outlet 6 is higher than the solid height of a second partition plate 9 in the water tank, the water outlet part of the water outlet 6 is lower than the height of a coarse grating filter screen 4 on the second partition plate 9, the effect of sealing coal gas is guaranteed, the water surface is shown by a wave line in figures 1 and 3, the distance between the water outlet 6 and the bottom of the box body is more than 200 mm in the embodiment, the left side wall of the box body 2 is provided with toughened glass 10, the toughened glass 10 plays a role in observing the surge of the water inlet, when the water inlet has coal gas, the surge of the water inlet can occur, and the working condition of the cooling wall can be indirectly judged: no surging indicates that the damaged cooling wall is hung and solidified; surging occurs, broken cooling wall hanging slag falls off, and furnace gas enters the cooling wall and enters the water tank device from the water inlet; and sewage outlets 7 are arranged at the bottom of the water inlet area, the sedimentation area and the drainage area, so that dirt such as sediments and the like can be drained.
The overall dimension of the box body 2 of the embodiment is 1200 mm long, 600 mm wide and 600 mm high; the water inlet area, the sedimentation area and the water discharge area respectively occupy 600 mm, 220 mm and 360 mm in the length direction of the box body 2; the toughened glass 10 has the length of 500 mm and the width of 200 mm; the diameters of the coal gas eduction tube 3 and the water outlet 6 are both 150 mm; the connecting water inlets 1 are provided with 3 connecting water inlets, and the diameters of the water inlets communicated with the connecting water inlets and the 3 sewage outlets 7 are 50 mm; the first 5 and second 9 separators each have a thickness of 10 mm.
In order to better monitor the separation condition of industrial cooling water and coal gas of a cooling wall for a blast furnace and ensure the safe operation of various operations, a fixed coal gas detector is arranged at the outlet of a coal gas delivery pipe to monitor the concentration of the coal gas; the water outlet is provided with a flowmeter for monitoring the treated water outlet amount, and the water outlet amount of the water outlet is provided with a low-flow alarm value so as to indirectly monitor the damage change of the cooling wall and the water volume of industrial cooling water of the cooling wall (a fixed gas detector and the flowmeter are not shown in the figure).
As shown in fig. 4, the flow direction of water and gas in the gas separation treatment device for the blast furnace is shown by arrows; the upper arrow indicates that the gas flows to the gas delivery pipe and flows out of the gas delivery pipe; the arrow at the lower part shows that the industrial cooling water of the cooling wall for the blast furnace flows to the water outlet after secondary filtration.
The method for separating and treating the industrial cooling water and the coal gas of the cooling wall for the blast furnace by adopting the coal gas separation and treatment device for the blast furnace comprises the following steps:
1) Installing the coal gas separation treatment device for the blast furnace at a proper position of a blast furnace tuyere platform in a production field;
2) A water inlet valve is arranged at the water inlet of the gas separation treatment device for the blast furnace, a drain valve is arranged at the water outlet, a drain valve is arranged at the drain outlet, and a gas outlet pipe is provided with a gas outlet valve;
3) Closing the blowdown valve and the water inlet valve, and opening the drain valve and the coal gas outlet valve;
4) Connecting the front end of the water inlet valve with a water outlet of industrial water of a water leakage cooling wall of the blast furnace; the gas leading-out pipe is connected with the separated gas collecting and processing device or a gas guide pipe leading to the top of the blast furnace;
5) Opening the water inlet valve, injecting the industrial water of the water leakage cooling wall for the blast furnace into the gas separation treatment device for the blast furnace, and observing whether the water inlet has a surge effect through the toughened glass, thereby indirectly judging the working condition of the cooling wall;
6) Monitoring the gas concentration through the fixed gas detector; monitoring the treated water yield through the flowmeter so as to indirectly monitor the damage change of the cooling wall and the water quantity and treatment effect of industrial cooling water of the cooling wall;
7) Collecting the separated coal gas to a treatment device, and then igniting the coal gas or performing other treatments, or diffusing the separated coal gas on the top of a blast furnace; leading out the filtered industrial cooling water of the water leakage cooling wall for the blast furnace from the water outlet to be used as new industrial cooling water;
8) And opening the drain valve regularly to drain each area of the gas separation treatment device for the blast furnace and clean and maintain the gas separation treatment device for the blast furnace.
Claims (6)
1. A method for separating and treating industrial cooling water and coal gas of a cooling wall for a blast furnace is characterized by comprising the following steps: adopting a gas separation treatment device for the blast furnace to separate the gas in the industrial cooling water of the cooling wall for the blast furnace;
the coal gas separation treatment device for the blast furnace comprises a box body, wherein a first partition plate and a second partition plate are arranged in the box body to divide the box body into three areas: a water intake zone, a settling zone and a drainage zone; the second partition plate is sealed with the box bottom, a thick grating filter screen is arranged at the upper part of the second partition plate, and the thick grating filter screen is not contacted with the box top; the first partition plate is sealed with the top of the box, and a fine grid filter screen is arranged at the lower part of the first partition plate and is in contact connection with the bottom of the box; a water inlet is formed in the top surface of the box body above the water inlet area; a gas delivery pipe is arranged at the top of the box close to or above the sedimentation area; the right side wall of the box body is provided with a water outlet, and the left side wall of the box body is provided with toughened glass; a fixed gas detector is arranged at the outlet of the gas delivery pipe and is used for monitoring the concentration of the gas; the water outlet is provided with a flowmeter for monitoring the treated water yield, and the water yield of the water outlet is provided with a low-flow alarm value so as to indirectly monitor the damage change of the cooling wall and the water quantity of industrial cooling water of the cooling wall;
the separation treatment of the coal gas in the industrial cooling water of the cooling wall for the blast furnace comprises the following steps:
1) Installing the coal gas separation treatment device for the blast furnace at a proper position of a blast furnace tuyere platform in a production field;
2) A water inlet valve is arranged at the water inlet of the gas separation treatment device for the blast furnace, a drain valve is arranged at the water outlet, a drain valve is arranged at the drain outlet, and a gas outlet pipe is provided with a gas outlet valve;
3) Closing the blowdown valve and the water inlet valve, and opening the drain valve and the coal gas outlet valve;
4) Connecting the front end of the water inlet valve with a water outlet of industrial water of a water leakage cooling wall of the blast furnace; the gas leading-out pipe is connected with the separated gas collecting and processing device or a gas guide pipe leading to the top of the blast furnace;
5) Opening the water inlet valve, injecting the industrial water of the water leakage cooling wall for the blast furnace into the gas separation treatment device for the blast furnace, and observing whether the water inlet has a surge effect through the toughened glass, thereby indirectly judging the working condition of the cooling wall;
6) Monitoring the gas concentration through the fixed gas detector; monitoring the treated water yield through the flowmeter so as to indirectly monitor the damage change of the cooling wall and the water quantity and treatment effect of industrial cooling water of the cooling wall;
7) Collecting the separated coal gas into a treatment device, igniting the coal gas or performing other treatments on the coal gas, or diffusing the separated coal gas on the top of the blast furnace; leading out the filtered industrial cooling water of the water leakage cooling wall for the blast furnace from the water outlet to be used as new industrial cooling water;
8) And opening the drain valve regularly to drain each area of the gas separation treatment device for the blast furnace and clean and maintain the gas separation treatment device for the blast furnace.
2. The method for separating and treating industrial cooling water and coal gas of the cooling wall for the blast furnace according to claim 1, which is characterized in that: the aperture of the coarse grid filter screen is 8 mm, and the aperture of the fine grid filter screen is 4 mm.
3. The method for separating and treating industrial cooling water and coal gas of the cooling stave for the blast furnace according to claim 2, wherein: the height of the water outlet part of the water outlet is higher than the height of the second partition plate entity in the water tank, and the height of the water outlet part of the water outlet is lower than the height of the coarse grating filter screen on the second partition plate.
4. The method for separating and treating industrial cooling water and coal gas of the cooling wall for the blast furnace according to claim 3, wherein the method comprises the following steps: the distance between the water outlet and the bottom of the box is more than 200 mm.
5. The method for separating and treating industrial cooling water and coal gas of the cooling stave for the blast furnace according to claim 4, wherein: the box body has the overall dimensions of 1200 mm in length, 600 mm in width and 600 mm in height; the water inlet area, the sedimentation area and the water discharge area respectively occupy 600 mm, 220 mm and 360 mm in the length direction of the box body; the toughened glass has the length of 500 mm and the width of 200 mm.
6. The method for separating and treating industrial cooling water and coal gas of the cooling wall for the blast furnace according to claim 5, wherein the method comprises the following steps: the diameters of the coal gas delivery pipe and the water outlet are both 150 mm; the diameters of a water inlet connected with the industrial cooling water inlet pipe of the cooling wall and the sewage outlet are both 50 mm; the first separator and the second separator are both 10 mm thick.
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