CN112553387B - High-temperature metallurgical slag water quenching and smoke treatment device and method - Google Patents
High-temperature metallurgical slag water quenching and smoke treatment device and method Download PDFInfo
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- CN112553387B CN112553387B CN202011461539.9A CN202011461539A CN112553387B CN 112553387 B CN112553387 B CN 112553387B CN 202011461539 A CN202011461539 A CN 202011461539A CN 112553387 B CN112553387 B CN 112553387B
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B3/00—General features in the manufacture of pig-iron
- C21B3/04—Recovery of by-products, e.g. slag
- C21B3/06—Treatment of liquid slag
- C21B3/08—Cooling slag
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2100/00—Handling of exhaust gases produced during the manufacture of iron or steel
- C21B2100/40—Gas purification of exhaust gases to be recirculated or used in other metallurgical processes
- C21B2100/44—Removing particles, e.g. by scrubbing, dedusting
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/02—Physical or chemical treatment of slags
- C21B2400/022—Methods of cooling or quenching molten slag
- C21B2400/024—Methods of cooling or quenching molten slag with the direct use of steam or liquid coolants, e.g. water
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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
- Y02P10/20—Recycling
Abstract
The invention provides a high-temperature metallurgical slag water quenching and smoke treatment device and method, the device comprises a granulating tower, a slag pool, an air heater and a cooling tower, wherein the granulating tower comprises a slag flushing port, a hot slag port, a white mist guiding back port, a spraying area, a wind mixer and an exhaust fan which are sequentially arranged from bottom to top, the bottom of the granulating tower is connected with the middle part of the slag pool, the upper part of the slag pool is connected with the white mist guiding back port, a slag flushing water outlet of the slag pool is connected with a hot water inlet of the air heater through a first slag flushing water cooling pipeline G41, a hot water outlet of the air heater is connected with a hot water inlet of the cooling tower through a second slag flushing water cooling pipeline G42, the top of the cooling tower is connected with the white mist guiding back port through a second white mist collecting pipeline G2, and a hot air outlet of the air heater is connected with the wind mixer through a hot air pipeline G7. The invention can fully utilize the heat of slag flushing water to realize the cyclic utilization of cooling water in the system, and effectively and intelligently control white smoke generated by equipment such as a granulating tower, a slag pool, a cooling tower and the like.
Description
[ field of technology ]
The invention relates to the technical field of flue gas purification, in particular to a high-temperature metallurgical slag water quenching and smoke treatment device and method.
[ background Art ]
High-temperature slag treatment in the metallurgical industry, such as blast furnace water slag flushing and converter hot splashing/hot slag disintegrating processes, can generate a large amount of steam white smoke, and meanwhile, auxiliary equipment for high-temperature slag treatment, such as a slag pool and a cooling tower, can generate a large amount of white mist to form a phenomenon of smoke diffusion. Currently, some metallurgical white smoke treatment patents such as CN211585860U, CN211471466U exist in China, and the two patents adopt a spray tower primary cooling condensation and bottom filter residue tank back flushing secondary cooling condensation mode to eliminate white smoke, on one hand, whether the mode thoroughly eliminates white smoke to be demonstrated or not can not be considered, and white smoke treatment generated by auxiliary equipment such as a cooling tower is not considered; on the other hand, 2 cooling towers are additionally arranged, so that the occupied area is large, and the economical efficiency is poor. CN211284416U adopts a method of flue spraying, secondary cooling condensing of spraying by a spray tower and mixing of waste heat of flue gas of a hot blast stove to eliminate white smoke, the method needs to add the spray tower and lay long-distance flue gas pipelines of the hot blast stove, spray water is not subjected to cooling treatment and is recycled infinitely, the condensing cooling effect is limited, and the problems of complex system, large occupied area, large investment, non-ideal effect and the like exist.
Therefore, although the prior art has provided methods for whitening and waste heat recovery of a blast furnace slag flushing system, various degrees and aspects of defects remain to be improved, and a technology for synergistic whitening, compact structure and economic feasibility needs to be developed.
[ invention ]
The invention aims to solve the problems in the prior art, and provides a high-temperature metallurgical slag water quenching and smoke treatment device and method, which can realize the cooperative treatment of a plurality of white smoke point sources in a metallurgical high-temperature slag water treatment system, and are economical, feasible, energy-saving and efficient.
In order to achieve the above purpose, the invention provides a high-temperature metallurgical slag water quenching and smoke treatment device, which comprises a granulating tower, a slag pool, an air heater and a cooling tower, wherein the granulating tower comprises a slag flushing port, a hot slag port, a white mist guiding back port, a spraying area, a wind mixer and an exhaust fan which are sequentially arranged from bottom to top, the bottom of the granulating tower is connected with the middle part of the slag pool through a slag water pipeline G3, the side wall of the upper part of the slag pool is connected with the white mist guiding back port through a first white mist collecting pipeline G1, the slag flushing water outlet of the slag pool is connected with the hot water inlet of the air heater through a first slag flushing water cooling pipeline G41, the hot water outlet of the air heater is connected with the hot water inlet of the cooling tower through a second slag flushing water cooling pipeline G42, the top of the cooling tower is connected with the white mist guiding back port through a second white mist collecting pipeline G2, the hot air outlet of the air heater is connected with the wind mixer through a hot air pipeline G7, and a fan 5 is arranged on the hot air pipeline G7.
Preferably, an outlet at the bottom of the cooling tower is connected with a third slag flushing water cooling pipeline G43, a third circulating water pump is arranged on the third slag flushing water cooling pipeline G43, a bypass is arranged at the outlet of the third circulating water pump, one path is connected with a slag flushing water gap through a slag flushing water circulating pipeline G5, and the other path is connected with a spraying area through a spraying water pipeline G6.
Preferably, the shower water pipe G6 is connected to a tempering device.
Preferably, the slag pool further comprises a first sealing cover, and the top of the slag pool is sealed by the first sealing cover.
Preferably, the cooling tower further comprises a second sealing cover, wherein the top of the cooling tower is sealed by the second sealing cover, and the top of the second sealing cover is connected with the white fog return port through a second white fog collecting pipeline G2.
Preferably, the first and second slag water cooling pipelines G41 and G42 are respectively provided with a first and second circulating water pumps.
The invention also provides a water quenching and smoke treatment method for the high-temperature metallurgical slag, which comprises the following steps:
s1, slag flushing water and high-temperature metallurgical slag enter a granulating tower through a slag flushing port and a hot slag port respectively to finish slag flushing operation, the formed slag-water mixture is collected at the bottom of the granulating tower, and formed high-temperature slag flushing steam moves from bottom to top along the granulating tower;
s2, enabling a slag-water mixture at the bottom of the granulating tower to enter a slag pool through a slag water pipeline G3 for slag-water separation operation, enabling the surface of the slag pool to generate a large amount of white mist due to water evaporation, and leading the white mist back to a white mist leading-back port through a first white mist collecting pipeline G1;
s3, the high-temperature slag flushing water discharged from the bottom of the slag pool enters an air heater, primary cooling operation is carried out on the high-temperature slag flushing water and cold air, the cold air entering the air heater is heated by the high-temperature slag flushing water to form hot air, and the hot air is introduced into an air mixer;
s4, the high-temperature slag flushing water discharged by the air heater enters a cooling tower and is subjected to secondary cooling operation with cold air, a large amount of white mist is generated in the cooling tower due to water evaporation, and the white mist is led back to a white mist leading-back port through a second white mist collecting pipeline G2;
s5, conveying low-temperature slag flushing water discharged by the cooling tower to a slag flushing water port through a bypass, and conveying the other path to a spraying area for spraying after water supplementing and tempering;
s6, mixing high-temperature slag washing steam formed at the bottom of the granulating tower with the white mist collected at the return port of the white mist, cooling, condensing and water collecting operation is carried out in a spraying area from bottom to top, then, mixing and heating operation is carried out on the high-temperature slag washing steam and hot air from an air heater by entering the air mixer, hot unsaturated gas is formed, and the hot unsaturated gas is discharged from the top of the granulating tower.
Preferably, an exhaust fan is arranged at the top of the granulating tower, and unsaturated gas is exhausted through the exhaust fan.
The invention treats the white smoke and the white fog of the existing equipment and the accessory equipment in a cooperative way, eliminates the white smoke and the white fog by adopting a spray cooling and hot air reheating method, fully utilizes the heat of slag flushing water in the whole process, realizes the recycling of cooling water in the system, and can intelligently control the white smoke. The system has the advantages of compact structure, small investment and the like, and is particularly suitable for blast furnace plant reconstruction engineering with shortage of plant area.
The invention has the beneficial effects that:
1. the comprehensive treatment of white smoke generated by the granulating tower and the slag pool and white fog generated by accessory equipment (cooling tower) eliminates the white smoke plume of the existing equipment and does not add extra white smoke.
2. The heat of slag flushing water is fully utilized to thoroughly eliminate colored smoke plume, and the on-site heat is taken, so that the method is economical and feasible.
3. Compact structure, only one place discharges fume, and can realize white smoke control intellectuality through the regulation of air heater.
The features and advantages of the present invention will be described in detail by way of example with reference to the accompanying drawings.
[ description of the drawings ]
FIG. 1 is a schematic diagram of a device for water quenching and smoke abatement of pyrometallurgical slag according to the present invention.
In the figure: 1-granulating tower, 11-slag flushing port, 12-hot slag port, 13-white fog return port, 14-spraying area, 15-air mixer, 16-exhaust fan, 2-slag pool, 21-first sealed cover, 3-air heater, 4-cooling tower, 41-second sealed cover, 5-exhaust fan, 61-first circulating water pump, 62-second circulating water pump and 63-third circulating water pump; g1-a first white fog collecting pipeline, G2-a second white fog collecting pipeline, G3-a slag water pipeline, G41-a first slag flushing water cooling pipeline, G42-a second slag flushing water cooling pipeline, G43-a second slag flushing water cooling pipeline, G5-a slag flushing water circulating pipeline, G6-a spraying water pipeline and G7-a hot air pipeline.
[ detailed description ] of the invention
Referring to fig. 1, the high-temperature metallurgical slag water quenching and smoke treatment device comprises a granulating tower 1, a slag pool 2, an air heater 3 and a cooling tower 4, wherein the granulating tower 1 comprises a slag flushing water port 11, a hot slag port 12, a white mist guiding back port 13, a spraying area 14, a wind mixer 15 and an exhaust fan 16 which are sequentially arranged from bottom to top, the bottom of the granulating tower 1 is connected with the middle part of the slag pool 2 through a slag water pipeline G3, the side wall of the upper part of the slag pool 2 is connected with a white mist guiding back port 13 through a first white mist collecting pipeline G1, the slag flushing water outlet of the slag pool 2 is connected with the hot water inlet of the air heater 3 through a first slag flushing water cooling pipeline G41, the hot water outlet of the air heater 3 is connected with the hot water inlet of the cooling tower 4 through a second slag flushing water cooling pipeline G42, the top of the cooling tower 4 is connected with the white mist guiding back port 13 through a second white mist collecting pipeline G2, the hot wind outlet of the air heater 3 is connected with the wind mixer 15 through a hot wind pipeline G7, and the wind exhauster 5 is arranged on the hot wind pipeline G7.
Further, an outlet at the bottom of the cooling tower 4 is connected with a third slag flushing water cooling pipeline G43, a third circulating water pump 63 is arranged on the third slag flushing water cooling pipeline G43, a bypass is arranged at the outlet of the third circulating water pump 63, one path is connected with the slag flushing water port 11 through a slag flushing water circulating pipeline G5, the other path is connected with the spraying area 14 through a spraying water pipeline G6, and a tempering device is connected on the spraying water pipeline G6.
Further, the top of the slag bath 2 is sealed by a first sealing cover 21, the top of the cooling tower 4 is sealed by a second sealing cover 41, and the top of the second sealing cover 41 is connected with the white mist return opening 13 through a second white mist collecting pipeline G2.
Further, a first circulating water pump 61 and a second circulating water pump 62 are respectively disposed on the first slag water cooling pipeline G41 and the second slag water cooling pipeline G42.
A water quenching and smoke treatment method for high-temperature metallurgical slag comprises the following steps:
s1, slag flushing water and high-temperature metallurgical slag enter a granulating tower 1 through a slag flushing water port 11 and a hot slag port 12 respectively to finish slag flushing operation, the formed slag-water mixture is collected at the bottom of the granulating tower 1, and formed high-temperature slag flushing steam moves from bottom to top along the granulating tower 1;
s2, enabling a slag-water mixture at the bottom of the granulating tower 1 to enter a slag pool 2 through a slag water pipeline G3 for slag-water separation operation, enabling the surface of the slag pool 2 to generate a large amount of white mist due to water evaporation, and leading the white mist back to a white mist leading-back opening 13 through a first white mist collecting pipeline G1;
s3, high-temperature slag flushing water discharged from the bottom of the slag pool 2 enters an air heater 3, primary cooling operation is carried out on the high-temperature slag flushing water and cold air, the cold air entering the air heater 3 is heated by the high-temperature slag flushing water to form hot air, the hot air is introduced into an air mixer 15, and the cooling effect is intelligently controlled according to the white smoke degree of smoke discharged from the top of the granulating tower 1;
s4, high-temperature slag flushing water discharged by the air heater 3 enters the cooling tower 4 and is subjected to secondary cooling operation with cold air, a large amount of white mist is generated in the cooling tower 4 due to water evaporation, and the white mist is led back to the white mist leading-back opening 13 through the second white mist collecting pipeline G2;
s5, conveying low-temperature slag flushing water discharged by the cooling tower 4 to a slag flushing water port 11 for slag flushing operation through a bypass, and conveying the other path to a spraying area 14 for spraying operation after water supplementing and tempering;
s6, high-temperature slag washing steam formed at the bottom of the granulating tower 1 is mixed with the white mist collected by the white mist return opening 13, enters the spraying area 14 from bottom to top to perform cooling, condensing and water collecting operation, enters the air mixer 15 to perform mixing and heating operation with hot air from the air heater 3 to form hot unsaturated gas, and is finally discharged through the exhaust fan 16, so that no white smoke phenomenon exists.
The above embodiments are illustrative of the present invention, and not limiting, and any simple modifications of the present invention fall within the scope of the present invention.
Claims (8)
1. The utility model provides a pyrometallurgical sediment water quenching and smog treatment device which characterized in that: including granulation tower (1), slag bath (2), air heater (3) and cooling tower (4), granulation tower (1) are including slag flushing mouth (11), hot slag mouth (12), white fog draw back mouth (13), spray zone (14), air mixer (15), exhaust fan (16) that arrange in proper order from bottom to top, slag bath (2) middle part is connected through slag water pipeline G3 in the bottom of granulation tower (1), slag bath (2) upper portion lateral wall is connected white fog and is drawn back mouth (13) through first white fog collecting pipeline G1, slag flushing water export of slag bath (2) is connected the hot water import of air heater (3) through first slag flushing water cooling pipeline G41, the hot water export of air heater (3) is connected the hot water import of cooling tower (4) through second slag flushing water cooling pipeline G42, the hot-blast mouth (13) that draws back is connected through second white fog collecting pipeline G2 in the top of cooling tower (4), the hot-blast export of air heater (3) is connected through hot-blast pipeline G7, air mixer (15) set up on the air exhauster (5).
2. The pyrometallurgical slag water quenching and smoke abatement apparatus of claim 1, wherein: the outlet of cooling tower (4) bottom is connected with third slag water cooling pipeline G43, set up third circulating water pump (63) on the third slag water cooling pipeline G43, third circulating water pump (63) export sets up the bypass, and one way is connected slag water mouth (11) through slag water circulating pipeline G5, and another way is connected spray district (14) through spray water pipeline G6.
3. The pyrometallurgical slag water quenching and smoke abatement apparatus of claim 2, wherein: the spray water pipeline G6 is connected with a tempering device.
4. A pyrometallurgical slag water quenching and smoke abatement apparatus according to claim 3, wherein: the slag pool is characterized by further comprising a first sealing cover (21), wherein the top of the slag pool (2) is sealed by the first sealing cover (21).
5. The pyrometallurgical slag water quenching and smoke abatement apparatus of claim 4, wherein: the cooling tower is characterized by further comprising a second sealing cover (41), wherein the top of the cooling tower (4) is sealed by the second sealing cover (41), and the top of the second sealing cover (41) is connected with the white mist guiding return opening (13) through a second white mist collecting pipeline G2.
6. The pyrometallurgical slag water quenching and smoke abatement apparatus of claim 5, wherein: the first slag water cooling pipeline G41 and the second slag water cooling pipeline G42 are respectively provided with a first circulating water pump (61) and a second circulating water pump (62).
7. A water quenching and smoke treatment method for high-temperature metallurgical slag is characterized in that: the method comprises the following steps:
s1, slag flushing water and high-temperature metallurgical slag enter a granulating tower (1) through a slag flushing port (11) and a hot slag port (12) respectively to finish slag flushing operation, a formed slag-water mixture is collected at the bottom of the granulating tower (1), and formed high-temperature slag flushing steam moves from bottom to top along the granulating tower (1);
s2, enabling a slag-water mixture at the bottom of the granulating tower (1) to enter a slag pool (2) through a slag water pipeline G3 for slag-water separation operation, enabling the surface of the slag pool (2) to generate a large amount of white mist due to water evaporation, and leading the white mist back to a white mist leading-back opening (13) through a first white mist collecting pipeline G1;
s3, high-temperature slag flushing water discharged from the bottom of the slag pool (2) enters an air heater (3), primary cooling operation is carried out on the slag flushing water and cold air, the cold air entering the air heater (3) is heated by the high-temperature slag flushing water to form hot air, and the hot air is introduced into an air mixer (15);
s4, high-temperature slag flushing water discharged by the air heater (3) enters a cooling tower (4) and is subjected to secondary cooling operation with cold air, a large amount of white mist is generated in the cooling tower (4) due to water evaporation, and the white mist is returned to the white mist return port (13) through a second white mist collecting pipeline G2;
s5, conveying low-temperature slag flushing water discharged by the cooling tower (4) to a slag flushing water port (11) for slag flushing operation through a bypass, and conveying the other path to a spraying area (14) for spraying operation after water supplementing and tempering;
s6, high-temperature slag washing steam formed at the bottom of the granulating tower (1) is mixed with the white mist collected by the white mist leading-back opening (13), enters the spraying area (14) from bottom to top to perform cooling, condensing and water collecting operation, enters the air mixer (15) to perform mixing and heating operation with hot air from the air heater (3) to form hot unsaturated gas, and is discharged from the top of the granulating tower (1).
8. The method for water quenching and smoke abatement of pyrometallurgical slag according to claim 7, wherein: an exhaust fan (16) is arranged at the top of the granulating tower (1), and unsaturated gas is exhausted through the exhaust fan (16).
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| CN202011461539.9A CN112553387B (en) | 2020-12-11 | 2020-12-11 | High-temperature metallurgical slag water quenching and smoke treatment device and method |
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| CN202011461539.9A CN112553387B (en) | 2020-12-11 | 2020-12-11 | High-temperature metallurgical slag water quenching and smoke treatment device and method |
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| CN112553387B true CN112553387B (en) | 2023-10-03 |
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| GB657568A (en) * | 1947-11-27 | 1951-09-19 | Vitkovice Zelezarny | Process and apparatus for the granulation of slag by means of a cooling liquid |
| JPH08245243A (en) * | 1995-03-08 | 1996-09-24 | Rasa Shoji Kk | Treatment of harmful gas for water granulation system of blast furnace molten slag and treating equipment therefor |
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| CN110093465A (en) * | 2019-04-16 | 2019-08-06 | 浙江菲达环保科技股份有限公司 | A kind of blast furnace slag flushing vapor disappears white system and method |
| CN112044224A (en) * | 2020-08-05 | 2020-12-08 | 浙江菲达环保科技股份有限公司 | Deep treatment system and treatment method for high-temperature water-washed slag steam pollutants |
| CN112044223A (en) * | 2020-08-05 | 2020-12-08 | 浙江菲达环保科技股份有限公司 | High-temperature water slag flushing steam colored smoke plume treatment system and method |
| CN112044222A (en) * | 2020-08-05 | 2020-12-08 | 浙江菲达环保科技股份有限公司 | System and method for removing colored smoke plume of high-temperature water-washed slag steam |
| CN214327769U (en) * | 2020-12-11 | 2021-10-01 | 浙江菲达环保科技股份有限公司 | Device is administered with smog to metallurgical sediment shrend of high temperature |
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| LU92235B1 (en) * | 2013-07-01 | 2015-01-02 | Wurth Paul Sa | Steam condensation tower for a granulation installation |
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2020
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|---|---|---|---|---|
| GB657568A (en) * | 1947-11-27 | 1951-09-19 | Vitkovice Zelezarny | Process and apparatus for the granulation of slag by means of a cooling liquid |
| JPH08245243A (en) * | 1995-03-08 | 1996-09-24 | Rasa Shoji Kk | Treatment of harmful gas for water granulation system of blast furnace molten slag and treating equipment therefor |
| CN109457065A (en) * | 2018-12-07 | 2019-03-12 | 北京宇清源节能科技发展有限公司 | A kind of blast furnace washing slag water dead steam recovery system |
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| CN214327769U (en) * | 2020-12-11 | 2021-10-01 | 浙江菲达环保科技股份有限公司 | Device is administered with smog to metallurgical sediment shrend of high temperature |
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| CN112553387A (en) | 2021-03-26 |
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