CN101660014A - Molten blast furnace slag sensible heat recovery method and device - Google Patents
Molten blast furnace slag sensible heat recovery method and device Download PDFInfo
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- CN101660014A CN101660014A CN200910187586A CN200910187586A CN101660014A CN 101660014 A CN101660014 A CN 101660014A CN 200910187586 A CN200910187586 A CN 200910187586A CN 200910187586 A CN200910187586 A CN 200910187586A CN 101660014 A CN101660014 A CN 101660014A
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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
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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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
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Abstract
The invention relates to the field of energy recovery utilization and in particular to a molten blast furnace slag sensible heat recovery method and a device; the method is characterized in that: themolten blast furnace slag carries out a first heat recovery in a granulator, and then a second heat recovery is carried out by a vibrated bed, and then a third heat recovery is carried out in a fluidized bed, and the reclaimed heat energy is reutilized or converted in a hot air or power generating way; the realization steps are that: 1) the molten blast furnace slag is arranged in the granulator for granulation; 2) the blast furnace slag granules carry out heat exchange in the vibrated bed; 3) the blast furnace slag granules carry out heat exchange in the fluidized bed; 4) after heat exchangeis carried out, the heat is used for power generation from air or is directly utilized in a hot wind way. The method has the beneficial effects that: the sensible heat of the molten blast furnace slagis utilized respectively in a way of waste heat stream power generation and in a way of blast furnace hot wind, compared with the existing water quenching method, 1.0-1.2t of fresh water can be savedwhen processing 1t of molten slag, and sulfides H2S and SO2 are not produced, and energy equivalent to 47kg of standard coal is saved.
Description
Technical field
The present invention relates to energy recovery and utilize the field, relate in particular to molten blast furnace slag sensible heat recovery method and device in iron and steel, the nonferrous metallurgy industry.
Background technology
Iron And Steel Industry is for development and national economy provides important basic raw material, belongs to the energy, resource-integrated industry that resource consumption is big.In the production steel product, also discharge a large amount of wastes, environment is caused serious pollution.Though Iron And Steel Industry is power consumption and blowdown rich and influential family in the national economy field, also be one of industry that has the energy-saving and emission-reduction potentiality simultaneously.Wherein, recycling various waste heats is further energy-conservation important breakthrough mouths of Iron And Steel Industry.Blast furnace slag is in blast furnace ironmaking process, the by product that is formed by non-volatilization component in the gangue in the ore, ash content in the fuel and the flux.One ton of pig iron of China's smelting at present produces 0.3～0.6 ton of blast furnace slag approximately.China produced 4.71 hundred million tons of iron in 2008, calculated even press 0.3t slag/t iron, and the growing amount of blast furnace slag is also at 1.4 hundred million tons, the temperature of melt blast furnace slag is greater than 1500 ℃ simultaneously, this shows that blast furnace slag has draws materials easily, and characteristics such as sensible heat height are one of the widest materials of waste heat recovery prospect.But it is handled and adopts water quenching mostly at present, the fused blast furnace slag is poured in the water, water is met high temperature and is blasted, blast furnace slag is broken into particulate, and produce a large amount of steam, the shortcoming of this method is: not only the sensible heat of blast furnace slag can't utilize, and cause a large amount of wastes of water resources, atmosphere, water and soil earth have also been caused serious pollution, worsen Working environment, therefore, how to have reclaimed the high temperature sensible heat of blast furnace slag efficiently, reduce pollution on the environment in its treating processes, just become a urgent problem.
Summary of the invention
The purpose of this invention is to provide a kind of molten blast furnace slag sensible heat recovery method and device, reclaim the high temperature sensible heat of blast furnace slag efficiently, reduce pollution on the environment in its treating processes, and the blast furnace slag after handling can satisfy the requirement of making cement.
For achieving the above object, the present invention is achieved through the following technical solutions:
Molten blast furnace slag sensible heat recovery method; it is characterized in that; molten blast furnace slag carries out heat earlier and reclaims for the first time in pelletizer; carrying out heat through vibrating bed again reclaims for the second time; in fluidized-bed, carry out at last the recovery for the third time of heat; the heat energy that reclaims is reused or energy transformation with the form of hot blast or generating, and the step of its realization is as follows:
1) temperature reaches 1400～1500 ℃ molten blast furnace slag and flows into pelletizer through slag ladle, is that to be broken into diameter under 1800～2000 rev/mins the centrifugation be that the particle of 1～5mm is beaten cooled and solidified on the water wall of pelletizer at rotating speed, finishes thermal exchange for the first time;
2) above-mentioned high temperature blast furnace slag particle at the inclination angle is 10～30 °, amplitude is to move on the vibrating bed of 10～25mm, heat exchange air one upwards passes through the blast furnace slag granular layer by the vibrating bed bottom and takes away heat, and the blast furnace slag particle temperature is reduced to 700～900 ℃, finishes thermal exchange for the second time;
3) above-mentioned blast furnace slag particle enters fluidized-bed, and heat exchange air two stirs between the inner blast furnace slag granular layer of fluidized-bed and takes away heat, and the blast furnace slag particle temperature is reduced to 150 ℃, finishes thermal exchange for the third time;
4) heat exchange air one and the heat exchange air two after heating up enters generator one and generator two through cleaning apparatus respectively, heat energy is converted into electric energy stored and utilize, and the higher heat exchange air one of temperature also can directly use for blast furnace with the form of hot blast.
The device that described molten blast furnace slag sensible heat recovery method adopts; it is characterized in that; comprise slag ladle, pelletizer, vibrating bed, fluidized-bed, cleaning apparatus, generator, gas blower; pelletizer top is provided with slag ladle; pelletizer is connected with vibrating bed, fluidized-bed successively; gas blower is connected with vibrating bed, fluidized-bed bottom respectively, and the heat exchange air is connected with generator through cleaning apparatus, and generator is connected by return air pipeline, cleaning apparatus and gas blower.
Described pelletizer inwall is provided with water wall.
Compared with prior art; the invention has the beneficial effects as follows: the present invention reclaims and three processes of energy transformation by dry type granulation, sensible heat; principle according to the energy level coupling; reclaim step by step, the cascade utilization molten blast furnace slag sensible heat; carry out heat energy utilization with the form of afterheat steam generating and blast-furnace hot-air respectively, cooled blast furnace slag can be used as cement raw material, compares with existing water quenching; every processing 1t slag can be saved the new water of 1.0～1.2t, does not have sulfide H
2S and SO
2Produce, save the energy that is equivalent to the 47kg standard coal.
Description of drawings
Fig. 1 is molten blast furnace slag sensible heat retrieving arrangement embodiment one structural representation of the present invention;
Fig. 2 is molten blast furnace slag sensible heat retrieving arrangement embodiment two structural representations of the present invention.
1-slag ladle 2-water wall 3-pelletizer 4-vibrating bed 5-fluidized-bed 6-generator one 7-two 8-cleaning apparatus 9-return air pipeline 10-gas blowers, one 11-gas blower, two 12-heat exchange air, one 13-heat exchange air, the two 14-blast furnaces that generate electricity among the figure
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described further:
Molten blast furnace slag sensible heat recovery method; molten blast furnace slag carries out heat earlier and reclaims for the first time in pelletizer; carrying out heat through vibrating bed again reclaims for the second time; in fluidized-bed, carry out at last the recovery for the third time of heat; the heat energy that reclaims is reused or energy transformation with the form of hot blast or generating, and the step of its realization is as follows:
1) temperature reaches 1400～1500 ℃ molten blast furnace slag and flows into pelletizer through slag ladle, is that to be broken into diameter under 1800～2000 rev/mins the centrifugation be that the particle of 1～5mm is beaten cooled and solidified on the water wall of pelletizer at rotating speed, finishes thermal exchange for the first time;
2) above-mentioned high temperature blast furnace slag particle at the inclination angle is 10～30 °, amplitude is to move on the vibrating bed of 10～25mm, heat exchange air one upwards passes through the blast furnace slag granular layer by the vibrating bed bottom and takes away heat, and the blast furnace slag particle temperature is reduced to 700～900 ℃, finishes thermal exchange for the second time;
3) above-mentioned blast furnace slag particle enters fluidized-bed, and heat exchange air two stirs between the inner blast furnace slag granular layer of fluidized-bed and takes away heat, and the blast furnace slag particle temperature is reduced to 150 ℃, finishes thermal exchange for the third time;
4) heat exchange air one and the heat exchange air two after heating up enters generator one and generator two through cleaning apparatus respectively, heat energy is converted into electric energy stored and utilize, and the higher heat exchange air one of temperature also can directly use for blast furnace with the form of hot blast.
See Fig. 1; molten blast furnace slag sensible heat retrieving arrangement embodiment one structural representation of the present invention; comprise slag ladle 1; pelletizer 3; vibrating bed 4; fluidized-bed 5; cleaning apparatus 8; generator 1; generator 27; gas blower 1; gas blower 2 11; pelletizer 3 tops are provided with slag ladle 1; pelletizer 3 successively with vibrating bed 4; fluidized-bed 5 is connected; gas blower 1 is connected with vibrating bed 4 bottoms; gas blower 2 11 is connected with fluidized-bed 5 bottoms; the heat exchange air 1 of being discharged by vibrating bed 4 tops is connected with generator 1 through cleaning apparatus 8; the heat exchange air 2 13 of being discharged by fluidized-bed 5 tops is connected with generator 27 through cleaning apparatus 8; generator 1; generator 27 is by return air pipeline 9; cleaning apparatus 8 respectively with gas blower 1; gas blower 2 11 is connected, and pelletizer 3 inwalls are provided with water wall 2.The heat exchange air 1 that discharge at vibrating bed 4 tops also is connected with blast furnace.Gas blower 1 makes with gas blower 2 11 and forms the air-flow that stirs in the fluidized-bed 5, makes blast furnace slag fully distribute sensible heat.
Molten blast furnace slag carries out fragmentation among the present invention from slag ladle 1 flows to the pelletizer 3 of high speed rotating of vertical lower, and the slag particle after the fragmentation moves to fluidized-bed 5 through water wall 2 cooled and solidified by the vibrating bed 4 with certain angle of inclination.In this process, reclaim, obtain reasonable use by generator 1, generator 27 and blast furnace 7 energy through three thermal exchange.After fluidized-bed 5 bottom slag particle temperature are reduced to 150 ℃, be transported to the cement mill from fluidized-bed 5 discharges and make cement.Generator 1, generator 27 adopt turbo-generator.
The present invention adopts pelletizer 3, utilizes centrifugal force to carry out the fragmentation of slag dry type, and the conserve water consumption significantly reduces pollutant emission.
The present invention adopts the molten blast furnace slag sensible heat retrieving arrangement to reclaim through three exchanges that pelletizer 3, vibrating bed 4, fluidized-bed 5 carry out heat, helps the purpose that realizes that energy fully reclaims, rationally utilizes.
The blast furnace slag that the present invention adopts the molten blast furnace slag sensible heat retrieving arrangement to discharge through fluidized-bed 5 can be used for producing cement, helps realizing " zero release " of waste.
The present invention adopts the flue dust that produces in the molten blast furnace slag sensible heat retrieving arrangement to enter in power generation system and the blast furnace 7 after fly-ash separator 8 is removed dust again.
See Fig. 2; molten blast furnace slag sensible heat retrieving arrangement embodiment two structural representations of the present invention; comprise slag ladle 1; pelletizer 3; vibrating bed 4; fluidized-bed 5; cleaning apparatus 8; generator 1; gas blower 1; gas blower 2 11; pelletizer 3 tops are provided with slag ladle 1; pelletizer 3 successively with vibrating bed 4; fluidized-bed 5 is connected; gas blower 1 is connected with vibrating bed 4 bottoms; gas blower 2 11 is connected with fluidized-bed 5 bottoms; the heat exchange air 12 of being discharged by vibrating bed 4 and fluidized-bed 5 tops converges through cleaning apparatus 8 and is connected with generator 1; generator 1 is by return air pipeline 9; cleaning apparatus 8 respectively with gas blower 1; gas blower 2 11 is connected, and pelletizer 3 inwalls are provided with water wall 2.
Present embodiment is applicable to the small-scale production situation, and hot blast can not directly utilize, and all gathers to be used for generating, this method can cause the entropy loss of heat, therefore press the principle of energy level coupling, recovery, cascade utilization molten blast furnace slag sensible heat could guarantee the better utilised rate step by step.
Claims (3)
1, molten blast furnace slag sensible heat recovery method; it is characterized in that; molten blast furnace slag carries out heat earlier and reclaims for the first time in pelletizer; carrying out heat through vibrating bed again reclaims for the second time; in fluidized-bed, carry out at last the recovery for the third time of heat; the heat energy that reclaims is reused or energy transformation with the form of hot blast or generating, and the step of its realization is as follows:
1) temperature reaches 1400～1500 ℃ molten blast furnace slag and flows into pelletizer through slag ladle, is that to be broken into diameter under 1800～2000 rev/mins the centrifugation be that the particle of 1～5mm is beaten cooled and solidified on the water wall of pelletizer at rotating speed, finishes thermal exchange for the first time;
2) above-mentioned high temperature blast furnace slag particle at the inclination angle is 10～30 °, amplitude is to move on the vibrating bed of 10～25mm, heat exchange air one upwards passes through the blast furnace slag granular layer by the vibrating bed bottom and takes away heat, and the blast furnace slag particle temperature is reduced to 700～900 ℃, finishes thermal exchange for the second time;
3) above-mentioned blast furnace slag particle enters fluidized-bed, and heat exchange air two stirs between the inner blast furnace slag granular layer of fluidized-bed and takes away heat, and the blast furnace slag particle temperature is reduced to 150 ℃, finishes thermal exchange for the third time;
4) heat exchange air one and the heat exchange air two after heating up enters generator one and generator two through cleaning apparatus respectively, heat energy is converted into electric energy stored and utilize, and the higher heat exchange air one of temperature also can directly use for blast furnace with the form of hot blast.
2, the device of the described molten blast furnace slag sensible heat recovery method employing of claim 1; it is characterized in that; comprise slag ladle, pelletizer, vibrating bed, fluidized-bed, cleaning apparatus, generator, gas blower; pelletizer top is provided with slag ladle; pelletizer is connected with vibrating bed, fluidized-bed successively; gas blower is connected with vibrating bed, fluidized-bed bottom respectively, and the heat exchange air is connected with generator through cleaning apparatus, and generator is connected by return air pipeline, cleaning apparatus and gas blower.
3, molten blast furnace slag sensible heat retrieving arrangement according to claim 2 is characterized in that, described pelletizer inwall is provided with water wall.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910187586A CN101660014A (en) | 2009-09-24 | 2009-09-24 | Molten blast furnace slag sensible heat recovery method and device |
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| CN200910187586A CN101660014A (en) | 2009-09-24 | 2009-09-24 | Molten blast furnace slag sensible heat recovery method and device |
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Cited By (28)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101864504A (en) * | 2010-06-24 | 2010-10-20 | 陈瑞颖 | Method for raising air temperature of hot blast stove by recovering sensible heat of blast furnace slag |
| CN101886149A (en) * | 2010-07-08 | 2010-11-17 | 无锡市东方环境工程设计研究所有限公司 | High temperature liquid slag recovery method |
| CN101886148A (en) * | 2010-07-08 | 2010-11-17 | 无锡市东方环境工程设计研究所有限公司 | Method for recovering high-temperature molten slag |
| CN101907405A (en) * | 2010-07-28 | 2010-12-08 | 鹤壁地恩地新材料科技有限公司 | Heat recovery device of magnesium smelting reducing slag |
| CN101913784A (en) * | 2010-09-13 | 2010-12-15 | 北京慧德盛节能科技有限公司 | Dry method granulating and waste heat recovering process of blast-furnace slag |
| CN102228774A (en) * | 2011-05-27 | 2011-11-02 | 中钢集团鞍山热能研究院有限公司 | Method and device for sensible heat reclaiming of blast furnace slag and desulfurization of sintering flue gas |
| CN102424867A (en) * | 2011-12-31 | 2012-04-25 | 钢铁研究总院 | Slag granulating and waste heat recovery device |
| CN102433401A (en) * | 2011-12-20 | 2012-05-02 | 南京凯盛开能环保能源有限公司 | Melting furnace slag quenching dry type granulation and sensible heat recovery generating system and method using same |
| CN102492793A (en) * | 2011-12-23 | 2012-06-13 | 东北大学 | Granulation apparatus of molten state metallurgy slag |
| CN102534073A (en) * | 2010-12-14 | 2012-07-04 | 保尔伍斯股份有限公司 | Steam condensation tower for a granulation installation |
| CN102719579A (en) * | 2012-05-31 | 2012-10-10 | 四川川润股份有限公司 | Fluidized heat exchange device after slag of dry type granulating blast furnace |
| CN102851416A (en) * | 2012-09-24 | 2013-01-02 | 四川环能德美科技股份有限公司 | Heat recovery method for blast furnace slag |
| CN102851415A (en) * | 2012-09-24 | 2013-01-02 | 四川环能德美科技股份有限公司 | Recycling system of blast furnace slag heat |
| CN102912044A (en) * | 2012-10-22 | 2013-02-06 | 李玉亮 | Novel efficient and energy-saving dry type granulating system of slag and method thereof |
| CN103014201A (en) * | 2013-01-18 | 2013-04-03 | 北京科技大学 | Device and method for gas-solid ejection and granulation of molten blast furnace slags |
| CN103398578A (en) * | 2013-07-23 | 2013-11-20 | 罕王实业集团有限公司 | Device and technological process for recycling waste heat of high-temperature nickel slag |
| CN103528385A (en) * | 2013-10-23 | 2014-01-22 | 攀枝花钢城集团瑞丰水泥有限公司 | Grate type cooling machine |
| CN103773911A (en) * | 2014-01-02 | 2014-05-07 | 中国科学院广州能源研究所 | Liquid slag granulation and waste heat dry process fluidization high-grade cascaded recycling method and liquid slag granulation and waste heat dry process fluidization high-grade cascaded recycling system |
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| CN105154606A (en) * | 2015-10-14 | 2015-12-16 | 华北理工大学 | Blast furnace slag space atomization water quenching and high-temperature water quenching slag waste heat power generating method |
| CN106755649A (en) * | 2016-11-08 | 2017-05-31 | 游涛 | Controllable the turning over of one kind output beats the grey formula slag granulating of the anti-ease of heat exchange and heat-energy recovering apparatus |
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| CN107144149A (en) * | 2017-07-05 | 2017-09-08 | 湘潭大学 | A kind of oscillatory type high temperature furnace slag waste-heat recovery device |
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Cited By (41)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101864504A (en) * | 2010-06-24 | 2010-10-20 | 陈瑞颖 | Method for raising air temperature of hot blast stove by recovering sensible heat of blast furnace slag |
| CN101886149A (en) * | 2010-07-08 | 2010-11-17 | 无锡市东方环境工程设计研究所有限公司 | High temperature liquid slag recovery method |
| CN101886148A (en) * | 2010-07-08 | 2010-11-17 | 无锡市东方环境工程设计研究所有限公司 | Method for recovering high-temperature molten slag |
| CN101907405A (en) * | 2010-07-28 | 2010-12-08 | 鹤壁地恩地新材料科技有限公司 | Heat recovery device of magnesium smelting reducing slag |
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| CN102719579A (en) * | 2012-05-31 | 2012-10-10 | 四川川润股份有限公司 | Fluidized heat exchange device after slag of dry type granulating blast furnace |
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| CN102851416A (en) * | 2012-09-24 | 2013-01-02 | 四川环能德美科技股份有限公司 | Heat recovery method for blast furnace slag |
| CN102851416B (en) * | 2012-09-24 | 2015-11-04 | 四川环能德美科技股份有限公司 | A kind of process blast furnace slag heat energy recovering method |
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| CN102912044A (en) * | 2012-10-22 | 2013-02-06 | 李玉亮 | Novel efficient and energy-saving dry type granulating system of slag and method thereof |
| CN103014201A (en) * | 2013-01-18 | 2013-04-03 | 北京科技大学 | Device and method for gas-solid ejection and granulation of molten blast furnace slags |
| CN103014201B (en) * | 2013-01-18 | 2015-05-13 | 北京科技大学 | Device and method for gas-solid ejection and granulation of molten blast furnace slags |
| CN103398578A (en) * | 2013-07-23 | 2013-11-20 | 罕王实业集团有限公司 | Device and technological process for recycling waste heat of high-temperature nickel slag |
| CN103398578B (en) * | 2013-07-23 | 2015-08-12 | 罕王实业集团有限公司 | A kind of equipment and process method for high-temperature nickel slag waste heat recovery |
| CN103528385A (en) * | 2013-10-23 | 2014-01-22 | 攀枝花钢城集团瑞丰水泥有限公司 | Grate type cooling machine |
| CN103773911A (en) * | 2014-01-02 | 2014-05-07 | 中国科学院广州能源研究所 | Liquid slag granulation and waste heat dry process fluidization high-grade cascaded recycling method and liquid slag granulation and waste heat dry process fluidization high-grade cascaded recycling system |
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| CN106755649B (en) * | 2016-11-08 | 2018-09-25 | 游涛 | A kind of controllable turn over of output beats the grey formula slag granulating of the anti-ease of heat exchange and heat-energy recovering apparatus |
| CN106755649A (en) * | 2016-11-08 | 2017-05-31 | 游涛 | Controllable the turning over of one kind output beats the grey formula slag granulating of the anti-ease of heat exchange and heat-energy recovering apparatus |
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| WO2020206834A1 (en) * | 2019-04-11 | 2020-10-15 | 东北大学 | Method for directly cementing molten blast furnace slag |
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| CN110484664A (en) * | 2019-09-27 | 2019-11-22 | 重庆大学 | High-temperature liquid state slag centrifugal granulation residual neat recovering system creation method |
| CN111043867A (en) * | 2019-10-28 | 2020-04-21 | 鞍钢股份有限公司 | System and method for treating household garbage by utilizing ironmaking waste heat |
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