CN102424867B - Slag granulating and waste heat recovery device - Google Patents
Slag granulating and waste heat recovery device Download PDFInfo
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- CN102424867B CN102424867B CN2011104606924A CN201110460692A CN102424867B CN 102424867 B CN102424867 B CN 102424867B CN 2011104606924 A CN2011104606924 A CN 2011104606924A CN 201110460692 A CN201110460692 A CN 201110460692A CN 102424867 B CN102424867 B CN 102424867B
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- slag
- waste
- heat recovery
- recovery device
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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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- Curing Cements, Concrete, And Artificial Stone (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention provides a slag granulating and waste heat recovery device, comprising a slag pot, a slag ladle, a granulating device, a primary cooling fan, a discharge device, a secondary cooling fan, a heat exchange shaft furnace, a cyclone dust collector, a waste heat boiler, a dust collector and a chimney, wherein the slag pot is used for containing slag; a water port is arranged at the lower part of the slag ladle; the granulating device is used for granulating the slag in the slag ladle; the primary cooling fan is used for providing primary cooling air; the discharge device is used for discharging granulated slag; the secondary cooling fan is used for providing secondary cooling air; the heat exchange shaft furnace is used for performing heat exchange between the granulated slag discharged by the discharge device and the secondary cooling air; the cyclone dust collector is used for removing fine particle slag from the primary cooling air and the secondary cooling air; the waste heat boiler is used for generating high-temperature stream; the dust collector is used for collecting dust in the tail gas generated by the waste heat boiler; and the chimney is used for discharging the tail gas after dust collection. By using the slag granulating and waste heat recovery device according to the invention, no new water is consumed in the slag granulating process, the slag waste heat can be effectively recovered for power generation, and the slag vitreous body after treatment can be used as a construction raw material.
Description
Technical field
The present invention relates to a kind of slag granulation and waste-heat recovery device, specifically, relate to a kind of slag dry type granulation and waste-heat recovery device.
Background technology
Metallurgical slag is the by product of steel manufacture process, is mainly derived from ironmaking and steel making working procedure.Blast furnace slag 300～400kg that the pig iron per ton produces, converter slag 80～120kg that steel per ton produces.The treatment process of at present domestic and international blast furnace slag mainly adopts the mode of shrend, promptly with high pressure water the high-temperature liquid state blast furnace slag is washed into the solid granulates shape.The subject matter that the flush slag mode is brought is: (1) takies water resources and consumption of new water in a large number, about the flushing cinder water consumption 10t of liquid blast furnace per ton, about consumption of new water 1t.(2) wasted secondary energy, the physics heat of high-temperature liquid state blast furnace slag per ton is equivalent to about 60kg mark coal, all dissipates in the flushing cinder process.And from the angle of fire with analysis, the waste heat quality of liquid blast furnace is very high, has utility value.(3) discharging H
2S and SO
x, destroy ecotope, produce a large amount of H in the flush slag process
2S and SO
x, enter in the atmosphere with water vapour, gather the inducement that to a certain degree just becomes acid rain.
In sum, at present general metallurgical slag Water Quenching technology that adopts and metallurgical slag utilize mode, not only wasted a large amount of new water resourcess, and environment caused very serious pollution, also reduced the service efficiency of the energy and resource simultaneously.This method far can not adapt to the Development patterns of new industrialization and recycling economy, fundamentally change and discarded.
Summary of the invention
In order to overcome the problems of the prior art, the object of the present invention is to provide a kind of easy to use under hot environment, efficient is higher is used for device with slag dry type granulation and recovery waste heat.Described device comprises: slag ladle, be used to hold slag, and the inner main material of described slag ladle is a refractory brick, slag ladle diameter 0.5-1.5m, high 1-2m; Cinder ladle is used for buffering, storage slag, and the inner main material of described cinder ladle is a refractory brick, cinder ladle diameter 0.5-1m, and high 1-1.5m, the bottom is provided with the mouth of a river, mouth of a river diameter 50-100mm; Granulating device is used for the slag granulation with described cinder ladle; Discharge device is used to discharge grain slag; Cooling air is provided provide one time a cooling blower; The secondary cooling blower is used to provide the secondary cooling air; The heat exchange shaft furnace is used for grain slag and described secondary cooling air that described discharge device is discharged are carried out heat exchange, described heat exchange shaft furnace diameter 3-5m, high 5-10m; Tornado dust collector are used for removing the fine particle slag of described first cooling air and second cooling air, and described tornado dust collector inside is the high strength anti firebrick; Waste heat boiler is used to produce high-temperature steam; Fly-ash separator is used for the tail gas that described waste heat boiler produces is carried out dedusting; Chimney is discharged the tail gas after the described dedusting.
Cinder ladle in the middle of described device also comprises is used to make the slag liquid level to maintain certain altitude, and with control slag liquid dirty speed, middle cinder ladle slag liquid surface height controlling is at 1.4-1.6m, described in the middle of cinder ladle diameter 0.8-1.2m, high 1.5-2.5m.
Cinder ladle comprises the mouth of a river in the middle of described, and the described mouth of a river is provided with stopper and controls slagging speed, carries out granulated processed thereby slag liquid is added described granulating device quantitatively.
Described device also comprises the power pack that links to each other with described waste heat boiler, is used for utilizing described high-temperature steam generating.
Described device also comprises the recirculation blower that links to each other with described fly-ash separator, is used for tail gas after described waste heat boiler provides dedusting.
Described granulating device is the double pair roller pelletizer that is made of last row's roller and lower roll; the described row of going up roller carries out the granulation of slag; lower roll is to whole grain of grain slag and discharge; last row's pair roller rotating speed is controlled at 150-300r/min; linear resonance surface velocity is not more than 8m/s; last row is to roller diameter 0.5-1m, and power of motor 70-80kw, following row's power of motor 20-25kw are overlapped in last deploying.
The inner chamber of the described row's of going up roller and described lower roll all is filled with the water coolant of temperature in 0-20 ℃ scope.
The temperature of water coolant is in 0-10 ℃ scope.
The sidewall of described double pair roller pelletizer is provided with bostle pipe and nozzle, with further cooling grain slag.
Described discharge device is a lock gas removal device, is made by high temperature steel, and rotating speed is 25-40r/min, and the revolution withdrawal rate is 40 liters, adopts the variable frequency regulating speed control withdrawal rate, and power of motor is 4kw.
Adopt slag granulation of the present invention and waste-heat recovery device; make slag treatment not have new water consumption, can reclaim 600-700 ℃ of flue gas, heat recovery efficiency 60-80%; slag vitreum content after handling simultaneously is greater than 95%, for example can be used as the building materials raw material and is used.
Description of drawings
By the description of the exemplary embodiment of carrying out below in conjunction with accompanying drawing, these and/or other aspect of the present invention and advantage will become obviously and be easier to and understand, in the accompanying drawing:
Fig. 1 illustrates the synoptic diagram of slag granulation and waste-heat recovery device according to an exemplary embodiment of the present invention.
Fig. 2 is the partial enlarged view of Fig. 1.
The drawing reference numeral explanation:
1 slag ladle, 2 cinder ladles
Cinder ladle 4 nozzles in the middle of 3
5 sizings/6 cooling blowers of slip water
7 granulating devices, 8 discharge devices
9 heat exchange shaft furnaces, 10 secondary cooling blowers
11 tornado dust collector, 12 waste heat boilers
13 generating set, 14 fly-ash separators
15 recirculation blowers, 16 chimneys
Embodiment
See figures.1.and.2, comprise: slag ladle 1, cinder ladle 2, nozzle 4, cooling blower 6, granulating device 7, discharge device 8, heat exchange shaft furnace 9, secondary cooling blower 10, tornado dust collector 11, waste heat boiler 12, fly-ash separator 14, chimney 16 according to slag granulation of the present invention and waste-heat recovery device.
The bottom of cinder ladle 2 is provided with mouth of a river (not shown), flows to control slag liquid and carries out granulated processed in the granulating device 7, and wherein, the described mouth of a river can be a slide gate nozzle.The inner main material of cinder ladle is a refractory brick, cinder ladle diameter 0.5-1m, high 1-1.5m.
The double pair roller pelletizer that granulating device 7 can be made up of the two rows pair roller.Last row roller carries out the granulation of slag, and lower roll is to whole grain of grain slag and discharge, on arrange the pair roller rotating speed and be controlled at 150-300r/min; linear resonance surface velocity is not more than 8m/s; last row is to roller diameter 0.5-1m, and power of motor 70-80kw, following row's power of motor 20-25kw are overlapped in last deploying.Last row roller and down the inner chamber that rolls of row all to be filled with temperature range be 0-20 ℃ water coolant.Preferably, the temperature of water coolant is 0-10 ℃.Roll surface temperature through cooling process is lower than 300 ℃, crusts fast with the slag that guarantees the roll surface place.The invention is not restricted to this, can also use other dry type granulating devices.
In reference exemplary embodiment of the present invention shown in Figure 1, cinder ladle 3 in the middle of slag granulation and waste-heat recovery device also comprise is so that the slag liquid level maintains certain altitude, with the dirty speed of control slag liquid.Cinder ladle 3 in the middle of the slide gate nozzle control slag liquid that is provided with in cinder ladle 2 bottoms flows to.Middle cinder ladle slag liquid surface height controlling is at 1.4-1.6m, slag notch diameter 60-100mm, and tundish diameter 0.8-1.2m, high 1.5-2.5m, slag notch is provided with stopper, control slagging speed.The bottom of middle cinder ladle 3 is provided with sizing/slide gate nozzle 5, carries out granulated processed in the granulating device 7 thereby slag liquid is flowed into quantitatively, and wherein, slide gate nozzle can be realized by stopper.
The sidewall of granulating device 7 is provided with bostle pipe (not shown) and high-velocity nozzle 4, sprays into the cooling air that cooling blower 6 blows out by high-velocity nozzle 4, crusts again thereby make by the grain slag of the band liquid core of granulating device 7 broken shells.In this process, the freezing air temperature raises gradually, and the grain slag temperature descends gradually.Cool off a back cooling air temperature and be about 500 ℃, the grain slag temperature is lower than 750 ℃, has prevented that effectively grain slag from luming again.Cooling blower type selecting parameter: air quantity 70000m
3/ h, blast 4000Pa, wind speed 10-20m/s in the necessary electromotor power 100-120kw, bostle pipe, pipe diameter 1200-1300mm, a wind exhaust duct diameter 2000mm.
Grain slag enters bottom heat exchange shaft furnace 9 by discharge device 8.Discharge device 8 can be star-like lock gas removal device, and lock gas removal device adopts high temperature steel to make, and rotating speed is 25-40r/min, and the revolution withdrawal rate is 40 liters, adopts the variable frequency regulating speed control withdrawal rate, and power of motor is 4kw, but the invention is not restricted to this.The secondary cooling air countercurrent flow that high temperature grain slag and secondary cooling blower 10 blow out, the freezing air temperature raises gradually, and the grain slag temperature descends once more gradually.Secondary cooling air temperature rises to about 700 ℃.Finally, grain slag is discharged by the slag discharging device (not shown), and outflow temperature is not higher than 150 ℃.Cooling air and secondary cooling air are collected by the effuser on heat exchange shaft furnace 9 tops and are mixed, and mixed gas is discharged from and enters tornado dust collector 11 then, thereby remove the fine particle slag.Secondary cooling blower type selecting parameter: air quantity 60000m3/h, blast 20000Pa, necessary electromotor power 500kw.
Gas after the dedusting enters waste heat boiler 12, produces high temperature and high pressure steam, can be used to the steam that is produced by power pack 13 generatings.Power pack 13 can be the steam turbine generating set.The exhaust temperature that boiler is discharged after the heat exchange is lower than 150 ℃, introduce fly-ash separator 14 by the induced draft fan (not shown), a part of gas enters chimney 16 after the dedusting, and the circulation of a part of gas by recirculation blower 15 blasts in the ventilation shaft furnace 9 as the secondary cooling air, can reduce heat and dissipate.Wherein, fly-ash separator 14 can be a sack cleaner, but the invention is not restricted to this.The slag of discharging from heat exchange shaft furnace 9 bottoms with the dirt ash of removing by being transported to fixedly stockyard.Heat exchange shaft furnace diameter 3-5m, high 5-10m.
Utilization is according to slag granulation of the present invention and waste-heat recovery device, and no new water consumption in the slag granulating can be reclaimed melting slag waste heat effectively and is used for generating etc. in the slag granulation.In addition, treated slag can also be used as for example building materials raw material.
It will be apparent to those skilled in the art, under the situation that does not break away from the spirit or scope of the present invention, can make various modifications and change the present invention.Therefore, the present invention is intended to cover modification of the present invention and change, as long as these modifications and change drop on the scope of claim and equivalent thereof.
Claims (8)
1. slag granulation and waste-heat recovery device, described slag granulation and waste-heat recovery device comprise:
Slag ladle is used to hold slag, and the inner main material of described slag ladle is a refractory brick, slag ladle diameter 0.5-1.5m, high 1-2m;
Cinder ladle is used for buffering, storage slag, and the inner main material of described cinder ladle is a refractory brick, cinder ladle diameter 0.5-1m, and high 1-1.5m, the bottom is provided with the mouth of a river, mouth of a river diameter 50-100mm;
Granulating device is used for the slag granulation with described cinder ladle;
Discharge device is used to discharge grain slag;
Cooling air is provided provide one time a cooling blower;
The secondary cooling blower is used to provide the secondary cooling air;
The heat exchange shaft furnace is used for grain slag and described secondary cooling air that described discharge device is discharged are carried out heat exchange, described heat exchange shaft furnace diameter 3-5m, high 5-10m;
Tornado dust collector are used for removing the fine particle slag of described first cooling air and second cooling air, and described tornado dust collector inside is the high strength anti firebrick;
Waste heat boiler is used to produce high-temperature steam;
Fly-ash separator is used for the tail gas that described waste heat boiler produces is carried out dedusting;
Chimney is discharged the tail gas after the described dedusting,
Wherein, described granulating device is the double pair roller pelletizer that is made of last row's roller and lower roll, the described row of going up roller carries out the granulation of slag, lower roll is to whole grain of grain slag and discharge, last row's pair roller rotating speed is controlled at 150-300r/min, and linear resonance surface velocity is not more than 8m/s, and last row is to roller diameter 0.5-1m, last deploying cover power of motor 70-80kw, following row's power of motor 20-25kw; The inner chamber of the described row's of going up roller and described lower roll all is filled with the water coolant of temperature in 0-20 ℃ scope.
2. slag granulation as claimed in claim 1 and waste-heat recovery device; cinder ladle in the middle of described slag granulation and waste-heat recovery device also comprise; be used to make the slag liquid level to maintain certain altitude; with the dirty speed of control slag liquid; middle cinder ladle slag liquid surface height controlling is at 1.4-1.6m; cinder ladle diameter 0.8-1.2m in the middle of described, high 1.5-2.5m.
3. slag granulation as claimed in claim 2 and waste-heat recovery device, wherein, described middle cinder ladle comprises the mouth of a river, the described mouth of a river is provided with stopper and controls slagging speed, carries out granulated processed thereby slag liquid is added described granulating device quantitatively.
4. slag granulation as claimed in claim 1 or 2 and waste-heat recovery device, described slag granulation also comprises the power pack that links to each other with described waste heat boiler with waste-heat recovery device, is used for utilizing described high-temperature steam generating.
5. slag granulation as claimed in claim 1 or 2 and waste-heat recovery device, described slag granulation also comprises the recirculation blower that links to each other with described fly-ash separator with waste-heat recovery device, is used for tail gas after described waste heat boiler provides dedusting.
6. slag granulation as claimed in claim 1 and waste-heat recovery device, wherein, the temperature of water coolant is in 0-10 ℃ scope.
7. slag granulation as claimed in claim 1 and waste-heat recovery device, wherein, the sidewall of described double pair roller pelletizer is provided with bostle pipe and nozzle, with further cooling grain slag.
8. slag granulation as claimed in claim 1 or 2 and waste-heat recovery device, wherein, described discharge device is a lock gas removal device; made by high temperature steel, rotating speed is 25-40r/min, and the revolution withdrawal rate is 40 liters; adopt the variable frequency regulating speed control withdrawal rate, power of motor is 4kw.
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| CN2011104606924A CN102424867B (en) | 2011-12-31 | 2011-12-31 | Slag granulating and waste heat recovery device |
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| CN2011104606924A CN102424867B (en) | 2011-12-31 | 2011-12-31 | Slag granulating and waste heat recovery device |
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| CN102424867A CN102424867A (en) | 2012-04-25 |
| CN102424867B true CN102424867B (en) | 2013-07-31 |
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| CN2011104606924A Expired - Fee Related CN102424867B (en) | 2011-12-31 | 2011-12-31 | Slag granulating and waste heat recovery device |
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| CN102888473B (en) * | 2012-10-01 | 2014-02-19 | 许征鹏 | Blast furnace slag granulation and waste heat recovery device |
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| CN111270027B (en) * | 2020-03-13 | 2021-05-07 | 钢铁研究总院 | High-temperature liquid cooling method |
| CN111351340B (en) * | 2020-03-13 | 2021-05-07 | 钢铁研究总院 | High-temperature liquid cooling device |
| CN118189657B (en) * | 2024-05-20 | 2024-07-19 | 思源交大河北科技有限公司 | Steel slag waste heat utilization system |
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