CN103160624B - Device for using sensible heat of blast furnace slag with high efficiency - Google Patents
Device for using sensible heat of blast furnace slag with high efficiency Download PDFInfo
- Publication number
- CN103160624B CN103160624B CN201310068901.XA CN201310068901A CN103160624B CN 103160624 B CN103160624 B CN 103160624B CN 201310068901 A CN201310068901 A CN 201310068901A CN 103160624 B CN103160624 B CN 103160624B
- Authority
- CN
- China
- Prior art keywords
- blast furnace
- sensible heat
- fluidized bed
- circulating fluidized
- slag
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000002893 slag Substances 0.000 title abstract description 36
- 238000007789 sealing Methods 0.000 claims abstract description 6
- 239000011400 blast furnace cement Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 239000003570 air Substances 0.000 description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 238000000034 method Methods 0.000 description 4
- 238000010791 quenching Methods 0.000 description 4
- 230000000171 quenching effect Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000005469 granulation Methods 0.000 description 2
- 230000003179 granulation Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Classifications
-
- 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
- C21B2400/026—Methods of cooling or quenching molten slag using air, inert gases or removable conductive bodies
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/05—Apparatus features
- C21B2400/066—Receptacle features where the slag is treated
- C21B2400/076—Fluidised bed for cooling
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/08—Treatment of slags originating from iron or steel processes with energy recovery
-
- 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
- Y02P10/25—Process efficiency
-
- 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
Landscapes
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Furnace Details (AREA)
Abstract
The invention relates to a device for using sensible heat of blast furnace slag with high efficiency, which is characterized by comprising a blast furnace (1), a circulating fluidized bed (3) and a steam turbine (5). A sealing launder (2) is provided at the outlet of the blast furnace (1) and the inlet of the circulating fluidized bed (3), the upper part of the circulating fluidized bed (3) is connected to the steam turbine (5), and a secondary tuyere (6) and a feeding port (7) are arranged on the circulating fluidized bed (3). The device for using sensible heat of blast furnace slag ensures the resource utilization of the blast furnace slag, the sensible heat of hot molten slag can be used in a possible mode, and the device for using sensible heat of blast furnace slag acquire good economic and environmental benefits.
Description
Technical field
The present invention relates to a kind of device utilizing blast-furnace cement sensible heat.Belong to the field of UTILIZATION OF VESIDUAL HEAT IN.
Background technology
At present, iron and steel enterprise is in blast furnace production process, and often produce 1 ton of pig iron and about produce 300kg liquid blast furnace, the temperature of these hot slag is about 1400 ~ 1600 DEG C, and the sensible heat of hot slag per ton about containing 1700MJ, is equivalent to the calorific value of 58kg standard coal.With 1 3200m
3blast furnace be example, per hourly about produce 100t hot slag, be equivalent to the calorific value of 5.8t standard coal, be enough to produce the high-grade steam of 40t/h.From the eighties in 20th century, some developed countries are if Japan, the U.S., Britain, Germany etc. are just from the angle of energy saving standard in the world, active development hot slag sensible heat resource.The sensible heat recovery method of current hot slag is roughly divided into two classes: a class utilizes recirculated air to reclaim slag sensible heat, then reclaims sensible heat as a vapor by waste heat boiler, as wind is quenched method; Another kind of is inject in container by high temperature furnace slag, and around container water cycle cools, and reclaims slag sensible heat in vapour form, as annular bed method.No matter which kind of method above-mentioned, is still in the type approval test stage at present abroad, its heat recuperation rate reaches as high as about 70%, but because economic return is poor, equipment enlarging difficulty is comparatively large, all sensible heat utilization technology all fail to realize industrial applications.Most of Steel Plant of China then adopt water quenching, and hot slag is at high temperature used water at low temperature quenching, obtain the high added value slag particle of more than 90% glass rate, for the additive of the products such as cement.The shortcoming of water quenching is: the sensible heat of blast furnace slag cannot utilize, and causes a large amount of wastes of water resources, also result in pollution in various degree, aggravating working environment to air, water and soil.Therefore, blast furnace slag granulation and efficient higher-grade Exposure degree are the technical bottlenecks that present steel industry value chain is urgently broken through, the focus of Ye Shi China energy-saving and emission-reduction.
Summary of the invention
The object of the invention is to overcome above-mentioned deficiency, a kind of device of efficiency utilization blast-furnace cement sensible heat is provided, solve the unserviceable problem of blast-furnace cement sensible heat, solve the various pollution problems that existing water quenching exists simultaneously.
The object of the present invention is achieved like this: a kind of device of efficiency utilization blast-furnace cement sensible heat, it comprises blast furnace, circulating fluidized bed and steam turbine, the exit of described blast furnace and the ingress of circulating fluidized bed are provided with sealing chute, described circulating fluidized bed top is connected with steam turbine, and described circulating fluidized bed is provided with overfiren air port and material inlet.
The hot slag of more than 1400 DEG C of being discharged by blast furnace is by the bottom of being introduced circular fluid bed by sealing chute; upwards sent into through air distribution plate by bottom blast furnace by pressurized air; hot slag is jetted by high-speed air, granulation; the sensible heat of hot slag brings burner hearth inside into by air and grain slag; and pass to the water pipe heating surface of burner hearth internal layout; the sensible heat of more than 90% is all changed into the superheated vapour of High Temperature High Pressure by hot slag, send into steam turbine power generation.
Compressed-air actuated flow velocity and pressure can adjust according to the flow of hot slag, to ensure the effect that hot slag is granulated.Because blast furnace slag is discharged from blast furnace off and on, in order to realize the continuity of boiler producing steam, blast furnace 1 is also provided with an overfiren air port 6 and a material inlet 7, when blast furnace slag interruption or decrement, material inlet postcombustion can be passed through, increase combustion air at overfiren air port, to ensure that burner hearth internal heat resource is continuous, stable simultaneously.
Compared with prior art, the present invention has following beneficial effect:
1, the hot slag sensible heat of interruption is converted into continuous print superheated vapour, and generates electricity;
2, hot slag is admitted to burner hearth completely, and sensible heat utilization rate is high;
3, hot slag is at high temperature cooled rapidly by pressurized air, and slag particleization is effective, uniform diameter, and in product, glassy phase is greater than 90%, can be used in the productions such as cement completely;
4, inner at circulating fluidized bed, grain slag and burner hearth internal surface good effect of heat exchange, equipment investment cost is low.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Wherein: blast furnace 1
Sealing chute 2
Circulating fluidized bed 3
Pressurized air 4
Steam turbine 5
Overfiren air port 6
Material inlet 7.
Embodiment
See Fig. 1, the present invention relates to a kind of device of efficiency utilization blast-furnace cement sensible heat, comprise blast furnace 1, circulating fluidized bed 3 and steam turbine 5, sealing chute 2 is provided with in the exit of described blast furnace 1 and the ingress of circulating fluidized bed 3, the top of described circulating fluidized bed 3 is connected with steam turbine 5, and described circulating fluidized bed 3 is provided with overfiren air port 6 and material inlet 7.
Certain blast furnace is 3200m
3, on average about generation 100t hot slag per hour, within every 2.5 hours, slag tap once, the time length of slagging tap is 2 hours, interrupts 0.5 hour.After adopting the present invention, the hot slag sensible heat of 90% is converted into superheated vapour, when slagging tap interruption, supplement with steel mill's blast furnace gas, circular fluid bed generation higher-grade per hour superheated vapour 42t, the scale of auxiliary generator group is 8MW, and calculate with the electricity price of 0.5 yuan/kWh, annual income can reach 3,200 ten thousand yuan.Under the prerequisite of use value not affecting grain slag, water resource waste and environmental pollution can also be avoided, not only there is higher economic benefit, but also had good environmental benefit.
Claims (1)
1. the device of an efficiency utilization blast-furnace cement sensible heat, it is characterized in that it comprises blast furnace (1), circulating fluidized bed (3) and steam turbine (5), the ingress of the exit of described blast furnace (1) and circulating fluidized bed (3) is provided with sealing chute (2), described circulating fluidized bed (3) top is connected with steam turbine (5), and described circulating fluidized bed (3) is provided with overfiren air port (6) and material inlet (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310068901.XA CN103160624B (en) | 2013-03-05 | 2013-03-05 | Device for using sensible heat of blast furnace slag with high efficiency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310068901.XA CN103160624B (en) | 2013-03-05 | 2013-03-05 | Device for using sensible heat of blast furnace slag with high efficiency |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103160624A CN103160624A (en) | 2013-06-19 |
| CN103160624B true CN103160624B (en) | 2015-02-11 |
Family
ID=48584158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310068901.XA Expired - Fee Related CN103160624B (en) | 2013-03-05 | 2013-03-05 | Device for using sensible heat of blast furnace slag with high efficiency |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103160624B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105910447B (en) * | 2016-05-25 | 2018-04-20 | 来江 | A kind of metallurgical red slag Exposure degree utilizes system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101550460A (en) * | 2009-05-08 | 2009-10-07 | 清华大学 | Method and apparatus of blast furnace slag quench and heat recovery |
| CN101709338A (en) * | 2009-12-11 | 2010-05-19 | 中冶京诚工程技术有限公司 | Half-wet method slag processing system and method |
| 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 |
| CN202658165U (en) * | 2012-05-31 | 2013-01-09 | 四川川润股份有限公司 | System for processing blast-furnace slag by dry method and continuously adopting waste heat |
| CN203159633U (en) * | 2013-03-05 | 2013-08-28 | 江苏一同环保工程技术有限公司 | Device for efficiently utilizing blast furnace slag sensible heat |
-
2013
- 2013-03-05 CN CN201310068901.XA patent/CN103160624B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101550460A (en) * | 2009-05-08 | 2009-10-07 | 清华大学 | Method and apparatus of blast furnace slag quench and heat recovery |
| CN101709338A (en) * | 2009-12-11 | 2010-05-19 | 中冶京诚工程技术有限公司 | Half-wet method slag processing system and method |
| 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 |
| CN202658165U (en) * | 2012-05-31 | 2013-01-09 | 四川川润股份有限公司 | System for processing blast-furnace slag by dry method and continuously adopting waste heat |
| CN203159633U (en) * | 2013-03-05 | 2013-08-28 | 江苏一同环保工程技术有限公司 | Device for efficiently utilizing blast furnace slag sensible heat |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103160624A (en) | 2013-06-19 |
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