CN102618674B - Total heat recovery system for molten blast furnace slag - Google Patents
Total heat recovery system for molten blast furnace slag Download PDFInfo
- Publication number
- CN102618674B CN102618674B CN201210084807.9A CN201210084807A CN102618674B CN 102618674 B CN102618674 B CN 102618674B CN 201210084807 A CN201210084807 A CN 201210084807A CN 102618674 B CN102618674 B CN 102618674B
- Authority
- CN
- China
- Prior art keywords
- blast furnace
- furnace slag
- pressure steam
- heat recovery
- recovery system
- 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 claims abstract description 66
- 238000011084 recovery Methods 0.000 title claims abstract description 21
- 238000003860 storage Methods 0.000 claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 238000010438 heat treatment Methods 0.000 claims abstract description 5
- 238000009413 insulation Methods 0.000 claims description 14
- 230000001105 regulatory effect Effects 0.000 claims description 13
- 239000002184 metal Substances 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 238000013461 design Methods 0.000 claims description 5
- 230000005484 gravity Effects 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims description 2
- 239000007921 spray Substances 0.000 claims description 2
- 239000002918 waste heat Substances 0.000 abstract description 5
- 238000004064 recycling Methods 0.000 abstract description 3
- 238000002347 injection Methods 0.000 abstract 1
- 239000007924 injection Substances 0.000 abstract 1
- 239000002245 particle Substances 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 229910052742 iron Inorganic materials 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000011400 blast furnace cement Substances 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 238000009856 non-ferrous metallurgy Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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)
Abstract
The invention discloses a total heat recovery system for molten blast furnace slag, which solves the problem that waste heat of blast furnace slag is low in utilization rate in the prior art. Molten blast furnace slag can be poured into a high-pressure steam tank filled with water, water generates a great deal of steam upon high heat, the blast furnace slag is broken into particles, and the generated steam is recycled through a high-pressure steam tank. Devices include a slag feeding hopper, a conveying and storage passage and the high-pressure steam tank for recycling steam. The conveying and storage passage is provided with an insulating device and a heating device, and the upper end and the lower end of the conveying and storage passage are connected with the slag feeding hopper and the high-pressure steam tank respectively. The upper portion of the high-pressure steam tank is provided with a water injection hole and a steam outlet, and the lower portion of the high-pressure steam tank is provided with a slagging device. The system fully utilizes total heat (sensible heat and latent heat) of the blast furnace slag, and the efficiency of recycling waste heat of the blast furnace slag is improved.
Description
Technical field
The present invention relates to energy recovery and utilize field, especially the full heat recovery system of molten state blast furnace slag in iron and steel, nonferrous metallurgy industry.
Background technology
China Steel, metallurgical industry are the maximum industries of energy consumption, and energy consumption accounts for 10 ~ 15% of national total energy consumption.The Production Flow Chart of iron and steel is Iron-smelting and steel making working procedure, and iron manufacturing process energy expenditure is maximum, and in iron manufacturing process, 1 ton of iron of every refining approximately produces the blast furnace slag that 0.34 ton of temperature is 1400 DEG C of left and right, and the contained heat energy of blast furnace slag is considerable.
At present, the processing of blast furnace slag adopts water quenching mostly, blast furnace slag by melting is poured into water, water is met high temperature and is blasted, and blast furnace slag is broken into particulate, and produces a large amount of steam, the deficiency of this method is: not only the waste heat of blast furnace slag cannot utilize, and cause a large amount of wastes of water resources, and atmosphere, water and soil have also been caused to serious pollution, worsen environment.
Application number is 200810229556.2(" blast-furnace cement sensible heat recovery system "), 200910187586.6(" molten blast furnace slag sensible heat recovery method and device ") and 201120063272.8(" reclaim high-temperature sensible heat of molten blast furnace slag system ") Chinese patent, all the recyclings to blast-furnace cement sensible heat, and the latent heat of blast furnace slag is wasted, reduce the utilization ratio of blast furnace slag.
Summary of the invention
The technical problem to be solved in the present invention is to provide the full heat recovery system of a kind of molten state blast furnace slag, its blast furnace slag by molten state is directly poured into water, the latent heat of blast furnace slag and sensible heat all exchange with water, the steam producing is recovered utilization, improved the utilization ratio of blast furnace slag waste heat, and the present invention is simple in structure.
For solving the problems of the technologies described above, the technical scheme that the present invention takes is:
The full heat recovery system of a kind of molten state blast furnace slag, the defeated storage passage that comprises dreg-inlet hopper, be communicated with described dreg-inlet hopper bottom and the control unit of system, crucial improvement is, described defeated storage passage is provided with insulation and heating unit, bottom are communicated with airtight high pressure steam tank; The top of described high pressure steam tank is provided with water filling port and vapour outlet, bottom are provided with deslagging device.
Described defeated storage passage is to be connected into the passage that is highly not less than h by flange by channel unit;
Wherein
;
In above formula
for the height of defeated storage passage, the m of unit;
for the design pressure of high pressure steam tank, the N/m of unit
2;
for the density of blast furnace slag, units/kg/m
3;
for gravity coefficient, unit is N/kg.
The bottom of described defeated storage passage is provided with slide valve.
The present invention directly carries out heat exchange with water by molten state blast furnace slag, and latent heat and sensible heat are all absorbed by water, and the high pressure steam producing in high pressure steam tank is done work or other purposes for steam turbine.
The beneficial effect that adopts technique scheme to produce is: 1) defeated storage passage of the present invention has adopted insulation and heating unit, blast furnace slag is not hardened in defeated storage passage, carry out heat exchange thereby take full advantage of blast furnace slag net quantity of heat (sensible heat and latent heat) with water, improved blast furnace slag heat recovery rate;
2) high pressure steam of blast furnace slag and water generates can be used for steam turbine acting, carries out heat exchange etc. with other medium;
3) steam condensation after heat exchange, water of condensation is reusable edible also, has reduced the consumption of new water;
4) defeated storage passage both can be for the circulation of blast furnace slag, in further improved plan, and also can be for the storage of blast furnace slag in the time that slide valve is closed; Because the generation of blast furnace slag is discontinuous, in the time having a large amount of blast furnace slags to produce, vapor pressure in high pressure steam tank also can increase, now need blast furnace slag to be temporarily stored in defeated storage passage, prevent on the one hand that high pressure steam pressure tank is too large and cause danger, can meet on the other hand in the time that blast furnace does not produce blast furnace slag, full heat recovery device can continuous firing.
Brief description of the drawings
Fig. 1 is surface structure schematic diagram of the present invention;
Fig. 2 be channel unit of the present invention partly cut open structural representation;
1, dreg-inlet hopper, 2, channel unit, 3, vapour outlet, 4, relief valve connection, 5, water filling port, 6, high pressure steam tank, 7, slide valve, 8, defeated storage passage, 9-1, one-level ball valve, 9-2, secondary ball valve, 9-3, pressure regulating chamber, 9-4, relief valve, 2-1, flange hole, 2-2, metal shell, 2-3, temperature sensor, 2-4, location grid, 2-5, flame jet, 2-6, thermal insulation layer, 2-7, refractory masses, 2-8, draw ring, 2-9, flange, 2-10, cavity.
Be elaborated below in conjunction with embodiment.
Embodiment
Structural representation of the present invention is referring to Fig. 1 and Fig. 2, the defeated storage passage 8 that it comprises dreg-inlet hopper 1 and is communicated with described dreg-inlet hopper 1 bottom, and described defeated storage passage 8 is provided with insulation and heating unit, bottom are communicated with airtight high pressure steam tank 6; The top of described high pressure steam tank 6 is provided with water filling port 5 and vapour outlet 3, bottom are provided with deslagging device.
Described high pressure steam tank 6 transverse inclinations are fixed, and prevent that on the one hand the blast furnace slag particulate generating from all getting lodged in slag notch, tilt on the other hand fixing, can make blast furnace slag particulate slowly slide into slag notch with action of gravity.
The top of described high pressure steam tank 6 is also provided with relief valve connection 4, water level gauge and/or weather gauge.For monitoring water level, the air pressure etc. in high pressure steam tank 6.In the time that air pressure exceedes set(ting)value, by relief valve connection 4 pressure releases; In the time that water level is not enough, by boosting step by step to the interior make up water of high pressure steam tank 6.
Described defeated storage passage 8 is connected into the passage that is highly not less than h by flange 2-9 by channel unit 2;
Wherein
;
In above formula
for the height of defeated storage passage 8, the m of unit;
for the design pressure of high pressure steam tank 6, the N/m of unit
2;
for the density of blast furnace slag, units/kg/m
3;
for gravity coefficient, unit is N/kg.Adjacent channel unit 2 is connected with bolt by the flange hole 2-1 on flange 2-9, between adjacency channel unit 2, seal with refractory materials.
The sidewall of described channel unit 2 comprises metal shell 2-2, thermal insulation layer 2-6 and refractory masses 2-7 outside to inside; In described compound sidewall, be provided with the temperature sensor 2-3 for measuring thermal insulation layer 2-6, refractory masses and channel unit cavity 2-10, be also provided with the flame jet 2-5 that sprays to cavity 2-10.Adopt the composite structure of metal shell 2-2, thermal insulation layer 2-6 and refractory masses 2-7, not only guarantee the physical strength of channel unit 2, and reach the effect of insulation; Be provided with flame jet 2-5, can prevent that blast furnace slag from solidifying in defeated storage passage 8 hardens and stops up defeated storage passage 8.Temperature sensor 2-3 is for monitoring the temperature of cavity 2-10 and refractory masses 2-7, thermal insulation layer 2-6, to find out the situation in defeated storage passage 8.
Described metal shell 2-2 is provided with the location grid 2-4 of auxiliary positioning thermal insulation layer 2-6 and refractory masses 2-7, has further strengthened the physical strength of channel unit 2.
The bottom of described defeated storage passage 8 is provided with slide valve 7.In the time that in high pressure steam tank 6, pressure approaches design pressure more greatly, open slide valve 7, blast furnace slag is temporarily stored in defeated storage passage 8.Prevent on the one hand that high pressure steam tank 6 internal pressures are too large and cause danger, can meet on the other hand blast furnace slag when discontinuous, the non-stop run of waste-heat recovery device of the present invention.
The outer side wall of described channel unit 2 is provided with the draw ring 2-8 of lifting, location.Described draw ring 2-8 both can be used for the lifting use that channel unit 2 connects, and can after lifting complete, for connecting lacing wire, defeated storage passage 8 be reinforced, be located again.
Described deslagging device comprise with high pressure steam tank 6 outlet be connected one-level ball valve 9-1, the pressure regulating chamber 9-3 being connected with described one-level ball valve 9-1 and the secondary ball valve 9-2 being connected with described pressure regulating chamber 9-3, described pressure regulating chamber 9-3 is provided with relief valve 9-4.In the time that needs are slagged tap, first by relief valve 9-4, the pressure of pressure regulating chamber 9-3 is adjusted to quite with described high pressure steam tank 6, secondary ball valve 9-2 is closed; The one-level ball valve 9-1 being communicated with high pressure steam tank 6 is opened, grain slag enters in pressure regulating chamber 9-3 by one-level ball valve 9-1 again; Finally one-level ball valve 9-1 is closed, by relief valve 9-4 pressure release, secondary ball valve 9-2 is opened, grain slag draws off from pressure regulating chamber 9-3.
The present invention also comprises control unit, and the output terminal of described control unit connects respectively the control end of slide valve 7, a spherical ball valve 9-1, secondary ball valve 9-2, relief valve 9-4; The input terminus of control unit described in described water level gauge, barometrical output termination.
The use of system of the present invention: 1. reach predetermined position by water filling port 5 to the interior water filling of high-pressure evaporation tank 6;
2. blast furnace slag flows in the water in high pressure steam tank 6 via dreg-inlet hopper 1, defeated storage passage 8, blast furnace slag and hydrothermal exchange, produce a large amount of steam, slag is broken into particulate and is cooled to below 150 DEG C, the steam of generation is exported and is utilized through vapour outlet 3;
In heat exchanging process, water level gauge and barometrical data information transfer, to control unit, in the time that water level is lower, press to water filling in high pressure steam tank 6 by adding step by step; In the time that air pressure is higher, control slide valve 7 closures, blast furnace slag is temporarily stored in defeated storage passage 8; After in the time that air pressure drops to certain value, then slide valve 7 is opened, blast furnace slag adds in airtight high pressure steam tank 6; In the time that the pressure in high pressure steam tank 6 exceedes design load, the safe pressure valve pressure release that also can arrange by its top.
3. the particulate of blast furnace slag is discharged via the deslagging device that is connected with high pressure steam tank 6, first secondary ball valve 9-2 is closed, by relief valve 9-4 by the pressure of pressure regulating chamber 9-3 be adjusted to described high pressure steam tank 6 in pressure suitable; The one-level ball valve 9-1 being communicated with high pressure steam tank 6 is opened, grain slag enters in pressure regulating chamber 9-3 by one-level ball valve 9-1 again; Finally one-level ball valve 9-1 is closed, by relief valve 9-4 pressure release, secondary ball valve 9-2 is opened, grain slag draws off from pressure regulating chamber 9-3.
Claims (9)
1. the full heat recovery system of molten state blast furnace slag, the defeated storage passage (8) that structure comprises dreg-inlet hopper (1), be communicated with described dreg-inlet hopper (1) bottom and the control unit of system, is characterized in that described defeated storage passage (8) is provided with insulation and heating unit, bottom are communicated with airtight high pressure steam tank (6); The top of described high pressure steam tank (6) is provided with water filling port (5) and vapour outlet (3), bottom are provided with deslagging device; Described defeated storage passage (8) is the passage that is highly not less than h,
;
In above formula
for the height of defeated storage passage (8), the m of unit;
for the design pressure of high pressure steam tank (6), the N/m of unit
2;
for the density of blast furnace slag, units/kg/m
3;
for gravity coefficient, unit is N/kg.
2. the full heat recovery system of molten state blast furnace slag according to claim 1, is characterized in that described defeated storage passage (8) is to connect into by flange (2-9) passage that is highly not less than h by channel unit (2).
3. the full heat recovery system of molten state blast furnace slag according to claim 2, is characterized in that in the structure of described channel unit (2), ecto-entad comprises metal shell (2-2), thermal insulation layer (2-6) and refractory masses (2-7) successively; In the compound sidewall of described channel unit (2), be provided with the temperature sensor (2-3) of the cavity (2-10) for measuring thermal insulation layer (2-6), refractory masses (2-7) and/or channel unit and spray to the inner flame jet (2-5) of cavity (2-10).
4. the full heat recovery system of molten state blast furnace slag according to claim 3, is characterized in that described metal shell (2-2) is provided with the location grid (2-4) of auxiliary positioning thermal insulation layer (2-6) and refractory masses (2-7).
5. the full heat recovery system of molten state blast furnace slag according to claim 1, is characterized in that the bottom of described defeated storage passage (8) is provided with slide valve (7).
6. the full heat recovery system of molten state blast furnace slag according to claim 1, is characterized in that the top of described high pressure steam tank (6) is also provided with relief valve connection (4), water level gauge and/or weather gauge.
7. the full heat recovery system of molten state blast furnace slag according to claim 1, it is characterized in that comprising with high pressure steam tank (6) outlet with described deslagging device be connected one-level ball valve (9-1), the pressure regulating chamber (9-3) being connected with described one-level ball valve (9-1) and the secondary ball valve (9-2) being connected with described pressure regulating chamber (9-3), described pressure regulating chamber (9-3) is provided with relief valve (9-4).
8. the full heat recovery system of molten state blast furnace slag according to claim 2, is characterized in that described channel unit (2) outer side wall is provided with the draw ring (2-8) of lifting, location.
9. the full heat recovery system of molten state blast furnace slag according to claim 1, is characterized in that described high pressure steam tank (6) transverse inclination fixes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210084807.9A CN102618674B (en) | 2012-03-28 | 2012-03-28 | Total heat recovery system for molten blast furnace slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210084807.9A CN102618674B (en) | 2012-03-28 | 2012-03-28 | Total heat recovery system for molten blast furnace slag |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102618674A CN102618674A (en) | 2012-08-01 |
| CN102618674B true CN102618674B (en) | 2014-08-06 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210084807.9A Expired - Fee Related CN102618674B (en) | 2012-03-28 | 2012-03-28 | Total heat recovery system for molten blast furnace slag |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104709930B (en) * | 2013-12-17 | 2016-05-18 | 贵阳铝镁设计研究院有限公司 | A kind of method and interface structure that improves the evaporation equipment detecting instrument life-span |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4548162A (en) * | 1984-10-22 | 1985-10-22 | Combustion Engineering, Inc. | Slagging heat recovery unit with potassium seed recovery |
| CN1888082A (en) * | 2006-07-20 | 2007-01-03 | 重庆大学 | Liquid blast furnace slag heat recovering apparatus and method |
| CN101550460A (en) * | 2009-05-08 | 2009-10-07 | 清华大学 | Method and apparatus of blast furnace slag quench and heat recovery |
| CN102304594A (en) * | 2011-09-29 | 2012-01-04 | 魏明 | Slag-pot-movable water quenching system utilizing excess heat of molten slag based on water quenching steam method |
| CN102329900A (en) * | 2011-09-30 | 2012-01-25 | 中国科学院过程工程研究所 | Liquid steel slag dry-process granulating device and sensible heat recovery method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53125990A (en) * | 1977-04-11 | 1978-11-02 | Mitsui Eng & Shipbuild Co Ltd | Slag treatment apparatus |
| KR101044909B1 (en) * | 2009-02-23 | 2011-06-29 | (주)세와비전 | Molten slag sensible heat recovery equipment in blast furnace |
-
2012
- 2012-03-28 CN CN201210084807.9A patent/CN102618674B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4548162A (en) * | 1984-10-22 | 1985-10-22 | Combustion Engineering, Inc. | Slagging heat recovery unit with potassium seed recovery |
| CN1888082A (en) * | 2006-07-20 | 2007-01-03 | 重庆大学 | Liquid blast furnace slag heat recovering apparatus and method |
| CN101550460A (en) * | 2009-05-08 | 2009-10-07 | 清华大学 | Method and apparatus of blast furnace slag quench and heat recovery |
| CN102304594A (en) * | 2011-09-29 | 2012-01-04 | 魏明 | Slag-pot-movable water quenching system utilizing excess heat of molten slag based on water quenching steam method |
| CN102329900A (en) * | 2011-09-30 | 2012-01-25 | 中国科学院过程工程研究所 | Liquid steel slag dry-process granulating device and sensible heat recovery method |
Non-Patent Citations (1)
| Title |
|---|
| JP昭53-125990A 1978.11.02 |
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