CN109141046A - A kind of molten state high temperature substance physical sensible heat recovery system - Google Patents
A kind of molten state high temperature substance physical sensible heat recovery system Download PDFInfo
- Publication number
- CN109141046A CN109141046A CN201810979740.2A CN201810979740A CN109141046A CN 109141046 A CN109141046 A CN 109141046A CN 201810979740 A CN201810979740 A CN 201810979740A CN 109141046 A CN109141046 A CN 109141046A
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- Prior art keywords
- slag
- water
- heat recovery
- cooling
- sensible heat
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
-
- 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
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/04—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being hot slag, hot residues, or heated blocks, e.g. iron blocks
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28C—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA COME INTO DIRECT CONTACT WITHOUT CHEMICAL INTERACTION
- F28C3/00—Other direct-contact heat-exchange apparatus
- F28C3/10—Other direct-contact heat-exchange apparatus one heat-exchange medium at least being a fluent solid, e.g. a particulate material
- F28C3/12—Other direct-contact heat-exchange apparatus one heat-exchange medium at least being a fluent solid, e.g. a particulate material the heat-exchange medium being a particulate material and a gas, vapour, or liquid
- F28C3/18—Other direct-contact heat-exchange apparatus one heat-exchange medium at least being a fluent solid, e.g. a particulate material the heat-exchange medium being a particulate material and a gas, vapour, or liquid the particulate material being contained in rotating drums
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
- F27D2017/006—Systems for reclaiming waste heat using a boiler
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Sustainable Energy (AREA)
- Sustainable Development (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Manufacture Of Iron (AREA)
- Furnace Details (AREA)
Abstract
A kind of entitled molten state high temperature substance physical sensible heat recovery system of the present invention, belongs to engineering thermophysics field.Solve the problems, such as the waste heat recycling and resource utilization of the high-temperature metallurgical slag that steel plant and coloured smelting factory generate.It is granulated using revolving cup, slag particle enters the water mist space acquisition cooling velocity more order of magnitude greater than flying in air after casting revolving cup aside.Slag particle after cooling enters powder heat exchanger under the effect of gravity, and cooling water in powder heat exchanger, which absorbs, becomes hot water with pressure after heat, hot water with pressure enter flash vessel be changed into (low) pressure steam, drive steam turbine and electrical power generators.Slag particle after cooling obtains 95% or more glass phase, and waste heat recovery rate is close to 83% (in addition 17% is the expendable heat of transformation).This patent ensure that slag cement quality while recycling heat.
Description
Technical field
The present invention relates to high-temperature molten-state substance physical sensible heat recovery technology, recycling molten state to greatest extent both can guarantee
The physical sensible heat of substance also ensures the resource recycling of molten state substance when needing.It can be used for metallurgical slag (vessel slag, height
Clinker also includes the coloured slag such as lead zinc-copper tin), the physical sensible heat of molten state calcium carbide and other chemical process high-temperature molten-state substances
Recycling.
Background technique
China's steel industry total energy consumption accounts for the 16.3% of national total energy consumption, the clinker of iron and steel enterprise (including blast furnace and converter
Slag) sensible heat account for enterprise always use can 9%.According to State Statistics Bureau's " national economy and social development statistical report in 2016 " 2016
Year, Chinese energy total amount consumed was 43.6 hundred million tons of standard coals, and 16.3% is 7.1 hundred million tons of standard coals, then the heat that steel slag is taken away is big
About 0.64 hundred million tons of standard coals.If standard coal price reaches 511.7 hundred million yuan by 800 yuan of calculating, national steel slag heat loss.It can
See, the huge degree of steel slag heat loss.
Horizontal (such as prince wife Cao pasture blast furnace), the slag iron ratio~280kg/t according to domestic advanced smelting.I.e. every 1 ton of iron of production produces
Raw 280Kg blast furnace slag.If 1500 DEG C of steel slag temperature, 1650J/kg DEG C of specific heat calculating, iron per ton generates 693000kJ/t waste heat,
It is equivalent to 23.64kg standard coal, is worth 18.92 yuan.I.e. every production 1t iron loss is worth 18.92 yuan of waste heat.If by higher
Slag iron ratio 350kg/t calculate, iron per ton generates 866250kJ/t waste heat, is equivalent to 29.55kg standard coal, value 23.64
Member.
Currently, metallurgical slag physical sensible heat is almost without effective recovery technology.
(2011), M.Barati etc. such as (2008) such as G.BISIO (1997), Dirk Durinck, Zhang Huaiwei
(2011), Hui Zhang etc. (2013) et al. has successively delivered the Review literature of steel slag Waste Heat Recovery technology.These comprehensive documents
With some Research Literatures it is recognised that since steel slag Waste Heat Recovery research, Merotec technology, NKK wind quenching have been had already appeared
Technology, NKK rotary drum technology, BSC revolving cup technology, Ural technology ....The granulation process of these technologies be broadly divided into wind quenching be granulated,
Centrifugal granulating and mechanical pelleting three categories.Waste heat recovery process is mainly waste heat boiler and grain bed heat exchanger, including fluidized bed
Heat exchanger and moving bed heat exchanger.So far, there are not technical strategies.
In terms of granulating technique, wind quenching granulating technique energy consumption is relatively high, and Japan once reported the wind quenching energy consumption of 2000kW or more.
And the energy consumption of revolving cup granulating technique is in tens kilowatts of levels.In terms of Waste Heat Recovery technology, particle bed technique has some natural defects.
Although fluidized bed heat transfer coefficient is high, energy consumption is also high.Although low energy consumption for moving bed, heat transfer coefficient is also low.
It is to need to guarantee metallurgy while recycling its waste heat that molten state metallurgical slag physical sensible heat, which recycles most important problem,
Raw material of the solid impurity particle as slag cement, the relatively high slag cement of production label.
Although countries in the world have carried out many researchs, some of them enter the commerical test stage.But techno-economic question
Molten state metallurgical slag heat recovery and utilization is annoying always with glass phase conversion ratio.Technological Economy angle sees, no matter the valence of heat
Value has much, is a kind of industrial waste heat after all, therefore, if Waste Heat Recovery operating cost is higher, causes the investment payback time too long,
Then technology development is restricted by economic condition.On the other hand, glass phase conversion ratio is the physical condition for guaranteeing slag cement quality,
The operating condition for guaranteeing glass phase conversion ratio is that steel slag obtains enough cooling velocities.This just makes the lower skill of some cooling velocities
Art (such as wind quenching) is restricted, and otherwise will sacrifice slag cement quality.
Summary of the invention
The present invention devises temperature-resistant principle when undergoing phase transition by water and forms low temperature space, enables metallurgical solid impurity particle low
It is quickly cooled down in warm space, forms the glass phase substance of enough ratios, come acquisition while guaranteeing to recycle metallurgical slag waste heat
Good slag cement raw material.
Fig. 1 provides the overall structure of molten state high temperature substance physical sensible heat recovery system.
Whole system is made of following two large divisions.Prilling section and Waste Heat Recovery part.
Low temperature space 8 is collectively formed using water spray, spray system and water cooling piping in the present invention.Shui Jingshui in water tank 13
Low temperature space 8 is sprayed into through water pipeline 10 after 12 boosting of pump, sees Figure of description 1.
Water pipeline 10 includes spray nozzle 23 and spray spout 24 and regulating valve 25, temperature-resistant when becoming by water phase
Principle guarantee low temperature space 8 be in cooling water temperature, see Figure of description 2.
Low temperature space 8 is made of roof tube 30, preceding wall coil 29, rear wall coil 31 and lower tube 28 and side wall pipe.Roof tube 30
Using allowing Manifold technology to install melt substance introduction tube 32, Figure of description 3 is seen.
Prilling granulator is that the revolving cup 9 that motor 27 drives is constituted, and for the long-term work of protection revolving cup at high temperature, is provided with and turns
The lower tube 28 that cup cooling water pipe 26, rotor axis and revolving cup cooling tube pass through water cooling space 8 enters low temperature space, sees that specification is attached
Fig. 4.
The melt substance that melt substance introduction tube 32 is fallen drops into revolving cup 9 by gravity, by gravity through slag after granulation
Pipeline 15 enters slag particle waste heat recovery plant 17 and recycles heat, then transports by slag runner 19.
First core technology of this patent is low temperature space 8.Low temperature space forms enclosure space by water cooling piping, at it
Middle water spray and mist form one by the constant caused low temperature space of water phase temperature, leave the slag particle of revolving cup at least and by weight
Droplets impact 1 time of power landing is surrounded reaching the previous water mist directly diffused of water cooling piping, thus to obtain enough cooling speed
Degree.
Second core technology of this patent is to recycle slag particle using rotary type heat exchanger-slag particle waste heat recovery plant 17 to take
The heat of band produces high parameter hot water.
The third core technology of this patent is to utilize high-temperature-hot-water electricity generation system.High parameter hot water becomes same through the dilatation phase
Parameter saturated vapor drives saturated steam turbine power generation.
Figure of description 5 is the piping system of this patent.It is 2 strands that cooling water pipe 11, which divides, one approaching side wall coil system, secondly
Into roof tube and furnace bottom piping.Cooling water is sent into side wall pipe 33 by 11 approaching side wall coil header 36 of cooling water pipe, through on side wall
Header 37 is aggregated into outlet pipe 39；By rear wall, cooling water is sent into roof tube 30, preceding to cooling water pipe 11 by header 35 and 38 up and down
Wall coil 29, rear wall coil 31 and lower tube 28, through 6 carrying-off of fairlead.
Figure of description 6 is the detail drawing of ceiling piping 30.Roof tube 30 includes air inlet-outlet-housing 38, straight tube 41, water jet
With atomizing nozzle allow pipe 40, melt substance import allow pipe 32 constitute.
Figure of description 7 is 29 detail drawing of front wall piping, including upper and lower header 38, water vapour outlet 42, straight tube 43, allows pipe
44。
Figure of description 8 is rear 31 detail drawing of wall coil system.Including upper header 38 and lower collecting box 35 and straight tube 45.
Figure of description 9 is 33 detail drawing of side wall piping.Including water inlet pipe 11, outlet pipe 39, straight tube 46, upper header 37 and under
Header 36.
Figure of description 10 is the detail drawing of bottom piping 28.Including left and right header (structure is identical) 35, preceding wall coil 29,
Straight tube 48, rear wall coil 31, slag mouth 51, revolving cup cooling water pipe 49 and rotor axis 50.
The function of slag particle waste heat recovery plant 17 is rotatable hot-water boiler, actually a high-temperature powder heat exchange
Device.The cooling water for recycling slag particle waste heat is introduced by being directed to rotary joint 18 to the warm water fairlead 6 of the cooling piping of low temperature space 8
Hot-water boiler 17 is rotated, becomes the high-temperature-hot-water with certain pressure after cooling water heat absorption, it can be direct to heat user through hot-water line 4
Hot-water supply, or hot water is introduced into hot water flash vessel 20 with pressure, hot water with pressure formed in hot water flash vessel same parameter (middle pressure or
Low pressure) saturated vapor, drive steam turbine 21 and generator 22 to generate electricity.
Specific embodiment
Embodiment:
2 × 2.3t/min=2 of metallurgical slag flow × 138t/h takes metallurgical slag bulk specific weight 1.250t/m3, then metallurgical slag
Volume flow is 2 × 138/1.25=2 × 110.4m3/h.Since metallurgical slag is intermittently operated, the practical metallurgical slag of granulating system
Flow is taken as 110.4m3/h.1550 DEG C of metallurgical slag temperature.According to calculation of thermodynamics, steel slag completes steel slag before 1200 DEG C
Inversion of phases is converted into solid glass phase by molten state, to consume the heat of transformation for being equivalent to steel slag heat 17% at this time.I.e.
Heat between 1550 DEG C to 1100 DEG C is consumed in steel slag phase transformation in low temperature space and water phase becomes.
16~20t/h of atomized water amount of water sprayed.
The industrial return water that cooling water is 50 DEG C, flow 50t/h produce 120 DEG C of high-temperature-hot-waters of 2.0MPa.
It is granulated experimental result according to revolving cup, the droplet flight speed after being detached from revolving cup is made even substantially between 4~5m/s
The time that equal speed 4.5m/s can obtain flight 2m is 0.444s, in~50 DEG C of water mist space, the cooling velocity of slag particle
It is far longer than the critical cooling rate of 100 DEG C/s, highest cooling velocity can reach the 1000 DEG C/s order of magnitude.
Critical size
Tilt revolving cup critical size are as follows: revolving cup effective radius 55mm, rotational speed of rotor 1000rpm.
Low temperature space critical size are as follows: the projected area perpendicular to revolving cup is 4m × 4m；Top is equipped with 4 water atomization sprays
Mouth, a steel slag import and a water vapour outlet.
High-temperature powder heat exchanger critical size are as follows: overall length 6m, diameter 1.8m.
Important feature and function:
Revolving boiler (high-temperature powder heat exchanger): high-temperature powder heat exchanger be one rotation water cold drum, inside be
The mechanism of some powder movements and diabatic process being made of water cooling tube, extracts the heat that slag particle carries to greatest extent, will be cold
But water temperature is increased to the temperature of user's requirement.
Water cooling space: water cooling space is surrounded by water cooling piping, vertical with rotor axis.W is made in water cooling space floor tube
Type structure, design facilitates slag particle in this way can trickle to slag dropping tube naturally under the effect of gravity.
Hot water flash vessel: the high-temperature-hot-water of 2.0MPa is changed into saturated vapor after entering flash vessel.
Enclosed structure: the operation platform and steelframe and clay brick that enclosed structure is constructed by armored concrete are constituted, wherein steel
Frame is 10# channel steel welding production, is responsible for protection clay brick structure and undertakes all Suspension weight.Operation platform is apart from ground
Height difference 6m.
Steam fairlead: it is provided with the circular open that 2 diameters are 250mm on the upside of water cooling space, the steam of atomized water is drawn
It walks.
Detailed description of the invention
Fig. 1 provides the overall structure of molten state high temperature substance physical sensible heat recovery system.
Fig. 2 is low temperature space water spray and spray pipe system.
Fig. 3 is low temperature space cooling water pipe system
Fig. 4 is revolving cup granulating system
Fig. 5 is to be granulated low temperature space piping side view
Fig. 6 is ceiling piping detail drawing
Fig. 7 is front wall piping detail drawing
Fig. 8 is rear wall coil system detail drawing
Fig. 9 is side wall piping detail drawing
Figure 10 is bottom piping detail drawing.
Claims (6)
1. a kind of molten state high temperature substance physical sensible heat recovery system, it is characterised in that high-temperature molten slag by slag introduction tube 32 according to
In gravity trickling to revolving cup 9, revolving cup 9 is driven by a motor rotation, casts molten steel slag aside revolving cup by centrifugal force, casts revolving cup aside
Slag particle afterwards enters water cooling space 8, and into the water mist sprayed by water atomizing nozzle, slag particle after cooling is by gravity along furnace
Bottom tube is 28 tricklings, reaches slag dropping tube 15, and the slag particle come out from slag dropping tube 15, which enters in high-temperature powder heat exchanger 17, discharges heat
Afterwards, it is transported by the slag-conveying device in slag runner 19.
2. molten state high temperature substance physical sensible heat recovery system according to claim 1, it is characterised in that changed using powder
Hot device 17 absorbs the physical sensible heat that slag particle carries, and provides a user hot water by pipe 4.
3. molten state high temperature substance physical sensible heat recovery system according to claim 1, it is characterised in that water cooling space 8
Water mist enters condenser 20 through steam fairlead 7 and recycles the heat of transformation that spray vaporization absorbs.
4. molten state high temperature substance physical sensible heat recovery system according to claim 1, it is characterised in that utilize nozzle 23
Quasi- constant temperature space is formed with 24 water sprays, the slag particle for producing revolving cup obtains enough cooling temperature and pressure and highest cooling speed
Degree guarantees glass phase conversion ratio.
5. molten state high temperature substance physical sensible heat recovery system according to claim 1, it is characterised in that generation it is with pressure
Hot water can be introduced into the steam that flash vessel is changed into relevant parameter, drive steam turbine and electrical power generators.
6. physical sensible heat recovery system according to claim 1, it is characterised in that construct closed water using water cooling piping
Cold space.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810979740.2A CN109141046A (en) | 2018-08-27 | 2018-08-27 | A kind of molten state high temperature substance physical sensible heat recovery system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810979740.2A CN109141046A (en) | 2018-08-27 | 2018-08-27 | A kind of molten state high temperature substance physical sensible heat recovery system |
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| CN109141046A true CN109141046A (en) | 2019-01-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109943674A (en) * | 2019-04-18 | 2019-06-28 | 光阳工程技术有限公司 | A kind of reproducibility steel slag is cold to be solved and waste heat gradient recovery system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5731070B2 (en) * | 1976-06-05 | 1982-07-02 | ||
| CN101721946A (en) * | 2008-10-21 | 2010-06-09 | 中国石油大学(北京) | Novel spray granulation and separation tower with centrifugal separation function |
| CN102268495A (en) * | 2011-07-20 | 2011-12-07 | 北京中冶设备研究设计总院有限公司 | Process technology and equipment for granulating blast-furnace slag and utilizing waste heat |
| CN103695581A (en) * | 2013-12-16 | 2014-04-02 | 北京中冶设备研究设计总院有限公司 | Process and equipment for slag granulation and sensible heat recovery of blast furnace |
| JP2015231923A (en) * | 2014-06-09 | 2015-12-24 | 日鉄住金環境株式会社 | Manufacturing method of granulated blast furnace slag and granulated blast furnace slag obtained by the same |
| CN107058653A (en) * | 2017-03-01 | 2017-08-18 | 石家庄工大化工设备有限公司 | High temperature furnace slag recoverying and utilizing method |
-
2018
- 2018-08-27 CN CN201810979740.2A patent/CN109141046A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5731070B2 (en) * | 1976-06-05 | 1982-07-02 | ||
| CN101721946A (en) * | 2008-10-21 | 2010-06-09 | 中国石油大学(北京) | Novel spray granulation and separation tower with centrifugal separation function |
| CN102268495A (en) * | 2011-07-20 | 2011-12-07 | 北京中冶设备研究设计总院有限公司 | Process technology and equipment for granulating blast-furnace slag and utilizing waste heat |
| CN103695581A (en) * | 2013-12-16 | 2014-04-02 | 北京中冶设备研究设计总院有限公司 | Process and equipment for slag granulation and sensible heat recovery of blast furnace |
| JP2015231923A (en) * | 2014-06-09 | 2015-12-24 | 日鉄住金環境株式会社 | Manufacturing method of granulated blast furnace slag and granulated blast furnace slag obtained by the same |
| CN107058653A (en) * | 2017-03-01 | 2017-08-18 | 石家庄工大化工设备有限公司 | High temperature furnace slag recoverying and utilizing method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109943674A (en) * | 2019-04-18 | 2019-06-28 | 光阳工程技术有限公司 | A kind of reproducibility steel slag is cold to be solved and waste heat gradient recovery system |
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Application publication date: 20190104 |