CN106595327A - Linkage type sintered ore waste heat recovery and comprehensive utilization process and system - Google Patents
Linkage type sintered ore waste heat recovery and comprehensive utilization process and system Download PDFInfo
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- CN106595327A CN106595327A CN201710014244.9A CN201710014244A CN106595327A CN 106595327 A CN106595327 A CN 106595327A CN 201710014244 A CN201710014244 A CN 201710014244A CN 106595327 A CN106595327 A CN 106595327A
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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
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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
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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
- Y02P10/25—Process efficiency
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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
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention relates to a linkage type sintered ore waste heat recovery and comprehensive utilization process and system. Hot sintered ore enters an upright cooling device to be cooled through heat exchange with cooling air; hot air after heat exchange enters a waste heat recovery device and medium-pressure steam and low-pressure steam are generated at the same time; the medium-pressure steam is used for directly dragging a main sintering suction fan, and the low-pressure steam serves as thermal source steam for a desulfuration waste liquid crystallization device after the flue gas desulfuration process of a sintering machine and also serves as steam for sintered ore layer surface spraying after ignition of the sintering machine; and hot waste gas after passing through the waste heat recovery device is subjected to purification treatment, guided into a machine head hot air cover of the sintering machine and a machine tail hot air cover of the sintering machine to serve as the thermal source for hot air sintering and guided into an ignition furnace of the sintering machine to serve as combustion-supporting hot air. By means of the linkage type sintered ore waste heat recovery and comprehensive utilization process and system, maximization of sintered ore waste heat utilization efficiency is achieved, and the purposes of saving energy, reducing consumption and reducing production cost are finally achieved; and the linkage type sintered ore waste heat recovery and comprehensive utilization process is scientific, reasonable, feasible and reliable in operation, existing sintering processes are fully integrated, and technical improvement is low in investment and becomes effective rapidly.
Description
Technical field
The present invention relates to metal smelt and heat recovery technical field, more particularly to a kind of coordinated type sintering deposit waste heat
Reclaim comprehensive utilization process and system.
Background technology
The energy consumption of steel enterprise sintering operation accounts for producing the 15% of total energy consumption, is only second to Iron-smelting.Sintering process is produced
Raw residual heat resources include sintering mine sensible heat and sintering obvious heat of smoke, the cooling that they are discharged respectively by sinter cooler top
Entrained by the sintering flue gas that waste gas and sintering machine bottom are extracted out.The residual heat resources amount of the big-and-middle-sized iron and steel enterprise 1t sintering deposits of China is about
For 0.94GJ, the 70.87% of sintering waste heat total resources is accounted for, account for the 11.14% of whole iron and steel enterprise's residual heat resources total amount, but it is real
The sintering deposit residual heat resources response rate on border is very low, and only 29.79%.
As shown in figure 1, being a kind of sintering waste heat recovery system being most frequently with present, heat sinter enters cold after sintering machine
But the cooling wind that device (straight line cooler or circular cooler) 18 is blasted with chiller blower fan 20 is exchanged heat, after heat exchange
Hot blast is entered to be exchanged heat with water in waste-heat recovery device 7 and generates superheated steam, and superheated steam is used to generate electricity, and electricity is incorporated to electricity
Net；The flue gas of the bottom of sintering machine 4 is extracted out by main exhauster of sintering 11, de- by cleaner unit 12 and flue-gas desulfurizing device of sintering device 14
Discharged by chimney 13 after sulfur purification.Can reclaim a part of sintering waste heat although with said system, but its be not carried out it is remaining
The maximization of recuperation of heat.Because using straight line cooler or circular cooler, the bed of material on chiller is excessively thin, sintering is being realized
The waste heat quality low (hot blast temperature is only 200～300 DEG C) that ore deposit is reclaimed while cooling.And chiller and cooling wind
Import and export adopts Dynamic link library, leaks out serious, causes thermal loss big；Therefore, current sintering waste heat recycles efficiency and needs
Improve.
Efficiency is recycled in order to improve sintering waste heat, the vertical chiller of sintering deposit is occurred in that in recent years.Such as application number
Disclosed in 201510445662.4 Chinese patent a kind of " vertical type cooling tower and sintering waste heat utilization system "；Application number
Disclosed in 201310419503.8 Chinese patent " a kind of vertical cooling kiln "；The China of Application No. 201410280340.4
" for the vertical helical distributary cooling heat exchange device and its method of sintering waste heat generating system " a kind of disclosed in patent；Application number
A kind of disclosed in 200910187381.8 Chinese patent " the perpendicular pot type retracting device of waste heat resources in sintering process and utilization side
Method " etc., above-mentioned patented technology reclaims generation afterheat steam and is studied for sintering mine sensible heat, lays particular emphasis on waste-heat recovery device
The research of the aspects such as structure, cloth wind mode, it is possible to increase waste heat recovery quality (hot blast temperature is higher than 450 DEG C), but waste heat is steamed
The occupation mode of vapour is fairly simple, and substantially using directly carrying out by the way of cogeneration, the linking with sintering process is few.
It is well known that the effective way for improving utilization rate of waste heat is to reduce conversion times, existing sintering mine sensible heat is reclaimed
Generally steam is produced using waste heat recovery, recycle vapourss to be generated electricity, applied after power transmission and electrical power conversion and given
End user, this kind of UTILIZATION OF VESIDUAL HEAT IN need to be changed by many subthermal energies, reduce utilization rate of waste heat.It can be seen that, more than vertical sintering deposit
Still there is room for promotion in heat reclamation device utilization ratio.
The content of the invention
The invention provides a kind of coordinated type sintering deposit waste heat recovery comprehensive utilization process and system, are filled using vertical cooling
Receipts sintering deposit waste heat is put back into, again Jing waste-heat recovery devices generate middle pressure steam and low-pressure steam to 450～500 DEG C of hot blast；Steam
Using using directly utilizing, nearby using, rationally utilize and the principle of classified utilization reaches the maximization of utilization ratio, and finally
Realize purpose that is energy-saving, reducing production cost；The craft science is reasonable, practical, reliable, by existing sintering
Technique is fully integrated, technological improvement small investment, instant effect.
In order to achieve the above object, the present invention employs the following technical solutions realization：
A kind of coordinated type sintering deposit waste heat recovery comprehensive utilization process, heat sinter is entered in vertical chiller and cooling
Wind heat exchange cooling, the hot blast after heat exchange is entered in waste-heat recovery device and generates middle pressure steam and low-pressure steam simultaneously, wherein middle pressure
Steam is used to directly drag main exhauster of sintering, and low-pressure steam is used as desulfurization waste liquor crystallization apparatus after flue gas of sintering machine technique
Heat source stream and as sintering deposit layer surface injection steam after ignition of sintering process；Hot waste gas Jing after waste-heat recovery device
Cause after purified process in sintering device handpiece air bells cap, tail air bells cap as the thermal source and introducing sintering machine point of hot gas sintering
As combustion-supporting hot blast in stove.
A kind of coordinated type sintering deposit waste heat recovery comprehensive utilization process, specifically includes following steps：
1) sinter mixture Jing distributing devices cloth expected in sintering pallet, using igniting furnace igniting, while starting sintering master
Air exhauster carries out down draft sintering, sprays steam to sintering deposit layer surface within 5～10 minutes after igniting, and the pressure of steam is 0.2～
0.5MPa, temperature is 200～300 DEG C；Sinter mixture moves forward with sintering machine operation, through wet layer, drying layer, preliminary heating zone, burning
Heat sinter is formed after the sintering transformation of knot layer and sintering ore bed；Sintering flue gas under sintering machine successively lead by removing dust device, sintering
Air exhauster, flue gas desulfurization device carry out purified treatment, it is up to standard after Jing smoke stack emissions；
2) more than 700 DEG C of heat sinter is carried out after crushing in vertical chiller in sintering machine tail with cooling wind
Heat exchange, is cooled to outside less than 150 DEG C of sintering deposit and arranges；450～500 DEG C of hot blast enters waste-heat recovery device after heat exchange, together
Water carries out producing steam after heat exchange；Waste-heat recovery device is provided with middle pressure drum and low pressure drum；The pressure of middle pressure drum output
Interior energy is converted into mechanical energy by the middle pressure steam of >=0.6MPa into steam turbine, drives synchronous motor to turn by speed change clutch
Move and drag main exhauster of sintering operating；Dragged from electrical network power taking by synchronous motor when sintering starts and when quantity of steam is not enough
Main exhauster of sintering works, and unnecessary electricity is connected to the grid when quantity of steam is remaining；
3) low-pressure steam point of the pressure ＜ 0.6MPa of waste-heat recovery device low pressure drum output is all the way or two-way is exported, its
In be all the way in the desulfurization waste liquor crystallization apparatus that low-pressure steam is transported to after flue gas of sintering machine technique, desulfurization waste liquor crystallization
Device realizes that desulfurization waste liquor is crystallized using flash concentration method, and its heater is using steam as thermal source；Another road is to steam low pressure
Vapour is transported in multiple rows of steam jet of pallet top arrangement, and low-pressure steam is sprayed by multiple spray orifices to sintering deposit layer surface
Penetrate and realize intensified-sintered；After to sintering deposit top layer injection steam, steam enters quickly pan feeding under the draft of main exhauster of sintering
Layer, because top layer sintering deposit temperature now is typically not less than 100 DEG C, steam will not be produced after contacting with sintering deposit and condense into liquid
State water, 200～300 DEG C of steam can play insulation effect to sintering deposit top layer, reduce the rate of cooling of sintering deposit；Steam is descending
Through sintering deposit band, quickly into combustion zone, combustion zone temperature is up to more than 1300 DEG C, and steam resolves into quickly H2With O2, and with
Fuel C reaction generates CO or CO2；H2Reduction reaction is carried out to iron ore as strong reductant with CO, FeO even metallic irons are generated,
The FeO contents of energy acceleration of sintering ore deposit increase, and can save compound with charcoal；On the other hand, the O that steam is resolved into2Accelerate combustion
Material combustion velocity is sintering velocity, and deep-bed sintering resistance can be overcome to increase the defect of hypoventilation；Combustion reaction
Generate CO2Into waste gas, fuel availability is improve；The high-temperature steam generated after reduction of iron ore reaction, sequentially enters the bed of material
Preheating zone, dry zone, compound band preheated, can eliminate excessive moistening layer especially by the temperature for improving compound band
Affect, improve the quality of sintering deposit；
4) the hot waste gas Jing of more than 150 DEG C Jing after waste-heat recovery device heat exchange of the hot blast that vertical chiller is produced discharges fume
Blower fan is drawn, and sintering device handpiece air bells cap, tail air bells cap and sintering machine point are respectively outputted to as thermal source after purified process
In stove；Hot waste gas is introduced in sintering device handpiece air bells cap and tail air bells cap, for improving the sintering deposit bed of material on sintering machine
Temperature realizes hot gas sintering, and hot gas sintering improves sintering deposit bed of material top sintering temperature, amount of liquid phase increases, while liquid phase is glutinous
Degree is reduced, and is conducive to mineral sufficient crystallising, amount of glassy phase to reduce, strong so as to improve the overall yield rate of sintering and sintering deposit
Degree；Hot waste gas is introduced in ignition furnace of sintering machine as combustion-supporting hot blast, it is possible to increase ignition of sintering process temperature, improve sintering condition
And stabilized sinter temperature.
It is for realizing a kind of coordinated type sintering deposit waste heat recovery utilization system of the technique including sintering machine, vertical
Formula chiller, waste-heat recovery device, steam turbine, synchronous motor, main exhauster of sintering, cleaner unit, flue gas of sintering machine
Device, desulfurization waste liquor crystallization apparatus and chimney；The sintering machine afterbody sets up formula chiller, sets at the top of vertical chiller
Heat sinter entrance, bottom sets cold sinter outlet, and bottom sets cooling wind air inlet and is connected with cooling blower, and top sets hot blast and goes out
Mouth connection waste-heat recovery device；
Middle pressure drum and low pressure drum are set in waste-heat recovery device, middle pressure drum connects steamer by Medium Pressure Steam Pipeline
Machine, the power end of steam turbine drives synchronous motor, synchronous motor to drag main exhauster of sintering by speed change clutch；Sintering
The main smoking road of motor spindle connects the air inlet of main exhauster of sintering, the air outlet connection sintering of main exhauster of sintering by cleaner unit
Machine flue gas desulfurization device；The neat stress outlet connection chimney of flue-gas desulfurizing device of sintering device, desulfurization waste liquor outlet connection desulfurization is given up
The desulfurization waste liquor entrance of liquid crystallization apparatus；
Low pressure drum in waste-heat recovery device is divided into two steam branch roads, a steam branch road by low-pressure steam pipeline
Connection desulfurization waste liquor crystallization apparatus heater；Steam jet above another steam branch road connection pallet；
The hot waste gas outlet of waste-heat recovery device connects hot waste gas pipeline by smoke exhaust fan, and hot waste gas pipeline is sequentially connected
The combustion-supporting hot-wind inlet of lighter in the tail air bells cap of sintering machine, head air bells cap and ignition furnace.
The waste-heat recovery device is waste heat boiler.
The flue-gas desulfurizing device of sintering device is wet-type magnesia desulfurizer；The desulfurization waste liquor crystallization apparatus are evaporation
Crystallizer.
Compared with prior art, the invention has the beneficial effects as follows：
1) fully integrate with existing sintering process, the steam produced using hot sintering deposit waste heat recovery is directly dragged master and taken out
Blower fan, while the heat smoke after waste heat recovery is used for sintering feed post-heating and improves sintering ignition temperature；Both fully reclaimed
Sintering deposit waste heat, realizes the direct utilization of the energy again, reduces heat energy conversion times, substantially increases sintering waste heat and reclaims effect
Rate；
2) with reference to the practical operation situation of sintering process, abundant, reasonable, science classification is carried out to the steam of waste heat recovery
Utilize, while waste heat recovery efficiency is improved, it is determined that steam utilization optimizing process definitely；
3) efficiently, economically using the high temperature heat of hot sintering deposit, mesh that is energy-saving, reducing production cost is reached
, the technique is practical in actual production, reliable, has dramatically practiced advocating for national " energy-saving and emission-reduction "
View.
Description of the drawings
Fig. 1 is sintering deposit UTILIZATION OF VESIDUAL HEAT IN common process process schematic.
Fig. 2 is coordinated type sintering deposit waste heat recovery comprehensive utilization process process schematic of the present invention.
In figure：1. the vertical cooling of 2. ignition furnace of distributing device, 3. head air bells cap, 4. sintering machine, 5. tail air bells cap 6.
Main 11. main exhauster of sintering of smoking road 12. dedusting of 7. waste-heat recovery device of device, 8. smoke exhaust fan, 9. cooling blower 10.
Device 13. chimney, 14. flue-gas desulfurizing device of sintering device, 15. synchronous motor, 16. speed change clutch, 17. steam turbines 18. are cold
But the desulfurization of 22. low pressure drum of drum 23. is pressed in the chiller blower fan 21. of device (cold with cold/ring) 19. circulating fan 20.
Waste liquid crystallization device
Specific embodiment
The specific embodiment of the present invention is described further below in conjunction with the accompanying drawings：
As shown in Fig. 2 a kind of coordinated type sintering deposit waste heat recovery comprehensive utilization process of the present invention, heat sinter entrance
With cooling wind heat exchange cooling in vertical chiller 6, the hot blast after heat exchange enters pressure generate in waste-heat recovery device 7 simultaneously in and steams
Vapour and low-pressure steam, wherein middle pressure steam are used to directly drag main exhauster of sintering 11, and low-pressure steam is de- as sintering device flue gas
After sulfur technique the heat source stream of desulfurization waste liquor crystallization apparatus 23 and as sintering machine 4 light a fire after the injection of sintering deposit layer surface steaming
Vapour；Cause after the purified process of hot waste gas Jing after waste-heat recovery device 7 in sintering device handpiece air bells cap 3, tail air bells cap 5 and make
As combustion-supporting hot blast in thermal source and introducing ignition furnace of sintering machine 2 for hot gas sintering.
As shown in Fig. 2 a kind of coordinated type sintering deposit waste heat recovery comprehensive utilization process of the present invention, specifically includes as follows
Step：
1) cloth of sinter mixture Jing distributing devices 1 expected in the chassis of sintering machine 4, is lighted a fire using ignition furnace 2, while starting sintering
Main exhauster 11 carries out down draft sintering, sprays steam to sintering deposit layer surface within 5～10 minutes after igniting, and the pressure of steam is 0.2
～0.5MPa, temperature is 200～300 DEG C；Sinter mixture with sintering machine 4 operation move forward, through wet layer, drying layer, preliminary heating zone,
Heat sinter is formed after the sintering transformation of sinter layer and sintering ore bed；Sintering flue gas under sintering machine 4 successively removing dust device 12, burn
Knot main exhauster 11, flue gas desulfurization device 14 carry out purified treatment, it is up to standard after Jing chimneys 13 discharge；
2) more than 700 DEG C of heat sinter enters after crushing in vertical chiller 6 in sintering machine tail with cooling wind
Row heat exchange, is cooled to outside less than 150 DEG C of sintering deposit and arranges；450～500 DEG C of hot blast enters waste-heat recovery device 7 after heat exchange,
Carry out producing steam after heat exchange with water；Waste-heat recovery device 7 is provided with middle pressure drum 21 and low pressure drum 22；Middle pressure drum 21 is defeated
Interior energy is converted into mechanical energy by the middle pressure steam of the pressure >=0.6MPa for going out into steam turbine 17, is driven by speed change clutch 16
Synchronous motor 15 is rotated and drags main exhauster of sintering 11 and operates；Pass through synchronous electronic when sintering starts and when quantity of steam is not enough
Machine 15 drags main exhauster of sintering 11 and works from electrical network power taking, and unnecessary electricity is connected to the grid when quantity of steam is remaining；
3) low-pressure steam point of the pressure ＜ 0.6MPa of the output of waste-heat recovery device low pressure drum 22 is all the way or two-way is exported,
In being wherein all the way the desulfurization waste liquor crystallization apparatus 23 that low-pressure steam is transported to after flue gas of sintering machine technique, desulfurization waste liquor
Crystallization apparatus 23 realize that desulfurization waste liquor is crystallized using flash concentration method, and its heater is using steam as thermal source；Another road be by
Low-pressure steam is transported in multiple rows of steam jet of pallet top arrangement, and low-pressure steam is by multiple spray orifices to sintering ore bed
Surface injection is realized intensified-sintered；To sintering deposit top layer injection steam after, steam under the draft of main exhauster of sintering 11 very
F.F. enters the bed of material, and because top layer sintering deposit temperature now is typically not less than 100 DEG C, steam will not be produced after contacting with sintering deposit
Aqueous water is condensed into, 200～300 DEG C of steam can play insulation effect to sintering deposit top layer, reduce the rate of cooling of sintering deposit；
Steam is descending through sintering deposit band, and quickly into combustion zone, combustion zone temperature is up to more than 1300 DEG C, and steam resolves into quickly H2
With O2, and generate CO or CO with fuel C reaction2；H2Reduction reaction is carried out to iron ore as strong reductant with CO, FeO is generated very
To metallic iron, the FeO contents of energy acceleration of sintering ore deposit increase, and can save compound with charcoal；On the other hand, the O that steam is resolved into2
Fuel combustion response speed i.e. sintering velocity is accelerated, deep-bed sintering resistance can be overcome to increase the defect of hypoventilation；
Combustion reaction generates CO2Into waste gas, fuel availability is improve；The high-temperature steam generated after reduction of iron ore reaction, successively
Preheating zone, dry zone, compound band into the bed of material is preheated, and can be eliminated especially by the temperature for improving compound band
The impact of excessive moistening layer, improves the quality of sintering deposit；
4) vertical chiller 6 produce hot blast Jing waste-heat recovery device 7 heat exchange after more than 150 DEG C hot waste gas Jing arrange
Cigarette blower fan 8 is drawn, and sintering device handpiece air bells cap 3, tail air bells cap 5 and sintering are respectively outputted to as thermal source after purified process
In machine ignition furnace 2；Hot waste gas is introduced in sintering device handpiece air bells cap 3 and tail air bells cap 5, for improving the burning on sintering machine 4
Knot ore deposit material layer temperature realizes hot gas sintering, and hot gas sintering improves sintering deposit bed of material top sintering temperature, amount of liquid phase increases, together
When liquid phase viscosity reduce, be conducive to mineral sufficient crystallising, amount of glassy phase to reduce, so as to improve the overall yield rate of sintering and burning
Knot ore deposit intensity；Hot waste gas is introduced in ignition furnace of sintering machine 2 as combustion-supporting hot blast, it is possible to increase the firing temperature of sintering machine 4, improved
Sintering condition and stabilized sinter temperature.
It is for realizing a kind of coordinated type sintering deposit waste heat recovery utilization system of the technique including sintering machine 4, vertical
Formula chiller 6, waste-heat recovery device 7, steam turbine 17, synchronous motor 15, main exhauster of sintering 11, cleaner unit 12, sintering
Machine flue gas desulfurization device 14, desulfurization waste liquor crystallization apparatus 23 and chimney 13；The afterbody of the sintering machine 4 sets up formula chiller 6, stands
The top of formula chiller 6 sets heat sinter entrance, and bottom sets cold sinter outlet, and bottom sets cooling wind air inlet with cooling wind
Machine 9 is connected, and top sets hot-blast outlet connection waste-heat recovery device 7；
Middle pressure drum 21 and low pressure drum 22 are set in waste-heat recovery device 7, middle pressure drum 21 is connected by Medium Pressure Steam Pipeline
Steam turbine 17 is connect, the power end of steam turbine 17 drives synchronous motor 15, synchronous motor 15 to drag by speed change clutch 16
Main exhauster of sintering 11；The main smoking road 10 in the bottom of sintering machine 4 connects the air inlet of main exhauster of sintering 11 by cleaner unit 12, burns
The air outlet connection flue-gas desulfurizing device of sintering device 14 of knot main exhauster 11；The neat stress outlet of flue-gas desulfurizing device of sintering device 14
Connection chimney 13, the desulfurization waste liquor entrance of desulfurization waste liquor outlet connection desulfurization waste liquor crystallization apparatus 23；
Low pressure drum 22 in waste-heat recovery device 7 is divided into two steam branch roads, a steam by low-pressure steam pipeline
The heater of branch road connection desulfurization waste liquor crystallization apparatus 23；Steam jet above another steam branch road connection pallet；
The hot waste gas outlet of waste-heat recovery device 7 connects hot waste gas pipeline by smoke exhaust fan 8, and hot waste gas pipeline connects successively
Connect the combustion-supporting hot-wind inlet of lighter in tail air bells cap 5, head air bells cap 3 and the ignition furnace 2 of sintering machine.
The waste-heat recovery device 7 is waste heat boiler.
The flue-gas desulfurizing device of sintering device 14 is wet-type magnesia desulfurizer；The desulfurization waste liquor crystallization apparatus 23 are
Crystallizing evaporator.
As shown in Fig. 2 a kind of operation principle of coordinated type sintering deposit waste heat recovery comprehensive utilization process of the present invention is：
Cooling blower 9 blasts cooling wind into vertical chiller 6 and exchanges heat with heat sinter, and the hot blast obtained after heat exchange enters nearby remaining
Waste heat energy in hot blast is converted into steam by heat reclamation device 7, and middle pressure drum 21 presses saturated vapor to be used to drag burning in exporting
Knot main exhauster 11, can maintain main exhauster of sintering 11 normal by synchronous motor 15 when quantity of steam is not enough from electrical network power taking
Work, to electrical network reverse power generation when quantity of steam is more than needed；Low pressure drum 22 exports low-pressure saturated steam, and according to sintering machine 4 feelings are produced
To improve material temperature in the steam jet that condition is distributed to above desulfurization waste liquor crystallization apparatus 23 and pallet.
Present invention achieves heat sinter-cooling wind, vertical 6-waste-heat recovery device of chiller 7, middle pressure steam are dragged
Dynamic-low-pressure steam heating, various linked manners of the direct heat utilization of waste heat waste gas-process waste reuse, realize sintering deposit
Material stream and both sintering deposit residual heat resources energy streams collaboration coupling, so as to improve sintering deposit waste heat to a great extent
Utilization ratio：
First, hot sintering deposit is entered inside vertical chiller 6, and sintering deposit delays from top to bottom in vertical chiller 6
Slow mobile, the sintering deposit for being cooled to less than 150 DEG C is moved discharge；Cooling wind flows from bottom to top in vertical chiller 6,
Realize heat sinter-cooling wind linkage pattern；
2nd, wind is cooled down in vertical chiller 6 with more than 450 DEG C hot blasts are heated to form after sintering deposit heat exchange, hot blast is just
Closely enter waste-heat recovery device 7 and produce steam with water heat exchange, the heat smoke after waste-heat recovery device 7 is lowered the temperature returns sintering machine
To improve sinter bed temperature on 4；By the hot linking of vertical chiller 6 and waste-heat recovery device 7, tradition is changed
Hot blast reveals the phenomenon for causing serious heat loss in central cooler cooling procedure, realizes vertical 6-waste heat recovery of chiller dress
Put 7 linkage patterns；
3rd, the middle pressure steam that waste-heat recovery device 7 is produced directly drags main exhauster of sintering 11, from electricity when quantity of steam is not enough
Net power taking continues to the normal work of main exhauster of sintering 11, to electrical network reverse power generation when quantity of steam is more than needed；Waste-heat recovery device 7
Requirement of the low-pressure steam of generation according to SINTERING PRODUCTION to thermal source quality, is rationally applied to the bed of material after desulfurization waste liquor crystallization, cloth
The operations such as heating, realize step application and the industrial reuse of waste heat, realize the linkage that middle pressure steam dragging-low-pressure steam is heated
Pattern；
4th, sintering feed temperature is improved as thermal source after the purified process of heat smoke that waste-heat recovery device 7 is produced, while
It is used to improve sintering ignition temperature into ignition furnace of sintering machine 2.Realize the direct heat utilization of waste heat waste gas-process waste reuse
Linkage pattern.
With reference to Fig. 1, Fig. 2, the present invention has the advantage that compared with conventional sintering ore deposit UTILIZATION OF VESIDUAL HEAT IN technique：
1) present invention directly drags the replacement traditional handicraft of main exhauster of sintering 11 main exhauster of sintering 11 using middle pressure steam
Drag from electrical network power taking, traditional chiller (cold with cold/ring) 18 replaced using vertical chiller 6 during waste heat recovery,
The quantity of cooling blower used 9 is less than chiller blower fan 20, being capable of reducing energy consumption and cost of investment；After waste-heat recovery device 7
The heat smoke that smoke exhaust fan 8 is extracted out is applied to the head air bells cap 3 of the front portion of sintering machine 4 and the tail air bells cap 5 of afterbody to be used to adjust
High sinter bed temperature, while acting on sintering ignition furnace 2 to improve sintering ignition temperature, realizes the direct diarrhea of heat type of waste heat waste gas
With the linkage pattern of-technique reuse.
2) compared with conventional sintering ore deposit UTILIZATION OF VESIDUAL HEAT IN technique, the heat smoke in the present invention is directly entered waste-heat recovery device 7
Carry out recuperation of heat, instead of in traditional handicraft heat smoke by under the draft of circulating fan 19 effect at chiller (cold with cold/ring)
The process of recuperation of heat is circulated between 18 and waste-heat recovery device 7, energy resource consumption is not only reduced, and is substantially increased more than flue gas
Efficiency of utilization.
3) compared with conventional sintering ore deposit waste heat reclaiming process, the present invention is lifting sintering deposit residual heat resources by technological means
While utilization ratio, afterheat steam is further carried out reasonable, optimization and is used；Middle pressure steam and low-pressure steam are generated simultaneously,
Middle pressure steam is used to directly drag main exhauster of sintering 11, reduces energy conversion loss, and low-pressure steam is straight as the middle energy
Connect, be used for SINTERING PRODUCTION link nearby, realize the comprehensive utilization to greatest extent of afterheat steam.
The above, the only present invention preferably specific embodiment, but protection scope of the present invention is not limited thereto,
Any those familiar with the art the invention discloses technical scope in, technology according to the present invention scheme and its
Inventive concept equivalent or change in addition, all should be included within the scope of the present invention.
Claims (5)
1. a kind of coordinated type sintering deposit waste heat recovery comprehensive utilization process, it is characterised in that heat sinter enters vertical cooling dress
Cool down with cooling wind heat exchange in putting, the hot blast after heat exchange is entered in waste-heat recovery device and generates middle pressure steam and low pressure steaming simultaneously
Vapour, wherein middle pressure steam are used to directly drag main exhauster of sintering, and low-pressure steam is used as desulfurization after flue gas of sintering machine technique
The heat source stream of waste liquid crystallization device and as sintering deposit layer surface injection steam after ignition of sintering process；Jing waste heat recoveries are filled
Cause after the purified process of hot waste gas for postponing in sintering device handpiece air bells cap, tail air bells cap as hot gas sintering thermal source and
Introduce in ignition furnace of sintering machine as combustion-supporting hot blast.
2. a kind of coordinated type sintering deposit waste heat recovery comprehensive utilization process according to claim 1, it is characterised in that concrete
Comprise the steps：
1) sinter mixture Jing distributing devices cloth expected in sintering pallet, using igniting furnace igniting, while starting the main convulsion of sintering
Machine carries out down draft sintering, sprays steam to sintering deposit layer surface within 5～10 minutes after igniting, and the pressure of steam is 0.2～0.5MPa,
Temperature is 200～300 DEG C；Sinter mixture moves forward with sintering machine operation, through wet layer, drying layer, preliminary heating zone, sinter layer and burning
Heat sinter is formed after the sintering transformation of knot ore bed；Sintering flue gas under sintering machine removing dust device, main exhauster of sintering, cigarette successively
Desulfurization device carries out purified treatment, it is up to standard after Jing smoke stack emissions；
2) more than 700 DEG C of heat sinter carries out hot friendship in vertical chiller with cooling wind after crushing in sintering machine tail
Change, be cooled to outside less than 150 DEG C of sintering deposit and arrange；450～500 DEG C of hot blast enters waste-heat recovery device after heat exchange, enters with water
Steam is produced after row heat exchange；Waste-heat recovery device is provided with middle pressure drum and low pressure drum；The pressure of middle pressure drum output >=
Interior energy is converted into mechanical energy by the middle pressure steam of 0.6MPa into steam turbine, drives synchronous motor to rotate by speed change clutch
And drag main exhauster of sintering operating；Dragged when sintering starts and from electrical network power taking by synchronous motor when quantity of steam is not enough and burnt
Knot main exhauster work, unnecessary electricity is connected to the grid when quantity of steam is remaining；
3) low-pressure steam point of the pressure ＜ 0.6MPa of waste-heat recovery device low pressure drum output is all the way or two-way is exported, wherein one
Road is desulfurization waste liquor crystallization apparatus in the desulfurization waste liquor crystallization apparatus that low-pressure steam is transported to after flue gas of sintering machine technique
Realize that desulfurization waste liquor is crystallized using flash concentration method, its heater is using steam as thermal source；Another road is that low-pressure steam is defeated
In being sent to multiple rows of steam jet of pallet top arrangement, low-pressure steam is to the injection of sintering deposit layer surface by multiple spray orifices
Realize intensified-sintered；After sintering deposit top layer injection steam, steam enters quickly the bed of material under the draft of main exhauster of sintering, by
Top layer sintering deposit temperature in now is typically not less than 100 DEG C, and steam will not be produced after contacting with sintering deposit and condense into aqueous water,
200～300 DEG C of steam can play insulation effect to sintering deposit top layer, reduce the rate of cooling of sintering deposit；Steam is descending to be passed through
Sintering deposit band, quickly into combustion zone, combustion zone temperature is up to more than 1300 DEG C, and steam resolves into quickly H2With O2, and and fuel
C reactions generate CO or CO2；H2Reduction reaction is carried out to iron ore as strong reductant with CO, FeO even metallic irons are generated, can be promoted
Entering the FeO contents of sintering deposit increases, and can save compound with charcoal；On the other hand, the O that steam is resolved into2Accelerate fuel combustion
It is sintering velocity to burn response speed, and deep-bed sintering resistance can be overcome to increase the defect of hypoventilation；Combustion reaction is generated
CO2Into waste gas, fuel availability is improve；The high-temperature steam generated after reduction of iron ore reaction, sequentially enters the pre- of the bed of material
The torrid zone, dry zone, compound band are preheated, and especially by the temperature for improving compound band the shadow of excessive moistening layer can be eliminated
Ring, improve the quality of sintering deposit；
4) the hot waste gas Jing smoke exhaust fans of more than 150 DEG C Jing after waste-heat recovery device heat exchange of the hot blast that vertical chiller is produced
Draw, sintering device handpiece air bells cap, tail air bells cap and ignition furnace of sintering machine are respectively outputted to as thermal source after purified process
It is interior；Hot waste gas is introduced in sintering device handpiece air bells cap and tail air bells cap, for improving the sintering deposit material layer temperature on sintering machine
Hot gas sintering is realized, hot gas sintering improves sintering deposit bed of material top sintering temperature, amount of liquid phase increases, while liquid phase viscosity drop
It is low, be conducive to mineral sufficient crystallising, amount of glassy phase to reduce, so as to improve the overall yield rate of sintering and sinter strength；Will
Hot waste gas is introduced in ignition furnace of sintering machine as combustion-supporting hot blast, it is possible to increase ignition of sintering process temperature, improves sintering condition and steady
Determine sintering deposit temperature.
3. it is used to realize a kind of coordinated type sintering deposit waste heat recovery utilization system of technique described in claim 1, its feature
It is, including sintering machine, vertical chiller, waste-heat recovery device, steam turbine, synchronous motor, main exhauster of sintering, dedusting
Device, flue-gas desulfurizing device of sintering device, desulfurization waste liquor crystallization apparatus and chimney；The sintering machine afterbody sets up formula chiller, stands
Heat sinter entrance is set at the top of formula chiller, bottom sets cold sinter outlet, and bottom sets cooling wind air inlet with cooling wind
Machine is connected, and top sets hot-blast outlet connection waste-heat recovery device；
Middle pressure drum and low pressure drum are set in waste-heat recovery device, middle pressure drum connects steam turbine, vapour by Medium Pressure Steam Pipeline
The power end of turbine drives synchronous motor, synchronous motor to drag main exhauster of sintering by speed change clutch；Sintering machine bottom
The main smoking road in portion connects the air inlet of main exhauster of sintering, the air outlet connection sintering machine cigarette of main exhauster of sintering by cleaner unit
Desulfurization device；The neat stress outlet connection chimney of flue-gas desulfurizing device of sintering device, desulfurization waste liquor outlet connection desulfurization waste liquor knot
The desulfurization waste liquor entrance of brilliant device；
Low pressure drum in waste-heat recovery device is divided into two steam branch roads, a steam branch road connection by low-pressure steam pipeline
Desulfurization waste liquor crystallization apparatus heater；Steam jet above another steam branch road connection pallet；
The hot waste gas outlet of waste-heat recovery device connects hot waste gas pipeline by smoke exhaust fan, and hot waste gas pipeline is sequentially connected sintering
The combustion-supporting hot-wind inlet of lighter in the tail air bells cap of machine, head air bells cap and ignition furnace.
4. a kind of coordinated type sintering deposit waste heat recovery utilization system according to claim 3, it is characterised in that described
Waste-heat recovery device is waste heat boiler.
5. a kind of coordinated type sintering deposit waste heat recovery utilization system according to claim 3, it is characterised in that described
Flue-gas desulfurizing device of sintering device is wet-type magnesia desulfurizer；The desulfurization waste liquor crystallization apparatus are crystallizing evaporator.
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