CN106595327B - A kind of coordinated type sinter waste heat recycling comprehensive utilization process and system - Google Patents
A kind of coordinated type sinter waste heat recycling comprehensive utilization process and system Download PDFInfo
- Publication number
- CN106595327B CN106595327B CN201710014244.9A CN201710014244A CN106595327B CN 106595327 B CN106595327 B CN 106595327B CN 201710014244 A CN201710014244 A CN 201710014244A CN 106595327 B CN106595327 B CN 106595327B
- Authority
- CN
- China
- Prior art keywords
- sintering
- sinter
- waste
- steam
- heat
- 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.)
- Active
Links
Classifications
-
- 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
-
- 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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention relates to a kind of coordinated type sinter waste heat recycling comprehensive utilization process and systems, heat sinter enters in vertical cooling device to be cooled down with cooling wind heat exchange, hot wind after heat exchange enters in waste-heat recovery device while generating middle pressure steam and low-pressure steam, wherein middle pressure steam is for directly dragging main exhauster of sintering, heat source stream that low-pressure steam is used as desulfurization waste liquor crystallization apparatus after flue gas of sintering machine technique and as sinter layer surface injection steam after ignition of sintering process；Sintering device handpiece air bells cap is led to after the purified processing of hot waste gas after waste-heat recovery device, in tail air bells cap as the heat source of hot gas sintering and is introduced in ignition furnace of sintering machine as combustion-supporting hot wind.The present invention realizes the maximization of sinter utilization rate of waste heat, and finally realizes purpose that is energy-saving, reducing production cost；The craft science is reasonable, practical, reliable for operation, and existing sintering process is sufficiently integrated, technological improvement small investment, quick.
Description
Technical field
The present invention relates to metal smelt and heat recovery technical field more particularly to a kind of coordinated type sinter waste heats
Recycle comprehensive utilization process and system.
Background technique
The energy consumption of steel enterprise sintering process accounts for about the 15% of production total energy consumption, is only second to Iron-smelting.Sintering process produces
Raw residual heat resources include sintering mine sensible heat and sintering flue gas sensible heat, the cooling that they are discharged by sinter cooler top respectively
Entrained by exhaust gas and the sintering flue gas of sintering machine lower part extraction.The residual heat resources amount of the large and medium-sized iron and steel enterprise 1t sinter in China is about
For 0.94GJ, the 70.87% of sintering waste heat total resources is accounted for, accounts for the 11.14% of entire iron and steel enterprise's residual heat resources total amount, but real
The sinter residual heat resources rate of recovery on border is very low, and only 29.79%.
As shown in Figure 1, being a kind of sintering waste heat recovery system commonly used at present, heat sinter enters cold after sintering machine
But 18 cooling wind blasted with cooling device blower 20 of device (straight line cooler or circular cooler) exchanges heat, after heat exchange
Hot wind, which enters in waste-heat recovery device 7, generates superheated steam with water heat exchange, and for superheated steam for generating electricity, electricity is incorporated to electricity
Net；The flue gas of 4 bottom of sintering machine is extracted out by main exhauster of sintering 11, de- by deduster 12 and flue-gas desulfurizing device of sintering device 14
It is discharged after sulphur purification by chimney 13.A part of sintering waste heat can be recycled although with above system, but its be not carried out it is remaining
The maximization of recuperation of heat.Because the bed of material on cooling device is excessively thin using straight line cooler or circular cooler, it is sintered realizing
The waste heat quality that mine is recycled while cooling is low (hot blast temperature is only 200~300 DEG C).And cooling device and cooling wind
Import and export uses Dynamic link library, leaks out serious, causes thermal loss big；Therefore, sintering waste heat recycling efficiency needs at present
It improves.
Efficiency is recycled in order to improve sintering waste heat, occurs the vertical cooling device of sinter in recent years.Such as application number
One kind disclosed in Chinese patent for 201510445662.4 " vertical type cooling tower and sintering waste heat utilization system "；Application number
" a kind of vertical cooling kiln " disclosed in Chinese patent for 201310419503.8；Application No. is 201410280340.4 China
One kind " vertical helical distributary cooling heat exchange device and its method for sintering waste heat generating system " of patent disclosure；Application number
One kind disclosed in Chinese patent for 200910187381.8 " the perpendicular pot type recyclable device of waste heat resources in sintering process and utilization side
Method " etc., above-mentioned patented technology generate afterheat steam for sintering mine sensible heat recycling and are studied, and lay particular emphasis on waste-heat recovery device
The research of structure, cloth wind mode etc. can be improved waste heat recycling quality (hot blast temperature is higher than 450 DEG C), but steam to waste heat
The usage mode of vapour is fairly simple, and substantially by the way of directly carrying out 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 recycling
It generallys use waste heat recycling and generates steam, recycle hot steam to generate electricity, given by being applied after power Transmission and electrical power conversion
End user, such UTILIZATION OF VESIDUAL HEAT IN need to be converted by multiple thermal energy, reduce utilization rate of waste heat.As it can be seen that more than vertical sinter
Heat recovery apparatus utilization efficiency still remains room for promotion.
Summary of the invention
The present invention provides a kind of coordinated type sinter waste heat recycling comprehensive utilization process and systems, using vertical cooling dress
It puts back into and receives sinter waste heat, 450~500 DEG C of hot wind generates middle pressure steam and low-pressure steam through waste-heat recovery device again；Steam
Using using directly utilizing, utilize nearby, rationally utilize and the principle of classified utilization reaches the maximization of utilization efficiency, and it is final
Realize purpose that is energy-saving, reducing production cost；The craft science is reasonable, practical, reliable for operation, by existing sintering
Technique is sufficiently integrated, technological improvement small investment, quick.
In order to achieve the above object, the present invention is implemented with the following technical solutions:
A kind of coordinated type sinter waste heat recycling comprehensive utilization process, heat sinter enters in vertical cooling device and cooling
Wind heat exchange cooling, the hot wind after heat exchange enter in waste-heat recovery device while generating middle pressure steam and low-pressure steam, wherein middle pressure
Steam is for directly dragging main exhauster of sintering, and low-pressure steam is as desulfurization waste liquor crystallization apparatus after flue gas of sintering machine technique
The heat source stream used and as sinter layer surface injection steam after ignition of sintering process；Hot waste gas after waste-heat recovery device
It is led to after purified processing in sintering device handpiece air bells cap, tail air bells cap as the heat source of hot gas sintering and introducing sintering machine point
Combustion-supporting hot wind is used as in stove.
A kind of coordinated type sinter waste heat recycling comprehensive utilization process, specifically comprises the following steps:
1) sinter mixture is expected in sintering pallet through distributing device cloth, using igniting furnace igniting, while starting sintering master
Exhaust fan carries out down draft sintering, sprays steam to sinter layer surface within 5~10 minutes after igniting, and the pressure of steam is 0.2~
0.5MPa, temperature are 200~300 DEG C；Sinter mixture runs with sintering machine and moves forward, through excessive moistening layer, drying layer, preliminary heating zone, burning
Knot layer and the sintering for being sintered ore bed form heat sinter after changing；Sintering flue gas under sintering machine is successively led through deduster, sintering
Exhaust fan, flue gas desulfurization device carry out purified treatment, it is up to standard after through smoke stack emission；
2) 700 DEG C or more of heat sinter enters in vertical cooling device after crushing in sintering machine tail and carries out with cooling wind
Heat exchange is cooled to 150 DEG C of sinter outlets below；450~500 DEG C of hot wind enters waste-heat recovery device after heat exchange, together
Water generates steam after carrying out heat exchange；Waste-heat recovery device is equipped with middle pressure drum and low pressure drum；The pressure of middle pressure drum output
The middle pressure steam of >=0.6MPa, which enters steam turbine, can be converted into mechanical energy for interior, drive synchronous motor to turn by speed change clutch
It moves and drags main exhauster of sintering operating；When sintering starts and electric dragging is taken from power grid by synchronous motor when quantity of steam deficiency
Main exhauster of sintering work, when quantity of steam residue, extra electricity was connected to the grid；
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 exports,
In be desulfurization waste liquor crystallization in desulfurization waste liquor crystallization apparatus after low-pressure steam to be transported to flue gas of sintering machine technique all the way
Device realizes desulfurization waste liquor crystallization using flash concentration method, and heater is using steam as heat source；Another way is to steam low pressure
Vapour is transported in the multiple rows of steam jet arranged above pallet, and low-pressure steam is sprayed by multiple spray orifices to sinter layer surface
Penetrate realize it is intensified-sintered；After spraying steam to sinter surface layer, steam enters material quickly under the draft of main exhauster of sintering
Layer, since surface layer sinter temperature at this time is generally not less than 100 DEG C, steam will not generate after contacting with sinter and condense into liquid
State water, 200~300 DEG C of steam can play insulation effect to sinter surface layer, reduce the cooling velocity of sinter；Steam downlink
Across sinter band, enter combustion zone quickly, combustion zone temperature is up to 1300 DEG C or more, and steam resolves into H quickly2With O2, and with
Fuel C reaction generates CO or CO2；H2Reduction reaction is carried out to iron ore as strong reductant with CO, generates FeO even metallic iron,
The FeO content of energy acceleration of sintering mine increases, and can save mixture with charcoal；On the other hand, the O that steam resolves into2Accelerate combustion
Expect combustion velocity, that is, sintering velocity, deep-bed sintering resistance can be overcome to increase the defect of hypoventilation；Combustion reaction
Generate CO2Into exhaust gas, fuel availability is improved；The high-temperature steam generated after reduction of iron ore reaction, sequentially enters the bed of material
Preheating zone, dry zone, mixture band preheated, excessive moistening layer can be eliminated especially by the temperature for improving mixture band
It influences, improves the quality of sinter；
4) 150 DEG C or more of hot waste gas of the hot wind that vertical cooling device generates after waste-heat recovery device exchanges heat is through discharging fume
Blower is drawn, and is respectively outputted to sintering device handpiece air bells cap, tail air bells cap and sintering machine point as heat source after purified processing
In stove；Hot waste gas introduces in sintering device handpiece air bells cap and tail air bells cap, for improving the sinter bed of material on sintering machine
Temperature realizes hot gas sintering, and hot gas sintering improves sinter bed of material top sintering temperature, amount of liquid phase increases, while liquid phase is glutinous
Degree reduces, and is conducive to mineral sufficient crystallising, and amount of glassy phase is reduced, to improve the whole yield rate of sintering and sinter is strong
Degree；Hot waste gas is introduced and is used as combustion-supporting hot wind in ignition furnace of sintering machine, can be improved ignition of sintering process temperature, improves sintering condition
And stabilized sinter temperature.
Utilization system is recycled for realizing a kind of coordinated type sinter waste heat of the technique, including sintering machine, vertical
Formula cooling device, waste-heat recovery device, steam turbine, synchronous motor, main exhauster of sintering, deduster, flue gas of sintering machine
Device, desulfurization waste liquor crystallization apparatus and chimney；Formula cooling device is set up in the sintering machine tail portion, sets at the top of vertical cooling device
Heat sinter entrance, bottom set cold sinter outlet, and lower part sets cooling wind air inlet and is connected with cooling blower, and top sets hot wind 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
The power end of machine, steam turbine drives synchronous motor by speed change clutch, and synchronous motor drags main exhauster of sintering；Sintering
The main smoking road of motor spindle connects the air inlet of main exhauster of sintering by deduster, and the air outlet of main exhauster of sintering connects sintering
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 are useless
The desulfurization waste liquor entrance of liquid crystallization apparatus；
Low pressure drum in waste-heat recovery device is divided into two steam branches, a steam branch by low-pressure steam pipeline
Connect desulfurization waste liquor crystallization apparatus heater；Steam jet above another steam branch 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 igniter 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 is evaporation
Crystallizer.
Compared with prior art, the beneficial effects of the present invention are:
1) it is sufficiently integrated with existing sintering process, directly drags main pumping using the steam that the recycling of hot sinter waste heat generates
Blower, while waste heat hot fume after the recovery is for heating and improving sintering ignition temperature after sintering feed；Both sufficiently recycling
Sinter waste heat, and the direct utilization of the energy is realized, thermal energy conversion times are reduced, sintering waste heat recycling effect is substantially increased
Rate；
2) practical operation situation for combining sintering process carries out abundant, reasonable, science classification to the steam of waste heat recycling
It utilizes, while improving waste heat recovery efficiency, it is determined that steam utilization optimizing process definitely；
3) high temperature heat for efficiently, economically utilizing hot sinter reaches mesh that is energy-saving, reducing production cost
, the technique is practical in actual production, reliable for operation, has dramatically practiced advocating for " energy-saving and emission-reduction " of country
View.
Detailed description of the invention
Fig. 1 is sinter UTILIZATION OF VESIDUAL HEAT IN common process process schematic.
Fig. 2 is coordinated type sinter waste heat recycling comprehensive utilization process process schematic of the present invention.
In figure: the vertical cooling of 1. distributing device, 2. ignition furnace, 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 22. low pressure drum of drum, 23. desulfurization is pressed in 20. cooling device blower 21. of device (cold with cold/ring) 19. circulating fan
Waste liquid crystallization device
Specific embodiment
Specific embodiments of the present invention will be further explained with reference to the accompanying drawing:
As shown in Fig. 2, a kind of coordinated type sinter waste heat of the present invention recycles comprehensive utilization process, heat sinter enters
It is cooled down in vertical cooling device 6 with cooling wind heat exchange, the hot wind after heat exchange, which enters in waste-heat recovery device 7 while pressing in generating, to be steamed
Vapour and low-pressure steam, wherein for middle pressure steam for directly dragging main exhauster of sintering 11, low-pressure steam is de- as sintering device flue gas
The heat source stream and spray as sinter layer surface after the igniting of sintering machine 4 with steaming that desulfurization waste liquor crystallization apparatus 23 is used after sulphur technique
Vapour；Sintering device handpiece air bells cap 3 is led to after the purified processing of hot waste gas after waste-heat recovery device 7, is made in tail air bells cap 5
To be used as combustion-supporting hot wind in the heat source and introducing ignition furnace of sintering machine 2 of hot gas sintering.
As shown in Fig. 2, a kind of coordinated type sinter waste heat of the present invention recycles comprehensive utilization process, specifically include as follows
Step:
1) sinter mixture is expected in 4 trolley of sintering machine through 1 cloth of distributing device, is lighted a fire using ignition furnace 2, while starting sintering
Main exhauster 11 carries out down draft sintering, sprays steam to sinter layer surface within 5~10 minutes after igniting, the pressure of steam is 0.2
~0.5MPa, temperature are 200~300 DEG C；Sinter mixture with sintering machine 4 run move forward, through excessive moistening 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 is successively through deduster 12, burning
Main exhauster 11, the progress purified treatment of flue gas desulfurization device 14 are tied, is discharged after up to standard through chimney 13；
2) 700 DEG C or more of heat sinter sintering machine tail enter after crushing in vertical cooling device 6 with cooling wind into
Row heat exchange is cooled to 150 DEG C of sinter outlets below；450~500 DEG C of hot wind enters waste-heat recovery device 7 after heat exchange,
Steam is generated after carrying out heat exchange with water；Waste-heat recovery device 7 is equipped with middle pressure drum 21 and low pressure drum 22；Middle pressure drum 21 is defeated
Pressure >=0.6MPa middle pressure steam out, which enters steam turbine 17, can be converted into mechanical energy for interior, be driven by speed change clutch 16
Synchronous motor 15 rotates and drags the operating of main exhauster of sintering 11；Sintering start when and when quantity of steam deficiency it is electronic by synchronizing
Machine 15 takes electricity dragging main exhauster of sintering 11 to work from power grid, and when quantity of steam residue, extra electricity was connected to the grid；
3) low-pressure steam point for the pressure < 0.6MPa that waste-heat recovery device low pressure drum 22 exports is all the way or two-way exports,
It is wherein desulfurization waste liquor in the desulfurization waste liquor crystallization apparatus 23 after low-pressure steam to be transported to flue gas of sintering machine technique all the way
Crystallization apparatus 23 realizes desulfurization waste liquor crystallization using flash concentration method, and heater is using steam as heat source；Another way be by
Low-pressure steam is transported in the multiple rows of steam jet arranged above pallet, and low-pressure steam passes through multiple spray orifices to sintering ore bed
Surface injection is realized intensified-sintered；To sinter surface layer spray steam after, steam under the draft of main exhauster of sintering 11 very
F.F. enters the bed of material, and since surface layer sinter temperature at this time is generally not less than 100 DEG C, steam will not generate after contacting with sinter
Liquid water is condensed into, 200~300 DEG C of steam can play insulation effect to sinter surface layer, reduce the cooling velocity of sinter；
Steam downlink passes through sinter band, enters combustion zone quickly, and combustion zone temperature is up to 1300 DEG C or more, and steam resolves into H quickly2
With O2, and reacted with fuel C and generate CO or CO2；H2Reduction reaction is carried out to iron ore as strong reductant with CO, generates FeO very
To metallic iron, the FeO content of energy acceleration of sintering mine increases, and can save mixture with charcoal；On the other hand, the O that steam resolves into2
Fuel combustion reaction speed i.e. sintering velocity is accelerated, deep-bed sintering resistance can be overcome to increase the defect of hypoventilation；
Combustion reaction generates CO2Into exhaust gas, fuel availability is improved；The high-temperature steam generated after reduction of iron ore reaction, successively
It is preheated into the preheating zone of the bed of material, dry zone, mixture band, can be eliminated especially by the temperature for improving mixture band
The influence of excessive moistening layer improves the quality of sinter；
4) 150 DEG C or more of hot waste gas of the hot wind that vertical cooling device 6 generates after the heat exchange of waste-heat recovery device 7 is through arranging
Cigarette blower 8 is drawn, and is respectively outputted to sintering device handpiece air bells cap 3, tail air bells cap 5 and sintering as heat source after purified processing
In machine ignition furnace 2；Hot waste gas introduces in sintering device handpiece air bells cap 3 and tail air bells cap 5, for improving the burning on sintering machine 4
It ties mine material layer temperature and realizes hot gas sintering, hot gas sintering improves sinter 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 is reduced, to improve sintering whole yield rate and burning
Tie mine intensity；Hot waste gas is introduced and is used as combustion-supporting hot wind in ignition furnace of sintering machine 2, can be improved 4 firing temperature of sintering machine, is improved
Sintering condition and stabilized sinter temperature.
Utilization system is recycled for realizing a kind of coordinated type sinter waste heat of the technique, including sintering machine 4, vertical
Formula cooling device 6, waste-heat recovery device 7, steam turbine 17, synchronous motor 15, main exhauster of sintering 11, deduster 12, sintering
Machine flue gas desulfurization device 14, desulfurization waste liquor crystallization apparatus 23 and chimney 13；Formula cooling device 6 is set up in 4 tail portion of sintering machine, stands
The top of formula cooling device 6 sets heat sinter entrance, and bottom sets cold sinter outlet, and lower part sets cooling wind air inlet and 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 by speed change clutch 16, and synchronous motor 15 drags
Main exhauster of sintering 11；The main smoking road 10 in 4 bottom of sintering machine connects the air inlet of main exhauster of sintering 11 by deduster 12, burns
The air outlet for tying main exhauster 11 connects flue-gas desulfurizing device of sintering device 14；The neat stress of flue-gas desulfurizing device of sintering device 14 exports
Connect 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 branches, a steam by low-pressure steam pipeline
Branch connects 23 heater of desulfurization waste liquor crystallization apparatus；Steam jet above another steam branch 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 successively connects
Connect the combustion-supporting hot-wind inlet of igniter in the tail air bells cap 5, head air bells cap 3 and 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 is
Crystallizing evaporator.
As shown in Fig. 2, a kind of working principle of coordinated type sinter waste heat recycling comprehensive utilization process of the present invention is:
Cooling blower 9 blasts cooling wind into vertical cooling device 6 and heat sinter exchanges heat, and the hot wind obtained after heat exchange enters remaining nearby
The waste heat energy in hot wind is converted steam by heat recovery apparatus 7, and pressure saturated vapor is burnt for dragging in the middle output of pressure drum 21
Main exhauster 11 is tied, electricity can be taken to maintain main exhauster of sintering 11 normal from power grid by synchronous motor 15 when quantity of steam deficiency
Work, to power grid reverse power generation when quantity of steam is more than needed；Low pressure drum 22 exports low-pressure saturated steam, produces feelings according to sintering machine 4
Condition is distributed into the steam jet above desulfurization waste liquor crystallization apparatus 23 and pallet to improve material temperature.
The present invention realizes heat sinter-cooling wind, vertical 6-waste-heat recovery device of cooling device 7, middle pressure steam and drags
Dynamic-low-pressure steam heating, a variety of linked manners of the direct heat utilization of waste heat exhaust gas-process waste reuse, realizes sinter
Material stream and both sinter residual heat resources energy streams collaboration coupling, to largely improve sinter waste heat
Utilization efficiency:
One, hot sinter enters inside vertical cooling device 6, and sinter delays from top to bottom in vertical cooling device 6
It is slow mobile, it is cooled to 150 DEG C of sinters below and is moved discharge；Cooling wind flows from bottom to top in vertical cooling device 6,
Realize heat sinter-cooling wind linkage pattern；
Two, cooling wind is with 450 DEG C or more hot winds are heated to form after sinter heat exchange in vertical cooling device 6, and hot wind is just
Closely enter waste-heat recovery device 7 and water heat exchange generates steam, the hot fume after the cooling of waste-heat recovery device 7 returns to sintering machine
To improve sinter bed temperature on 4；By the hot linking of vertical cooling device 6 and waste-heat recovery device 7, tradition is changed
The phenomenon that hot wind leakage leads to serious heat loss in ring cold machine cooling procedure realizes vertical 6-waste heat of cooling device recycling dress
Set 7 linkage patterns；
Three, the middle pressure steam that waste-heat recovery device 7 generates directly drags main exhauster of sintering 11, and quantity of steam is less than Shi Cong electricity
Net takes electricity to continue to the normal work of main exhauster of sintering 11, to power grid 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 heat source quality is rationally applied to the bed of material after desulfurization waste liquor crystallization, cloth
The processes such as heating realize step application and the industrial reuse of waste heat, realize middle pressure steam dragging-low-pressure steam heating linkage
Mode；
Four, sintering feed temperature is improved as heat source after the purified processing of hot fume that waste-heat recovery device 7 generates, simultaneously
Into ignition furnace of sintering machine 2 for improving sintering ignition temperature.Realize the direct heat utilization of waste heat exhaust gas-process waste reuse
Linkage pattern.
With reference to Fig. 1, Fig. 2, the present invention has the advantages that compared with conventional sintering mine UTILIZATION OF VESIDUAL HEAT IN technique
1) present invention directly drags main exhauster of sintering 11 using middle pressure steam and replaces traditional handicraft main exhauster of sintering 11
Electric dragging is taken from power grid, vertical cooling device 6 is utilized to replace traditional cooling device (cold with cold/ring) 18 in waste heat removal process,
The quantity of cooling blower 9 used is less than cooling device blower 20, can reduce energy consumption and cost of investment；After waste-heat recovery device 7
The hot fume that smoke exhaust fan 8 is extracted out is applied to the head air bells cap 3 of 4 front of sintering machine and the tail air bells cap 5 of tail portion for adjusting
High sinter bed temperature, while sintering ignition furnace 2 is acted on to improve sintering ignition temperature, realize waste heat exhaust gas directly heat benefit
With the linkage pattern of-technique reuse.
2) compared with conventional sintering mine UTILIZATION OF VESIDUAL HEAT IN technique, the hot fume in the present invention is directly entered waste-heat recovery device 7
Recuperation of heat is carried out, at cooling device (cold with cold/ring) under being acted on instead of hot fume in traditional handicraft by 19 draft of circulating fan
The process that recuperation of heat is recycled between 18 and waste-heat recovery device 7, not only reduces energy consumption, and substantially increase more than flue gas
Efficiency of heating- utilization.
3) compared with conventional sintering mine waste heat reclaiming process, the present invention is promoting sinter residual heat resources by technological means
While utilization efficiency, afterheat steam further progress is reasonable, optimization is used；Middle pressure steam and low-pressure steam are generated simultaneously,
Middle pressure steam reduces energy conversion loss, low-pressure steam is straight as the intermediate energy for directly dragging main exhauster of sintering 11
It connects, nearby for sintering production link, realizes the comprehensive utilization to greatest extent of afterheat steam.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (4)
1. a kind of coordinated type sinter waste heat recycles comprehensive utilization process, which is characterized in that heat sinter enters vertical cooling dress
It is cooled down in setting with cooling wind heat exchange, the hot wind after heat exchange enters in waste-heat recovery device while generating middle pressure steam and low pressure is steamed
Vapour, wherein middle pressure steam is for directly dragging main exhauster of sintering, and low-pressure steam is as desulfurization after flue gas of sintering machine technique
Heat source stream that waste liquid crystallization device is used and as sinter layer surface injection steam after ignition of sintering process；It recycles and fills through waste heat
Led to after the purified processing of the hot waste gas postponed in sintering device handpiece air bells cap, tail air bells cap as the heat source of hot gas sintering and
It introduces and is used as combustion-supporting hot wind in ignition furnace of sintering machine,
The coordinated type sinter waste heat recycling comprehensive utilization process specifically comprises the following steps:
1) sinter mixture is expected in sintering pallet through distributing device cloth, using igniting furnace igniting, while starting the main exhausting of sintering
Machine carries out down draft sintering, sprays steam to sinter 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 runs with sintering machine and moves forward, through excessive moistening 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 is successively through deduster, main exhauster of sintering, cigarette
Desulfurization device carry out purified treatment, it is up to standard after through smoke stack emission；
2) 700 DEG C or more of heat sinter enters in vertical cooling device after crushing in sintering machine tail carries out hot friendship with cooling wind
It changes, is cooled to 150 DEG C of sinter outlets below；450~500 DEG C of hot wind enters waste-heat recovery device after heat exchange, with water into
Steam is generated after row heat exchange；Waste-heat recovery device is equipped with middle pressure drum and low pressure drum；The pressure of middle pressure drum output >=
The middle pressure steam of 0.6MPa, which enters steam turbine, can be converted into mechanical energy for interior, drive synchronous motor rotation by speed change clutch
And drag main exhauster of sintering operating；Electricity dragging is taken to burn from power grid when sintering starts and by synchronous motor when quantity of steam deficiency
Main exhauster work is tied, when quantity of steam residue, extra electricity was connected to the grid；
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 exports, wherein one
Road is desulfurization waste liquor crystallization apparatus in the desulfurization waste liquor crystallization apparatus after low-pressure steam to be transported to flue gas of sintering machine technique
Desulfurization waste liquor crystallization is realized using flash concentration method, heater is using steam as heat source；Another way is that low-pressure steam is defeated
It is sent in the multiple rows of steam jet arranged above pallet, low-pressure steam is to the injection of sinter layer surface by multiple spray orifices
It realizes intensified-sintered；After spraying steam to sinter surface layer, steam enters the bed of material quickly under the draft of main exhauster of sintering, by
Surface layer sinter temperature at this time is generally not less than 100 DEG C, and steam will not generate after contacting with sinter and condense into liquid water,
200~300 DEG C of steam can play insulation effect to sinter surface layer, reduce the cooling velocity of sinter；Steam downlink passes through
Sinter band enters combustion zone quickly, and combustion zone temperature is up to 1300 DEG C or more, and steam resolves into H quickly2With O2, and and fuel
C reaction generates CO or CO2；H2Reduction reaction is carried out to iron ore as strong reductant with CO, FeO even metallic iron is generated, can promote
FeO content into sinter increases, and can save mixture with charcoal；On the other hand, the O that steam resolves into2Accelerate fuel combustion
Reaction speed, that is, sintering velocity is burnt, deep-bed sintering resistance can be overcome to increase the defect of hypoventilation；Combustion reaction generates
CO2Into exhaust gas, fuel availability is improved；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, mixture band are preheated, and the shadow of excessive moistening layer can be eliminated especially by the temperature for improving mixture band
It rings, improves the quality of sinter；
4) 150 DEG C or more of hot waste gas of the hot wind that vertical cooling device generates after waste-heat recovery device exchanges heat is through smoke exhaust fan
It draws, is respectively outputted to sintering device handpiece air bells cap, tail air bells cap and ignition furnace of sintering machine as heat source after purified processing
It is interior；Hot waste gas introduces in sintering device handpiece air bells cap and tail air bells cap, for improving the sinter material layer temperature on sintering machine
Realize hot gas sintering, hot gas sintering improves sinter 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 is reduced, to improve the whole yield rate of sintering and sinter strength；It will
Hot waste gas, which introduces, is used as combustion-supporting hot wind in ignition furnace of sintering machine, can be improved ignition of sintering process temperature, improves sintering condition and steady
Determine sinter temperature.
2. a kind of coordinated type sinter waste heat for realizing technique described in claim 1 recycles utilization system, feature
It is, including sintering machine, vertical cooling device, 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；Formula cooling device is set up in the sintering machine tail portion, stands
Heat sinter entrance is set at the top of formula cooling device, bottom sets cold sinter outlet, and lower part sets cooling wind air inlet and 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 by speed change clutch, and synchronous motor drags main exhauster of sintering；Sintering machine bottom
The main smoking road in portion connects the air inlet of main exhauster of sintering by deduster, and the air outlet of main exhauster of sintering connects sintering machine cigarette
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 branches, a steam branch connection by low-pressure steam pipeline
Desulfurization waste liquor crystallization apparatus heater；Steam jet above another steam branch 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 igniter in the tail air bells cap of machine, head air bells cap and ignition furnace.
3. a kind of coordinated type sinter waste heat according to claim 2 recycles utilization system, which is characterized in that described
Waste-heat recovery device is waste heat boiler.
4. a kind of coordinated type sinter waste heat according to claim 2 recycles utilization system, which is characterized in that described
Flue-gas desulfurizing device of sintering device is wet-type magnesia desulfurizer；The desulfurization waste liquor crystallization apparatus is crystallizing evaporator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710014244.9A CN106595327B (en) | 2017-01-10 | 2017-01-10 | A kind of coordinated type sinter waste heat recycling comprehensive utilization process and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710014244.9A CN106595327B (en) | 2017-01-10 | 2017-01-10 | A kind of coordinated type sinter waste heat recycling comprehensive utilization process and system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106595327A CN106595327A (en) | 2017-04-26 |
| CN106595327B true CN106595327B (en) | 2019-03-19 |
Family
ID=58582906
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710014244.9A Active CN106595327B (en) | 2017-01-10 | 2017-01-10 | A kind of coordinated type sinter waste heat recycling comprehensive utilization process and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106595327B (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101962381B1 (en) * | 2017-08-02 | 2019-03-26 | 주식회사 포스코 | Sintering apparatus and sintering method using the same |
| CN107806770B (en) * | 2017-11-20 | 2024-06-25 | 湖北金盛兰冶金科技有限公司 | Energy-saving sintering system |
| CN108458593A (en) * | 2018-02-11 | 2018-08-28 | 山东钢铁股份有限公司 | A kind of continuous pallettype sintering machine bed of material jet humidifier and air-humidification method |
| CN109055730A (en) * | 2018-09-25 | 2018-12-21 | 湖南华菱湘潭钢铁有限公司 | The method of steel works sintering preheating of mixed material |
| CN109341363A (en) * | 2018-10-09 | 2019-02-15 | 鞍钢股份有限公司 | Method for rapidly increasing temperature of ring-cooling flue gas |
| CN109373768B (en) * | 2018-10-18 | 2020-01-10 | 湖南大学 | Vertical type circulating cooling machine with circulating trolley |
| CN110484716A (en) * | 2019-09-18 | 2019-11-22 | 四川省达州钢铁集团有限责任公司 | A kind of method and device enhancing heat exchange between air and sinter bed |
| CN113091453B (en) * | 2020-01-09 | 2022-03-04 | 中南大学 | Energy-carrying composite gas medium sintering cooperative emission reduction method |
| CN111455167A (en) * | 2020-05-23 | 2020-07-28 | 山东泰山钢铁集团有限公司 | Sintering method for promoting combustion by water spraying for sintering machine |
| CN111928647A (en) * | 2020-08-24 | 2020-11-13 | 张家港宏昌钢板有限公司 | Sintering flue gas circulating device and technological method thereof |
| CN112725615B (en) * | 2020-12-22 | 2021-12-24 | 中冶长天国际工程有限责任公司 | Soaking sintering method based on layered composite heat supply |
| CN112853089B (en) * | 2020-12-31 | 2022-06-24 | 山东莱钢永锋钢铁有限公司 | Method for producing sintered ore from shaft kiln type iron ore powder |
| CN114754592A (en) * | 2022-01-05 | 2022-07-15 | 首钢京唐钢铁联合有限责任公司 | Sintering system and method |
| CN116625119B (en) * | 2023-07-17 | 2023-11-03 | 江苏江成冶金设备制造有限公司 | Energy-saving high-yield sintering machine and control method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102168922A (en) * | 2011-03-11 | 2011-08-31 | 东北大学 | Device and method for efficiently recycling and utilizing waste heat resources in sintering process |
| CN102384664A (en) * | 2011-11-16 | 2012-03-21 | 东北大学 | Sintering and cooling integrated method for efficiently recovering and utilizing waste heat resources and device thereof |
| CN103320605A (en) * | 2013-06-25 | 2013-09-25 | 攀钢集团攀枝花钢钒有限公司 | Sintering method and sintering equipment of iron ore |
| CN204461119U (en) * | 2015-02-10 | 2015-07-08 | 南京凯盛开能环保能源有限公司 | The cement kiln bootstrap system of steam turbine Direct driver rotating machinery |
| CN106225487A (en) * | 2016-08-29 | 2016-12-14 | 大峘集团有限公司 | A kind of vertical cooling of agglomerates of sintered pellets and sintering waste heat utilization system |
| CN206523066U (en) * | 2017-01-10 | 2017-09-26 | 中钢集团鞍山热能研究院有限公司 | A kind of coordinated type sintering deposit waste heat recovery utilization system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012105977B4 (en) * | 2012-07-04 | 2015-11-05 | Thyssenkrupp Industrial Solutions Ag | Process and plant for the production of cement clinker from cement raw meal |
-
2017
- 2017-01-10 CN CN201710014244.9A patent/CN106595327B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102168922A (en) * | 2011-03-11 | 2011-08-31 | 东北大学 | Device and method for efficiently recycling and utilizing waste heat resources in sintering process |
| CN102384664A (en) * | 2011-11-16 | 2012-03-21 | 东北大学 | Sintering and cooling integrated method for efficiently recovering and utilizing waste heat resources and device thereof |
| CN103320605A (en) * | 2013-06-25 | 2013-09-25 | 攀钢集团攀枝花钢钒有限公司 | Sintering method and sintering equipment of iron ore |
| CN204461119U (en) * | 2015-02-10 | 2015-07-08 | 南京凯盛开能环保能源有限公司 | The cement kiln bootstrap system of steam turbine Direct driver rotating machinery |
| CN106225487A (en) * | 2016-08-29 | 2016-12-14 | 大峘集团有限公司 | A kind of vertical cooling of agglomerates of sintered pellets and sintering waste heat utilization system |
| CN206523066U (en) * | 2017-01-10 | 2017-09-26 | 中钢集团鞍山热能研究院有限公司 | A kind of coordinated type sintering deposit waste heat recovery utilization system |
Non-Patent Citations (1)
| Title |
|---|
| 《烧结过程余热资源回收利用技术进步与展望》;董辉等;《钢铁》;20140915;第1-9页 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106595327A (en) | 2017-04-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106595327B (en) | A kind of coordinated type sinter waste heat recycling comprehensive utilization process and system | |
| CN108314336A (en) | A kind of lime kiln device using circulating air | |
| CN104831056B (en) | A kind of preheating of fine chrome mine pelletizing and method of roasting | |
| CN108863114A (en) | A kind of method that the light-burned process waste heat of magnesite recycles | |
| CN109372636A (en) | A kind of three circulation integral coal gasification fuel cell generations and method of zero carbon emission | |
| CN104513501B (en) | The processing method of a kind of carbon black tail gas and carbon black production system | |
| CN103834755A (en) | Pulverized coal preheating technique of blast furnace coal injection system | |
| CN106224972B (en) | The refuse gasification combustion gas and steam turbine combined generating system that high-moisture gas recycles | |
| CN105713629B (en) | A kind of steam thermal coupling pulverized coal pyrolysis method | |
| CN206523066U (en) | A kind of coordinated type sintering deposit waste heat recovery utilization system | |
| CN106122977B (en) | CO2 recovery systems based on refuse gasification combustion gas and steam turbine cogeneration | |
| WO2010075670A1 (en) | Process for producing phosphoric acid in blast furnace and installation for roasting phosphorus sludge and recovering heat | |
| CN105402737B (en) | Stoker fired grate formula rubbish list stove gasification burning boiler system | |
| CN206496338U (en) | A kind of co-generation unit under superhigh temperature super-pressure parameter | |
| CN101760212A (en) | Cooling structure for dry method coke quenching | |
| CN201637269U (en) | Return air energy-saving annular kiln for shale brick production | |
| CN209131421U (en) | A kind of kiln integral structure and the process system using the kiln integral structure | |
| CN106382823A (en) | Coupling energy saving device for multiple products of sintering procedure | |
| CN106610016A (en) | Combined heat and power generation system under super-high temperature and super-high pressure parameters and method thereof | |
| CN114777506A (en) | Delayed coke calcination flue gas treatment and high-temperature needle coke cooling process | |
| CN208234790U (en) | A kind of lime kiln device using circulating air | |
| CN216205368U (en) | Tail gas treatment device of cupola furnace | |
| CN206974134U (en) | A kind of accumulation of heat environment-friendly type down-draft kiln | |
| CN113248113A (en) | Device and method for producing fibers by using coal gangue | |
| CN204125382U (en) | A kind of partition shaft furnace with power generation assembly |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |