CN108592642A - Sinter shaft furnace cooling air waste heat depth recycles enclosed generating equipment and method - Google Patents
Sinter shaft furnace cooling air waste heat depth recycles enclosed generating equipment and method Download PDFInfo
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- CN108592642A CN108592642A CN201810284836.7A CN201810284836A CN108592642A CN 108592642 A CN108592642 A CN 108592642A CN 201810284836 A CN201810284836 A CN 201810284836A CN 108592642 A CN108592642 A CN 108592642A
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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
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C13/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
- F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
-
- 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
- F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
-
- 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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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
Sinter shaft furnace cooling air waste heat depth recycles enclosed generating equipment, belongs to cogeneration technology field.The equipment includes sinter cooling segment, Waste Heat Generation part, the Organic Rankine Cycle part based on falling film evaporation and flue gas recirculation part, and flue gas recirculation part is connected to sinter cooling segment, Waste Heat Generation part and Organic Rankine Cycle part and forms closed circuit.The equipment can realize the residual heat resources depth recycling to being discharged in sinter cooling procedure, realize exhaust heat stepped utilization, improve generated energy, reduce equipment from power consumption rate, have energy saving and emission reduction double effects.
Description
Technical field
The present invention relates to sinter shaft furnace cooling air waste heat depth recycling enclosed generating equipment and methods.
Background technology
Steel industry is also high energy-consuming industry as the important foundation industry in national economy.In steel production
Sintering circuit is to be only second to the second largest energy consumption item of steel making working procedure in steel production, account for steel production total energy consumption 9%~
12%, the 19.3% of sintering circuit residual heat resources amount about xanthenes steel residual heat resources total amount, there is very big energy-saving potential.Sintering waste heat
Recycling is the important channel for reducing sintering circuit energy consumption and improving the level of resources utilization.The sinter of sintering machine discharge has to pass through
It could enter subsequent technique after sintering is cooling.Generally use ring cold machine or belt-cooling machine using air as medium the cooling of sinter
Sinter is cooled down, exhaust gas temperature after cooling is between 100~400 DEG C.Some sensible heat exhaust gas are only simply utilized,
Even direct emission, causes the significant wastage of residual heat resources, the dust pollution of environment and thermal pollution.
Currently, to sinter flue gas after cooling, waste heat recovery is carried out, is generally recycled using waste heat boiler, exchanged heat
Flue-gas temperature afterwards drops to 120 DEG C of direct emissions, and 120 DEG C of flue gas is also the residual heat resources for having use value, discharge
It also can cause environmental pollution simultaneously, aggravate the formation of haze weather.Residual heat resources depth is not recycled, is caused remaining
The significant wastage of thermal resource.That there is also energy consumptions is higher for waste heat recovery, heat exchange is insufficient, utilization rate of waste heat is low, cogeneration is set
It is standby it is unstable, pollute the environment.
Invention content
According to an aspect of the invention, there is provided a kind of sinter shaft furnace cooling air waste heat depth recycling enclosed power generation is set
It is standby, it is characterised in that including：
It is vertical cooling furnace, gravitational precipitator, cyclone dust collectors, dump valve, double discard heat boilers, middle pressure drum, low
Pressure drum, falling film evaporator, final stage deduster, air blower, new gas entrance, cooling mine discharger, cooling mine conveying device,
Wherein,
The flue gas of vertical cooling furnace enters waste heat boiler after sequentially entering gravitational precipitator, cyclone separator, enters back into drop
Film evaporator enters back into preheater, enters back into final stage deduster, and the entrance of vertical cooling furnace is then entered through air blower,
Cooling mine discharger and cooling mine conveying device are arranged on the exit of vertical cooling furnace；
The sinter shaft furnace cooling air waste heat depth recycling enclosed generating equipment further comprises：Tonifying Qi condensing-type steamer
Machine, the first generator, the first condenser, condensate pump, main feed pump, low pressure feed water pump, oxygen-eliminating device, the first cooling tower and first
Water circulating pump,
Wherein,
The saturated vapor that middle pressure drum is isolated, which enters in double discard heat boilers, to be overheated, as double discard heat boilers
Main steam,
The main inlet throttle-stop valve of the main steam mouth connection filling condensing turbine of double discard heat boilers,
The saturated vapor that low-pressure drum is isolated becomes the low pressure mistake of discard heat boiler in pairs after double discard heat boiler overheats
A part of low-pressure superheated steam of hot steam, double discard heat boilers enters the filling gate valve of filling condensing turbine,
Filling condensing turbine connects the first generator,
The tail portion steam exhaust outlet of steam turbine is connected to condenser steam inlet,
First condenser and the first cooling tower connected to it and first circulation water pump belong to carries out cooling to steam exhaust
First circulation water section,
The condensation water out of first condenser is connected to the entrance of condensate pump,
The outlet of condensate pump is connected with the entrance of oxygen-eliminating device,
The entrance of oxygen-eliminating device is connected respectively to the entrance of the entrance and low pressure feed water pump of main feed pump,
Low pressure feed water pump is connected to low-pressure drum,
Main feed pump is exported to be connected with the entrance of economizer in double discard hot pots,
The sinter shaft furnace cooling air waste heat depth recycling enclosed generating equipment further comprises：Falling film evaporator, gas
Liquid/gas separator, screw expander, the second generator, the second condenser, the second cooling tower, second circulation water pump, organic working medium are followed
Ring pump, preheater,
Wherein,
Heat-carrying working medium using low-boiling organic working medium as power generation,
Organic working medium, which enters after the pressurization of organic working medium circulating pump in preheater, to be preheated, subsequently into falling film evaporation
Device,
Organic working medium and the low-temperature flue gas of double discard heat boiler discharges are fully exchanged heat in falling film evaporator,
The organic working medium of evaporation enters gas-liquid separator and carries out gas-liquid separation,
The steam of organic working medium after separation enters expansion work in screw expander, makes the second hair of screw expander driving
Electric power generation,
The tail portion steam exhaust of screw expander is in the second condenser by including that the second condenser, the second cooling tower and second follow
Become condensing working medium after the second circulation water section cooling of ring water pump,
It is unevaporated in unevaporated organic working medium liquid and falling film evaporator that condensation working medium, gas-liquid separator separates go out
Organic working medium liquid, which enters after the pressurization of organic working medium circulating pump in preheater, to be preheated, and is entered back into falling film evaporator and is carried out down
One cycle.
According to another aspect of the present invention, a kind of sinter shaft furnace cooling air waste heat depth recycling enclosed power generation is provided
Method, it is characterised in that including：
Make the flue gas of vertical cooling furnace pass through pipeline sequentially enter gravitational precipitator, cyclone separator, double discard heat boilers,
Then falling film evaporator, preheater, final stage deduster enter the entrance of vertical cooling furnace through air blower, then filled by entering the wind
Setting makes low-temperature flue gas be uniformly distributed in vertical cooling furnace,
It is discharged and is conveyed in the cooling mine discharger in the exit of vertical cooling furnace and cooling mine conveying device with being arranged
Cooling mine,
Make the saturated vapor for pressing drum to isolate enter in double discard heat boilers to be overheated, as double discard heat boilers
Main steam,
The steam of double discard heat boilers is transported to filling condensing turbine by the main steam mouth of double discard heat boilers
Main inlet throttle-stop valve,
The saturated vapor that low-pressure drum is isolated is become low-pressure superheated steam after waste heat boiler overheats,
A part for low-pressure superheated steam in double discard heat boilers is entered filling condensing turbine through filling gate valve,
Filling condensing turbine is pushed to do work jointly with main steam and low-pressure superheated steam,
The first electrical power generators are driven with filling condensing turbine,
The tail portion steam exhaust of steam turbine is transported to condenser steam inlet,
With the first circulation water section including the first condenser, the first cooling tower and first circulation water pump to tail portion steam exhaust into
Row cooling,
The condensed water of first condenser is transported to the entrance of condensate pump,
The condensed water in the exit of condensate pump is transported to the entrance of oxygen-eliminating device,
The condensed water in the exit of oxygen-eliminating device is respectively delivered to the entrance of the entrance and low pressure feed water pump of main feed pump,
It is pumped with low pressure feed water and condensed water is transported to low-pressure drum,
Condensed water conveyed with main feed pump the entrance of the economizer in double discard heat boilers,
The sinter shaft furnace cooling air waste heat depth recycling enclosed generating equipment further comprises：Falling film evaporator, gas
Liquid/gas separator, screw expander, the second generator, the second condenser, the second cooling tower, second circulation water pump, organic working medium are followed
Ring pump, preheater,
Wherein,
Heat-carrying working medium using low-boiling organic working medium as power generation,
Make organic working medium after the pressurization of organic working medium circulating pump enter in preheater to be preheated and subsequently enter falling liquid film
Evaporator,
Low-temperature flue gas of the organic working medium with double discard heat boiler discharges in falling film evaporator is set to exchange heat,
So that the organic working medium of the evaporation from falling film evaporator is entered gas-liquid separator and carry out gas-liquid separation,
The steam of the organic working medium after separation is set to enter expansion work in screw expander,
The second electrical power generators are driven with screw expander,
Make the tail portion steam exhaust of screw expander in the second condenser by including the second condenser, the second cooling tower and second
The second circulation cooling water section of water circulating pump composition is cooled down, and condensation working medium is accordingly changed into,
Make not evaporate in the unevaporated organic working medium liquid and falling film evaporator that condensation working medium, gas-liquid separator separates go out
Organic working medium liquid through organic working medium circulating pump pressurization after enter preheater in preheated, enter back into falling film evaporator progress
It recycles next time.
Description of the drawings
Fig. 1 is to recycle enclosed generating equipment according to the sinter shaft furnace cooling air waste heat depth of one embodiment of the present of invention
Configuration diagram.
Reference numeral：
1 vertical cooling furnace, 2 gravitational precipitators, 3 cyclone dust collectors, 4 dump valves,
5 pairs of discard heat boilers, press drum in 6,7 low-pressure drums, 8 oxygen-eliminating devices,
9 filling condensing turbines, 10 first generators, 11 first condensers,
12 first cooling towers, 13 first circulation water pumps, 14 condensate pumps,
15 main feed pumps, 16 low pressure feed waters pump, 17 falling film evaporators,
18 gas-liquid separators, 19 screw expanders, 20 second generators,
21 second condensers, 22 second cooling towers, 23 second circulation water pumps,
24 organic working medium circulating pumps, 25 preheaters, 26 final stage dedusters,
27 air blowers, 28 new gas entrances,
29 cooling mine dischargers, 30 cooling mine conveying devices, 31 air-distribution devices.
Specific implementation mode
In order to solve defect existing for prior art sinter waste heat recovery, the present invention provides a kind of sinter shaft furnace is cold
But gas waste heat depth recycles enclosed generating equipment, which, which can realize, returns the waste heat depth discharged in sinter cooling procedure
It receives, realizes exhaust heat stepped utilization, improve generated energy, reduce equipment from power consumption rate, there are energy saving and emission reduction double effects.
As shown in Figure 1, sinter shaft furnace cooling air waste heat depth recycling enclosed hair according to an embodiment of the invention
Electric equipment includes：Shaft furnace sinter cooling segment, Waste Heat Generation part, Organic Rankine Cycle part and flue gas recirculation portion
Point, wherein：
The sinter cooling segment includes vertical cooling furnace 1, cooling mine discharger 29, cooling mine conveying device
30, the exit of air-distribution device 31, vertical cooling furnace 1 is provided with cooling mine discharge discharger 29, cooling mine conveying device 30；
The Waste Heat Generation part includes double discard heat boilers 5, tonifying Qi condensing turbine 9, the first generator
10, the first condenser 11, condensate pump 14, main feed pump 15, low pressure feed water pump 16, oxygen-eliminating device 8, the first cooling tower 12 and first
Water circulating pump 13, then the saturated vapor that middle pressure drum 6 is isolated, which enters in double discard heat boilers 5, overheat as double discards
The main steam of heat boiler, the main inlet throttle-stop valve of the main steam mouth connection filling condensing turbine 9 of double discard heat boilers 5, low-pressure drum 7
The saturated vapor isolated becomes low-pressure superheated steam after waste heat boiler overheats, and the low area overheat in double discard heat boilers 5 steams
A vapour part enters filling condensing turbine 9 through filling gate valve, and low-pressure steam another part, which is connected in oxygen-eliminating device 8, carries out heat
Power deoxygenation, low-pressure steam and main steam push filling condensing turbine 9 to do work, first hair of the connection of filling condensing turbine 9
Motor 10, filling condensing turbine 9 drive the power generation of the first generator 10, the tail portion steam exhaust outlet of filling condensing turbine 9
It is connected to 11 steam inlet of the first condenser；First condenser 11 and the first cooling tower 12 connected to it and first circulation water
Pump 13 belongs to the first circulation water section of steam exhaust cooling, and the condensation water out of the first condenser 11 is connected to entering for condensate pump 14
Mouthful, the outlet of condensate pump 14 is connected with the entrance of oxygen-eliminating device 8, and the outlet of oxygen-eliminating device 8 is connected respectively to main feed pump 15 and low
The entrance of feed pump 16 is pressed, low pressure feed water pump 16 is connected to low-pressure drum 7, in the outlet of main feed pump 15 and double discard heat boilers
Economizer entrance is connected.
The Organic Rankine Cycle part includes falling film evaporator 17, gas-liquid separator 18, screw expander 19, second
Generator 20, the second condenser 21, the second cooling tower 22, second circulation water pump 23, organic working medium circulating pump 24, preheater 25,
Wherein：Heat-carrying working medium using low-boiling organic working medium as power generation, organic working medium are pressurizeed by organic working medium circulating pump 24
Enter in preheater 25 afterwards and preheated, subsequently into falling film evaporator 17, in falling film evaporator 17 with double discard heat boilers 5
The low-temperature flue gas of discharge is fully exchanged heat, and the organic working medium of evaporation enters gas-liquid separator 18 and carries out gas-liquid separator, separation
Organic steam afterwards enters expansion work in screw expander 19, driving the second generator 20 power generation, the tail of screw expander 19
Portion's steam exhaust is in the second condenser 21 by after the second circulation water section cooling including the second cooling tower 22, second circulation water pump 23
Become condensing working medium, condensation working medium is not evaporated with isolating in gas-liquid separator 18 in liquid organic working medium and falling film evaporator 17
Organic working medium together enter organic working medium circulating pump 24 in pressurize, through organic working medium circulating pump 24 pressurization after enter preheater 25
It is preheated, finally enters and carry out organic working medium cycle next time in falling film evaporator 17.
The flue gas recirculation part includes vertical cooling furnace 1, gravitational precipitator 2, cyclone dust collectors 3, dump valve
4, double discard heat boilers 5, falling film evaporator 17, preheater 25, final stage deduster 26, air blower 27, new gas entrance 28.It is vertical cold
But the flue gas of stove 1 enters waste heat boiler 5 after sequentially entering gravitational precipitator 2, cyclone separator 3 by pipeline, enters back into falling liquid film
Evaporator 17 enters back into preheater 25, enters back into final stage deduster 26, and the cloth of vertical cooling furnace 1 is then entered through air blower 27
31 entrance of wind apparatus completes a flue gas recirculation part.
The cooling furnace cools down sinter using vertical closed cooling furnace, and to solve, seal is poor, it is serious to leak out, changes
The problems such as hot time is short, heat exchange is insufficient.
According to one embodiment of present invention, main steam device is arranged using double discard heat boilers in the waste heat boiler
With low-pressure steam device.
According to one embodiment of present invention, the Organic Rankine Cycle part carries out step to sinter cooling residual heat
It utilizes, realizes and waste heat depth is recycled.
According to one embodiment of present invention, the organic Rankine cycle uses low boiling point organic working medium, such as alkane, fluorine
For low-boiling-point organic compounds such as alkane.
According to one embodiment of present invention, the organic Rankine follows the falling film evaporator changed in part and uses vertical two
The mode of phase adverse current feeding.
According to one embodiment of present invention, the low-pressure steam of the waste heat boiler carries out thermal de-aeration to oxygen-eliminating device.
According to one embodiment of present invention, the flue gas recirculation uses closed circuit, does not discharge pollutants to air,
With environmental-protection function.
According to one embodiment of present invention, the air blower can supplement fresh air as needed, with satisfaction wind need
Summation heat exchange demand.
Advantages of the present invention includes：
(1) to fume afterheat cascade utilization, residual heat generating efficiency improves.Waste heat flue gas is by the double pressure boiler power generations of waste heat
Afterwards, 120 DEG C of exhaust gas temperature, still there is utility value, into falling film evaporator, drive Organic Rankine Cycle, generate electricity, improve
Cogeneration rate.
(2) flue dust realizes " zero-emission ", improves environmental quality.The flue gas of cooling sinter uses totally-enclosed closed cycle,
Flue gas not instead of direct emission after final stage deduster dedusting enters cooling sinter in sinter and follow next time
Ring, and then pollutant emission is considerably reduced, improve environmental quality.
(3) it is equipped with dump valve and new choke relief valve, dump valve reduces cogeneration part to sinter
Cooling segment influence.Dump valve is provided on pipeline after cyclone dust collectors, cogeneration part is broken down
Afterwards, the cooling of sinter is normally carried out, and the cooling segment of sinter is unaffected.New air inlet valve ensure that equipment wind
Demand.
(4) control sections PLC can be used in equipment, ensure various pieces safe and stable operation.PLC can adjust cooling wind temperature
Degree is driven the ratio of the flue gas and new air after Organic Rankine Cycle by adjusting, ensures cooling effect, ensures the temperature of cooling mine
Degree improves generated energy, makes equipment safety stable and high effective operation.
(5) boiler feedwater uses thermal de-aeration, improves to UTILIZATION OF VESIDUAL HEAT IN, reduces deoxygenation expense.
As shown in Figure 1, sinter shaft furnace cooling air waste heat depth recycles enclosed generating equipment, including the cooling of shaft furnace sinter
Partly, Waste Heat Generation part, Organic Rankine Cycle part and flue gas recirculation part；
The sinter cooling segment includes vertical cooling furnace 1, cooling mine discharger 29, cooling mine conveying device
30, the outlet of air-distribution device 31, vertical cooling furnace is connected with cooling mine discharger, cooling mine conveying device；
The Waste Heat Generation part includes double discard heat boilers 5, tonifying Qi condensing turbine 9, the first generator
10, the first condenser 11, condensate pump 14, main feed pump 15, low pressure feed water pump 16, oxygen-eliminating device 8, the first cooling tower 12 and first
Water circulating pump 13, then the saturated vapor that middle pressure drum 6 is isolated, which enters in double discard heat boilers 5, overheat as double discards
The main steam of heat boiler, the main inlet throttle-stop valve of the main steam mouth connection filling condensing turbine 9 of double discard heat boilers 5, low-pressure drum 7
The saturated vapor isolated becomes low-pressure superheated steam after waste heat boiler overheats, and the low area overheat in double discard heat boilers 5 steams
A vapour part enters filling condensing turbine 9 through filling gate valve, and low-pressure steam another part, which is connected in oxygen-eliminating device 8, carries out heat
Power deoxygenation, low-pressure steam and main steam push filling condensing turbine 9 to do work, first hair of the connection of filling condensing turbine 9
Motor 10, filling condensing turbine 9 drive the power generation of the first generator 10, the tail portion steam exhaust outlet of filling condensing turbine 9
Connect 11 steam inlet of the first condenser；First condenser, 11 steam exhaust is by 13 structure of cooling tower 12 connected to it and water circulating pump
The cycle water section cooled down at steam exhaust carries out cooling condensation, and the condensation water out connection condensate pump 14 of the first condenser 11 enters
Mouthful, the outlet of condensate pump 14 is connected with the entrance of oxygen-eliminating device 8, and the entrance of oxygen-eliminating device 8 is separately connected main feed pump 15 and low pressure
The entrance of feed pump 16,16 connection low-pressure drum 7 of low pressure feed water pump, the outlet of main feed pump 15 is connected with economizer entrance.
The Organic Rankine Cycle part includes falling film evaporator 17, gas-liquid separator device 18, screw expander 19,
Two generators 20, the second condenser 21, the second cooling tower 22, second circulation water pump 23, organic working medium circulating pump 24, preheater
25, wherein：Heat-carrying working medium using low-boiling organic working medium as power generation, organic working medium add by organic working medium circulating pump 24
Enter in preheater 25 after pressure and preheated, subsequently into falling film evaporator 17, in falling film evaporator 17 with double discard hot pots
The low-temperature flue gas that stove 5 is discharged fully is exchanged heat, and the organic working medium of evaporation enters gas-liquid separator 18 and carries out gas-liquid separator, point
Organic steam from after enters expansion work in screw expander 19, driving the second generator 20 power generation, screw expansion drive end unit
Become liquid after the cycle water section cooling that steam exhaust forms in the second condenser 21 through the second cooling tower 22, second circulation water pump 23
Body organic working medium, the organic working medium liquid that liquid organic working medium is isolated through organic working medium circulating pump 24 and gas-liquid separator 18 again
Body, 17 unevaporated organic working medium of falling film evaporator liquid through organic working medium circulating pump 24 pressurization after enter preheater 25 carry out
Preheating, the organic working medium after preheating, which enters in falling film evaporator 17, evaporates, and starts new organic working medium cycle.
The flue gas recirculation part, including vertical cooling furnace 1, gravitational precipitator 2, cyclone dust collectors 3, dump valve
4, double discard heat boilers 5, falling film evaporator 17, final stage deduster 26, air blower 27, new gas entrance 28, air-distribution device 31, it is vertical
The exhanst gas outlet of cooling furnace 1 is sequentially entered by pipeline to be entered double discard heat boilers 5 after gravitational precipitator 2, cyclone separator 3 and changes
Heat, subsequently enters falling film evaporator 17 and exchanges heat, and is preheated into preheater 25 to organic working medium, into final stage deduster 26, so
31 entrance of air-distribution device for entering vertical cooling furnace 1 by air blower 27, starts new flue gas recirculation.
Sinter shaft furnace cooling air waste heat depth recycles enclosed generating equipment, includes the following steps：
(1) sinter cooling segment：There is hot mine to convey after breaker is broken from the sinter being discharged in sintering machine
Device is sent into cooling furnace 1, is exchanged heat with recyclegas in cooling furnace, and sinter is cooled down, then by discharge dress
It sets 29 and is discharged to conveying device 30, into next process；
(2) flue gas recirculation part：Recyclegas (flue gas) enters the air-distribution device 31 in cooling furnace 1 after the pressurization of wind turbine 27
To 1 even distributing wind of cooling furnace, the sinter of flue gas and heat exchanges heat, and flue gas becomes high-temperature flue gas after cooling sinter, enters
Dedusting in gravitational precipitator 2 enters dedusting again in cyclone separator 3 after dedusting, obtain clean flue gas and enter double discard hot pots
Stove 5 exchanges heat, and after pushing the power generation of Waste Heat Generation part, low-temperature flue gas enters in falling film evaporator 17 to be changed with organic working medium
Heat pushes the power generation of organic Rankine part, enters in organic working medium preheater 25 from the flue gas being discharged in falling film evaporator, to organic
Working medium is preheated, and subsequently into being dusted in final stage deduster 26, is most entered in vertical cooling furnace 1 through air blower 27 afterwards
Air-distribution device 31 completes flue gas closed cycle；
(3) Waste Heat Generation part：The saturated vapor that middle pressure drum 6 is isolated, which enters in double discard heat boilers 5, to carry out
Then the main steam as double discard heat boilers, the main steam mouth of double discard heat boilers 5 connect filling condensing turbine 9 to overheat
Main inlet throttle-stop valve, the saturated vapor that low-pressure drum 7 is isolated becomes low-pressure superheated steam, double discard hot pots after waste heat boiler overheats
A low-pressure superheated steam part in stove 5 enters filling condensing turbine 9, the connection of low-pressure steam another part through filling gate valve
To thermal de-aeration is carried out in oxygen-eliminating device 8, the main steam and low-pressure steam that double discard heat boilers 5 generate after exchanging heat enter filling condensing
Formula steam turbine 9 pushes filling condensing turbine 9 to do work, and filling condensing turbine 9 pushes the first electrical power generators 10 hair
Electricity, the steam exhaust of 9 tail portion of filling condensing turbine discharge enters in the first condenser 11 becomes cold after cooled circulating water
Condensate, the first cooling tower 12 and first step cooling water circulating pump 13 form cooling water circulation part, and condensed water is into crossing condensate pump
14 enter 8 deoxygenation of oxygen-eliminating device, and the entrance of oxygen-eliminating device 8 is separately connected the entrance of main feed pump 15 and low pressure feed water pump 16, and low pressure is given
Water pump 16 connects low-pressure drum 7, and the outlet of main feed pump 15 is connected with economizer entrance, completes the structure of Waste Heat Generation equipment
At；
(4) Organic Rankine Cycle part：Enter falling film evaporator 17 from the flue gas after the discharge heat exchange of double discard heat boilers 5
In with organic working medium exchange heat, organic working medium evaporate in falling film evaporator 17 becomes organic steam, organic steam enter gas-liquid divide
From unevaporated organic working medium is removed in device 18, organic steam enters the acting of screw expander 19, and screw expander pushes second
Generator 20 generates electricity, and the organic steam for completion of doing work becomes steam exhaust, is condensed into the second condenser 21 cyclic part that is cooled
Organic working medium, the second cooling tower 22 and the second cooling circulating water pump 23 composition cooling cycle part, condensed organic working medium and
Unevaporated organic working medium is through organic working medium circulating pump 24 in 18 liquid organic working medium of gas-liquid separator, falling film evaporator 17
Enter 25 preheating in preheater after pressurization, reenters and start new organic working medium cycle in falling film evaporator 17.
Illustrative description is carried out to the present invention above in conjunction with attached drawing, it is clear that realization of the invention is not by aforesaid way
Limitation, the present invention can have an other embodiment, and the present invention can be implemented and realized with different modes, as long as using this
The various improvement that the methodology and technical solution of invention carry out, or it is not improved that the design of the present invention and technical solution is direct
Applied to other occasions, it is within the scope of the invention.
Claims (10)
1. sinter shaft furnace cooling air waste heat depth recycles enclosed generating equipment, it is characterised in that including：
Vertical cooling furnace (1), gravitational precipitator (2), cyclone dust collectors (3), dump valve (4), double discard heat boilers (5),
Middle pressure drum (6), low-pressure drum (7), falling film evaporator (17), final stage deduster (26), air blower (27), new gas entrance
(28), cooling mine discharger (29), cooling mine conveying device (30),
Wherein,
The flue gas of vertical cooling furnace (1) sequentially enters gravitational precipitator (2), cyclone separator (3) and enters double discard heat boilers afterwards
(5), falling film evaporator (17) is entered back into, preheater (25) is entered back into, final stage deduster (26) is entered back into, then through air blower
(27) enter the entrance of vertical cooling furnace (1),
Cooling mine discharger (29) and cooling mine conveying device (30) are arranged on the exit of vertical cooling furnace (1)；
The sinter shaft furnace cooling air waste heat depth recycling enclosed generating equipment further comprises：Tonifying Qi condensing turbine
(9), the first generator (10), the first condenser (11), condensate pump (14), main feed pump (15), low pressure feed water pump (16), remove
Oxygen device (8), the first cooling tower (12) and first circulation water pump (13),
Wherein,
The saturated vapor that middle pressure drum (6) is isolated, which enters in double discard heat boilers (5), to be overheated, as double discard heat boilers
Main steam,
The main inlet throttle-stop valve of the main steam mouth connection filling condensing turbine (9) of double discard heat boilers (5),
The saturated vapor that low-pressure drum (7) is isolated becomes the low pressure of discard heat boiler (5) in pairs after double discard heat boiler overheats
A part of low-pressure superheated steam of superheated steam, double discard heat boilers (5) enters filling condensing turbine (9),
Filling condensing turbine (9) connects the first generator (10),
The tail portion steam exhaust outlet of steam turbine (9) is connected to condenser (11) steam inlet,
First condenser (11) and the first cooling tower connected to it (12) and first circulation water pump (13) belong to steam exhaust into
The cooling first circulation water section of row,
The condensation water out of first condenser (11) is connected to the entrance of condensate pump (14),
The outlet of condensate pump (14) is connected with the entrance of oxygen-eliminating device (8),
The entrance of oxygen-eliminating device (8) is connected respectively to the entrance of the entrance and low pressure feed water pump (16) of main feed pump (15),
Low pressure feed water pump (16) is connected to low-pressure drum (7),
Main feed pump (15) is exported to be connected with the entrance of (5) economizer in double discard hot pots,
The sinter shaft furnace cooling air waste heat depth recycling enclosed generating equipment further comprises：Falling film evaporator (17), gas
Liquid/gas separator (18), screw expander (19), the second generator (20), the second condenser (21), the second cooling tower (22), second
Water circulating pump (23), organic working medium circulating pump (24), preheater (25),
Wherein,
Organic working medium, which enters after organic working medium circulating pump (24) pressurization in preheater (25), to be preheated, subsequently into falling liquid film
Evaporator (17),
Organic working medium and the low-temperature flue gas of double discard heat boiler (5) discharges are fully exchanged heat in falling film evaporator (17),
The organic working medium of evaporation enters gas-liquid separator (18) and carries out gas-liquid separation,
The steam of organic working medium after separation enters expansion work in screw expander (19), makes screw expander (19) driving the
Two generators (20) generate electricity,
The tail portion steam exhaust of screw expander (19) is in the second condenser (21) by including the second condenser (21), the second cooling tower
(22) and after the cooling of the second circulation water section of second circulation water pump (23) become condensing working medium,
Condensation working medium, gas-liquid separator (18) are isolated and are not evaporated in unevaporated organic working medium liquid and falling film evaporator (17)
Organic working medium liquid through organic working medium circulating pump (24) pressurization after enter preheater (25) in preheated, enter back into falling liquid film steaming
Hair device (17) is recycled next time.
2. sinter shaft furnace cooling air waste heat depth according to claim 1 recycles enclosed generating equipment, it is characterised in that：
The cooling furnace is vertical closed cooling furnace,
Double discard heat boilers include main steam device and low-pressure steam device,
The Organic Rankine Cycle part carries out cascade utilization to sinter cooling residual heat.
3. sinter shaft furnace cooling air waste heat depth according to claim 1 recycles enclosed generating equipment, it is characterised in that：
The organic working medium is the one kind selected from including alkane and fluoric ether.
4. sinter shaft furnace cooling air waste heat depth according to claim 1 recycles enclosed generating equipment, it is characterised in that：
Heat-carrying working medium using low-boiling organic working medium as power generation,
The falling film evaporator uses vertical two phase countercurrent flow surrounding tangential admission mode.
5. sinter shaft furnace cooling residual heat depth according to claim 1 recycles enclosed generating equipment, it is characterised in that：
Another part low-pressure superheated steam of double discard heat boilers (5), which enters, carries out thermal de-aeration in oxygen-eliminating device (8),
The vertical cooling furnace (1), gravitational precipitator (2), cyclone dust collectors (3), dump valve (4), double discard heat boilers
(5), falling film evaporator (17), final stage deduster (26), air blower (27) are included in a closed circuit,
The air blower (27) is used to supplement fresh air by air inlet (28), with satisfaction wind demand and heat exchange demand.
6. sinter shaft furnace cooling air waste heat depth recycles enclosed electricity-generating method, it is characterised in that including：
The flue gas of vertical cooling furnace (1) is set to sequentially enter gravitational precipitator (2), cyclone separator (3), double discards heat by pipeline
Boiler (5), falling film evaporator (17), preheater (25), final stage deduster (26) then enter vertical cooling through air blower (27)
The entrance of stove (1) then makes low-temperature flue gas be uniformly distributed in vertical cooling furnace (1) by air-intake device (31),
It is discharged in the cooling mine discharger (29) in the exit of vertical cooling furnace (1) and cooling mine conveying device (30) with setting
Mine is cooled down with conveying,
Make the saturated vapor for pressing drum (6) to isolate enter in double discard heat boilers (5) to be overheated, as double discard hot pots
The main steam of stove,
The steam of double discard heat boilers (5) is transported to filling condensing-type steamer by the main steam mouth of double discard heat boilers (5)
The main inlet throttle-stop valve of machine (9),
The saturated vapor that low-pressure drum (7) is isolated is become low-pressure superheated steam after waste heat boiler overheats,
A part for low-pressure superheated steam in double discard heat boilers (5) is entered filling condensing turbine through filling gate valve
(9),
Filling condensing turbine (9) is pushed to do work jointly with main steam and low-pressure steam,
The first generator (10) is driven to generate electricity with filling condensing turbine (9),
The tail portion steam exhaust of filling condensing turbine (9) is transported to condenser (11) steam inlet, with including the first condenser
(11), the first circulation water section of the first cooling tower (12) and first circulation water pump (13) cools down tail portion steam exhaust,
The condensed water of first condenser (11) is transported to the entrance of condensate pump (14),
The condensed water in the exit of condensate pump (14) is transported to the entrance of oxygen-eliminating device (8),
The condensed water in the exit of oxygen-eliminating device (8) is respectively delivered to the entrance of main feed pump (15) and low pressure feed water pumps (16)
Entrance,
Condensed water is transported to low-pressure drum (7) with low pressure feed water pump (16),
Condensed water is conveyed with main feed pump (15) entrance of economizer in double discard heat boilers (5), the sinter shaft furnace is cold
But gas waste heat depth recycling enclosed generating equipment further comprises：Falling film evaporator (17), gas-liquid separator (18), screw expansion
Machine (19), the second generator (20), the second condenser (21), the second cooling tower (22), second circulation water pump (23), organic working medium
Circulating pump (24), preheater (25),
Wherein,
Make organic working medium after organic working medium circulating pump (24) pressurization enter in preheater (25) to be preheated and subsequently entered
Falling film evaporator (17),
Low-temperature flue gas of the organic working medium with double discard heat boiler (5) discharges in falling film evaporator (17) is set to exchange heat,
So that the organic working medium of the evaporation from falling film evaporator (17) is entered gas-liquid separator (18) and carry out gas-liquid separation,
The steam of the organic working medium after separation is set to enter expansion work in screw expander (19),
The second generator (20) is driven to generate electricity with screw expander (19),
Keep the tail portion steam exhaust of screw expander (19) interior by including the second condenser (21), the second cooling in the second condenser (21)
The second circulation cooling water section of tower (22) and second circulation water pump (23) composition is cooled down, and condensation working medium is accordingly changed into,
In unevaporated organic working medium liquid and falling film evaporator (17) that condensation working medium, gas-liquid separator (18) are isolated not
The organic working medium liquid of evaporation, which enters after organic working medium circulating pump (24) pressurization in preheater (25), to be preheated, and drop is entered back into
Film evaporator (17) is recycled next time.
7. sinter shaft furnace cooling air waste heat depth according to claim 6 recycles enclosed electricity-generating method, it is characterised in that：
The cooling furnace is vertical closed cooling furnace,
Double discard heat boilers include main steam device and low-pressure steam device,
The Organic Rankine Cycle part carries out cascade utilization to sinter cooling residual heat.
8. sinter shaft furnace cooling air waste heat depth according to claim 6 recycles enclosed electricity-generating method, it is characterised in that：
The organic working medium is the one kind selected from including alkane and fluoric ether.
9. sinter shaft furnace cooling air waste heat depth according to claim 6 recycles enclosed electricity-generating method, it is characterised in that：
Heat-carrying working medium using low-boiling organic working medium as power generation,
The falling film evaporator uses vertical two phase countercurrent flow feeding manner.
10. sinter shaft furnace cooling air waste heat depth according to claim 6 recycles enclosed electricity-generating method, it is characterised in that
Further comprise：
Thermal de-aeration is carried out to oxygen-eliminating device with the low-pressure steam of double discard heat boilers,
Fresh air is supplemented as desired by air inlet with the air blower,
Wherein,
The vertical cooling furnace (1), gravitational precipitator (2), cyclone dust collectors (3), dump valve (4), waste heat boiler (5),
Falling film evaporator (17), final stage deduster (26), air blower (27) are included in a closed circuit.
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| CN109668445A (en) * | 2018-12-31 | 2019-04-23 | 浙能资本控股有限公司 | Vertical sintering waste heat driving water vapour and Organic Rankine Cycle parallel system |
| CN110540205A (en) * | 2019-08-16 | 2019-12-06 | 中信重工机械股份有限公司 | calcium carbide furnace cooling waste heat power generation system |
| CN110593977A (en) * | 2019-08-30 | 2019-12-20 | 珠海格力电器股份有限公司 | Dual-working-medium Rankine cycle waste heat power generation method and system and generator |
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