CN105928374A - Sintering multi-heat-source low-temperature afterheat ORC power generation method and system - Google Patents
Sintering multi-heat-source low-temperature afterheat ORC power generation method and system Download PDFInfo
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- CN105928374A CN105928374A CN201610290047.5A CN201610290047A CN105928374A CN 105928374 A CN105928374 A CN 105928374A CN 201610290047 A CN201610290047 A CN 201610290047A CN 105928374 A CN105928374 A CN 105928374A
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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
- 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
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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
- F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
-
- 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
Abstract
The invention proposes a sintering multi-heat-source low-temperature afterheat ORC power generation method and a system. The method comprises the following steps: low-temperature cooling waste gas enters a heating medium heat exchanger, and exchanges heat with a first fluid medium through the heating medium heat exchanger; the first fluid medium enters an evaporator and a preheater after heat exchange for heating an organic working medium in the evaporator and the preheater, and circularly flows back to the heating medium heat exchanger; the heated and evaporated organic working medium enters a turbine generator for expanding to drive the turbine generator to generate electricity; the organic working medium in a steam form enters a regenerator, the organic working medium received by the regenerator in a liquid state from a condenser is heated, and the organic working medium in the steam form is cooled; the cooled organic working medium enters the condenser to condense as the organic working medium in the liquid state; and the organic working medium in the liquid state circularly flows back into the preheater and the evaporator after being heated by the regenerator. The method realizes the power generation utilization of low-temperature afterheat resources, and improves the sintering afterheat recovery rate to the greatest extent.
Description
Technical field
The present invention relates to high efficiency of energy and utilize field, particularly to be a kind of sintering multi-heat source low temperature exhaust heat
ORC (Organic Rankine Cycle, organic working medium rankine cycle) electricity-generating method and system.
Background technology
During the cooling of hot sintering deposit, a large amount of residual heat resources can be produced and transfer to cool down in gas, and along with cooling
During flow process is formed respectively, Low Temperature Thermal waste gas, wherein, except more than 300 DEG C (usually less than 450 DEG C)
Middle temperature waste gas residual heat produces middle pressure steam by waste heat boiler, outside heat supply or generating, and a large amount of low temperature
The waste gas residual heat resource of (less than 300 DEG C) is diffused in air or surrounding enviroment, causes energy waste, ring
The adverse effect such as environment pollution, cost increase.In the long big typical process of flow process iron and steel flow process six, sintering circuit
A large amount of cryogenic waste heat resources are not utilized, cause the residual heat resources response rate minimum, and the most about 22%, it is far below
Industry average level 35%, it is sintering circuit energy-saving field that sintering circuit cryogenic waste heat resource reclaims with utilization
Study for a long period of time focus and concern direction.
Application No. CN201110058524 disclosed in Patent Office of the People's Republic of China " waste heat resources in sintering process is efficient
Reclaim and utilize device and method " in, it is proposed that " classification recovery with the core of cascade utilization technology is: will
One section of cooler front end, be passed through waste heat boiler after two-step cooling waste gas removing dust, the steam of generation is for sending out
Electricity；Three-stage cooling waste gas in the middle part of cooler is returned to ignition furnace and sintering machine table top is respectively used to igniting and helps
Combustion and hot gas sintering；It is used for sinter mixture before sintering flue gas higher for temperature is incorporated into ignition furnace to be dried ".
This patented technology exist two aspect problems: cooler front end high-temp waste gas is used for Steam Recovery generating, in
Portion's middle temperature cooling waste gas with gas saving, does not all meet energy cascade utilization thought, a side for sintering ignition
Cooler front end, face high temperature cooling waste gas (300-430 DEG C of different temperatures distribution) carries out steam-electric power, energy
Source conversion efficiency only 20%, causes energy waste；On the other hand, middle temperature waste gas in the middle part of cooler is utilized
(150-200 DEG C) is sintered igniting, owing to its temperature is low, saves high-grade energy coal gas limited.
Meanwhile, the mode utilizing the 5th section of sub-cooled waste gas to continue cooling the 4th section and the 3rd section there is also deficiency,
Being primarily due to (1) the 5th section of waste gas resistance be significantly increased, power consumption can be substantially increased；(2) the 3rd, 4 are caused
Section inlet flue gas temperature rises, and affects sintering machine cooling effect, affects SINTERING PRODUCTION further.
Application No. CN200910187381 disclosed in Patent Office of the People's Republic of China " residual heat resources in sintering process divides
Level reclaims and the method for cascade utilization and device thereof ", it is proposed that " a kind of metallurgy sintered during residual heat resources
Classification recovery and the method for cascade utilization, be encased in red-hot sintering deposit in the tank body of a vertical closing,
The temperature of sintering deposit is 800 DEG C～950 DEG C；Then it is passed through normal temperature air, air mass flow from this tank base
Ratio with sintering deposit treating capacity, it may be assumed that gas-solid ratio is 2000: 2500Nm3/t, makes red-hot sintering deposit exist
Being fully contacted with air in this tank body and cool down, the sintering deposit after cooling is discharged by tank base, and with burning
The air carrying sintering deposit complete sensible heat after knot ore deposit is fully contacted then is discharged from tank body top, and through dedusting
After be passed through waste heat boiler produce steam, the steam of production is incorporated to steam pipe system or generates electricity ".This patent is built
On the basis of standing in the vertical cooling in novel sintered ore deposit technique, but the vertical cooling of sintering deposit does not the most also have at present
Successful story, thus application implementation is the most difficult.
In sum, existing sintering process all uses ring type or belt cooling technique, for existing sintering machine:
(1) only reclaiming senior middle school's temperature (more than 300 DEG C) waste gas residual heat resource, cryogenic waste heat resource is except part is for heat
Outside wind sintering, more cryogenic waste heat resources are wasted because lacking suitable technology and not being recovered, and organic efficiency is relatively
Low；(2) indivedual local low temperature exhaust heats only consider that domestic hot-water is used for bathing after reclaiming, and due to hot water, user is few,
Limit low temperature exhaust heat to reclaim.Therefore, the waste gas low temperature exhaust heat of sintering cooling at present does not still have rational technique to carry out
Recycle.
Summary of the invention
The technical problem to be solved is to provide a kind of sintering multi-heat source low temperature exhaust heat ORC generating side
Method and system, it is achieved cryogenic waste heat resource gas-to electricity, improve the sintering waste heat response rate to greatest extent.
For solving the problems referred to above, the present invention proposes a kind of sintering multi-heat source low temperature exhaust heat ORC electricity-generating method,
Comprise the following steps:
S1: absorb and have the sub-cooled waste gas of sintering deposit heat to enter to heating-medium heat exchanger, changed by heating agent
Hot device and first fluid medium carry out heat exchange；
S2: the first fluid medium after heating-medium heat exchanger heat exchange, as the thermal source of ORC unit, enters into
In vaporizer and preheater, the organic working medium in vaporizer and preheater is heated, first fluid medium circulation
Flow back into described heating-medium heat exchanger；
S3: the organic working medium after heating evaporation expands in entering turbine generators, thus drives turbine power generation
Machine generating output electric energy；
S4: enter in regenerator in vaporish organic working medium, carrys out condenser by what regenerator received
The organic working medium of liquid state heat, cooled in vaporish organic working medium；
S5: the organic working medium after regenerator cools down enters to condenser and is condensed into organic work of liquid state
Matter, the organic working medium of liquid state is after described regenerator heats, and recycle stream is back to described preheater and institute
State in vaporizer heated.
According to one embodiment of present invention, described first fluid medium recycle stream on the first closed circuit
Dynamic, described first closed circuit includes described heating-medium heat exchanger, vaporizer and preheater；Described first-class
After body medium flows through heating-medium heat exchanger, vaporizer and preheater on described first closed circuit successively, flow back to
To described heating-medium heat exchanger.
According to one embodiment of present invention, described first closed circuit also includes closed cycle pump, described
First fluid medium under the driving of described closed cycle pump at described first closed circuit internal circulation flow.
According to one embodiment of present invention, described organic working medium is in the second closed circuit internal circulation flow, institute
State and on the second closed circuit, include described vaporizer, turbine generators, regenerator, condenser and preheater；
Described organic working medium flow through successively on described second closed circuit preheater, vaporizer, turbine generators,
After the second channel of the first passage of regenerator, condenser and regenerator, flow back into described preheater.
According to one embodiment of present invention, described second closed circuit also includes working medium pump, described organic
Working medium under the driving of described working medium pump at described second closed circuit internal circulation flow.
According to one embodiment of present invention, the second fluid medium in condenser heats through described organic working medium
After, flowing in cooling tower and cool down, the second fluid medium circulation after cooled tower cooler flows back into described cold
Condenser.
The present invention also provides for a kind of sintering multi-heat source low temperature exhaust heat ORC electricity generation system, including:
Heating-medium heat exchanger, is arranged in cooler top, and the absorption receiving the output of described cooler has sintering deposit heat
The sub-cooled waste gas of amount, and sub-cooled waste gas and first fluid medium are carried out heat exchange, after output heat exchange
Sub-cooled waste gas and first fluid medium；
Vaporizer, receives first fluid medium after heating-medium heat exchanger heat exchange, and by first fluid medium and
Organic working medium carries out heat exchange, and the first fluid medium in vaporizer is as the ORC organic work of thermal source heating evaporation
Matter, the first fluid medium after output heat exchange and organic working medium；
Preheater, receives the first fluid medium from vaporizer output, and by first fluid medium and organic work
Matter carries out heat exchange, the first fluid medium after output heat exchange and organic working medium, the first fluid of preheater output
Working medium circulation flows back into described heating-medium heat exchanger, and the organic working medium of preheater output flow in described vaporizer；
Turbine generators, receives the organic working medium after the heating evaporation that described vaporizer exports, described organic
Working medium expands in described turbine generators, thus drives turbine generators generating output electric energy；
Regenerator, receive from described turbine generators export in vaporish organic working medium, simultaneously receive come
The organic working medium of the liquid state of condenser, by the organic working medium heat exchange of vaporish organic working medium and liquid state
Rear output, enters condenser after the cooling of vaporish organic working medium, the organic working medium heating Posterior circle of liquid state
Flow back into described preheater；
Condenser, receives the vaporish organic working medium after regenerator cools down, and by vaporish organic work
Matter is condensed into the organic working medium of described liquid state, exports the organic working medium of described liquid state to described regenerator.
According to one embodiment of present invention, the first passage of described heating-medium heat exchanger, the of described vaporizer
The first passage of one passage and described preheater is interconnected to constitute the first closed circuit successively, and described first
Fluid media (medium) circulates on the first closed circuit.
According to one embodiment of present invention, described first closed circuit also includes closed cycle pump, described
First fluid medium under the driving of described closed cycle pump at described first closed circuit internal circulation flow.
According to one embodiment of present invention, the import department at described closed cycle pump is provided with constant pressure supply water dress
Put, so that the low-pressure steam in described first closed circuit is simultaneously as ORC thermal source, add in vaporizer
Hot organic working medium.
According to one embodiment of present invention, the second channel of described vaporizer, described turbine generators, institute
State the first passage of regenerator, the first passage of described condenser, the second channel of described regenerator and described
The second channel of preheater is interconnected to constitute the second closed circuit successively, and described organic working medium is described
Two closed circuit internal circulation flow.
According to one embodiment of present invention, described second closed circuit also includes working medium pump, described organic
Working medium under the driving of described working medium pump at described second closed circuit internal circulation flow.
According to one embodiment of present invention, the organic working medium in the first passage of condenser is by its second channel
In the heating of second fluid medium after, output second fluid medium cools down in cooling tower, cooled tower cooler
After second fluid medium circulation flow back into described condenser.
After using technique scheme, the present invention has the advantages that utilization sintering compared to existing technology
Low temperature exhaust heat in multi-heat source carries out ORC generating, enters into heating agent after cooling waste gas absorption sintering deposit heat
Heat exchanger heating heating agent (first fluid medium), heating agent is as ORC thermal source, at vaporizer, heater
And circulate between heating-medium heat exchanger, it is able in vaporizer and heater constantly to heat ORC and generates electricity institute
The organic working medium needed, organic working medium circulates in turbine generators, regenerator, condenser, not only may be used
To realize ORC generating, by the heat exchange of condenser, residue thermal source recycling can be made it the most further
With.The present invention uses multi-heat source ORC generation technology to add low-grade energy and utilizes channel, improves and reclaims
Rate；Achieve the maximization of sintering low temperature waste heat yield；Maximized by waste heat recovery efficiency, it is possible to bright
The aobvious sintering circuit energy consumption that reduces, the saving energy, reduces discharge, produces good economic and social benefit.This
Outward, by heating-medium heat exchanger and cooler integrated arrangement recovery waste heat, improve heat exchange efficiency, even increase burning
The knot photothermal recovery in ore deposit.
Accompanying drawing explanation
Fig. 1 is the flow process signal of the sintering multi-heat source low temperature exhaust heat ORC electricity-generating method of one embodiment of the invention
Figure；
Fig. 2 is the structural representation of the sintering multi-heat source low temperature exhaust heat ORC electricity generation system of one embodiment of the invention
Figure.
Description of symbols in figure:
Heating-medium heat exchanger 201；Air-introduced machine-202；Closed cycle water pump-203；Preheater-204；Vaporizer
-205；Working medium pump-206；Condenser-207；Regenerator-208；Turbine generators-209；Organic working medium-210；
Condensate pump-211；Constant pressure water compensation apparatus-301.
Detailed description of the invention
Understandable for enabling the above-mentioned purpose of the present invention, feature and advantage to become apparent from, the most right
The detailed description of the invention of the present invention is described in detail.
Elaborate a lot of detail in the following description so that fully understanding the present invention.But the present invention
Can implement to be much different from alternate manner described here, those skilled in the art can without prejudice to
Doing similar popularization in the case of intension of the present invention, therefore the present invention is not by the following public limit being embodied as
System.
Sintering deposit segmentation in sinter cooler cools down through air, obtains the cooling waste gas of different temperatures, wherein,
The high-temp waste gas part direct loopback sintering machine of 300-450 DEG C, for ignition of sintering process, reduces sintering machine combustion
Material consumes；High temperature cooling waste gas remainder enters waste heat boiler, is used for producing middle pressure steam, after cooling
Cooling waste gas is led back by circulating fan and continues to cool down sintering deposit to sinter cooler.
In the present invention, the sub-cooled waste gas of less than 300 DEG C enters into heating-medium heat exchanger 201, generating unit
Dividing low-pressure steam and first fluid medium (heating agent, such as high-pressure water heating), the cooling waste gas after cooling is permissible
Delivered to sintering machine table top by air-introduced machine 202, for hot gas sintering, reduce sintering machine fuel consumption further,
From source energy-saving and emission-reduction.
Referring to Fig. 2, the sintering multi-heat source low temperature exhaust heat ORC electricity generation system of the present embodiment, including: heating agent
Heat exchanger 201, vaporizer 205, preheater 204, turbine generators 209, regenerator 208 and condenser
207。
In order to reduce radiation loss, improve organic efficiency.Take thermal integrated with production technology as much as possible
Design, thus heating-medium heat exchanger 201 is arranged on sinter cooler top, cooling waste gas absorption sintering deposit heat
It is directly entered heating-medium heat exchanger 201 after amount and heats first fluid medium.By heating-medium heat exchanger 201 integration shape
Become on cooler, form the cooler with low temperature exhaust heat high efficiente callback and compact Layout.Cooler is such as
Central cooler, in fig. 2, cooling waste gas from waste heat boiler out after, enter in central cooler, one
Point sub-cooled waste gas recirculates back in waste heat boiler from central cooler the most afterwards, and sub-cooled waste gas is following
So circulate under the effect of ring blower fan.The sub-cooled waste gas of another part enters into from central cooler the most afterwards
Carrying out heat exchange in heating-medium heat exchanger, the cooling waste gas after heat exchange is delivered to sinter board under the effect of air-introduced machine
Face.The sub-cooled waste gas of remainder goes igniting combustion supporting or hot blast insulation etc. from central cooler the most afterwards.
Heating-medium heat exchanger 201 is arranged in cooler top, and the absorption directly receiving cooler output has sintering deposit
The sub-cooled waste gas of heat, and sub-cooled waste gas and first fluid medium are carried out heat exchange, export heat exchange
After sub-cooled waste gas and first fluid medium.At least there is in heating-medium heat exchanger 201 first passage and
Two passages, first passage is used for circulating first fluid medium, and second channel is used for circulating sub-cooled waste gas,
The interior media of two passages carries out heat exchange in the process of circulation.
Vaporizer 205 receives the first fluid medium after heating-medium heat exchanger 201 heat exchange, and by first fluid
Medium and organic working medium carry out heat exchange, and the first fluid medium in vaporizer 205 is as ORC thermal source (also
It is exactly that the first fluid medium after heating-medium heat exchanger 201 heating is as ORC thermal source) the organic work of heating evaporation
Matter, vaporizer 205 exports the first fluid medium after heat exchange and organic working medium.At least have in vaporizer 205
Having first passage and second channel, first passage is for circulating first fluid medium, and second channel is used for circulating
Organic working medium, the interior media of two passages carries out heat exchange in the process of circulation.In one embodiment, steam
Sending out device 205 and can also have third channel, referring to Fig. 2, third channel is steaming after being passed through rich low-pressure steam
Carry out heat exchange in sending out device 205, catch a cold and become condensation water out, strengthen vaporizer 205 for organic working medium
Heating evaporation effect, in one embodiment, can also arrange condensation water at the condensation water out of third channel
Pump 211, circulates with medium in driving third channel.
Preheater 204 1 aspect receives the first fluid medium from vaporizer 205 output, on the other hand receives
From the organic working medium of regenerator 208 output, and first fluid medium and organic working medium are carried out heat exchange, output
First fluid medium after heat exchange and organic working medium.The first fluid working medium circulation of preheater 204 output flows back to
To heating-medium heat exchanger 201, the organic working medium of preheater 204 output flow in vaporizer 205, preheater 204
With the vaporizer 205 mutual convection current of medium between the two, beneficially heat exchange is more thorough.In preheater 204 extremely
Having first passage and second channel less, first passage is for circulating first fluid medium, and second channel is used for
Circulation organic media, the interior media of two passages carries out heat exchange in the process of circulation, and preheater 204 is permissible
Organic media was first preheated before vaporizer 205 heat exchange.
After the heat exchange of vaporizer 205, organic working medium is evaporated, and turbine generators 209 receives
Organic working medium after the heating evaporation of vaporizer 205 output, organic working medium is swollen in turbine generators 209
Swollen, thus drive turbine generators 209 generating output electric energy.
Enter in regenerator 208 in vaporish organic media after turbine generators 209 decrease temperature and pressure,
Namely regenerator 208 receive from turbine generators 209 output in vaporish organic working medium, return simultaneously
Hot device 208 also receives the organic working medium of the liquid state carrying out condenser 207, and regenerator 208 is by vaporish
Export after the organic working medium heat exchange of organic working medium and liquid state, from regenerator after the cooling of vaporish organic working medium
Export in 208 and enter in condenser 207, after the organic working medium heating of liquid state from regenerator 208
Output recycle stream are back to preheater 204.At least there is in regenerator 208 first passage and second channel,
First passage is used for the organic working medium of flowing steam shape, and second channel is used for circulating the organic working medium of liquid state,
The interior media of two passages carries out heat exchange, the regenerator 208 organic work by liquid state in the process of circulation
Vaporish organic working medium of verifying carries out pre-cooling.
Condenser 207 receives the vaporish organic working medium after regenerator 208 cools down, and by vaporish
Organic working medium is condensed into the organic working medium of liquid state, and the organic working medium of output liquid state is to regenerator 208.Cold
The cold-producing medium of condenser 205 can be provided by outside heating device, thus outside heating device can utilize surplus
Waste heat energy.
The present invention realizes the cold energy recycle of sub-cooled waste gas, on the one hand generates electricity for ORC, another
Delayed heat can be provided that to outside heating device by condenser 207 by aspect, thus is used by residue heat energy
Make its way, it is achieved that the maximization of sintering low temperature waste heat yield.
The first passage of heating-medium heat exchanger 201, the first passage of vaporizer 205 and the first of preheater 204
Passage is interconnected to constitute the first closed circuit successively, and first fluid medium circulates on the first closed circuit
Flowing.Wherein, first fluid medium is heated in heating-medium heat exchanger 201, at vaporizer 205 and preheater
Cool down in 204.
Can also include closed cycle pump 203 on first closed circuit, first fluid medium is at closed cycle pump
At the first closed circuit internal circulation flow under the driving of 203.In fig. 2, closed cycle pump 203 is arranged on
Between preheater 204 and heating-medium heat exchanger 201, but without limitation.
Further, in order to ensure first fluid medium in heating-medium heat exchanger 201 overheated (more than 100
Degree Celsius) but be not vaporized, the import department at closed cycle pump 203 is provided with constant pressure water compensation apparatus 301,
So that the low-pressure steam (richness inputted in the third channel of vaporizer 205 in Fig. 2 in the first closed circuit
Abundant low-pressure steam) simultaneously as ORC thermal source, in vaporizer 205, heat organic working medium.
The second channel of vaporizer 205, turbine generators 209, the first passage of regenerator 208, condensation
The second channel of the first passage of device 207, the second channel of regenerator 208 and preheater 204 is the most mutual
Connection is to constitute the second closed circuit, and organic working medium is at the second closed circuit internal circulation flow.Wherein, organic
Working medium first preheats in preheater 204, then by thermal evaporation in vaporizer 205, at turbine generators
Cool down after carrying out expansion power generation in 209, regenerator 208 carry out pre-cooling, condense in condenser 207,
Return to regenerator 208 carries out pre-cooling to organic working medium afterwards, be then returned to preheater 204 and carry out pre-
Heat.
Can also include working medium pump 206 on second closed circuit, organic working medium is under the driving of working medium pump 206
At the second closed circuit internal circulation flow.
In one embodiment, residue heat energy is heated for cooling tower, it is achieved sintering low temperature waste heat yield
Maximize.Organic working medium in the first passage of condenser 207 is by the second fluid medium in its second channel
After heating, output second fluid medium to cooling tower cools down, the second fluid medium after cooled tower cooler
Recycle stream is back to condenser 207.
First fluid medium reclaims the low temperature exhaust heat in cooling waste gas as heating agent, and first fluid medium such as may be used
To be hot water, conduction oil etc..When using hot water as heating agent, constant pressure water compensation apparatus 301 is set, by operating mode
Thermal source becomes stable energy output, it is simple to later use or heat supply.Need in conjunction with user environment, ORC
Electricity generation system can use air cooling, water-cooled or evaporation cooling.
Referring to Fig. 1, the sintering multi-heat source low temperature exhaust heat ORC electricity-generating method of the present embodiment, including following step
Rapid:
S1: absorb and have the sub-cooled waste gas of sintering deposit heat to enter to heating-medium heat exchanger, changed by heating agent
Hot device and first fluid medium carry out heat exchange；
S2: the first fluid medium after heating-medium heat exchanger heat exchange, as the thermal source of ORC unit, enters into
In vaporizer and preheater, the organic working medium in vaporizer and preheater is heated, first fluid medium circulation
Flow back into described heating-medium heat exchanger；
S3: the organic working medium after heating is expanded to steam in entering turbine generators, thus drives turbine to send out
Electric power generation output electric energy；
S4: enter in regenerator in vaporish organic working medium, carrys out condenser by what regenerator received
The organic working medium of liquid state heat, cooled in vaporish organic working medium；
S5: the organic working medium after regenerator cools down enters to condenser and is condensed into organic work of liquid state
Matter, the organic working medium of liquid state is after described regenerator heats, and recycle stream is back to described preheater and institute
State in vaporizer heated.
Below in conjunction with Fig. 1 and Fig. 2, the sintering multi-heat source low temperature exhaust heat ORC electricity-generating method of the present invention is carried out
Concrete description, but should be in this, as restriction.
It is understood that each step of the sintering multi-heat source low temperature exhaust heat ORC electricity-generating method of the present embodiment
Can circulate continuously, the time of circulation is without limitation.
In step sl, heating-medium heat exchanger 201 receive cooler output absorption have the low of sintering deposit heat
Temperature cooling waste gas, and sub-cooled waste gas and first fluid medium are carried out heat exchange, the low temperature after output heat exchange
Cooling waste gas and first fluid medium.At least there is in heating-medium heat exchanger 201 first passage and second channel,
First passage is used for circulating first fluid medium, and second channel is used for circulating sub-cooled waste gas, two passages
Interior media in the process of circulation, carry out heat exchange.
In step s 2, vaporizer 205 receives the first fluid medium after heating-medium heat exchanger 201 heat exchange,
And first fluid medium and organic working medium are carried out heat exchange, the first fluid medium conduct in vaporizer 205
ORC thermal source (the first fluid medium after namely heating-medium heat exchanger heating is as ORC thermal source) heating is steamed
Sending out and flow through the organic working medium of vaporizer 205, vaporizer 205 exports the first fluid medium after heat exchange and organic
Working medium.At least having first passage and second channel in vaporizer 205, first passage is first-class for circulating
Body medium, second channel is for circulating organic working medium, and the interior media of two passages is carried out in the process of circulation
Heat exchange.In one embodiment, vaporizer 205 can also have third channel, referring to Fig. 2, threeway
Road carries out heat exchange after being passed through rich low-pressure steam in vaporizer 205, catches a cold and becomes condensation water out, strengthens
Vaporizer is for the heating evaporation effect of organic working medium.
In step s3, preheater 204 1 aspect receives the first fluid medium from vaporizer 205 output,
On the other hand receive the organic working medium from regenerator 208 output, and first fluid medium and organic working medium are entered
Row heat exchange, the first fluid medium after output heat exchange and organic working medium.The first fluid of preheater 204 output
Working medium circulation flows back into heating-medium heat exchanger 201, and the organic working medium of preheater 204 output flow to vaporizer 205
In, preheater 204 and the mutual convection current of vaporizer 205 medium between the two, beneficially heat exchange is more thorough.
At least having first passage and second channel in preheater 204, first passage is used for first fluid Jie that circulates
Matter, second channel is for circulating organic media, and the interior media of two passages carries out heat exchange in the process of circulation,
Preheater 204 can first preheat organic media before vaporizer 205 heat exchange.
In step s 4, after the heat exchange of vaporizer 205, organic working medium is evaporated, turbine
Electromotor 209 receives the organic working medium after the heating evaporation of vaporizer 205 output, and organic working medium is at turbine
Expand in electromotor 209, produce driving force, thus drive turbine generators 209 generating output electric energy.
In step s 5, entering in vaporish organic media after turbine generators 209 decrease temperature and pressure
In regenerator 208, namely regenerator 208 receives having in vaporish from turbine generators 209 output
Machine working medium, regenerator 208 also receives the organic working medium of the liquid state carrying out condenser 207, regenerator simultaneously
208 will export after the organic working medium heat exchange of vaporish organic working medium and liquid state, vaporish organic working medium
Export from regenerator 208 after cooling and enter in condenser 207, after the organic working medium heating of liquid state
From regenerator 208, output recycle stream are back to preheater 204.At least have first in regenerator 208 to lead to
Road and second channel, first passage is used for the organic working medium of flowing steam shape, and second channel is for circulating liquid
The organic working medium of shape, the interior media of two passages carries out heat exchange in the process of circulation, and regenerator 208 passes through
The organic working medium of liquid state carries out pre-cooling to vaporish organic working medium.Condenser 207 receives through regenerator
Vaporish organic working medium after 208 coolings, and vaporish organic working medium is condensed into the organic of liquid state
Working medium, the organic working medium of output liquid state is to regenerator 208.The cold-producing medium of condenser 207 can be by outward
Portion's heating device provides, thus outside heating device can utilize residue heat energy.
The present invention realizes the cold energy recycle of sub-cooled waste gas, on the one hand generates electricity for ORC, another
Delayed heat can be provided that to outside heating device by condenser 207 by aspect, thus is used by residue heat energy
Make its way, it is achieved that the maximization of sintering low temperature waste heat yield.
First fluid medium circulates on the first closed circuit, and the first closed circuit includes heating agent heat exchange
Device 201, vaporizer 205 and preheater 204；First fluid medium flows through on the first closed circuit successively
After heating-medium heat exchanger 201, vaporizer 205 and preheater 204, flow back into heating-medium heat exchanger 201, so
Circulation.Wherein, first fluid medium is heated in heating-medium heat exchanger 201, at vaporizer 205 and preheater
Cool down in 204.
Can also include closed cycle pump 203 on first closed circuit, first fluid medium is at closed cycle pump
At the first closed circuit internal circulation flow under the driving of 203.In fig. 2, closed cycle pump 203 is arranged on
Between preheater 204 and heating-medium heat exchanger 201, but without limitation.
Further, in order to ensure first fluid medium in heating-medium heat exchanger 201 overheated (more than 100
Degree Celsius) but be not vaporized, the import department at closed cycle pump 203 is provided with constant pressure water compensation apparatus 301,
So that the low-pressure steam (richness inputted in the third channel of vaporizer 205 in Fig. 2 in the first closed circuit
Abundant low-pressure steam) simultaneously as ORC thermal source, in vaporizer 205, heat organic working medium.
Organic working medium at the second closed circuit internal circulation flow, the second closed circuit includes vaporizer 205,
Turbine generators 209, regenerator 208, condenser 207 and preheater 204；Organic working medium is followed second
Preheater 204, vaporizer 205, turbine generators 209, regenerator 208 is flowed through successively in loop back path
After the second channel of first passage, condenser 207 and regenerator 208, flow back into preheater 204.Wherein,
Organic working medium first preheats in preheater 204, then by thermal evaporation in vaporizer 205, at turbine power generation
Cool down after carrying out expansion power generation in machine 209, regenerator 208 carries out pre-cooling, cold in condenser 207
Solidifying, return to regenerator 208 carries out pre-cooling to organic working medium afterwards, be then returned to preheater 207
Preheat.
Can also include working medium pump 206 on second closed circuit, organic working medium is under the driving of working medium pump 206
At the second closed circuit internal circulation flow.
In one embodiment, residue heat energy is heated for cooling tower, it is achieved sintering low temperature waste heat yield
Maximize.Organic working medium in the first passage of condenser 207 is by the second fluid medium in its second channel
After heating, output second fluid medium to cooling tower cools down, the second fluid medium after cooled tower cooler
Recycle stream is back to condenser 207.
First fluid medium reclaims the low temperature exhaust heat in cooling waste gas as heating agent, and first fluid medium such as may be used
To be hot water, conduction oil etc..When using hot water as heating agent, constant pressure water compensation apparatus 301 is set, by operating mode
Thermal source becomes stable energy output, it is simple to later use or heat supply.Need in conjunction with user environment, ORC
Electricity generation system can use air cooling, water-cooled or evaporation cooling.
Although the present invention is open as above with preferred embodiment, but it is not for limiting claim, any
Those skilled in the art without departing from the spirit and scope of the present invention, can make possible variation and repair
Changing, therefore protection scope of the present invention should be defined in the range of standard with the claims in the present invention.
Claims (13)
1. a sintering multi-heat source low temperature exhaust heat ORC electricity-generating method, it is characterised in that comprise the following steps:
S1: absorb and have the sub-cooled waste gas of sintering deposit heat to enter to heating-medium heat exchanger, changed by heating agent
Hot device and first fluid medium carry out heat exchange；
S2: the first fluid medium after heating-medium heat exchanger heat exchange, as the thermal source of ORC unit, enters into
In vaporizer and preheater, the organic working medium in vaporizer and preheater is heated, first fluid medium circulation
Flow back into described heating-medium heat exchanger；
S3: the organic working medium after heating evaporation expands in entering turbine generators, thus drives turbine power generation
Machine generating output electric energy；
S4: enter in regenerator in vaporish organic working medium, carrys out condenser by what regenerator received
The organic working medium of liquid state heat, cooled in vaporish organic working medium；
S5: the organic working medium after regenerator cools down enters to condenser and is condensed into organic work of liquid state
Matter, the organic working medium of liquid state is after described regenerator heats, and recycle stream is back to described preheater and institute
State in vaporizer heated.
2. sintering multi-heat source low temperature exhaust heat ORC electricity-generating method as claimed in claim 1, it is characterised in that
Described first fluid medium circulates on the first closed circuit, described first closed circuit includes described
Heating-medium heat exchanger, vaporizer and preheater；Described first fluid medium on described first closed circuit successively
After flowing through heating-medium heat exchanger, vaporizer and preheater, flow back into described heating-medium heat exchanger.
3. sintering multi-heat source low temperature exhaust heat ORC electricity-generating method as claimed in claim 2, it is characterised in that
Also including closed cycle pump on described first closed circuit, described first fluid medium is at described closed cycle pump
Driving under at described first closed circuit internal circulation flow.
4. sintering multi-heat source low temperature exhaust heat ORC electricity-generating method as claimed in claim 1, it is characterised in that
Described organic working medium includes described evaporation on the second closed circuit internal circulation flow, described second closed circuit
Device, turbine generators, regenerator, condenser and preheater；Described organic working medium loops back described second
Flow through preheater, vaporizer, turbine generators, the first passage of regenerator, condenser on road successively and return
After the second channel of hot device, flow back into described preheater.
5. sintering multi-heat source low temperature exhaust heat ORC electricity-generating method as claimed in claim 4, it is characterised in that
Also include working medium pump on described second closed circuit, described organic working medium under the driving of described working medium pump in institute
State the second closed circuit internal circulation flow.
6. sintering multi-heat source low temperature exhaust heat ORC electricity-generating method as claimed in claim 1, it is characterised in that
Second fluid medium in condenser, after described organic working medium heats, flows in cooling tower and cools down, through cold
But the second fluid medium circulation after tower cooler flows back into described condenser.
7. a sintering multi-heat source low temperature exhaust heat ORC electricity generation system, it is characterised in that including:
Heating-medium heat exchanger, is arranged in cooler top, and the absorption receiving the output of described cooler has sintering deposit heat
The sub-cooled waste gas of amount, and sub-cooled waste gas and first fluid medium are carried out heat exchange, after output heat exchange
Sub-cooled waste gas and first fluid medium；
Vaporizer, receives first fluid medium after heating-medium heat exchanger heat exchange, and by first fluid medium and
Organic working medium carries out heat exchange, and the first fluid medium in vaporizer is as the ORC organic work of thermal source heating evaporation
Matter, the first fluid medium after output heat exchange and organic working medium；
Preheater, receives the first fluid medium from vaporizer output, and by first fluid medium and organic work
Matter carries out heat exchange, the first fluid medium after output heat exchange and organic working medium, the first fluid of preheater output
Working medium circulation flows back into described heating-medium heat exchanger, and the organic working medium of preheater output flow in described vaporizer；
Turbine generators, receives the organic working medium after the heating evaporation that described vaporizer exports, described organic
Working medium expands in described turbine generators, thus drives turbine generators generating output electric energy；
Regenerator, receive from described turbine generators export in vaporish organic working medium, simultaneously receive come
The organic working medium of the liquid state of condenser, by the organic working medium heat exchange of vaporish organic working medium and liquid state
Rear output, enters condenser after the cooling of vaporish organic working medium, the organic working medium heating Posterior circle of liquid state
Flow back into described preheater；
Condenser, receives the vaporish organic working medium after regenerator cools down, and by vaporish organic work
Matter is condensed into the organic working medium of described liquid state, exports the organic working medium of described liquid state to described regenerator.
8. sintering multi-heat source low temperature exhaust heat ORC electricity generation system as claimed in claim 7, it is characterised in that
The first passage of described heating-medium heat exchanger, the first passage of described vaporizer and the first passage of described preheater
Being interconnected to constitute the first closed circuit successively, described first fluid medium circulates on the first closed circuit
Flowing.
9. sintering multi-heat source low temperature exhaust heat ORC electricity generation system as claimed in claim 8, it is characterised in that
Also including closed cycle pump on described first closed circuit, described first fluid medium is at described closed cycle pump
Driving under at described first closed circuit internal circulation flow.
10. sintering multi-heat source low temperature exhaust heat ORC electricity generation system as claimed in claim 9, it is characterised in that
Import department at described closed cycle pump is provided with constant pressure water compensation apparatus, so that in described first closed circuit
Low-pressure steam, simultaneously as ORC thermal source, heats organic working medium in vaporizer.
11. sinter multi-heat source low temperature exhaust heat ORC electricity generation system as claimed in claim 7, it is characterised in that
The second channel of described vaporizer, described turbine generators, the first passage of described regenerator, described condensation
The second channel of the first passage of device, the second channel of described regenerator and described preheater is interconnected successively
To constitute the second closed circuit, described organic working medium is at described second closed circuit internal circulation flow.
12. sinter multi-heat source low temperature exhaust heat ORC electricity generation system as claimed in claim 11, and its feature exists
In, described second closed circuit also includes working medium pump, described organic working medium is under the driving of described working medium pump
At described second closed circuit internal circulation flow.
13. sinter multi-heat source low temperature exhaust heat ORC electricity generation system as claimed in claim 7, it is characterised in that
After second fluid medium in its second channel is heated by the organic working medium in the first passage of condenser, output
Second fluid medium cools down to cooling tower, and the second fluid medium circulation after cooled tower cooler flows back into institute
State condenser.
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