CN109331614A - The recovery system and method for Combined cycle gas-steam turbine unit fume afterheat and moisture - Google Patents
The recovery system and method for Combined cycle gas-steam turbine unit fume afterheat and moisture Download PDFInfo
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- CN109331614A CN109331614A CN201811339927.2A CN201811339927A CN109331614A CN 109331614 A CN109331614 A CN 109331614A CN 201811339927 A CN201811339927 A CN 201811339927A CN 109331614 A CN109331614 A CN 109331614A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/22—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion
- B01D53/225—Multiple stage diffusion
- B01D53/226—Multiple stage diffusion in serial connexion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/22—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion
- B01D53/228—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion characterised by specific membranes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/268—Drying gases or vapours by diffusion
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- 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
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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
- F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
- F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
- F01K25/14—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours using industrial or other waste gases
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Abstract
The invention belongs to the technical field of energy saving and environmental protection of thermal power industry, the invention discloses a kind of flue gas moisture and waste-heat recovery devices, including Steam Recovery film group, waste heat boiler, chimney and soot blower, wherein Steam Recovery mould group includes the first membrane module and the second membrane module being arranged in series；Waste heat boiler discharge wet flue gas in membrane module with cooling water membrane contacts, vapor in flue gas is condensed in membrane material hole and is mixed by the pressure difference cross-film of film two sides with condensed water, simultaneously to condensation Water transport latent heat, can in flue gas moisture and heat carry out high efficiente callback.The invention also discloses the recovery system of a kind of gas-steam combined cycle set fume afterheat and moisture, moisture after the recovery can be used for boiler or condenser moisturizing, and moisture and heat recycle in the entire system.It solves in wet flue gas moisture energy recovery process in the prior art, the problem that device is more, process is complicated, recovery efficiency is low, recycle-water quality is not high.
Description
Technical field
The present invention relates to the technical field of energy saving and environmental protection of thermal power industry, and in particular to a kind of gas-steam combined is followed
The recovery system and method for ring unit fume afterheat and moisture.
Background technique
China's freshwater resources total amount is about 28000 billion cubic meters, accounts for the 6% of global water resources, but per capita water resource only accounts for
The 25% of world's per capita water resource, and distribution of water resources is uneven.The study found that the thermoelectricity water consumption in China account for about the whole nation it is industrial
The 45% of water, and water consumption rate of installing is higher by 40% or so than international most advanced level, shortage of water resources has become restriction firepower
One major reason of power generation.
Gas turbine uses natural gas for fuel, and hydrogen/carbon (H/C) of natural gas main component methane makes than being higher than coal
It obtains water vapour content in the flue gas of discharge of gas turbine and is higher than coal unit.Current F grades of Gas Generator Sets of large size and fuel gas-steam join
The ratio that the latent heat of vaporization of vapor accounts for natural gas high calorific power in conjunction Cycle Unit discharge flue gas is up to 10% or so, if not
Be used this part latent heat, and is directly discharged in environment, will cause the huge waste of energy.If by Gas Generator Set cigarette
Moisture and recovery of latent heat in gas utilize, and can not only alleviate power plant's shortage of water resources problem, can also greatly improve system
Efficiency reduces the usage amount of natural gas.
The mainstream technology of vapor and waste heat is condensation method and solution absorption method in recycling coal steam-electric plant smoke at present.Condensation method
The moisture water quality of trapping is poor, in some instances it may even be possible to have strong corrosive；Solution absorption method has regeneration energy consumption height, absorbent corrosivity
The disadvantages of strong and occupation area of equipment is big.
In recent years, membrane method dehumidifying technology has also obtained more and more researchs, and mechanism is the concentration difference using film both ends
And the selective penetrated property of film, it realizes the separation of the on-condensible gases such as vapor and nitrogen, oxygen, then makes water by the way of condensation
Steam liquefaction.Membrane method dehumidifying technology relative to condensation method and solution absorption method there is dehumidification process to be carried out continuously, corrosion-free problem
The advantages that, receive extensive concern both domestic and external.
Chinese patent CN107631290A discloses a kind of flue gas waste heat recovery system absorbed based on film, including gas-fired boiler
Furnace, vacuum diaphragm moisture recover, perineurium heat exchanger, indirect heat exchanger, air heat retrieving apparatus, heating network, chimney.The system is first
By in flue gas vapor and dry flue gas separated by vacuum diaphragm, then to after separation dry flue gas and vapor carry out respectively
The recycling of thermal energy, it is more that there are equipment therefors, the more complicated defect of process flow.
In the prior art, water and heat recycling is carried out to power plant wet flue gas, generally existing device is more, process is complicated,
The problems such as recovery efficiency is low, recycle-water quality is not high.
Summary of the invention
Therefore, the technical problem to be solved in the present invention is that overcoming wet flue gas moisture energy recovery process in the prior art
In, the problem that device is more, process is complicated, recovery efficiency is low, recycle-water quality is not high, to provide a kind of flue gas moisture and remaining
Heat recovery apparatus.
The invention solves another technical problem be to overcome wet flue gas moisture energy regenerating in the prior art to fill
The problem that more, process is complicated, recovery efficiency is low, recycle-water quality is not high is set, to provide a kind of Combined cycle gas-steam turbine
The recovery system of unit fume afterheat and moisture.
For this purpose, the present invention provides a kind of flue gas moisture and waste-heat recovery device, including the first membrane module being arranged in series
With the second membrane module, to the moisture and waste heat in recovered flue gas；
Waste heat boiler is connected, to generate wet flue gas to be processed with first membrane module；
Chimney is connected, to the flue gas after emission treatment with second membrane module；
Soot blower is connected with first membrane module, to carry out ash disposal to first membrane module and the second membrane module.
Further, first membrane module is inorganic ceramic membrane membrane module or hydrophily organic hybrid films membrane module；Institute
Stating the second membrane module is inorganic ceramic membrane membrane module or hydrophily organic hybrid films membrane module.
Further, stating the first membrane module is inorganic ceramic membrane membrane module, and second membrane module is that hydrophily is organic multiple
Close film membrane module.
Further, the inorganic ceramic membrane is prepared using hydro-thermal method or microwave method.
Further, the hydrophilic organic composite membrane is that sulfonated polyether-ether-ketone/polyether sulfone (SPEEK/PES) doughnut is multiple
Close film or sulfonated polyether sulfone/polyether sulfone (SPES/PES) hollow fiber composite membrane.
Further, the soot blower is air duster or steam sootblower.
The present invention also provides the recovery systems of a kind of Combined cycle gas-steam turbine unit fume afterheat and moisture, including institute
The flue gas moisture and recyclable device stated.
Further, the recovery system of the Combined cycle gas-steam turbine unit fume afterheat and moisture further includes steam
Turbine is connect with the waste heat boiler, is delivered to the waste heat pot to drive electrical power generators, and by the high-temperature tail gas of generation
Furnace；
Steam turbine engine is connect with the waste heat boiler, the high-temperature vapour generated to receive the waste heat boiler, and band
Dynamic electrical power generators.
Further, the recovery system of the Combined cycle gas-steam turbine unit fume afterheat and moisture further includes,
Condenser, entrance is connect with the steam turbine engine and the second membrane module respectively, to condense steam turbine engine
The low-temperature steam of discharge and the second membrane module discharge water, outlet respectively with the cooling water inlet of the first membrane module, the second film
The cooling water inlet of component is connected with the supply water inlet of waste heat boiler.
Further, the recovery system of the Combined cycle gas-steam turbine unit fume afterheat and moisture further includes,
Heater, entrance are connected with the outlet of the condenser；
Oxygen-eliminating device, entrance are connected with the water outlet of the outlet of the heater and the first membrane module respectively, export
It is connected with waste heat boiler.
Further, the recovery system of the Combined cycle gas-steam turbine unit fume afterheat and moisture further includes,
Water receiver, entrance are connected with the water outlet of first membrane module, to store the water of the first membrane module discharge.
The present invention also provides the recycling of the recovery system of the Combined cycle gas-steam turbine unit fume afterheat and moisture
Method, comprising: the temperature for the wet flue gas that waste heat boiler is conveyed to the first membrane module is 50-110 DEG C；Wet flue gas passes through the first film group
The water flux of part and the second membrane module is 0.3-0.8Lm-2·h-1, monofilm component pressure drop is 0.2-1.0MPa；First membrane module
Flow velocity with cooling water in the second membrane module is 2.5-25L/h.
Further, the temperature for the wet flue gas that waste heat boiler is conveyed to the first membrane module is 80-110 DEG C；Wet flue gas passes through
The water flux of first membrane module and the second membrane module is 0.4-0.6Lm-2·h-1, monofilm component pressure drop is 0.4-0.8MPa；The
The flow velocity of cooling water is 5-25L/h in one membrane module and the second membrane module.
Technical solution of the present invention has the advantages that
1, flue gas moisture and waste-heat recovery device provided by the invention have the advantages that device is simple, easily operated；Using
Membrane method dehumidifying technology, by being passed through flue gas and cooling water simultaneously into membrane module, recycling while realizing moisture and heat, string
Connection uses two membrane modules, significantly improves the recovery efficiency of moisture and heat.
2, inorganic ceramic membrane membrane module has many advantages, such as good chemical stability, high temperature resistant, corrosion-resistant, and it is higher to can contact temperature
Flue gas, as the first membrane module, and select the lesser ceramic membrane of membrane aperture separation with higher, guarantee recycling
The quality of water；Hydrophily organic film membrane module is in rising trend with the reduction separation of flue-gas temperature, and separation is to temperature
Degree is more sensitive, can be recovered to purer water resource under cryogenic, be made the second membrane module.By being used in series
One membrane module and the second membrane module carry out off-gas recovery, and using inorganic ceramic membrane membrane module as the first membrane module, with hydrophily
Organic hybrid films membrane module has been obviously improved the water quality of recycle-water as the second membrane module.
3, the recovery system of Combined cycle gas-steam turbine unit fume afterheat and moisture provided by the invention can high efficiente callback
Moisture and heat in wet flue gas, from the water recycled in flue gas because quality height can be directly used for the recirculated water in system, recycling
Latent heat can be used to improve the feed temperature of waste heat boiler, realize the circulating and recovering of water and heat, energy saving.
4, Combined cycle gas-steam turbine unit fume afterheat provided by the invention and the recovery method of moisture recovery system, can
It to the moisture and heat realization in wet flue gas while recycling, recovery efficiency is high, and the water quality of recycle-water is high, easy to operate.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is the signal of the Combined cycle gas-steam turbine unit fume afterheat of the embodiment of the present invention and the recovery system of moisture
Figure；
Appended drawing reference:
The first membrane module of 1-, the second membrane module of 2-, 3- waste heat boiler, 4- chimney, 5- soot blower, 6- steam turbine, 7- steam
Vapour turbine, 8- condenser, 9- heater, 10- oxygen-eliminating device, 11- water receiver, the first generator of 12-, the second generator of 13-.
The course of work of flue gas moisture and waste-heat recovery device provided by the invention are as follows: by the condensed water being discharged in condenser
It is passed through by the cooling water inlet of the first membrane module 1 into membrane tube as cooling water, makes to form tiny structure, waste heat boiler in membrane tube
The wet flue gas of 3 discharges is flowed into from the side of the first membrane module 1, and with side contacts outside membrane tube, wet flue gas and cooling water membrane contacts are wet
Vapor in flue gas is condensed into liquid in membrane material hole, and due to the tiny structure for having water to be formed in membrane tube, membrane tube two sides have one
Level pressure is poor, and the liquid thereby pressing aid difference cross-film in membrane material hole enters in membrane tube to be mixed with cooling water, meanwhile, the flue gas of membrane tube two sides
Heat exchange is carried out with cooling water, the cooling water after heating can be used as the make-up water of waste heat boiler 3.Flue gas is from the first membrane module 1
Enter the second membrane module 2 after discharge, with cooling water membrane contacts in the second membrane module 2, flue gas is further by vapor mass transfer
Into cooling water, the cooling water after recycling moisture can be re-used, and the dry flue gas for being unable to envelope transmission is arranged by chimney 4
It puts.The front end of the first membrane module 1 is arranged in soot blower 5, since the first membrane module 1 and the second membrane module 2 are arranged in series, soot blower
5 can safeguard the first membrane module 1 and the second membrane module 2 by soot blowing.
The course of work of the recovery system of Combined cycle gas-steam turbine unit fume afterheat and moisture provided by the invention are as follows:
Steam turbine 6 uses natural gas for fuel, drives the power generation of the first generator 12, and the high-temperature tail gas that steam turbine 6 generates is passed through remaining
Heat boiler 3 generates vapor after water in waste heat boiler 3 is heated, and vapor enters steam turbines 7 and drives the second engine
13 power generations, the vapor that steam turbines 7 is discharged, which enters in condenser 8, to be condensed, and condenser 8 carries out cold using air as cooling medium
But, a part of water of condensed water that condenser 8 is discharged passes sequentially through heater 9 and oxygen-eliminating device 10 as make-up water and is conveyed to waste heat pot
Furnace 3, another part water are passed through the first membrane module 1 and the second membrane module 2 respectively as cooling water；Wet flue gas is discharged in waste heat boiler 3
It is passed through the first membrane module 1, condensation occurs for the vapor in the first membrane module 1 in wet flue gas and cross-film is mixed with cooling water, obtains
To the first membrane module recycle-water, the first membrane module recycle-water is discharged into oxygen-eliminating device 10 through water outlet as waste heat boiler 3
Make-up water, or enter in water receiver 11 stored according to actual needs；The wet flue gas that waste heat boiler 3 is discharged is through the first membrane module
Enter the second membrane module 2 after 1 processing, condensation and cross-film and cooling water occur for the vapor in the second membrane module 2 in wet flue gas
Mixing obtains the second membrane module recycle-water, and the second membrane module recycle-water, which enters to recycle in condenser 8, to be used；Wet flue gas is through second
Dry flue gas is obtained after the processing of membrane module 2, dry flue gas is discharged through chimney 4.
Specific embodiment
There is provided following embodiments is to preferably further understand the present invention, it is not limited to the best embodiment party
Formula is not construed as limiting the contents of the present invention and protection scope, anyone under the inspiration of the present invention or by the present invention and its
The feature of his prior art is combined and any and identical or similar product of the present invention for obtaining, all falls within of the invention
Within protection scope.
Embodiment 1
Certain power plant uses 200MW grade gas-steam combined cycle sets, and steam turbine 6 is using natural gas as fuel, drive the
The power generation of one generator 12, the high-temperature tail gas that steam turbine 6 generates are passed through waste heat boiler 3, produce after the water in waste heat boiler 3 is heated
Unboiled water steam, vapor enter steam turbines 7 drive the second engine 13 power generation, steam turbines 7 be discharged vapor into
Enter and condensed in condenser 8, a part of water of condensed water that condenser 8 is discharged passes sequentially through heater 9 and oxygen-eliminating device 10 as supply
Water is conveyed to waste heat boiler 3, and another part water is passed through the first membrane module 1 and the second membrane module 2 respectively as cooling water；Waste heat pot
It is 80 DEG C that wet flue gas temperature, which is discharged, in furnace 3, by wet flue gas by concatenated first membrane module 1 and the second membrane module 2, to recycle cigarette
Moisture and energy in gas.The waste heat boiler wet flue gas flow velocity for being passed through the first membrane module 1 is 10m/s, and fume side gauge pressure is 2KPa,
Osmotic lateral pressure is 0KPa, and smoke components volume content is as shown in table 1.First membrane module 1 uses the α-Al of average pore size 9nm2O3
Inorganic ceramic membrane membrane module, the second membrane module 2 uses SPEEK/PES hollow fiber composite membrane membrane module, by the first membrane module 1
When, water vapour content is 12.8% in flue gas, water flux 0.42Lm-2·h-1, the flow velocity of per-meate side recirculated water is 2.5L/
H, circulating water temperature increase 2.2 DEG C, and the pH for recycling water quality is 6.6, which can be used for 3 make-up water of waste heat boiler or be delivered to storage
It is stored in hydrophone 11；When by the second membrane module 2, water flux 0.38Lm-2·h-1, the flow velocity of per-meate side recirculated water
For 2.5L/h, circulating water temperature increases 0.5 DEG C, and the pH value for recycling water quality is 7.0, which is passed through in condenser 8 and is recycled
Reuse.After the first membrane module 1 and the second membrane module 2, the rate of recovery of vapor is 63.8%, and energy recovery rate is
12.6%.
1 exhaust-heat boiler flue gas main component of table and its volume content %
| Φ(CO2) | Φ(H2O) | Φ(N2) | Φ(O2) |
| 11.31 | 12.80 | 70.08 | 4.81 |
Embodiment 2
Certain power plant uses 200MW grade gas-steam combined cycle sets, and steam turbine 6 is using natural gas as fuel, drive the
The power generation of one generator 12, the high-temperature tail gas that steam turbine 6 generates are passed through waste heat boiler 3, produce after the water in waste heat boiler 3 is heated
Unboiled water steam, vapor enter steam turbines 7 drive the second engine 13 power generation, steam turbines 7 be discharged vapor into
Enter and condensed in condenser 8, a part of water of condensed water that condenser 8 is discharged passes sequentially through heater 9 and oxygen-eliminating device 10 as supply
Water is conveyed to waste heat boiler 3, and another part water is passed through the first membrane module 1 and the second membrane module 2 respectively as cooling water；Waste heat pot
It is 100 DEG C that wet flue gas temperature, which is discharged, in furnace 3.By wet flue gas by concatenated first membrane module 1 and the second membrane module 2, to recycle
Moisture and energy in flue gas.It is same to be passed through the flow velocity of the waste heat boiler wet flue gas of the first membrane module 1, pressure, component volume content
Embodiment 1.First membrane module 1 and the second membrane module 2 all use organic hybrid films membrane module, and organic hybrid films membrane module is
SPEEK/PES hollow fiber composite membrane membrane module, tunica fibrosa is having a size of outer diameter 1.2mm, internal diameter 0.7mm, length 500mm.By
When the first membrane module 1, water vapour content is 12.8% in flue gas, water flux 0.45Lm-2·h-1, per-meate side recirculated water
Flow velocity is 2.5L/h, and circulating water temperature increases 2.6 DEG C, and the pH value for recycling water quality is 6.5；When by the second membrane module 2, water flux is
0.36L·m-2·h-1, the flow velocity of per-meate side recirculated water is 2.5L/h, and circulating water temperature increases 0.5 DEG C, recycles the pH value of water quality
6.6.After the first membrane module 1 and the second membrane module 2, the rate of recovery that vapor is calculated is 61.7%, energy recovery rate
It is 11.1%.
Embodiment 3
Certain power plant uses 200MW grade gas-steam combined cycle sets, and steam turbine 6 is using natural gas as fuel, drive the
The power generation of one generator 12, the high-temperature tail gas that steam turbine 6 generates are passed through waste heat boiler 3, produce after the water in waste heat boiler 3 is heated
Unboiled water steam, vapor enter steam turbines 7 drive the second engine 13 power generation, steam turbines 7 be discharged vapor into
Enter and condensed in condenser 8, a part of water of condensed water that condenser 8 is discharged passes sequentially through heater 9 and oxygen-eliminating device 10 as supply
Water is conveyed to waste heat boiler 3, and another part water is passed through the first membrane module 1 and the second membrane module 2 respectively as cooling water；Waste heat pot
It is 110 DEG C that wet flue gas temperature, which is discharged, in furnace 3.By wet flue gas by concatenated first membrane module 1 and the second membrane module 2, to recycle
Moisture and energy in flue gas.It is passed through waste heat boiler wet flue gas flow velocity, the pressure, the same reality of component volume content of the first membrane module 1
Apply example 1.First membrane module 1 and the second membrane module 2 all use the α-Al of average pore size 9nm2O3Inorganic ceramic membrane membrane module.By
When the first membrane module 1, water vapour content is 12.8% in flue gas, water flux 0.42Lm-2·h-1, per-meate side recirculated water
Flow velocity is 2.5L/h, and circulating water temperature increases 2.2 DEG C, and the pH value for recycling water quality is 6.5, which can be used for the benefit of waste heat boiler 3
Water supply or be delivered in water receiver 11 is stored；When by the second membrane module 2, water flux 0.32Lm-2·h-1, infiltration
The flow velocity of side recirculated water is 2.5L/h, and circulating water temperature is almost unchanged, and the pH value for recycling water quality is 6.7, which is passed through condensation
Circulating and recovering is carried out in device 8.After the first membrane module 1 and the second membrane module 2, the rate of recovery that vapor is calculated is
57.2%, energy recovery rate 9.9%.
Embodiment 4
Certain power plant uses 200MW grade gas-steam combined cycle sets, and steam turbine 6 is using natural gas as fuel, drive the
The power generation of one generator 12, the high-temperature tail gas that steam turbine 6 generates are passed through waste heat boiler 3, produce after the water in waste heat boiler 3 is heated
Unboiled water steam, vapor enter steam turbines 7 drive the second engine 13 power generation, steam turbines 7 be discharged vapor into
Enter and condensed in condenser 8, a part of water of condensed water that condenser 8 is discharged passes sequentially through heater 9 and oxygen-eliminating device 10 as supply
Water is conveyed to waste heat boiler 3, and another part water is passed through the first membrane module 1 and the second membrane module 2 respectively as cooling water；Waste heat pot
It is 65 DEG C that wet flue gas temperature, which is discharged, in furnace 3.By wet flue gas by concatenated first membrane module 1 and the second membrane module 2, to recycle cigarette
Moisture and energy in gas.It is passed through waste heat boiler wet flue gas flow velocity, the pressure, the same implementation of component volume content of the first membrane module 1
Example 1.First membrane module 1 uses SPEEK/PES hollow fiber composite membrane membrane module, and the second membrane module 2 is using average pore size 9nm's
α-Al2O3Inorganic ceramic membrane membrane module.When by the first membrane module 1, water vapour content is 12.8% in flue gas, and water flux is
0.45L·m-2·h-1, the flow velocity of per-meate side recirculated water is 2.5L/h, and circulating water temperature increases 2.6 DEG C, and the pH value for recycling water quality is
6.5, which can be used for 3 make-up water of waste heat boiler or is delivered in water receiver 11 to be stored；Pass through the second membrane module 2
When, water flux 0.32Lm-2·h-1, the flow velocity of per-meate side recirculated water is 2.5L/h, and circulating water temperature is almost unchanged, recycle-water
The pH value of matter is 6.6, which can be used for 3 make-up water of waste heat boiler or be delivered in water receiver 11 to be stored.Pass through
After one membrane module 1 and the second membrane module 2, the rate of recovery that vapor is calculated is 50.7%, energy recovery rate 10.8%.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or
It changes still within the protection scope of the invention.
Claims (10)
1. a kind of flue gas moisture and waste-heat recovery device, which is characterized in that including,
Steam Recovery film group, including the first membrane module (1) and the second membrane module (2) being arranged in series, in recovered flue gas
Moisture and waste heat；
Waste heat boiler (3) is connected, to generate wet flue gas to be processed with first membrane module (1)；
Chimney (4) is connected, to the flue gas after emission treatment with second membrane module (2)；
Soot blower (5) is connected with first membrane module (1), to first membrane module (1) and the second membrane module (2)
Carry out ash disposal.
2. flue gas moisture according to claim 1 and waste-heat recovery device, which is characterized in that first membrane module (1)
For inorganic ceramic membrane membrane module or hydrophily organic hybrid films membrane module；Second membrane module (2) is inorganic ceramic membrane film group
Part or hydrophily organic hybrid films membrane module.
3. flue gas moisture according to claim 2 and waste-heat recovery device, which is characterized in that first membrane module (1)
For inorganic ceramic membrane membrane module, and second membrane module (2) is hydrophily organic hybrid films membrane module.
4. flue gas moisture according to claim 2 or 3 and waste-heat recovery device, which is characterized in that the inorganic ceramic membrane
It is prepared using hydro-thermal method or microwave method.
5. flue gas moisture according to claim 2 or 3 and waste-heat recovery device, which is characterized in that the hydrophilic organic is multiple
Conjunction film is sulfonated polyether-ether-ketone/Polyethersulfone Hollow Fiber Plasma composite membrane or sulfonated polyether sulfone/Polyethersulfone Hollow Fiber Plasma composite membrane.
6. the recovery system of a kind of Combined cycle gas-steam turbine unit fume afterheat and moisture, which is characterized in that wanted including right
Ask the described in any item flue gas moistures of 1-5 and waste-heat recovery device.
7. the recovery system of Combined cycle gas-steam turbine unit fume afterheat according to claim 6 and moisture, feature
It is, further includes,
Steam turbine (6) is connect with the waste heat boiler (3), to drive electrical power generators, and the high-temperature tail gas of generation is defeated
It send to the waste heat boiler (3)；
Steam turbine engine (7) is connect with the waste heat boiler (3), and the high temperature to receive the waste heat boiler (3) generation steams
Gas, and drive electrical power generators.
8. the recovery system of Combined cycle gas-steam turbine unit fume afterheat according to claim 7 and moisture, feature
It is, further includes,
Condenser (8), entrance is connect with the steam turbine engine (7) and the second membrane module (2) respectively, saturating to condense steam
The low-temperature steam of flat machine (7) discharge and the water of the second membrane module (2) discharge, export the cooling with the first membrane module (1) respectively
Water inlet, the second membrane module (2) cooling water inlet be connected with the supply water inlet of waste heat boiler (3).
9. the recovery system of Combined cycle gas-steam turbine unit fume afterheat according to claim 8 and moisture, feature
It is, further includes,
Heater (9), entrance are connected with the outlet of the condenser (8)；
Oxygen-eliminating device (10), entrance are connected with the water outlet of the outlet of the heater (9) and the first membrane module (1) respectively,
Its outlet is connected with waste heat boiler (3).
10. according to returning for the recovery system of Combined cycle gas-steam turbine unit fume afterheat and moisture described in claim 6-9
Receiving method, it is characterised in that: the temperature for the wet flue gas that waste heat boiler (3) is conveyed to the first membrane module (1) is 50-110 DEG C；Wet cigarette
Gas is 0.3-0.8Lm by the water flux of the first membrane module (1) and the second membrane module (2)-2·h-1, monofilm component pressure drop is
0.2-1.0MPa；The flow velocity of cooling water is 2.5-25L/h in first membrane module (1) and the second membrane module (2).
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