CN110394032A - A kind of flue gas waste heat recovery system and its horizontal regenerating unit of graphene - Google Patents
A kind of flue gas waste heat recovery system and its horizontal regenerating unit of graphene Download PDFInfo
- Publication number
- CN110394032A CN110394032A CN201910678199.6A CN201910678199A CN110394032A CN 110394032 A CN110394032 A CN 110394032A CN 201910678199 A CN201910678199 A CN 201910678199A CN 110394032 A CN110394032 A CN 110394032A
- Authority
- CN
- China
- Prior art keywords
- heat
- heat exchanger
- absorption plant
- graphene
- solution
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910021389 graphene Inorganic materials 0.000 title claims abstract description 75
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 74
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 70
- 239000003546 flue gas Substances 0.000 title claims abstract description 70
- 230000001172 regenerating effect Effects 0.000 title claims abstract description 69
- 238000011084 recovery Methods 0.000 title claims abstract description 27
- 239000002918 waste heat Substances 0.000 title claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 97
- 238000010521 absorption reaction Methods 0.000 claims abstract description 93
- 238000000605 extraction Methods 0.000 claims abstract description 16
- 239000007921 spray Substances 0.000 claims description 61
- 239000003517 fume Substances 0.000 claims description 23
- 239000007789 gas Substances 0.000 claims description 23
- 239000000463 material Substances 0.000 claims description 18
- 239000007788 liquid Substances 0.000 claims description 17
- 239000000779 smoke Substances 0.000 claims description 17
- 238000005496 tempering Methods 0.000 claims description 11
- 230000008929 regeneration Effects 0.000 claims description 9
- 238000011069 regeneration method Methods 0.000 claims description 9
- 238000001914 filtration Methods 0.000 claims description 8
- 239000010865 sewage Substances 0.000 claims description 8
- 238000009833 condensation Methods 0.000 claims description 6
- 230000005494 condensation Effects 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 4
- 235000019504 cigarettes Nutrition 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 claims description 3
- 230000008676 import Effects 0.000 claims description 2
- 229910001039 duplex stainless steel Inorganic materials 0.000 abstract description 5
- 238000010438 heat treatment Methods 0.000 description 17
- 239000006096 absorbing agent Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 9
- 230000003009 desulfurizing effect Effects 0.000 description 8
- 238000009938 salting Methods 0.000 description 8
- 238000001816 cooling Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 239000010410 layer Substances 0.000 description 6
- 229920006395 saturated elastomer Polymers 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000005086 pumping Methods 0.000 description 5
- 238000012546 transfer Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 238000004064 recycling Methods 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 229910052582 BN Inorganic materials 0.000 description 2
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 150000001447 alkali salts Chemical class 0.000 description 2
- 230000002421 anti-septic effect Effects 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 239000013618 particulate matter Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000007701 flash-distillation Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000006193 liquid solution Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000010445 mica Chemical group 0.000 description 1
- 229910052618 mica group Chemical group 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000012716 precipitator Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000002633 protecting effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- 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
- B01D53/14—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 absorption
- B01D53/1412—Controlling the absorption process
-
- 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
- B01D53/14—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 absorption
- B01D53/1425—Regeneration of liquid absorbents
-
- 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
- B01D53/14—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 absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
-
- 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
- B01D53/263—Drying gases or vapours by absorption
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/06—Flash evaporation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/16—Treatment of water, waste water, or sewage by heating by distillation or evaporation using waste heat from other processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/80—Water
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/65—Employing advanced heat integration, e.g. Pinch technology
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/10—Energy recovery
Abstract
The invention discloses a kind of flue gas waste heat recovery systems.The horizontal regenerating unit of graphene of system setting includes the heat-exchanging tube bundle of shell and setting in the inner, flash tank steam (vapor) outlet, compressor, the air inlet of saturator and heat-exchanging tube bundle is sequentially communicated, absorption plant, 5th heat exchanger, the dilute solution inlet of the horizontal regenerating unit of graphene is connected to flash tank, so that the weak solution from absorption plant and the concentrated solution from flash tank enter the horizontal regenerating unit of graphene after exchanging heat in the 5th heat exchanger, and it exchanges heat with the live steam of secondary steam and/or unit extraction from flash tank, weak solution enters flash tank after heat exchange.The high-termal conductivity of the heat-exchanging tube bundle of containing graphene can lifting device heat exchange property, then promote the heat exchange property of whole system, ultimate depth recycles and the sensible heat of former flue gas and the latent heat of neat stress water vapour is utilized.In addition, the cost of the horizontal regenerating unit of graphene is lower than duplex stainless steel 2205, system cost is reduced.
Description
Technical field
The present invention relates to environmental technology fields, and in particular to a kind of flue gas waste heat recovery system and its horizontal regeneration of graphene
Device.
Background technique
China's majority coal-burning power plant wet fuel gas desulfurizing technology is saturated wet flue gas direct emission, forms visual wet plume.One
Nearby the masses propose related demand, environmentally friendly administrative responsibile institution, the city of drug in some provinces to the improvement of wet plume for a little coal-burning power plants
The mechanisms dispatches such as government, the joint office of prevention and control of air pollution, economy and the information-based committee, it is desirable that coal-burning power plant administers coloured
Plume.It is by arranging flue gas condenser, spray column after desulfurizing tower or in slurries that mainstream, which eliminates wet plume technology, at present
Increasing slurries cooler in recycle slurry liquid pipe makes the cooling of desulfurizing tower exiting flue gas that moisture be precipitated, and heats net cigarette with former fume afterheat
Gas.
Above-mentioned flue gas condensing or flue gas condensing regeneration techniques route, not only can not depth recycling neat stress water vapour it is a large amount of
Latent heat and former obvious heat of smoke, while so that flue gas condensing bleed is needed extraneous refrigerant in order to take away neat stress latent heat, this causes the energy
Greatly waste.A large amount of cooling circulating water is needed in order to take away neat stress latent heat, cold source is that current mainstream technology must face
The problem of.Especially for the area of regulation desulfurizing tower outlet smoke temperature and water capacity, not only winter needs to condense or even summer also needs
Flue gas condensing is wanted, and cooling tower is often oepration at full load when power plant's summer, can not provide effective cold source.If newly-built cooling tower needs
Increase investment, while will cause and waste water is changed with good water, does not have water-saving result；If newly-built induced cooling tower, cost of erection
It is unbearable to power plant with high.
109569200 A of Chinese patent literature CN discloses a kind of smoke processing system of energy-saving and water-saving, by absorbing
Exchanged heat in device using step, can depth recycle and utilizes the original sensible heat of flue gas and the latent heat of neat stress water vapour.The system institute
There is very strong corrosivity with solution, the heat exchanger tube of evaporator need to have simultaneously to be had good corrosion resistance and high thermal conductivity coefficient, is passed
The heat exchanger heat-exchanging tube bundle of system uses metal tube, and qualified material only has titanium, and the market cost of titanium is very high, causes
System cost is very big, increases preliminary investment, affects the economic payback period of the system.
Summary of the invention
Therefore, the technical problem to be solved in the present invention is that the technology path of existing fume afterheat can not deep exploitation original cigarette
A large amount of latent heat of water vapour in the sensible heat and neat stress of gas, while the defect that cost of investment is big, to provide a kind of fume afterheat
Recovery system and its horizontal regenerating unit of graphene.
For this purpose, the technical solution that the application takes is,
A kind of flue gas waste heat recovery system, absorption plant, regenerative system including being sequentially communicated setting, the regenerative system
Further include,
Dilute solution inlet and steam (vapor) outlet is arranged in flash tank, upper part；
Compressor, saturator and the horizontal regenerating unit of graphene, the horizontal regenerating unit of graphene include shell and set
Heat-exchanging tube bundle disposed within, the flash tank steam (vapor) outlet, compressor, saturator and the heat-exchanging tube bundle air inlet successively
Connection, absorption plant, the 5th heat exchanger, the shell are connected to the flash tank, so that from the absorption plant bottom
Weak solution and the concentrated solution from the flash tank enter the horizontal regenerating unit of the graphene after exchanging heat in the 5th heat exchanger,
And exchange heat with the live steam of secondary steam and/or unit extraction from the flash tank steam (vapor) outlet, after heat exchange
Weak solution enters in the flash tank.
Further, the ratio between the diameter of the heat-exchanging tube bundle and the diameter of the housing be 0.5 or more, and less than 1；
The heat-exchanging tube bundle is made in conjunction with high-strength hot conduction mixing material using graphene, and the content of graphene is
50wt%-80wt%；
The heat-exchanging tube bundle is inserted into the ratio between the intracorporal depth of shell and the shell length 0.5 or more, and less than 1.
Further, the heat-exchanging tube bundle is U-shaped, and the open end of U heat exchange beam is located at the hull outside, closed end
Positioned at the enclosure interior.
Further, the heat-exchanging tube bundle is several U-tubes, and the U-tube includes straight pipe and bend loss, the straight tube
The outer surface of section is plane or ripple type curved surface.
Further, the first end socket and the second end socket is respectively set in the both ends of the shell, and it is intracorporal to be not inserted into the shell
It is steam inlet that heat-exchanging tube bundle, which extends to extraneous and one end from the first end socket, and the other end is that steam condensate (SC) exports, described the
Weak solution outlet and the first sewage draining exit are provided on two end sockets；The shell is additionally provided with the second sewage draining exit and dilute solution inlet,
The dilute solution inlet, the 5th heat exchanger and absorption plant bottom are sequentially communicated.
Further, the steam condensate (SC) outlet of the horizontal regenerating unit of the graphene is connected to third heat exchanger, so that
The condensed water generated after high-temperature steam heat exchange enters third heat exchanger and exchanges heat with hot net water or low plus condensed water；
The flash tank steam (vapor) outlet is connected to the 4th heat exchanger, so that secondary steam enters the 4th heat exchanger and hot net water
Heat exchange；
The horizontal regenerating unit of graphene is connected to the 4th heat exchanger, so that the condensed water generated after secondary steam heat exchange
It exchanges heat into the 4th heat exchanger and hot net water or low plus condensed water；
The flash tank, the 5th heat exchanger are sequentially communicated with the 6th heat exchanger, so that the concentrated solution of the flash tank bottom
It exchanges heat in the 5th heat exchanger with weak solution, and continues to cool down by the 6th heat exchanger, be then back to the absorption plant the
It is recycled at the top of one fume treatment area.
Further, the flue gas waste heat recovery system further includes dust-extraction unit, desulfurizer, with absorption plant, regeneration
System is sequentially communicated.
Further, economizer, the 4th heat exchanger are additionally provided between the dust-extraction unit and the desulfurizer
It is connected to, condensed water is exchanged heat in the economizer with the flue gas from the dust-extraction unit, and will change with the economizer
Flue gas after heat is sent into the desulfurizer.
Further, the absorption plant includes,
Reservoir unit is set in the absorption plant, and its inner cavity is divided into the first fume treatment area and the second flue gas
Treatment region, flue gas are suitable for entering second fume treatment area from first fume treatment area by the reservoir unit；
First spray unit in the inner close to the setting of the middle and upper part of the absorption plant, and is located at the reservoir unit
Top, the flash tank concentrated solution outlet, the 5th heat exchanger, the 6th heat exchanger and the first spray unit are sequentially communicated setting, with
Concentrated solution after heat exchange is sprayed by first spray unit on the flue gas of rising；
Second spray unit is set in the absorption plant, close to the reservoir unit and is disposed below, the storage
Liquid unit, First Heat Exchanger and the second spray unit are sequentially communicated setting, are sent into after exchanging heat with the solution after smoke contacts
Second spray unit, then spray on neat stress, with neat stress reverse convection；
Solution filters tempering system, positioned at the lower part of the absorption plant, with the second heat exchanger, second spray unit
It is sequentially communicated, is sent into second spray unit after weak solution is filtered quenched and heat exchange；
Gas inlet is located at the lower part of the absorption plant, and exhanst gas outlet is located at the top of the absorption plant, and flue gas goes out
Mouth is connected to chimney, and first spray unit, reservoir unit and the second spray unit are respectively positioned on gas inlet and exhanst gas outlet
Between；
Demister is set in the absorption plant, and between first spray unit and the exhanst gas outlet.
Further, the First Heat Exchanger, liquid feeding end are connected to the reservoir unit, and outlet end is close to the reservoir
Unit is connected to first fume treatment area, is changed so that the solution in the reservoir unit enters in the First Heat Exchanger
Heat, and the solution after heat exchange is sent into first fume treatment area and smoke contacts；
The lower part of the absorption plant, the second heat exchanger and the second spray unit are sequentially communicated setting, and weak solution is passed through
Second spray unit is sent into after heat exchange；
The First Heat Exchanger, the second heat exchanger, third heat exchanger and the 4th heat exchanger are sequentially communicated, so that heat supply network water
Or low pressure condensation water passes sequentially through the First Heat Exchanger, the second heat exchanger, third heat exchanger and the 4th heat exchanger, and with entrance
Substance in corresponding heat exchanger exchanges heat.
Further, the absorption plant lower part and second heat exchanger or second heat exchanger and the second spray
The first pump of setting between unit；
The absorption plant lower part and solution filtering tempering system or solution filtering tempering system and described the
The second pump of setting between two heat exchangers or second heat exchanger and second spray unit；
The absorption plant lower part and the 5th heat exchanger or the 5th heat exchanger and the horizontal regeneration of the graphene
Third is arranged between device or the horizontal regenerating unit of the graphene and the flash tank to pump；
The flash tank concentrated solution exports and between the 5th heat exchanger or the 5th heat exchanger and the 6th heat exchanger, or
The 4th pump of setting between 6th heat exchanger and the first spray unit；
External 5th pump of 4th heat exchanger.
Technical solution of the present invention has the advantages that
1. flue gas waste heat recovery system provided by the invention, dust-extraction unit, desulfurizer, suction including being sequentially communicated setting
Receiving apparatus, regenerative system, are arranged the horizontal regenerating unit of graphene in regenerative system, the horizontal regenerating unit of graphene include shell and
Heat-exchanging tube bundle in the inner is set, flash tank steam (vapor) outlet, compressor, saturator and heat-exchanging tube bundle air inlet be sequentially communicated,
Absorption plant, the 5th heat exchanger, the horizontal regenerating unit of graphene dilute solution inlet be connected to flash tank so that come self-absorption dress
The weak solution in bottom set portion and the concentrated solution from flash tank enter the horizontal regenerating unit of graphene after exchanging heat in the 5th heat exchanger,
And exchange heat with the live steam of secondary steam and/or unit extraction from flash tank steam (vapor) outlet, it is dilute molten after heat exchange
Liquid enters in the flash tank.Graphene has extraordinary heat-conductive characteristic.The height of the heat-exchanging tube bundle of containing graphene material is led
It is hot with the heat exchange property of lifting device, then to promote the heat exchange property of whole system and reduce energy consumption, finally obtain depth
Recycle and be utilized the effect of the sensible heat of former flue gas and the latent heat of neat stress water vapour.In addition, the horizontal regenerating unit of graphene
Cost is lower than duplex stainless steel 2205 material, reduces the cost of system.
2. heat exchange is made in graphene and high-strength hot conduction mixing material by flue gas waste heat recovery system provided by the invention
Tube bank, and the horizontal regenerating unit of graphene is bonded with shell.Graphene not only has extraordinary heat-conductive characteristic, also has
There is very high intensity, is one of highest material of known strength.Therefore, the heat exchanger tube of containing graphene not only has very
High thermal coefficient (thermal coefficient close to duplex stainless steel 2205 material), also has very high corrosion resistance and wearability
Can, the comprehensive performance of heat exchanger tube is improved, the requirement of system the heat exchanging material high heat-exchanging performance and antiseptic property is met.
3. flue gas waste heat recovery system provided by the invention, when the content of graphene in the used material of heat-exchanging tube bundle is
When 50wt%-80wt%, heat-exchanging tube bundle has optimal intensity, corrosion resistance and thermal conductivity, and it is horizontal to be conducive to raising graphene
The heat exchange property of regenerating unit, to further recycle and the sensible heat of former flue gas and the latent heat of neat stress water vapour is utilized.
4. flue gas waste heat recovery system provided by the invention, when the ratio between the diameter of heat-exchanging tube bundle and diameter of the housing 0.5 with
It is upper and less than 1, and heat-exchanging tube bundle insertion the ratio between the intracorporal depth of shell and shell length 0.5 more than and less than 1 when, carry out self-absorption
Weak solution and high-temperature steam in the device contact area in the horizontal regenerating unit of graphene are bigger, to make the effect of heat exchange more
It is good, be conducive to further recycle former obvious heat of smoke and neat stress vapour latent heat.
5. flue gas waste heat recovery system provided by the invention, heat-exchanging tube bundle is several U-tubes.The design of U heat exchange beam
Path length of the high-temperature steam in the horizontal regenerating unit of graphene is increased, therefore keeps high-temperature steam more complete with weak solution
The contact in face improves the recovery utilization rate to former obvious heat of smoke and neat stress vapour latent heat to improve heat transfer effect.
6. the ripple type outer surface of flue gas waste heat recovery system provided by the invention, the straight pipe of heat-exchanging tube bundle can be improved
Weak solution and high-temperature steam in the absorption plant contact area in the horizontal regenerating unit of graphene, to improve device
Heat transfer effect improves the recovery utilization rate to former obvious heat of smoke and neat stress vapour latent heat.
7. flue gas waste heat recovery system provided by the invention, external 5th pump of the 4th heat exchanger.The setting of 5th pump can be protected
Card flash tank and the 4th heat exchanger work under appropriate vacuum degree, it is ensured that the normal operation of whole system.
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 system diagram of flue gas waste heat recovery system in the embodiment of the present invention 1；
Fig. 2 is the structural schematic diagram of absorption plant in the embodiment of the present invention 1；
Fig. 3 is the structural schematic diagram of regenerative system in the embodiment of the present invention 1；
Fig. 4 is the structural schematic diagram of the horizontal regenerating unit of graphene in the embodiment of the present invention 1；
Appended drawing reference:
1- dust-extraction unit；2- desulfurizer；3- absorption plant；The first spray unit of 3-1-；The second spray unit of 3-2-；3-
3- reservoir unit；3-4- gas inlet；3-5- exhanst gas outlet；3-6- demister；4- economizer；5- first is pumped；6- second is pumped；7-
Solution filters tempering system；8- First Heat Exchanger；The second heat exchanger of 9-；10- third heat exchanger；The 4th heat exchanger of 11-；12-
Three pumps；The 5th heat exchanger of 13-；14- the 4th is pumped；15- compressor；16- saturator；The horizontal regenerating unit of 17- graphene；17-1-
Shell；17-2- heat-exchanging tube bundle；The first sewage draining exit of 17-3-；17-4- dilute solution inlet；The outlet of 17-5- weak solution；17-6- steam
Import；The outlet of 17-7- steam condensate (SC)；The second sewage draining exit of 17-8-；18- flash tank；19- chimney；The 6th heat exchanger of 20-；21-
First end socket；The second end socket of 22-；23- the 5th is pumped.
Specific embodiment
Technical solution of the present invention is clearly and completely described below, it is clear that described embodiment is the present invention
A part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not having
Every other embodiment obtained under the premise of creative work is made, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to
Convenient for description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation,
It is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.In addition, term " first ", " second ",
" third " is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
As long as in addition, the non-structure each other of technical characteristic involved in invention described below different embodiments
It can be combined with each other at conflict.
Embodiment 1
A kind of flue gas waste heat recovery system is present embodiments provided, as shown in Figure 1, including the absorption dress for being sequentially communicated setting
3, regenerative system is set, the regenerative system further includes flash tank 18, and dilute solution inlet and steam (vapor) outlet is arranged in upper part；Compression
Machine 15, saturator 16 and the horizontal regenerating unit 17 of graphene, the horizontal regenerating unit 17 of graphene include shell 17-1 and are set to
Heat-exchanging tube bundle 17-2 in it, the steam (vapor) outlet of flash tank 18, compressor 18, saturator 16 and heat-exchanging tube bundle 17-2 air inlet
Be sequentially communicated, absorption plant 3, the 5th heat exchanger 13, the horizontal regenerating unit of graphene dilute solution inlet 17-5 and flash tank 18
Connection, the weak solution from 3 bottom of absorption plant exchanges heat in the 5th heat exchanger 13 laggard with the concentrated solution from flash tank 18
Enter the horizontal regenerating unit 17 of graphene, when non-heating season occurs heat exchange with the secondary steam from 18 steam (vapor) outlet of flash tank and (supplies
The live steam extracted when warm season with unit exchanges heat), the weak solution after heat exchange enters in flash tank 18.
Flue gas enters from 3 bottom of absorption plant, forms adverse current with the dense saline solution of 3 top spray of absorption plant, absorbs dress
Setting concentrated solution at the top of 3 upper sections, to absorb moisture in flue gas thinning, absorbs the latent heat discharged in moisture process and adds flue gas and salting liquid
Heat is to 55 DEG C -65 DEG C.Salting liquid after heating is drawn by reservoir unit 3-3 enters First Heat Exchanger 8 and hot net water heat exchange (heat
Net water can be warmed 3-10 DEG C), salting liquid be cooled to upper section at the top of solution inlet port temperature it is consistent after enter absorption plant 3 under
Continue to absorb moisture in flue gas in section top.3 lower section bottom weak solution of absorption plant is sent to the second heat exchanger 9 and the 5th respectively and changes
Hot device 13: the hot net water for going out First Heat Exchanger 8 and the weak solution for entering the second heat exchanger 9 exchange heat, and lower section bottom weak solution is dropped
Temperature is consistent to 8 taphole temperature of First Heat Exchanger, and is mixed into 3 lower section of absorption plant with 8 outlet solution of First Heat Exchanger
Top spray, hot net water are heated to 50-60 DEG C；Into the weak solution and the concentrated solution next from regenerative system of the 5th heat exchanger 13
Enter regenerative system after heat exchange.
Weak solution after heating through concentrated solution enters the horizontal regenerating unit 17 of graphene and is continuously heating to 120 DEG C -140
DEG C, it then carries out flash tank 18 and flashes, flash tank 18 can normal pressure or vacuum work.When heating season, exchange heat with weak solution
Heat source comes from pump group steam, and the pumping condensed water obtained after heat exchange enters third heat exchanger 10 and exchanges heat with hot net water, dodges
Hot net water is promoted to 80 DEG C -90 DEG C into the 4th heat exchanger 11 and is used to heat by the secondary steam at 18 top of steaming pot；Non- heating season
The steam for being saturated secondary steam boil down to using compressor 15+ saturator 16+ flash tank 18, with the entrance horizontal regeneration of graphene
The weak solution of device 17 exchanges heat: 18 top secondary steam temperature of flash tank is 95 DEG C -110 DEG C, and (actual temp is by salting liquid
Solution water absorption determines in initial concentration and absorber), secondary steam enters compressor 15 at the top of flash tank 18 and is compressed to 250
DEG C -350 DEG C of superheated steam becomes 130 DEG C -150 DEG C of temperature of saturated vapor by spray saturation, and after weak solution heat exchange
The condensed water arrived enters the 4th heat exchanger 11, hot net water or low plus condensed water is heated to 57 DEG C -70 DEG C, the heat supply network after exchanging heat
Water is sent to low-level (stack-gas) economizer 4, and the condensed water after cooling can be used for desulfurizing tower or absorber demister 3-6 flushing water.By such
The method of operation can make system COP be promoted to 3.The concentrated solution of 18 bottom of flash tank exchanges heat in the 5th heat exchanger 13 with weak solution,
30 DEG C -50 DEG C, which are cooled to, by the 6th heat exchanger 20 again is back to recycling at the top of 3 upper section of absorption plant.
The recycling of heat exchange concentrated solution and the sensible heat of former flue gas and neat stress water vapour are realized in this way
The extraction of latent heat.Graphene has extraordinary heat-conductive characteristic.The high-termal conductivity of the heat-exchanging tube bundle 17-2 of containing graphene material
It with the heat exchange property of lifting device, can then promote the heat exchange property of whole system and reduce energy consumption, it is final to obtain depth recycling
And the effect of the sensible heat of former flue gas and the latent heat of neat stress water vapour is utilized.In addition, the horizontal regenerating unit 17 of graphene is made
Valence is lower than duplex stainless steel 2205 material, reduces the cost of system.
Further, heat-exchanging tube bundle 17-2 is made in conjunction with high-strength hot conduction mixing material using graphene, graphene
Content be 50wt%-80wt%.High-strength hot, which conducts mixing material, to be aluminium oxide ceramics, silicon nitride ceramics, silicon carbide pottery
The mixture that porcelain, hexagonal boron nitride ceramics, cubic boron nitride and mica form.Graphene not only has extraordinary heat conductivity
Can, also there is very high intensity, be one of highest material of known strength.Therefore, the heat exchanger tube 17-2 of containing graphene
Not only have very high thermal coefficient (thermal coefficient close to duplex stainless steel 2205 material), also has very high corrosion-resistant
Property and wear-resisting property, improve the comprehensive performance of heat exchanger tube, meet the system heat exchanging material high heat-exchanging performance and antiseptic property
Requirement.Meanwhile when the content of graphene in the used material of heat-exchanging tube bundle 17-2 is 50wt%-80wt%, heat-exchanging tube bundle
With optimal intensity, corrosion resistance and thermal conductivity, be conducive to the heat exchange property for improving the horizontal regenerating unit 17 of graphene, thus
It further recycles and the sensible heat of former flue gas and the latent heat of neat stress water vapour is utilized.
Further, heat-exchanging tube bundle 17-2 is several U-tubes, and the open end of U heat exchange beam 17-2 is located at shell 17-1
Outside, closed end are located inside shell 17-1；U-tube includes straight pipe and bend loss, and the outer surface of straight pipe is plane or wave
Line type curved surface；The diameter of heat-exchanging tube bundle 17-2 and shell 17-1 diameter ratio are 0.5 or more, and less than 1；Heat-exchanging tube bundle 17-2 is inserted
Enter the intracorporal depth of shell and shell 17-1 length ratio 0.5 or more, and less than 1.
The design of U heat exchange beam 17-2 increases path length of the high-temperature steam in the horizontal regenerating unit 17 of graphene
Degree, therefore contact high-temperature steam more fully with weak solution, to improve heat transfer effect；Heat-exchanging tube bundle 17-2's is straight
Pipeline section is designed as ripple type outer surface, and weak solution and the high-temperature steam contact surface in the horizontal regenerating unit 17 of graphene can be improved
Product, to improve heat transfer effect；When heat-exchanging tube bundle 17-2 diameter and the shell 17-1 diameter ratio 0.5 more than and less than
1, and heat-exchanging tube bundle 17-2 insertion the intracorporal depth of shell and shell 17-1 length ratio 0.5 more than and less than 1 when, weak solution with
High-temperature steam contact area in the horizontal regenerating unit 17 of graphene reaches most preferably, therefore heat transfer effect equally can be improved, most
The recovery utilization rate to former obvious heat of smoke and neat stress vapour latent heat is improved eventually.
Further, it as shown in figure 4, the first end socket 21 and the second end socket 22 is respectively set in the both ends of shell 17-1, does not insert
Entering the heat-exchanging tube bundle 17-2 in shell 17-1 to extend to extraneous and one end from the first end socket 21 is steam inlet 17-6, the other end
17-7 is exported for steam condensate (SC), weak solution outlet 17-5 and the first sewage draining exit 17-3 is provided on the second end socket 22；Shell 17-
1 is additionally provided with the second sewage draining exit 17-8 and dilute solution inlet 17-4, dilute solution inlet 17-4, the 5th heat exchanger 13 and absorption plant
3 bottoms are sequentially communicated.
Further, as shown in figure 3, the steam condensate (SC) of the horizontal regenerating unit 17 of third heat exchanger 10, graphene exports
17-7,18 steam (vapor) outlet of flash tank are sequentially communicated with the 4th heat exchanger 11；18 steam (vapor) outlet of flash tank, compressor 15, saturator
16, the horizontal regenerating unit 17 of graphene is sequentially communicated with the 4th heat exchanger 11；Flash tank 18, the 6th heat exchanger 20 and the 5th heat exchange
Device 13 is sequentially communicated.When heating season, pump group steam and weak solution exchange heat in the horizontal regenerating unit 17 of graphene, heat exchange
The pumping condensed water obtained afterwards enters third heat exchanger 10 and exchanges heat with hot net water, and the secondary steam of flash drum overhead enters the
Hot net water is promoted to 80 DEG C -90 DEG C and is used to heat by four heat exchangers 11；Non- heating season is flashed using compressor 15+ saturator 16+
The steam that secondary steam boil down to is saturated by tank 18 exchanges heat with the weak solution for entering the horizontal regenerating unit 17 of graphene, changes
The secondary steam condensed water obtained after heat enters the 4th heat exchanger 11, and hot net water or low plus condensed water are heated to 57 DEG C -70 DEG C.
The concentrated solution of 18 bottom of flash tank exchanges heat in the 5th heat exchanger 13 with weak solution, then is cooled to 30 by the 6th heat exchanger 20
DEG C -50 DEG C are back at the top of 3 upper section of absorption plant and are recycled.
Further, flue gas waste heat recovery system further includes dust-extraction unit 1, desulfurizer 2, is with absorption plant 3, regeneration
System is sequentially communicated.If dust-extraction unit 1 can be electric precipitator, desulfurizer 2 can be desulfurizing tower, and absorption plant 3 can be absorption tower.
Further, dust-extraction unit 1 and desulfurization fill 2 set between be additionally provided with economizer 4, the 4th heat exchanger 11 and economizer
4 connections, hot net water is exchanged heat in economizer 4 with the flue gas from dust-extraction unit 1, and will be described in the flue gas feeding after heat exchange
In desulfurizer 2.
Further, as shown in Fig. 2, absorption plant 3 includes,
Reservoir unit 3-3, is set in absorption plant 3, and its inner cavity is divided into the first fume treatment area and the second flue gas
Treatment region, flue gas enter the second fume treatment area by reservoir unit 3-3 from the first fume treatment area；
First spray unit 3-1, in the inner close to the setting of the middle and upper part of absorption plant 3, and positioned at the upper of reservoir unit 3-3
Side, the outlet of 18 concentrated solution of flash tank, the 5th heat exchanger 13, the 6th heat exchanger 20 and the first spray unit 3-1 are sequentially communicated setting,
It is sprayed by the first spray unit 3-1 on the flue gas of rising with the concentrated solution after exchanging heat；
Second spray unit 3-2, is set in absorption plant 3, close to reservoir unit 3-3 and is disposed below, reservoir list
First 3-3, First Heat Exchanger 8 and the second spray unit 3-2 are sequentially communicated setting, send after exchanging heat with the solution after smoke contacts
Enter the second spray unit 3-2, then spray on neat stress, with neat stress reverse convection；
Solution filters tempering system 7, positioned at the lower part of absorption plant 3, with the second heat exchanger 9, the second spray unit 3-2 according to
Secondary connection is sent into the second spray unit 3-2 after weak solution is filtered quenched and heat exchange；
Gas inlet 3-4 is located at the lower part of absorption plant 3, and exhanst gas outlet 3-5 is located at the top of absorption plant 3, and flue gas goes out
Mouth 3-5 is connected to chimney 19, and the first spray unit 3-1, reservoir unit 3-3 and the second spray unit 3-2 are respectively positioned on gas inlet
Between 3-4 and exhanst gas outlet 3-5；
Demister 3-6 is set in absorption plant 3, and be located at the first spray unit 3-1 and the exhanst gas outlet 3-5 it
Between.
Reservoir unit 3-3 is set in absorption plant 3, inner cavity is divided into the first fume treatment area and the second flue gas using it
Treatment region, flue gas enter concentrated solution counter current contacting with absorption plant top spray from the bottom of absorption plant, at the second flue gas
The concentrated solution for managing area absorbs the latent heat that moisture in flue gas is thinning, discharges in precipitation moisture phase transition process, heats flue gas and concentrated solution
To 55 DEG C -65 DEG C；Concentrated solution after heating is drawn by reservoir unit 3-3 to be entered in First Heat Exchanger 8 with heat transferring medium (such as heat
Net water) it exchanges heat, heat transferring medium can be warmed 3-10 DEG C, and concentrated solution is cooled to and the second fume treatment area top solution inlet port temperature
Enter the first fume treatment area after substantially uniform, continues to absorb moisture in flue gas.Heat is effectively improved using step heat exchange to change
Quality, the sensible heat of former flue gas and the latent heat of neat stress water vapour are recycled and are utilized eventually by above-mentioned means depth, is avoided
Flue gas cool-down condensation needs a large amount of cold sources, and water resource is greatly saved.Solving coal-burning power plant or other industry elimination simultaneously has
Color plume, depth water pumping system is only put into does not have the problem of income, reaches the environment protectings such as efficient energy-saving and emission-reducing, is had good
Social and economic effect.
In the 3 quenched unit 7 of lower section bottom ancillary filter of absorption plant, on the one hand can be removed by cyclone+filter device
The substances such as the solid particulate matter that solution accumulates in absorption plant and the crystal salt of generation (sulfate, carbonate etc.), make to absorb
The pollutant and Control of Impurities of device solution are to a certain degree；On the other hand alkali salt is added, adjusts the PH of solution, keeps solution
Absorbability, while reducing the corrosivity of solution.Absorbing liquid enters at the top of absorption plant, is filled by uniformly spraying with from absorption
The neat stress reverse convection that bottom set portion enters, water vapour is absorbed by concentrated solution in neat stress, upper section and the respective spraying layer of lower section
Settable spare level, to improve the reliability of absorption plant.
Further, First Heat Exchanger 8, liquid feeding end are connected to reservoir unit 3-3, and outlet end is close to reservoir unit 3-3
It is connected to the first fume treatment area, so that the solution in reservoir unit 3-3 enters heat exchange in First Heat Exchanger 8, and will be after heat exchange
Solution be sent into the first fume treatment area and smoke contacts；The lower part of absorption plant 3, the second heat exchanger 9 and the second spray unit
3-2 is sequentially communicated setting, and weak solution is sent into the second spray unit 3-2 after exchanging heat；First Heat Exchanger 8, second are changed
Hot device 9, third heat exchanger 10 and the 4th heat exchanger 11 are sequentially communicated, so that heat supply network water or low pressure condensation water pass sequentially through first
Heat exchanger 8, the second heat exchanger 9, third heat exchanger 10 and the 4th heat exchanger 11, and carried out to the substance entered in corresponding heat exchanger
Heat exchange.The hot net water (hot net water can be warmed 3-10 DEG C) of heat supply network first-class heat exchanger is changed with the weak solution for entering secondary heat exchanger out
Hot (hot net water is heated to 50-60 DEG C) then goes out the hot net water of heat supply network secondary heat exchanger and enters the pumping of three-level heat exchanger
Condensed water heat exchange, then goes out the hot net water of heat supply network three-level heat exchanger and the secondary steam or secondary steam for entering level Four heat exchanger are cold
Condensate exchanges heat (hot net water is heated to 57 DEG C -90 DEG C).By with four times of hot net water or low pressure condensation water heat exchange, hot net water or
The temperature of low pressure condensation water gradually increases, i.e., the sensible heat of former flue gas and the latent heat of neat stress water vapour gradually by depth extraction and return
It receives.
Further, 3 lower part of absorption plant and the second heat exchanger 9 or the second heat exchanger 9 and the second spray unit 3-2 it
Between setting first pump 5；3 lower part of absorption plant and solution filtering tempering system 7 or solution filtering tempering system 7 and the second heat exchange
The second pump 6 of setting between device 9 or the second heat exchanger 9 and the second spray unit 3-2；3 lower part of absorption plant and the 5th heat exchanger
13 or the 5th heat exchanger 13 between the horizontal regenerating unit 17 of graphene or the horizontal regenerating unit 17 of graphene and flash tank 18
Third is set and pumps 12；The outlet of 18 concentrated solution of flash tank and the 5th heat exchanger 13 or the 5th heat exchanger 13 and the 6th heat exchanger 20 it
Between or the 6th heat exchanger 20 and the first spray unit 3-1 between setting the 4th pump 14；4th heat exchanger 11 external
Five pumps 23.The normal work absolute pressure range of the horizontal regenerating unit 17 of graphene is 20KPa to normal pressure, the work pressure of flash tank
It is by force vacuum state and normal pressure.5th pump can guarantee the pressure of flash tank and the horizontal regenerating unit of graphene, make it appropriate
It works under pressure, it is ensured that the normal operation of whole system.
In addition, the specific working principle of above-mentioned apparatus is as follows:
As shown in Figs. 1-2, arrange that absorption plant, flue gas enter from absorption plant bottom and absorb dress after desulfurizer
The dense saline solution adverse current of top spray is set, moisture is thinning in dense saline solution absorption flue gas at the top of absorption plant upper section, and moisture is precipitated
Latent heat is discharged in phase transition process, heats flue gas and salting liquid, heats flue gas and salting liquid to 55 DEG C -65 DEG C.Solution after heating
It is drawn by upper section bottom liquid dish and enters First Heat Exchanger (heat supply network first-class heat exchanger) and hot net water heat exchange, hot net water can be risen
Warm 3-10 DEG C, salting liquid is cooled to consistent with solution inlet port temperature at the top of upper section later into absorption plant lower section top, continuation
Moisture in flue gas is absorbed, absorption plant lower section bottom weak solution is sent to the second heat exchanger by the first pump (dilute salting liquid pump) respectively
(heat supply network secondary heat exchanger) and the 5th heat exchanger (dilute concentrated solution heat exchanger), the out heat of First Heat Exchanger (heat supply network first-class heat exchanger)
Net water and the weak solution for entering the second heat exchanger (heat supply network secondary heat exchanger) exchange heat, and lower section bottom weak solution is cooled to first and is changed
Hot device taphole temperature is consistent, and is mixed under absorption plant with First Heat Exchanger (heat supply network first-class heat exchanger) outlet solution
Section top spray, hot net water are heated to 50-60 DEG C；Into the weak solution of the 5th heat exchanger (dilute concentrated solution heat exchanger) and from again
Enter regenerative system after the concentrated solution heat exchange that raw system is come.
Weak solution after heating through concentrated solution enters the horizontal regenerating unit of graphene and is continuously heating to 120 DEG C -140 DEG C,
Then flash tank flash distillation is carried out, flash tank can normal pressure or vacuum work.When heating season, come from the heat source that weak solution exchanges heat
Pump group steam, the pumping condensed water obtained after heat exchange enter third heat exchanger (heat supply network three-level heat exchanger) and are changed with hot net water
Heat, the secondary steam of flash drum overhead enter the 4th heat exchanger (heat supply network level Four heat exchanger) and hot net water are promoted to 80 DEG C -90 DEG C
For heating；Non- heating season utilizes compressor+saturator+flash column steam for being saturated secondary steam boil down to, and enters stone
The weak solution of the black horizontal regenerating unit of alkene exchanges heat: secondary steam temperature is 95 DEG C -110 DEG C at the top of flash vessel, by salt used
Solution concentration and water absorption determine that secondary steam is steamed from the overheat that flash drum overhead enters compressor compresses to 250 DEG C -350 DEG C
Vapour becomes 130 DEG C -150 DEG C of temperature of saturated vapor by spray saturation, and the is entered with the condensed water obtained after weak solution heat exchange
Hot net water or low plus condensed water are heated to 57 DEG C -70 DEG C, or it are saved coal with low temperature by four heat exchangers (heat supply network level Four heat exchanger)
Device series connection, its temperature is continued to lift up to 65 DEG C -85 DEG C.Condensed water after cooling can be used for desulfurizer mist eliminator flushing water etc..
System COP can be made to be promoted to 3 by such method of operation.The concentrated solution of flash tank bottom in the 5th heat exchanger, (change by dilute concentrated solution
Hot device) in weak solution exchange heat, then by the 6th heat exchanger (concentrated solution heat exchanger) be cooled to 30 DEG C -50 DEG C be back to absorption dress
It sets and is recycled at the top of upper section.Original system desulfurizer does not do any transformation, and desulphurization system includes that single column Two-way Cycle and double tower are double
The circulatory system.
Specifically, as shown in figure 3, the horizontal regenerating unit of graphene includes shell and heat-exchanging tube bundle, high-temperature steam is from heat exchange
The steam inlet of tube bank top enters, and weak solution is filled with from the dilute solution inlet of air inlet channel under heat exchange tube bundle, and being filled with height is shell
The 3/5-4/5 of height；After high-temperature steam and weak solution are exchanged heat, weak solution is heated to 100 DEG C -160 DEG C, and changes from being not inserted into
Weak solution above the shell of heat pipe bundle exports discharge, into flash tank；And become condensed water after high-temperature steam heat exchange, from shell
Steam condensate (SC) outlet outflow below body.
Specifically, as shown in figure 4, steam condensate (SC) outlet and the third heat exchanger (heat supply network of the horizontal regenerating unit of graphene
Three-level heat exchanger) connection, so that the condensed water generated after high-temperature steam heat exchange enters third heat exchanger (heat supply network three-level heat exchanger)
It exchanges heat with hot net water or low plus condensed water；Flash tank steam (vapor) outlet is connected to the 4th heat exchanger (heat supply network level Four heat exchanger),
So that secondary steam enters the 4th heat exchanger (heat supply network level Four heat exchanger) and hot net water exchanges heat；Hot net water or low plus condensed water are promoted
It can be used for heating to 85 DEG C.
Specifically, as shown in figure 4, the flash tank steam (vapor) outlet, compressor, saturator, the horizontal regenerating unit of graphene
It is sequentially communicated with the 4th heat exchanger (heat supply network level Four heat exchanger), secondary steam at the top of flash vessel is changed into high temperature saturation and is steamed
Vapour, and enter in the horizontal regenerating unit of the graphene and exchange heat with weak solution, obtained secondary steam condensed water enters the
Four heat exchangers (heat supply network level Four heat exchanger) exchange heat with hot net water or low plus condensed water；
Specifically, absorber arrangement is similar with traditional desulfurizing tower after desulfurizing tower, can be void tower inside absorber
Or packed tower.When for packed tower, filler can be single-layer or multi-layer, and absorber is provided with outer circulation and interior circulation, and outer circulation is negative
System regeneration is blamed, interior recycle is responsible for absorption system equilibrium state.Outer circulation is 1-2 layers, and interior circulation is layer 2-4, and number is specifically arranged
Amount determines that heat exchanger or circulating pump is separately provided in each circulation layer, and according to related specifications to dynamic equipment according to project exhaust gas volumn
It carries out spare.Absorber lower section bottom solution is divided into three parts: first part changes with the second heat exchanger (heat supply network secondary heat exchanger)
It is returned after heat and forms partial circulating at the top of absorber lower section；Second part is sent to the 5th heat exchanger (dilute concentrated solution heat exchanger) heating
Enter regenerative system later；Part III enters solution filtering tempering system, and in absorber lower section bottom, mating solution filtering is adjusted
On the one hand matter system can remove the solid particulate matter and generation that solution accumulates in absorption plant by cyclone+filter device
The substances such as crystal salt (sulfate, carbonate etc.), the pollutant for making absorber solution and Control of Impurities are to a certain degree；It is another
Alkali salt is added in aspect, adjusts the PH of solution, keeps the absorbability of solution, while reducing the corrosivity of solution.Absorbing liquid is from suction
It receives device top to enter, the neat stress reverse convection by uniformly spraying and from absorber bottom entrance, water vapour quilt in neat stress
Concentrated solution absorbs, upper section and the settable spare level of the respective spraying layer of lower section, to improve the reliability of absorption plant.Due to absorbing
Device bottom flue gas moisture content is high, and most of water suction occurs in this section, by adjusting the control of absorber lower section partial circulating amount of solution
Absorption tower lower section equilibrium temperature, to control the water absorbing capacity of unit mass salting liquid, the weak solution concentration after absorption is relatively dense
The ratio of solution reduction 1%-10%, partial circulating internal circulating load and regeneration cycle amount can be in 1:1-10:1.
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 waste heat recovery system, absorption plant, regenerative system including being sequentially communicated setting, the regenerative system is also
Including,
Dilute solution inlet and steam (vapor) outlet is arranged in flash tank, upper part；
Compressor, saturator and the horizontal regenerating unit of graphene, the horizontal regenerating unit of graphene include shell and are set to
Heat-exchanging tube bundle in it, the flash tank steam (vapor) outlet, compressor, saturator and the heat-exchanging tube bundle air inlet successively connect
Logical, absorption plant, the 5th heat exchanger, the shell are connected to the flash tank, so that from the dilute of the absorption plant bottom
Solution and the concentrated solution from the flash tank enter the horizontal regenerating unit of the graphene after exchanging heat in the 5th heat exchanger, and
It exchanges heat with the live steam of secondary steam and/or unit extraction from the flash tank steam (vapor) outlet, it is dilute after heat exchange
Solution enters in the flash tank.
2. flue gas waste heat recovery system according to claim 1, which is characterized in that the diameter of the heat-exchanging tube bundle with it is described
The ratio between diameter of the housing is 0.5 or more, and less than 1；
The content of graphene is 50wt%-80wt% in the used material of heat-exchanging tube bundle；
The heat-exchanging tube bundle is inserted into the ratio between the intracorporal depth of shell and the shell length 0.5 or more, and less than 1.
3. flue gas waste heat recovery system according to claim 2, which is characterized in that the heat-exchanging tube bundle be it is U-shaped, it is U-shaped to change
The open end of heat pipe bundle is located at the hull outside, and closed end is located at the enclosure interior.
4. flue gas waste heat recovery system according to claim 3, which is characterized in that the heat-exchanging tube bundle is several U-tubes,
The U-tube includes straight pipe and bend loss, and the outer surface of the straight pipe is plane or ripple type curved surface.
5. flue gas waste heat recovery system according to claim 4, which is characterized in that the both ends of the shell are respectively set
One end socket and the second end socket, being not inserted into the intracorporal heat-exchanging tube bundle of the shell and extending to extraneous and one end from the first end socket is steam
Import, the other end are steam condensate (SC) outlet, and weak solution outlet and the first sewage draining exit are provided on second end socket；The shell
Body is additionally provided with the second sewage draining exit and dilute solution inlet, and the dilute solution inlet, the 5th heat exchanger and absorption plant bottom are successively
Connection.
6. flue gas waste heat recovery system according to claim 5, which is characterized in that the horizontal regenerating unit of graphene
Steam condensate (SC) outlet be connected to third heat exchanger so that high-temperature steam exchange heat after the condensed water that generates enter third heat exchanger and
Hot net water or low plus condensed water exchange heat；
The flash tank steam (vapor) outlet is connected to the 4th heat exchanger, so that secondary steam enters the 4th heat exchanger and changes with hot net water
Heat；
The horizontal regenerating unit of graphene is connected to the 4th heat exchanger, so that the condensed water generated after secondary steam heat exchange enters
4th heat exchanger exchanges heat with hot net water or low plus condensed water；
The flash tank, the 5th heat exchanger are sequentially communicated with the 6th heat exchanger, so that the concentrated solution of the flash tank bottom is
It exchanges heat in five heat exchangers with weak solution, and continues to cool down by the 6th heat exchanger, be then back to first cigarette of absorption plant
It is recycled at the top of gas disposal area.
7. smoke processing system according to claim 1 to 6, which is characterized in that the flue gas waste heat recovery system
System further includes dust-extraction unit, desulfurizer, is sequentially communicated with absorption plant, regenerative system.
8. the smoke processing system according to any one of claim 7, which is characterized in that the absorption plant includes,
Reservoir unit is set in the absorption plant, and its inner cavity is divided into the first fume treatment area and the second fume treatment
Area, flue gas are suitable for entering second fume treatment area from first fume treatment area by the reservoir unit；
First spray unit in the inner close to the setting of the middle and upper part of the absorption plant, and is located at the top of the reservoir unit,
The flash tank concentrated solution outlet, the 5th heat exchanger, the 6th heat exchanger and the first spray unit are sequentially communicated setting, will exchange heat
Concentrated solution afterwards is sprayed by first spray unit on the flue gas of rising；
Second spray unit is set in the absorption plant, close to the reservoir unit and is disposed below, the reservoir list
Member, First Heat Exchanger and the second spray unit are sequentially communicated setting, after exchanging heat with the solution after smoke contacts described in feeding
Second spray unit, then spray on neat stress, with neat stress reverse convection；
Solution filters tempering system, positioned at the lower part of the absorption plant, successively with the second heat exchanger, second spray unit
Connection is sent into second spray unit after weak solution is filtered quenched and heat exchange；
Gas inlet is located at the lower part of the absorption plant, and exhanst gas outlet is located at the top of the absorption plant, exhanst gas outlet with
Chimney connection, first spray unit, reservoir unit and the second spray unit are respectively positioned between gas inlet and exhanst gas outlet；
Demister is set in the absorption plant, and between first spray unit and the exhanst gas outlet.
9. the smoke processing system according to any one of claim 8, which is characterized in that
The First Heat Exchanger, liquid feeding end are connected to the reservoir unit, and outlet end is close to the reservoir unit and described the
One fume treatment area connection, so that the solution in the reservoir unit enters heat exchange in the First Heat Exchanger, and will be after heat exchange
Solution be sent into first fume treatment area and smoke contacts；
The lower part of the absorption plant, the second heat exchanger and the second spray unit are sequentially communicated setting, by weak solution through exchanging heat
After be sent into second spray unit；
The First Heat Exchanger, the second heat exchanger, third heat exchanger and the 4th heat exchanger are sequentially communicated, so that heat supply network water or low
Pressure condensation water passes sequentially through the First Heat Exchanger, the second heat exchanger, third heat exchanger and the 4th heat exchanger, and corresponding to entering
Substance in heat exchanger exchanges heat.
10. the smoke processing system according to any one of claim 9, which is characterized in that the absorption plant lower part with
The first pump of setting between second heat exchanger or second heat exchanger and the second spray unit；
The absorption plant lower part and solution filtering tempering system or solution filtering tempering system are changed with described second
The second pump of setting between hot device or second heat exchanger and second spray unit；
The absorption plant lower part and the 5th heat exchanger or the 5th heat exchanger and the horizontal regeneration of the graphene fill
Set or the horizontal regenerating unit of the graphene and the flash tank between setting third pump；
Flash tank concentrated solution outlet with it is between the 5th heat exchanger or the 5th heat exchanger and the 6th heat exchanger or described
The 4th pump of setting between 6th heat exchanger and the first spray unit；
External 5th pump of 4th heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910678199.6A CN110394032A (en) | 2019-07-25 | 2019-07-25 | A kind of flue gas waste heat recovery system and its horizontal regenerating unit of graphene |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910678199.6A CN110394032A (en) | 2019-07-25 | 2019-07-25 | A kind of flue gas waste heat recovery system and its horizontal regenerating unit of graphene |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110394032A true CN110394032A (en) | 2019-11-01 |
Family
ID=68325945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910678199.6A Pending CN110394032A (en) | 2019-07-25 | 2019-07-25 | A kind of flue gas waste heat recovery system and its horizontal regenerating unit of graphene |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110394032A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113720180A (en) * | 2021-08-30 | 2021-11-30 | 浙江工业大学 | Graphite alkene bellows waste heat recovery device with oil smoke filter equipment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205897939U (en) * | 2016-07-08 | 2017-01-18 | 广州市耀华电器有限公司 | Heat exchange tube for heat exchanger |
| CN107543431A (en) * | 2016-06-28 | 2018-01-05 | 哈尔滨市金京锅炉有限公司 | A kind of Boiler Steam heat-exchanger rig |
| CN109442449A (en) * | 2018-11-30 | 2019-03-08 | 中国华电科工集团有限公司 | A kind of spray treatment device of flue gas |
| CN109821340A (en) * | 2019-02-21 | 2019-05-31 | 中国华电科工集团有限公司 | A kind of double regenerated smoke processing systems |
| CN210814573U (en) * | 2019-07-25 | 2020-06-23 | 中国华电科工集团有限公司 | Flue gas waste heat recovery system and horizontal regenerating unit of graphite alkene thereof |
-
2019
- 2019-07-25 CN CN201910678199.6A patent/CN110394032A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107543431A (en) * | 2016-06-28 | 2018-01-05 | 哈尔滨市金京锅炉有限公司 | A kind of Boiler Steam heat-exchanger rig |
| CN205897939U (en) * | 2016-07-08 | 2017-01-18 | 广州市耀华电器有限公司 | Heat exchange tube for heat exchanger |
| CN109442449A (en) * | 2018-11-30 | 2019-03-08 | 中国华电科工集团有限公司 | A kind of spray treatment device of flue gas |
| CN109821340A (en) * | 2019-02-21 | 2019-05-31 | 中国华电科工集团有限公司 | A kind of double regenerated smoke processing systems |
| CN210814573U (en) * | 2019-07-25 | 2020-06-23 | 中国华电科工集团有限公司 | Flue gas waste heat recovery system and horizontal regenerating unit of graphite alkene thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113720180A (en) * | 2021-08-30 | 2021-11-30 | 浙江工业大学 | Graphite alkene bellows waste heat recovery device with oil smoke filter equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106500122A (en) | A kind of elimination coal fired power plant chimney white haze is while the system and method for Mist heat recovering and water | |
| CN106766391A (en) | For the tank-type heat exchanger of heat pump | |
| CN109442449A (en) | A kind of spray treatment device of flue gas | |
| CN106369866A (en) | Waste steam directly absorbed type double-effect lithium bromide heat pump system and working method thereof | |
| CN110394031A (en) | A kind of waste heat recycles the device for the white joint Waste water concentrating that disappears | |
| CN209714683U (en) | A kind of flue gas processing device | |
| CN105664514B (en) | Horizontal MVC evaporators | |
| CN110394032A (en) | A kind of flue gas waste heat recovery system and its horizontal regenerating unit of graphene | |
| CN109395540A (en) | A kind of original obvious heat of smoke deep exploitation regenerative system | |
| CN110440239A (en) | A kind of the depth recyclable device and method of heat of smoke discharged from boiler of power station and moisture | |
| CN208504437U (en) | A kind of dedusting of boiler smoke disappears white waste heat recovering energy conserving emission-reducing system | |
| CN109821340A (en) | A kind of double regenerated smoke processing systems | |
| CN210814573U (en) | Flue gas waste heat recovery system and horizontal regenerating unit of graphite alkene thereof | |
| CN207871570U (en) | A kind of device of rapidly pre-warming MVR vapo(u)rization systems | |
| CN110500602A (en) | A kind of energy-saving and water-saving and cold-heat combined device | |
| CN109569199A (en) | A kind of flue gas processing device | |
| CN109469918A (en) | A kind of flue heating regenerating unit | |
| CN109350983A (en) | A kind of two-stage compression heat pump double-effect evaporation concentration systems | |
| CN205627127U (en) | MVR triple -effect evaporator | |
| CN208952070U (en) | A kind of steam lithium bromide chiller afterheat utilizing system | |
| CN209714684U (en) | A kind of smoke processing system of energy-saving and water-saving | |
| CN209386332U (en) | A kind of spray treatment device of flue gas | |
| CN209612254U (en) | Thermo-compression evaporation crystal system | |
| CN209540928U (en) | A kind of flue heating regenerating unit | |
| CN209270860U (en) | A kind of two-stage compression heat pump double-effect evaporation concentration systems |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |