CN107930309A - A kind of wet plume eliminates system - Google Patents
A kind of wet plume eliminates system Download PDFInfo
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- CN107930309A CN107930309A CN201711482429.9A CN201711482429A CN107930309A CN 107930309 A CN107930309 A CN 107930309A CN 201711482429 A CN201711482429 A CN 201711482429A CN 107930309 A CN107930309 A CN 107930309A
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- water
- cooling subsystem
- water tank
- flue gas
- wet plume
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
-
- 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
- B01D53/002—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 condensation
-
- 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
- B01D53/1456—Removing acid components
- B01D53/1481—Removing sulfur dioxide or sulfur trioxide
-
- 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
- B01D53/14—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
- B01D53/185—Liquid distributors
-
- 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
- B01D53/265—Drying gases or vapours by refrigeration (condensation)
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
Abstract
The present invention relates to a kind of wet plume to eliminate system, it includes the first cooling subsystem, the second cooling subsystem and heater being sequentially arranged between desulfurizing tower exhanst gas outlet and chimney；First cooling subsystem includes first circulation water loop, and spray equipment and cyclic water tank are equipped with first circulation water loop, and the second cooling subsystem includes connecting the teflon heat exchanger set with spray equipment；Cyclic water tank is connected with the first cooling subsystem and the second cooling subsystem, and the recirculated water of spray equipment is recycled into along first circulation water loop for collecting condensed water and shower water and providing；Water tank is further included, water tank is connected with the overflow port of cyclic water tank.The wet plume eliminates system, water lift and wet plume phenomenon can be completely eliminated effectively from flue gas, and environment purification while can improve the water-use efficiency of power plant.
Description
Technical field
The present invention relates to chimney improvement and water-saving, field of energy-saving technology, and in particular to a kind of wet plume eliminates system.
Background technology
Since chimney breast discharge in coal-burning power plant's is saturation wet flue gas, it is directly discharged in air, can goes out by chimney
The phenomenon of existing wet plume " big white cigarette ", this can substantially reduce degree of recognition of the surrounding resident to power plant's near-zero release, also have part to occupy
The people propose relevant state and ask, and some areas government such as Shanghai City was issued on January 29th, 2016《Coal-burning power plant's air
Pollutant emission standard》(DB31/963-2016), it is desirable to which " coal-fired electric generation furnace should take fibre selection and other effective measures
Phenomena such as eliminating gypsum rain, coloured plume ".
It is well known that China is one of poorest country of global water resources.Therefore, the water resource of wet flue gas recycles
Not only conform with《The energy-saving and emission-reduction of coal electricity upgrade and transformation action plan》The coal-burning power plant that (hair changes 2014 No. 2093 texts of the energy) proposes
Energy-saving policy requirements, also comply with what State Council promulgated in April, 2015《Water prevention and cure of pollution action plan》(" ten, water ") carries
The Strategic Demand of " improving water-use efficiency, do a good job of it Industrial Water Saving " for going out.
Therefore, the wet plume in coal-burning power plant is administered to be not only the needs of coal-burning power plant's efforts at environmental protection or extremely urgent need to solve
Certainly the problem of.
At present, based on the exploration and research to wet plume formation mechenism, the governance approach of three kinds of wet plumes has been summed up：It is cold
Solidifying method, condensation reheating method, heating.
Patent No. 201520332165.9, patent name are pollutant in a kind of depth waste heat recovery cooperation-removal flue gas
Device, its technical solution mainly include level-one residual neat recovering system, electrostatic precipitation demercuration system, depth waste heat recovery collaboration it is more
De- system, efficient desulfurization dust-removal system, flue gas reheat system, chimney.The technical solution is exactly to employ the principle of heating, main
If by before desulphurization system the more de- systems of depth waste heat recovery collaboration heat is absorbed from former flue gas and to before chimney
Neat stress release heat, achieve the purpose that flue gas reheat, the exhaust gas temperature of chimney inlet is increased to more than 80 DEG C.This is
Although the phenomenon of the wet plume of chimney " big white cigarette " can be mitigated or eliminated in system, which does not obtain moisture content from flue gas, largely
Flue gas in the moisture content that carries the water consumption for air, not reducing power plant is arranged by chimney, can not and when winter temperature is low
The big white cigarette phenomenon of chimney is completely eliminated.
Patent No. 201610583258.8, patent name are a kind of flue gas condensing water pumping system, its technical solution is main
Including flue gas condensing end system, flue gas low-temperature receiver end system, flue gas condensing end system includes desulfuration absorbing tower, gas cleaning condensing tower
And condensation water storage box, low-temperature receiver end system are mainly made of heat exchange columns.The technical solution is exactly to employ the principle of condensation method, main
If by shower water spraying cooling wet flue gas, so that wet flue gas removes moisture content, after shower water is cooled down by heat exchange columns,
The cyclic process that spray column carries out spraying cooling is again introduced into, so as to achieve the purpose that flue gas condensing water lift.The system can subtract
The wet plume phenomenon of film chimney, but the wet plume phenomenon of chimney cannot be completely eliminated.
Patent No. 201610557193.X, patent name remove system, its technology for coal-fired flue-gas deep purifying plume
Scheme mainly includes cooling phase-change knockouts, flue demister and warmer in flue, and desulfurizing tower exiting flue gas passes through successively
Through smoke stack emission after cooling phase-change knockouts, flue demister and warmer processing.The system uses the principle of condensation reheating method,
Using the method slightly to heat up again after small size cooling, dehydration, so as to reach mitigation or the mesh of wet plume is completely eliminated in the part period
's.Due to using dividing wall type cooling phase-change knockouts, heat transfer coefficient and heat transfer temperature and pressure are small, therefore temperature drop is relatively low, system
Condensed water is less, and, it is necessary to during by flue gas condensing to relatively low temperature during winter, then the effect of reheating is carried out to wet flue gas,
Wet plume can be completely eliminated.
Therefore, how effectively from flue gas water lift and can be completely eliminated wet plume phenomenon be those skilled in the art urgently
The technical problem of solution.
The content of the invention
The object of the present invention is to provide a kind of wet plume to eliminate system, water lift and can disappear completely effectively from flue gas
Dehumidify plume phenomenon, and environment purification while can improve the thermal efficiency and water-use efficiency of power plant.
In order to solve the above technical problems, the present invention, which provides a kind of wet plume, eliminates system, it includes being sequentially arranged in desulfurizing tower
The first cooling subsystem, the second cooling subsystem and heater between exhanst gas outlet and chimney；First cooling subsystem
Including first circulation water loop, spray equipment and cyclic water tank, the second cooling are equipped with the first circulation water loop
System includes connecting the teflon heat exchanger set with the spray equipment；The cyclic water tank and first cooling subsystem
Connect with second cooling subsystem, circulated for collecting condensed water and shower water and providing along the first circulation water loop
Into the recirculated water of the spray equipment；Water tank is further included, the water tank is connected with the overflow port of the cyclic water tank.
Wet plume provided by the present invention eliminates system and is arranged between desulfurizing tower exhanst gas outlet and chimney, and flue gas first passes through the
One cooling subsystem and the cooling of the second cooling subsystem, can remove fine particulates, bivalent mercury, the SO in flue gas3Aerosol and
The pollutants such as soluble-salt, and the water for being condensed out from flue gas sufficient amount is stored in water tank for wet desulfurization system
Moisturizing etc. uses.After the first cooling subsystem and the second cooling subsystem cool twice, the temperature of flue gas and containing wet
Amount all reduces, then after heater heat temperature raising so that the undersaturated condition that smoke moisture reaches a certain level, you can real
Now eliminate the phenomenon of wet plume.
First cooling subsystem cools down flue gas with the heat exchange mode that flue gas directly contacts by shower water, directly
The heat exchange mode of contact can be avoided since the coefficient of heat transfer of heat transmission equipment is low, coolant media of water temperature rise is low, heat transmission equipment corrosion
And the problems such as abrasion (containing in flue gas with corrosive material and particle), the coefficient of heat transfer directly contacted is up to 104
~105W/(m3* between DEG C), and coolant media water temperature can be increased to be close with the inlet temperature of flue gas, that is, effectively improve
Heat exchange efficiency, is greatly reduced the temperature of flue gas, and condensation effect is good.
Meanwhile flue gas, when by the first cooling subsystem, the nozzle atomization shower water of spray equipment, adds space region
The fine drop concentration in domain, that is, add the contact probability of fine drop and fine particulates so that most powder in flue gas
The fine particulates such as dirt, droplet become larger with the condensation of the vapor in flue gas and the flushing of shower water, cohesion, and by
Shower water is removed to trapping.And under the action of substantial amounts of shower water and flue gas condensing water, the bivalent mercury of part is dissolved in water
In be removed.SO3The pollutants such as aerosol, solubility salt can be washed by substantial amounts of shower water and removed.
Teflon heat exchanger is made of many flexible pipes, and caliber is smaller and densely distributed, after spray equipment sprays
Droplet is mixed with flue gas, when by teflon heat exchanger, slight jitter occurs for the flexible pipe of each dense distribution so that in flue gas
Droplet and remaining fraction particulate matter in the case where being acted on by the interception of flexible pipe, thermophoresis etc., adhered to and remove by tube wall face.By two
Level cooling system can remove particulate matter more than 90%.Meanwhile most of large dust particle has been removed when passing through spray equipment,
Abrasion of the exhaust gas dust to teflon heat exchanger can be reduced, ensures the safe and stable operation of system.And teflon heat exchanger
Good corrosion resistance, service life length.In wet plume elimination system i.e. provided by the present invention, teflon heat exchanger can play at the same time
Demisting, cooling, the effect of dedusting, i.e., further reduce the temperature of flue gas, and removes the droplet and divalence residued in flue gas
Mercury, SO3The pollutants such as aerosol, soluble-salt.
In addition, according to the formation mechenism of wet plume, when environment temperature is relatively low relative to environment temperature it is higher when more hold
Easily form wet plume phenomenon.Therefore, when the temperature of the surroundings is low, teflon heat exchanger heat exchange function open, play demisting,
While dustproof function, the temperature of flue gas is further reduced, the moisture content in condensation flue gas, so that flue gas adds in heated device
The phenomenon of wet plume can be effectively eliminated after heat；And when environment temperature is higher, the flue gas condensing drop needed for wet plume is completely eliminated
Width is smaller, heating temperature rise is smaller, at this time, can need not open the heat exchange function of teflon heat exchanger, i.e. teflon heat exchanger only rises
To demisting, the effect of dedusting.That is, the teflon heat exchanger can carry out demisting, dedusting to the flue gas for passing through spray equipment,
Its heat exchange function can also be optionally opened and closed according to environment temperature at the same time, applicability is good.
To sum up, the temperature of flue gas can be greatly reduced in the spray equipment of the first cooling subsystem so that the moisture content in flue gas is cold
Coalescence is flow in cyclic water tank with shower water, when the water in cyclic water tank exceedes first circulation water loop institute water requirement
When, unnecessary water will enter in water tank from the overflow port of cyclic water tank, wherein, the unnecessary water is essentially from flue gas condensing
Water, i.e. moisture content effectively in extraction flue gas, by the flue-gas temperature and moisture content of the first cooling subsystem and the second cooling subsystem
Reduce, wet plume phenomenon can be completely eliminated after being heated by heater, meanwhile, most dust, bivalent mercury, SO3
The pollutant such as aerosol and soluble-salt, after the first cooling subsystem and the second cooling subsystem, be condensed water and spray
Water drenching collects capture to be removed from flue gas, can reach the purpose of purifying smoke.
Alternatively, second cooling subsystem further includes the steam air heater for heating boiler air-supply, and the fluoroplastics change
The low-temperature receiver water of hot device and the heat source water of the steam air heater form second circulation water loop to be opened/closed.
Alternatively, bypass flue is further included, the bypass flue is parallel in boiler air-supply flue with the steam air heater, institute
State bypass flue and be equipped with gear door-plate to be opened/closed.
Alternatively, variable frequency pump and electronic stream are equipped with the first circulation water loop and the second circulation water loop
Adjustable valve.
Alternatively, the cooler casing between the desulfurizing tower exhanst gas outlet and the heater is further included, it is described
Teflon heat exchanger is arranged on the top of the spray equipment, and the two is respectively positioned in the housing of cooler body, the cyclic water tank
Connected with the discharge outlet of the cooler casing.
Alternatively, the nozzle of the spray equipment is fiberglass nozzle, and the inner wall of the cooler casing, described first
The inner wall of circulating water loop scribbles corrosion-inhibiting coating.
Alternatively, turbulence device is additionally provided with the housing of cooler body, the turbulence device is located at the spray equipment
Lower section.
Alternatively, alternatively, first cooling subsystem further includes air cooling tower, and being equipped with fin in the air cooling tower exchanges heat
Pipe and wind turbine, the spray equipment, the fin heat exchange pipe and the cyclic water tank form the first circulation water loop.
Alternatively, the chemicals dosing plant for being used for adjusting recirculated water acid-base value is equipped with the cyclic water tank.
Alternatively, the heater is hot Secondary Air heater, flue gas heat-exchange unit or steam heater.
Brief description of the drawings
Fig. 1 is the structure diagram that the wet plume that the embodiment of the present invention is provided eliminates system；
Fig. 2 is the schematic diagram that wet plume eliminates.
In attached drawing 1-2, the reference numerals are as follows：
1- smoke inlets；2- smoke outlets 2；31- spray equipments, 32- cyclic water tanks, 321- water inlets, 322- water outlets, 323-
Overflow port, 33- first circulation water loops, 34- chemicals dosing plants, 35- air cooling towers, 351- fin heat exchange pipes, 352- wind turbines；41- fluorine
Plastic heat exchanger, 42- steam air heaters, 43- second circulation water loops, 431- moisturizing entrances, 44- variable frequency pumps, 45- electric flow tune
Save valve, 46- flowmeters；5- heaters；6- water tanks；7- cooler casings；8- turbulence devices；9- bypass flues；91- keeps off door
Plate.
Embodiment
It is below in conjunction with the accompanying drawings and specific real in order to make those skilled in the art more fully understand technical scheme
Applying example, the present invention is described in further detail.
Please refer to Fig.1 and Fig. 2, Fig. 1 are that the wet plume that the embodiment of the present invention is provided eliminates the structure diagram of system；Figure
2 be the schematic diagram that wet plume eliminates.
As shown in Figure 1, an embodiment of the present invention provides a kind of wet plume to eliminate system, it includes being sequentially arranged in desulfurizing tower cigarette
Gas exports the first cooling subsystem, the second cooling subsystem and the heater 5 between chimney.Wherein, the first cooling subsystem
Including first circulation water loop 33, spray equipment 31 and cyclic water tank 32, the second cooling are equipped with the first circulation water loop 33
Subsystem includes connecting the teflon heat exchanger 41 set with spray equipment 31.32 and first cooling subsystem of cyclic water tank and
Two cooling subsystems connect, and spray dress is recycled into for collecting condensed water and shower water and providing along first circulation water loop 33
Put 31 recirculated water；Water tank 6 is further included, which connects with the overflow port 323 of cyclic water tank 32.
As shown in Figure 1, the flue gas of desulfurizing tower exhanst gas outlet discharge enters in the wet plume elimination system through smoke inlet 1, lead to
The first cooling subsystem and the cooling of the second cooling subsystem are crossed, dust, bivalent mercury, the SO in flue gas can be removed3Aerosol and can
The pollutants such as soluble, and the water for being condensed out from flue gas sufficient amount is stored in water tank 6 for wet desulfurization system
Moisturizing etc. uses.It is discharged into after the heated device 5 of the condensed flue gas that cools down twice heats by smoke outlet 2 to chimney and finally
When in air, wet plume phenomenon can be effectively eliminated.
As shown in Fig. 2, wherein curve represents wet saturation curve, A points are the temperature of wet desulphurization exiting flue gas, and B points are cigarette
The temperature that gas is reached by direct-fired method, D points are cold by the first cooling subsystem and the second cooling subsystem for flue gas
But the temperature after, temperature of the E points for D points flue gas after heating, C points are local environment temperature, can be obvious from figure
Find out, although snead process (A-C) can also achieve the purpose that wet plume, the i.e. mistake that B points are spread to environment C points is completely eliminated
The process that journey and E points are spread to environment C points with curve without intersection point (smoke moisture is not up to saturation), but to cigarette in the present embodiment
Gas reheats after being cooled down, and while can guarantee that elimination wet plume phenomenon, can reduce heating-up temperature, and then reduces energy consumption,
And the system can remove moisture content effectively from flue gas and be used for wet desulfurization system moisturizing, power plant water is reduced.
First cooling subsystem includes spray equipment 31, i.e. first cooling subsystem is directly connect by shower water with flue gas
Tactile heat exchange mode cools down flue gas, and the heat exchange mode directly contacted can avoid the coefficient of heat transfer due to heat transmission equipment
It is low, coolant media of water temperature rise is small, heat transmission equipment corrosion and abrasion the problems such as (in flue gas contain with corrosive material and
Grain), the coefficient of heat transfer directly contacted is up to 104~105W/(m3* between DEG C), and coolant media water temperature can be increased to
It is close with the inlet temperature of flue gas, that is, effectively improves heat exchange efficiency, the temperature of flue gas is greatly reduced, coolant media flow is small,
Condensation effect is good.Meanwhile flue gas, when by the first cooling subsystem, the nozzle atomization shower water of spray equipment 31, adds
The fine drop concentration of area of space, that is, add the contact probability of fine drop and dust so that most thin in flue gas
The fine particulates such as microparticle thing, droplet become with the condensation of the vapor in flue gas and the flushing of shower water, cohesion
Greatly, and by shower water to trapping remove.And under the action of substantial amounts of shower water and flue gas condensing water, the bivalent mercury of part
It is soluble in water to be removed.SO3The pollutants such as aerosol, solubility salt can be washed by substantial amounts of shower water and removed.
Second cooling subsystem includes connecting the teflon heat exchanger 41 set, the teflon heat exchanger with spray equipment 31
41 are made of many flexible pipes, and caliber is smaller and densely distributed, and flue gas is when by teflon heat exchanger 41, each dense distribution
Flexible pipe slight jitter occurs so that in flue gas remaining fraction particulate matter in the case where being acted on by the interception of flexible pipe, thermophoresis etc.,
Adhered to and remove by tube wall face moisture film.Particulate matter more than 90% can be removed by two-stage cooling system.Meanwhile most of bulky grain powder
Dirt can reduce abrasion of the flue gas to teflon heat exchanger 41, ensure the safety of system by being removed during spray equipment 31
Stable operation.And the good corrosion resistance of teflon heat exchanger 41, service life length.Wet plume i.e. provided by the present invention eliminates
In system, teflon heat exchanger 41 can play the role of demisting, cooling, dedusting at the same time, i.e., further reduce the temperature of flue gas, and
Remove the droplet and bivalent mercury, SO residued in flue gas3The pollutants such as aerosol, soluble-salt.
As shown in Fig. 2, according to the formation mechenism of wet plume, when environment temperature is relatively low relative to environment temperature it is higher when
Wet plume phenomenon is more readily formed.Therefore, when the environment temperature decreases, the heat exchange function of teflon heat exchanger 41 is opened, and is being risen
While to demisting, dustproof function, the temperature of flue gas is further reduced, the moisture content in condensation flue gas, so that flue gas is passing through
The phenomenon of wet plume can be effectively eliminated after heater heating；And when environment temperature is higher, the cigarette needed for wet plume is completely eliminated
The solidifying range of decrease of air cooling is smaller, heating temperature rise is smaller, at this time, can need not open the heat exchange function of teflon heat exchanger 41, i.e. fluoroplastics
Heat exchanger 41 only plays the role of demisting, dedusting.That is, the teflon heat exchanger 41 can be to the cigarette by spray equipment 31
Gas carries out demisting, dedusting, while its heat exchange function can also be optionally opened and closed according to environment temperature, and applicability is good.
To sum up, the temperature of flue gas can be greatly reduced in the spray equipment 31 of the first cooling subsystem so that the moisture content in flue gas
Condense and flow to shower water in cyclic water tank 32, when the water in cyclic water tank 32 exceedes needed for first circulation water loop
During water, unnecessary water will enter in water tank 6 from the overflow port of cyclic water tank 32, wherein, the unnecessary water is essentially from cigarette
The solidifying water of air cooling, i.e. moisture content effectively in extraction flue gas, by the flue gas temperature of the first cooling subsystem and the second cooling subsystem
Degree and moisture content reduce, and wet plume phenomenon can be completely eliminated after the heating of heater 5, meanwhile, most dust, two
Valency mercury, SO3The pollutant such as aerosol and soluble-salt, it is cold after the first cooling subsystem and the second cooling subsystem
Condensate and shower water collect capture to be removed from flue gas, can reach the purpose of purifying smoke.
Steam air heater 42 is further included in the second cooling subsystem in the above-described embodiments, which is used for heating boiler
Air-supply, wherein, the low-temperature receiver water of teflon heat exchanger 41 and the heat source water of steam air heater 42 form second circulation water loop 43.Wherein fluorine
Plastic heat exchanger 41 is cooled down by low-temperature receiver water for wet flue gas, and steam air heater 42 is heated by heat source water for boiler air-supply,
Above-mentioned low-temperature receiver water and heat source water form second circulation water loop 43, which is closed circulation system, and interior
The clean free from admixture of portion's cycle water, can exempt pipeline and cause corrosion and scaling equivalent risk, therefore, structure, material to steam air heater 42
It is not limited, can such as uses the dividing wall type heat exchanger of ordinary carbon steel material.
When the environment temperature decreases, the heat exchange function of teflon heat exchanger 41 is opened, and second circulation water loop 43 normally follows
Ring, flue gas carry out secondary cooling through teflon heat exchanger 41, and to be down to lower temperature, boiler air-supply is heated through steam air heater 42, with
Boiler efficiency is improved, at this time, teflon heat exchanger 41 plays while demisting, dustproof function is played herein in connection with steam air heater 42
Mist heat recovering improves the effect of boiler efficiency, cools twice by the first cooling subsystem and the second cooling subsystem
Afterwards, the temperature of flue gas and water capacity all reduce, then after 5 heat temperature raising of heater so that flue gas is in a degree of
Undersaturated condition, you can realize the phenomenon for eliminating wet plume.And when environment temperature is higher, the heat exchange work(of teflon heat exchanger 41
Can be without opening, boiler air-supply closes second circulation water loop 43, at this time, teflon heat exchanger 41, which plays, to be removed without heating
Mist, the effect of dedusting, i.e., further remove the bivalent mercury residued in flue gas, SO3The pollutants such as aerosol, soluble-salt.
That is the system can be wet ensureing to eliminate according to the opening and closing second circulation water loop 43 of the conditions such as environment temperature selectivity
While the phenomenon of plume, ensure maximum economy.
In the above-described embodiments, which eliminates system and further includes bypass flue 9, the bypass flue 9 and steam air heater 42
It is parallel in boiler air-supply flue, when ambient temperature is relatively low, which closes, i.e., bypass flue 9 is closed, boiler
Air-supply is heated by steam air heater 42, and when ambient temperature is higher, steam air heater 42 need not exchange heat, and open the gear door-plate
91 open bypass flue 9, and at this time, boiler air-supply is from bypass flue 9 by that can reduce boiler fan resistance.Wherein, door-plate is kept off
91 can be electric gear door-plate 91, it can be achieved that remote operation.
In the above-described embodiments, it is equipped with variable frequency pump 44 in first circulation water loop 33 and second circulation water loop 43
With electric flow control valve 45, to be followed according to the factor of particular condition in use or environment to first circulation water loop 33 and second
Ring water loop 43 is opened and closed or the operation of flow control.Meanwhile variable frequency pump 44 and electric flow control valve 45 are easy to implement
Remote control.Meanwhile flowmeter 46 is also provided with first circulation water loop 33 and second circulation water loop 43, to monitor
Water flow situation.When monitoring, the water flow in second circulation water loop 43 is smaller, then can fill into water purification from moisturizing entrance 431.
In the above-described embodiments, which further includes cooler casing 7 with elimination system, it is communicated in desulfurization tower flue gas and goes out
Between mouth and heater 5, teflon heat exchanger is arranged on the top of spray equipment 31, and the two is respectively positioned in the cooler casing 7,
That is, smoke inlet 1 is the sole flue gas entrance of cooler casing 7, the flue gas of desulfurizing tower exhanst gas outlet discharge is from smoke inlet 1
Into in the cooler casing 7, heated after spray equipment 31 and teflon heat exchanger 41 cool down twice through heater 5, finally
Drained into from chimney in external environment.At this time, cyclic water tank 32 is connected with the discharge outlet of the cooler casing 7, you can is collected at the same time
The shower water of the condensed water and spray equipment 31 of first cooling subsystem and the second cooling subsystem.
In the above-described embodiments, the nozzle of spray equipment 31 is fiberglass nozzle, and the inner wall of cooler casing 7, first
The inner wall of circulating water loop 33 scribbles corrosion-inhibiting coating, is mixed with since shower water to flue gas after cooling cleaning is carried out, inside it
SO3The pollutant such as aerosol and soluble-salt, its may cause pipeline structure or block the problem of, fiberglass nozzle it is corrosion-resistant
Property is preferable, while corrosion-inhibiting coating can play a protective role equipment, prolong the service life.
In the above-described embodiments, turbulence device 8 is additionally provided with cooler casing 7, which is located at spray equipment 31
Lower section, i.e., the side positioned at spray equipment 31 towards air-flow upstream, after flue gas flows through the turbulence device 8, air-flow uniformly, it is steady
It is fixed, it may be such that shower water is uniform with smoke contacts, and then lift cooling dust removing effects.
In the above-described embodiments, the first cooling subsystem further includes heat exchange columns, spray equipment 31, heat exchange columns and cyclic water tank
32 form first circulation water loop 33, and cyclic water tank 32 is equipped with water inlet 321, water outlet 322 and overflow port 323, wherein, water inlet
Mouthfuls 321 connect with the water outlet of cooler casing 7, and water outlet 322 is communicated in first circulation water loop 33, overflow port 323 and
Water tank 6 connects, and water outlet 322 is less than overflow port 323.The shower water of spray equipment 31 after cooling down to flue gas its
Temperature can raise, and the shower water with higher temperature enters in cyclic water tank 32 and is re-used as spraying after the tower cooler that exchanges heat
Water drenching sprays flue gas.After a period of time is run, the water of shower water is certain, and the water level in cyclic water tank 32 will be with
Increasing for condensed water in flue gas and rise, when water level rises to overflow port 323, you can flow out into 6 memory of water tank
Storage.Water in the water tank 6 can be used for wet desulfurization system moisturizing, when water yield is more than the water consumption of wet desulfurization system moisturizing
When, can also be by the water in the water tank 6 after corresponding processing at remaining water consumption of electric power supply plant, to save power plant water.In summer
, can be toward mending in water tank 6 when that cannot meet the water of stable supplying wet desulphurization in water tank 6 under hot hot environment
Fill supply water so that water tank 6 can have the function that stable supplying wet desulfurization system moisturizing.
In the above-described embodiments, heat exchange columns are air cooling tower 35, i.e., with outside ambient air heat friendship occurs for internal recirculated water
Swap-in and realize cooling, fin heat exchange pipe 351 and wind turbine 352 are set in the air cooling tower 35, wherein, fin heat exchange pipe 351 connects
In first circulation water loop 33, wind turbine 352 is used to accelerate the recirculated water in cooling fin heat exchange pipe 351, and exchange heat implementation
It is relatively simple.It is of course also possible to the heat of the recirculated water is recycled, such as heat exchange columns are set to by for other systems
Heat is provided to realize the effect to cool down to recirculated water.
The chemicals dosing plant 34 for adjusting recirculated water acid-base value is additionally provided with cyclic water tank 32 in the above-described embodiments.Follow
Ring water tank 32 primarily serves regulating water quality, balances the effect of water level, and the water quality in cyclic water tank 32 is detected by chemicals dosing plant 34
State, the dosage for adjusting chemicals dosing plant 34 maintains the water quality of whole system, to meet use demand.
In the above-described embodiments, heater 5 is for hot Secondary Air heater, flue gas heat-exchange unit or steam heater etc., specifically
It is not limited, can be configured according to the actual conditions of power plant.
The system can not only eliminate the wet plume phenomenon of chimney, moreover it is possible to deviate from moisture content from flue gas, as wet desulphurization system
The supplement moisture content of system, reaches the target of zero water consumption of desulphurization system, solves the problems, such as power plant's wet method water consumption of water shortage the Northwest, and
Can also fine particulates, bivalent mercury, SO in cooperation-removal wet flue gas3The multiple pollutant such as aerosol and soluble-salt, it is effectively net
Change environment.
It the above is only the preferred embodiment of the present invention, it is noted that come for those skilled in the art
Say, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications also should be regarded as
Protection scope of the present invention.
Claims (10)
1. a kind of wet plume eliminates system, it is characterised in that including be sequentially arranged between desulfurizing tower exhanst gas outlet and chimney the
One cooling subsystem, the second cooling subsystem and heater (5)；
First cooling subsystem includes first circulation water loop (33), and spray is equipped with the first circulation water loop (33)
Device (31) and cyclic water tank (32), second cooling subsystem include connecting the fluorine modeling set with the spray equipment (31)
Expect heat exchanger (41)；
The cyclic water tank (32) connects with first cooling subsystem and second cooling subsystem, is condensed for collecting
Water and shower water simultaneously provide the recirculated water that the spray equipment (31) are recycled into along the first circulation water loop (33)；
Water tank (6) is further included, the water tank (6) connects with the overflow port (323) of the cyclic water tank (32).
2. wet plume according to claim 1 eliminates system, it is characterised in that second cooling subsystem further includes use
In the steam air heater (42) of heating boiler air-supply, the low-temperature receiver water of the teflon heat exchanger (41) and the heat source of the steam air heater (42)
Water forms second circulation water loop (43) to be opened/closed.
3. wet plume according to claim 2 eliminates system, it is characterised in that further includes bypass flue (9), the bypass
Flue (9) is parallel in boiler air-supply flue with the steam air heater (42), and the bypass flue (9) is equipped with gear door-plate to be opened/closed
(91)。
4. wet plume according to claim 2 eliminates system, it is characterised in that the first circulation water loop (33) and institute
State in second circulation water loop (43) and be equipped with variable frequency pump (44) and electric flow control valve (45).
5. system is eliminated according to the wet plume of claim 1-4 any one of them, it is characterised in that further include arranged on the desulfurization
Tower flue gas exports the cooler casing (7) between the heater (5), and the teflon heat exchanger (41) is arranged on the spray
The top of device (31), and the two is respectively positioned in the cooler casing (7), the cyclic water tank 32 and the cooler casing
(7) discharge outlet connection.
6. wet plume according to claim 5 eliminates system, it is characterised in that the nozzle of the spray equipment (31) is glass
Glass steel nozzle, and the inner wall of the cooler casing (7), the inner wall of the first circulation water loop (33) scribble anti-corrosion painting
Layer.
7. wet plume according to claim 5 eliminates system, it is characterised in that is additionally provided with the cooler casing (7)
Turbulence device (8), the turbulence device (8) are located at the lower section of the spray equipment (31).
8. system is eliminated according to the wet plume of claim 1-4 any one of them, it is characterised in that first cooling subsystem
Air cooling tower (35) is further included, fin heat exchange pipe (351) and wind turbine (352), the spray equipment are equipped with the air cooling tower (35)
(31), the fin heat exchange pipe (351) and the cyclic water tank (32) form the first circulation water loop (33).
9. system is eliminated according to the wet plume of claim 1-4 any one of them, it is characterised in that in the cyclic water tank (32)
Equipped with the chemicals dosing plant (34) for adjusting recirculated water acid-base value.
10. system is eliminated according to the wet plume of claim 1-4 any one of them, it is characterised in that the heater (5) is heat
Secondary Air heater, flue gas heat-exchange unit or steam heater.
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| CN109876589A (en) * | 2019-03-15 | 2019-06-14 | 海宁马桥大都市热电有限公司 | The system and method for white purified treatment are taken off for Hazards in Power Plant flue gas |
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| CN110260679A (en) * | 2019-04-18 | 2019-09-20 | 清华大学 | A kind of spray column, exhaust system and boiler system |
| CN111928683A (en) * | 2020-06-23 | 2020-11-13 | 福建省气柜设备安装有限公司 | White smoke treatment device for mechanical cooling tower |
| CN112944376A (en) * | 2021-02-08 | 2021-06-11 | 陕西陕化煤化工集团有限公司 | Colored smoke plume removing system and application |
| CN113588310A (en) * | 2021-07-30 | 2021-11-02 | 西安热工研究院有限公司 | Flue gas moisture recovery experimental apparatus that ring type was arranged |
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