CN108815980A - A kind of water spray direct-cooling type flue gas condensing system and method - Google Patents
A kind of water spray direct-cooling type flue gas condensing system and method Download PDFInfo
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- CN108815980A CN108815980A CN201810938098.3A CN201810938098A CN108815980A CN 108815980 A CN108815980 A CN 108815980A CN 201810938098 A CN201810938098 A CN 201810938098A CN 108815980 A CN108815980 A CN 108815980A
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- spray
- flue gas
- desulfurization
- storehouse
- water
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/002—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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
- B01D5/0027—Condensation of vapours; Recovering volatile solvents by condensation by direct contact between vapours or gases and the cooling medium
- B01D5/003—Condensation of vapours; Recovering volatile solvents by condensation by direct contact between vapours or gases and the cooling medium within column(s)
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
- B01D5/0078—Condensation of vapours; Recovering volatile solvents by condensation characterised by auxiliary systems or arrangements
- B01D5/0087—Recirculating of the cooling medium
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- 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
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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 invention discloses a kind of water spray direct-cooling type flue gas condensing system and method, the flue gas condensing system includes：Separating element is arranged in desulfurizing tower top and forms the spray storehouse being mutually separated with the desulfurization storehouse of desulfurizing tower lower part on desulfurizing tower top, and the spray storehouse is connected to by communicating passage with desulfurization storehouse, and the lowest part for spraying storehouse is provided with discharge outlet；Circulating cooling unit is connected and including water pump, external cooling stations and the spray tube for protruding into the spray storehouse progress flue gas spray condensation with the discharge outlet.The water spray direct-cooling type flue gas condensing method imports flue gas after desulfurization in the spray storehouse separated in desulfurizing tower with desulfurization storehouse, and external recirculated cooling water is introduced into spray storehouse and be discharged after desulfurization fume after spraying cooling is condensed to the flue gas after desulfurization.Present invention heat exchange efficiency with higher, while entering the problem of desulfurization slurry brings desulfurization level to weigh without condensate liquid again, also take into account the features such as safe and reliable, structure is simple, investment cost is low.
Description
Technical field
The present invention relates to the environmental technology fields of smoke gas treatment, more particularly, it is cold to be related to a kind of water spray direct-cooling type flue gas
Solidifying system and method.
Background technique
At present domestic thermal power plant be basically completed minimum discharge transformation, although standard limit of smog release meet minimum discharge NOx,
SO2And dust emission standard, but desulfurizing tower exports wet saturated flue gas and directly passes through smoke stack emission (as shown in Figure 1), goes out in chimney
Mouth forms white plume, and in winter with the biggish area of ambient humidity, white plume tail is longer, when with illumination, white
Plume shows black gray expandable, causes serious visual pollution and forms condensable Particulate Pollution (being commonly called as " gypsum rain ").
Newest result of study shows that the main component of gypsum rain is actually that wet desulphurization will have largely in flue gas
CO2The calcium bicarbonate being converted into, 16~18 grams per liter of solubility, in addition solubility can achieve the bisulfite of 33 grams per liters
Calcium, both soluble salts are discharged into the white powder (secondary aerosol species) generated after atmosphere dries out.These particulate matters are not only thin
It is small and very loose, specific surface area is very big, be difficult natural subsidence by self weight, the partial size overwhelming majority is (also less than 2.5 μm
It is the PM2.5 being commonly called as), it can float and be enriched with for a long time in an atmosphere, extremely be easy to cause the formation of haze.
Flue gas take off it is white seek to control these dissolved matter droplets escape into atmosphere.Flue gas takes off white technology path and is at present
Flue gas condensing+reheating, wherein thermal technology is that MGGH heats up (compared with mature technology, repeating no more) again, flue gas condensing technology mainly has：
Slurries condensation and flue gas condensing.
Wherein, the principle of slurries condensation is as shown in Figure 2：Slurries condensation is usually in desulfurizing tower top layer (or secondary top layer) slurries
Arrange that slurries cooler achievees the purpose that flue gas cool-down using the desulfurization slurry of external cold source chilling spray on pipeline.Slurries are cold
Solidifying method has the coefficient of heat transfer high (using water-water plate-type heat-exchange, the coefficient of heat transfer can reach 1500 or more), flexible arrangement, structure tight
Many advantages, such as gathering, but being directly entered desulfurization slurry there are wet saturated flue gas condensate liquid causes desulfurization level weighing apparatus to be difficult to control, newly
Increase the reluctant significant problem of desulfurization wastewater (subsequent processing waste liquid cost is very expensive), additionally there are slurries cooler slurries
The problem of liquid side is easy to wear, blocking, although slurries cooler uses novel wide runner design scheme, through investigating at present
The project to put into operation, wear and thinning are still difficult to control.The relevant device to come into operation at present has had already appeared very troublesome
Water balance and waste water handling problem.
The principle of flue gas condensing is as shown in Figure 3：Desulfurization slurry bring is directly entered to avoid wet saturated flue gas condensate liquid
Desulfurization level weighing apparatus problem, conventional scheme are to arrange that dividing wall type heat exchanger is cooled down on net flue after desulfurization, and flue gas is cooling
Device generally uses tubular type (fluoro-containing plastic pipe), plate heat exchanger.Though this process program can avoid desulfurization slurry water balance problem,
Since there are condensate film thermal resistances, lower (between 40~70) heat exchanger volume of the coefficient of heat transfer is huge, adds wet saturation cigarette
The newly-increased demister of the lime set that is gas-cooled removing, newly-increased resistance are also bigger.In addition after ultra-clean discharge transformation, after desulfurizing tower
Environmental protection equipment is more, for example the additional Environmental Protection Agency's setting of the equipment such as double tower Two-way Cycle, WESP, MGGH warming-up section (FGR) enters in chimney
The measuring section (rigid requirement) of mouth, the project that can provide flue cooler arrangement space is few in number, does not have substantially implementable
Property.From current investigation situation, since arrangement space limitation there is no that power plant uses the relative arrangement scheme of flue gas condensing.
Summary of the invention
In order to solve the problems in the existing technology, the object of the present invention is to provide one kind to have higher heat exchange efficiency
(solving the problems, such as arrangement space anxiety) enters the problem of desulfurization slurry brings desulfurization level to weigh without condensate liquid again simultaneously, in addition
Also take into account the water spray direct-cooling type flue gas condensing system and method for the features such as safe and reliable, structure is simple, investment cost is low.
An aspect of of the present present invention provides a kind of water spray direct-cooling type flue gas condensing system, and the flue gas condensing system includes：
Separating element is arranged in desulfurizing tower top and is formed and the desulfurization storehouse phase of desulfurizing tower lower part point on desulfurizing tower top
Every spray storehouse, the spray storehouse is connected to by communicating passage with desulfurization storehouse, and the lowest part for spraying storehouse is provided with discharge outlet；
Circulating cooling unit is connected with the discharge outlet and including water pump, external cooling stations and protrudes into the spray
Storehouse carries out the spray tube of flue gas spray condensation.
The one embodiment for direct-cooling type flue gas condensing system of spraying water according to the present invention, the separating element includes laterally separated
Part and longitudinal separators；
The transverse separators are c-type or S type plate-like piece and the arrangement using bottom angled, the transverse direction
Separator has the water blocking fence sections being vertically arranged and spray storehouse is formed at the transverse separators top；
The longitudinal separators are arranged in above transverse separators and are connected with the side wall of flue net after desulfurization, the longitudinal direction
The minimum point of separator is lower than the highest point of the transverse separators or flushes with the highest point of transverse separators, the longitudinal direction
The communicating passage for being connected to the desulfurization storehouse and spraying storehouse is formed between separator and transverse separators.
The one embodiment for direct-cooling type flue gas condensing system of spraying water according to the present invention, the separating element includes annular and separation
Part and cap structure part；
It is arranged in desulfurizing tower top to the annular spacer bottom angled and is connected with the side wall of desulfurizing tower, the annular
Spray storehouse is formed at separator top；
The cap structure part is arranged on annular spacer top and connect with annular spacer, and cap structure part has top
Cover board and side wall offer exhanst gas outlet on side wall and form the communicating passage for being connected to the desulfurization storehouse and spray storehouse.
The one embodiment for direct-cooling type flue gas condensing system of spraying water according to the present invention, is disposed with spiral in the communicating passage
Lead cigarette structural member.
The one embodiment for direct-cooling type flue gas condensing system of spraying water according to the present invention, spray storehouse are exported and are taken off by neat stress
Net flue is connected after sulphur, and the flue gas condensing system further includes that the secondary demisting unit of spray the top of the warehouse is arranged in and is arranged net
The temperature detecting unit and/or humidity detection unit of exhanst gas outlet.
The one embodiment for direct-cooling type flue gas condensing system of spraying water according to the present invention, the spray tube protrude into the portion in spray storehouse
Set up separately to be equipped on spray head and spray tube and is provided with regulating valve, the regulating valve and temperature detecting unit and/or Humidity Detection list
Remote auto control is realized in member coupling.
The one embodiment for direct-cooling type flue gas condensing system of spraying water according to the present invention, the circulating cooling unit pass through draining
Mouthful will spray the flue gas condensing liquid collected of storehouse draw as the moisturizing of external cooling stations, the water distribution of desulfurization slurry and/or
The flushing water of secondary demisting unit uses, wherein the external cooling stations are open cycle cooling tower or power plant's cooling tower.
The one embodiment for direct-cooling type flue gas condensing system of spraying water according to the present invention, the separation list of the flue gas condensing system
Member is arranged in after desulfurization in flue only or after wet scrubber.
The one embodiment for direct-cooling type flue gas condensing system of spraying water according to the present invention, the desulfurization storehouse of the desulfurizing tower lower part is set
It is equipped with smoke inlet, desulfurization unit, a demisting unit and desulfurization slurry outlet, the desulfurization unit includes going out with desulfurization slurry
Mouth is connected and including slurries pump and desulfurization slurry spray tube, and the desulfurization slurry spray tube protrudes into desulfurization storehouse and carries out flue gas desulfurization
Spray.
Invention also provides a kind of water spray direct-cooling type flue gas condensing methods, cold using above-mentioned water spray direct-cooling type flue gas
Solidifying system carries out the condensation of flue gas after desulfurization.
The present invention also provides a kind of water spray direct-cooling type flue gas condensing methods, flue gas after desulfurization are imported in desulfurizing tower and de-
In the spray storehouse that sulphur storehouse separates, external recirculated cooling water is introduced into spray storehouse, flue gas after desulfurization progress spraying cooling is obtained
It is discharged after desulfurization fume after to condensation.
The one embodiment for direct-cooling type flue gas condensing method of spraying water according to the present invention, the temperature of the external recirculated cooling water
It is 15~35 DEG C, the temperature of desulfurization fume is 45~47 DEG C after the condensation；
To spray the flue gas condensing water collected of storehouse as the moisturizing of external cooling stations, the water distribution of desulfurization slurry and/
Or the flushing water of demisting unit uses and adjusts external recirculated cooling water according to the temperature and/or humidity of desulfurization fume after cooling
Spray flow.
Compared with prior art, the present invention can be de- at the top of desulfurizing tower, at the top of wet scrubber or after structure of modification
Net flue (the biggish power plant in space positioned opposite) is arranged after sulphur, and arrangement is flexible, applied widely, substantially not by cloth
It is limited between emptying；Using cooling water direct-injection heat transfer technology, heat exchange efficiency is high, no septate heat transfer and liquid film thermal resistance, compact structure；It adopts
With the spray storehouse design structure of separation, shower water and flue gas condensing liquid are not related with the desulfurization slurry in desulfurization storehouse, do not deposit
In desulfurization level weighing apparatus problem, since without specific heating surface, relatively newly-increased resistance can be neglected substantially；Due to using spray heat exchange
Technology, there is no slurries plates to change the wear problem with flue gas cooling scheme, need not also consider heating surface using expensive metal cost
It is reliable for operation with corrosion-resistant problem；Further, since the spray temperature difference greatly increases using external recirculated cooling water, can effectively reduce
Sprayer Circulation water, significantly saves itself power consumption, and operating cost is ultralow.
Detailed description of the invention
Fig. 1, which is shown, not to carry out flue gas in the prior art and takes off white Structure of Flue Gas Desulfuration Absorbing schematic illustration.
Fig. 2 shows use slurries condensing mode to carry out flue gas in the prior art to take off white Structure of Flue Gas Desulfuration Absorbing principle signal
Figure.
Fig. 3, which is shown, to carry out flue gas using flue gas condensing mode in the prior art and takes off white Structure of Flue Gas Desulfuration Absorbing principle signal
Figure.
Fig. 4 shows the structural representation of water spray direct-cooling type flue gas condensing system according to an illustrative embodiment of the invention
Figure.
The structure that Fig. 5 shows the water spray direct-cooling type flue gas condensing system of another exemplary embodiment according to the present invention is shown
It is intended to.
Description of symbols：
10- desulfurizing tower, 20- desulfurization storehouse, 21- smoke inlet, 22- slurries pump, 23- desulfurization slurry spray tube, 24- are once removed
Mist unit, 30- spray storehouse, 31- separating element, 311- transverse separators, 312- longitudinal separators, 313- annular spacer,
314- cap structure part, 32- communicating passage, 33- discharge outlet, 34- water pump, 35- external cooling stations, 36- regulating valve, 37- spray
Shower pipe, bis- demisting units of 38-, 39- temperature detecting unit and/or humidity detection unit, the outlet of 40- neat stress.
Specific embodiment
All features disclosed in this specification or disclosed all methods or in the process the step of, in addition to mutually exclusive
Feature and/or step other than, can combine in any way.
Any feature disclosed in this specification unless specifically stated can be equivalent or with similar purpose by other
Alternative features are replaced.That is, unless specifically stated, each feature is an example in a series of equivalent or similar characteristics
?.
The present invention is analyzed according to the condensation of slurries in the prior art with the problem of de- whitening method such as flue gas condensing and device, base
In taking off the white mandatory requirement for solving the problems, such as haze to flue gas, a kind of new process system and process are developed, the water spray is straight
Cold type flue gas condensing system and method have very high heat exchange efficiency (solving the problems, such as arrangement space anxiety), while not having
Condensate liquid enters the problem of desulfurization slurry brings desulfurization level to weigh, and in addition it can take into account, safe and reliable, structure is simple, capital cost
With it is lower the features such as, additionally it can be considered that system control on the basis of use long-range DCS control means, make system automation,
Intelligence operation meets national policy requirement.
Lower mask body is illustrated water spray direct-cooling type flue gas condensing system and method for the invention.It is direct-cooled to spraying water first
The structure and principle of formula flue gas condensing system are stressed.
Fig. 4 shows the structural representation of water spray direct-cooling type flue gas condensing system according to an illustrative embodiment of the invention
Figure, Fig. 5 show the structural schematic diagram of the water spray direct-cooling type flue gas condensing system of another exemplary embodiment according to the present invention.
As shown in Figure 4 and Figure 5, an exemplary embodiment of the present invention, the water spray direct-cooling type flue gas condensing system packet
It includes：
Separating element 31 is arranged in 10 top of desulfurizing tower and is formed and 10 lower part of desulfurizing tower on 10 top of desulfurizing tower
The spray storehouse 30 that desulfurization storehouse 20 is mutually separated, spray storehouse 30 are connected to by communicating passage 32 with desulfurization storehouse 20, and the minimum of storehouse 30 is sprayed
Place is provided with discharge outlet 33；Circulating cooling unit, be connected with discharge outlet 33 and including water pump 34, external cooling stations 35 and
Protrude into the spray tube 37 that spray storehouse 30 carries out flue gas spray condensation.Wherein, the size of discharge outlet 33 need to meet the equal energy of maximum duty
Smoothly draining, water pump 34 can be water circulating pump or variable frequency pump.
Wherein, desulfurizing tower 10 can use the conventional structure of the prior art, and the present invention both can be in the base of existing desulfurizing tower
Transformation at the top of desulfurizing tower is obtained on plinth, can also directly manufacture and design to obtain the desulfurizing tower including flue gas condensing system of the present invention
Equipment.For example, transformation when, be arranged in the spray storehouse at the top of desulfurizing tower can be used whole glass steel-metalwork connector at
Type, be connected at the top of pedestal and desulfurizing tower (solderable, can also flange bolt), can site operation assemble, small investment and light-weight；Separately
Outside, spray storehouse and flue gas, spray liquid contact position directly adopt glass reinforced plastic, it is not necessary to carry out secondary preservative treatment (such as liner glass
Glass scale resin etc.), small investment and short construction period.
The desulfurization storehouse 20 of 10 lower part of desulfurizing tower is provided with smoke inlet 21, desulfurization unit, a demisting unit 24 and desulfurization
Serum outlet, desulfurization unit include being connected with desulfurization slurry outlet and pumping 22 and desulfurization slurry spray tube 23 including slurries, are taken off
Sulphur slurries spray tube 23 protrudes into desulfurization storehouse 30 and carries out flue gas desulfurization sprinkle.Wherein, a setting of demisting unit 24 is starched in desulfurization
23 top of liquid spray tube.
It follows that the present invention is by the spray storehouse 30 that is preferably spaced in desulfurizing tower top layout and desulfurization storehouse 20,
Direct spraying cooling is carried out to the flue gas after desulfurization for entering spray storehouse 30 using external circulating cooling station simultaneously, is effectively realized
Flue gas condensing simultaneously ensure that higher heat exchange efficiency, can also effectively reduce Sprayer Circulation water, significantly save itself power consumption, fortune
Row cost is ultralow；In addition, using spray heat transfer technology, there is no slurries plate heat exchange and flue gas cooling scheme wear problem,
It need not consider that heating surface uses expensive metal cost and corrosion-resistant problem, therefore run more reliable.
The advantage of above structure first is that take full advantage of the headspace of desulfurizing tower, be not take up net flue after desulfurizing tower,
There is no the problems that arrangement space is inadequate, as long as theoretically can be carried out arranging using the power plant of wet desulphurization, the scope of application
Extensively, arrangement is flexible and is not limited substantially by arrangement space.
It according to the present invention, can also be by the separating element 31 of flue gas condensing system other than in desulfurizing tower top layout
Be arranged in after desulfurization in net flue or (be suitable for the relatively large power plant of arrangement space) after wet scrubber, the present invention to this not
It is restricted.
Another clear superiority of above structure is that shower water and flue gas condensing liquid have obtained effective separation, will not be with desulfurization
The problem of tower slurries are related, and are completely absent desulfurization slurry water balance, and due to increasing resistance newly relatively without specific heating surface
Substantially negligible.
The present invention provides two kinds of specific embodiments according to above-mentioned mentality of designing.
As described in Figure 4, an exemplary embodiment according to the present invention, separating element 31 include 311 He of transverse separators
The guiding of the separation for spraying storehouse and flue gas after desulfurization to spray storehouse is realized in longitudinal separators 312, the two cooperation.
Wherein, transverse separators 311 preferably c-type or S type plate-like piece and the arrangement using bottom angled,
Spray storehouse 30 is formed at 311 top of transverse separators.Longitudinal separators 312 be arranged above transverse separators 311 and with after desulfurization
The side wall of net flue is connected, the minimum points of longitudinal separators 312 lower than the highest point of transverse separators 311 or with it is laterally separated
The highest point of part 311 flushes, and is formed between longitudinal separators 312 and transverse separators 311 and is connected to desulfurization storehouse 20 and spray storehouse 30
Communicating passage 32.
The specific structure of transverse separators 311 can be determined by numerical simulation calculation, it should be ensured that flue gas after desulfurization is with minimum
Resistance cost can smoothly enter into spray storehouse 30.As shown in figure 4, transverse separators 311 have the vertical section portion as water blocking fence
Point, which cooperates with tilting bottom structure, it can be ensured that shower water and flue gas are sufficiently mixed uniform and energy smoothly
It is discharged outside spray storehouse by discharge outlet, while shower water or flue gas condensing water cannot cross water blocking fence and enter in desulfurization storehouse.This
Outside, the recirculated cooling water except discharge spray storehouse 30 and flue gas condensing water are able to enter after external cooling stations cool down
It is again introduced into spray tube cooled flue gas, loops back and forth like this and realizes recycling for cooling water.Further, it is preferable in communicating passage
Arrange that spiral leads cigarette structural member in 32, to realize the gentle introducing of flue gas after desulfurization.
As shown in figure 5, another exemplary embodiment according to the present invention, separating element 31 includes annular spacer 313
With cap structure part 314, similarly, the guiding of the separation for spraying storehouse and flue gas after desulfurization to spray storehouse is realized in the two cooperation.
Wherein, it is arranged in 313 bottom angled of annular spacer 10 top of desulfurizing tower and is connected with the side wall of desulfurizing tower, ring
Spray storehouse 30 is formed at 313 top of shape separator；The setting of cap structure part 314 is in 313 top of annular spacer and and annular and separation
Part 313 connects, and cap structure part 314 has lamina tecti and side wall, and exhanst gas outlet is offered on side wall and forms connection desulfurization storehouse
With the communicating passage 32 in spray storehouse.Wherein, the structure of cap structure part 314 can according to need adjustment and design, but equally answer
Ensure that flue gas after desulfurization can smoothly enter into spray storehouse 30 with the smallest resistance cost, and it is ensured that annular spacer 313 and wind
The accommodation space formed between cap structure part 314 and desulfurizing tower can guarantee that shower water or flue gas condensing water do not cross cap structure
Part 314 enters in desulfurization storehouse 20.
Spray storehouse 30 in the present invention is connected by neat stress outlet 40 with flue net after desulfurization, thus desulfurization after condensing
Flue gas directly pass through net flue after desulfurization be oriented to subsequent heating equipment and realizing effectively take off it is white.
The structure of two exemplary embodiments of above-mentioned Fig. 4 and Fig. 5 is only the two kinds of realities that can be taken in the present invention program
Mode is applied, the present invention can also use other separating element structures, as long as can be realized effective separation in spray storehouse and desulfurization storehouse
And effective flue gas spray condensation in spray storehouse falls into protection scope of the present invention.
According to the present invention, flue gas condensing system further includes that the secondary demisting unit 38 at 30 top of spray storehouse is arranged in, secondary
Demisting unit 38 is arranged above spray tube 37.Secondary demisting unit 38 (can also preferably be matched using conventional corrugated plastic plate
Set high efficiency demister), by increasing level-one demisting unit newly, escape spray liquid can be effectively controlled, reduce smoke moisture and flue gas is taken
The impurity of band arranges that efficient honeycombed sheet type flue gas heater creates conditions for subsequent flue gas reheat.Also, flue gas condensing system is excellent
Selection of land further includes the temperature detecting unit and/or humidity detection unit 39 that neat stress outlet 40 is arranged in, by after to condensation
The automatic control of whole condenser system is realized in the detection of desulfurization fume.
External cooling stations 35 are used with the spray tube 37 protruded into spray storehouse 30 and the drainpipe being connected with discharge outlet 33
Pipeline connects and is formed closed circuit, and the part that spray tube 37 protrudes into spray storehouse is provided with spray head, and spray head quantity can basis
Demand setting, should ensure that spray atomizing works well and is not easy to plug.The external cooling stations 35 that the present invention selects can be
Open cycle cooling tower or power plant's cooling tower are preferably provided with regulating valve 36 on spray tube 37, which can be with temperature
It spends detection unit and/or remote auto control is realized in the coupling of humidity detection unit 39, be not necessarily to manual intervention.
Circulating cooling unit of the invention can will spray the flue gas condensing liquid that the collection of storehouse 30 obtains by discharge outlet 33 and draw
The flushing water as the moisturizing of external cooling stations 35, the water distribution of desulfurization slurry or secondary demisting unit 38 uses out, system consumption
Water is small or even can be realized zero water consumption, substantially without discharging of waste liquid.In addition, the present invention for recirculated cooling water water quality requirement not
Height, the acid ingredient in flue gas condensing liquid can just carry out water quality scale removal (need not in addition supplement acid solution).
With the citing of 300MW unit, opposite slurries cooling scheme, slurry temperature is 45 DEG C, and external coolant water temperature is 15~35
DEG C, slurries chilling spray quantity of circulating water about 5500t/h, external cooling cycle water is only 600~2000t/h.
Invention also provides a kind of water spray direct-cooling type flue gas condensing methods, and it is direct-cooled that above-mentioned water spray can be directly used
The condensation of formula flue gas condensing system progress flue gas after desulfurization.According to the present invention, water spray direct-cooling type flue gas condensing method of the invention
Mainly flue gas after desulfurization is imported in the spray storehouse separated in desulfurizing tower with desulfurization storehouse, external recirculated cooling water is introduced and is sprayed
Flue gas after desulfurization be discharged after desulfurization fume after spraying cooling is condensed in storehouse.
Wherein, the temperature for using external recirculated cooling water is 15~35 DEG C, and the temperature of desulfurization fume is after gained condensation
45~47 DEG C.
It, can be using the flue gas condensing water that spray storehouse is collected as the benefit of external cooling stations when carrying out flue gas condensing
The flushing water of water, the water distribution of desulfurization slurry or demisting unit is used and is adjusted according to the temperature or humidity of desulfurization fume after cooling outer
Set the spray flow of recirculated cooling water.
In conclusion design structure of the present invention is simple, adjustable range is wide, it is only necessary to is adjusted according to different unit capacities
Design takes off white condensation technology for flue gas and is created conditions using generalization, standardized designs and had exploitativeness.Whole system is equal
Expensive material is not used, and flue gas condensing construction cost and cost can be greatly lowered, well solved and arranged in the prior art
The problems such as space is nervous, desulfurization level weighs.
The invention is not limited to specific embodiments above-mentioned.The present invention, which expands to, any in the present specification to be disclosed
New feature or any new combination, and disclose any new method or process the step of or any new combination.
Claims (12)
1. a kind of water spray direct-cooling type flue gas condensing system, which is characterized in that the flue gas condensing system includes：
Separating element, is arranged in desulfurizing tower top and is formed on desulfurizing tower top and be mutually separated with the desulfurization storehouse of desulfurizing tower lower part
Storehouse is sprayed, the spray storehouse is connected to by communicating passage with desulfurization storehouse, and the lowest part for spraying storehouse is provided with discharge outlet；
Circulating cooling unit, be connected with the discharge outlet and including water pump, external cooling stations and protrude into the spray storehouse into
The spray tube of row flue gas spray condensation.
2. water spray direct-cooling type flue gas condensing system according to claim 1, which is characterized in that the separating element includes cross
To separator and longitudinal separators；
The transverse separators are described laterally separated for c-type or S type plate-like piece and using the arrangement of bottom angled
Part has the water blocking fence sections being vertically arranged and spray storehouse is formed at the transverse separators top；
The longitudinal separators are arranged in above transverse separators and are connected with the side wall of flue net after desulfurization, the longitudinal subdivision
The minimum point of part is lower than the highest point of the transverse separators or flushes with the highest point of transverse separators, the longitudinal subdivision
The communicating passage for being connected to the desulfurization storehouse and spraying storehouse is formed between part and transverse separators.
3. water spray direct-cooling type flue gas condensing system according to claim 1, which is characterized in that the separating element includes ring
Shape separator and cap structure part；
It is arranged in desulfurizing tower top to the annular spacer bottom angled and is connected with the side wall of desulfurizing tower, the annular and separation
Spray storehouse is formed at part top；
The cap structure part is arranged on annular spacer top and connect with annular spacer, and cap structure part has lamina tecti
And side wall, exhanst gas outlet is offered on side wall and forms the communicating passage for being connected to the desulfurization storehouse and spray storehouse.
4. water spray direct-cooling type flue gas condensing system according to claim 3, which is characterized in that cloth in the communicating passage
It is equipped with spiral and leads cigarette structural member.
5. water spray direct-cooling type flue gas condensing system according to claim 1, which is characterized in that spray storehouse is gone out by neat stress
Mouth is connected with flue net after desulfurization, and the flue gas condensing system further includes that the secondary demisting unit of spray the top of the warehouse is arranged in and sets
Set the temperature detecting unit and/or humidity detection unit in neat stress outlet.
6. water spray direct-cooling type flue gas condensing system according to claim 5, which is characterized in that the spray tube protrudes into spray
The part in storehouse, which is provided on spray head and spray tube, is provided with regulating valve, the regulating valve and temperature detecting unit and/or humidity
Remote auto control is realized in detection unit coupling.
7. water spray direct-cooling type flue gas condensing system according to claim 5, which is characterized in that the circulating cooling unit is logical
The flue gas condensing liquid extraction collected in storehouse will be sprayed as the moisturizing of external cooling stations, the water distribution of desulfurization slurry by crossing discharge outlet
And/or the flushing water of secondary demisting unit uses, wherein the external cooling stations are open cycle cooling tower or power plant's cold water
Tower.
8. water spray direct-cooling type flue gas condensing system according to claim 1, which is characterized in that the flue gas condensing system
Separating element is arranged in after desulfurization in flue only or after wet scrubber.
9. water spray direct-cooling type flue gas condensing system according to claim 1, which is characterized in that the desulfurizing tower lower part takes off
Sulphur storehouse is provided with smoke inlet, desulfurization unit, a demisting unit and desulfurization slurry outlet, the desulfurization unit
Serum outlet is connected and including slurries pump and desulfurization slurry spray tube, and the desulfurization slurry spray tube protrudes into desulfurization storehouse and carries out cigarette
Desulfurization spray.
10. a kind of water spray direct-cooling type flue gas condensing method, which is characterized in that using spray described in any one of claims 1 to 9
The condensation of water direct-cooling type flue gas condensing system progress flue gas after desulfurization.
11. a kind of water spray direct-cooling type flue gas condensing method, which is characterized in that by flue gas after desulfurization import desulfurizing tower in desulfurization storehouse
In the spray storehouse of separation, by external recirculated cooling water be introduced into spray storehouse in the flue gas after desulfurization carry out spraying cooling obtain it is cold
It is discharged after desulfurization fume after solidifying.
12. water spray direct-cooling type flue gas condensing method according to claim 11, which is characterized in that the external circulating cooling
The temperature of water is 15~35 DEG C, and the temperature of desulfurization fume is 45~47 DEG C after the condensation；
The flue gas condensing water that spray storehouse is collected as the moisturizing of external cooling stations, the water distribution of desulfurization slurry and/or is removed
The flushing water of mist unit uses and adjusts the spray of external recirculated cooling water according to the temperature and/or humidity of desulfurization fume after cooling
Amount.
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