CN208839295U - A kind of water spray direct-cooling type flue gas condensing system - Google Patents

Abstract

The utility model discloses a kind of water spray direct-cooling type flue gas condensing systems, the flue gas condensing system includes: separating element, it 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, 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 utility model 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

A kind of water spray direct-cooling type flue gas condensing system

Technical field

The utility model relates to the environmental technology fields of smoke gas treatment, more particularly, are related to a kind of water spray direct-cooling type cigarette Gas condenser system.

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: being directly entered desulfurization slurry bring 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.

Utility model content

In order to solve the problems in the existing technology, the purpose of the utility model is to provide one kind to have higher heat exchange effect Rate (solving the problems, such as arrangement space anxiety) enters the problem of desulfurization slurry brings desulfurization level to weigh without condensate liquid again simultaneously, separately The water spray direct-cooling type flue gas condensing system for the features such as safe and reliable, structure is simple, investment cost is low is also taken into account outside.

The utility model 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.

According to one embodiment of the utility model water spray direct-cooling type flue gas condensing system, the separating element includes laterally Separator 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.

According to one embodiment of the utility model water spray direct-cooling type flue gas condensing system, the separating element includes annular 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 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.

According to one embodiment of the utility model water spray direct-cooling type flue gas condensing system, it is disposed in the communicating passage Spiral leads cigarette structural member.

According to one embodiment of the utility model water spray direct-cooling type flue gas condensing system, spray storehouse passes through neat stress and exports It is connected with flue net after desulfurization, the flue gas condensing system further includes that the secondary demisting unit and setting of spray the top of the warehouse is arranged in Temperature detecting unit and/or humidity detection unit in neat stress outlet.

According to one embodiment of the utility model water spray direct-cooling type flue gas condensing system, the spray tube protrudes into spray storehouse Part be provided on spray head and spray tube and be provided with regulating valve, the regulating valve and the temperature detecting unit and/or wet It spends detection unit coupling and realizes remote auto control.

According to one embodiment of the utility model water spray direct-cooling type flue gas condensing system, the circulating cooling unit passes through Discharge outlet will spray the flue gas condensing liquid extraction collected in storehouse 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 cold water Tower.

According to one embodiment of the utility model water spray direct-cooling type flue gas condensing system, point of the flue gas condensing system After unit is arranged in desulfurization in net flue or after wet scrubber.

According to one embodiment of the utility model water spray direct-cooling type flue gas condensing system, the desulfurization of the desulfurizing tower lower part Storehouse is provided with smoke inlet, desulfurization unit, a demisting unit and desulfurization slurry outlet, and the desulfurization unit includes starching with desulfurization Liquid 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 flue gas Desulfurization spray.

Compared with prior art, the utility model can be at the top of desulfurizing tower, at the top of wet scrubber or after structure of modification Desulfurization after net flue (the biggish power plant in space positioned opposite) be arranged, arrangement is flexible, applied widely, substantially not It is limited by arrangement space；Using cooling water direct-injection heat transfer technology, heat exchange efficiency is high, and no septate heat transfer and liquid film thermal resistance, structure are small Ingeniously；Using the spray storehouse design structure of separation, shower water and flue gas condensing liquid are not related with the desulfurization slurry in desulfurization storehouse, There is no desulfurization level weighing apparatus problems, since without specific heating surface, relatively newly-increased resistance can be neglected substantially；Due to using spray Heat transfer 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 and corrosion-resistant problem, it is reliable for operation；Further, since the spray temperature difference greatly increases using external recirculated cooling water, it can be effective Sprayer Circulation water is reduced, significantly saves itself power consumption, 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 structure of the water spray direct-cooling type flue gas condensing system according to one exemplary embodiment of the utility model Schematic diagram.

Fig. 5 shows the knot of the water spray direct-cooling type flue gas condensing system according to the utility model another exemplary embodiment Structure schematic diagram.

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 problem of the utility model is according to the de- whitening method such as the condensation of slurries in the prior art and flue gas condensing and device point Analysis, based on the white mandatory requirement for solving the problems, such as haze is taken off to flue gas, develops a kind of new technology, the water spray direct-cooling type flue gas condensing System has very high heat exchange efficiency (solving the problems, such as arrangement space anxiety), while not having condensate liquid and entering desulfurization slurry The problem of bringing desulfurization level to weigh, in addition it can take into account the features such as safe and reliable, structure is simple, investment cost is lower, furthermore It can also considered that using long-range DCS control means on the basis of system control, makes system automation, intelligent operation, meet state Family's policy requirements.

The structure and principle of the utility model water spray direct-cooling type flue gas condensing system are illustrated below.

Fig. 4 shows the structure of the water spray direct-cooling type flue gas condensing system according to one exemplary embodiment of the utility model Schematic diagram, Fig. 5 show the knot of the water spray direct-cooling type flue gas condensing system according to the utility model another exemplary embodiment Structure schematic diagram.

As shown in Figure 4 and Figure 5, exemplary embodiment according to the present utility model, water spray direct-cooling type flue gas condensing system System 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 utility model both can be in existing desulfurizing tower On the basis of transformation at the top of desulfurizing tower is obtained, can also directly manufacture and design to obtain including the utility model flue gas condensing system Desulfurization tower.For example, being arranged in the spray storehouse at the top of desulfurizing tower can be used whole glass steel-metalwork company in transformation Fitting molding, be connected at the top of pedestal and desulfurizing tower (solderable, can also flange bolt), can site operation assemble, small investment and again Amount is light；In addition, 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 Glass inner-lining 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 utility model passes through preferably in the spray storehouse that desulfurizing tower top layout and desulfurization storehouse 20 are spaced 30, while direct spraying cooling is carried out to the flue gas after desulfurization for entering spray storehouse 30 using external circulating cooling station, it is effectively real Show flue gas condensing and ensure that higher heat exchange efficiency, can also effectively reduce Sprayer Circulation water, significantly saves itself electricity Consumption, operating cost are ultralow；In addition, there is no the heat exchange of slurries plate and the abrasion of flue gas cooling scheme to ask using spray heat transfer technology Topic need not also 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, can also be by the separation list of flue gas condensing system other than in desulfurizing tower top layout according to the utility model Member 31 is arranged in after desulfurization in flue only or (is suitable for the relatively large power plant of arrangement space) after wet scrubber, this is practical new Type to this with no restriction.

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 utility model 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 utility model, separating element 31 include transverse separators 311 and longitudinal separators 312, the two cooperation realize spray storehouse separation and guiding from flue gas after desulfurization to spray storehouse.

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, realizes the gentle introducing of flue gas after desulfurization in 32.

As shown in figure 5, another exemplary embodiment according to the present utility model, separating element 31 includes annular spacer 313 and cap structure part 314, similarly, the two cooperation realize spray storehouse separation and guiding from flue gas after desulfurization to spray storehouse.

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 utility model is connected by neat stress outlet 40 with flue net after desulfurization, thus after condensing Desulfurization fume 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 can take in the utility model two Kind embodiment, the utility model can also use other separating element structures, as long as can be realized effective point with desulfurization storehouse Every and spray storehouse in effective flue gas condensing fall into the protection scope of the utility model.

According to the utility model, 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 preferably using conventional corrugated plastic plate ( Configurable high efficiency demister), by increasing level-one demisting unit newly, escape spray liquid can be effectively controlled, reduce smoke moisture and cigarette The impurity that gas carries arranges that efficient honeycombed sheet type flue gas heater creates conditions for subsequent flue gas reheat.Also, flue gas condensing system System preferably further includes the temperature detecting unit and/or humidity detection unit 39 that neat stress outlet 40 is arranged in, by cold The automatic control of whole condenser system is realized in the detection of desulfurization fume after solidifying.

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 utility model is selected can Think open cycle cooling tower or power plant's cooling tower, is preferably provided with regulating valve 36 on spray tube 37, the regulating valve 36 and 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.

The circulating cooling unit of the utility model can collect obtained flue gas condensing for storehouse 30 is sprayed by discharge outlet 33 Liquid is drawn to be used as the flushing water of the moisturizing of external cooling stations 35, the water distribution of desulfurization slurry or secondary demisting unit 38, is System water consumption is small or even can be realized zero water consumption, substantially without discharging of waste liquid.In addition, water of the utility model for recirculated cooling water Matter is of less demanding, and 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.

When carrying out the condensation of flue gas after desulfurization using above-mentioned water spray direct-cooling type flue gas condensing system, flue gas after desulfurization is imported In the spray storehouse separated in desulfurizing tower with desulfurization storehouse, external recirculated cooling water is introduced into spray storehouse, flue gas after desulfurization is sprayed It is discharged after desulfurization fume after leaching is condensed.

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 the utility model design structure is simple, adjustable range is wide, it is only necessary to be carried out according to different unit capacities Adjusted design takes off white condensation technology for flue gas and is created conditions using generalization, standardized designs and had exploitativeness.The whole series system System does not use expensive material, and flue gas condensing construction cost and cost can be greatly lowered, well solved in the prior art The problems such as arrangement space is nervous, desulfurization level weighs.

The utility model is not limited to specific embodiment above-mentioned.The utility model expands to any in this specification The new feature of middle disclosure or any new combination, and disclose any new method or process the step of or any new group It closes.

Claims (9)

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.