CN113184932B - Utilize flue gas evaporative concentration device and desulfurization effluent disposal system - Google Patents

Utilize flue gas evaporative concentration device and desulfurization effluent disposal system Download PDF

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Publication number
CN113184932B
CN113184932B CN202110452256.6A CN202110452256A CN113184932B CN 113184932 B CN113184932 B CN 113184932B CN 202110452256 A CN202110452256 A CN 202110452256A CN 113184932 B CN113184932 B CN 113184932B
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flue gas
tower body
clear liquid
sedimentation tank
pipeline
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CN113184932A (en
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李湧
尹卫华
张军营
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Wuhan Tiankonglan Environmental Protection Technology Co ltd
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Wuhan Tiankonglan Environmental Protection Technology Co ltd
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/02Treatment of water, waste water, or sewage by heating
    • C02F1/04Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • C02F1/048Purification of waste water by evaporation
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D51/00Auxiliary pretreatment of gases or vapours to be cleaned
    • B01D51/10Conditioning the gas to be cleaned
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/02Treatment of water, waste water, or sewage by heating
    • C02F1/04Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • C02F1/10Treatment of water, waste water, or sewage by heating by distillation or evaporation by direct contact with a particulate solid or with a fluid, as a heat transfer medium
    • C02F1/12Spray evaporation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/02Treatment of water, waste water, or sewage by heating
    • C02F1/04Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • C02F1/16Treatment of water, waste water, or sewage by heating by distillation or evaporation using waste heat from other processes
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F2001/007Processes including a sedimentation step
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/18Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Treating Waste Gases (AREA)

Abstract

The invention provides an evaporation and concentration device utilizing flue gas, which comprises a tower body, wherein a sedimentation tank and a spray assembly are arranged in the tower body, a clear liquid tank for containing overflow liquid of the sedimentation tank is also arranged in the tower body, the spray assembly is connected with the clear liquid tank through a pipeline, a liquid inlet, a liquid outlet, a flue gas inlet and a flue gas outlet are arranged on the tower body, the liquid inlet is connected with the sedimentation tank through a pipeline, the liquid outlet is connected with the clear liquid tank, the flue gas inlet is positioned below the spray assembly, and the flue gas outlet is positioned at the top of the tower body; still relate to a desulfurization waste water treatment system, including above-mentioned device. In the device, the desulfurization wastewater is precipitated and then circularly sprayed to exchange heat with the flue gas for concentration, so that the problem of concentration and scaling of the desulfurization wastewater can be avoided, the flue gas can be purified, and the humidity of the flue gas entering the desulfurization tower can be ensured.

Description

Utilize flue gas evaporative concentration device and desulfurization effluent disposal system
Technical Field
The invention relates to energy conservation and environmental protection, in particular to an evaporation concentration device utilizing flue gas and a desulfurization wastewater treatment system.
Background
In the wet flue gas desulfurization process of the existing coal-fired power plants and industrial kilns, in order to remove pollutants such as acid gas, dust and the like in flue gas, waste water needs to be discharged at regular time, and limestone slurry needs to be supplemented. Discharged waste waterThe desulfurization wastewater has the characteristics of acidity, high content of suspended matters, high content of heavy metals, high content of soluble chlorides and the like, the most common domestic desulfurization wastewater treatment method at present is a chemical precipitation method, namely a three-header process, and most of suspended matters, heavy metals and the like are removed by physical and chemical methods through neutralization, precipitation, flocculation, clarification and other means, so that the desulfurization wastewater reaches the discharge standard. However, the wastewater treated by the method still contains a large amount of Ca2+,Mg2+,Cl,SO4 2—If the plasma is directly discharged outside for a long time, the plasma can have serious influence on the surrounding water body. Meanwhile, with the improvement of national environmental standards, zero discharge of desulfurization wastewater becomes a necessary trend.
At present, methods for treating desulfurization wastewater by using flue gas waste heat in coal-fired power plants and industrial kilns include flue evaporation, heat exchanger concentration crystallization and the like. The problem that the coal-fired efficiency of the boiler is influenced by the fact that the amount of the desulfurization wastewater is too large and the heat of the flue gas is consumed due to flue evaporation (including bypass flue evaporation), namely the total amount of the desulfurization wastewater evaporated by the flue is limited. The desulfurization wastewater treated by the heat exchanger concentration crystallization method has the problems of corrosion damage of the heat exchanger and low heat exchange efficiency after scaling. Meanwhile, the flue gas waste heat in the flue enters the desulfurizing tower from the dust remover, water is evaporated, waste is wasted, and water supplement of the desulfurizing tower is needed to be added for normal operation of the desulfurizing tower, so that the water consumption and the operating cost are high. Therefore, the desulfurization waste water concentration device is necessary for treating the problem of overlarge water amount of desulfurization waste water by using the waste heat of flue gas, increasing the inlet air humidity of the desulfurization tower, reducing the water supplement of the desulfurization tower and reducing the water consumption and the operating cost.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an evaporation and concentration device utilizing flue gas and a desulfurization wastewater treatment system.
The invention is realized by the following steps:
the invention provides an evaporation and concentration device utilizing flue gas, which comprises a tower body, wherein a sedimentation tank and a spray assembly are arranged in the tower body, a clear liquid tank for containing overflow liquid of the sedimentation tank is also arranged in the tower body, the spray assembly is connected with the clear liquid tank through a pipeline, a liquid inlet, a liquid outlet, a flue gas inlet and a flue gas outlet are arranged on the tower body, the liquid inlet is connected with the sedimentation tank through a pipeline, the liquid outlet is connected with the clear liquid tank, the flue gas inlet is positioned below the spray assembly, and the flue gas outlet is positioned at the top of the tower body.
Further, still be provided with the defroster in the tower body, the defroster follows the cross section setting of tower body and being located spray assembly with between the exhanst gas outlet.
Further, the demister also comprises a flushing pipeline used for flushing the demister.
Furthermore, the flue gas inlet is provided with a plurality of flue gas inlets, and the flue gas inlets are sequentially distributed at intervals along the circumferential direction of the tower body.
Furthermore, a distribution valve for externally connecting a flue gas pipeline is arranged on the outer side of the tower body, and the distribution valve is communicated with each flue gas inlet.
Furthermore, the spraying assembly comprises at least one layer of horizontally arranged annular spraying pipe, the annular spraying pipe is connected with the clear liquid pool through a pipeline, a plurality of downward nozzles are arranged on the annular spraying pipe, and the nozzles are sequentially distributed at intervals along the circumferential direction of the corresponding annular spraying pipe.
Further, the sedimentation tank is hopper-shaped, the clear liquid pond surrounds the sedimentation tank, just the sedimentation tank is connected with the blow off pipe, be provided with the sludge pump on the blow off pipe.
Furthermore, the clear liquid pool is connected with the sewage discharge pipe, and a valve for controlling on-off is arranged on a connecting pipeline between the clear liquid pool and the sewage discharge pipe.
Further, be provided with turbidimeter and level gauge in the clear liquid pond, in exhanst gas outlet and clear liquid pond department all are provided with the thermometer.
The embodiment of the invention also provides a desulfurization wastewater treatment system which comprises a desulfurization tower and the concentration device, wherein the desulfurization tower is connected with the flue gas outlet.
The invention has the following beneficial effects:
according to the invention, the sedimentation tank is arranged in the tower body, the desulfurization wastewater firstly enters the sedimentation tank for sedimentation, the clear liquid on the upper layer overflows into the clear liquid tank, the clear liquid of the desulfurization wastewater can be downwards atomized and sprayed out through the spraying assembly, high-temperature flue gas enters the tower body from the flue gas inlet and then can directly contact with the desulfurization wastewater sprayed out of the spraying assembly for heat exchange, a large amount of moisture in the desulfurization wastewater can be taken away, and the flue gas and mixed steam are discharged out of the tower body from the flue gas outlet. In the process, the desulfurization wastewater is contacted with the high-temperature flue gas for heat exchange, so that the aim of concentrating the desulfurization wastewater can be fulfilled, the scaling problem in the concentration process is avoided, the flue gas purification effect can be played, and the flue gas humidity in the desulfurization tower can be guaranteed. In addition, the desulfurization waste water after spraying can be collected to the clear liquid pond again, by the spraying assembly circulation blowout, the desulfurization waste water in the clear liquid pond is concentrated to certain degree and is discharged the tower body behind the formation desulfurization waste water dense liquid, and the precipitate that sedimentation tank bottom and clear liquid pond bottom formed then can be collected the filter-pressing.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an evaporative concentration apparatus using flue gas according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the internal structure of the tower body of the flue gas evaporation and concentration device in FIG. 1;
fig. 3 is another view-angle structure diagram of the flue gas evaporation and concentration device in fig. 1.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 and 2, an embodiment of the present invention provides an evaporation concentration apparatus using flue gas, for concentrating desulfurization waste water, including a tower body 1, a sedimentation tank 2, a clear liquid tank 3 and a spray assembly 4 are disposed in the tower body 1, the tower body 1 is provided with a liquid inlet, a liquid outlet, a flue gas inlet 131 and a flue gas outlet 14, wherein the liquid inlet is connected to the sedimentation tank 2 through a pipeline, specifically, the liquid inlet is provided with a liquid inlet pipeline 11, one end of the liquid inlet pipeline 11 is externally connected to a desulfurization waste water conveying pipeline, the other end extends to the sedimentation tank 2, the liquid inlet pipeline 11 is provided with a conveying pump 111, desulfurization waste water is introduced into the sedimentation tank 2 through the conveying pump 111, desulfurization waste water is precipitated in the sedimentation tank 2, clear liquid on the upper layer automatically overflows into the clear liquid tank 3, the liquid outlet is connected to the clear liquid tank 3, and liquid in the clear liquid tank 3 can be discharged out of the tower body 1 through the liquid outlet, the overflow scheme between the sedimentation tank 2 and the clear liquid tank 3 can take various forms, for example, an overflow pipe is arranged on the sedimentation tank 2, the overflowed clear liquid is guided into the clear liquid tank 3 through the overflow pipe, or the clear liquid tank 3 surrounds the sedimentation tank 2, and the clear liquid overflows from the upper port of the sedimentation tank 2. In addition, the clear liquid pool 3 is also connected with the spray assembly 4 through the pipeline 12, the circulating pump 121 is arranged on the pipeline 12, liquid (desulfurization waste water clear liquid) in the clear liquid pool 3 can be extracted to the spray assembly 4 and is sprayed out through the spray assembly 4, in the vertical direction, the spray assembly 4 is positioned between the flue gas inlet 131 and the flue gas outlet 14, specifically, the flue gas inlet 131 is positioned below the spray assembly 4, the flue gas outlet 14 is positioned above the spray assembly 4 and is the top of the tower body 1, high-temperature flue gas enters the tower body 1 through the flue gas inlet 131, and is discharged out of the tower body 1 through the flue gas outlet 14 after the region where the spray assembly 4 is positioned. In this embodiment, desulfurization waste water carries out the sediment earlier after getting into tower body 1, the supernatant is overflowed to clear liquid pond 3 by sedimentation tank 2, clear liquid extraction to spray assembly 4 department and spout downwards in the clear liquid pond 3 of rethread circulating pump 121, because flue gas inlet 131 is located spray assembly 4 below, then high temperature flue gas gets into tower body 1 back, can contact the heat transfer with spray assembly 4 spun desulfurization waste water clear liquid, and then can take away the partial moisture in the desulfurization waste water clear liquid, play concentrated desulfurization waste water's purpose, can also realize the purification to high temperature flue gas through desulfurization waste water clear liquid simultaneously, wash the particulate matter that contains wherein etc.. In fact, desulfurization waste water after the heat transfer can be collected to clear liquid pond 3 again in, and concentrated with high temperature flue gas circulation heat transfer by circulating pump 121 and 4 cooperations of spray assembly, and after concentrating to a certain degree, then can be discharged the desulfurization waste water concentrate in clear liquid pond 3 by the liquid outlet, specifically be provided with fluid-discharge tube 15 in liquid outlet department, be provided with positive displacement pump 151 on it, through the concentrate in positive displacement pump 151 extraction clear liquid pond. In the above process, the sludge layer deposited below the sedimentation tank 2 can be discharged from the sewage discharge pipe 16 through the sludge pump 161, and the discharged sludge is processed by a filter press, so that the sedimentation tank 2 adopts a bucket-shaped structure in order to facilitate the sludge deposition in the sedimentation tank 2; certainly, after clear solution pond 3 is concentrated for a period, clear solution pond 3's bottom also can deposit there is the mud layer, then also can adopt sludge pump 161 to discharge the silt in clear solution pond 3, to sludge pump 161 and blow off pipe 16, clear solution pond 3 and sedimentation tank 2 can share, sludge pump 161 sets up on blow off pipe 16, all be provided with the valve of control break-make on the connecting pipeline between blow off pipe 16 and clear solution pond 3 and the sedimentation tank 2 in addition, specifically when sedimentation tank 2 needs the blowdown, then the pipeline that sedimentation tank 2 corresponds is opened, the pipeline that clear solution pond 3 corresponds is closed, otherwise the pipeline that sedimentation tank 2 corresponds is closed, the pipeline that clear solution pond 3 corresponds is opened.
Referring to fig. 2, in order to optimize the above embodiment, a demister 5 is further disposed in the tower body 1, and the demister 5 is arranged along the cross section of the tower body 1 and is located between the spray assembly 4 and the flue gas outlet 14. In this embodiment, defroster 5 covers one of them cross section in the tower body 1, and high temperature flue gas is discharged by 14 discharge of exhanst gas outlet earlier through defroster 5 after spraying the heat transfer, can eliminate the droplet that carries in the high temperature flue gas through defroster 5 again to make the high temperature flue gas can only carry the steam in the desulfurization waste water. In addition, the demister 5 can also slow down the flow of the high-temperature flue gas so as to improve the heat exchange efficiency between the high-temperature flue gas and the desulfurization wastewater. To defroster 5, still be provided with and wash pipeline 51, wash the pipeline and set up in defroster 5's top, also can adopt the mode that sprays to erode defroster 5 to the realization is to defroster 5's washing, avoids the dust etc. in the high temperature flue gas to bond on defroster 5 through desulfurization waste water, and the flue gas flow path is blockked up in the scale deposit.
Referring to fig. 2 and fig. 3, in a preferred embodiment of the present invention, the tower body 1 has a plurality of flue gas inlets 131, and each flue gas inlet 131 is sequentially distributed at intervals along the circumferential direction of the tower body 1, for example, four flue gas inlets 131 may be provided, the four flue gas inlets 131 are uniformly distributed along the circumferential direction of the tower body 1, and an angle between two adjacent flue gas inlets 131 is 90 degrees. Through this kind of mode, can be so that high temperature flue gas gets into tower body 1 back, high temperature flue gas is evenly distributed in tower body 1, and spray assembly 4 spun desulfurization waste water can fully exchange heat with high temperature flue gas. In order to simplify the high-temperature flue gas flow path, a distribution valve 13 is arranged on the outer side of the tower body 1, and the distribution valve 13 can be connected with an external flue gas pipeline and is communicated with each flue gas inlet 131. The distributing valve 13 has an import, a plurality of exports, export and flue gas inlet 131 one-to-one, and external flue gas pipeline only needs to be connected with distributing valve 13 from this, can provide the high temperature flue gas in the tower body 1 by a plurality of flue gas inlets 131 simultaneously, can simplify the flue gas pipeline in the tower body 1 outside and lay greatly.
Referring to fig. 2 again, the embodiment of the present invention further provides a spraying assembly 4, where the spraying assembly 4 includes at least one layer of annular spraying pipe 41, the annular spraying pipe 41 is horizontally disposed and connected to the clear liquid tank 3 through a pipeline 12, and a plurality of nozzles are disposed on the annular spraying pipe 41, and each nozzle is downward and is sequentially and uniformly spaced along the circumferential direction of the annular spraying pipe 41. Through circulating pump 121 with the desulfurization waste water extraction in the clear solution pond 3 to annular spray pipe 41 in, spout downwards again by each spout on the annular spray pipe 41, can set up atomizing nozzle 411 to the spout, desulfurization waste water spouts with atomizing form, can improve the heat transfer effect between desulfurization waste water and the high temperature flue gas. Spray assembly 4 can adopt two sets of annular spray tube 41 more than and, and each group sets gradually along vertical direction, and the in-process that rises in tower body 1 is followed to this high temperature flue gas, can carry out the heat exchange with the 41 spun desulfurization waste water of multiunit annular spray tube, further promotes both heat exchange efficiency.
Referring to fig. 1-3, further, a turbidity meter 17 and a liquid level meter 18 are arranged in the clear liquid tank 3, and thermometers 19 are arranged at the flue gas outlet 14 and the clear liquid tank 3. In this embodiment, the turbidity of the desulfurization wastewater in the clear liquid tank 3 can be detected by the turbidity meter 17, and the precipitation condition in the clear liquid tank 3 is reflected, for example, when the turbidity is high, it indicates that the content of sludge in the clear liquid tank 3 is high, it can be considered that the sludge pump 161 is started to pump out sludge accumulated at the bottom layer, so as to avoid pipeline clogging, in addition, the concentration ratio of the desulfurization wastewater in the clear liquid tank 3 can be determined by combining with the liquid level meter 18, and further, whether the desulfurization wastewater concentrated in the clear liquid tank 3 is discharged from the liquid discharge pipe 15 can be considered; the thermometer 19 is used for detecting the temperature of the high-temperature flue gas discharged from the tower body 1 and can also detect the temperature of the desulfurization wastewater in the clear liquid pool 3, so as to control the air guiding quantity of the high-temperature flue gas entering the tower body 1.
Referring to fig. 1, the embodiment of the present invention further provides a desulfurization wastewater treatment system, which includes a desulfurization tower and the above-mentioned concentration device, wherein the desulfurization tower is connected to the flue gas outlet 14. In this embodiment, be applied to among the desulfurization wastewater treatment system with above-mentioned enrichment facility, and combine together with gas cleaning, high temperature flue gas passes through in the flue gets into enrichment facility, purifies high temperature flue gas through desulfurization wastewater on the one hand, and concentrated desulfurization wastewater on the other hand, the high temperature flue gas after the purification can enter into the desulfurizing tower and continue desulfurization and denitration treatment, and concentrated desulfurization wastewater then can spout into and carry out evaporation treatment in the high temperature flue, can reach the purpose of desulfurization wastewater zero release. In this process, because high temperature flue gas can carry certain steam when being discharged from the tower body 1 by the flue gas outlet 14, show promptly through behind the concentrated desulfurization waste water that high temperature flue gas has certain humidity, and then can reduce the moisturizing volume in the desulfurizing tower, reduce water and water cost and working costs.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (9)

1. The utility model provides an utilize flue gas evaporative concentration device, includes the tower body, its characterized in that: a sedimentation tank and a spray assembly are arranged in the tower body, a clear liquid tank for containing overflow liquid of the sedimentation tank is also arranged in the tower body, the spraying component is connected with the clear liquid tank through a pipeline, a liquid inlet, a liquid outlet, a flue gas inlet and a flue gas outlet are arranged on the tower body, the liquid inlet is connected with the sedimentation tank through a pipeline, the liquid outlet is connected with the clear liquid tank, the flue gas inlet is positioned below the spray assembly, the flue gas outlet is positioned at the top of the tower body, a turbidimeter and a liquid level meter are arranged in the clear liquid pool, thermometers are arranged at the smoke outlet and the clear liquid pool, still be provided with in the tower body and be located the water conservancy diversion frame of sedimentation tank top, the top of water conservancy diversion frame with the inner wall contact of tower body, the bottom of water conservancy diversion frame is less than the top of sedimentation tank.
2. The evaporative concentration apparatus using flue gas as claimed in claim 1, wherein: a demister is further arranged in the tower body and arranged along the cross section of the tower body and located between the spray assembly and the flue gas outlet.
3. The evaporative concentration apparatus using flue gas as claimed in claim 2, wherein: the demister also comprises a flushing pipeline used for flushing the demister.
4. The evaporative concentration apparatus using flue gas as claimed in claim 1, wherein: the flue gas inlet has a plurality ofly, each the flue gas inlet is along the circumference of tower body interval distribution in proper order.
5. The evaporative concentration device using flue gas as claimed in claim 4, wherein: and a distribution valve for externally connecting a flue gas pipeline is arranged on the outer side of the tower body and is communicated with each flue gas inlet.
6. The evaporative concentration apparatus using flue gas as claimed in claim 1, wherein: the spray assembly comprises at least one layer of horizontally arranged annular spray pipe, the annular spray pipe is connected with the clear liquid pool through a pipeline, a plurality of downward nozzles are arranged on the annular spray pipe, and the nozzles are distributed at intervals along the circumferential direction of the annular spray pipe in sequence.
7. The evaporative concentration apparatus using flue gas as claimed in claim 1, wherein: the sedimentation tank is hopper-shaped, the clear solution pond surrounds the sedimentation tank, just the sedimentation tank is connected with the blow off pipe, be provided with the sludge pump on the blow off pipe.
8. The evaporative concentration apparatus using flue gas as claimed in claim 7, wherein: the clear liquid pool is connected with the blow-off pipe, and a valve for controlling on-off is arranged on a connecting pipeline of the clear liquid pool and the blow-off pipe.
9. The utility model provides a desulfurization effluent disposal system, includes the desulfurizing tower which characterized in that: further comprising a concentration device according to any one of claims 1 to 8, the desulfurization tower being connected to the flue gas outlet.
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